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Sample records for sarkosyl neocarzinostatin adriamycin

  1. Use of sodium lauroyl sarcosinate (sarkosyl) in viable real-time PCR for enumeration of Escherichia coli.

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    Wang, Hui; Gill, Colin O; Yang, Xianqin

    2014-03-01

    The cell membranes of inactivated Escherichia coli are not always permeable to propidium monoazide (PMA). This limits the use of PMA real-time PCR (PMA-qPCR) for quantification of DNA from only viable cells for enumeration of E. coli. The aim of this study was to develop PMA-qPCR procedures for E. coli with improved selectivity for viable cells. E. coli inactivated by incubation at 52°C were treated with 12 detergents before PMA treatment, and DNA was quantified by real-time PCR. Treatment with each of the 12 detergents and PMA increased the cycle threshold (Ct) values for heat inactivated E. coli suspensions. The greatest increase, of 10.68 Ct was obtained with sarkosyl. Treatment with sodium deoxycholate (NaDC) increased the Ct value by 8.99 Ct. Treatment with sarkosyl or NaDC of 16 heat treated 5-strain cocktails of verotoxigenic E. coli (VTEC) increased the mean Ct values by 8.15 or 6.82 Ct, respectively. Those mean values were significantly (pnumbers of viable E. coli were 2.24 and 2.47, respectively, with regression coefficient values ≥0.85. The findings show that sarkosyl was more effective than NaDC for dissipation of PMA-barrier properties of membranes of inactivated E. coli cells. Viable E. coli in mixtures of viable E. coli and E. coli inactivated by heat, lactic acid or peroxyacetic acid could be reliably enumerated by sarkosyl PMA-qPCR. Copyright © 2014 Elsevier B.V. All rights reserved.

  2. Vascular dysfunction in adriamycin nephrosis : different effects of adriamycin exposure and nephrosis

    NARCIS (Netherlands)

    Ulu, Nadir; Buikema, Hendrik; van Gilst, Wiek H.; Navis, Gerjan

    Background. Nephrosis-induced endothelial dysfunction is assumed to play a main role in cardiovascular morbidity. Adriamycin-induced proteinuria is a well-established rat model for nephrotic syndrome. However, induction of nephrosis by intravenous adriamycin administration might exert direct

  3. Artificial Metalloenzymes with the Neocarzinostatin Scaffold: Toward a Biocatalyst for the Diels-Alder Reaction.

    Science.gov (United States)

    Ghattas, Wadih; Cotchico-Alonso, Lur; Maréchal, Jean-Didier; Urvoas, Agathe; Rousseau, Maëva; Mahy, Jean-Pierre; Ricoux, Rémy

    2016-03-02

    A copper(II) cofactor coupled to a testosterone anchor, copper(II)-(5-(Piperazin-1-yl)-1,10-phenanthroline)testosterone-17-hemisuccinamide (10) was synthesized and associated with a neocarzinostatin variant, NCS-3.24 (KD =3 μm), thus generating a new artificial metalloenzyme by following a "Trojan horse" strategy. Interestingly, the artificial enzyme was able to efficiently catalyze the Diels-Alder cyclization reaction of cyclopentadiene (1) with 2-azachalcone (2). In comparison with what was observed with cofactor 10 alone, the artificial enzymes favored formation of the exo products (endo/exo ratios of 84:16 and 62:38, respectively, after 12 h). Molecular modeling studies assigned the synergy between the copper complex and the testosterone (KD =13 μm) moieties in the binding of 10 to good van der Waals complementarity. Moreover, by pushing the modeling exercise to its limits, we hypothesize on the molecular grounds that are responsible for the observed selectivity. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  4. Molecular Basis of Substrate Promiscuity for the SAM-Dependent O-Methyltransferase NcsB1, Involved in the Biosynthesis of the Enediyne Antitumor Antibiotic Neocarzinostatin

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    Cooke, H.; Guenther, E; Luo, Y; Shen, B; Bruner, S

    2009-01-01

    The small molecule component of chromoprotein enediyne antitumor antibiotics is biosynthesized through a convergent route, incorporating amino acid, polyketide, and carbohydrate building blocks around a central enediyne hydrocarbon core. The naphthoic acid moiety of the enediyne neocarzinostatin plays key roles in the biological activity of the natural product by interacting with both the carrier protein and duplex DNA at the site of action. We have previously described the in vitro characterization of an S-adenosylmethionine-dependent O-methyltransferase (NcsB1) in the neocarzinostatin biosynthetic pathway [Luo, Y., Lin, S., Zhang, J., Cooke, H. A., Bruner, S. D., and Shen, B. (2008) J. Biol. Chem. 283, 14694-14702]. Here we provide a structural basis for NcsB1 activity, illustrating that the enzyme shares an overall architecture with a large family of S-adenosylmethionine-dependent proteins. In addition, NcsB1 represents the first enzyme to be structurally characterized in the biosynthetic pathway of neocarzinostatin. By cocrystallizing the enzyme with various combinations of the cofactor and substrate analogues, details of the active site structure have been established. Changes in subdomain orientation were observed via comparison of structures in the presence and absence of substrate, suggesting that reorientation of the enzyme is involved in binding of the substrate. In addition, residues important for substrate discrimination were predicted and probed through site-directed mutagenesis and in vitro biochemical characterization.

  5. Lisinopril Protects Against the Adriamycin Nephropathy and Reverses the Renalase Reduction: Potential Role of Renalase in Adriamycin Nephropathy

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    Pengxun Han

    2013-09-01

    Full Text Available Aims: To investigate the potential role of renalase in adriamycin nephropathy and the effect of lisinopril on the regulation of renalase. Methods: Adriamycin nephropathy was induced in male Wistar rats (n=12 by a single injection of adriamycin at 2 mg/kg body weight. Rats were then randomly assigned to a model group or a treatment group, to which were administered distilled water or the angiotensin converting enzyme inhibitor lisinopril, respectively, for 12 weeks. Six normal rats served as controls. At the end of study, physiological parameters and systolic blood pressure were measured. Glomerulosclerosis and tubulointerstitial injury were assessed by histopathology Renalase protein expression in kidney was quantified by immunohistochemistry and immunoblotting. The serum concentration and urinary excretion of renalase were determined by enzyme-linked immunosorbent assay. Results: In model group rats, proteinuria and systolic blood pressure were elevated. Increased serum renalase concentration was observed; however, renalase protein expression in the kidney was significantly decreased. Compared with the model group, decreased proteinuria, lower systolic blood pressure, and fewer morphologic lesions were detected in the treatment group. Although levels of serum renalase were similar, accumulation of renalase in urine and kidney tissue increased notably in the treatment group compared with the model group. Conclusions: This study suggests that renalase may be involved in the process of adriamycin-induced renal injuries. Lisinopril may attenuate adriamycin-induced kidney injury by controlling blood pressure, which may be partially attributed to the renalase expression and secretion.

  6. Optimization of macromolecular prodrugs of the antitumor antibiotic adriamycin

    NARCIS (Netherlands)

    Hoes, C.J.T.; Potman, W.; Heeswijk, W.A.R.; Mud, J.; de Grooth, B.G.; Greve, Jan; Feijen, Jan

    1985-01-01

    In our earlier work [10] on aminoribosyl-bound prodrugs of adriamycin (ADR) using poly(α-l-glutamic acid) (PGA) grafted in high yield (90–100 mol.%) with various peptide spacers as a plasma-soluble macromolecular carrier we observed rather low cytotoxic activities in L1210 leukemia and B16 melanoma

  7. Effect of Hydroalcholic Extract of Curcuma longa on Adriamycin-Induced Renal Damage in Rats

    OpenAIRE

    R. Mohebbati; A.A. Abbasnezhad; A. Khajavi Rad; Haghshenas, M.; M.R. Khazdeir

    2016-01-01

    Aims: Adriamycin is one of the anti-cancer medications. Nevertheless, the medication causes renal damage. Curcuma longa has anti-inflammatory and anti-oxidant effects. The aim of this study was to determine the effects of hydroalcoholic extract of Curcuma longa on renal damage due to Adriamycin in the rat. Materials & Methods: In the experimental study, 32 male Wistar rats were studied. Via simple random method, the rats were divided into four groups including control, Adriamycin (5mg/Kg)...

  8. Enhanced myocardial fluorodeoxyglucose uptake following Adriamycin-based therapy: Evidence of early chemotherapeutic cardiotoxicity?

    OpenAIRE

    Borde, Chaitanya; Kand, Purushottam; Basu, Sandip

    2012-01-01

    AIM: To analyze changes in myocardial glucose metabolism using fluorodeoxyglucose (FDG)-positron emission tomography (PET) in patients treated with adriamycin and to investigate the clinical significance of these changes.

  9. AFM studies of DNA structures extracted from adriamycin treated and non-treated Ehrlich tumor cells

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    M. AVRAMOV IVIC

    2005-06-01

    Full Text Available Atomic force microscopy (AFM, a unique tool to investigate drug treatment of cancer cells, was used to analyze the anti-neoplastic activity of adriamycin by comparing DNA structures of non-treated and adriamycin-treated Ehrlich tumor cells. The non-treated cells exhibited a highly branched intact chromatin structure, related to the intensive DNA replication in cancer cells. Images from adriamycin-treated tumor cells showed that the DNA chains were broken and the chromatin structure had been destroyed. Possible explanations for these effects of adriamycin are considered: breakage of hydrogen bonding, oxidation and intercalation effects, as well as the poisoning of topoisomerase enzyme. DNA fractal andmultifractal analyses, performed in order to evaluate the degree of bond scission, showed that the treated DNA had become more fractal compared to non-treated DNA.

  10. Targeting behavior of hepatic artery injected temperature sensitive liposomal adriamycin on tumor-bearing rats.

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    Zou, Y Y; Ueno, M; Yamagishi, M; Horikoshi, I; Yamashita, I; Tazawa, K; Gu, X Q

    1990-01-01

    Temperature sensitive liposomal Adriamycin (LADM) was injected into the hepatic artery of rats bearing implanted hepatic tumors. Two hours after the injection, the liver was heated at 42 degrees C and maintained for six minutes at that temperature using local hyperthermia. Blood samples were taken at regular intervals until 8 hours after injection, at which time the animals were sacrificed and the drug distribution in the tissues was examined. Results indicate that the Adriamycin was released from the liposome, with the drug concentration in circulation peaking at 30 minutes after heating. High drug levels (25.2 micrograms/g of wet tissue) in the tumor and high tumor/liver Adriamycin level ratios (TLAR; 4.1) were found. The drug levels and the TLAR of the liposomal Adriamycin injection combined with heating (LADM H) were significantly different from those of the same dose of aqueous Adriamycin with heating (ADM H) or aqueous Adriamycin (ADM) and LADM without heating. The experiment shows that the LADM is cleared from the liver slowly, and when hyperthermia treatment at phase-transition temperature of the liposome is performed, the drug level in an implanted hepatic tumor is increased, and in the parenchyma is decreased. The results imply that targeting the hepatic tumor in this way may be an effective therapeutic method, and the drug release from the liposome may be controlled externally. This method appears promising for clinical practice.

  11. Adriamycin nephrosis and contrast media; A comparison between diatrizoate and iohexol in rats

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    Thomsen, H.S.; Golman, K.; Hemmingsen, L.; Larsen, S.; Skaarup, P. (Koebenhavns Amts Sygehus, Herlev (Denmark). Dept. of Diagnostic Radiology Koebenhavns Amts Sygehus, Herlev (Denmark). Dept. of Nuclear Medicine Koebenhavns Amts Sygehus, Herlev (Denmark). Inst. of Pathology Centralsygehuset, Nykoebing Falster (Denmark). Dept. of Clinical Chemistry Malmoe Allmaenna Sjukhus (Sweden). Dept. of Experimental Research)

    1990-01-01

    Urine profiles (albumin, glucose, NAG, LDH, GGT and sodium) were followed for 9 days after intravenous injection of either diatrizoate, iohexol, or saline in 27 Wistar rats with nephrosis induced by Adriamycin 42 days before. Another 9 rats exposed to neither Adriamycin nor contrast media served as controls. None of the contrast media caused further increased albuminuria of significance, whereas both induced significantly increased excretion of all 5 tubular components. The excretion of NAG and sodium was significantly higher following diatrizoate than following iohexol. From 24 h post injection there was no significantly greater excretion of any of the components after either diatrizoate or iohexol than after saline among the rats given Adriamycin. At the end of day 9 after contrast medium injection neither serum sodium, potassium, glucose, urea, creatinine, nor albumin revealed any contrast media related changes. Kidney histology showed quantitatively larger lesions in kidneys exposed to Adriamycin and contrast media than in kidneys exposed to Adriamycin and saline. There were no differences between the two contrast media groups. It is thus concluded, that both high osmolar ionic and low osmolar non-ionic contrast media cause temporary tubular dysfunction but no further glomerular dysfunction in rats with nephrosis induced by Adriamycin. The histologic findings indicate that both media may worsen non-reversible renal lesions. (orig.).

  12. Ameliorating Effect of Gemigliptin on Renal Injury in Murine Adriamycin-Induced Nephropathy

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    Da Rae Kim

    2017-01-01

    Full Text Available Background. Previous studies have shown the antiapoptotic and anti-inflammatory potential of DPP-IV inhibitor in experimental models of renal injury. We tested whether DPP-IV inhibitor (gemigliptin ameliorates renal injury by suppressing apoptosis, inflammation, and oxidative stress in mice with adriamycin nephropathy. Methods. Mice were treated with normal saline (control, gemigliptin (GM, adriamycin (ADR, or adriamycin combined with gemigliptin (ADR+GM. Apoptosis, inflammation, and oxidative stress were analyzed via western blotting, real-time PCR, light microscopy, and immunofluorescence. Results. In the ADR+GM group, urine albumin creatinine ratio decreased significantly compared with that in the ADR group on day 15. Glomerulosclerosis index and tubulointerstitial injury index in mice with adriamycin-induced nephropathy decreased after gemigliptin treatment. ADR group showed higher levels of apoptosis, inflammation, and oxidative stress-related molecules compared with the control group. The upregulation of these molecules was significantly reduced by gemigliptin. In the ADR group, the staining intensities of WT-1 and nephrin reduced, but these changes were ameliorated in the ADR+GM group. Conclusion. We demonstrated that gemigliptin ameliorates nephropathy by suppressing apoptosis, inflammation, and oxidative stress in mice administered adriamycin. Our data demonstrate that gemigliptin has renoprotective effects on adriamycin-induced nephropathy.

  13. Artemisinin ameliorated proteinuria in rats with adriamycin-induced nephropathy through regulating nephrin and podocin expressions.

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    Wu, Xili; An, Peng; Ye, Bingyu; Shi, Xingmin; Dang, Huimin; Fu, Rongguo; Qiao, Chenglin

    2014-02-01

    To investigate the effects of artemisinin against proteinuria and glomerular filtration barrier damage in rats with adriamycin-induced nephropathy, and the potential mechanism underpinned the action. Forty adriamycin rats were randomly divided into two groups with the ratio of 1 : 3; the small-number group served as control group (n = 10), and the rats in the large-number group were treated with adriamycin to induce nephropathy; then they were further randomly assigned into 3 subgroups: benazepril group (n = 10), artemisinin group (n = 10), and adriamycin group (n = 10). The benazepril group and artemisinin group were treated with benazepril suspl (5.0 mg/kg daily) and artemisinin suspl (150 mg/kg daily) respectively after being modeled; those in the control group and adriamycin group were intragastrically administered an equivalent volume of distilled water every day. The treatment after model establishment lasted for a total of 4 weeks. The 24 h uric protein, blood biochemicals, renal pathological changes, renal ultrastrutural changes, Nephrin and Podocin proteins and gene expressions were measured by Coomassie brilliant blue assay, completely automatic biochemical analyzer, light microscope, electron microscopy, Western blot and reverse transcription polymerase chain reaction, respectively. The rats in adriamycin group showed a significant increase in 24 h uric protein excretion, serum total cholesterol (TC), triglyceride (TG), blood urea nitrogen (BUN), serum creatinine (Scr) and decrease in albumin (Alb) (P 0.05). The renal pathological and ultrastrutural observation indicate that artemisinin could attenuate the severity of foot process effacement and fusion in the nephropathic rats. Artemisinin might have an effect on the nephropathy in rats caused by adriamycin, which may be at least partly correlated with attenu- ation of the severity of foot process effacement and fusion, up-regulation of the expressions of Nephrin and Podocin in the glomeruli in the rats.

  14. Effects of adriamycin and candesartan on the collagen and elastin of the aorta in rats.

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    Uhm, Jae-Sun; Chung, Woo-Baek; Yoon, Jung-Sook; Oh, Yong-Seog; Youn, Ho-Joong

    2014-01-01

    It has been reported that the chemotherapeutic agent, adriamycin, not only has an effect on the myocardium but also on the arteries. The aim of this study is to elucidate effects of adriamycin and an angiotensin receptor blocker, candesartan, on collagen and elastin of the aorta in rats. Twenty four male 8-week-old Wistar-Kyoto rats were divided into four groups: control (C) group, adriamycin-treated (AD) group, candesartan-treated (CA) group, and adriamycin- and candesartan-treated (AD + CA) group. Adriamycin of 2.5 mg/kg/wk was administered intraperitoneally one time per week for 6 weeks, and candesartan of 10 mg/kg/day was administered orally everyday for 6 weeks. After 6 weeks, the rats were sacrificed and the aortas were harvested. Hematoxylin-eosin staining, Verhoff's elastic, and Goldner's trichrome staining were performed for histopathologic analyses. Tunica media thickness, collagen, and elastic area fractions were measured quantitatively with a computerized digital image analyzer. Tunica media thickness in the CA and AD + CA groups was significantly lesser than that in the C and AD groups, respectively. The AD and AD + CA groups had a tendency of lower elastin area fraction than the C and CA groups, respectively. Collagen area fraction in the AD + CA group was significantly lower than that in the AD group. There were no significant differences of collagen/elastin ratio between groups. These findings suggest that adriamycin has a tendency of decreasing the quantity of elastin fibers and candesartan cannot mitigate the effects of adriamycin on elastin fibers.

  15. Ovariectomy exacerbates oxidative stress and cardiopathy induced by adriamycin.

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    Muñoz-Castañeda, Juan Rafael; Muntané, Jordi; Herencia, Carmen; Muñoz, Maria C; Bujalance, Inmaculada; Montilla, Pedro; Túnez, Issac

    2006-02-01

    Ovarian hormone depletion in ovariectomized experimental animals is a useful model with which to study the physiopathological consequences of menopause in women. It has been suggested that menopause is a risk factor for the induction of several cardiovascular disorders. In the present study we analyzed the effects of ovarian hormone depletion by ovariectomy (OVX) in a model of oxidative stress and cardiopathy induced by adriamycin (AD). To evaluate these effects, we measured parameters related to cardiac damage (creatinine kinase, lactate dehydrogenase, aspartate aminotransferase and alanine aminotransferase) and oxidative stress (malondialdehyde, catalase, superoxide dismutase, glutathione peroxidase, reduced glutathione, nitric oxide and carbonyl proteins) in cardiac tissue and erythrocytes. OVX was found to alter all markers of oxidative stress and cell damage in cardiac tissue. Similarly, the OVX-derived loss of ovarian hormones enhanced cardiac damage and oxidative stress induced by AD. Our results suggest that antioxidant status in cardiac tissue and erythrocytes is seriously compromised by OVX during the cardiomyopathy induced by AD in experimental animals. In conclusion, the absence of hormones caused by OVX or menopause may induce or accelerate pre-existing cardiovascular dysfunctions.

  16. Decreased ATPase activity in adriamycin nephrosis is independent of proteinuria

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    Bakker, W.W.; Kalicharan, D.; Donga, J.; Hulstaert, C.E.; Hardonk, M.J.

    1987-03-01

    In previous studies from this laboratory it has been shown that ATP-ase activity in situ in the glomerular basement membrane (GBM) is clearly reduced in rats rendered nephrotic after treatment with adriamycin (ADR). The question was raised whether this reduction of ATP-ase activity in the GBM is due to toxic activity of ADR or rather a result of the nephrotic condition per se. Therefore, we studied ATP-ase activity using the cerium-based method in kidneys from ADR-treated rats without proteinuria (48 hr after ADR injection), or with proteinuria (approximately 150 mg/24 hr) several weeks after ADR injection. Also kidneys from rats rendered nephrotic by surgical ablation and from non-nephrotic rats treated with local X-irradiation (2000 rads) as well as from normal control rats were studied. The results show that in the GBM of ADR-treated or irradiated rats, clear reduction of ATP-ase activity is observed irrespective of their proteinuria, whereas in the GBM of rats rendered nephrotic by renal ablation (approximately 156 mg/24 hr mean protein excretion) no reduction of enzyme activity is found. It is concluded that decreased ATP-ase activity of the glomerular filtration barrier in ADR-treated rats is due to an early toxic activity of this drug and not a result of the nephrotic state per se. In view of the identical results in X-irradiated rats, it is likely that ADR may act through production of toxic radicals leading to damage of this membrane-associated enzyme system.

  17. Interactions between copper deficiency, selenium deficiency and adriamycin toxicity

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    Fischer, J.; Tackett, R.; Johnson, M.A. (Univ. of Georgia, Athens (United States))

    1991-03-15

    The objective of this study was to test the hypothesis that there are interactions between copper (Cu) and selenium (Se) status, and adriamycin (ADR) toxicity. Male Sprague Dawley rats were fed Cu,Se adequate; Cu deficient, Se adequate ({minus}Cu); Cu adequate, Se deficient; or Cu,Se deficient diets for 38-41 days. ADR or saline (SAL) were administered weekly for the last 4 weeks of the study. Cu deficiency was confirmed by a 3-fold decrease in liver Cu,Zn-superoxide dismutase and liver Cu, and a 5-fold decrease in RBC Cu,Zn-SOD. Se deficiency was confirmed by a 10-fold decrease in liver glutathione peroxidase (GSH-Px). ADR, Cu deficiency and Se deficiency all caused EKG abnormalities. However, Cu and Se deficiencies did not enhance ADR's influence on EKGs. ADR increased lipid peroxidation in liver by 15% and in heart by 18% (NS). Cu deficiency decreased ADR-induced lipid peroxidation in heart tissue by 25%. ADR influenced Se status by significantly increasing heart GSH-Px, and Cu status by increasing liver Cu, plasma ceruloplasmin and liver Cu, Zn-SOD. These elevations in Cu,Zn-SOD and GSH-Px may be a consequence of the increased lipid peroxidation initiated by ADR. In {minus}Cu rats, ADR caused severe hemolytic anemia characterized by a 19% decrease in hematocrit and a 17-fold increase in splenic Fe. These data suggest that there are numerous interactions between ADR toxicity and Cu and Se status.

  18. Treatment of hepatoma with liposome-encapsulated adriamycin administered into hepatic artery of rats.

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    Sun, Dong-Sheng; Chen, Jiang-Hao; Ling, Rui; Yao, Qing; Wang, Ling; Ma, Zhong; Li, Yu

    2006-08-07

    To observe the therapeutic effects of liposome-encapsulated adriamycin (LADM) on hepatoma in comparison with adriamycin solution (FADM) and adriamycin plus blank liposome (ADM + BL) administered into the hepatic artery of rats. LADM was prepared by pH gradient-driven method. Normal saline, FADM (2 mg/kg), ADM+BL (2 mg/kg), and LADM (2 mg/kg) were injected via the hepatic artery in rats bearing liver W256 carcinosarcoma, which were divided into four groups randomly. The therapeutic effects were evaluated in terms of survival time, tumor enlargement ratio, and tumor necrosis degree. The difference was determined with ANOVA and Dunnett test and log rank test. Compared to FADM or ADM + BL, LADM produced a more significant tumor inhibition (tumor volume ratio: 1.243 +/- 0.523 vs 1.883 +/- 0.708, 1.847 +/- 0.661, P LADM compared with FADM or ADM+BL (231.48 vs 74.66, 94.70) (P < 0.05). The anticancer efficacies of adriamycin on hepatoma can be strongly improved by liposomal encapsulation through hepatic arterial administration.

  19. Development and identification of a multicompartment model for the distribution of adriamycin in the rat

    NARCIS (Netherlands)

    Sonneveld, P.; Mulder, J.A.

    1981-01-01

    The distribution kinetics of adriamycin in the rat were analyzed by using a multicompartment mathematical model. The set of a priori unknown model parameters, the drug rate constants, were estimated from 48 hr multicompartment drug distribution data by applying multivariate system identification

  20. Adriamycin-induced cardiomyopathy can serve as a model for diabetic cardiomyopathy – a hypothesis

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    Kaviyarasi Renu

    2017-11-01

    Full Text Available Diabetic cardiomyopathy is one of the life threatening complications of diabetes. A number of animal models are being used for studying diabetic cardiomyopathy. In laboratory animal models, induction of cardiomyopathy happens in two stages: first being the induction of diabetic condition and the second being the induction of cardiomyopathy by prolonging diabetic condition. It takes a longer time to develop diabetes with the limited success rate for development of cardiomyopathy. Adriamycin is an effective anti-cancer drug limited by its major side-effect cardiomyopathy. A number of features of Adriamycin treatment mimics diabetes. We postulate that Adriamycin-induced cardiomyopathy might be used as a model system to study diabetic cardiomyopathy in rodents since a number of features of both the cardiomyopathies overlap. Left ventricular hypertrophy, systolic and diastolic dysfunction, myofibrillar loss, and fibrosis are hallmarks of both of the cardiomyopathies. At the molecular level, calcium signaling, endoplasmic reticulum stress, advance glycation endproduct activation, mitochondrial dysfunction, inflammation, lipotoxicity and oxidative stress are similar in both the cardiomyopathies. The signature profile of both the cardiomyopathies shares commonalities. In conclusion, we suggest that Adriamycin induced cardiomyopathic animal model can be used for studying diabetic cardiomyopathy and would save time for researchers working on cardiomyopathy developed in rodent using the traditional method.

  1. ADRIAMYCIN-LOADED ALBUMIN-HEPARIN CONJUGATE MICROSPHERES FOR INTRAPERITONEAL CHEMOTHERAPY

    NARCIS (Netherlands)

    CREMERS, HFM; SEYMOUR, LW; LAM, K; LOS, G; KWON, G; BAE, YH; KIM, SW; FEIJEN, J

    1994-01-01

    Adriamycin-loaded albumin-heparin conjugate microspheres (ADR-AHCMS) were evaluated as possible intraperitoneal (i.p.) delivery systems for site-specific cytotoxic action. The biocompatibility of the microspheres after intraperitoneal injection was tested first. 1 day after i.p. administration of

  2. Adriamycin-loaded albumin-heparin conjugate microspheres for intraperitoneal chemotherapy

    NARCIS (Netherlands)

    Cremers, Harry; Cremers, H.F.M.; Seymour, L.W.; Lam, K.; Los, G.; van Vugt, M.; Kwon, G.; Bae, Y.H.; Kim, S.W.; Feijen, Jan

    1994-01-01

    Adriamycin-loaded albumin-heparin conjugate microspheres (ADR-AHCMS) were evaluated as possible intraperitoneal (i.p.) delivery systems for site-specific cytotoxic action. The biocompatibility of the microspheres after intraperitoneal injection was tested first. 1 day after i.p. administration of

  3. Myocardial regeneration in adriamycin cardiomyopathy by nuclear expression of GLP1 using ultrasound targeted microbubble destruction

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    Chen, Shuyuan [Baylor Research Institute, Baylor University Medical Center, 3812 Elm Street, Dallas, TX (United States); Chen, Jiaxi [The University of Texas Southwestern Medical Center at Dallas, Medical School, 5235 Harry Hine Blvd., Dallas, TX (United States); Huang, Pintong [Department of Ultrasonography, The 2nd Affiliated Hospital of Zhejiang University College of Medicine, Hangzhou, Zhejiang Province (China); Meng, Xing-Li; Clayton, Sandra; Shen, Jin-Song [Baylor Research Institute, Baylor University Medical Center, 3812 Elm Street, Dallas, TX (United States); Grayburn, Paul A., E-mail: paulgr@baylorhealth.edu [Baylor Research Institute, Baylor University Medical Center, 3812 Elm Street, Dallas, TX (United States); Department of Internal Medicine, Division of Cardiology, Baylor Heart and Vascular Institute, Baylor University Medical Center, 621 N. Hall St, Suite H030, Dallas, TX (United States)

    2015-03-20

    Recently GLP-1 was found to have cardioprotective effects independent of those attributable to tight glycemic control. Methods and results: We employed ultrasound targeted microbubble destruction (UTMD) to deliver piggybac transposon plasmids encoding the GLP-1 gene with a nuclear localizing signal to rat hearts with adriamycin cardiomyopathy. After a single UTMD treatment, overexpression of transgenic GLP-1 was found in nuclei of rat heart cells with evidence that transfected cardiac cells had undergone proliferation. UTMD-GLP-1 gene therapy restored LV mass, fractional shortening index, and LV posterior wall diameter to nearly normal. Nuclear overexpression of GLP-1 by inducing phosphorylation of FoxO1-S256 and translocation of FoxO1 from the nucleus to the cytoplasm significantly inactivated FoxO1 and activated the expression of cyclin D1 in nuclei of cardiac muscle cells. Reversal of adriamycin cardiomyopathy appeared to be mediated by dedifferentiation and proliferation of nuclear FoxO1-positive cardiac muscle cells with evidence of embryonic stem cell markers (OCT4, Nanog, SOX2 and c-kit), cardiac early differentiation markers (NKX2.5 and ISL-1) and cellular proliferation markers (BrdU and PHH3) after UTMD with GLP-1 gene therapy. Conclusions: Intranuclear myocardial delivery of the GLP-1gene can reverse established adriamycin cardiomyopathy by stimulating myocardial regeneration. - Highlights: • The activation of nuclear FoxO1 in cardiac muscle cells associated with adriamycin cardiomyopathy. • Myocardial nuclear GLP-1 stimulates myocardial regeneration and reverses adriamycin cardiomyopathy. • The process of myocardial regeneration associated with dedifferentiation and proliferation.

  4. Antitumor effects of liposomes containing adriamycin on chemically-induced rat malignant fibrous histiocytoma.

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    Nishida, K; Yonemura, K; Abe, Y; Takagi, K

    1995-05-01

    Malignant fibrous histiocytoma (MFH) is the most common soft tissue sarcoma. No effective chemotherapeutic agents, however, have been reported. Here we report our evaluation of the antitumor effects of liposomes containing adriamycin (LADM) against chemically-induced rat MFH. Either free adriamycin (ADM) or LADM was administered at dosages of 4.0, 8.0 or 12.0 mg/kg by intravenous injection. The tumor responded to LADM with prolonged growth delay, but equivalent doses of free ADM were less effective. Additionally, LADM prolonged the life span of rats longer than did free ADM. Also, the body weight loss was less with LADM than with equivalent doses of free ADM. In tissue distribution studies, we observed that the ADM level in the blood and in the tumor with LADM remained higher than with free ADM. These results indicate that liposomes alter in vivo ADM tissue distribution and increase antitumor activity against rat MFH with reduced toxic side effects.

  5. [Contractile function of the isolated heart in chronic adriamycin-induced myocardial lesions].

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    Kapel'ko, V I; Popovich, M I; Golikov, M A; Novikova, N A; Shul'zhenko, V S

    1987-07-01

    Adriamycin, administered to rats for 4 weeks, caused insufficiency of isolated heart contractility with a twofold reduction of cardiac output in surviving animals. The same cumulative dose of adriamycin, administered to rats over 10 weeks, was not associated with any significant reduction of the heart's pumping function. However, heart rate increase by atrial electrostimulation that shortened the diastolic pause to a control level, also reduced the minute and stroke volumes by 38%, as compared to the controls. All animals showed increased diastolic stiffness of the left ventricle that must have interfered with its filling, particularly so in case of low inflow pressure, and disturbed atrial automaticity, as reflected in bradicardia in rats and supraventricular arrhythmia in guinea pigs.

  6. Inhibition of cyclooxygenase-2 reduces hypothalamic excitation in rats with adriamycin-induced heart failure.

    Directory of Open Access Journals (Sweden)

    Min Zheng

    Full Text Available BACKGROUND: The paraventricular nucleus (PVN of the hypothalamus plays an important role in the progression of heart failure (HF. We investigated whether cyclooxygenase-2 (COX-2 inhibition in the PVN attenuates the activities of sympathetic nervous system (SNS and renin-angiotensin system (RAS in rats with adriamycin-induced heart failure. METHODOLOGY/PRINCIPAL FINDING: Heart failure was induced by intraperitoneal injection of adriamycin over a period of 2 weeks (cumulative dose of 15 mg/kg. On day 19, rats received intragastric administration daily with either COX-2 inhibitor celecoxib (CLB or normal saline. Treatment with CLB reduced mortality and attenuated both myocardial atrophy and pulmonary congestion in HF rats. Compared with the HF rats, ventricle to body weight (VW/BW and lung to body weight (LW/BW ratios, heart rate (HR, left ventricular end-diastolic pressure (LVEDP, left ventricular peak systolic pressure (LVPSP and maximum rate of change in left ventricular pressure (LV±dp/dtmax were improved in HF+CLB rats. Angiotensin II (ANG II, norepinephrine (NE, COX-2 and glutamate (Glu in the PVN were increased in HF rats. HF rats had higher levels of ANG II and NE in plasma, higher level of ANG II in myocardium, and lower levels of ANP in plasma and myocardium. Treatment with CLB attenuated these HF-induced changes. HF rats had more COX-2-positive neurons and more corticotropin releasing hormone (CRH positive neurons in the PVN than did control rats. Treatment with CLB decreased COX-2-positive neurons and CRH positive neurons in the PVN of HF rats. CONCLUSIONS: These results suggest that PVN COX-2 may be an intermediary step for PVN neuronal activation and excitatory neurotransmitter release, which further contributes to sympathoexcitation and RAS activation in adriamycin-induced heart failure. Treatment with COX-2 inhibitor attenuates sympathoexcitation and RAS activation in adriamycin-induced heart failure.

  7. Ameliorating Adriamycin-Induced Chronic Kidney Disease in Rats by Orally Administrated Cardiotoxin from Naja naja atra Venom.

    Science.gov (United States)

    Ding, Zhi-Hui; Xu, Li-Min; Wang, Shu-Zhi; Kou, Jian-Qun; Xu, Yin-Li; Chen, Cao-Xin; Yu, Hong-Pei; Qin, Zheng-Hong; Xie, Yan

    2014-01-01

    Previous studies reported the oral administration of Naja naja atra venom (NNAV) reduced adriamycin-induced chronic kidney damage. This study investigated the effects of intragastric administrated cardiotoxin from Naja naja atra venom on chronic kidney disease in rats. Wistar rats were injected with adriamycin (ADR; 6 mg/kg body weight) via the tail vein to induce chronic kidney disease. The cardiotoxin was administrated daily by intragastric injection at doses of 45, 90, and 180  μ g/kg body weight until the end of the protocol. The rats were placed in metabolic cages for 24 hours to collect urine, for determination of proteinuria, once a week. After 6 weeks, the rats were sacrificed to determine serum profiles relevant to chronic kidney disease, including albumin, total cholesterol, phosphorus, blood urea nitrogen, and serum creatinine. Kidney histology was examined with hematoxylin and eosin, periodic acid-Schiff, and Masson's trichrome staining. The levels of kidney podocin were analyzed by Western blot analysis and immunofluorescence. We found that cardiotoxin reduced proteinuria and can improve biological parameters in the adriamycin-induced kidney disease model. Cardiotoxin also reduced adriamycin-induced kidney pathology, suggesting that cardiotoxin is an active component of NNAV for ameliorating adriamycin-induced kidney damage and may have a potential therapeutic value on chronic kidney disease.

  8. RESISTANCE-ASSOCIATED FACTORS IN HUMAN SMALL-CELL LUNG-CARCINOMA GLC(4) SUB-LINES WITH INCREASING ADRIAMYCIN RESISTANCE

    NARCIS (Netherlands)

    VERSANTVOORT, CHM; WITHOFF, S; BROXTERMAN, HJ; KUIPER, CM; SCHEPER, RJ; MULDER, NH; DEVRIES, EGE

    1995-01-01

    Previous studies have shown that the in vitro-selected adriamycin-resistant human small-cell lung-carcinoma cell line GLC(4)A-ADR(150) displays multidrug resistance as the result of 3-fold decreased DNA-topoisomerase II (topo II) activity and a 6-fold reduction in adriamycin accumulation. Not the

  9. Sequential radiotherapy and adriamycin in the management of bronchogenic carcinoma: the question of additive toxicity

    Energy Technology Data Exchange (ETDEWEB)

    Ruckdeschel, J.C.; Baxter, D.H.; McKneally, M.F.; Killam, D.A.; Lunia, S.L.; Horton, J.

    1979-08-01

    Intrapleural immunotherapy, radiotherapy and chemotherapy were employed in that sequence in 22 patients with Stage III non-oat cell bronchogenic carcinoma confined to the thorax. Seven patients received intrapleural BCG in a pilot study and 15 were randomized between intrapleural BCG and intrapleural saline. Isoniazid was begun on day 14 and irradiation (3000 rad in 10 fractions) to the primary lesion, mediastinum and ipsilateral supraclavicular nodes was started on day 21. One to two weeks following irradiation, CAMP chemotherapy was initiated (Cyclophosphamide 300 mg/M/sup 2/ iv, d. 1,8; Adriamycin 20 mg/M/sup 2/ iv, d. 1,8; Methotrexate 15 mg/M/sup 2/ iv, d. 1,8 and Procarbazine 100 mg/M/sup 2/ p.o., d. 1 to 10). Chemotherapy was given for a total of six months. Two patients expired prior to radiotherapy (1 tumor progression, 1 myocardial infarction) and 2 patients were lost to follow-up. Nausea, vomiting, alopecia and fatigue were universal side effects of the chemotherapy. Esophagitis occurred in 9 patients, 7 prior to and 2 after initiation of Adriamycin. In only one case did Adriamycin exacerbate a previous radiation esophagitis. No patient developed clinical radiation pneumonitis, although all had eventual radiation fibrosis. Congestive heart failure occurred in 1 patient with known valvular heart disease and responded to diuretics. Three patients developed localized herpes zoster infections. One patient developed radiation myelitis one year after initiating therapy and six months after completing all chemotherapy. The major side effect was leukopenia with relative platelet sparing. Although significant morbidity was encountered in this primarily older patient population (mean age 64.8 years) recall reactions involving irradiated intrathoracic structures were not a significant clinical problem.

  10. Esophagitis induced by combined radiation and adriamycin. [Mediastinum irradiated to doses between 500 and 2500 rad

    Energy Technology Data Exchange (ETDEWEB)

    Boal, D.K.B.; Newburger, P.E.; Teele, R.L.

    1979-04-01

    With the increasing use of combined chemotherapy and radiotherapy in the treatment of certain types of malignancy, a clinically distinct type of esophagitis has been recognized as an undesirable side effect. It occurs with low doses (less than 2,000 rad) of mediastinal radiation in patients who simultaneously or sequentially receive either adriamycin or actinomycin D. Characteristic of this entity is recall: recurrent episodes of esophagitis with each course of chemotherapy. The radiographic findings are nonspecific, ranging from subtle alterations in motility to severe damage with irreversible stricture formation. The primary differential diagnostic considerations are infectious processes. The radiographic spectrum clinical aspects, and differential diagnoses in five patients are discussed.

  11. Effects of liposome-adriamycin (L-ADM) and thermotherapy on glioma cells: an experimental study

    OpenAIRE

    Zheng-hua SHI; Jian-ning ZHANG

    2013-01-01

    Objective  To observe the effects of liposome-adriamycin (L-ADM) and thermotherapy on proliferation and apoptosis of SWO-38 glioma cells. Methods  The SWO-38 glioma cells were cultivated in vitro. The effects of thermotherapy (43℃), ADM chemotherapy, L-ADM chemotherapy, thermotherapy + ADM chemotherapy, and thermotherapy + L-ADM chemotherapy on the cell proliferation and apoptosis were observed. The working concentration of ADM and L-ADM, and the cell proliferation rate were determined by MTT...

  12. Adriamycin does not affect the repair of X-ray induced DNA single strand breaks

    Energy Technology Data Exchange (ETDEWEB)

    Cantoni, O.; Sestili, P.; Cattabeni, F.

    1985-06-01

    The ability of the antitumor antibiotic adriamycin (Ad) to inhibit the rejoining of DNA single strand breaks produced by X-rays was investigated in cultured cells. Chinese hamster ovary cells were given 400 rad and were allowed to repair in the presence or absence of Ad for 60 min at 37degC. The drug did not affect the ability of cells to repair DNA breaks and residual breaks found after the repair period were attributed to those induced by Ad alone. (author). 16 refs.

  13. Enhanced sialylation of the K 562 cell surface membrane glycoconjugates induced by adriamycin.

    Science.gov (United States)

    Trentesaux, C; Laplace, B; Madoulet, C; Rebel, G; Jardillier, J C

    1987-01-01

    The antitumor agent Adriamycin (ADM) increases the sialic acid content of K 562 cell plasma membrane glycoconjugates. Total and neuraminidase-sensitive sialic acid are enhanced 3 to 4 times when expressed per 10(6) cells. This fact is a consequence of an increase in cell surface and in plasma membrane sialic acid density. Protein-bound and lipid-bound sialic acid are increased in the same way and exhibit the same ratio 90/10. After external radiolabelling by periodide-borotritide and neuraminidase-galactose oxidase-borotritide treatment, only some quantitative changes can be observed. Fractionation of gangliosides by thin layer chromatography gives the same results. Further experiments lead to the following conclusions: the hypersialylation cannot be explained by a G2-block in the cell cycle induced by ADM; it is not a consequence of a differentiation process; it is not observed in a population of adriamycin-resistant K 562 cells and can therefore be considered as a metabolic event linked to the cytotoxic activity of ADM.

  14. The cytotoxicity of mitomycin C and adriamycin in genetically engineered V79 cell lines and freshly isolated rat hepatocytes.

    NARCIS (Netherlands)

    Goeptar, A.R.; te Koppele, J.M.; Glatt, H.R.; Groot, E.J.; Seidel, A.; Barrenscheen, M.; Wölfel, C.; Doehmer, J.; Vermeulen, N.P.E.

    1995-01-01

    The objective of the present study was to investigate the cytotoxicity of Adriamycin (ADR) and mitomycin C (MMC) in tumor and non-tumor cells with respect to the role of cytochrome P450 (P450). Therefore, genetically engineered V79 Chinese hamster fibroblasts expressing only single enzymes of P450

  15. [Adriamycin and mitomycin dose-dependently downregulate X-kinked inhibitor of apoptosis protein in human bladder cancer cells].

    Science.gov (United States)

    Yin, Zhen-fei; Li, Ming; Lai, Yong-qing; Yuan, Yi-ming; Liu, Gang; Chen, Liang; Gan, Lin; Na, Yan-qun

    2006-07-04

    To investigate the efficacy of inducing apoptosis in human bladder cancer cells by adriamycin and mitomycin and relevant mechanism. Human bladder cancer cells of the lines RT4, MGH-U1, FJ, and T24 were cultured. Adriamycin of the concentrations of 0.1, 1, and 10 microg/ml, and mitomycin of the concentrations of 0.01, 0.1, and 1 microg/ml were added into the culture fluid respectively. CCK-8 colorimetric assay was used to detect the survival rates of the cells so as to select the cell line sensitive and tolerable to the drugs. Flow cytometry was used to detect the cell apoptosis. Western blotting was used to detect the levels of X-kinked inhibitor of apoptosis protein (XIAP) and the cleavage of caspase-3 precursor. It was found that RT4 cells were the most sensitive and the T24 cells were the most tolerable to adriamycin and mitomycin. Treated with adriamycin of the concentrations of 0.1, 1, and 10 microg/ml for 24 hours, the apoptotic rates of the RT4 cells were 15.3% +/- 4.3%, 29.3% +/- 6.4%, and 45.0% +/- 5.5% respectively; and the apoptotic rates of the T24 cells were 7.3% +/- 3.1%, 12.5% +/- 4.3%, and 18.2% +/- 6.3% respectively, all significantly lower than those of the RT4 cells (P RT4 cells were 12.7% +/- 2.9%, 31.3% +/- 4.4%, and 48.9% +/- 5.8% respectively, and the apoptotic rates of the RT4 cells were 7.2% +/- 3.3%, 15.5% +/- 5.2%, and 21.2% +/- 4.4% respectively, all significantly lower than those of the RT4 cells (all P cell lines before the adriamycin and mitomycin treatment. After the treatment of adriamycin and mitomycin, the expression of XIAP was down-regulated dose-dependently, however, being weaker in the T24 cells than in the RT4 cells; and caspase-3 precursor cleavage was enhanced, however, being weaker in the T24 cells too. Adriamycin and mitomycin dose-dependently kill the human bladder cancer cells. Such cytotoxic effect may be realized through inducing the cell apoptosis which is associated with the down-regulation of XIAP and cleavage of

  16. Characterization of Adriamycin-resistant and radiation-sensitive Chinese hamster cell lines

    Energy Technology Data Exchange (ETDEWEB)

    Sognier, M.A.; Yin Zhang; Eberle, R.L.; Belli, J.A. (Texas Univ., Galveston, TX (United States). Medical Branch)

    1992-11-03

    A series of cell lines derived from Chinese hamster V79 cells by selection in increasing concentrations of Adriamycin (ADRM) was developed to study the mechanism of drug resistance and its relationship to radiation response. Survival studies revealed that selection in increasingly higher concentrations of ADRM positively correlated with increased cellular drug resistance. Increased cellular resistance correlated positively with amplification of the hamster multidrug-resistance gene (pgp 1) as detected with dot blot analysis using the pCHP1 probe. Southern blot analysis of restriction endonuclease digested DNA showed that (1) some fragments were preferentially amplified compared to others in the ADRM-resistant; and (2) no major gene rearrangement appeared to have occurred during the selection for greater ADRM resistance. (author).

  17. Defatted milled grape seed protects adriamycin-treated hepatocytes against oxidative damage.

    Science.gov (United States)

    Valls-Belles, Victoria; Torres, Mari Carmen; Muñiz, Pilar; Beltran, Sagrario; Martinez-Alvarez, Jesús Roman; Codoñer-Franch, Pilar

    2006-08-01

    Defatted milled grape seed (DMGS) is a wine by-product obtained from the oil extraction of the grape seed that contains different types of phenolic compounds. The present study was designed to evaluate the possible protective effect of DMGS on toxicity induced by adriamycin (ADR) in isolated rat hepatocytes. The study was carried out by examining the results of lactate dehydrogenase (LDH) release to estimate cytotoxicity; the thiobarbituric acid reactant substances (TBARS) and carbonyl group levels were measured as biomarkers of oxidative stress and ATP and GSH levels as estimation of intracellular effect. The results showed that DMGS extract protects the cellular membrane from oxidative damage and consequently prevents protein and lipid oxidation. The levels of ATP and GSH changes for the ADR toxicity were restored to control value in the presence of DMGS extract. The experimental results suggest that this wine by-product may be used to decrease oxidative stress.

  18. The CD40-CD154 co-stimulation pathway mediates innate immune injury in adriamycin nephrosis.

    Science.gov (United States)

    Lee, Vincent W S; Qin, Xiaohong; Wang, Yiping; Zheng, Guoping; Wang, Ya; Wang, Ying; Ince, Jon; Tan, Thian K; Kairaitis, Lukas K; Alexander, Stephen I; Harris, David C H

    2010-03-01

    Blockade of CD40-CD40 ligand (CD154) interactions protects against renal injury in adriamycin nephropathy (AN) in immunocompetent mice. To investigate whether this protection relied on adaptive or cognate immunity, we tested the effect of CD40-CD154 blockade in severe combined immunodeficient (SCID) mice. SCID mice were divided into three groups: normal, AN + hamster IgG (ADR+IgG group) and AN + anti-CD154 antibody (MR1) (ADR+MR1 group). AN was induced by tail vein injection of 5.2 mg/kg of adriamycin (ADR). Hamster IgG (control Ab) or MR1 was administered intraperitoneally on days 5, 7, 9 and 11 after ADR injection. Histological and functional data were collected 4 weeks after ADR injection. In vitro experiments tested the effect of soluble and cell-bound CD154 co-cultured with CD40-expressing cells [macrophages, mesangial cells and renal tubular epithelial cells (RTEC)]. All experimental animals developed nephropathy. Compared to the ADR+IgG group, ADR+MR1 animals had significantly less histological injury (glomerulosclerosis and tubular atrophy) and functional injury (creatinine clearance). Kidneys of ADR+MR1 animals had significantly less macrophage infiltration than those of ADR+IgG animals. Interestingly, expression of CD40 and CD41 (a platelet-specific marker) was significantly less in ADR+MR1 animals compared to ADR+IgG animals. In vitro, CD154 blockade significantly attenuated upregulation of CCL2 gene expression by RTEC stimulated by activated macrophage-conditioned medium. In contrast, platelet-induced upregulation of macrophage and mesangial cell proinflammatory cytokine gene expression were not CD154-dependent. CD40-CD154 blockade has a significant innate renoprotective effect in ADR nephrosis. This is potentially due to inhibition of macrophage-derived soluble CD154.

  19. Lingzhilactones from Ganoderma lingzhi ameliorate adriamycin-induced nephropathy in mice.

    Science.gov (United States)

    Yan, Yong-Ming; Wang, Xin-Long; Zhou, Li-Li; Zhou, Feng-Jiao; Li, Rong; Tian, Yuan; Zuo, Zhi-Li; Fang, Ping; Chung, Arthur C K; Hou, Fan-Fan; Cheng, Yong-Xian

    2015-12-24

    Several Ganoderma fungi are well-known for their medical uses to treat cancer, insomnia and kidney disease in East Asia. Triperpenoids and polysaccharides have been considered for a long time to be the major active components of the genus Ganoderma. The present study is to examine the effects of lingzhilactones from G. lingzhi on adriamycin-induced nephropathy in mice. A combination of various chromatography led to the isolation of lingzhilactones A-C, their structures were identified by spectroscopic and computational methods. The intracellular reactive oxygen species (ROS) was detected with the carboxymethyl-H2-dichlorofluorescein diacetate fluoroprobe. The fibrotic markers were analyzed by real-time RT-PCR and Western blot analyses. Detection of SEAP was conducted with the chemiluminescent. Urine albumin was measured using an ELISA assay. Histology and immunohistochemical staining was used to assess fibrotic lesions in mice. Three new lingzhilactones A-C (1-3) containing a fused lactone moiety were isolated from G. lingzhi. We found that 2 could inhibit ROS generation in a dose-dependent manner, inhibit mRNA expression of collagen IV, fibronectin, IL-6 and increase expression of Nrf2 in rat tubular epithelial cells. Furthermore, we found that 2 could reduce urinary albumin levels, abrogate myofibroblastic activation and inhibit the phosphorylation of Smad3 in adriamycin-induced mice. The in vitro and in vivo results suggested that lingzhilactone B could protect against renal injuries by increasing the activities of antioxidants and inhibiting inflammation. The inhibition of Smad3 phosphorylation suggested that this substance displays in vivo antifibrotic activity by a mechanism that is dependent on disruption of Smad3. These results promote understanding of the traditional usage of G. lingzhi and provide promising findings which may be beneficial for anti-kidney disease drug design. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

  20. Inositol hexaphosphate (IP6) enhances the anti-proliferative effects of adriamycin and tamoxifen in breast cancer.

    Science.gov (United States)

    Tantivejkul, Kwanchanit; Vucenik, Ivana; Eiseman, Julie; Shamsuddin, AbulKalam M

    2003-06-01

    The current treatment of breast carcinomas recognizes the importance of combination therapy in order to increase efficacy and decrease side effects of conventional chemotherapy. Inositol hexaphosphate (IP6), a naturally occurring polyphosphorylated carbohydrate, has shown a significant anti-cancer effect in various in vivo and in vitro models, including breast cancer. In this study, we investigated the in vitro growth inhibitory activity of IP6 in combination with adriamycin or tamoxifen, against three human breast cancer cell lines: estrogen receptor (ER) alpha-positive MCF-7, ER alpha-negative MDA-MB 231 and adriamycin-resistant MCF-7 (MCF-7/Adr) using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Much lower concentrations of IP6 were required after 96 h of treatment to inhibit the growth of MCF-7/Adr cells than MCF-7 cells; the IC50 for MCF-7/Adr cells was 1.26 mM compared to 4.18 mM for MCF-7 cells. The ER-negative MDA-MB 231 cells were also highly sensitive to IP6 with IC50 being 1.32 mM. To determine the effects of IP6 in combination with either adriamycin or tamoxifen, the median effect principle and Webb's fraction method were used to determine the combination index (CI) and the statistical differences. Growth suppression was markedly increased when IP6 was administered prior to the addition of adriamycin, especially against MCF-7 cells (CI = 0.175 and p < 0.0001). Synergism was also observed when IP6 was administered after tamoxifen in all three cell lines studied (CI = 0.343, 0.701 and 0.819; p < 0.0001, p = 0.0003 and 0.0241 for MCF-7/Adr, MCF-7 and MDA-MB 231, respectively). The growth of primary culture of breast cancer cells from patients was inhibited by IP6 with LC50 values ranging from 0.91 to 5.75 mM (n = 10). Our data not only confirm that IP6 alone inhibits the growth of breast cancer cells; but it also acts synergistically with adriamycin or tamoxifen, being particularly effective against ER alpha-negative cells

  1. A study of adriamycin-reduced wound breaking strenght in rats. An evaluation by light and electron microscopy, induction of collagen maturation, and hydroxyproline content.

    Science.gov (United States)

    Devereux, D F; Triche, T J; Webber, B L; Thibault, L E; Brennan, M F

    1980-06-01

    The cause of the reduced wound breaking strength (WBS) in adriamycin-treated animals is unknown. Differential staining of histologic sections, collagen fiber diameter measurements by electron microscopy (EM), induction of maturation, and hydroxyproline content analysis were used to examine this defect. Differential staining and formaldehyde induction of maturation revealed no differences between mature and immature collagen content in scars of adriamycin-treated and control animals. Mean collagen fiber diameters in control rats were 76 +/- 27 nm and, in adriamycin treated rats, 62 +/- 10 nm (mean +/- SD) at 21 days. There was no difference in total hydroxyproline content between ADR and C animals. However, significant differences existed between the specific activity of new or 3H-hydroxyproline (scar collagen) at 14 days (controls, 372 +/- 9 cpm; adriamycin-treated, 129 +/- 5 cpm) and at 21 days (controls, 365 +/- 11 cpm; adriamycin treated, 172 +/- 14 cpm; mean +/- SEM; P less than 0.001). It appears that the defect contributing to reduced WBS in adriamycin treated animals is not due to a collagen maturation defect but rather to a reduction in scar collagen accumulation as measured by new hydroxyproline content and reduced fiber diameter as determined by EM measurements.

  2. Neoadjuvant Chemotherapy with Ifosfamide, Cisplatin, Adriamycin and Mitomycin (IMAP for High risk Adult Soft Tissue Sarcomas

    Directory of Open Access Journals (Sweden)

    Mohagheghi Mohammad Ali

    2009-05-01

    Full Text Available To define efficacy of pre-operative chemotherapy in down staging of advanced non-round cell soft tissue sarcomas. From Sep 2002 to Dec 2005, 70 patients were treated by Ifosfamid, MESNA, cisplatin, adriamycin, mitomycin and subsequent surgery. Postoperatively, patients received radiotherapy in cases of microscopically incomplete resection or local recurrence. The median age of the patients was 34 years and the median tumor size was 14 cm. According to AJCC classification 46 patients had stage 3 and 24 had stage 4 diseases. The most common subtypes were MFH and leiomyosarcoma. The most common sites of tumors were lower extremity and trunk. Toxicity grades three or higher consisted of nausea, Leucopenia and infection. About 50% of the patients received G-CSF. Response to chemotherapy was assessable in 63 patients; 9 patients achieved complete response and 16 showed partial response. Disease progressed in 8 and did not change in 37. The best response was seen with MFH, fibrosarcoma and synovial sarcoma. After chemotherapy seventy percent of patients underwent complete surgery. Disease relapsed in 41 patients and twenty two patients died of metastasis. Median survival of patients was 30 months. IMAP plus G-CSF is safe and effective as preoperative chemotherapy in some subtypes of sarcomas, although the metastasis problem has not been eliminated

  3. Pristimerin overcomes adriamycin resistance in breast cancer cells through suppressing Akt signaling

    Science.gov (United States)

    XIE, GUI'E; YU, XINPEI; LIANG, HUICHAO; CHEN, JINGSONG; TANG, XUEWEI; WU, SHAOQING; LIAO, CAN

    2016-01-01

    Breast cancer remains a major public health problem worldwide. Chemotherapy serves an important role in the treatment of breast cancer. However, resistance to chemotherapeutic agents, in particular, multi-drug resistance (MDR), is a major cause of treatment failure in cancer. Agents that can either enhance the effects of chemotherapeutics or overcome chemoresistance are urgently needed for the treatment of breast cancer. Pristimerin, a quinonemethide triterpenoid compound isolated from Celastraceae and Hippocrateaceae, has been shown to possess antitumor, anti-inflammatory, antioxidant and insecticidal properties. The aim of the present study was to investigate whether pristimerin can override chemoresistance in MCF-7/adriamycin (ADR)-resistant human breast cancer cells. The results demonstrated that pristimerin indeed displayed potent cytocidal effect on multidrug-resistant MCF-7/ADR breast cancer cells, and that these effects occurred through the suppression of Akt signaling, which in turn led to the downregulation of antiapoptotic effectors and increased apoptosis. These findings indicate that use of pristimerin may represent a potentially promising approach for the treatment of ADR-resistant breast cancer. PMID:27123073

  4. Cobrotoxin from Naja naja atra Venom Ameliorates Adriamycin Nephropathy in Rats

    Directory of Open Access Journals (Sweden)

    Shu-Zhi Wang

    2015-01-01

    Full Text Available Chronic kidney disease (CKD becomes a global health problem with high morbidity and mortality. Adriamycin- (ADR- induced rodent chronic nephropathy is a classic experimental model of human minimal lesion nephrotic syndrome. The present study investigated the effect of cobrotoxin (CTX on ADR-induced nephropathy. Rats were given 6 mg/kg ADR once through the tail vein to replicate ADR nephropathy model. CTX was administered to rats daily by placing a fast dissolving CTX membrane strip under the tongue starting from 5 days prior to ADR administration until the end of experiment. The results showed that CTX ameliorated the symptoms of ADR nephropathy syndrome with reduced body weight loss, proteinuria, hypoalbuminemia, dyslipidemia, serum electrolyte imbalance, oxidative stress, renal function abnormities, and kidney pathological lesions. Anti-inflammatory cytokine IL-10 expression was elevated after CTX administration in ADR nephropathy model. CTX inhibited the phosphorylation of IκB-α and NF-κB p65 nuclear translocation. Meanwhile, CTX upregulated the protein level of podocyte-specific nephrin and downregulated the level of fibrosis-related TGF-β. These findings suggest that CTX may be a potential drug for chronic kidney diseases.

  5. Effects of liposome-adriamycin (L-ADM and thermotherapy on glioma cells: an experimental study

    Directory of Open Access Journals (Sweden)

    Zheng-hua SHI

    2013-03-01

    Full Text Available Objective  To observe the effects of liposome-adriamycin (L-ADM and thermotherapy on proliferation and apoptosis of SWO-38 glioma cells. Methods  The SWO-38 glioma cells were cultivated in vitro. The effects of thermotherapy (43℃, ADM chemotherapy, L-ADM chemotherapy, thermotherapy + ADM chemotherapy, and thermotherapy + L-ADM chemotherapy on the cell proliferation and apoptosis were observed. The working concentration of ADM and L-ADM, and the cell proliferation rate were determined by MTT method. The apoptotic rate was determined by flow cytometry. Results  The proliferation inhibition rate of thermotherapy + L-ADM chemotherapy and thermotherapy + ADM chemotherapy was 80.16%±3.78% and 62.09%±3.05%, respectively, and it was significantly higher than that of L-ADM chemotherapy (40.27%±2.32%, ADM chemotherapy (30.56%±2.03% or thermotherapy (16.51%±1.26%, P<0.05, and the proliferation inhibition rate of thermotherapy + L-ADM chemotherapy was higher than that of thermotherapy + ADM chemotherapy (P<0.05. The apoptotic rate of thermotherapy + L-ADM chemotherapy and thermotherapy + ADM chemotherapy was 84.19%±2.69% and 60.29%±1.47%, respectively, and it was significantly higher than that of L-ADM chemotherapy (46.72%±2.09%, ADM chemotherapy (35.09%±1.46% and thermotherapy (17.85%±0.78%, P<0.05, and the apoptotic rate of thermotherapy + L-ADM chemotherapy was higher than that of thermotherapy + ADM chemotherapy (P<0.05. Conclusion  Thermotherapy can enhance proliferation inhibition and apoptosis induction effect of ADM and L-ADM on SWO-38 glioma cells, and this effect is even stronger with L-ADM.

  6. Influence of carvedilol on chronic renal failure progression in spontaneously hypertensive rats with adriamycin nephropathy.

    Science.gov (United States)

    Jovanovic, D; Jovovic, D; Mihailovic-Stanojevic, N; Miloradovic, Z; Dimitrijevic, J; Maksic, N; Djukanovic, L

    2005-06-01

    In this study, the effects of carvedilol, antihypertensive (alpha-beta blocker) agent with antiproliferative and antioxidative properties, on slowing down of chronic renal failure (CRF) progression in spontaneously hypertensive rats (SHR) with adriamycin (ADR) nephropathy were examined. Eighty adult (24 weeks) SHR were divided into four groups: 20 SHR; ADR group: 20 SHR treated with ADR (2 mg/kg i.v. twice in 20 days); ADR-C group: 20 SHR treated with ADR and with carvedilol (30 mg/kg/day); ADR-CC group: 20 SHR treated with carvedilol and captopril (60 mg/kg/day). Systolic blood pressure was measured every two weeks, renal blood flow (RBF), mean arterial pressure (MAP) and renal vascular resistance (RVR) were determined at Weeks 6 and 12, creatinine clearance and proteinuria at Weeks -3 (see measurements), 6 and 12. The rats were sacrificed at Weeks 6 and 12 after the second ADR injection. Glomerular sclerosis, tubulointerstitial and blood vessel changes were determined by semiquantitative scoring. Carvedilol decreased systolic blood pressure. It decreased RVR and MAP, and increased RBF significantly. Carvedilol also significantly decreased interstitial infiltration in the early phase of the study, slowed down the development of interstitial fibrosis and tubular atrophy and decreased blood vessel changes. The hemodynamic and morphological effects of carvedilol were associated with slowing down the CRF progression as well as a mild decrease in proteinuria. Captopril addition to carvedilol improved its effects especially on prevention of tubulointerstitial changes. Results of this experimental study showed beneficial effect of carvedilol and its combination with captopril on CRF progression, indicating that clinical studies are warranted.

  7. The effect of adriamycin on dentinogenesis and 3H-thymidine incorporation into the enamel organ of the rat incisor.

    Science.gov (United States)

    Karim, A C

    1990-01-01

    The effect of adriamycin (5 mg/kg) on 3H-thymidine incorporation and on dentin formation was studied in rat incisors. Male Sprague Dawley rats received an intravenous injection of adriamycin. Some of these also received a subcutaneous injection of 3H-thymidine at a dose of 2 mCi/kg one day later. One group of control animals received an intravenous injection of a volume of physiological saline equal to that of the adriamycin dose. Another group received physiological saline, and one hour later was given an additional injection of 3H-thymidine at a similar dose as above. All the animals were killed by perfusion with 2.5% phosphate buffered glutaraldehyde 1 h, 1 d, 4 d, 8 d, 16 d, 28 d, and 32 d after 3H-thymidine treatment. Light microscopy revealed irregular dentin deposits between the mantle and circumpulpal layer of the labial dentin at 16 d. Within these deposits were trapped cells. The latter, through radioautographic labelling, appeared to be cells from the odontoblast layer. Also, the labelling pattern of the enamel organ in both the control and experimental groups indicated that the eruption rate of the tooth was not affected. Serial sectioning and examination of the lingual portion of the incisors at 28 d revealed a lack of dentin formation and a failure in the closure of the apical foramen. Electron microscopic observations showed an irregular and random arrangement of collagen fibers within the deposits of irregular dentin, and the presence of twisted odontoblastic processes. Examination of the lingual surface showed the presence of fibroblasts and collagen fibers bridging the gap that resulted from the failure in dentin formation. These cells, which were similar to periodontal ligament cells, appeared to have arisen from that area. These results indicate that adriamycin has no effect on tooth eruption, but has a reversible effect on the function of secretory odontoblasts, which manifested itself as a periodic deposition of irregular dentin on the labial

  8. Adriamycin activity's durational governance of different cell death types and zonality in rat liver acinus. Immunohistochemical studies

    Directory of Open Access Journals (Sweden)

    Pedrycz Agnieszka

    2014-03-01

    Full Text Available The aim of this study was to develop and examine a model of apoptosis and necrosis of hepatocytes induced by a damaging factor - adriamycin, correlating time after its administration with cell death type, and to investigate the localisation within the liver acinus of hepatocytes dying in these two ways. The results obtained in the present and previous studies were compared in order to make a map of cell death localisation in the liver acinus, showing the effect of time in action and dose of adriamycin. The experiment was performed on 32 female Wistar rats, divided into four groups: I and II - experimental, and III and IV - control. Adriamycin (3 mg/kg b.w. was administered intraperitoneally to rats in groups I and II, and the rats were decapitated after four (group I and eight (group II weeks. Animals in control groups III and IV were given 0.5 mL of 0.9% NaCl solution, and decapitated after four and eight weeks respectively. Sections of the liver were examined with a three-stage immunohistochemical method. This method allowed to examine hepatocytes qualitatively and quantitatively for the presence of proteins involved in three types of apoptosis: induced by the mitochondrial pathway (caspase 3, 9, the intrinsic pathway related to endoplasmic reticulum stress (caspase 3, 12, and the extrinsic pathway (caspase 3, 8. One of the inflammatory markers, caspase 1, was also examined. The zonal localisation of all three types of apoptosis was assessed in the liver tissue. More oxidated hepatocytes indicated only signs of the internal mitochondrial pathway, whereas less oxidated hepatocytes induced the internal reticular pathway and the external apoptotic pathway. The period between adriamycin administration and hepatic cell investigation was a main factor of the process. A longer period post insult resulted in a more pronounced effect of the activation of apoptosis. Sections explored eight weeks after treatment with different doses of the drug (3 and 5

  9. Adriamycin-induced oxidative stress is prevented by mixed hydro-alcoholic extract of Nigella sativa and Curcuma longa in rat kidney.

    Science.gov (United States)

    Mohebbati, Reza; Shafei, Mohammad Naser; Soukhtanloo, Mohammad; Mohammadian Roshan, Noema; Khajavi Rad, Abolfazl; Anaeigoudari, Akbar; Hosseinian, Sara; Karimi, Sareh; Beheshti, Farimah

    2016-01-01

    Inflammation and oxidative stress is considered to have a crucial role in induction of nephropathy. Curcuma longa (C. longa) and Nigella sativa (N. sativa) have anti-inflammatory and antioxidant effects. This study was designed to investigate the effect of mixed hydro-alcoholic extract of N.sativa and C. longa on the oxidative stress induced by Adriamycin (ADR) in rat kidney. The animals were divided into 6 groups: control (CO), ADR, Adriamycin+ Vitamin C (ADR+VIT C), C. longa extract+ Adriamycin (C.LE+ADR), N. sativa extract+ Adriamycin (N.SE+ADR) and C. longa extract+ N. sativa extract + Adriamycin (N.S+C.L+ADR). ADR (5mg/kg) was injected intravenously, whereas VITC (100mg/kg) and extract of C. longa (1000mg/kg) and N. sativa (200mg/kg) were administrated orally. Finally, the renal tissue, urine and blood samples were collected and submitted to measure of redox markers, osmolarity and renal index. The renal content of total thiol and superoxide dismutase (SOD) activity significantly decreased and Malondialdehyde (MDA) concentration increased in Adriamycin group compared to control group. The renal content of total thiol and SOD activity significantly enhanced and MDA concentration reduced in treated-mixed extract of C. longa and N. sativa along with ADR group compared to ADR group. The mixed extract did not restore increased renal index percentage induced by ADR. There also was no significant difference in urine and serum osmolarity between the groups. hydro-alcoholic extracts of N.sativa and C.longa led to an improvement in ADR-induced oxidative stress and mixed administration of the extracts enhanced the aforementioned therapeutic effect.

  10. Therapeutic efficacy of bone marrow derived mesenchymal stromal cells versus losartan on adriamycin-induced renal cortical injury in adult albino rats.

    Science.gov (United States)

    Anan, Hoda H; Zidan, Rania A; Shaheen, Mohammad A; Abd-El Fattah, Enas A

    2016-08-01

    Renal disease is a major health problem. Recent studies have reported the efficacy of stem cell therapy in nephropathy animal models. This study was designed to investigate the therapeutic effectiveness of bone marrow-derived mesenchymal stromal cells (MSCs) versus losartan in the treatment of renal alterations induced by adriamycin (ADR). Thirty-five adult male albino rats were divided into four groups. Group I was the control group. Group II (adriamycin-treated group),which included ten rats that were injected with a single dose of adriamycin (15 mg/kg) intraperitoneally, was subdivided into subgroup IIa and IIb and they were sacrificed 1 week and 5 weeks after adriamycin injection, respectively. Group III was the adriamycin + losartan-treated group and 1 week after adriamycin injection five rats received 10 mg/kg of losartan orally and daily for 4 weeks. Group IV was the adriamycin + MSC-treated group); five rats were injected with adriamycin as group II then supplied with MSCs at a dose of 1 × 10(6) cells suspended in 0.5 mL of phosphate-buffered saline (PBS) per rat in the tail vein 1 week after adriamycin injection. Rats of this group were sacrificed 4 weeks after the stem cell injection. Blood urea nitrogen and serum creatinine were measured. Samples from renal cortex were processed for light and electron microscope examination. As regards light microscope, sections were stained with hematoxylin and eosin (H-E), periodic acid-Schiff (PAS), masson trichrome, proliferating cell nuclear antigen (PCNA) and Caspase-3 immunohistochemical stains. Morphometrical and statistical analyses were also conducted. Examination of adriamycin-treated group revealed deterioration of renal functions and various degrees of renal structural alterations as vacuolated cytoplasm, dark nuclei and detached epithelial lining. Administration of losartan partially improved ADR-induced kidney dysfunction, whereas MSCs denoted a more ameliorative role evidenced by

  11. Reduction of proteinuria in adriamycin-induced nephropathy is associated with reduction of renal kidney injury molecule (Kim-1) over time

    NARCIS (Netherlands)

    Kramer, Andrea B.; van Timmeren, Mirjan M.; Schuurs, Theo A.; Vaidya, Vishal S.; Bonventre, Joseph V.; van Goor, Harry; Navis, Gerjan

    Kramer AB, van Timmeren MM, Schuurs TA, Vaidya VS, Bonventre JV, van Goor H, Navis G. Reduction of proteinuria in adriamycin-induced nephropathy is associated with reduction of renal kidney injury molecule (Kim-1) over time. Am J Physiol Renal Physiol 296: F1136-F1145, 2009. First published February

  12. A randomized phase 3 study on the effect of thalidomide combined with adriamycin, dexamethasone, and high-dose melphalan, followed by thalidomide maintenance in patients with multiple myeloma.

    NARCIS (Netherlands)

    Lokhorst, H.M.; Holt, B. van der; Zweegman, S.; Vellenga, E.; Croockewit, S.; Oers, M.H. van; Borne, P. von dem; Wijermans, P.; Schaafsma, R.; Weerdt, O. de; Wittebol, S.; Delforge, M.; Berenschot, H.; Bos, G.M.; Jie, K.S.; Sinnige, H.; Marwijk-Kooy, M. van; Joosten, P.; Minnema, M.C.; Ammerlaan, R. van; Sonneveld, P.

    2010-01-01

    The phase 3 trial HOVON-50 was designed to evaluate the effect of thalidomide during induction treatment and as maintenance in patients with multiple myeloma who were transplant candidates. A total of 556 patients was randomly assigned to arm A: 3 cycles of vincristine, adriamycin, and

  13. A randomized phase 3 study on the effect of thalidomide combined with adriamycin, dexamethasone, and high-dose melphalan, followed by thalidomide maintenance in patients with multiple myeloma

    NARCIS (Netherlands)

    Lokhorst, Henk M.; van der Holt, Bronno; Zweegman, Sonja; Vellenga, Edo; Croockewit, Sandra; van Oers, Marinus H.; von dem Borne, Peter; Wijermans, Pierre; Schaafsma, Ron; de Weerdt, Okke; Wittebol, Shulamiet; Delforge, Michel; Berenschot, Henriëtte; Bos, Gerard M.; Jie, Kon-Siong G.; Sinnige, Harm; van Marwijk-Kooy, Marinus; Joosten, Peter; Minnema, Monique C.; van Ammerlaan, Rianne; Sonneveld, Pieter

    2010-01-01

    The phase 3 trial HOVON-50 was designed to evaluate the effect of thalidomide during induction treatment and as maintenance in patients with multiple myeloma who were transplant candidates. A total of 556 patients was randomly assigned to arm A: 3 cycles of vincristine, adriamycin, and

  14. Induction therapy with vincristine, adriamycin, dexamethasone (VAD) and intermediate-dose melphalan (IDM) followed by autologous or allogeneic stem cell transplantation in newly diagnosed multiple myeloma

    NARCIS (Netherlands)

    Lokhorst, H. M.; Sonneveld, P.; Cornelissen, J. J.; Joosten, P.; van Marwijk Kooy, M.; Meinema, J.; Nieuwenhuis, H. K.; van Oers, M. H.; Richel, D. J.; Segeren, C. N.; Veth, G.; Verdonck, L. F.; Wijermans, P. W.

    1999-01-01

    We performed a phase II study to test the efficacy and feasibility of induction therapy with vincristine, adriamycin and dexamethasone (VAD) and intermediate-dose melphalan, 70 mg/m2 (IDM), to autologous or allogeneic stem cell transplantation in newly diagnosed multiple myeloma (MM). A total of 77

  15. A randomized phase 3 study on the effect of thalidomide combined with adriamycin, dexamethasone, and high-dose melphalan, followed by thalidomide maintenance in patients with multiple myeloma

    NARCIS (Netherlands)

    H.M. Lokhorst (Henk); B. van der Holt (Bronno); S. Zweegman (Sonja); E. Vellenga (Edo); S. Croockewit (Sandra); M.H.J. van Oers (Marinus); P.A. von dem Borne (P. A.); P.W. Wijermans (Pierre); R. Schaafsma (Ron); O. de Weerdt (Okke); S. Wittebol (Shulamit); M. Delforge (Michel); H. Berenschot (Henriëtte); G.M. Bos (Gerard); K.S-G. Jie; H. Sinnige (Harm); M. van Marwijk Kooy (Marinus); P. Joosten (Peter); M.C. Minnema (Monique); R.A.H.M. Ammerlaan (Rianne); P. Sonneveld (Pieter)

    2010-01-01

    textabstractThe phase 3 trial HOVON-50 was designed to evaluate the effect of thalidomide during induction treatment and as maintenance in patients with multiple myeloma who were transplant candidates. A total of 556 patients was randomly assigned to arm A: 3 cycles of vincristine, adriamycin, and

  16. Adverse Renal Effects of the AGE Inhibitor Pyridoxamine in Combination with ACEi in Non-Diabetic Adriamycin-Induced Renal Damage in Rats

    NARCIS (Netherlands)

    Waanders, Femke; van Goor, Harry; Navis, Gerjan

    2008-01-01

    Background/Aims: Advanced glycation end products (AGEs) are involved in diabetic nephropathy. The AGE inhibitor pyridoxamine (PM) is renoprotective in experimental chronic allograft nephropathy supporting its potential in non-diabetic renal damage. Methods: We studied the effects of PM in adriamycin

  17. Interactions of radiation and adriamycin, bleomycin, mitomycin C or cis-diamminedichloroplatinum II in intestinal crypt cells

    DEFF Research Database (Denmark)

    von der Maase, H

    1984-01-01

    The interactions of radiation and adriamycin (ADM), bleomycin (BLM), mitomycin C (MM-C), or cis-diamminedichloroplatinum II (cis-DDP) in mouse jejunal crypt cells were studied using the microcolony survival assay. ADM administered from 24 h before to 48 h after irradiation resulted in an almost...... constant enhancement of the radiation response, the dose effect factor (DEF) being 1.19. The effect of BLM was extremely dependent on the sequence and interval between drug administration and irradiation. The most pronounced effect was observed when BLM was given 2 h before irradiation (DEF = 2.......40), at which interval the D0 surprisingly increased by a factor of 1.4. Administration of MM-C from 24 h before to 24 h after irradiation enhanced the radiation response. The effect peaked on administration 6 h before irradiation (DEF = 1.21) and diminished by application after irradiation. Cis-DDP enhanced...

  18. [Antitumor effect of recombinant Xenopus laevis vascular endothelial growth factor (VEGF) as a vaccine combined with adriamycin on EL4 lymphoma in mice].

    Science.gov (United States)

    Niu, Ting; Liu, Ting; Jia, Yong-Qian; Liu, Ji-Yan; Wu, Yang; Hu, Bing; Tian, Ling; Yang, Li; Kan, Bing; Wei, Yu-Quan

    2005-09-01

    To explore the antitumor effect of immunotherapy with recombinant Xenopus laevis vascular endothelial growth factor (xVEGF) as a vaccine combined with adriamycin on lymphoma model in mice. EL4 lymphoma model was established in C57BL/6 mice. Mice were randomized into four groups: combination therapy, adriamycin alone, xVEGF alone and normal saline (NS) groups, and then were given relevant treatments. The growth of tumor, the survival rate of tumor-bearing mice, and the potential toxicity of regimens above were observed. Anti-VEGF antibody-producing B cells (APBCs) were detected by enzyme-linked immunospot (ELISPOT) assay. In addition, microvessel density (MVD) of tumor was detected by immunohistochemistry, and tumor cell apoptosis was also detected by TUNEL staining. The tumor volumes of mice were significantly smaller in combination group than those in other three groups (P < 0.05). Complete regression of tumor was observed in 3 of 10 mice in combination group. Forty-eight days after inoculation of tumor cells, the survival rate of mice was significantly higher in combination group than in NS group (P < 0.01). The anti-VEGF APBC count in combination group or xVEGF group was significantly higher, compared with that in adriamycin group or NS group (P < 0.01). MVD in tumor tissues was significantly lower in combination group than those in other three groups (P < 0.05). Moreover, tumor cell apoptosis was significantly higher in combination group than those in other three groups (P < 0.05). In this experimental study, the use of xVEGF vaccine and adriamycin as a combination of immunotherapy with chemotherapy has sucessfully produced synergistic antitumor effect on lymphoma in mice.

  19. [Gene expressions of xylosyltransferase and heparanase in renal tissue of rat with adriamycin nephropathy and relevance for proteinuria].

    Science.gov (United States)

    Luo, Wei; Wang, Zheng

    2007-11-01

    To evaluate the roles of P-D-xylosyltransferase I (XT-I) and beta-D-endoglycosidase heparanase (Hpa) in renal tissue with the development of adriamycin (ADR) nephropathy and relevance for proteinuria. 150-200 g Sprague-Dawley rats (n=10 per group) were used to make the nephropathy model induced by tail intravenous injection of 6 mg/kg ADR. Rats were housed in metabolic cage for 24 hours so as to collect the urine prior to disease induced and at day 7, 14 and 21 following disease induction. By using the method of reverse transcriptase-PCR (RT-PCR), XT- I and Hpa genes from renal tissue of these groups were assayed respectively. (1) Rats with nephropathy at day 7, 14 and 21 showed the marked up-regulated XT- I mRNA and the significant difference in contrast to the normal rats,and rats at day 21 showed the marked up-regulated XT- I mRNA and significant difference in contrast to nephropathy rats at day 7. There was a positive linear correlation between the expression level of XT- I mRNA from the renal tissue of nephropathy rats and the quantity of urinary protein (r = 0.760, P < 0.05). (2) The nephropathy rats at day 7, 14 and 21 showed marked up-regulated Hpa mRNA and significant difference in contrast to the normal rats,the rats at day 14 and 21 showed marked up-regulated Hpa mRNA and significant difference in contrast to the rats at day 7. There was a positive linear correlation between the expression level of Hpa mRNA from renal tissue and quantity of rat urinary protein (r = 0.757, P < 0.05). The up-regulated expressions of XT- I and Hpa mRNA in rat renal tissue exist in Adriamycin nephropathy. Higher Hpa mRNA expression, more quantity of urinary protein;more quantity of urinary protein,higher XT-I mRNA expression.

  20. Phase II trial on cisplatin-adriamycin-paclitaxel combination as neoadjuvant chemotherapy for locally advanced cervical adenocarcinoma.

    Science.gov (United States)

    Lorusso, Domenica; Ramondino, Stefano; Mancini, Maria; Zanaboni, Flavia; Ditto, Antonino; Raspagliesi, Francesco

    2014-05-01

    Neoadjuvant chemotherapy (NACT) followed by surgery is a different therapeutic approach to locally advanced cervical adenocarcinoma (LACA) and seems to offer specific advantages over chemoradiation. This phase II trial was designed to evaluate the toxicity and activity of NACT with cisplatin-adriamycin-paclitaxel (TAP) in patients with LACA. Patients with International Federation of Gynecology and Obstetrics stage IB2-IIB uterine adenocarcinoma were treated with NACT TAP for 3 cycles. After the last cycle, patients underwent radical surgery with lymph node dissection. Pathological response was classified as no residual tumor (pCR), residual disease with less than 3-mm stromal invasion (pR1), or residual disease with more than 3-mm stromal invasion (pR2). Between 2003 and 2010, 30 women were enrolled. Fourteen complete clinical responses, 10 partial responses, and 6 stabilizations of disease were registered. Three patients achieved a pCR, 6 a pR1 response, and 21 a pR2 response. At a median follow-up of 45 months, progression-free survival and overall survival were 37 and 48 months, respectively. Hematologic toxicity was the most relevant adverse effect. The TAP combination seems to be feasible with an acceptable toxicity profile and a promising response rate for the treatment of LACA.

  1. In vivo tumouricidal effect of T lymphocytes activated by liposomes containing adriamycin on chemically-induced rat malignant fibrous histiocytoma.

    Science.gov (United States)

    Yakushiji, T; Yonemura, K; Nishida, K; Takagi, K

    1997-01-01

    The augmentative effect of liposomes containing adriamycin (LADM) in the host-tumour immune mechanism was assessed using 9,10-dimethyl-1,2-benzanthracene induced rat malignant fibrous histiocytoma (MFH). The antitumour effect of LADM was analyzed using a double grafted tumour system in which F344 rats first received simultaneous s.c. inoculations of MFH cells in both right and left flanks and were then injected with 0.2 mg of LADM into the right tumour on Day 10, 12, and 14. The growth of a remote, non-treated tumour was strongly inhibited, and the infiltration of CD8+ or CD4+ cells at the tumour periphery was histologically revealed. This inhibition was not observed in F344 nu/nu athymic rats. Winn neutralizing assay with T cell-rich splenic lymphocytes from each drug-treated MFH-bearing rat showed that complete regression of the tumour at a low effector/target ratio occurred only in the LADM-treated group. Furthermore, the tumouricidal effects were demonstrated in coexistence with CD8+ cells and CD4+ cells by assay with FACS sorting splenic lymphocytes. These results strongly suggest that intratumoural administration of LADM caused the systemic augmentation of the MFH-bearing host immune mechanism, and that the augmented response after LADM treatment was induced by the cytotoxic CD8+ lymphocytes dependent on the CD4+ lymphocytes.

  2. Quantitative histological analysis of SM22α (transgelin) in an adriamycin-induced focal segmental glomerulosclerosis model.

    Science.gov (United States)

    Wang, Xingzhi; Sakatsume, Minoru; Sakamaki, Yuichi; Inomata, Shigeru; Yamamoto, Tadashi; Narita, Ichiei

    2012-01-01

    SM22α, transgelin, has been revealed to be specifically expressed in glomerular epithelial cells and interstitial cells, according to the nature of the renal injury. In this study, quantitative analyses of SM22α positivity were performed to investigate the pathological significance of its expression. Kidney samples of adriamycin nephropathy underwent immunohistochemistry with a newly established anti-SM22α monoclonal antibody. The SM22α positivity was quantified by an image analyzer. The correlation of the histological values with biochemical data was investigated statistically. Microstructural localization of SM22α was studied by immunoelectron microscopy. SM22α was expressed along the dense basal microfilaments of degenerating podocytes, and diffusely in interstitial cells. Both the extent and intensity of SM22α expression in glomerular and tubulointerstitial area were correlated with the deterioration of renal function and the severity of proteinuria. Stepwise multiple linear regression analysis revealed that the extent of its positivity in glomerular or tubulointerstitial area was the determinant of the amount of proteinuria or the deterioration of creatinine clearance (Ccr), respectively. Inversely, the deterioration of Ccr was the most important predictor of SM22α expression. SM22α expression in podocytes and interstitial cells represented the severity of proteinuria and the deterioration of renal function. SM22α expression in renal tissues might be a hallmark of kidney diseases. Copyright © 2011 S. Karger AG, Basel.

  3. Therapeutic effect of ozone and rutin on adriamycin-induced testicular toxicity in an experimental rat model.

    Science.gov (United States)

    Salem, E A; Salem, N A; Hellstrom, W J

    2017-02-01

    To evaluate the cytoprotective effects of rutin, ozone and their combination on adriamycin (ADR)-induced testicular toxicity, 50 male albino rats were classified into five groups of ten animals each as follows: placebo group; ADR group; ADR + rutin group; ADR + ozone group and ADR + rutin + ozone group. Sperm functions, testosterone (T), luteinising hormone (LH), follicle stimulating hormone (FSH), testicular enzymes, oxidant/antioxidant status, C-reactive protein, monocyte chemoattractant proteins-1 and leukotriene B4 were determined. After ADR injection, a decline in sperm functions was observed. FSH and LH levels were increased, T level and testicular enzymes were decreased, significant enhancement in oxidative stress with subsequent depletion in antioxidants was detected and inflammatory markers were significantly elevated. Treatment with rutin and/or ozone, however, improved the aforementioned parameters. Ozone therapy alone almost completely reversed the toxic effects of ADR and restored all parameters to normal levels. © 2016 Blackwell Verlag GmbH.

  4. Functionalized graphene oxide mediated adriamycin delivery and miR-21 gene silencing to overcome tumor multidrug resistance in vitro.

    Directory of Open Access Journals (Sweden)

    Feng Zhi

    Full Text Available Multidrug resistance (MDR is a major impediment to successful cancer chemotherapy. Co-delivery of novel MDR-reversing agents and anticancer drugs to cancer cells holds great promise for cancer treatment. MicroRNA-21 (miR-21 overexpression is associated with the development and progression of MDR in breast cancer, and it is emerging as a novel and promising MDR-reversing target. In this study, a multifunctional nanocomplex, composed of polyethylenimine (PEI/poly(sodium 4-styrenesulfonates (PSS/graphene oxide (GO and termed PPG, was prepared using the layer-by-layer assembly method to evaluate the reversal effects of PPG as a carrier for adriamycin (ADR along with miR-21 targeted siRNA (anti-miR-21 in cancer drug resistance. ADR was firstly loaded onto the PPG surface (PPGADR by physical mixing and anti-miR-21 was sequentially loaded onto PPGADR through electric absorption to form (anti-miR-21PPGADR. Cell experiments showed that PPG significantly enhanced the accumulation of ADR in MCF-7/ADR cells (an ADR resistant breast cancer cell line and exhibited much higher cytotoxicity than free ADR, suggesting that PPG could effectively reverse ADR resistance of MCF-7/ADR. Furthermore, the enhanced therapeutic efficacy of PPG could be correlated with effective silencing of miR-21 and with increased accumulation of ADR in drug-resistant tumor cells. The endocytosis study confirmed that PPG could effectively carry drug molecules into cells via the caveolae and clathrin-mediated endocytosis pathways. These results suggest that this PPG could be a potential and efficient non-viral vector for reversing MDR, and the strategy of combining anticancer drugs with miRNA therapy to overcome MDR could be an attractive approach in cancer treatment.

  5. Establishment of an adriamycin-resistant human bladder cancer cell line (T-24/ADM) and analysis of the mechanism of resistance

    OpenAIRE

    野比,直樹

    2001-01-01

    A human bladder cencer cell line resistant to adriamycin (ADM), T-24/ADM was establishied in vitro by exposing T-24 parent cells to a progressively higher concentration of the drug over an 18 month period. The T-24/ADM was 34.9 times more resistant to ADM than the T-24 parent. The T-24/ADM exhibited cross resistance to ADM derivatives, vinca alkaloid (vindesine, vincristine), etoposide and SN-38, but collateral sensitivity to methotrexate. The biological and biochemical characteristics of T-2...

  6. Effect of carvedilol on pulse pressure and left ventricular hypertrophy in spontaneously hypertensive rats with adriamycin nephropathy.

    Science.gov (United States)

    Jovanovic, Dijana; Jovovic, Djurdjica; Mihailovic-Stanojevic, Nevena; Miloradovic, Zoran; Naumovic, Radomir; Dimitrijevic, Jovan; Maksic, Nebojsa; Djukanovic, Ljubica

    2009-09-01

    Recent studies indicated pulse pressure as a risk factor for left ventricular hypertrophy, myocardial infarction, congestive heart failure and stroke as well as chronic renal failure progression. The present study examined the effects of carvedilol and its combination with captopril on blood pressure, left ventricular hypertrophy, kidney vascular changes and kidney function in spontaneously hypertensive rats with adriamycin nephropathy. Four groups of 20 SHR each were involved: (1) control group: SHR; (2) ADR group: SHR treated with ADR (2mg/kg i.v. twice in 20 days); (3) ADR-C group: SHR treated with ADR and carvedilol (30 mg/kg/day) and (4) ADR-CC group: SHR treated with ADR and carvedilol (30 mg/kg/day) and captopril (60 mg/kg/day). Systolic-, diastolic- and mean-pressures and pulse pressure were determined at weeks 6 and 12 after the second ADR injection; and body weight, creatinine clearance and proteinuria at weeks -3, 6 and 12. The rats were sacrificed at week 6 or 12, the weights of the left and right ventricles and kidneys measured and the kidney vascular index was calculated as described by Bader and Mayer. Both carvedilol alone and combined with captopril significantly reduced systemic blood pressure but the effect of the latter was more pronounced and registered from week 4 till the end of the study. Carvedilol and its combination with captopril significantly decreased SBP, DBP and MAP. They also decreased PP, prevented the development of LVH, and renal vascular changes and slowed the progression of chronic renal failure and these effects were stronger in the ADR-CC group than in the ADR-C group. The antihypertensive drugs failed to prevent proteinuria in ADR SHR. Significant positive correlations were found between PP (but not SBP, DBP and MAP) and both proteinuria and Ccr in all groups of rats. In conclusion, carvedilol alone, but more strongly in combination with captopril, significantly reduced blood pressure, PP, LVH, renal blood vessel changes and

  7. A retrospective study to compare the use of tacrolimus and cyclosporine in combination with adriamycin in post-transplant liver cancer patients.

    Science.gov (United States)

    Gu, Liangfeng; Jin, Wei; Kan, Liandi; Wang, Xia; Shan, Chunlei; Fan, Hui

    2015-03-01

    The aim of this study was to compare the clinical effect of tacrolimus (TAC) versus cyclosporine (CycA) in post-transplant hepatic cancer patients undergoing adriamycin hydrochloride (ADM) chemotherapy. Patients with advanced hepatic cancer who underwent liver transplant and subsequent therapy between March 2007 and March 2009 in our hospital were selected for this study. All of these patients were treated with chemotherapeutic agent adriamycin, with respect to immunosuppressant, whereas they received either TAC or CycA, and hence represented two groups, TAC and controls, respectively. The short- and long-term outcomes of two therapies, ADM + TAC and ADM + CsA, were compared. The TAC group patients showed improved remission compared to the control group (40 cases with 46.0 % versus 32 cases with 31.1 % remission, respectively). The 5-year survival in TAC group was significantly prolonged (20.7 %) compared to that of the controls (8.7 %). The short-term outcomes, such as serum levels of calcium, biomarkers of cardiac toxicity/functioning, and regulatory T lymphocytes counts (markers of immune functioning), were found to be significantly more auspicious with TAC treatment than with CycA. Our study showed that use of TAC plus ADM resulted in improved patient survival, tolerance of the graft, and remission compared to CycA combined with ADM. The serum levels of various markers in the short follow-up analysis indicated a better cardiac and immune functioning with TAC than with CycA treatment.

  8. Effect of beer consumption on levels of complex I and complex IV liver and heart mitochondrial enzymes and coenzymes Q9 and Q10 in adriamycin-treated rats.

    Science.gov (United States)

    Valls-Belles, Victoria; Torres, Carmen; Muñiz, Pilar; Codoñer-Franch, Pilar

    2010-04-01

    There is increasing evidence indicating that the dietary intake of food with high antioxidant capacity may protect mitochondria from damage and exert positive effects on different pathogenic processes. The present study was designed to evaluate the possible protective effect of alcohol-free beer intake on chain components dysfunction of liver and heart mitochondria, and to compare with the effect of alcohol beer intake. The study was carried out in rat heart and liver mitochondria by inducing with Adriamycin the dysfunction of the respiratory chain. Heart and liver mitochondria were isolated from rats and subjected to oxidative stress with two doses of Adriamycin (5 mg/Kg) 7 days from the beginning of consumption of both alcohol-free and alcohol beer during 31 days. Complexes I and IV and the levels of coenzymes Q(9) and Q(10) were evaluated and compared with a control group. Liver and heart mitochondria isolated from rats treated with Adryamicin showed a decrease in levels of complex I and complex IV enzymatic activity and in levels of coenzymes Q(9) and Q(10). Beer intake for itself does not affect any of the studied parameters. Therefore, the consumption of both alcohol and alcohol-free beer by rats treated with Adriamycin prevents the inhibition of enzymatic activities of complexes I and IV and the oxidation of coenzymes Q(9) and Q(10) in rat heart and liver mitochondria. These results indicate that alcohol-free beer prevents adriamycin-induced damage to mitochondrial chain components and, therefore, helps to prevent mitochondrial dysfunction.

  9. The enhanced anti-cancer effect of hexenyl ester of 5-aminolaevulinic acid photodynamic therapy in adriamycin-resistant compared to non-resistant breast cancer cells.

    Science.gov (United States)

    Yoon, Jung-Hoon; Yoon, Hyo-Eun; Kim, Ok; Kim, Sang Kyum; Ahn, Sang-Gun; Kang, Keon Wook

    2012-01-01

    5-Aminolaevulinic acid (ALA) and its derivatives act as precursors of the photosensitizer protoporphyrin IX (PpIX). In this study, we compared cytotoxic effects of photodynamic therapy (PDT) with the hexenyl ester of ALA (ALA-hx) between MCF-7 human breast cancer cells and adriamycin-resistant MCF-7 (MCF-7/ADR) cells. Cell viability and apoptosis were determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenylte-trazolium bromide (MTT), flow cytometry assays. Chick chorioallantoic membrane (CAM) assays were applied to assess in vivo effect of ALA-hx PDT. Molecular analyses using Western blots and minimal reporter constructs containing the antioxidant response element (ARE) region were performed to reveal mechanistic basis for the differential PDT sensitivity of MCF-7 and MCF-7/ADR cells. In MCF-7/ADR cells, PDT with ALA-hx more efficiently produced reactive oxygen species (ROS) and suppressed cell viability compared to MCF-7 cells. Cell death induced by ALA-hx PDT in MCF-7/ADR cells was mainly due to apoptosis. CAM assays confirmed that the apoptotic activity of PDT in MCF-7/ADR cells was significantly higher than that in control MCF-7 cells. We also found that MCF-7/ADR cells produced lower levels of glutathione (GSH), a major antioxidant, than control MCF-7 cells. Expression of Nrf2-dependent anti-oxidant genes including γ-glutamylcysteine ligase, heme oxygenase-1, and quinone oxidoreductase were down-regulated in MCF-7/ADR cells, and Nrf2 overexpression partially decreased the susceptibility of ALA-hx PDT in MCF-7/ADR cells. Moreover, PpIX synthesis and expression levels of protoporphyrinogen oxidase (PPO) and coproporphyrinogen oxidase (CPO) were much higher in MCF-7/ADR cells than MCF-7 cells. ALA-hx PDT more potently produced intracellular ROS in MCF-7/ADR cells, which might be due to down-regulation of Nrf2-mediated anti-oxidant gene transcription and up-regulation of PpIX synthesis via the induction of CPO and PPO. These findings suggest that ALA-hx PDT may be

  10. Pathologic Response Rates of Gemcitabine/Cisplatin versus Methotrexate/Vinblastine/Adriamycin/Cisplatin Neoadjuvant Chemotherapy for Muscle Invasive Urothelial Bladder Cancer

    Directory of Open Access Journals (Sweden)

    Franklin C. Lee

    2013-01-01

    Full Text Available Objectives. To compare pathologic outcomes after treatment with gemcitabine and cisplatin (GC versus methotrexate, vinblastine, adriamycin, and cisplatin (MVAC in the neoadjuvant setting. Methods. Data was retrospectively collected on 178 patients with T2-T4 bladder cancer who underwent radical cystectomy between 2003 and 2011. Outcomes of interest included those with complete response (pT0 and any response (≤pT1. Odds ratios were calculated using multivariate logistic regression. Results. Compared to those who did not receive neoadjuvant chemotherapy, there were more patients with complete response (28% versus 9%, OR 3.11 (95% CI: 1.45–6.64, P=0.03 and any response (52% versus 25%, OR 3.23 (95% CI: 1.21–8.64, P=0.01. Seventy-two patients received GC (n=41 or MVAC (n=31. CR was achieved in 29% and 22% of GC and MVAC patients, respectively (multivariate OR 0.39, 95% CI 0.10–1.58. Any response (≤pT1 was achieved in 56% of GC and 45% of MVAC patients (multivariate OR 0.45, 95% CI 0.12–1.71. Conclusions. We observed similar pathologic response rates for GC and MVAC neoadjuvant chemotherapy in this cohort of patients with muscle invasive urothelial cancer (MIBC. Our findings support the use of GC as an alternative regimen in the neoadjuvant setting.

  11. Tumor endothelial expression of P-glycoprotein upon microvesicular transfer of TrpC5 derived from adriamycin-resistant breast cancer cells

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    Dong, YePing; Pan, QiongXi; Jiang, Li; Chen, Zhen; Zhang, FangFang; Liu, YanJun; Xing, Hui; Shi, Mei; Li, Jiao; Li, XiYuan; Zhu, YaoDan; Chen, Yun; Bruce, Iain C.; Jin, Jian, E-mail: jinjian31@126.com; Ma, Xin, E-mail: maxin@jiangnan.edu.cn

    2014-03-28

    Highlights: • TrpC5 was mainly accumulated in microvesicles of drug-resistant MCF-7/ADM cells. • Microvesicles from MCF-7/ADM transferred TrpC5 to endothelial cells. • TrpC5 inhibition reduced P-glycoprotein accumulation on tumor blood vessels in vivo. - Abstract: Treatment of carcinoma commonly fails due to chemoresistance. Studies have shown that endothelial cells acquire resistance via the tumor microenvironment. Microvesicle (MV) shedding from the cell membrane to the microenvironment plays an important role in communication between cells. The aim of the present study was to determine whether MCF-7 adriamycin-resistant cells (MCF-7/ADM) shed MVs that alter the characteristics of human microvessel endothelial cells (HMECs). MVs from tumor cells transferred a Ca{sup 2+}-permeable channel TrpC5 to HMECs, inducing the expression of P-glycoprotein (P-gp) by activation of the transcription factor NFATc3 (nuclear factor of activated T cells isoform c3). Expression of the mdr1 gene was blocked by the TrpC5-blocking antibody T5E3, and the production of P-gp in HMECs was reduced by blockade of TrpC5. Thus, we postulate that endothelial cells acquire the resistant protein upon exposure to TrpC5-containg MVs in the microenvironment, and express P-gp in the TrpC5–NFATc3 signal pathway.

  12. Effects of Dietary Protein and Fat Contents on Renal Function and Inflammatory Cytokines in Rats with Adriamycin-Induced Nephrotic Syndrome

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    Su Yeon Kim

    2011-01-01

    Full Text Available The effects of dietary protein and fat on renal function-related blood and urine parameters, such as albumin, urinary protein,and inflammatory cytokines were investigated in adriamycin- (ADR induced nephrotic syndrome rats. ADR (2 mg/kg BW was injected i.p. weekly for six weeks to develop nephrotic syndrome; thereafter rats were fed low-protein/high-fat (LPHF or high-protein/low-fat (HPLF diets for five weeks. Renal function-related blood and urine parameters were measured before and after dietary intervention. Serum levels of albumin, TG, and creatinine were significantly higher in the LPHF group than in the HPLF group. Serum levels of albumin were low and urinary protein excretion protein was high in HPLF group. BUN and UUN levels were higher in the HPLF group than in the LPHF. Urinary excretion of creatinine was significantly higher in the HPLF group than in the LPHF group. Serum inflammatory cytokine levels did not differ between the two groups, however the levels of IL-6, TNF-α, and IL-13 in splenocyte supernatants were significantly higher in the LPHF group than in the HPLF group. We confirmed that protein and fat contents in diet affect renal function-related blood and urine parameters and splenocyte inflammatory cytokine levels in ADR-induced nephrotic syndrome rats.

  13. Induction therapy with vincristine, adriamycin, dexamethasone (VAD) and intermediate-dose melphalan (IDM) followed by autologous or allogeneic stem cell transplantation in newly diagnosed multiple myeloma.

    Science.gov (United States)

    Lokhorst, H M; Sonneveld, P; Cornelissen, J J; Joosten, P; van Marwijk Kooy, M; Meinema, J; Nieuwenhuis, H K; van Oers, M H; Richel, D J; Segeren, C N; Veth, G; Verdonck, L F; Wijermans, P W

    1999-02-01

    We performed a phase II study to test the efficacy and feasibility of induction therapy with vincristine, adriamycin and dexamethasone (VAD) and intermediate-dose melphalan, 70 mg/m2 (IDM), to autologous or allogeneic stem cell transplantation in newly diagnosed multiple myeloma (MM). A total of 77 patients received two cycles of VAD (n = 62) and/or two cycles of i.v. IDM 70 mg/m2 (n = 15) combined with G-CSF. PBSC were harvested after the first IDM, successfully in 87% of patients. Patients with a response to induction received myeloablative therapy with PBSCT (n = 50) followed by IFN maintenance or allo-BMT (n = 11). Seventy-two per cent of patients achieved a response after VAD which increased to 85% after IDM. Of patients who received PBSCT and allo-BMT, 24% and 45% achieved CR, respectively. Toxicity of induction consisted mainly of bone marrow suppression after IDM (median 8 days) with prolonged aplasia in 11% of patients after the second IDM. Only six infections WHO grade 3 occurred during induction. Treatment-related mortality of PBSCT and allo-BMT was 6% and 18%, respectively. Median time of follow-up is 44 months, and 50% of patients after PBSCT and 60% of patients after allo-BMT are still in remission. Survival rates of all patients were 82%, 75% and 63%, and for transplanted patients 86%, 79% and 68% after 12, 24 and 36 months. Well known prognostic factors, including alpha-IFN maintenance after PBSCT, were not significant for response or survival although patients in CR after allo-BMT had a strong tendency for better outcome. VAD/IDM is an effective and safe induction therapy for autologous and allogeneic stem cell transplantation. Based on these observations a phase III trial was started in October 1995 comparing IFN maintenance with PBSCT and allo-BMT after response to induction with VAD and IDM.

  14. Beneficial Effects of the Activation of the Angiotensin-(1–7) Mas Receptor in a Murine Model of Adriamycin-Induced Nephropathy

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    Silveira, Kátia Daniela; Barroso, Lívia Corrêa; Vieira, Angélica Thomáz; Cisalpino, Daniel; Lima, Cristiano Xavier; Bader, Michael; Arantes, Rosa Maria Esteves; dos Santos, Robson Augusto Souza

    2013-01-01

    Angiotensin-(1–7) [Ang-(1–7)] is a biologically active heptapeptide that may counterbalance the physiological actions of angiotensin II (Ang II) within the renin-angiotensin system (RAS). Here, we evaluated whether activation of the Mas receptor with the oral agonist, AVE 0991, would have renoprotective effects in a model of adriamycin (ADR)-induced nephropathy. We also evaluated whether the Mas receptor contributed for the protective effects of treatment with AT1 receptor blockers. ADR (10 mg/kg) induced significant renal injury and dysfunction that was maximal at day 14 after injection. Treatment with the Mas receptor agonist AVE 0991 improved renal function parameters, reduced urinary protein loss and attenuated histological changes. Renoprotection was associated with reduction in urinary levels of TGF-β. Similar renoprotection was observed after treatment with the AT1 receptor antagonist, Losartan. AT1 and Mas receptor mRNA levels dropped after ADR administration and treatment with losartan reestablished the expression of Mas receptor and increased the expression of ACE2. ADR-induced nephropathy was similar in wild type (Mas+/+) and Mas knockout (Mas−/−) mice, suggesting there was no endogenous role for Mas receptor activation. However, treatment with Losartan was able to reduce renal injury only in Mas+/+, but not in Mas−/− mice. Therefore, these findings suggest that exogenous activation of the Mas receptor protects from ADR-induced nephropathy and contributes to the beneficial effects of AT1 receptor blockade. Medications which target specifically the ACE2/Ang-(1–7)/Mas axis may offer new therapeutic opportunities to treat human nephropathies. PMID:23762470

  15. Beneficial effects of the activation of the angiotensin-(1-7) MAS receptor in a murine model of adriamycin-induced nephropathy.

    Science.gov (United States)

    Silveira, Kátia Daniela; Barroso, Lívia Corrêa; Vieira, Angélica Thomáz; Cisalpino, Daniel; Lima, Cristiano Xavier; Bader, Michael; Arantes, Rosa Maria Esteves; Dos Santos, Robson Augusto Souza; Simões-E-Silva, Ana Cristina; Teixeira, Mauro Martins

    2013-01-01

    Angiotensin-(1-7) [Ang-(1-7)] is a biologically active heptapeptide that may counterbalance the physiological actions of angiotensin II (Ang II) within the renin-angiotensin system (RAS). Here, we evaluated whether activation of the Mas receptor with the oral agonist, AVE 0991, would have renoprotective effects in a model of adriamycin (ADR)-induced nephropathy. We also evaluated whether the Mas receptor contributed for the protective effects of treatment with AT1 receptor blockers. ADR (10 mg/kg) induced significant renal injury and dysfunction that was maximal at day 14 after injection. Treatment with the Mas receptor agonist AVE 0991 improved renal function parameters, reduced urinary protein loss and attenuated histological changes. Renoprotection was associated with reduction in urinary levels of TGF-β. Similar renoprotection was observed after treatment with the AT1 receptor antagonist, Losartan. AT1 and Mas receptor mRNA levels dropped after ADR administration and treatment with losartan reestablished the expression of Mas receptor and increased the expression of ACE2. ADR-induced nephropathy was similar in wild type (Mas(+/+) ) and Mas knockout (Mas (-/-)) mice, suggesting there was no endogenous role for Mas receptor activation. However, treatment with Losartan was able to reduce renal injury only in Mas(+/+) , but not in Mas (-/-) mice. Therefore, these findings suggest that exogenous activation of the Mas receptor protects from ADR-induced nephropathy and contributes to the beneficial effects of AT1 receptor blockade. Medications which target specifically the ACE2/Ang-(1-7)/Mas axis may offer new therapeutic opportunities to treat human nephropathies.

  16. A comparison of the long-term effects of lanthanum carbonate and calcium carbonate on the course of chronic renal failure in rats with adriamycin-induced nephropathy.

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    Tsuyoshi Takashima

    Full Text Available Lanthanum carbonate (LA is an effective phosphate binder. Previous study showed the phosphate-binding potency of LA was twice that of calcium carbonate (CA. No study in which LA and CA were given at an equivalent phosphate-binding potency to rats or humans with chronic renal failure for a long period has been reported to date. The objective of this study was to compare the phosphate level in serum and urine and suppression of renal deterioration during long-term LA and CA treatment when they were given at an equivalent phosphate-binding potency in rats with adriamycin (ADR-induced nephropathy. Rats were divided into three groups: an untreated group (ADR group, a CA-treated (ADR-CA group and a LA-treated (ADR-LA group. The daily oral dose of LA was 1.0 g/kg/day and CA was 2.0 g/kg/day for 24 weeks. The serum phosphate was lower in the ADR-CA or ADR-LA group than in the ADR group and significantly lower in the ADR-CA group than in the ADR group at each point, but there were no significant differences between the ADR and ADR-LA groups. The serum phosphate was also lower in the ADR-CA group than in the ADR-LA group, and there was significant difference at week 8. The urinary phosphate was significantly lower in the ADR-CA group than in the ADR or ADR-LA group at each point. The urinary phosphate was also lower in the ADR-LA group than in the ADR group at each point, and significant difference at week 8. There were no significant differences in the serum creatinine or blood urea nitrogen among the three groups. In conclusion, this study indicated the phosphate-binding potency of LA isn't twice as strong as CA, and neither LA nor CA suppressed the progression of chronic renal failure in the serum creatinine and blood urea nitrogen, compared to the untreated group.

  17. Systematic expression analysis of genes related to multidrug-resistance in isogenic docetaxel- and adriamycin-resistant breast cancer cell lines.

    Science.gov (United States)

    Li, Wen-Jing; Zhong, Shan-Liang; Wu, Yuan-Jian; Xu, Wei-Dong; Xu, Jin-Jin; Tang, Jin-Hai; Zhao, Jian-Hua

    2013-11-01

    Docetaxel (Doc) and adriamycin (Adr) are two of the most effective chemotherapeutic agents in the treatment of breast cancer. However, their efficacy is often limited by the emergence of multidrug resistance (MDR). The purpose of this study was to investigate MDR mechanisms through analyzing systematically the expression changes of genes related to MDR in the induction process of isogenic drug resistant MCF-7 cell lines. Isogenic resistant sublines selected at 100 and 200 nM Doc (MCF-7/100 nM Doc and MCF-7/200 nM Doc) or at 500 and 1,500 nM Adr (MCF-7/500 nM Adr and MCF-7/1,500 nM) were developed from human breast cancer parental cell line MCF-7, by exposing MCF-7 to gradually increasing concentrations of Doc or Adr in vitro. Cell growth curve, flow cytometry and MTT cytotoxicity assay were preformed to evaluate the MDR characteristics developed in the sublines. Some key genes on the pathways related to drug resistance (including drug-transporters: MDR1, MRP1 and BCRP; drug metabolizing-enzymes: CYP3A4 and glutathione S-transferases (GST) pi; target genes: topoisomerase II (TopoIIα) and Tubb3; apoptosis genes: Bcl-2 and Bax) were analyzed at RNA and protein expression levels by real time RT-qPCR and western blot, respectively. Compared to MCF-7/S (30.6 h), cell doubling time of MCF-7/Doc (41.6 h) and MCF-7/Adr (33.8 h) were both prolonged, and the cell proportion of resistant sublines in G1/G2 phase increased while that in S-phase decreased. MCF-7/100 nM Doc and MCF-7/200 nM Doc was 22- and 37-fold resistant to Doc, 18- and 32-fold to Adr, respectively. MCF-7/500 nM Adr and MCF-7/1,500 nM Adr was 61- and 274-fold resistant to Adr, three and 12-fold to Doc, respectively. Meantime, they also showed cross-resistance to the other anticancer drugs in different degrees. Compared to MCF-7/S, RT-qPCR and Western blot results revealed that the expression of MDR1, MRP1, BCRP, Tubb3 and Bcl-2 were elevated in both MCF-7/Doc and MCF-7/Adr, and TopoIIα, Bax were down

  18. A phase II study of 5-fluorouracil, leucovorin, adriamycin, and cisplatin (FLAP) for metastatic gastric and gastroesophageal junction adenocarcinoma. A Penn Cancer Clinical Trial Group and Roswell Park Cancer Institute Community Oncology Research Program Trial.

    Science.gov (United States)

    Vaughn, D J; Meropol, N J; Holroyde, C; Mintzer, D; Nuamah, I; Armstead, B; Douglass, H O; Haller, D G

    1997-06-01

    A Phase II study was performed to evaluate the activity and toxicity of 5-fluorouracil, leucovorin, Adriamycin, and cisplatin combination chemotherapy (FLAP) in patients with previously untreated advanced gastric and gastroesophageal (GE) junction adenocarcinoma. Forty-two consecutive patients were enrolled to received FLAP in this multi-institutional trial. Response, toxicity, and survival data were noted. Fifteen of 42 (36%) patients demonstrated objective responses, with two complete responses (5%) and 13 partial responses (31%). The median time to disease progression was 17 weeks, and the overall survival duration was 30 weeks. Myelosuppression was significant, requiring dose modifications, but there were no treatment-related deaths. FLAP is an active regimen in the treatment of advanced gastric and GE junction adenocarcinoma. We are presently using this regimen in the neoadjuvant setting in patients with gastric and GE junction cancers.

  19. Low-dose of multi-glycoside of Tripterygium wilfordii Hook. f., a natural regulator of TGF-β1/Smad signaling activity improves adriamycin-induced glomerulosclerosis in vivo.

    Science.gov (United States)

    Wan, Yi-Gang; Che, Xiao-Yan; Sun, Wei; Huang, Yan-Ru; Meng, Xian-Jie; Chen, Hao-Li; Shi, Xi-Miao; Tu, Yue; Wu, Wei; Liu, Ying-Lu

    2014-02-12

    Transforming growth factor (TGF)-β1/Smad signaling pathway plays a critical role in the prolonged glomerulosclerosis (GS), which is an important determinant during the progression in chronic kidney disease (CKD). For recent 30 years, multi-glycoside of Tripterygium wilfordii Hook. f. (GTW), an extract from Chinese herbal medicine has been proved clinically effective in improving GS in CKD in China. However, therapeutic mechanisms involved in vivo are still unclear. In this study, we aimed to explain the dose-effects and molecular mechanisms of GTW on GS by regulating TGF-β1/Smad signaling activity in adriamycin (ADR)-induced nephropathy (ADRN). Rats with ADRN, created by unilateral nephrectomy and twice adriamycin injections (ADR, 4 mg/kg and 2 mg/kg) within 4 weeks, were divided into four groups, the Sham group, the Vehicle group, the low-dose GTW-treated group, and the high-dose GTW-treated group, and that, sacrificed at the end of the 6th week after administration. Proteinuria, blood biochemical parameters, glomerulosclerotic morphological makers, podocyte shape, and nephrin expression were examined, respectively. Protein expressions of key signaling molecules in TGF-β1/Smad pathway, such as TGF-β1, Smad3, phosphorylated-Smad2/3 (p-Smad2/3), and Smad7, were also evaluated individually. The results indicated that the characterizations of ADRN involved the typical prolonged GS, a small amount of abnormal proteinuria, and the failing renal function; TGF-β1/Smad signaling molecules, especially Smad3, p-Smad2/3, and Smad7 were activated in vivo, accompanied by the exasperation of glomerulosclerotic lesion; GTW at high-dose (100 mg/kg) and low-dose (50 mg/kg) could slightly ameliorate the prolonged GS and nephrin expression, furthermore, the anti-proliferative action of GTW at high-dose was superior to that at low-dose, but caused the significant liver injury; in ADRN model rats, protein expressions of TGF-β1, p-Smad2/3, and Smad7 in the kidneys could be

  20. Long-term results of a randomized trial comparing cisplatin with cisplatin and cyclophosphamide with cisplatin, cyclophosphamide, and adriamycin in advanced ovarian cancer. GICOG (Gruppo Interregionale Cooperativo Oncologico Ginecologia), Italy.

    Science.gov (United States)

    1992-05-01

    We report the long-term results of a randomized trial comparing cisplatin (P) with cisplatin and cyclophosphamide (CP) with cisplatin, cyclophosphamide, and adriamycin (CAP) in advanced ovarian cancer. Overall, this update confirms previously published data on 529 cases. Median survival times for the three treatments--CAP, CP, and P--are, respectively, 23, 20, and 19 months. The differences among the three arms are still nonsignificant and the estimated percentage survival at 7 years and confidence limits are, respectively, 21.7 (14.9-28.4), 17.0 (11.0-22.9), and 12.2 (6.9-17.4). According to the results of the Cox regression model on prognostic factors, higher grading, a larger residual tumor size, and performance status less than 80 (Karnovsky) all were independently associated with a poorer outcome, while a serous histotype was related to a better prognosis. The other variables (age, stage, center, type of surgery) initially included in the model did not appear to be significantly related to prognosis. The implications of these long-terms results relative to the application of combination chemotherapy with CAP or CP are discussed.

  1. Efficacy of ginger for prophylaxis of chemotherapy-induced nausea and vomiting in breast cancer patients receiving adriamycin-cyclophosphamide regimen: a randomized, double-blind, placebo-controlled, crossover study.

    Science.gov (United States)

    Thamlikitkul, Lucksamon; Srimuninnimit, Vichien; Akewanlop, Charuwan; Ithimakin, Suthinee; Techawathanawanna, Sirisopa; Korphaisarn, Krittiya; Chantharasamee, Jomjit; Danchaivijitr, Pongwut; Soparattanapaisarn, Nopadol

    2017-02-01

    The purpose of this study is to determine the efficacy of ginger for reducing chemotherapy-induced nausea and vomiting (CINV) in breast cancer patients receiving adriamycin and cyclophosphamide (AC) regimens. We enrolled breast cancer patients receiving AC who experienced moderate to severe nausea or vomiting during the first chemotherapy cycle. Subjects were randomized to receive a 500-mg ginger capsule or placebo twice a day for 5 days starting on the first day of the second AC cycle and were switched to the other treatment in the third cycle. All participants also received ondansetron and dexamethasone for CINV prophylaxis. Nausea severity was recorded once a day during the first 5 days of each cycle. The primary outcome was reduction in nausea score. Thirty-four subjects (68 cycles of AC) were enrolled. Mean (range) maximum nausea score in the first AC cycle was 58 (40-90). Thirty-three subjects (97 %) received the same AC doses in the second as in the third cycle. Mean (±standard error) maximum nausea scores in patients receiving ginger and placebo were 35.36 (±4.43) and 32.17 (±3.71), respectively. The difference in mean maximum nausea scores was 3 (95 % confidence interval, -3 to 9; P = 0.3). There were no significant differences between ginger and placebo in terms of vomiting incidence and severity, rescue medication use, chemotherapy compliance, and adverse events. Ginger (500 mg) twice daily was safe, but conferred no additional benefit in terms of reducing nausea severity in breast cancer patients receiving AC and ondansetron and dexamethasone for CINV prophylaxis.

  2. Use of laser photomodulation in the evolution of oral mucositis associated to cyclophosphamide, methotrexate, 5-fluouracil - CMF in 5 fluouracil + adriamycin + cyclophosphamide - FAC chemotherapy protocols in patients with breast cancer

    Science.gov (United States)

    de Fátima Lima Ferreira, Maria; de Carvalho, Fabiola Bastos; de Oliveira, Susana C. P. S.; Monteiro, Juliana S. C.; Santos, Gustavo M. P.; Gesteira, Maria F. M.; Maia, Tereza Cristina Teixeira; Pinheiro, Antônio L. B.

    2013-03-01

    The aim of this study was to evaluate the efficacy of the laser photobiomodulation (FBML) in prevention and treatment of oral mucositis induced by chemotherapy protocols CMF (cyclophosphamide, methotrexate, 5-Fluouracil) and FAC (5 Fluouracil + Adriamycin + Cyclophosphamide) in cancer patients breast. We selected 28 patients treated at the Center for High Complexity (CACON), who underwent 6 cycles of 21 days of treatment, with diagnosis of infiltrating ductal carcinoma (ICD C50.9). Were randomly divided into three groups: Group A - eight patients (Protocol FAC + Dental protocol of CACON + Laser), Group B - 6 patients (Protocol CMF + Dental protocol of CACON + Laser), Group C - was divided into two sub-groups: Group C1 with 8 patients (Control Group 1: FAC + Dental protocol o CACON) and group C2 with 6 patients (control group 2: Protocol CMF + Dental protocol of CACON). Patients in Group A and B were use of preventive FBML 24 hours before the start of chemotherapy cycle, then every 48 hours and was extended up to one week following completion of chemotherapy. The groups A and B, presented oral mucositis grade 0 (64.29%) p = 0.07, grade I (7.14%), grade II (14.29%), grade III (7.14 %), grade IV (7.14%) compared to group C, who presented mucositis grade 0 (35.71%) in the initial evaluation with p = 0.10, grade I (21.43%), grade II (28.57%), grade III (14.29%), grade IV (0.00%), patients who used the FBML as a preventive and therapeutic showed a reduction and pain relief in 42.86%. It is concluded that the low power laser when used preventively or as therapy and showed immediate relief of pain and accelerate tissue repair.

  3. Molecular analysis of Bcl-2 and cyclin D1 expression in differentially expressing estrogen receptor breast cancer MCF7, T47D and MDA-MB-468 cell lines treated with adriamycin

    Directory of Open Access Journals (Sweden)

    2008-08-01

    Full Text Available Background and purpose of the study: Bcl-2 and Cyclin D1 (CCND1 are key elements in cancer development and progression. Bcl-2 acts as a cell death suppressor and is involved in apoptosis regulation. Cyclin D1 is an important regulator of G1/S phase of the cell cycle progression. In addition, estrogen receptor (ER is an important prognostic factor in breast cancer cells. Therefore it is important to determine the Bcl-2 and CCND1 expression in MCF7, T47D and MDA-MB-468 breast cancer cell lines with different ER status following Adriamycin (ADR treatment. Methods: Cytotoxicity of ADR (250 and 500nM after 1-5 days exposure of the cell lines was evaluated by MTT assay. The mRNA and protein levels of Bcl-2 and cyclin D1 in tested cell lines were also analyzed by RT-PCR and immunocytochemistry (ICC methods. Results: ADR cytotoxicity was highest in MDA-MB-468 and lowest in MCF7 cells in a time-dependent manner. Bcl-2 mRNA increased in MCF7 and decreased in MDA-MB-468 after exposure to ADR but it was less detectable in T47D cells. The expression of CCND1 in MCF7 with high level of ER expression was higher than the other two cell lines in untreated conditions. However, CCND1 mRNA did not show significant changes after ADR treatment. Immunocytochemical analysis did not show significant differences between Bcl-2 protein expression in the presence or absence of ADR in MDA-MB-468 cell line while in T47D and MCF7 cells its expression decreased after exposure to ADR. In addition to nuclear expression of cyclin D1 in all cell lines, strong cytoplasmic expression of cyclin D1 protein was observed only in MCF7 and T47D cells. Conclusion: The tested cell lines with different levels of ER expression showed differential molecular responses to ADR that is important in tumor-targeted cancer therapy.

  4. Evaluation of the secondary cardiotoxicity to use adriamycin in patients with breast cancer with nuclear medicine studies; Evaluacion de la cardiotoxicidad secundaria al empleo de adriamicina en pacientes con cancer de mama con estudios de medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Garcia P, S

    2003-07-01

    The number of surviving of cancer is increased highly with the current regimes of chemotherapy. For the year 2010 in U.S. it is considered that one of each 250 adults can be a survivor of wicked illness and many of these survivors will have been exposed to regimes with anthracycline. The anthracyclines concern to the group of antibiotics and they are effective point for hematological neoplasms as solid tumors. Although the relationship dose answer, among the regimes with anthracycline as well as the remission and the period free of illness is very established one, the latent risk of cardiotoxicity limits the use of these agents. Results: 30 patients were recruited with diagnostic of invader breast cancer tried with chemotherapy to base anthracycline in the understood period of may to december of the 2000. The medium of age it was of 48 years with a range of 27-80 years. The clinical stage that prevailed it was the EC IIB that represents a 36% in second place the EC IIIA with a 20%, EC IIA with 16% the EC IIIB and the unclassifiable ones represented 10% with 3 patients and finally the clinical stage IV with 8%, the most frequent localization was the left side.The received chemotherapy outline it was with the base of doxorubicin in its modality neo or patient adjutant, 5 patients also received taxanes like treatment adjutant. Prevailed the continuous infusion in 24 hours in 50%. The medium of accumulated dose of adriamycin was 274 mg/m{sup 2}. With a left ventricular ejection fraction LVEF pretreatment of 62% (medium) determined by VRI and a medium of 69% by SPECT. The LVEF pos treatment had one medium of 57% for VRI and by SPECT a medium of 60%. They received concomitant radiotherapy with chemotherapy in modality pre operation 53.3% (16 patients), and 40% radiotherapy post operation, 2 patients didn't receive radiotherapy. In relation to the heart toxicity any patient present electrocardiographic alterations, neither arrhythmias neither clinical data of heart

  5. Effects of dorsal root ganglion destruction by adriamycin in patients with postherpetic neuralgia Efeitos da destruição da raiz dorsal ganglionar pela adriamicina em pacientes com neuralgia pós-herpética

    Directory of Open Access Journals (Sweden)

    He Chun-jing

    2012-06-01

    Full Text Available PURPOSE: To investigate the effects of dorsal root ganglion destruction in patients with postherpetic neuralgia (PHN. METHODS: Seventy-two patients with PHN selected were randomly divided into two groups (n=36. Group A was the control group (treated by injection and group B was the group of dorsal root ganglion destruction by adriamycin. Visual analog scale scores (VAS, SAS, SF-MPQ scores. Clinical effects and therapy safety were evaluated before therapy, one week, three and six months after therapy. Forty-four patients were available for intention-to-treat analysis. RESULTS: The average pain scores on the Likert scale were significantly reduced at each point in group B. Patients in group B reported clinical effectiveness at six months as excellent response, good response, improved but unsatisfactory or unchanged 16, 12 and 8.VAS scores at each time point after the operation were lower than that before operation and in group A, there was significant difference. Patients showed significant improvement in sleep scores in group B. There was significant difference at T2 in group A than T1. There was no significant difference in group A at T3, T4 after the operation than that before operation. Between group comparison: there was significant difference between group A and group B at each time point after the operation. CONCLUSIONS: Dorsal root ganglion destruction by adriamycin under guidance of C-arm perspective, the puncture operation was accurate without any adverse reaction or serious complications, which could effectively relieve pain of patients with postherpetic neuralgia, but the long-term effects needed further study.OBJETIVO: Investigar os efeitos da destruição da raiz dorsal ganglionar em pacientes com neuralgia pós-herpética. MÉTODOS: Setenta e dois pacientes selecionados com neuralgia pós-herpética foram randomicamente distribuídos em dois grupos (n=36. Grupo A foi o grupo controle (tratado por injeção e o grupo B foi o grupo

  6. Sarkosyl-Induced Helical Structure of an Antimicrobial Peptide GW-Q6 Plays an Essential Role in the Binding of Surface Receptor OprI in Pseudomonas aeruginosa

    OpenAIRE

    Tseng, Tien-Sheng; Wang, Shih-Han; Chang, Ting-Wei; Wei, Hung-Mu; Wang, Yu-June; Tsai, Keng-Chang; Liao, You-Di; Chen, Chinpan

    2016-01-01

    The emergence of antibiotic-resistant microbial strains has become a public health issue and there is an urgent need to develop new anti-infective molecules. Although natural antimicrobial peptides (AMPs) can exert bactericidal activities, they have not shown clinical efficacy. The limitations of native peptides may be overcome with rational design and synthesis. Here, we provide evidence that the bactericidal activity of a synthetic peptide, GW-Q6, against Pseudomonas aeruginosa is mediated ...

  7. Addition of AT(1) blocker fails to overcome resistance to ACE inhibition in adriamycin nephrosis

    NARCIS (Netherlands)

    Bos, H; Henning, RH; Tiebosch, ATMG; de Jong, PE; de Zeeuw, D; Navis, G

    Background. Angiotensin-converting enzyme (ACE) inhibitors provide renoprotection, but there is considerable interindividual variability in therapeutic efficacy, with residual proteinuria and progressive renal function loss in many individuals. This requires additional strategies to optimize therapy

  8. Clinical study on the adriamycin induced cardiomyopathy using the cardiac magnetic resonance imaging. Total dose and cardiac dysfunction

    Energy Technology Data Exchange (ETDEWEB)

    Yamaguchi, Kyoko; Teraoka, Kunihiko; Hirano, Masaharu [Tokyo Medical Coll. (Japan)

    2001-05-01

    We studied cardiac functional disorders caused by Adoriamycin using gadolinium (Gd) contrast cine MRI. Forty-eight patients were given ACT (31 men and 17 women; mean age, 52{+-}15 years). First, the relationship between dose and the left ventricular volume, cardiac function, left ventricular cardiac mass and localized wall motion were examined in all patients. Patients given a total dose of 300 mg/m{sup 2} or higher were assigned to the high dose group and those given doses under 300 mg/m{sup 2} to the low dose group. The same parameters were studied in both groups and compared. A 1.5-Tesla superconductive MRI was used for all studies. Cine images of the long and short axes at the papillary muscle level were obtained by ECG R-wave synchronized Gd contrast cine MRI. Left ventricular volume and cardiac function were analyzed using the long-axis cine images and the wall thickness in diastole and systole was measured at each site using the short-axis cine images. The percentage of wall thickness was calculated at each site. The mean ACT dose was 273.3{+-}218.2 mg/m{sup 2}. In all patients the total dose directly correlated with ESVI and inversely correlated with the ejection fraction (EF). In the high dose group, the total dose and EF were inversely correlated, but no significant differences were observed in the low dose group. In the high dose group, the ESVI was significantly greater and the SVI and EF were more significantly reduced than in the low dose group. In the high dose group, the thickness of the anterior, lateral and posterior walls, excluding the septum, was significantly lower than in the low dose group. However, changes in wall thickness were not significantly different between the groups. Gd contrast cine MRI was useful in examining cardiac functional disorders caused by anthracyclines. The total dose of anthracycline correlated directly with the ESVI, and inversely with the EF. A total dose of 300 mg/m{sup 2} appeared to be the borderline dose beyond which there were significant cardiac functional disorders. (author)

  9. Involvement of renal ACE activity in proteinuria-associated renal damage in untreated and treated adriamycin nephrotic rats

    NARCIS (Netherlands)

    Bos, H; Laverman, GD; Henning, RH; Tiebosch, AT; de Jong, PE; de Zeeuw, D; Navis, G

    Proteinuria is assumed to play a pathogenetic role in progressive renal damage. Angiotensin-converting enzyme (ACE) inhibition reduces proteinuria and provides renoprotection. This suggests that ACE activity might play a pathogenetic role in the development of proteinuria-induced renal structural

  10. Individual differences in renal ACE activity in healthy rats predict susceptibility to adriamycin-induced renal damage

    NARCIS (Netherlands)

    Rook, M; Lely, AT; Kramer, AB; van Goor, H; Navis, G

    Background. In man, differences in angiotensin converting enzyme (ACE) levels, related to ACE (I/D) genotype, are associated with renal prognosis. This raises the hypothesis that individual differences in renal ACE activity are involved in renal susceptibility to inflicted damage. Therefore, we

  11. Induction of C-Mip by IL-17 Plays an Important Role in Adriamycin-Induced Podocyte Damage

    Directory of Open Access Journals (Sweden)

    Yanbo Liu

    2015-07-01

    Full Text Available Background/Aims: Although the disturbance of T lymphocyte and glomerular podocyte exerts a crucial function in the pathogenesis of proteinuria, the potential link is still unclear. Methods: The balance of Treg and Th17 cells, and the expression of IL-17/IL-17R and c-mip were investigated in adrimycin-induced nephropathy (AN mice. The effect and mechanism of IL-17 on podocyte were explored in cultured podocytes. Results: The proportion of Th17 cells in peripheral blood mononuclear cells, the amount of IL-17 in serum and kidney cortical homogenates, and the expression of IL-17R and c-mip in glomerular podocyte were increased obviously in AN mice. In cultured podocytes, recombinant IL-17 led to an induction of apoptosis and cytoskeletal disorganization, an overproduction of c-mip while down-regulation of phosphor-nephrin, and an increased binding of c-mip to NF-κB/RelA. Silence of c-mip prevented podocyte apoptosis and reduction of phosphor-nephrin by prompting nuclear translocation of NF-κB/RelA in IL-17 treated cells. Persistent activation of NF-κB up-regulated pro-survival protein Bcl-2 and decreased podocyte apoptosis, but had no effect on phosphor-nephrin level. Conclusion: These findings demonstrated that induction of IL-17 released by Th17 cells plays a key role in podocytopathy most likely through down-regulation of phosphor-nephrin and Bcl-2 level via overproduction of c-mip.

  12. Prevention of Adriamycin induced cardiotoxicity in rats — A comparative study with subacute angiotensin-converting enzyme inhibitor and nonselective beta blocker therapy

    Directory of Open Access Journals (Sweden)

    Ajay Godwin Potnuri

    2017-03-01

    Conclusion: The present study found an identical therapeutic outcome from ACE inhibition and β blockade with a better attenuation of inflammation and structural preservation with ACE inhibition and superior antioxidant and antiapoptotic effect with βB treatment.

  13. Enhanced antitumor efficacy and counterfeited cardiotoxicity of combinatorial oral therapy using Doxorubicin- and Coenzyme Q10-liquid crystalline nanoparticles in comparison with intravenous Adriamycin

    DEFF Research Database (Denmark)

    Swarnakar, Nitin K; Thanki, Kaushik; Jain, Sanyog

    2014-01-01

    and strong synergism for combination at 1:10 dose ratio owing to higher cellular uptake, nuclear colocalization, higher apoptotic index and 8-OHdG levels. The prophylactic antitumor efficacy of the CoQ10-LCNPs was also established using tumor induction and progression studies. Finally, therapeutic antitumor......, with Dox-induced-cardiotoxicity was completely counterfeited in combination. In nutshell, LCNPs pose great potential in improving the therapeutic efficacy of drugs by oral route of administration. FROM THE CLINICAL EDITOR: This study describes the use of liquid crystalline nanoparticles containing coenzyme...

  14. Poly(ADP-ribose polymerase (PARP-1 is not involved in DNA double-strand break recovery

    Directory of Open Access Journals (Sweden)

    Fernet Marie

    2003-07-01

    Full Text Available Abstract Background The cytotoxicity and the rejoining of DNA double-strand breaks induced by γ-rays, H2O2 and neocarzinostatin, were investigated in normal and PARP-1 knockout mouse 3T3 fibroblasts to determine the role of poly(ADP-ribose polymerase (PARP-1 in DNA double-strand break repair. Results PARP-1-/- were considerably more sensitive than PARP-1+/+ 3T3s to induced cell kill by γ-rays and H2O2. However, the two cell lines did not show any significant difference in the susceptibility to neocarzinostatin below 1.5 nM drug. Restoration of PARP-1 expression in PARP-1-/- 3T3s by retroviral transfection of the full PARP-1 cDNA did not induce any change in neocarzinostatin response. Moreover the incidence and the rejoining kinetics of neocarzinostatin-induced DNA double-strand breaks were identical in PARP-1+/+ and PARP-1-/- 3T3s. Poly(ADP-ribose synthesis following γ-rays and H2O2 was observed in PARP-1-proficient cells only. In contrast neocarzinostatin, even at supra-lethal concentration, was unable to initiate PARP-1 activation yet it induced H2AX histone phosphorylation in both PARP1+/+ and PARP-1-/- 3T3s as efficiently as γ-rays and H2O2. Conclusions The results show that PARP-1 is not a major determinant of DNA double-strand break recovery with either strand break rejoining or cell survival as an endpoint. Even though both PARP-1 and ATM activation are major determinants of the cell response to γ-rays and H2O2, data suggest that PARP-1-dependent poly(ADP-ribose synthesis and ATM-dependent H2AX phosphorylation, are not inter-related in the repair pathway of neocarzinostatin-induced DNA double-strand breaks.

  15. Modified CTAB and TRIzol protocols improve RNA extraction from chemically complex Embryophyta.

    Science.gov (United States)

    Jordon-Thaden, Ingrid E; Chanderbali, Andre S; Gitzendanner, Matthew A; Soltis, Douglas E

    2015-05-01

    Here we present a series of protocols for RNA extraction across a diverse array of plants; we focus on woody, aromatic, aquatic, and other chemically complex taxa. Ninety-one taxa were subjected to RNA extraction with three methods presented here: (1) TRIzol/TURBO DNA-free kits using the manufacturer's protocol with the addition of sarkosyl; (2) a combination method using cetyltrimethylammonium bromide (CTAB) and TRIzol/sarkosyl/TURBO DNA-free; and (3) a combination of CTAB and QIAGEN RNeasy Plant Mini Kit. Bench-ready protocols are given. After an iterative process of working with chemically complex taxa, we conclude that the use of TRIzol supplemented with sarkosyl and the TURBO DNA-free kit is an effective, efficient, and robust method for obtaining RNA from 100 mg of leaf tissue of land plant species (Embryophyta) examined. Our protocols can be used to provide RNA of suitable stability, quantity, and quality for transcriptome sequencing.

  16. Efficient method for the extraction of genomic DNA from wormwood ...

    African Journals Online (AJOL)

    Suitable method for isolation of genomic DNA is really important. The best method can make the best result for genetic study. About five differences methods were used amongst which were Sarkosyl Method, CTAB method, Kit Method, SDS Method and Phenol-Chloroform Method. Isolated genomic DNA showed high purity ...

  17. Distribution of Interstitial Cells of Cajal in the Esophagus of Fetal Rats with Esophageal Atresia

    Directory of Open Access Journals (Sweden)

    Caner Isbir

    2016-04-01

    Full Text Available Aim: Scarcity of the interstitial cells of Cajal (ICC is related to motility disorders. In the study, we aimed to evaluate the number and density of ICCs in the fetal rat esophagus in the adriamycin - esophageal atresia (EA model. Material and Method: Rat fetuses were divided into three groups as a control, adriamycin group without EA and adriamycin group with EA. Four doses of adriamycin, 2 mg/kg each, were injected intraperitoneally to the adriamycin group rats between on 6 and 9 days of gestation. The presence of ICCs in the esophagus of the rat fetuses was determined by using an immunohistochemistry technique (c-kit, CD117. The average numbers of ICCs were calculated with microscopic evaluation by using a visual scoring system (range1 to 3. Results: Seven fetuses were included in each group. The ICCs score 3 distributions of fetuses were 5 (72% fetuses in the control group, 3 (43% fetuses in the adriamycin group without EA, 1 (14% fetus in the adriamycin group with EA. It have been found that there was a marked reduction of ICCs distribution in the adriamycin group with EA compared to control group (p 0.05. Discussion: ICCs density was significantly decreased in the rat fetuses with EA compared to the fetuses without EA. These findings support the idea that ICCs density may be congenitally abnormal in EA. This may be led to dismotility seen in the operated esophagus due to EA.

  18. Cell biological aspects of drug-resistance in human small cell lung carcinoma cells

    NARCIS (Netherlands)

    Jong, Steven de

    1991-01-01

    Adriamycin and CDDP are effective chemotherapeutic agents for the treatment of a variety of human cancers. However, the development of resistance to these drugs is a major cause of treatment failure. In this thesis, mechanisms involved in the resistance to adriamycin or CDDP and ways to reverse

  19. Characteristics of TBS-extractable hyperphosphorylated tau species: Aggregation intermediates in rTg4510 mouse brain

    Science.gov (United States)

    Sahara, Naruhiko; DeTure, Michael; Ren, Yan; Ebrahim, Abdul-Shukkur; Kang, Dongcheul; Knight, Joshua; Volbracht, Christiane; Pedersen, Jan Torleif; Dickson, Dennis W.; Yen, Shu-Hui; Lewis, Jada

    2012-01-01

    Conditional overexpression of four-repeat human tau containing the P301L missense mutation in the rTg4510 mouse model of tauopathy leads to progressive accumulation of neurofibrillary tangles and hyperphosphorylated, sarkosyl-insoluble tau species, which are biochemically comparable to abnormal tau characteristic of hereditary tauopathies termed FTDP-17. To fully understand the impact of tau species at different stages of self-assembly on neurodegeneration, we fractionated rTg4510 brain representing several stages of tauopathy to obtain TBS-extractable (S1), high salt/sarkosyl-extractable (S3), and sarkosyl-insoluble (P3) fractions. Under reducing condition, the S1 fraction was demonstrated by Western blotting to contain both 50–60 kDa normally-sized and 64 kDa tau. Both are thermo-stable, but the 64 kDa tau showed a higher degree of phosphorylation. Under non-reducing condition, nearly all TBS-extractable 64 kDa tau were detected as ~130 kDa species consistent with the size of dimer. Quantitative analysis showed ~80 times more 64 kDa tau in S1 than P3 fraction. Immunoelectron microscopy revealed tau-positive granules/short filaments in S1 fraction. These structures displayed MC1 immunoreactivities indicative of conformational/pathological change of tau. MC1 immunoreactivity was detected by dot blotting in samples from 2.5 month-old mice, whereas Ab39 immunoreactivity indicative of late stages of tau assembly was detected only in P3 fraction. Quantitative analysis also demonstrated a significant inverse correlation between brain weight and 64 kDa tau, but the level of TBS-extractable 64 kDa tau reflects neurodegeneration better than that of sarkosyl-insoluble 64 kDa tau. Together, the findings suggest that TBS-extractable 64 kDa tau production is a potential target for therapeutic intervention of tauopathies. PMID:22941973

  20. Deregulation upon DNA damage revealed by joint analysis of context-specific perturbation data

    Directory of Open Access Journals (Sweden)

    Biecek Przemysław

    2011-06-01

    Full Text Available Abstract Background Deregulation between two different cell populations manifests itself in changing gene expression patterns and changing regulatory interactions. Accumulating knowledge about biological networks creates an opportunity to study these changes in their cellular context. Results We analyze re-wiring of regulatory networks based on cell population-specific perturbation data and knowledge about signaling pathways and their target genes. We quantify deregulation by merging regulatory signal from the two cell populations into one score. This joint approach, called JODA, proves advantageous over separate analysis of the cell populations and analysis without incorporation of knowledge. JODA is implemented and freely available in a Bioconductor package 'joda'. Conclusions Using JODA, we show wide-spread re-wiring of gene regulatory networks upon neocarzinostatin-induced DNA damage in Human cells. We recover 645 deregulated genes in thirteen functional clusters performing the rich program of response to damage. We find that the clusters contain many previously characterized neocarzinostatin target genes. We investigate connectivity between those genes, explaining their cooperation in performing the common functions. We review genes with the most extreme deregulation scores, reporting their involvement in response to DNA damage. Finally, we investigate the indirect impact of the ATM pathway on the deregulated genes, and build a hypothetical hierarchy of direct regulation. These results prove that JODA is a step forward to a systems level, mechanistic understanding of changes in gene regulation between different cell populations.

  1. Purification and partial characterization of the major outer membrane protein of Chlamydia trachomatis

    Energy Technology Data Exchange (ETDEWEB)

    Caldwell, H.D.; Kromhout, J.; Schachter, J.

    1981-03-01

    Elementary bodies (EB) of Chlamydia trachomatis serotypes C, E, and L2 were extrinsically radioiodinated, and whole-cell lysates of these serotypes were compared by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). Autoradiography of the polypeptide profiles identified a major surface protein with an apparent subunit molecular weight of 39,500 that was common to each C. trachomatis serotype. The abilities of nonionic (Triton X-100), dipolar ionic (Zwittergent TM-314), mild (sodium deoxycholate and sodium N-lauroyl sarcosine), and strongly anionic (SDS) detergents to extract this protein from intact EB of the L2 serotype were investigated by SDS-PAGE analysis of the soluble and insoluble fractions obtained after each detergent treatment. Only SDS readily extracted this protein from intact EB. Sarkosyl treatment selectively solubilized the majority of other EB proteins, leaving the 39,500-dalton protein associated with the Sarkosyl-insoluble fraction. Ultrastructural studies of the Sarkosyl-insoluble EB pellet showed it to consist of empty EB particles possessing an apparently intact outer membrane. No structural evidence for a peptidoglycan-like cell wall was found. Morphologically these chlamydial outer membrane complexes (COMC) resembled intact chlamydial EB outer membranes. The 39,500-dalton outer membrane protein was quantitatively extracted from COMC by treating them with 2% SDS at 60 degrees C. This protein accounted for 61% of the total COMC-associated protein, and its extraction resulted in a concomitant loss of the COMC membrane structure and morphology. The 39,500-dalton major outer membrane protein is a serogroup antigen of C. trachomatis organisms.

  2. Pituitary adenylate cyclase-activating polypeptide (PACAP in zebrafish models of nephrotic syndrome.

    Directory of Open Access Journals (Sweden)

    Benedicte Eneman

    Full Text Available Pituitary adenylate cyclase-activating polypeptide (PACAP is an inhibitor of megakaryopoiesis and platelet function. Recently, PACAP deficiency was observed in children with nephrotic syndrome (NS, associated with increased platelet count and aggregability and increased risk of thrombosis. To further study PACAP deficiency in NS, we used transgenic Tg(cd41:EGFP zebrafish with GFP-labeled thrombocytes. We generated two models for congenital NS, a morpholino injected model targeting nphs1 (nephrin, which is mutated in the Finnish-type congenital NS. The second model was induced by exposure to the nephrotoxic compound adriamycin. Nephrin RNA expression was quantified and zebrafish embryos were live-screened for proteinuria and pericardial edema as evidence of renal impairment. Protein levels of PACAP and its binding-protein ceruloplasmin were measured and GFP-labeled thrombocytes were quantified. We also evaluated the effects of PACAP morpholino injection and the rescue effects of PACAP-38 peptide in both congenital NS models. Nephrin downregulation and pericardial edema were observed in both nephrin morpholino injected and adriamycin exposed congenital NS models. However, PACAP deficiency was demonstrated only in the adriamycin exposed condition. Ceruloplasmin levels and the number of GFP-labeled thrombocytes remained unchanged in both models. PACAP morpholino injections worsened survival rates and the edema phenotype in both congenital NS models while injection with human PACAP-38 could only rescue the adriamycin exposed model. We hereby report, for the first time, PACAP deficiency in a NS zebrafish model as a consequence of adriamycin exposure. However, distinct from the human congenital NS, both zebrafish models retained normal levels of ceruloplasmin and thrombocytes. We further extend the renoprotective effects of the PACAP-38 peptide against adriamycin toxicity in zebrafish.

  3. Global DNA hypermethylation-associated cancer chemotherapy resistance and its reversion with the demethylating agent hydralazine

    Directory of Open Access Journals (Sweden)

    Benitez-Bribiesca Luis

    2006-08-01

    Full Text Available Abstract Background The development of resistance to cytotoxic chemotherapy continues to be a major obstacle for successful anticancer therapy. It has been shown that cells exposed to toxic concentrations of commonly used cancer chemotherapy agents develop DNA hypermetylation. Hence, demethylating agents could play a role in overcoming drug resistance. Methods MCF-7 cells were rendered adriamycin-resistant by weekly treatment with adriamycin. Wild-type and the resulting MCF-7/Adr cells were analyzed for global DNA methylation. DNA methyltransferase activity and DNA methyltransferase (dnmt gene expression were also determined. MCF-7/Adr cells were then subjected to antisense targeting of dnmt1, -3a, and -b genes and to treatment with the DNA methylation inhibitor hydralazine to investigate whether DNA demethylation restores sensitivity to adriamycin. Results MCF-7/Adr cells exhibited the multi-drug resistant phenotype as demonstrated by adriamycin resistance, mdr1 gene over-expression, decreased intracellular accumulation of adriamycin, and cross-resistance to paclitaxel. The mdr phenotype was accompanied by global DNA hypermetylation, over-expression of dnmt genes, and increased DNA methyltransferase activity as compared with wild-type MCF-7 cells. DNA demethylation through antisense targeting of dnmts or hydralazine restored adriamycin sensitivity of MCF-7/Adr cells to a greater extent than verapamil, a known inhibitor of mdr protein, suggesting that DNA demethylation interferes with the epigenetic reprogramming that participates in the drug-resistant phenotype. Conclusion We provide evidence that DNA hypermethylation is at least partly responsible for development of the multidrug-resistant phenotype in the MCF-7/Adr model and that hydralazine, a known DNA demethylating agent, can revert the resistant phenotype.

  4. [Combination chemotherapy of experimental leukemia].

    Science.gov (United States)

    Emanuel', N M; Konovalova, N P; D'iachkovskaia, R F

    1977-01-01

    In the present work an attempt was made to gain greater therapeutic effect of diazane coupled with adriamycin and sarcolysin. Leucemias L-1210 and La served as a model. In leucosis La diazane was injected once in 5 days. Either an additional injection of adriamycin two days prior to diazane injection or sarcolysin injected simultaneously with diazane enabled the authors to obtain a distinct synergestic effect. In leucemia L-1210 a simultaneous administration of diazane and sarcolysin also contributes to considerably longer survival of leucemic animals. Such combinations are likely to be promising in their clinical use.

  5. Genome sequencing and annotation of Amycolatopsis azurea DSM 43854T

    Directory of Open Access Journals (Sweden)

    Indu Khatri

    2014-12-01

    Full Text Available We report the 9.2 Mb genome of the azureomycin A and B antibiotic producing strain Amycolatopsis azurea isolated from a Japanese soil sample. The draft genome of strain DSM 43854T consists of 9,223,451 bp with a G + C content of 69.0% and the genome contains 3 rRNA genes (5S–23S–16S and 58 aminoacyl-tRNA synthetase genes. The homology searches revealed that the PKS gene clusters are supposed to be responsible for the biosynthesis of naptomycin, macbecin, rifamycin, mitomycin, maduropeptin enediyne, neocarzinostatin enediyne, C-1027 enediyne, calicheamicin enediyne, landomycin, simocyclinone, medermycin, granaticin, polyketomycin, teicoplanin, balhimycin, vancomycin, staurosporine, rubradirin and complestatin.

  6. Transmission of Soluble and Insoluble α-Synuclein to Mice

    Science.gov (United States)

    Jones, Daryl R.; Delenclos, Marion; Baine, AnnMarie T.; DeTure, Michael; Murray, Melissa E.; Dickson, Dennis W.; McLean, Pamela J.

    2015-01-01

    The neurodegenerative synucleinopathies, which include Parkinson disease, multiple system atrophy, and Lewy body disease, are characterized by the presence of abundant neuronal inclusions called Lewy bodies and Lewy neurites. These disorders remain incurable and a greater understanding of the pathologic processes is needed for effective treatment strategies to be developed. Recent data suggest that pathogenic misfolding of the presynaptic protein, α-synuclein (α-syn), and subsequent aggregation and accumulation is fundamental to the disease process. It is hypothesized that the misfolded isoform is able to induce misfolding of normal endogenous α-syn, much like what occurs in the prion diseases. Recent work highlighting the seeding effect of pathogenic α-syn has largely focused on the detergent-insoluble species of the protein. In this study we performed intracerebral inoculations of the sarkosyl-insoluble or sarkosyl-soluble fractions of human Lewy body disease brain homogenate and show that both fractions induce CNS pathology in mice at 4 months post-injection. Disease-associated deposits accumulated both near and distal to the site of the injection suggesting a cell-to-cell spread via recruitment of α-syn. These results provide further insight into the prion-like mechanisms of α-syn and suggest that disease-associated α-syn is not homogenous within a single patient but might exist in both soluble and insoluble isoforms. PMID:26574670

  7. Annual Research Progress Report for Fiscal Year 1983,

    Science.gov (United States)

    1983-10-01

    knee- ligament injuries involving the anterior cruciate ligament , with or without injuries to the medial collateral ligament , lateral collateral ligament ...investigational device, carbon fiber bioprosthesis for the anterior cruciate ligament . They are randomly selected for this device in comparison to...Stage IB and Randomly Assigned Radiation Therapy versus No Further Therapy in Selected Patients. (0) GOG 50 A Study of Adriamycin as Postoperative

  8. EBV-positive immunodeficiency lymphoma after alemtuzumab-CHOP therapy for peripheral T-cell lymphoma

    NARCIS (Netherlands)

    Kluin-Nelemans, Hanneke C.; Coenen, Jules L.; Boers, James E.; van Imhoff, Gustaaf W.; Rosati, Stefano

    2008-01-01

    Chemotherapy with alemtuzumab and the combination of cyclophosphamide, adriamycin, oncovin, and prednisone (CHOP) has become experimental trial therapy for aggressive T-cell lymphoma. Several multicenter phase 3 trials; will incorporate this scheme. As part of an ongoing phase 2 trial in which we

  9. The role of lipid peroxidation in the nephrotoxicity of cisplatin

    NARCIS (Netherlands)

    Vermeulen, N P; Baldew, G S

    1992-01-01

    The possible role of lipid peroxidation in the nephrotoxicity of the antitumour drug cisplatin was studied in vitro. In contrast to Adriamycin, cisplatin did not induce lipid peroxidation in rat kidney microsomes containing a NADPH-generating system. Pretreatment of rat kidney microsomes with

  10. Effect of glutathione S-transferases on the survival of patients with acute myeloid leukaemia

    DEFF Research Database (Denmark)

    Autrup, Judith; Hokland, Peter; Pedersen, Lars

    2002-01-01

    The objective of the study was to investigate the effect of genetic polymorphisms in glutathione S-transferases (GST) on the survival of acute myeloid leukaemia patients receiving adriamycin induction therapy. A total of 89 patients were included in the study. Patients who carried at least one GS...

  11. December2006 EAST AFRICAN MEDICAL JOURNAL 679

    African Journals Online (AJOL)

    2006-12-01

    Dec 1, 2006 ... in recurrence rate are associated with reductions in progression rate. Some studies appear to show a definite benefit of BCG immunotherapy over intravesical chemotherapy with adriamycin, however, studies from Europe show no difference between BCG and mitomycin С in the reduction of recurrence rate ...

  12. Multiple myeloma: 2 case reports | Olayemi | Nigerian Journal of ...

    African Journals Online (AJOL)

    She also had cough productive of mucoid sputum. The diagnosis of MM was confirmed by the presence of more than 30 % neoplastic plasma cells in the bone marrow, a monoclonal band on serum electrophoresis and lytic lesions in the pelvic bones on skeletal survey. She had three 28-day cycles of vincristine, adriamycin ...

  13. Consequences of chemoresistance for the herpes simplex virus thymidine kinase/ganciclovir-induced bystander effect in a human small cell lung cancer cell line model

    NARCIS (Netherlands)

    Van Dillen, IJ; Mulder, NH; Sluiter, WJ; Meijer, C; De Jong, S; Loncarek, J; Mesnil, M; De Vries, EFJ; Vaalburg, W; Hospers, GAP

    2005-01-01

    This paper focuses on the influence of chemoresistance on the herpes simplex virus (HSVtk)/ganciclovir (GCV)-induced bystander effect (BE), as studied in a human small cell lung cancer (SCLC) cell line (GLC(4)) and its sublines with in vitro acquired resistance to adriamycin (GLC(4)/ADR),

  14. Optical coherence tomography (OCT) of a murine model of chronic kidney disease

    Science.gov (United States)

    Wang, Hsing-Wen; Guo, Hengchang; Andrews, Peter M.; Anderson, Erik; Chen, Y.

    2015-03-01

    Chronic Kidney Disease (CKD) is characterized by a progressive loss in renal function over time. Pathology can provide valuable insights into the progression of CKD by analyzing the status of glomeruli and the uriniferous tubules over time. Optical coherence tomography (OCT) is a new procedure that can analyze the microscopic structure of the kidney in a non-invasive manner. This is especially important because there are significant artifacts associated with excision biopsies and immersion fixation procedures. Recently, we have shown that OCT can provide real time images of kidney microstructure and Doppler OCT (DOCT) can image glomerular renal blood flow in vivo without administrating exogenous contrast agents. In this study, we used OCT to evaluate CKD in a model induced by intravenous Adriamycin injection into Munich-Wistar rats. We evaluated tubular density and tubular diameter from OCT images at several post- Adriamycin induction time points and compared them with conventional light microscopic histological imaging. Proteinurea and serum creatinine were used as physiological markers of the extent of CKD. Preliminary OCT results revealed changes in tubular density due to tubular necrosis and interstitial fibrosis within the first 4 weeks following Adriamycin injection. From week 4 to 8 after Adriamycin induction, changes in tubular density and diameter occurred due to both tubular loss and tubular dilation. The results suggest OCT can provide additional information about kidney histopathology in CKD. DOCT revealed reduced blood flow in some glomeruli probably as a consequence of focal glomerularsclerosis.

  15. Kaposi's sarcoma: Good outcome with doxorubicin, bleomycin and ...

    African Journals Online (AJOL)

    We prospectively treated 12 patients with an institutional review board-approved protocol consisting of four monthly courses of doxorubicin (Adriamycin), bleomycin and vincristine sulphate (ABV), with highly active antiretroviral therapy (HAART) plus co-trimoxazole prophylaxis for those who were HIV-positive, with ...

  16. Ameliorative effect of Draba nemorosa extract on chronic heart ...

    African Journals Online (AJOL)

    Purpose: To evaluate the effect of Draba nemorosa extract (DNE) on oxidative stress and hemodynamics in rats with chronic congestive heart failure (CHF). Methods: Adriamycin was used to establish CHF in Sprague Dawley (SD) rat model. Six groups of SD rats were used in this study: control group, CHF group, captopril ...

  17. Untitled

    African Journals Online (AJOL)

    2001-07-07

    Jul 7, 2001 ... Nyong'o, MD, Chief of Pathology, Nairobi Hospital and R. Baraza,. MBChB, M ed, FRCS, Consultant Surgeon, Nairobi Hospital, P.0. Box 30026 ... Design: Restrospective analysis of nadir neutrophil counts in female mammary carcinoma patients treated with adriamycin/cyclophosphamide combination.

  18. MR Guided Pulsed High Intensity Focused Ultrasound Enhancement of Gene Therapy Combined with Androgen Deprivation and Radiotherapy for Prostate Cancer Treatment

    Science.gov (United States)

    2012-09-01

    with a concentration of 12 μl/ mg for tumor sample digestion . The vial was suspended in a water bath at a temperature of 55 °C for 1 h. The vial was...Plasma pharmacokinetics of adriamycin and adriamycinol—Implications for the design of invitro experiments and treatment protocols,” Cancer Res. 43, 3417

  19. Antagonism of HSV-tk transfection and ganciclovir treatment on chemotherapeutic drug sensitivity

    NARCIS (Netherlands)

    Van Dillen, IJ; Mulder, NH; Meijer, C; Dam, WA; Kamstra, E; De Vries, L; Meersma, GJ; Van Der Zee, AGJ; De Vries, EFJ; Vaalburg, W; Hospers, GAP

    Our study focused on the influence of herpes simplex virus thymidine kinase (HSV-tk) expression and ganciclovir (GCV) treatment on the sensitivity of C6 glioma cells to frequently used chemotherapeutic drugs, i.e. adriamycin (ADR), cisplatin (CDDP), 5-fluorouracil (5-FU), and methotrexate (MTX).

  20. Mediastinal and peripheral lymphadenopathy | Elatiqi | Pan African ...

    African Journals Online (AJOL)

    The regimen was based on two months of ethambutol, rifampicin, pyrazinamide and isoniazid, followed by four months of rifampicin and isoniazid. He received also chemotherapy with cyclophosphamide, adriamycin, vincristine and prednisolone. The patient presented, two months later with clinical and radiographic ...

  1. Albumin-heparin microspheres as carriers for cytostatic agents

    NARCIS (Netherlands)

    Cremers, Harry; Feijen, Jan; Kwon, G.; Bae, Y.H.; Kim, S.W.; Noteborn, H.P.J.M.; Mcvie, J.G.

    1990-01-01

    Much work has been done on adriamycin-loaded albumin microspheres (Alb-MS) for chemoembolization [1–4], the rationale being that site-specific drug delivery may increase the therapeutic efficacy of the drug. Alb-Ms are being investigated because of their biocompatibility and because the degradation

  2. Annual Research Progress Report, Fiscal Year 1988. Volume 2. (Brooke Army Medical Center)

    Science.gov (United States)

    1988-10-01

    cura ~le treatment. Patients with a cumulative dose of Adriamycin > 250 mq/m are not eligible for this study. allowable prior chemotherapy depends on...obtain estimates of mortality at five years. 2) To determine whether histologic criteria or pattern of spread can be used to distinguish subsets of

  3. Effects of c-myc oncogene modulation on drug resistance in human small cell lung carcinoma cell lines

    NARCIS (Netherlands)

    vanWaardenburg, RCAM; Meijer, C; Uges, DRA; deVries, EGE; Mulder, NH

    1996-01-01

    Small cell lung carcinoma (SCLC) is characterized by rapid development of resistance to drugs, such as cis-diamminedichloroplatinum(II) (cDDP) and anthracyclines. The molecular basis for resistance to cDDP and adriamycin (Adr) is poorly understood. One of the genetic alterations observed in SCLC,

  4. Lipopolysaccharide-pretreated plasmacytoid dendritic cells ameliorate experimental chronic kidney disease.

    Science.gov (United States)

    Zheng, Dong; Cao, Qi; Lee, Vincent W S; Wang, Ya; Zheng, Guoping; Wang, YuanMin; Tan, Thian Kui; Wang, Changqi; Alexander, Stephen I; Harris, David C H; Wang, Yiping

    2012-05-01

    Plasmacytoid dendritic cells play important roles in inducing immune tolerance, preventing allograft rejection, and regulating immune responses in both autoimmune disease and graft-versus-host disease. In order to evaluate a possible protective effect of plasmacytoid dendritic cells against renal inflammation and injury, we purified these cells from mouse spleens and adoptively transferred lipopolysaccharide (LPS)-treated cells, modified ex vivo, into mice with adriamycin nephropathy. These LPS-treated cells localized to the kidney cortex and the lymph nodes draining the kidney, and protected the kidney from injury during adriamycin nephropathy. Glomerulosclerosis, tubular atrophy, interstitial expansion, proteinuria, and creatinine clearance were significantly reduced in mice with adriamycin nephropathy subsequently treated with LPS-activated plasmacytoid dendritic cells as compared to the kidney injury in mice given naive plasmacytoid dendritic cells. In addition, LPS-pretreated cells, but not naive plasmacytoid dendritic cells, convert CD4+CD25- T cells into Foxp3+ regulatory T cells and suppress the proinflammatory cytokine production of endogenous renal macrophages. This may explain their ability to protect against renal injury in adriamycin nephropathy.

  5. Ameliorative effect of Draba nemorosa extract on chronic heart ...

    African Journals Online (AJOL)

    Sent for review: 27 October 2016. Revised accepted: 7 August 2017. Abstract. Purpose: To evaluate the effect of Draba nemorosa extract (DNE) on oxidative stress and hemodynamics in rats with chronic congestive heart failure (CHF). Methods: Adriamycin was used to establish CHF in Sprague Dawley (SD) rat model.

  6. Antitumor efficacy of TRA-8 anti-DR5 monoclonal antibody alone or in combination with chemotherapy and/or radiation therapy in a human breast cancer model.

    Science.gov (United States)

    Buchsbaum, Donald J; Zhou, Tong; Grizzle, William E; Oliver, Patsy G; Hammond, Charlotte J; Zhang, Sijian; Carpenter, Mark; LoBuglio, Albert F

    2003-09-01

    A monoclonal antibody (TRA-8) has been developed that binds to death receptor 5 (DR5), one of two death receptors bound by tumor necrosis factor-related apoptosis-inducing ligand. The purpose of this study was to evaluate in vitro the binding and cytotoxicity of TRA-8 to human breast cancer cell lines. The antitumor efficacy of TRA-8 was evaluated in a xenograft human breast cancer murine model, as a single agent and in combination with chemotherapy or radiation therapy. Anti: The binding of TRA-8 to a panel of nine human breast cancer cell lines was evaluated by indirect immunofluorescence and flow cytometry. Cytotoxicity of TRA-8 alone and in the presence of Adriamycin or paclitaxel was measured in vitro using the ATP-lite assay. Antitumor efficacy was determined by treatment of nude mice bearing well-established s.c. DR5-positive 2LMP human breast cancer xenografts with TRA-8 alone or in combination with Adriamycin or paclitaxel. Tumor size and regression rates were determined. In addition, a study was carried out with TRA-8 and Adriamycin in combination with 3 Gy (60)Co irradiation of 2LMP xenografts on days 9 and 17. All nine human breast cancer cell lines expressed DR5 with TRA-8 reactivity varying from strongly to weakly positive. Four cell lines were sensitive to TRA-8 cytotoxicity with IC(50) of 17-299 ng/ml, whereas other cell lines had weak cytotoxicity or were resistant. In vivo studies demonstrated significant inhibition of growth of 2LMP xenografts by TRA-8 treatment alone. The combination of TRA-8 + Adriamycin or paclitaxel produced significant inhibition of tumor growth as compared with controls or either agent alone. An aggregate analysis of all 166 animals studied demonstrated that TRA-8 alone or in combination with Adriamycin, paclitaxel, or radiation produced a significant increase in tumor doubling time compared with any modality alone with mean doubling time in days of 12 (untreated), 14 (radiation), 17 (Adriamycin), 25 (paclitaxel), 39

  7. Determinación de las mejores condiciones para la extracción de la lectina de raíz de haba (vicia faba)

    OpenAIRE

    Navarro, Y.; Pérez, G

    2010-01-01

    Para la determinación de las mejores condiciones de extracción de la lectina de raíz de haba (LRH), se utilizaron iniciaimente raíces enteras y paredes celulares de raíces. De acuerdo con los resultados, se establecieron las condiciones experimentales para la preparación de paredes celulares por tres métodos. Se encontró que el Método I, en el cual se usó Sarkosyl 0.5%, KH2PO4 0.01 M pH 6.0 para la obtención de paredes celulares y luego se extrajo la lectina con buffer de citrato de sodio 0.1...

  8. Proteomic and genomic analysis reveals novel Campylobacter jejuni outer membrane proteins and potential heterogeneity

    Directory of Open Access Journals (Sweden)

    Eleanor Watson

    2014-09-01

    Full Text Available Gram-negative bacterial outer membrane proteins play important roles in the interaction of bacteria with their environment including nutrient acquisition, adhesion and invasion, and antibiotic resistance. In this study we identified 47 proteins within the Sarkosyl-insoluble fraction of Campylobacter jejuni 81-176, using LC–ESI-MS/MS. Comparative analysis of outer membrane protein sequences was visualised to reveal protein distribution within a panel of Campylobacter spp., identifying several C. jejuni-specific proteins. Smith–Waterman analyses of C. jejuni homologues revealed high sequence conservation amongst a number of hypothetical proteins, sequence heterogeneity of other proteins and several proteins which are absent in a proportion of strains.

  9. Determinación de las mejores condiciones para la extracción de la lectina de raíz de haba (vicia faba

    Directory of Open Access Journals (Sweden)

    Y. De navarro

    2010-07-01

    Full Text Available Para la determinación de las mejores condiciones de extracción de la lectina de raíz de haba (LRH, se utilizaron iniciaimente raíces enteras y paredes celulares de raíces. De acuerdo con los resultados, se establecieron las condiciones experimentales para la preparación de paredes celulares por tres métodos. Se encontró que el Método I, en el cual se usó Sarkosyl 0.5%, KH2PO4 0.01 M pH 6.0 para la obtención de paredes celulares y luego se extrajo la lectina con buffer de citrato de sodio 0.1 M pH 4.2, es el más adecuado. El fraccionamiento se realizó por filtración por gel usando Sephadex G-25.

  10. Concentration-dependent Effects of Proteasomal Inhibition on tau Processing in a Cellular Model of Tauopathy

    Science.gov (United States)

    Hamano, Tadanori; Gendron, Tania F.; Ko, Li-wen; Yen, Shu-Hui

    2009-01-01

    Tauopathies are characterized by accumulation of filamentous tau aggregates. These aggregates can be recapitulated in transfectant M1C overproducing wild-type human brain tau 4R0N via the tetracycline off (TetOff) inducible expression mechanism. To determine the contribution of proteasomes to tau degradation and aggregation, we exposed M1C cells to epoxomicin (Epx; 2-50 nM) or MG132 (0.5 μM) on the 3rd or 4th day of a 5-day TetOff induction and demonstrated a reduction of proteasomal activity. Cultures treated with 2 nM Exp showed accumulation of full-length tau without affecting ubiquitin and β-catenin immunoblotting profiles. In contrast, cells treated with 10, 50 nM Epx or MG132 displayed changes in ubiquitin or β-catenin immunoblotting profiles and extensive tau degradation/truncation. The increase of tau degradation/truncation was accompanied with accumulation of oligomers and sarkosyl-insoluble aggregates of tau, augmented thioflavin-binding and activation of caspases and calpains. Truncated, oligomeric and sarkosyl-insoluble tau derivatives appeared with caspase-specific cleavage and their production was diminished when pretreated with a pan-caspase inhibitor. The results demonstrate (i) a dose-dependent, opposite effect of proteasome inhibition on tau processing, (ii) the participation of proteasome-dependent, ubiquitination-independent mechanisms in tau degradation and aggregation, and (iii) the promotion of tau aggregation by caspase-mediated tau degradation/truncation. PMID:19636403

  11. N-methylcarbamate derivatives of ellipticine and olivacine with cytotoxic activity against four human lung cancer cell lines.

    Science.gov (United States)

    Ruckdeschel, J C; Modi, S P; el-Hamouly, W; Portuese, E; Archer, S

    1992-12-25

    A series of analogues of the antitumor alkaloids ellipticine and olivacine were tested for cytotoxicity against four human lung cancer cell lines: H69, N417, H460, and H358. Adriamycin (doxorubicin), ellipticine, olivacine, and celiptinium were used as standards. Adriamycin was cytotoxic at 2 microM and celiptinium was inactive at the highest concentrations tested (IC50 > 48 microM). N-methylcarbamates of 9-methoxy-6H-pyrido[4,3-b]carbazole 1-,5-, and 11-methanols gave IC50 values ranging from 0.02 to 0.11 microM against N417, H460, and H358 and were only slightly less effective against H69.

  12. Novel nano drug delivery systems for hepatic tumor

    Science.gov (United States)

    Cao, Yu; Liu, Jing; Ma, Hong; Bai, Jing; Qi, Chao

    2009-08-01

    The adriamycin and galactose was grafted to dextran. The novel nanopartcile drug delivery system (DDS) was prepared from the chemical modified polysaccharide by the dialysis. The content of the ADR moiety in the polymeric-drug conjugate was about 2 mol%. The size and morphology of prepared nanoparticles were characterized using dynamic light scattering and transmission electron microscope. The results showed that the nanoparticles were spherical and their size was less than 200 nm. In vitro cytotoxicity of the nanoparticles was tested by the MTT assay. The nano DDS has similar cytotoxicity as free adriamycin for incubation with HepG2 cells. In contrast, for the incubation with Hela cells of the DDS, there was no signicant cytotoxicity change.

  13. Study of multidrug resistance and radioresistance

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Yoon Koo; Yoo, Young Do

    1999-04-01

    We investigated the mechanism of 5-FU, adriamycin, radiation resistance in Korean gastric cancer cells. First we investigated the relation between Rb and multidrug resistance. Rb stable transfectants exhibited 5- to 10- fold more resistance to adriamycin than the control cells. These Rb transfectants showed increased MDR1 expression. We also investigated up-regulation in radiation-resistant tumor tissues. HSP27, MRP-8, GST, and NKEF-B were up-regulated in radiation resistant tumor. Expression of NKEF-B was also increased by radiation exposure in Head and Neck cells. These results demonstrated that NKEF-B is a stress response protein and it may have an important role in radiation resistance.

  14. Nkx2.5 enhances the efficacy of mesenchymal stem cells transplantation in treatment heart failure in rats.

    Science.gov (United States)

    Deng, Bo; Wang, Jin Xin; Hu, Xing Xing; Duan, Peng; Wang, Lin; Li, Yang; Zhu, Qing Lei

    2017-08-01

    The aim of this study is to determine whether Nkx2.5 transfection of transplanted bone marrow mesenchymal stem cells (MSCs) improves the efficacy of treatment of adriamycin-induced heart failure in a rat model. Nkx2.5 was transfected in MSCs by lentiviral vector transduction. The expressions of Nkx2.5 and cardiac specific genes in MSCs and Nkx2.5 transfected mesenchymal stem cells (MSCs-Nkx2.5) were analyzed with quantitative real-time PCR and Western blot in vitro. Heart failure models of rats were induced by adriamycin and were then randomly divided into 3 groups: injected saline, MSCs or MSCs-Nkx2.5 via the femoral vein respectively. Four weeks after injection, the cardiac function, expressions of cardiac specific gene, fibrosis formation and collagen volume fraction in the myocardium as well as the expressions of GATA4 and MEF2 in rats were analyzed with echocardiography, immunohistochemistry, Masson staining, quantitative real-time PCR and Western blot, respectively. Nkx2.5 enhanced cardiac specific gene expressions including α-MHC, TNI, CKMB, connexin-43 in MSCs-Nkx2.5 in vitro. Both MSCs and MSCs-Nkx2.5 improved cardiac function, promoted the differentiation of transplanted MSCs into cardiomyocyte-like cells, decreased fibrosis formation and collagen volume fraction in the myocardium, as well as increased the expressions of GATA4 and MEF2 in adriamycin-induced rat heart failure models. Moreover, the effect was much more remarkable in MSCs-Nkx2.5 than in MSCs group. This study has found that Nkx2.5 enhances the efficacy of MSCs transplantation in treatment adriamycin-induced heart failure in rats. Nkx2.5 transfected to transplanted MSCs provides a potential effective approach to heart failure. Copyright © 2017 Elsevier Inc. All rights reserved.

  15. Efficacy of Intra-arterial Norcantharidin in Suppressing Tumour 14C-labelled Glucose Oxidative Metabolism in rat Morris Hepatoma

    Directory of Open Access Journals (Sweden)

    Peter Mack

    1996-01-01

    Full Text Available Norcantharidin is the demethylated form of Cantharidin, which is the active ingredient of the blister beetle, Mylabris, a long used Chinese traditional medicine. Though not well publicised outside China, Norcantharidin is known to possess significant anti-hepatoma activity, and is relatively free from side effects. In the present study, glucose oxidation in tumour and liver tissue slices harvested from hepatomabearing animals was quantified by measuring the radioactivity of 14C-labelled CO released from 14C-glucose in oxygen-enriched incubation medium. Results were expressed asa tumour/liver ratio. For comparison, treatments with Norcantharidin, Adriamycin and with hepatic artery ligation were studied. The mean tumour/liver ratio was 4.2+2.2 in untreated controls, but dropped significantly to 2.3+0.5 (p<0.05 with intra-arterial Norcantharidin (0.5 mg/kg and to 2.3+0.7 (p<0.05 with intra-arterial Adriamycin (2.4 mg/kg, and to 2.2+0.7 (p<0.05 with hepatic artery ligation. However, with intravenous Adriamycin at 2.4 mg/kg, the mean tumour/liver ratio was reduced to only 3.5+2.0 and was not significantly different from untreated controls. It is concluded that intra-arterial Norcantharidin is as effective as intraarterial Adriamycin and hepatic artery ligation in suppressing tumour glucose oxidative metabolism. These results imply that Norcantharidin may have a role to play in the chemotherapy ofprimary livercancer.

  16. The delivery of protein into living cells by use of membrane fusible erythrocyte ghosts.

    Science.gov (United States)

    Kogure, K; Itoh, T; Okuda, O; Hayashi, K; Ueno, M

    2000-12-04

    We examined the effects of pretreatment of monkey kidney normal cells (CV-1) and human cervical tumor cells (HeLa) with membrane fusible erythrocyte ghosts (MFEG) encapsulating superoxide dismutase (SOD-MFEG) on adriamycin (ADM) cytotoxicity. The decrease in CV-1 cells with ADM was inhibited markedly, and the initiation of decrease in HeLa cells was delayed for 2 days by the pretreatment with SOD-MFEG, indicating that the delivered SOD held the activity in the cells.

  17. Enhancing Anti-Breast Cancer Immunity by Blocking Death Receptor DR5

    Science.gov (United States)

    2008-09-01

    Oligofectamine ( Invitro - gen). After 3 d, transfected cells were left untreated or treated with MS275 (5 Amol/L), Adriamycin (0.1 Ag/mL), or their combination...s, 45jC/30 s, and 68jC/2 min; followed by 68jC/7 min for the final extension. The amplified fragment was isolated from 1% agarose gel, digested with

  18. Pharmacological targeting of GSK3β confers protection against podocytopathy and proteinuria by desensitizing mitochondrial permeability transition

    Science.gov (United States)

    Wang, Zhen; Bao, Hui; Ge, Yan; Zhuang, Shougang; Peng, Ai; Gong, Rujun

    2015-01-01

    Background and Purpose Mitochondrial dysfunction, triggered by mitochondria permeability transition (MPT), has been centrally implicated in the pathogenesis of podocytopathy and involves a multitude of cell signalling mechanisms, among which, glycogen synthase kinase (GSK) 3β has emerged as the integration point and plays a crucial role. This study aimed to examine the role of GSK3β in podocyte MPT and mitochondrial dysfunction. Experimental Approach The regulatory effect of GSK3β on MPT was examined in differentiated podocytes in culture and in a murine model of adriamycin-induced podocytopathy using 4-benzyl-2-methyl-1,2,4-thiadiazolidine-3,5-dione (TDZD-8), a highly selective small-molecule inhibitor of GSK3β. Key Results TDZD-8 therapy prominently ameliorated the proteinuria and glomerular sclerosis in mice with adriamycin nephropathy; this was associated with a correction of GSK3β overactivity in the glomerulus and attenuation of podocyte injuries, including foot process effacement and podocyte death. Consistently, in adriamycin-injured podocytes, TDZD-8 treatment counteracted GSK3β overactivity, improved cell viability and prevented death, concomitant with diminished oxidative stress, improved mitochondrial dysfunction and desensitized MPT. Mechanistically, a discrete pool of GSK3β was found in podocyte mitochondria, which interacted with and phosphorylated clyclophilin F, a key structural component of the MPT pore. TDZD-8 treatment prevented the GSK3β-controlled phosphorylation and activation of cyclophilin F, desensitized MPT and alleviated the damage to mitochondria in podocytes induced by adriamycin in vivo and in vitro. Conclusions and Implications Our findings suggest that pharmacological targeting of GSK3β could represent a promising and feasible therapeutic strategy for protecting podocytes against mitochondrial dysfunction induced by oxidative injuries. PMID:25262943

  19. Flow cytometric applications of tumor biology: prospects and pitfalls. [Applications in study of spontaneous dog tumors and in drug and radiation effects on cultured V79 cells

    Energy Technology Data Exchange (ETDEWEB)

    Raju, M.R.; Johnson, T.S.; Tokita, N.; Gillette, E.L.

    1979-01-01

    A brief review of cytometry instrumentation and its potential applications in tumor biology is presented using our recent data. Age-distribution measurements of cells from spontaneous dog tumors and cultured cells after exposure to x rays, alpha particles, or adriamycin are shown. The data show that DNA fluorescence measurements have application in the study of cell kinetics after either radiation or drug treatment. Extensive and careful experimentation is needed to utilize the sophisticated developments in flow cytometry instrumentation.

  20. Vitamin D attenuates proteinuria by inhibition of heparanase expression in the podocyte.

    Science.gov (United States)

    Garsen, Marjolein; Sonneveld, Ramon; Rops, Angelique L W M M; Huntink, Suzanne; van Kuppevelt, Toin H; Rabelink, Ton J; Hoenderop, Joost G J; Berden, Jo H M; Nijenhuis, Tom; van der Vlag, Johan

    2015-12-01

    The glomerular filtration barrier consists of podocytes, the glomerular basement membrane, and endothelial cells covered with a glycocalyx. Heparan sulphate (HS) in the glomerular filtration barrier is reduced in patients with proteinuria, which is associated with increased expression of the HS-degrading enzyme heparanase. Previously, we showed that heparanase is essential for the development of proteinuria in experimental diabetic nephropathy. Vitamin D supplementation reduces podocyte loss and proteinuria in vitro and in vivo. Therefore, we hypothesize that vitamin D reduces proteinuria by reducing glomerular heparanase. Adriamycin-exposed rats developed proteinuria and showed increased heparanase expression, which was reduced by 1,25-dihydroxyvitamin D3 (1,25-D3) treatment. In vitro, adriamycin increased heparanase mRNA in the podocyte, which could be corrected by 1,25-D3 treatment. In addition, 1,25-D3 treatment reduced transendothelial albumin passage after adriamycin stimulation. In line with these results, we showed direct binding of the vitamin D receptor to the heparanase promoter, and 1,25-D3 dose-dependently reduced heparanase promoter activity. Finally, 1,25-D3-deficient 25-hydroxy-1α-hydroxylase knockout mice developed proteinuria and showed increased heparanase, which was normalized by 1,25-D3 treatment. Our data suggest that the protective effect of vitamin D on the development of proteinuria is mediated by inhibiting heparanase expression in the podocyte. Copyright © 2015 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.

  1. Pharmacological effects on oscillatory afterpotentials in partially depolarized ventricular myocardium.

    Science.gov (United States)

    Albitz, R; Nilius, B

    1988-01-01

    Oscillatory afterpotentials induced by toxic concentrations of ouabain were studied in isolated papillary muscles from the right ventricular myocardium of guinea pigs. In partially depolarized muscles (22 mM extracellular K+) oscillatory afterpotentials (OAP) that follow action potentials can be described as nearly harmonic, periodical damped oscillation using a five parameter model. We measured the time course of the appearance and disappearance of ouabain-induced OAP under control conditions and modified by different pharmacological tools. Changes were quantified by the parameters of the model used. Adriamycin (50 microM) significantly delayed the time to the first OAP after administration of ouabain but also shortened the time necessary for recovery after a 30 min application of ouabain. Adriamycin also reduced the damping ratio of OAP but unlike caffeine (2 mM) it did not completely suppress OAP. The reduction of the extracellular Na+ concentration from 126 to 63 mM strikingly depressed OAP both in damping ratio and amplitude. Dexamethasone (2 microM) transiently depressed already developed OAP. The effects of adriamycin as well as Na+ reduction point to a contribution of a Na/Ca exchange in the generation of OAP. The effect of dexamethasone may refer to an involvement of eicosanoides in the generation of arrhythmogenic OAP.

  2. High stathmin expression is a marker for poor clinical outcome in endometrial cancer: An NRG oncology group/gynecologic oncology group study.

    Science.gov (United States)

    Reyes, Henry D; Miecznikowski, Jeffrey; Gonzalez-Bosquet, Jesus; Devor, Eric J; Zhang, Yuping; Thiel, Kristina W; Samuelson, Megan I; McDonald, Megan; Stephan, Jean-Marie; Hanjani, Parviz; Guntupalli, Saketh; Tewari, Krishnansu S; Backes, Floor; Ramirez, Nilsa; Fleming, Gini F; Filiaci, Virginia; Birrer, Michael J; Leslie, Kimberly K

    2017-08-01

    Gynecologic Oncology Group (GOG) 177 demonstrated that addition of paclitaxel to a backbone of adriamycin/cisplatin improves overall survival (OS) and progression-free survival (PFS) for patients with advanced or recurrent endometrial cancer. Using patient specimens from GOG-177, our objective was to identify potential mechanisms underlying the improved clinical response to taxanes. Stathmin (STMN1) is a recognized poor prognostic marker in endometrial cancer that functions as a microtubule depolymerizing protein, allowing cells to transit rapidly through mitosis. Therefore, we hypothesized that one possible mechanism underlying the beneficial effects of paclitaxel could be to counter the impact of stathmin. We analyzed the expression of stathmin by immunohistochemistry (IHC) in 69 specimens from patients enrolled on GOG-177. We also determined the correlation between stathmin mRNA expression and clinical outcomes in The Cancer Genome Atlas (TCGA) dataset for endometrial cancer. We first established that stathmin expression was significantly associated with shorter PFS and OS for all analyzed cases in both GOG-177 and TCGA. However, subgroup analysis from GOG-177 revealed that high stathmin correlated with poor PFS and OS particularly in patients who received adriamycin/cisplatin only. In contrast, there was no statistically significant association between stathmin expression and OS or PFS in patients treated with paclitaxel/adriamycin/cisplatin. Our findings demonstrate that high stathmin expression is a poor prognostic marker in endometrial cancer. Paclitaxel may help to negate the impact of stathmin overexpression when treating high risk endometrial cancer cases. Copyright © 2017 Elsevier Inc. All rights reserved.

  3. IIB osteosarcoma. Current management, local control, and survival statistics--São Paulo, Brazil.

    Science.gov (United States)

    Petrilli, S; Penna, V; Lopes, A; Figueiredo, M T; Gentil, F C

    1991-09-01

    Ninety-two patients with IIB osteosarcoma of the extremities were treated with intraarterial (IA) cisplatinum (CDDP) followed by surgery [amputation (61.6%) or resection with endoprosthesis (38.4%)]. Postoperative chemotherapy alternating adriamycin and CDDP was used. The total three-year survival was 62.1%, and the disease-free survival was 41.1%. The pathologic evaluation of the degree of tumor necrosis in response to the IA CDDP showed that in 53.2%, the necrosis was over 90%. The multivariate analysis of prognostic factors has shown that the highest survival was among females with tumors smaller than 15 cm. Patients with lesions equal to or larger than 15 cm were three times as likely to die of the disease. A second, more aggressive study is now underway, in which high dose methotrexate (HDMTX) is preoperatively combined with adriamycin and CDDP. Following operation, ifosfamide is added to the cases with a smaller degree of tumor necrosis, while the other group of patients will continue with HDMTX, in addition to CDDP and adriamycin (these last two drugs are used in both arms). Until now, complete remission has been achieved in 82% and 86%, respectively, with a follow-up examination varying from four to 26 months (average, 14 months). This is of extreme importance, because the majority of the authors' patients have tumors at initial evaluation larger than 10 cm in diameter.

  4. DNA of a circular minichromosome linearized by restriction enzymes or other reagents is resistant to further cleavage: an influence of chromatin topology on the accessibility of DNA.

    Science.gov (United States)

    Kumala, Sławomir; Hadj-Sahraoui, Yasmina; Rzeszowska-Wolny, Joanna; Hancock, Ronald

    2012-10-01

    The accessibility of DNA in chromatin is an essential factor in regulating its activities. We studied the accessibility of the DNA in a ∼170 kb circular minichromosome to DNA-cleaving reagents using pulsed-field gel electrophoresis and fibre-fluorescence in situ hybridization on combed DNA molecules. Only one of several potential sites in the minichromosome DNA was accessible to restriction enzymes in permeabilized cells, and in growing cells only a single site at an essentially random position was cut by poisoned topoisomerase II, neocarzinostatin and γ-radiation, which have multiple potential cleavage sites; further sites were then inaccessible in the linearized minichromosomes. Sequential exposure to combinations of these reagents also resulted in cleavage at only a single site. Minichromosome DNA containing single-strand breaks created by a nicking endonuclease to relax any unconstrained superhelicity was also cut at only a single position by a restriction enzyme. Further sites became accessible after ≥95% of histones H2A, H2B and H1, and most non-histone proteins were extracted. These observations suggest that a global rearrangement of the three-dimensional packing and interactions of nucleosomes occurs when a circular minichromosome is linearized and results in its DNA becoming inaccessible to probes.

  5. DNA damage response during mouse oocyte maturation.

    Science.gov (United States)

    Mayer, Alexandra; Baran, Vladimir; Sakakibara, Yogo; Brzakova, Adela; Ferencova, Ivana; Motlik, Jan; Kitajima, Tomoya S; Schultz, Richard M; Solc, Petr

    2016-01-01

    Because low levels of DNA double strand breaks (DSBs) appear not to activate the ATM-mediated prophase I checkpoint in full-grown oocytes, there may exist mechanisms to protect chromosome integrity during meiotic maturation. Using live imaging we demonstrate that low levels of DSBs induced by the radiomimetic drug Neocarzinostatin (NCS) increase the incidence of chromosome fragments and lagging chromosomes but do not lead to APC/C activation and anaphase onset delay. The number of DSBs, represented by γH2AX foci, significantly decreases between prophase I and metaphase II in both control and NCS-treated oocytes. Transient treatment with NCS increases >2-fold the number of DSBs in prophase I oocytes, but less than 30% of these oocytes enter anaphase with segregation errors. MRE11, but not ATM, is essential to detect DSBs in prophase I and is involved in H2AX phosphorylation during metaphase I. Inhibiting MRE11 by mirin during meiotic maturation results in anaphase bridges and also increases the number of γH2AX foci in metaphase II.  Compromised DNA integrity in mirin-treated oocytes indicates a role for MRE11 in chromosome integrity during meiotic maturation.

  6. New method for estimating clustering of DNA lesions induced by physical/chemical mutagens using fluorescence anisotropy.

    Science.gov (United States)

    Akamatsu, Ken; Shikazono, Naoya; Saito, Takeshi

    2017-11-01

    We have developed a new method for estimating the localization of DNA damage such as apurinic/apyrimidinic sites (APs) on DNA using fluorescence anisotropy. This method is aimed at characterizing clustered DNA damage produced by DNA-damaging agents such as ionizing radiation and genotoxic chemicals. A fluorescent probe with an aminooxy group (AlexaFluor488) was used to label APs. We prepared a pUC19 plasmid with APs by heating under acidic conditions as a model for damaged DNA, and subsequently labeled the APs. We found that the observed fluorescence anisotropy (r obs ) decreases as averaged AP density (λ AP : number of APs per base pair) increases due to homo-FRET, and that the APs were randomly distributed. We applied this method to three DNA-damaging agents, 60 Co γ-rays, methyl methanesulfonate (MMS), and neocarzinostatin (NCS). We found that r obs -λ AP relationships differed significantly between MMS and NCS. At low AP density (λ AP  < 0.001), the APs induced by MMS seemed to not be closely distributed, whereas those induced by NCS were remarkably clustered. In contrast, the AP clustering induced by 60 Co γ-rays was similar to, but potentially more likely to occur than, random distribution. This simple method can be used to estimate mutagenicity of ionizing radiation and genotoxic chemicals. Copyright © 2017 Elsevier Inc. All rights reserved.

  7. Effects of antineoplastic drugs on Lactobacillus casei and radioisotopic assays for serum folate

    Energy Technology Data Exchange (ETDEWEB)

    Carmel, R.

    1978-02-01

    Microbiologic assay, usually employing Lactobacillus casei, remains the standard assay for serum folate to date. Among its disadvantages have been falsely low results in patients receiving bacteriostatic agents such as antibiotics. This study examined whether commonly used antineoplastic drugs had similar effect. Methotrexate and 5-fluorouracil depressed microbiologic serum folate levels. No effect was found for adriamycin, bleomycin, BCNU, cyclophosphamide, cytosine arabinoside, vincristine, vinblastine, mechlorethamine, mithramycin, hydroxyurea, and hydrocortisone. None of the drugs affected radioassay except methotrexate, which produced falsely high folate results. Thus, it appears that L. casei assay for folate becomes unreliable in patients receiving 5-fluorouracil and radioisotopic assay becomes unreliable in those receiving methotrexate.

  8. Clinical impact of FDG-PET/CT in the planning of radiotherapy for early-stage Hodgkin lymphoma

    DEFF Research Database (Denmark)

    Hutchings, Martin; Loft, Annika; Hansen, Mads

    2007-01-01

    of 2-[18F]-fluoro-2-deoxy-d-glucose positron emission tomography/computerised tomogrpahy (FDG-PET/CT) in the planning of involved field radiotherapy (IFRT). PATIENTS AND METHODS: Thirty patients received staging FDG-PET/CT before therapy, and IFRT after a short course of ABVD (adriamycin, bleomycin......, vinblastine, dacarbazine) chemotherapy. IFRT planning was performed using only the CT data from the FDG-PET/CT scan. Later, the IFRT planning was performed anew using the FDG-PET/CT data as basis for contouring. RESULTS: In 20 out of 30 patients, the radiotherapy (RT) course was unaffected by the addition...

  9. [A case of primary leiomyosarcoma of the ureter].

    Science.gov (United States)

    Shirotake, Suguru; Sumitomo, Makoto; Asakuma, Jyunichi; Asano, Tomohiko; Aiko, Satoshi; Hayakawa, Masamichi

    2006-01-01

    A 60-year-old woman was admitted to our hospital with pain in the left flank. Retrograde pyelography, computed tomographic scan, and magnetic resonance imaging demonstrated left hydronephrosis due to a 7 cm retroperitoneal mass involving the left ureter. Left nephroureterectomy and partial resection of the mesentery revealed a primary ureteral leiomyosarcoma. Three months postoperatively, the patient received systemic chemotherapy (CYVADIC; cyclophosphamide, vincristine, adriamycin and DTIC) for a recurrent tumor. Two courses of chemotherapy reduced the tumor by nearly 60%. Then we performed surgery in an attempt to resect the residual disease. However, the tumor continued to progress and the patient died approximately one year after diagnosis.

  10. Primary Adrenal Lymphoma Infiltrating in to Pancreas: A Rare Cause of Adrenomegaly

    Directory of Open Access Journals (Sweden)

    Lovelesh Kumar Nigam

    2017-03-01

    Full Text Available Primary adrenal lymphoma is a rare entity and may be suspected in patients having bilateral adrenal masses, with/without lymphadenopathy, and with/without adrenal insufficiency. We report a rare case of a 45-year-old man who presented with pain in the abdomen, with no signs of adrenal insufficiency and bilateral adrenal masses on imaging. Light microscopy findings with immunohistochemistry and flow cytometry confirmed the diagnosis of diffuse large B-cell lymphoma. The patient was offered cyclophosphamide, adriamycin, vincristine, and prednisolone chemotherapy regimen and doing well till the last follow-up. [J Interdiscipl Histopathol 2017; 5(1.000: 25-28

  11. Acute Local Spontaneous and Profuse Gingival Hemorrhage during Neoadjuvant Treatment with Paclitaxel and Trastuzumab

    Directory of Open Access Journals (Sweden)

    Nima D. Sarmast

    2016-06-01

    Full Text Available This case report describes a 33-year-old female currently undergoing breast cancer treatment following the AC-T-T (doxorubicin hydrochloride (Adriamycin and cyclophosphamide followed by paclitaxel (Taxol and trastuzumab (Herceptin treatment regimen. Her chief complaint at the time of the emergency visit at the dental office was that she had an episode of profuse spontaneous bleeding located at the palatal gingiva in the maxilla between the left central and lateral incisor. To our knowledge, this is a novel finding related to the medications she is utilizing and should be further investigated.

  12. Neutropenia and Neutropenic Complications in ABVD Chemotherapy for Hodgkin Lymphoma

    Directory of Open Access Journals (Sweden)

    Bhanu Vakkalanka

    2011-01-01

    Full Text Available A combination of Adriamycin (a.k.a. Doxorubicin, Bleomycin, Vinblastine, and Dacarbazine (ABVD is the most commonly used chemotherapy regime for Hodgkin lymphoma. This highly effective treatment is associated with a significant risk of neutropenia. Various strategies are adopted to counter this commonly encountered problem, including dose modification, use of colony stimulating factors, and prophylactic or therapeutic use of antibiotics. Data to support these approaches is somewhat controversial, and in keeping with the paucity of definitive evidence, there is a wide disparity in the management of neutropenia in patients receiving ABVD chemotherapy. This paper summarizes the evidence for managing ABVD-related neutropenia during the treatment of Hodgkin lymphoma.

  13. Different effects of eubacterial and eukaryotic DNA topoisomerase II inhibitors on chloroplasts ofEuglena gracilis

    Science.gov (United States)

    Krajčovič, Juraj; Ebringer, Libor

    1990-03-01

    Inhibitors of eubacterial and eukaryotic DNA topoisomerases type II exhibited different effects on chloroplasts of the flagellateEuglena gracilis. Antibacterial agents (cinoxacin, nalidixic and oxolinic acids, ciprofloxacin, enoxacin, norfloxacin and ofloxacin) from the group of quinolones and coumarins (coumermycin A1, clorobiocin and novobiocin) — all inhibitors of prokaryotic DNA topoisomerase II — were very potent eliminators of chloroplasts fromE. gracilis. In contrast, antitumor drugs (adriamycin, etoposide, teniposide and mitoxantrone) — antagonists of the eukaryotic counterpart — did not affect these semiautonomous photosynthetic organelles. These findings point out again the close evolutionary relationships between eubacteria and chloroplasts and are in agreement with the hypothesis of an endosymbiotic origin of chloroplasts.

  14. Human Truncated Tau Induces Mature Neurofibrillary Pathology in a Mouse Model of Human Tauopathy.

    Science.gov (United States)

    Zimova, Ivana; Brezovakova, Veronika; Hromadka, Tomas; Weisova, Petronela; Cubinkova, Veronika; Valachova, Bernadeta; Filipcik, Peter; Jadhav, Santosh; Smolek, Tomas; Novak, Michal; Zilka, Norbert

    2016-09-06

    Alzheimer's disease (AD) represents the most common neurodegenerative disorder. Several animal models have been developed in order to test pathophysiological mechanisms of the disease and to predict effects of pharmacological interventions. Here we examine the molecular and behavioral features of R3m/4 transgenic mice expressing human non-mutated truncated tau protein (3R tau, aa151-391) that were previously used for efficacy testing of passive tau vaccine. The mouse model reliably recapitulated crucial histopathological features of human AD, such as pre-tangles, neurofibrillary tangles, and neuropil threads. The pathology was predominantly located in the brain stem. Transgenic mice developed mature sarkosyl insoluble tau complexes consisting of mouse endogenous and human truncated and hyperphosphorylated forms of tau protein. The histopathological and biochemical features were accompanied by significant sensorimotor impairment and reduced lifespan. The sensorimotor impairment was monitored by a highly sensitive, fully-automated tool that allowed us to assess early deficit in gait and locomotion. We suggest that the novel transgenic mouse model can serve as a valuable tool for analysis of the therapeutic efficacy of tau vaccines for AD therapy.

  15. Recombinant PorA, the major outer membrane protein of Campylobacter jejuni, provides heterologous protection in an adult mouse intestinal colonization model.

    Science.gov (United States)

    Islam, Anjum; Raghupathy, Raj; Albert, M John

    2010-11-01

    Immunity against Campylobacter jejuni, a major food-borne pathogen causing diarrhea, is largely serotype specific. The major outer membrane protein (MOMP) of C. jejuni, PorA, is a common antigen with the potential to provide broad protection. Adult BALB/c mice were orally immunized with a recombinant glutathione S-transferase (GST) fused to PorA prepared from Campylobacter jejuni C31 (O:6,7) (GST-PorA) combined with a modified heat-labile enterotoxin of Escherichia coli as an adjuvant and later orally challenged with C31 strain or three heterologous strains: 48 (O:19), 75 (O:3), and 111 (O:1,44). Protection from colonization with the challenge organism was studied by fecal screening daily for 9 days. Serum and intestinal lavage fluid antibodies against the vaccine and Sarkosyl-purified MOMP from C31 were measured by using an enzyme-linked immunosorbent assay. The vaccine produced robust antibody responses against both antigens in serum and secretion. Since strain C31 was a poor colonizer, homologous protection could not be studied. The protective efficacies of heterologous strains were 43% (for strain 48, P < 0.001), 29% (for strain 75, P < 0.005), and 42% (for strain 111, P < 0.001) for the 9-day period compared to control mice given phosphate-buffered saline. Thus, PorA provided appreciable protection against colonization with heterologous serotypes.

  16. High-quality total RNA isolation from melon (Cucumis melo L. fruits rich in polysaccharides

    Directory of Open Access Journals (Sweden)

    Gabrielle Silveira de Campos

    2017-08-01

    Full Text Available Melon, a member of the family Cucurbitaceae, is the fourth most important fruit in the world market and, on a volume basis, is Brazil’s main fresh fruit export. Many molecular techniques used to understand the maturation of these fruits require high concentrations of highly purified RNA. However, melons are rich in polyphenolic compounds and polysaccharides, which interfere with RNA extraction. This study aimed to determine the most appropriate method for total RNA extraction from melon fruits. Six extraction buffers were tested: T1 guanidine thiocyanate/phenol/chloroform; T2 sodium azide/?-mercaptoethanol; T3 phenol/guanidine thiocyanate; T4 CTAB/PVP/?-mercaptoethanol; T5 SDS/sodium perchlorate/PVP/?-mercaptoethanol, and T6 sarkosyl/PVP/guanidine thiocyanate, using the AxyPrepTM Multisource Total RNA Miniprep Kit. The best method for extracting RNA from both mature and green fruit was based on the SDS/PVP/?-mercaptoethanol buffer, because it rapidly generated a high quality and quantity of material. In general, higher amounts of RNA were obtained from green than mature fruits, probably due to the lower concentration of polysaccharides and water. The purified material can be used as a template in molecular techniques, such as microarrays, RT-PCR, and in the construction of cDNA and RNA-seq data.

  17. Outer Membrane Proteome Analysis of Indian Strain of Pasteurella multocida Serotype B:2 by MALDI-TOF/MS Analysis

    Directory of Open Access Journals (Sweden)

    A. Prasannavadhana

    2014-01-01

    Full Text Available Identification of outer membrane proteins (OMPs is important to understand the bacteria structure and function, host-pathogen interaction, development of novel vaccine candidates, and diagnostic antigens. But till now the key antigens of P. multocida B:2 isolate causing haemorrhagic septicaemia (HS in animals are not clearly defined. In this study, P52 strain of P. multocida serotype B:2 was grown in vitro under iron-rich and iron-limited condition. The OMPs were extracted by sarkosyl method followed by SDS-PAGE and the proteins were identified by MALDI-TOF/MS analysis. In total, 22 proteins were identified, of which 7 were observed exclusively under iron-limited condition. Most of the high molecular weight proteins (TbpA, HgbA, HgbB, HasR, IroA, and HemR identified in this study were involved in iron acquisition. Some hypothetical proteins (HP-KCU-10206, HP and AAUPMB 08244, HP AAUPMB 21592, HP AAUPMB 19766, AAUPMB 11295 were observed for the first time in this study which could be unique to serotype B:2. Further functional in vivo study of the proteins identified are required to explore the utility of these proteins in developing diagnostics and vaccine against HS.

  18. Biodiversity of bacteriophages: morphological and biological properties of a large group of phages isolated from urban sewage.

    Science.gov (United States)

    Jurczak-Kurek, Agata; Gąsior, Tomasz; Nejman-Faleńczyk, Bożena; Bloch, Sylwia; Dydecka, Aleksandra; Topka, Gracja; Necel, Agnieszka; Jakubowska-Deredas, Magdalena; Narajczyk, Magdalena; Richert, Malwina; Mieszkowska, Agata; Wróbel, Borys; Węgrzyn, Grzegorz; Węgrzyn, Alicja

    2016-10-04

    A large scale analysis presented in this article focuses on biological and physiological variety of bacteriophages. A collection of 83 bacteriophages, isolated from urban sewage and able to propagate in cells of different bacterial hosts, has been obtained (60 infecting Escherichia coli, 10 infecting Pseudomonas aeruginosa, 4 infecting Salmonella enterica, 3 infecting Staphylococcus sciuri, and 6 infecting Enterococcus faecalis). High biological diversity of the collection is indicated by its characteristics, both morphological (electron microscopic analyses) and biological (host range, plaque size and morphology, growth at various temperatures, thermal inactivation, sensitivity to low and high pH, sensitivity to osmotic stress, survivability upon treatment with organic solvents and detergents), and further supported by hierarchical cluster analysis. By the end of the research no larger collection of phages from a single environmental source investigated by these means had been found. The finding was confirmed by whole genome analysis of 7 selected bacteriophages. Moreover, particular bacteriophages revealed unusual biological features, like the ability to form plaques at low temperature (4 °C), resist high temperature (62 °C or 95 °C) or survive in the presence of an organic solvents (ethanol, acetone, DMSO, chloroform) or detergent (SDS, CTAB, sarkosyl) making them potentially interesting in the context of biotechnological applications.

  19. DNA extractions from deep subseafloor sediments: novel cryogenic-mill-based procedure and comparison to existing protocols.

    Science.gov (United States)

    Alain, Karine; Callac, Nolwenn; Ciobanu, Maria-Cristina; Reynaud, Yann; Duthoit, Frédérique; Jebbar, Mohamed

    2011-12-01

    Extracting DNA from deep subsurface sediments is challenging given the complexity of sediments types, low biomasses, resting structures (spores, cysts) frequently encountered in deep sediments, and the potential presence of enzymatic inhibitors. Promising results for cell lysis efficiency were recently obtained by use of a cryogenic mill (Lipp et al., 2008). These findings encouraged us to devise a DNA extraction protocol using this tool. Thirteen procedures involving a combination of grinding in liquid nitrogen (for various durations and beating rates) with different chemical solutions (phenol, chloroform, SDS, sarkosyl, proteinase, GTC), or with use of DNA recovery kits (MagExtractor®) were compared. Effective DNA extraction was evaluated in terms of cell lysis efficiency, DNA extraction efficiency, DNA yield and determination of prokaryotic diversity. Results were compared to those obtained by standard protocols: the FastDNA®SPIN kit for soil and the Zhou protocol. For most sediment types grinding in a cryogenic mill at a low beating rate in combination with direct phenol-chloroform extraction resulted in much higher DNA yields than those obtained using classical procedures. In general (except for clay-rich sediments), this procedure provided high-quality crude extracts for direct downstream nested-PCR, from cell numbers as low as 1.1×10(6) cells/cm(3). This procedure is simple, rapid, low-cost, and could be used with minor modifications for large-scale DNA extractions for a variety of experimental goals. Copyright © 2011 Elsevier B.V. All rights reserved.

  20. Proteomic profiling of phosphoproteins and glycoproteins responsive to wild-type alpha-synuclein accumulation and aggregation

    Science.gov (United States)

    Kulathingal, Jayanarayan; Ko, Li-wen; Cusack, Bernadette; Yen, Shu-Hui

    2009-01-01

    A tetracycline inducible transfectant cell line (3D5) capable of producing soluble and sarkosyl-insoluble assemblies of wild-type human alpha-synuclein (α-Syn) upon differentiation with retinoic acid was used to study the impact of α-Syn accumulation on protein phosphorylation and glycosylation. Soluble proteins from 3D5 cells, with or without the induced α-Syn expression were analyzed by two-dimensional gel electrophoresis and staining of gels with dyes that bind to proteins (Sypro ruby), phosphoproteins (Pro-Q diamond) and glycoproteins (Pro-Q emerald). Phosphoproteins were further confirmed by binding to immobilized metal ion affinity column. α-Syn accumulation caused differential phosphorylation and glycosylation of 16 and 12, proteins, respectively, whose identity was revealed by mass spectrometry. These proteins, including HSP90, have diverse biological functions including protein folding, signal transduction, protein degradation and cytoskeletal regulation. Importantly, cells accumulating α-Syn assemblies with different abilities to bind thioflavin S displayed different changes in phosphorylation and glycosylation. Consistent with the cell-based studies, we demonstrated a reduced level of phosphorylated HSP90 α/β in the substantia nigra of subjects with Parkinson’s disease as compared to normal controls. Together, the results indicate that α-Syn accumulation causes complex cellular responses, which if persist may compromise cell viability. PMID:19027885

  1. Aggregates Assembled from Overexpression of Wild Type α-Synuclein Are Not Toxic to Human Neuronal Cells

    Science.gov (United States)

    Ko, Li-wen; Ko, Hwai-hwa C.; Lin, Wen-Lang; Kulathingal, Jayanranyan G.; Yen, Shu-Hui C.

    2009-01-01

    Filamentous α-synuclein (α-syn) aggregates form Lewy bodies (LBs), the neuropathologic hallmarks of Parkinson disease and related α-synucleinopathies. To model Lewy body-associated neurodegeneration, we generated transfectant human neuronal type cells (clone 3D5) in which expression of human wild-type α-syn is regulated by the tetracycline off (TetOff)-inducible mechanism. Retinoic acid-elicited differentiation promoted assembly of α-syn aggregates after TetOff induction in 3D5 cells. The aggregates accumulated 14 days after TetOff induction were primarily soluble and showed augmented thioflavin affinity with concomitant phosphorylation and nitration of α-syn. Extension of the induction led to the formation of sarkosyl-insoluble aggregates that appeared concurrently with thioflavin-positive inclusions. Immunoelectron microscopy revealed that the inclusions consist of dense bundles of 8- to 12-nm α-syn fibrils that congregate in the perikarya and resemble LBs. Most importantly, accumulation of soluble and insoluble aggregates after TetOff induction for 14 and 28 days was reversible and did not compromise the viability of the cells or their subsequent survival. Thus, this chemically defined culture paradigm provides a useful means to elucidate how oxidative injuries and other insults that are associated with aging promote α-syn to self-assemble or interact with other molecules leading to neuronal degeneration in α-synucleinopathies. PMID:18957893

  2. Methylene blue does not reverse existing neurofibrillary tangle pathology in the rTg4510 mouse model of tauopathy.

    Science.gov (United States)

    Spires-Jones, Tara L; Friedman, Taylor; Pitstick, Rose; Polydoro, Manuela; Roe, Allyson; Carlson, George A; Hyman, Bradley T

    2014-03-06

    Alzheimer's disease is characterized pathologically by aggregation of amyloid beta into senile plaques and aggregation of pathologically modified tau into neurofibrillary tangles. While changes in amyloid processing are strongly implicated in disease initiation, the recent failure of amyloid-based therapies has highlighted the importance of tau as a therapeutic target. "Tangle busting" compounds including methylene blue and analogous molecules are currently being evaluated as therapeutics in Alzheimer's disease. Previous studies indicated that methylene blue can reverse tau aggregation in vitro after 10 min, and subsequent studies suggested that high levels of drug reduce tau protein levels (assessed biochemically) in vivo. Here, we tested whether methylene blue could remove established neurofibrillary tangles in the rTg4510 model of tauopathy, which develops robust tangle pathology. We find that 6 weeks of methylene blue dosing in the water from 16 months to 17.5 months of age decreases soluble tau but does not remove sarkosyl insoluble tau, or histologically defined PHF1 or Gallyas positive tangle pathology. These data indicate that methylene blue treatment will likely not rapidly reverse existing tangle pathology. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

  3. Generation and characterization of new monoclonal antibodies targeting the PHF1 and AT8 epitopes on human tau.

    Science.gov (United States)

    Strang, Kevin H; Goodwin, Marshall S; Riffe, Cara; Moore, Brenda D; Chakrabarty, Paramita; Levites, Yona; Golde, Todd E; Giasson, Benoit I

    2017-07-31

    Tauopathies are a group of neurodegenerative disorders, including Alzheimer's disease, defined by the presence of brain pathological inclusions comprised of abnormally aggregated and highly phosphorylated tau protein. The abundance of brain tau aggregates correlates with disease severity and select phospho-tau epitopes increase at early stages of disease. We generated and characterized a series of novel monoclonal antibodies directed to tau phosphorylated at several of these phospho-epitopes, including Ser396/Ser404, Ser404 and Thr205. We also generated phosphorylation independent antibodies against amino acid residues 193-211. We show that most of these antibodies are highly specific for tau and strongly recognize pathological inclusions in human brains and in a transgenic mouse model of tauopathy. They also reveal epitope-specific differences in the biochemical properties of Alzheimer's disease sarkosyl-insoluble tau. These new reagents will be useful for investigating the progression of tau pathology and further as tools to target the cellular transmission of tau pathology.

  4. Paired Helical Filaments from Alzheimer Disease Brain Induce Intracellular Accumulation of Tau Protein in Aggresomes*

    Science.gov (United States)

    Santa-Maria, Ismael; Varghese, Merina; Ksiȩżak-Reding, Hanna; Dzhun, Anastasiya; Wang, Jun; Pasinetti, Giulio M.

    2012-01-01

    Abnormal folding of tau protein leads to the generation of paired helical filaments (PHFs) and neurofibrillary tangles, a key neuropathological feature in Alzheimer disease and tauopathies. A specific anatomical pattern of pathological changes developing in the brain suggests that once tau pathology is initiated it propagates between neighboring neuronal cells, possibly spreading along the axonal network. We studied whether PHFs released from degenerating neurons could be taken up by surrounding cells and promote spreading of tau pathology. Neuronal and non-neuronal cells overexpressing green fluorescent protein-tagged tau (GFP-Tau) were treated with isolated fractions of human Alzheimer disease-derived PHFs for 24 h. We found that cells internalized PHFs through an endocytic mechanism and developed intracellular GFP-Tau aggregates with attributes of aggresomes. This was particularly evident by the perinuclear localization of aggregates and redistribution of the vimentin intermediate filament network and retrograde motor protein dynein. Furthermore, the content of Sarkosyl-insoluble tau, a measure of abnormal tau aggregation, increased 3-fold in PHF-treated cells. An exosome-related mechanism did not appear to be involved in the release of GFP-Tau from untreated cells. The evidence that cells can internalize PHFs, leading to formation of aggresome-like bodies, opens new therapeutic avenues to prevent propagation and spreading of tau pathology. PMID:22496370

  5. Prion-like spreading of pathological α-synuclein in brain

    Science.gov (United States)

    Masuda-Suzukake, Masami; Nonaka, Takashi; Hosokawa, Masato; Oikawa, Takayuki; Arai, Tetsuaki; Akiyama, Haruhiko; Mann, David M. A.

    2013-01-01

    α-Synuclein is the major component of filamentous inclusions that constitute the defining characteristic of neurodegenerative α-synucleinopathies. However, the molecular mechanisms underlying α-synuclein accumulation and spread are unclear. Here we show that intracerebral injections of sarkosyl-insoluble α-synuclein from brains of patients with dementia with Lewy bodies induced hyperphosphorylated α-synuclein pathology in wild-type mice. Furthermore, injection of fibrils of recombinant human and mouse α-synuclein efficiently induced similar α-synuclein pathologies in wild-type mice. C57BL/6J mice injected with α-synuclein fibrils developed abundant Lewy body/Lewy neurite-like pathology, whereas mice injected with soluble α-synuclein did not. Immunoblot analysis demonstrated that endogenous mouse α-synuclein started to accumulate 3 months after inoculation, while injected human α-synuclein fibrils disappeared in about a week. These results indicate that α-synuclein fibrils have prion-like properties and inoculation into wild-type brain induces α-synuclein pathology in vivo. This is a new mouse model of sporadic α-synucleinopathy and should be useful for elucidating progression mechanisms and evaluating disease-modifying therapy. PMID:23466394

  6. Formation and spreading of TDP-43 aggregates in cultured neuronal and glial cells demonstrated by time-lapse imaging.

    Directory of Open Access Journals (Sweden)

    Tomohiro Ishii

    Full Text Available TAR DNA-binding protein 43 (TDP-43 is a main constituent of cytoplasmic aggregates in neuronal and glial cells in cases of amyotrophic lateral sclerosis and frontotemporal lobar degeneration. We have previously demonstrated that adenovirus-transduced artificial TDP-43 cytoplasmic aggregates formation is enhanced by proteasome inhibition in vitro and in vivo. However, the relationship between cytoplasmic aggregate formation and cell death remains unclear. In the present study, rat neural stem cell lines stably transfected with EGFP- or Sirius-expression vectors under the control of tubulin beta III, glial fibrillary acidic protein, or 2',3'-cyclic nucleotide 3'-phosphodiesterase promoter were differentiated into neurons, astrocytes, and oligodendrocytes, respectively, in the presence of retinoic acid. The differentiated cells were then transduced with adenoviruses expressing DsRed-tagged human wild type and C-terminal fragment TDP-43 under the condition of proteasome inhibition. Time-lapse imaging analyses revealed growing cytoplasmic aggregates in the transduced neuronal and glial cells, followed by collapse of the cell. The aggregates remained insoluble in culture media, consisted of sarkosyl-insoluble granular materials, and contained phosphorylated TDP-43. Moreover, the released aggregates were incorporated into neighboring neuronal cells, suggesting cell-to-cell spreading. The present study provides a novel tool for analyzing the detailed molecular mechanisms of TDP-43 proteinopathy in vitro.

  7. Comparative study to develop a single method for retrieving wide class of recombinant proteins from classical inclusion bodies.

    Science.gov (United States)

    Padhiar, Arshad Ahmed; Chanda, Warren; Joseph, Thomson Patrick; Guo, Xuefang; Liu, Min; Sha, Li; Batool, Samana; Gao, Yifan; Zhang, Wei; Huang, Min; Zhong, Mintao

    2018-01-31

    The formation of inclusion bodies (IBs) is considered as an Achilles heel of heterologous protein expression in bacterial hosts. Wide array of techniques has been developed to recover biochemically challenging proteins from IBs. However, acquiring the active state even from the same protein family was found to be an independent of single established method. Here, we present a new strategy for the recovery of wide sub-classes of recombinant protein from harsh IBs. We found that numerous methods and their combinations for reducing IB formation and producing soluble proteins were not effective, if the inclusion bodies were harsh in nature. On the other hand, different practices with mild solubilization buffers were able to solubilize IBs completely, yet the recovery of active protein requires large screening of refolding buffers. With the integration of previously reported mild solubilization techniques, we proposed an improved method, which comprised low sarkosyl concentration, ranging from 0.05 to 0.1% coupled with slow freezing (- 1 °C/min) and fast thaw (room temperature), resulting in greater solubility and the integrity of solubilized protein. Dilution method was employed with single buffer to restore activity for every sub-class of recombinant protein. Results showed that the recovered protein's activity was significantly higher compared with traditional solubilization/refolding approach. Solubilization of IBs by the described method was proved milder in nature, which restored native-like conformation of proteins within IBs.

  8. Protein phosphatase 5 is necessary for ATR-mediated DNA repair

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Yoonsung [Department of Pharmacology, DNA Repair Research Center, Chosun University School of Medicine, 375 Seosuk-Dong, Gwangju 501-759 (Korea, Republic of); Cheong, Hyang-Min [Department of Life Science, College of Natural Science, Chung-Ang University, 221 Heuksuk-Dong, Dongjak-Ku, Seoul 156-756 (Korea, Republic of); Lee, Jung-Hee [Department of Pharmacology, DNA Repair Research Center, Chosun University School of Medicine, 375 Seosuk-Dong, Gwangju 501-759 (Korea, Republic of); Song, Peter I. [Department of Dermatology, University of Arkansas for Medical Science, 4301 West Markham, Slot 576, Little Rock, AR 72205 (Korea, Republic of); Lee, Kwang-Ho [Department of Life Science, College of Natural Science, Chung-Ang University, 221 Heuksuk-Dong, Dongjak-Ku, Seoul 156-756 (Korea, Republic of); Kim, Sang-Yong [Division of Endocrinology, Department of Internal Medicine, Chosun University School of Medicine, 375 Seosuk-Dong, Gwangju 501-759 (Korea, Republic of); Jun, Jae Yeoul [Department of Physiology, Chosun University School of Medicine, 375 Seosuk-Dong, Gwangju 501-759 (Korea, Republic of); You, Ho Jin, E-mail: hjyou@chosun.ac.kr [Department of Pharmacology, DNA Repair Research Center, Chosun University School of Medicine, 375 Seosuk-Dong, Gwangju 501-759 (Korea, Republic of)

    2011-01-07

    Research highlights: {yields} Serine/threonine protein phosphatase 5 (PP5) has been shown to participate in ataxia telangiectasia-mutated (ATM)- and ATR (ATM- and Rad3-related)-mediated checkpoint pathways, which plays an important role in the DNA damage response and maintenance of genomic stability. {yields} However, it is not clear exactly how PP5 participates in this process. {yields} Our results indicate that PP5 is more closely related with ATR-mediated pathway than ATM-mediated pathway in DNA damage repair. -- Abstract: Several recent studies have shown that protein phosphatase 5 (PP5) participates in cell cycle arrest after DNA damage, but its roles in DNA repair have not yet been fully characterized. We investigated the roles of PP5 in the repair of ultraviolet (UV)- and neocarzinostatin (NCS)-induced DNA damage. The results of comet assays revealed different repair patterns in UV- and NCS-exposed U2OS-PS cells. PP5 is only essential for Rad3-related (ATR)-mediated DNA repair. Furthermore, the phosphorylation of 53BP1 and BRCA1, important mediators of DNA damage repair, and substrates of ATR and ATM decreased in U2OS-PS cells exposed to UV radiation. In contrast, the cell cycle arrest proteins p53, CHK1, and CHK2 were normally phosphorylated in U2OS and U2OS-PS cells exposed to UV radiation or treated with NCS. In view of these results, we suggest that PP5 plays a crucial role in ATR-mediated repair of UV-induced DNA damage.

  9. A differential autophagy-dependent response to DNA double-strand breaks in bone marrow mesenchymal stem cells from sporadic ALS patients

    Directory of Open Access Journals (Sweden)

    Shane Wald-Altman

    2017-05-01

    Full Text Available Amyotrophic lateral sclerosis (ALS is an incurable motor neurodegenerative disease caused by a diversity of genetic and environmental factors that leads to neuromuscular degeneration and has pathophysiological implications in non-neural systems. Our previous work showed abnormal levels of mRNA expression for biomarker genes in non-neuronal cell samples from ALS patients. The same genes proved to be differentially expressed in the brain, spinal cord and muscle of the SOD1G93A ALS mouse model. These observations support the idea that there is a pathophysiological relevance for the ALS biomarkers discovered in human mesenchymal stem cells (hMSCs isolated from bone marrow samples of ALS patients (ALS-hMSCs. Here, we demonstrate that ALS-hMSCs are also a useful patient-based model to study intrinsic cell molecular mechanisms of the disease. We investigated the ALS-hMSC response to oxidative DNA damage exerted by neocarzinostatin (NCS-induced DNA double-strand breaks (DSBs. We found that the ALS-hMSCs responded to this stress differently from cells taken from healthy controls (HC-hMSCs. Interestingly, we found that ALS-hMSC death in response to induction of DSBs was dependent on autophagy, which was initialized by an increase of phosphorylated (pAMPK, and blocked by the class III phosphoinositide 3-kinase (PI3K and autophagy inhibitor 3-methyladenine (3MeA. ALS-hMSC death in response to DSBs was not apoptotic as it was caspase independent. This unique ALS-hMSC-specific response to DNA damage emphasizes the possibility that an intrinsic abnormal regulatory mechanism controlling autophagy initiation exists in ALS-patient-derived hMSCs. This mechanism may also be relevant to the most-affected tissues in ALS. Hence, our approach might open avenues for new personalized therapies for ALS.

  10. Chromatin relaxation-mediated induction of p19INK4d increases the ability of cells to repair damaged DNA.

    Directory of Open Access Journals (Sweden)

    María F Ogara

    Full Text Available The maintenance of genomic integrity is of main importance to the survival and health of organisms which are continuously exposed to genotoxic stress. Cells respond to DNA damage by activating survival pathways consisting of cell cycle checkpoints and repair mechanisms. However, the signal that triggers the DNA damage response is not necessarily a direct detection of the primary DNA lesion. In fact, chromatin defects may serve as initiating signals to activate those mechanisms. If the modulation of chromatin structure could initiate a checkpoint response in a direct manner, this supposes the existence of specific chromatin sensors. p19INK4d, a member of the INK4 cell cycle inhibitors, plays a crucial role in regulating genomic stability and cell viability by enhancing DNA repair. Its expression is induced in cells injured by one of several genotoxic treatments like cis-platin, UV light or neocarzinostatin. Nevertheless, when exogenous DNA damaged molecules are introduced into the cell, this induction is not observed. Here, we show that p19INK4d is enhanced after chromatin relaxation even in the absence of DNA damage. This induction was shown to depend upon ATM/ATR, Chk1/Chk2 and E2F activity, as is the case of p19INK4d induction by endogenous DNA damage. Interestingly, p19INK4d improves DNA repair when the genotoxic damage is caused in a relaxed-chromatin context. These results suggest that changes in chromatin structure, and not DNA damage itself, is the actual trigger of p19INK4d induction. We propose that, in addition to its role as a cell cycle inhibitor, p19INK4d could participate in a signaling network directed to detecting and eventually responding to chromatin anomalies.

  11. Processing of 3'-Phosphoglycolate-Terminated DNA Double-StrandBreaks by Artemis Nuclease

    Energy Technology Data Exchange (ETDEWEB)

    Povrik, Lawrence F.; Zhou, Tong; Zhou, Ruizhe; Cowan, Morton J.; Yannone, Steven M.

    2005-10-01

    The Artemis nuclease is required for V(D)J recombination and for repair of an as yet undefined subset of radiation-induced DNA double-strand breaks. To assess the possibility that Artemis functions on oxidatively modified double-strand break termini, its activity toward model DNA substrates, bearing either 3{prime}-hydroxyl or 3{prime}-phosphoglycolate moieties, was examined. A 3{prime}-phosphoglycolate had little effect on Artemis-mediated trimming of long 3{prime} overhangs (>9 nucleotides), which were efficiently trimmed to 4-5 nucleotides. However, 3{prime}-phosphoglycolates on overhangs of 4-5 bases promoted selective Artemis-mediated trimming of a single 3{prime}-terminal nucleotide, while at least 2 nucleotides were trimmed from identical hydroxyl-terminated substrates. Artemis also efficiently removed a single nucleotide from a phosphoglycolate-terminated 3-base 3{prime} overhang, while leaving an analogous hydroxyl-terminated overhang largely intact. Such removal was dependent upon Ku, DNA-dependent protein kinase, and ATP. Together, these data suggest that Artemis-mediated cleavage of 3{prime} overhangs requires a minimum of 2 nucleotides, or a nucleotide plus a phosphoglycolate, 3{prime} to the cleavage site. Shorter 3{prime}-phosphoglycolate-terminated overhangs and blunt ends were also processed by Artemis, but much less efficiently. Consistent with the in vitro substrate specificity of Artemis, human cells lacking Artemis exhibited hypersensitivity to X-rays, bleomycin and neocarzinostatin, which all induce 3{prime}-phosphoglycolate-terminated double-strand breaks. Collectively, these results suggest that 3{prime}-phosphoglycolate termini and/or specific classes of DNA ends that arise from such blocked termini are relevant Artemis substrates in vivo.

  12. A differential autophagy-dependent response to DNA double-strand breaks in bone marrow mesenchymal stem cells from sporadic ALS patients.

    Science.gov (United States)

    Wald-Altman, Shane; Pichinuk, Edward; Kakhlon, Or; Weil, Miguel

    2017-05-01

    Amyotrophic lateral sclerosis (ALS) is an incurable motor neurodegenerative disease caused by a diversity of genetic and environmental factors that leads to neuromuscular degeneration and has pathophysiological implications in non-neural systems. Our previous work showed abnormal levels of mRNA expression for biomarker genes in non-neuronal cell samples from ALS patients. The same genes proved to be differentially expressed in the brain, spinal cord and muscle of the SOD1(G93A) ALS mouse model. These observations support the idea that there is a pathophysiological relevance for the ALS biomarkers discovered in human mesenchymal stem cells (hMSCs) isolated from bone marrow samples of ALS patients (ALS-hMSCs). Here, we demonstrate that ALS-hMSCs are also a useful patient-based model to study intrinsic cell molecular mechanisms of the disease. We investigated the ALS-hMSC response to oxidative DNA damage exerted by neocarzinostatin (NCS)-induced DNA double-strand breaks (DSBs). We found that the ALS-hMSCs responded to this stress differently from cells taken from healthy controls (HC-hMSCs). Interestingly, we found that ALS-hMSC death in response to induction of DSBs was dependent on autophagy, which was initialized by an increase of phosphorylated (p)AMPK, and blocked by the class III phosphoinositide 3-kinase (PI3K) and autophagy inhibitor 3-methyladenine (3MeA). ALS-hMSC death in response to DSBs was not apoptotic as it was caspase independent. This unique ALS-hMSC-specific response to DNA damage emphasizes the possibility that an intrinsic abnormal regulatory mechanism controlling autophagy initiation exists in ALS-patient-derived hMSCs. This mechanism may also be relevant to the most-affected tissues in ALS. Hence, our approach might open avenues for new personalized therapies for ALS. © 2017. Published by The Company of Biologists Ltd.

  13. DNA double strand breaks but not interstrand crosslinks prevent progress through meiosis in fully grown mouse oocytes.

    Directory of Open Access Journals (Sweden)

    Wai Shan Yuen

    Full Text Available There is some interest in how mammalian oocytes respond to different types of DNA damage because of the increasing expectation of fertility preservation in women undergoing chemotherapy. Double strand breaks (DSBs induced by ionizing radiation and agents such as neocarzinostatin (NCS, and interstrand crosslinks (ICLs induced by alkylating agents such as mitomycin C (MMC, are toxic DNA lesions that need to be repaired for cell survival. Here we examined the effects of NCS and MMC treatment on oocytes collected from antral follicles in mice, because potentially such oocytes are readily collected from ovaries and do not need to be in vitro grown to achieve meiotic competency. We found that oocytes were sensitive to NCS, such that this ionizing radiation mimetic blocked meiosis I and caused fragmented DNA. In contrast, MMC had no impact on the completion of either meiosis I or II, even at extremely high doses. However, oocytes treated with MMC did show γ-H2AX foci and following their in vitro maturation and parthenogenetic activation the development of the subsequent embryos was severely compromised. Addition of MMC to 1-cell embryos caused a similarly poor level of development, demonstrating oocytes have eventual sensitivity to this ICL-inducing agent but this does not occur during their meiotic division. In oocytes, the association of Fanconi Anemia protein, FANCD2, with sites of ICL lesions was not apparent until entry into the embryonic cell cycle. In conclusion, meiotic maturation of oocytes is sensitive to DSBs but not ICLs. The ability of oocytes to tolerate severe ICL damage and yet complete meiosis, means that this type of DNA lesion goes unrepaired in oocytes but impacts on subsequent embryo quality.

  14. Analysis of local control in patients with non-Hodgkin's lymphoma according to the WHO classification

    Energy Technology Data Exchange (ETDEWEB)

    Sakata, K.; Someya, M.; Nagakura, H.; Oouchi, A.; Nakata, K.; Koito, K.; Hareyama, M. [Dept. of Radiology, Sapporo Medical Univ., School of Medicine, Sapporo (Japan); Satoh, M. [Dept. of Clinical Pathology, Sapporo Medical Univ., School of Medicine, Sapporo (Japan); Kogawa, K. [Dept. of Fourth Internal Medicine, Sapporo Medical Univ., School of Medicine, Sapporo (Japan); Himi, T. [Dept. of Otorhinolaryngology, Sapporo Medical Univ., School of Medicine, Sapporo (Japan)

    2005-06-01

    Purpose: to analyze the influence of radiotherapy doses, chemotherapy doses, and clinical parameters on in-field disease control to assess the optimal radiation doses for treatment of non-Hodgkin's lymphoma according to the newly proposed WHO classification. Patients and methods: subjects consisted of 35 extranodal marginal-zone B-cell lymphomas of mucosa-associated lymphoid tissue (MALT) type, 75 diffuse large B-cell lymphomas (DLBCL), 14 follicular lymphomas, 17 extranodal natural killer (NK)/T-cell lymphomas, nasal type, eight unclassified peripheral T-cell lymphomas, four anaplastic large-cell lymphomas, T/null cell type, and five others. 59 patients received radiotherapy alone. 98 patients received CHOP, modified CHOP, or more intensive chemotherapy, and six patients were treated with other combination. Results: no patients with MALT lymphoma had in-field local recurrence. There were no recurrences in DLBCL patients who received chemotherapy in which the doses of adriamycin were > 200 mg/m{sup 2}, nor in DLBCL patients who were treated with > 45 Gy. Only nine of 15 patients with T-cell lymphoma treated with {<=} 50 Gy and three of five patients treated with > 50 Gy had local control. The dose of adriamycin had no influence on local control of T-cell lymphoma. Conclusion: T/NK-cell lymphomas were more radioresistant than B-cell lymphomas. The prognosis for peripheral T/NK-cell lymphomas is poor even when treated by irradiation combined with chemotherapy. (orig.)

  15. Ultrasonic spectrum analysis for in vivo characterization of tumor microstructural changes in the evaluation of tumor response to chemotherapy using diagnostic ultrasound.

    Science.gov (United States)

    Lin, Chun-yi; Cao, Long-hui; Wang, Jian-wei; Zheng, Wei; Chen, Yao; Feng, Zi-zhen; Li, An-hua; Zhou, Jian-hua

    2013-06-21

    There is a strong need for early assessment of tumor response to chemotherapy in order to avoid the adverse effects of unnecessary chemotherapy and to allow early transition to second-line therapy. The purpose of this study was to determine the feasibility of ultrasonic spectral analysis for the in vivo characterization of changes in tumor microstructure in the evaluation of tumor response to chemotherapy using diagnostic ultrasound. Experiments were approved by the regional animal care committee. Twenty-four MCF-7 breast cancer bearing nude mice were treated with adriamycin or sterile saline administered by intraperitoneal injection. Ultrasonic radio-frequency (RF) data was collected using a clinically available ultrasound scanner (6-MHz linear transducer). Linear regression parameters (spectral slope and midband-fit) regarding the calibrated power spectra from the RF signals were tested to monitor tumor response to treatment. The section equivalent to the ultrasound imaging plane was stained with hematoxylin and eosin to allow for assessment of the density of tumor cell nuclei. Treatment with adriamycin significantly reduced tumor growth in comparison with the control group (p = 0.003). Significant changes were observed in the ultrasonic parameters of the treated relative to the untreated tumors (p analysis can detect changes in tumor microstructure after chemotherapy, and this will be helpful in the early evaluation tumor response to chemotherapy.

  16. Chemical constituents of Hericium erinaceum associated with the inhibitory activity against cellular senescence in human umbilical vascular endothelial cells.

    Science.gov (United States)

    Noh, Hyung Jun; Yang, Hyo Hyun; Kim, Geum Soog; Lee, Seung Eun; Lee, Dae Young; Choi, Je Hun; Kim, Seung Yu; Lee, Eun Suk; Ji, Seung Heon; Kang, Ki Sung; Park, Hye-Jin; Kim, Jae-Ryong; Kim, Ki Hyun

    2015-12-01

    Hericium erinaceum is an edible and medicinal mushroom widely used in Korea, Japan, and China. On the search for biologically active compounds supporting the medicinal usage, the MeOH extract of the fruiting bodies of H. erinaceum was investigated for its chemical constituents. Six compounds were isolated and identified as hericenone D (1), (22E,24R)-5α,8α-epidioxyergosta-6,22-dien-3β-ol (2), erinacerin B (3), hericenone E (4), hericenone F (5) and isohericerin (6) by comparing their spectroscopic data with previously reported values. The inhibitory effects on adriamycin-induced cellular senescence in human dermal fibroblasts (HDFs) and human umbilical vein endothelial cells (HUVECs) of the isolates (1-6) were studied. Among the isolated compounds, ergosterol peroxide (2) reduced senescence associated β-galactosidase (SA-β-gal) activity increased in HUVECs treated with adriamycin. According to experimental data obtained, the active compound may inspire the development of a new pharmacologically useful substance to be used in the treatment and prevention of age-related diseases.

  17. Any value of podocyte B7-1 as a biomarker in human MCD and FSGS?

    Science.gov (United States)

    Novelli, Rubina; Gagliardini, Elena; Ruggiero, Barbara; Benigni, Ariela; Remuzzi, Giuseppe

    2016-03-01

    Minimal change disease (MCD) and focal segmental glomerulosclerosis (FSGS) are the most common causes of nephrotic syndrome in children and in young adults. Relapsing MCD carries the risk of severe complications and prolonged immunosuppression, whereas FSGS remains largely untreatable and urgently needs more effective treatments. Recently, induction of B7-1 (CD80), an immune-related protein expressed by antigen-presenting cells, was observed in podocytes of MCD and FSGS patients, suggesting that B7-1 plays a role in the pathogenesis of these diseases, and hence that abatacept, a B7-1 inhibitor, could be a possible treatment. Since previous studies raised serious concerns regarding the reliability of immunohistochemical assays for B7-1 detection and the efficacy of B7-1 inhibitory treatment, we investigated B7-1 podocyte expression in MCD and FSGS patients. Using different primary antibodies and immunohistochemical assays, no significant upregulation of podocyte B7-1 was detected in patients' biopsies compared with controls. To further confirm our findings, we analyzed mice with adriamycin-induced nephropathy, a model of human FSGS, and mice injected with LPS as additional control. Podocyte B7-1 was not observed in mice injected with adriamycin or LPS either. In conclusion, since B7-1 is not induced in podocyte of MCD and FSGS patients, the antiproteinuric action of abatacept, if confirmed, may not be the result of an effect on podocyte B7-1. Copyright © 2016 the American Physiological Society.

  18. AATF/Che-1 acts as a phosphorylation-dependent molecular modulator to repress p53-driven apoptosis.

    Science.gov (United States)

    Höpker, Katja; Hagmann, Henning; Khurshid, Safiya; Chen, Shuhua; Hasskamp, Pia; Seeger-Nukpezah, Tamina; Schilberg, Katharina; Heukamp, Lukas; Lamkemeyer, Tobias; Sos, Martin L; Thomas, Roman K; Lowery, Drew; Roels, Frederik; Fischer, Matthias; Liebau, Max C; Resch, Ulrike; Kisner, Tülay; Röther, Fabian; Bartram, Malte P; Müller, Roman Ulrich; Fabretti, Francesca; Kurschat, Peter; Schumacher, Björn; Gaestel, Matthias; Medema, René H; Yaffe, Michael B; Schermer, Bernhard; Reinhardt, H Christian; Benzing, Thomas

    2012-10-17

    Following genotoxic stress, cells activate a complex signalling network to arrest the cell cycle and initiate DNA repair or apoptosis. The tumour suppressor p53 lies at the heart of this DNA damage response. However, it remains incompletely understood, which signalling molecules dictate the choice between these different cellular outcomes. Here, we identify the transcriptional regulator apoptosis-antagonizing transcription factor (AATF)/Che-1 as a critical regulator of the cellular outcome of the p53 response. Upon genotoxic stress, AATF is phosphorylated by the checkpoint kinase MK2. Phosphorylation results in the release of AATF from cytoplasmic MRLC3 and subsequent nuclear translocation where AATF binds to the PUMA, BAX and BAK promoter regions to repress p53-driven expression of these pro-apoptotic genes. In xenograft experiments, mice exhibit a dramatically enhanced response of AATF-depleted tumours following genotoxic chemotherapy with adriamycin. The exogenous expression of a phospho-mimicking AATF point mutant results in marked adriamycin resistance in vivo. Nuclear AATF enrichment appears to be selected for in p53-proficient endometrial cancers. Furthermore, focal copy number gains at the AATF locus in neuroblastoma, which is known to be almost exclusively p53-proficient, correlate with an adverse prognosis and reduced overall survival. These data identify the p38/MK2/AATF signalling module as a critical repressor of p53-driven apoptosis and commend this pathway as a target for DNA damage-sensitizing therapeutic regimens.

  19. Utility of liposomes coated with polysaccharide bearing 1-amino-lactose as targeting chemotherapy for AH66 hepatoma cells.

    Science.gov (United States)

    Yamamoto, M; Ichinose, K; Ishii, N; Khoji, T; Akiyoshi, K; Moriguchi, N; Sunamoto, J; Kanematsu, T

    2000-01-01

    The cell recognition element is very important for drug delivery systems. We synthesized cholesteryl pullulan (CHP) bearing 1-aminolactose (1-AL) and introduced a saccharide, cholesteryl pullulan bearing 1-aminolactose (1-AL/CHP), to an outer layer of the conventional liposome as a cell recognition element. Lectin recognized the beta-galactose by aggregation of 1-AL/CHP coated liposome (1-AL/CHP liposome). The uptake of this liposome to AH66 rat hepatoma cells was greater than in liposomes without 1-aminolactose in vitro. Furthermore, 1-AL/CHP liposomal adriamycin showed a stronger antitumor effect in comparison with other types of liposomal adriamycin in vitro. When in vivo tumor-targeting efficacy was investigated in AH66 tumor transplanted mice using 3H-liposome, the tumor/serum radioactivity ratio in mice injected with 1-AL/CHP liposome was higher than that of mice injected with other liposomes. These observations suggest that 1-AL is effective as a cell recognition element. As a result, 1-AL/CHP liposome is considered to be a good carrier of anticancer drugs for the active targeting of tumor cells.

  20. The Role of Doppler Ultrasound in Assessing the Therapeutic Response in Advanced Breast Cancer

    Directory of Open Access Journals (Sweden)

    Jamal Eyvazi-Ziaei

    2018-01-01

    Full Text Available Background and Objectives: Breast cancer is one of the most common cancers in Iran, which neo-adjuvant chemotherapy used to treat in advanced types to reduce tumor burden. The aim of this study was to evaluate the ultrasound scales of patients with advanced disease, using two common treatment methods include TACs (Taxotere, Adriamycin, and Cyclophosphamide and AC (Adriamycin, Cyclophosphamide. Material and Methods: Clinical examination and Doppler ultrasound were performed before and after treatment. Before and after the treatment, the size of the primary tumor and tumor vascularization, and the ultrasound Resistivity Index (RI, Pulsality Index (PI, Peak Systolic Velocity (PSV and the condition of the anterior lymph nodes, and the effect of two different therapies were investigated in response to treatment. The SPSS statistical software 17.0 was used to evaluate the relationship between the variables with 95% confidence interval, and P≤ 0.05. Results: The mean age of the patients was 48.90 (±10.58 SD years. From these, 8 were postmenopausal and 9 were menopausal, and in 3 cases the situation was unknown. There was significant difference between the PSV levels of the main breast mass, pre and post chemotherapy (P=0.004. Changes in other indexes of breast mass and axillary mass were not statistical significant. Conclusion: Color Doppler ultrasonography seems to be a promising alternative as an independent and complementary tool, to assess the response to treatment of breast masses to primary medical treatment in advanced breast cancers.

  1. Which Hodgkin's patients in the Unites States should be treated with BEACOPP?

    Science.gov (United States)

    Cheson, Bruce D

    2014-09-01

    The majority of patients with advanced Hodgkin lymphoma are cured with current standard therapy such as Adriamycin, bleomycin, vinblastine, and dacarbazine (ABVD). However, almost 20% of patients fail to achieve complete remission, and depending upon risk group, 20-30% experience relapse with prolonged follow-up. BEACOPP (bleomycin, etoposide, Adriamycin, cyclophosphamide, prednisone, procarbazine) was developed by the German Hodgkin Study Group (GHSG) to improve upon standard therapy by intensifying treatment and substituting etoposide and procarbazine for vinblastine and dacarbazine, respectively. In the HD9 trial, escalated BEACOPP was shown to be superior to COPP/ABVD with regard to time to treatment failure, but was associated with increased risk of secondary malignancies. Modifications of BEACOPP were developed to maintain efficacy while reducing the adverse effects. While several randomized trials have confirmed prolongation of progression-free survival with BEACOPP compared to ABVD, a survival advantage has been difficult to demonstrate. Given the comparable survival between BEACOPP and ABVD, as well as the greater toxicities of the former, including infertility, myelosuppression, and secondary malignancies, ABVD should remain the standard regimen for patients in the U.S. Newer regimens incorporating novel agents such as brentuximab vedotin may further improve the efficacy of current regimens.

  2. Continuous extraction of urinary anthracycline antitumor antibiotics with the horizontal flow-through coil planet centrifuge.

    Science.gov (United States)

    Nakazawa, H; Riggs, C E; Egorin, M J; Redwood, S M; Bachur, N R; Bhatnagar, R; Ito, Y

    1984-05-11

    Extraction of doxorubicin (adriamycin) and daunorubicin and their metabolites from human urine was attempted utilizing the horizontal flow-through coil planet centrifuge. Partition coefficients of the drugs for various combinations of non-aqueous phases and aqueous salt solutions were determined. Optimal coefficients for adriamycin and daunorubicin were achieved with n-butanol-0.3 M disodium hydrogen phosphate. Extraction efficiencies of the drugs from human urine comparable to those obtained by standard resin column techniques could be realized by employing the n-butanol-urine (containing 0.3 M disodium hydrogen phosphate) system in the coil planet centrifuge, at flow-rates of 500-600 ml/h, and at 650 rpm revolutional speed. Small quantities of drugs and metabolites could be continuously concentrated into small volumes of the n-butanol phase from large volumes of salted urine. The versatility of the technique was demonstrated by its application to extraction of aclacinomycin A, a novel anthracycline antitumor agent, and its metabolites from human urine.

  3. Characterization of a human ovarian carcinoma cell line: UCI 101.

    Science.gov (United States)

    Fuchtner, C; Emma, D A; Manetta, A; Gamboa, G; Bernstein, R; Liao, S Y

    1993-02-01

    A new epithelial ovarian carcinoma cell line (UCI 101) has been established from the ascitic fluids and solid tumor of a patient with progressive papillary adenocarcinoma of the ovary shown previously to be refractory to combination chemotherapy consisting of cyclophosphamide, Adriamycin, and cisplatin as well as single-agent chemotherapy of taxol and high-dose cisplatin. The UCI 101 cell line grows well with an in vitro doubling time of 24 hr. The cell line expresses the B 72.3 (Tag 72), CA125, MH99 (ESA), and E29 (EMA) cell surface antigens and AE1/AE3 cytokeratins. This cell line overexpresses (as determined by immunocytochemistry) both p-glycoprotein and the epidermal growth factor receptor. The in vitro drug response to single agents including Adriamycin, cisplatin, dequalinium chloride, etoposide, 5-fluorouracil, taxol, and tumor necrosis factor was examined. Intraperitoneal transplantation of the cells into athymic mice resulted in foci of tumor on all peritoneal surfaces including the viscera and diaphragm ultimately leading to solid bulky disease with massive production of ascites. High levels of CA125 (> 500 units/ml) were detected in the serum of tumor-bearing mice. Cytogenetic analysis of cultured cells shows several marker chromosomes containing deletions, duplications, and translocations. Cytologic and histologic evaluation of the xenograft revealed morphological characteristics identical to those of the original tumor.

  4. Reversal of multidrug resistance by surfactants.

    Science.gov (United States)

    Woodcock, D. M.; Linsenmeyer, M. E.; Chojnowski, G.; Kriegler, A. B.; Nink, V.; Webster, L. K.; Sawyer, W. H.

    1992-01-01

    Cremophor EL, a pharmacologically inactive solubilising agent, has been shown to reverse multidrug resistance (MDR). Using flow cytometric evaluation of equilibrium intracellular levels of daunorubicin (DNR), we found that eight other surface active agents will also reverse MDR. All the active detergents contain polyethoxylated moieties but have no similarities in their hydrophobic components. The properties of three polyethoxylated surfactants that showed the lowest toxicities, Cremophor, Tween 80 and Solutol HS15, were examined in more detail. The concentrations of Tween 80 and Solutol required to reverse DNR exclusion were 10-fold lower than for Cremophor. However while concentrations greater than or equal to 1:10(2) of the former two surfactants resulted in breakdown of cells, even 1:10 of Cremophor did not lyse cells. Studies of the effects of Cremophor on the uptake and efflux of DNR in normal and MDR cell types showed that Cremophor increases intracellular DNR primarily by locking the rapid efflux from the cells. This blockage of drug efflux may be mediated by a substantial alteration in the fluidity of cell membranes induced by Cremophor, as shown by decreased fluorescence anisotropy of a membrane probe. Consistent with these data, coinjection of adriamycin plus Cremophor into mice carrying a multidrug resistant P388 transplantable tumour significantly increased the survival time of the mice compared with adriamycin treatment alone. PMID:1637678

  5. Radiometric prescreen for antitumor activity with Saccharomyces cerevisiae mutant strain.

    Science.gov (United States)

    Speedie, M K; Fique, D V; Blomster, R N

    1980-07-01

    After modification, a technique for radiometrically measuring bacterial growth has been applied to a mutant strain of Saccharomyces cerevisiae. The assay is based on inhibition of 14CO2 release from [14C]glucose, which provides an extremely sensitive measure of cellular respiratory activity and growth. The criterion for antitumor activity is the differential inhibition of wild-type and mutant (distorted cell membrane) strains of the yeast. The system was optimized for medium, time of incubation, temperature, and size of inoculum. Known antitumor agents, including bleomycin, actinomycin D, adriamycin, and ellipticine were tested in the system, and differential inhibition was observed. Vincristine showed no inhibitory effects at the concentrations tried. The sensitivity for 20% inhibition ranged from 0.8 micrograms of adriamycin per ml to 0.14 mg of ellipticine per ml. Antifungal agents such as amphotericin B exhibited no differential inhibition. Antibacterial agents were inactive. This method may provide a rapid, sensitive, in vitro quantitative assay for antitumor agents which could be applied to a variety of assay needs and which can be run with facilities and equipment available in most laboratories.

  6. [Intraoperative transient incomplete left bundle branch block in a patient with left axis deviation in pre-anesthetic electrocardiogram].

    Science.gov (United States)

    Sunaguchi, M; Imai, H; Shigemi, K; Imai, R; Ozaki, Y; Nakamura, Y; Tanaka, Y

    1998-11-01

    We encountered a case of transient incomplete left bundle branch block (TILBBB) during standard mastectomy under general anesthesia. The patient was a 40 year-old female (70 kg, 164 cm) without any abnormalities on preanesthetic examinations except -61 degrees left axis deviation in exercise electrocardiogram. Adriamycin 20 mg was administered preoperatively. After the skin incision, heart rate increased from 104 min-1 to 130 min-1 and the cardiac axis gradually rotated leftward with increasing Q wave depth on leads I and aVL. We diagnosed this as blockade of the anterior branch in the left bundle branch. After the administration of fentanyl (0.2 mg) and sevoflurane (3%), the heart rate decreased to 105 min-1 and the electrocardiogram returned to the initial wave form. This anesthetic course indicated that adriamycin had slightly damaged the cardiac muscle and inadequate anesthesia had caused tachycardia and transient left bundle branch block. Left axis deviation on preoperative exercise electrocardiogram suggests that the left bundle branch can easily be blocked with an increasing heart rate. Adequate depth of anesthesia would have prevented the increase in heart rate and abnormality in the cardiac conduction process.

  7. Effects of Single and Combined Losartan and Tempol Treatments on Oxidative Stress, Kidney Structure and Function in Spontaneously Hypertensive Rats with Early Course of Proteinuric Nephropathy.

    Science.gov (United States)

    Karanovic, Danijela; Grujic-Milanovic, Jelica; Miloradovic, Zoran; Ivanov, Milan; Jovovic, Djurdjica; Vajic, Una-Jovana; Zivotic, Maja; Markovic-Lipkovski, Jasmina; Mihailovic-Stanojevic, Nevena

    2016-01-01

    Oxidative stress has been widely implicated in both hypertension and chronic kidney disease (CKD). Hypertension is a major risk factor for CKD progression. In the present study we have investigated the effects of chronic single tempol (membrane-permeable radical scavenger) or losartan (angiotensin II type 1 receptor blocker) treatment, and their combination on systemic oxidative status (plasma thiobarbituric acid-reactive substances (pTBARS) production, plasma antioxidant capacity (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid, pABTS), erythrocyte antioxidant enzymes activities) and kidney oxidative stress (kTBARS, kABTS, kidney antioxidant enzymes activities), kidney function and structure in spontaneously hypertensive rats (SHR) with the early course of adriamycin-induced nephropathy. Adult SHR were divided into five groups. The control group received vehicle, while the other groups received adriamycin (2 mg/kg, i.v.) twice in a 21-day interval, followed by vehicle, losartan (L,10 mg/kg/day), tempol (T,100 mg/kg/day) or combined T+L treatment (by gavage) during a six-week period. Adriamycin significantly increased proteinuria, plasma lipid peroxidation, kidney protein oxidation, nitrite excretion, matrix metalloproteinase-1 (MMP-1) protein expression and nestin immunostaining in the kidney. Also, it decreased kidney antioxidant defense, kidney NADPH oxidase 4 (kNox4) protein expression and abolished anti-inflammatory response due to significant reduction of kidney NADPH oxidase 2 (kNox2) protein expression in SHR. All treatments reduced protein-to-creatinine ratio (marker of proteinuria), pTBARS production, kidney protein carbonylation, nitrite excretion, increased antioxidant capacity and restored kidney nestin expression similar to control. Both single treatments significantly improved systemic and kidney antioxidant defense, bioavailability of renal nitric oxide, reduced kMMP-1 protein expression and renal injury, thus retarded CKD progression

  8. Involved-Node Proton Therapy in Combined Modality Therapy for Hodgkin Lymphoma: Results of a Phase 2 Study

    Energy Technology Data Exchange (ETDEWEB)

    Hoppe, Bradford S., E-mail: bhoppe@floridaproton.org [Radiation Oncology, University of Florida Proton Therapy Institute, Jacksonville, Florida (United States); Flampouri, Stella [Radiation Oncology, University of Florida Proton Therapy Institute, Jacksonville, Florida (United States); Zaiden, Robert [Department of Medicine, Division of Hematology and Oncology, University of Florida College of Medicine, Jacksonville, Florida (United States); Slayton, William [Department of Pediatrics, Division of Hematology and Oncology, University of Florida College of Medicine, Gainesville, Florida (United States); Sandler, Eric [Department of Pediatrics, Division of Hematology/Oncology Nemours Children' s Clinic, Jacksonville, Florida (United States); Ozdemir, Savas [Department of Radiology, Division of Functional and Molecular Imaging, University of Florida College of Medicine, Jacksonville, Florida (United States); Dang, Nam H.; Lynch, James W. [Department of Medicine, Division of Hematology and Oncology, University of Florida College of Medicine, Gainesville, Florida (United States); Li, Zuofeng; Morris, Christopher G.; Mendenhall, Nancy P. [Radiation Oncology, University of Florida Proton Therapy Institute, Jacksonville, Florida (United States)

    2014-08-01

    Purpose: This study describes the early clinical outcomes of a prospective phase 2 study of consolidative involved-node proton therapy (INPT) as a component of combined-mode therapy in patients with stages I to III Hodgkin lymphoma (HL) with mediastinal involvement. Methods and Materials: Between September 2009 and June 2013, 15 patients with newly diagnosed HL received INPT after completing chemotherapy in an institutional review board-approved protocol comparing the dosimetric impact of PT with those of three-dimensional conformal radiation therapy (3DCRT) and intensity modulated RT. Based on {sup 18}F-Fluorodeoxyglucose positron emission tomography/computed tomography ({sup 18}F-FDG PET/CT) response, 5 children received 15 to 25.5 cobalt Gy equivalent (CGE) of INPT after receiving 4 cycles of Adriamycin, Bleomycin, Vincristine, Etoposide, Prednisone, Cyclophosphamide or Vincristine, adriamycin, methotrexate, Prednisone chemotherapy, and 10 adults received 30.6 to 39.6 CGE of INPT after 3 to 6 cycles of Adriamycin, Bleomycine, Vinblastine, Dacarbazine. Patients were routinely evaluated for toxicity during and after treatment, using Common Terminology Criteria for Adverse Events, version 3.0, and for relapse by physical examination and routine imaging. Relapse-free survival (RFS) and event-free survival (EFS) rates were calculated using the Kaplan-Meier method from the time of diagnosis. Results: The median follow-up was 37 months (range, 26-55). Two events occurred during follow-up: 1 relapse (inside and outside the targeted field) and 1 transformation into a primary mediastinal large B cell lymphoma. The 3-year RFS rate was 93%, and the 3-year EFS rate was 87%. No acute or late grade 3 nonhematologic toxicities were observed. Conclusions: Although decades of follow-up will be needed to realize the likely benefit of PT in reducing the risk of radiation-induced late effects, PT following chemotherapy in patients with HL is well-tolerated, and disease outcomes

  9. Methamphetamine increases Prion Protein and induces dopamine-dependent expression of protease resistant PrPsc.

    Science.gov (United States)

    Ferrucci, M; Ryskalin, L; Biagioni, F; Gambardella, S; Busceti, C L; Falleni, A; Lazzeri, G; Fornai, F

    2017-07-01

    The cellular prion protein (PrPc) is physiologically expressed within selective brain areas of mammals. Alterations in the secondary structure of this protein lead to scrapie-like prion protein (PrPsc), which precipitates in the cell. PrPsc has been detected in infectious, inherited or sporadic neurodegenerative disorders. Prion protein metabolism is dependent on autophagy and ubiquitin proteasome. Despite not being fully elucidated, the physiological role of prion protein relates to chaperones which rescue cells under stressful conditions.Methamphetamine (METH) is a widely abused drug which produces oxidative stress in various brain areas causing mitochondrial alterations and protein misfolding. These effects produce a compensatory increase of chaperones while clogging cell clearing pathways. In the present study, we explored whether METH administration modifies the amount of PrPc. Since high levels of PrPc when the clearing systems are clogged may lead to its misfolding into PrPsc, we further tested whether METH exposure triggers the appearance of PrPsc. We analysed the effects of METH and dopamine administration in PC12 and striatal cells by using SDS-PAGE Coomassie blue, immune- histochemistry and immune-gold electron microscopy. To analyze whether METH administration produces PrPsc aggregates we used antibodies directed against PrP following exposure to proteinase K or sarkosyl which digest folded PrPc but misfolded PrPsc. We fond that METH triggers PrPsc aggregates in DA-containing cells while METH is not effective in primary striatal neurons which do not produce DA. In the latter cells exogenous DA is needed to trigger PrPsc accumulation similarly to what happens in DA containing cells under the effects of METH. The present findings, while fostering novel molecular mechanisms involving prion proteins, indicate that, cell pathology similar to prion disorders can be mimicked via a DA-dependent mechanism by a drug of abuse.

  10. Mouse-adapted ovine scrapie prion strains are characterized by different conformers of PrPSc.

    Science.gov (United States)

    Thackray, Alana M; Hopkins, Lee; Klein, Michael A; Bujdoso, Raymond

    2007-11-01

    The agent responsible for prion disease may exist in different forms, commonly referred to as strains, with each carrying the specific information that determines its own distinct biological properties, such as incubation period and lesion profile. Biological strain typing of ovine scrapie isolates by serial passage in conventional mice has shown some diversity in ovine prion strains. However, this biological diversity remains poorly supported by biochemical prion strain typing. The protein-only hypothesis predicts that variation between different prion strains in the same host is manifest in different conformations adopted by PrPSc. Here we have investigated the molecular properties of PrPSc associated with two principal Prnp(a) mouse-adapted ovine scrapie strains, namely, RML and ME7, in order to establish biochemical prion strain typing strategies that may subsequently be used to discriminate field cases of mouse-passaged ovine scrapie isolates. We used a conformation-dependent immunoassay and a conformational stability assay, together with Western blot analysis, to demonstrate that RML and ME7 PrPSc proteins show distinct biochemical and physicochemical properties. Although RML and ME7 PrPSc proteins showed similar resistance to proteolytic digestion, they differed in their glycoform profiles and levels of proteinase K (PK)-sensitive and PK-resistant isoforms. In addition, the PK-resistant core (PrP27-30) of ME7 was conformationally more stable following exposure to guanidine hydrochloride or Sarkosyl than was RML PrP27-30. Our data show that mouse-adapted ovine scrapie strains can be discriminated by their distinct conformers of PrPSc, which provides a basis to investigate their diversity at the molecular level.

  11. MSA prions exhibit remarkable stability and resistance to inactivation.

    Science.gov (United States)

    Woerman, Amanda L; Kazmi, Sabeen A; Patel, Smita; Freyman, Yevgeniy; Oehler, Abby; Aoyagi, Atsushi; Mordes, Daniel A; Halliday, Glenda M; Middleton, Lefkos T; Gentleman, Steve M; Olson, Steven H; Prusiner, Stanley B

    2018-01-01

    In multiple system atrophy (MSA), progressive neurodegeneration results from the protein α-synuclein misfolding into a self-templating prion conformation that spreads throughout the brain. MSA prions are transmissible to transgenic (Tg) mice expressing mutated human α-synuclein (TgM83+/-), inducing neurological disease following intracranial inoculation with brain homogenate from deceased patient samples. Noting the similarities between α-synuclein prions and PrP scrapie (PrPSc) prions responsible for Creutzfeldt-Jakob disease (CJD), we investigated MSA transmission under conditions known to result in PrPSc transmission. When peripherally exposed to MSA via the peritoneal cavity, hind leg muscle, and tongue, TgM83+/- mice developed neurological signs accompanied by α-synuclein prions in the brain. Iatrogenic CJD, resulting from PrPSc prion adherence to surgical steel instruments, has been investigated by incubating steel sutures in contaminated brain homogenate before implantation into mouse brain. Mice studied using this model for MSA developed disease, whereas wire incubated in control homogenate had no effect on the animals. Notably, formalin fixation did not inactivate α-synuclein prions. Formalin-fixed MSA patient samples also transmitted disease to TgM83+/- mice, even after incubating in fixative for 244 months. Finally, at least 10% sarkosyl was found to be the concentration necessary to partially inactivate MSA prions. These results demonstrate the robustness of α-synuclein prions to denaturation. Moreover, they establish the parallel characteristics between PrPSc and α-synuclein prions, arguing that clinicians should exercise caution when working with materials that might contain α-synuclein prions to prevent disease.

  12. Proteomic profiling of the outer membrane fraction of the obligate intracellular bacterial pathogen Ehrlichia ruminantium.

    Directory of Open Access Journals (Sweden)

    Amal Moumène

    Full Text Available The outer membrane proteins (OMPs of Gram-negative bacteria play a crucial role in virulence and pathogenesis. Identification of these proteins represents an important goal for bacterial proteomics, because it aids in vaccine development. Here, we have developed such an approach for Ehrlichia ruminantium, the obligate intracellular bacterium that causes heartwater. A preliminary whole proteome analysis of elementary bodies, the extracellular infectious form of the bacterium, had been performed previously, but information is limited about OMPs in this organism and about their role in the protective immune response. Identification of OMPs is also essential for understanding Ehrlichia's OM architecture, and how the bacterium interacts with the host cell environment. First, we developed an OMP extraction method using the ionic detergent sarkosyl, which enriched the OM fraction. Second, proteins were separated via one-dimensional electrophoresis, and digested peptides were analyzed via nano-liquid chromatographic separation coupled with mass spectrometry (LC-MALDI-TOF/TOF. Of 46 unique proteins identified in the OM fraction, 18 (39% were OMPs, including 8 proteins involved in cell structure and biogenesis, 4 in transport/virulence, 1 porin, and 5 proteins of unknown function. These experimental data were compared to the predicted subcellular localization of the entire E. ruminantium proteome, using three different algorithms. This work represents the most complete proteome characterization of the OM fraction in Ehrlichia spp. The study indicates that suitable subcellular fractionation experiments combined with straightforward computational analysis approaches are powerful for determining the predominant subcellular localization of the experimentally observed proteins. We identified proteins potentially involved in E. ruminantium pathogenesis, which are good novel targets for candidate vaccines. Thus, combining bioinformatics and proteomics, we

  13. Proteomic Profiling of the Outer Membrane Fraction of the Obligate Intracellular Bacterial Pathogen Ehrlichia ruminantium

    Science.gov (United States)

    Moumène, Amal; Marcelino, Isabel; Ventosa, Miguel; Gros, Olivier; Lefrançois, Thierry; Vachiéry, Nathalie

    2015-01-01

    The outer membrane proteins (OMPs) of Gram-negative bacteria play a crucial role in virulence and pathogenesis. Identification of these proteins represents an important goal for bacterial proteomics, because it aids in vaccine development. Here, we have developed such an approach for Ehrlichia ruminantium, the obligate intracellular bacterium that causes heartwater. A preliminary whole proteome analysis of elementary bodies, the extracellular infectious form of the bacterium, had been performed previously, but information is limited about OMPs in this organism and about their role in the protective immune response. Identification of OMPs is also essential for understanding Ehrlichia’s OM architecture, and how the bacterium interacts with the host cell environment. First, we developed an OMP extraction method using the ionic detergent sarkosyl, which enriched the OM fraction. Second, proteins were separated via one-dimensional electrophoresis, and digested peptides were analyzed via nano-liquid chromatographic separation coupled with mass spectrometry (LC-MALDI-TOF/TOF). Of 46 unique proteins identified in the OM fraction, 18 (39%) were OMPs, including 8 proteins involved in cell structure and biogenesis, 4 in transport/virulence, 1 porin, and 5 proteins of unknown function. These experimental data were compared to the predicted subcellular localization of the entire E. ruminantium proteome, using three different algorithms. This work represents the most complete proteome characterization of the OM fraction in Ehrlichia spp. The study indicates that suitable subcellular fractionation experiments combined with straightforward computational analysis approaches are powerful for determining the predominant subcellular localization of the experimentally observed proteins. We identified proteins potentially involved in E. ruminantium pathogenesis, which are good novel targets for candidate vaccines. Thus, combining bioinformatics and proteomics, we discovered new OMPs

  14. Colocalization of phosphorylated forms of WAVE1, CRMP2, and tau in Alzheimer's disease model mice: Involvement of Cdk5 phosphorylation and the effect of ATRA treatment.

    Science.gov (United States)

    Watamura, Naoto; Toba, Junya; Yoshii, Aya; Nikkuni, Miyu; Ohshima, Toshio

    2016-01-01

    Alzheimer's disease (AD) is the most common type of dementia among the elderly. Neurofibrillary tangles (NFTs), a major pathological hallmark of AD, are composed of tau protein that is hyperphosphorylated by cyclin-dependent kinase 5 (Cdk5) and glycogen synthase kinase 3β (GSK3β). NFTs also contain Wiskott-Aldrich syndrome protein family verprolin-homologous protein 1 (WAVE1) and collapsin response-mediator protein 2 (CRMP2). Although Cdk5 is known to phosphorylate tau, WAVE1, and CRMP2, the significance of this with respect to NFT formation remains to be elucidated. This study examines the involvement of phosphorylated (p-) CRMP2 and WAVE1 in p-tau aggregates using a triple-transgenic (3×Tg; APPswe/PS1M146V/tauP301L) AD mouse model. First, we verified the colocalization of p-WAVE1 and p-CRMP2 with aggregated hyperphosphorylated tau in the hippocampus at 23 months of age. Biochemical analysis revealed the inclusion of p-WAVE1, p-CRMP2, and tau in the sarkosyl-insoluble fractions of hippocampal homogenates. To test the significance of phosphorylation of these proteins further, we administered all-trans-retinoic acid (ATRA) to the 3×Tg mice, which downregulates Cdk5 and GSK3β activity. In ATRA-treated mice, fewer and smaller tau aggregates were observed compared with non-ATRA-treated mice. These results suggest the possibility of novel therapeutic target molecules for preventing tau pathology. © 2015 Wiley Periodicals, Inc.

  15. Effect of ionic detergents, nonionic detergents, and chaotropic agents on polyphenol oxidase activity from dormant saffron (Crocus sativus L.) corms.

    Science.gov (United States)

    Saeidian, Shahriar; Keyhani, Ezzatollah; Keyhani, Jacqueline

    2007-05-02

    Polyphenol oxidase (PPO; EC 1.14.18.1) catalyzes the hydroxylation of monophenols to o-diphenols (cresolase activity) and the oxidation of o-diphenols to o-quinones (catecholase activity), leading to browning in plants and produce. Further interest in the enzyme has been triggered by the active role that it plays in plant defense systems. PPO can be found in latent forms and is activated in vitro by various agents including urea, detergents, and proteases. The activation of PPO from several sources by sodium dodecyl sulfate (SDS) has been extensively investigated, but reports on the effect of other detergents or on the differential effect of detergents on each of PPO's activities are scarce. In addition, investigations on the enzyme in other plant parts besides fruits and vegetables are also scarce. Here, the effect of various detergents and chaotropic agents on PPO from dormant saffron (Crocus sativus L.) corm extract was investigated. SDS and sarkosyl activated the cresolase activity, while only SDS activated the catecholase activity. All other detergents tested, in milli- or micromolar concentrations, inhibited the cresolase activity but barely affected the catecholase activity. In contrast, urea and guanidine-HCl drastically inhibited the catecholase activity but moderately inhibited the cresolase activity. The same effects were obtained on the partially purified enzyme. Results identified a PPO, present in dormant corms, which was activated only by anionic detergents and was inhibited by other reputed activating agents such as urea. Results also emphasized the differences in structure and accessibility of the active sites for cresolase and catecholase activities.

  16. Caso para diagnóstico Case for diagnosis

    Directory of Open Access Journals (Sweden)

    Cristina Paula Salaro

    2011-08-01

    Full Text Available Paciente do sexo masculino de 55 anos com placas e nódulos infiltrados exuberantes em membro inferior esquerdo há seis meses. Cardiopatia, nefropatia e endocrinopatia associadas. O exame histopatológico, acrescido da imunoistoquímica, confirma linfoma cutâneo difuso de células B. Marcadores CD-20, CD-79a e Ki-67 foram positivos. A quimioterapia com ciclofosfamida, adriamicina e vincristina promoveu remissão parcialA fifty-five year old Caucasian male presented with infiltrated plaques and nodules on the left leg. The lesions had been present for 6 months. He presented associated cardiopathy, nephropathy and endocrinopathy. Histopathological and immunohistochemical examinations confirmed the diagnosis of cutaneous diffuse B cell lymphoma. CD 20, CD 79a and Ki-67 were positive. Chemotherapy with cyclophosphamide, adriamycin and vincristine promoted partial remission

  17. Urinary collagen degradation products as early markers of progressive renal fibrosis

    DEFF Research Database (Denmark)

    Hijmans, Ryanne S.; Rasmussen, Daniel Guldager Kring; Yazdani, Saleh

    2017-01-01

    Background: Renal fibrogenesis is associated with increased ECM remodeling and release of collagen fragments in urine in progressive renal disease. We investigated the diagnostic value of urinary collagen degradation products in a proteinuria-driven fibrosis rat model with and without anti......-fibrotic S1P-receptor modulator FTY720 treatment. Methods: Proteinuria was induced in male Wistar rats by Adriamycin (ADR) injection (n = 16). Healthy rats served as controls (n = 12). Six weeks post-injection, all underwent renal biopsy, and FTY720-treatment started in ADR-rats (n = 8) and controls (n = 6......). Others remained untreated. Rats were sacrificed after 12 weeks. Collagen type I (C1M) and III (C3M) degradation fragments were measured in blood and urine using ELISA. Kidneys were stained for various inflammatory and fibrotic markers. Results: Six weeks post-injection proteinuria increased (versus...

  18. Phase I clinical trial of nintedanib plus paclitaxel in early HER-2-negative breast cancer (CNIO-BR-01-2010/GEICAM-2010-10 study)

    Science.gov (United States)

    Quintela-Fandino, M; Urruticoechea, A; Guerra, J; Gil, M; Gonzalez-Martin, A; Marquez, R; Hernandez-Agudo, E; Rodriguez-Martin, C; Gil-Martin, M; Bratos, R; Escudero, M J; Vlassak, S; Hilberg, F; Colomer, R

    2014-01-01

    Introduction: Previous small-molecule antiangiogenics have compromised chemotherapy dose intensity in breast cancer. We present a phase I trial of a novel selective agent, nintedanib, plus standard chemotherapy in early breast cancer. Methods: Her-2-negative breast cancer patients with tumours larger than 2 cm were eligible for dose-escalation trial (classic 3+3 method). Results: The recommended phase II dose (RP2D) was 150 mg BID of nintedanib combined with standard dose of weekly paclitaxel followed by adriamycin plus cyclophosphamide. The dose-limiting toxicity was transaminase elevation. At the RP2D, the dose intensity was ∼100%. The pathologic complete response was 50%. Conclusions: The combination allows the delivery of full-dose intensity, while efficacy seems promising. PMID:25058346

  19. Regional immunotherapy has a detrimental effect on the response to combined irradiation and chemotherapy in locally advanced non-small cell bronchognic carcinoma

    Energy Technology Data Exchange (ETDEWEB)

    Ruckdeschel, J.C.; De Vore, C.; Caradonna, R.; Horton, J.; McKneally, M.F.; Kellar, S.; McIlduff, J.B.; Baxter, D.H.; Killam, D.; Sedransk, N.

    1981-01-01

    Twenty-one patients with stage III M/sub 0/ non-oat cell bronchogenic carcinoma confined to the thorax were randomized to receive either intrapleural BCG (10/sup 7/ cfu, Tice strain) or intrapleural saline 3 weeks prior to beginning combined irradiation and chemotherapy. Radiation to the primary tumor and regional nodes was given at a dose of 3,000 rad in ten sessions and was followed in 7-14 days by CAMP chemotherapy (cyclophosphamide, adriamycin, methotrexate, and procarbazine) for a planned duration of 6 months. Isoniazid, 300 mg/day, was given to all patients for 3 months starting 1 week after intrapleural therapy. There were no significant differences in pretreatment prognostic factors or in response to radiation therapy. The patients receiving intrapleural BCG in addition to radiation and chemotherapy had a median survival of 18 weeks, significantly shorter than that for the patients receiving intrapleural saline (54 weeks, P=0.017).

  20. Primary cardiac lymphoma: diagnostic tools and treatment challenges.

    LENUS (Irish Health Repository)

    Bambury, R

    2011-03-01

    Primary cardiac lymphoma (PCL) is a rare malignancy and the optimal treatment strategy remains uncertain. It appears to respond much better to systemic chemotherapy than to surgery and it should be considered in the differential diagnosis of all cardiac tumours before definitive management is undertaken. We report a case of this rare disorder treated successfully with a combination of rituximab and cyclophosphamide, adriamycin, vincristine and prednisolone. The patient developed recurrent unstable ventricular tachycardia (VT) post-chemotherapy secondary to extensive scarring at the tumour site. The tumour as well as the post-treatment scarring is well illustrated by cardiac magnetic resonance imaging highlighting its usefulness in this setting. An implantable cardioverter defibrillator (ICD) was placed. This is only the second case in the literature of PCL to have an ICD placed for recurrent VT. A brief literature review is included.

  1. A case of malignant fibrous histiocytoma following postoperative irradiation for carcinoma of the cervix

    Energy Technology Data Exchange (ETDEWEB)

    Morita, Kenji; Kawashima, Tadahisa; Park, K.R. (Kobe City General Hospital (Japan)) (and others)

    1994-07-01

    We report a case of malignant fibrous histiocytoma (MFH) following carcinoma of the cervix. A 28-year-old female received postoperative radiation of the pelvis, and five years later MFH occurred in the sacral region. After a resection of this tumor, we performed cyclic systemic chemotherapy with cisplatin and adriamycin. The patient is currently doing well. Recently, MFH has been thought to be the most frequent soft tissue tumor in elderly patients, and also occurs frequently as a radiation-induced tumor. Since MFH tends to occur more than ten years after radiation, long-term follow up is important for early detection. We considered that surgical resection was an excellent treatment, while chemotherapy mainly composed of cisplatin was also thought to be effective. (author).

  2. Determination of somatic mutations in human erythrocytes by cytometry

    Energy Technology Data Exchange (ETDEWEB)

    Jensen, R.H.; Langlois, R.G.; Bigbee, W.L.

    1985-06-21

    Flow cytometric assays of human erythrocytes labeled with monoclonal antibodies specific for glycophorin A were used to enumerate variant cells that appear in peripheral blood as a result of somatic gene-loss mutations in erythrocyte precursor cells. The assay was performed on erythrocytes from 10 oncology patients who had received at least one treatment from radiation or mutagenic chemotherapy at least 3 weeks before being assayed. The patients were suffering from many different malignancies (e.g., breast, renal, bone, colon and lung), and were treated with several different mutagenic therapeutics (e.g., cisplatinum, adriamycin, daunomycin, or cyclophosphamide). The frequency of these variant cells is an indication of the amount of mutagenic damage accumulated in the individual's erythropoietic cell population. Comparing these results to HPRT clonogenic assays, we find similar baseline frequencies of somatic mutation as well as similar correlation with mutagenic exposures. 9 refs., 3 figs., 1 tab.

  3. Clinical and experimental studies on effects of chemotherapeutic agents on radiation-induced pulmonary damage

    Energy Technology Data Exchange (ETDEWEB)

    Wadasaki, Kouichi

    1988-12-01

    Clinical and experimental studies were undertaken to evaluate the effects of chemotherapeutic agents on radiation-induced pulmonary damage. In a clinical study, one hundred patients with lung cancer were retrospectively reviewed in terms of the development of radiation pneumonitis. In the patients treated with radiation and chemotherapy except for cisplatinum, radiation pneumonitis occurred more frequently and severely than patients with radiation alone. In an experimental study, male SD rats received 15 Gy radiation to the right lungs with or without injection of chemotherapeutic agents including cisplatinum, adriamycin or peplomycin. Histological changes and hydroxyproline contents of the lungs were evaluated at 2 or 5 months after treatment. Pulmonary damage was severer in rats with radiation and drugs than those with radiation alone. However, rats with cisplatinum had less damage than those with other drugs. In conclusion, radiation-induced pulmonary damage was enhanced by administration of several chemotherapeutic agents. However, cisplatinum seemed to enhance pulmonary damage less than other drugs. (author) 77 refs.

  4. Dactinomycin potentiation of radiation pneumonitis: A forgotten interaction

    Energy Technology Data Exchange (ETDEWEB)

    Cohen, I.J.; Loven, D.; Schoenfeld, T.; Sandbank, J.; Kaplinsky, C.; Yaniv, Y.; Jaber, L.; Zaizov, R. (Sambur Center for Pediatric Hematology/Oncology, Beilinson Medical Center, Petah Tiqva (Israel))

    1991-04-01

    No mention of dactinomycin potentiation of pulmonary radiation was found in a review of the literature of the past 12 years. Before that, this complication was well described and investigators had calculated that dactinomycin increased the toxic effect of lung radiation by a factor of 1.3 and reduced the radiation tolerance of the lung by at least 20%. An example of such a toxic effect is described in the treatment of a 7-year-old girl with lung metastases from Ewing's sarcoma. The chemotherapy protocol followed contained cyclophosphamide, vincristine, dactinomycin, adriamycin, cisplatinum, VP16, and radiotherapy. The treatment was associated with fatal pulmonary fibrosis following the reintroduction of dactinomycin after radiotherapy. The authors experience suggests that there is clinical significance to this complication in sarcoma therapy when dactinomycin-containing protocols are used with radiation in the treatment of pulmonary metastases. 20 references.

  5. Recent results in the treatment of early and late testicular cancer

    Energy Technology Data Exchange (ETDEWEB)

    Seeber, S.; Schuette, J.; Niederle, N.; Schmidt, C.G.

    1983-04-01

    This report summarizes our long-term experience with sequential combination chemotherapy in early and late testicular cancer and presents data from a total of 390 patients treated at the West German Tumor Center Essen between 1973 and 1981. In stage II A (positive retroperitoneal nodes, radically resected) the projected 5-year survival rate is 97%, in stage II B (residual disease after lymphadenectomy), and in stage II C (massive abdominal involvement) the long-term survival was 70% and 30%, respectively. In disseminated disease survival was closely related to the initial tumour burden (> 80% after 5 years for minimal pulmonal disease and < 30% in patients with pulmonal plus massive retroperitoneal involvement). Adriamycin/cisplatinum and belban/bleomycin were equally effective in the total analysis; however, the first combination appeared to be superior in choriocarcinoma, the latter in embryonal carcinoma. An analysis of primary therapeutic failures revealed a low incidence of cross-resistance for the two sequential combinations.

  6. Comparison of the HeLa DNA-synthesis inhibition test and the Ames test for screening of mutagenic carcinogens

    Energy Technology Data Exchange (ETDEWEB)

    Painter, R.B.; Howard, R.

    1978-01-01

    The action of most mutagens is mediated by damage to DNA, which causes at least a temporary inhibition of DNA syntesis in mammalian cells. Assays for mammalian DNA-synthesis inhibition, both in vivo (mouse testes) and in vitro (HeLa cells), have been proposed as possible screening tests for mutagenic carcinogens. The mouse system has recently been chekced with 100 chemicals; of 88 known carcinogens and/or mutagens in this group, 76 were positive. The most generally used non-animal screening procedure is the Ames test, which uses auxotrophic strains of Salmonella typhimurium to measure mutagenesis. In this communication we summarize our results with 19 chemicals tested in HeLa cells and show that they correlate very well with the results obtained in the Ames test. Most of these chemicals act by alkylation, but an intercalator (adriamycin) is included among them as well as aflatoxin B/sub 1/, whose action is not established.

  7. Chronic hematuria and localized bladder damage following combined cyclophosphamide and local radiotherapy

    Energy Technology Data Exchange (ETDEWEB)

    Kende, G.; Wajsman, Z.; Thomas, P.R.M.; Freeman, A.I.

    1979-01-01

    A 13-year-old white male had Ewing sarcoma of the right pubic and ischial bones. Initial therapy consisted of 5400 rads in seven weeks to the right side of the pelvis and 14 intravenous injections of cyclophosphamide (Cytoxan, CTX) at 500 mg/m/sup 2/; BCNU and Adriamycin maintenance therapy continued for a total of two years. He has now been disease-free for five years. Three months following the completion of the right pelvic radiotherapy (RT), while on intravenous CTX, severe hematuria appeared, which subsided, but at present he has continuous microscopic hematuria, as well as periodic episodes of gross hematuria. Serial cystocopies initially revealed thickening and hemorrhagic and edematous changes on the right (irradiated) side of the bladder, and recent multiple telangiectatic patches have been demonstrated as a late healing phase. This case demonstrates the additive toxicity to the bladder of CTX and RT, illustrating that the hemorrhagic cystitis can be extremely protracted lasting five years.

  8. [Initial results of hybrid chemotherapy of Hodgkin's disease using COPP/VBA].

    Science.gov (United States)

    Schneider, T; Molnár, Z; Szántó, I; Fleischmann, T

    1992-10-25

    19 patients with advanced, previously untreated Hodgkin's disease were treated with COPP/ABV (cyclophosphamide, vincristine, procarbasine, prednisolone, adriamycin, bleomycine, vinblastine) hybrid regimen. Complete response was achieved in 8 patients, partial response in 9 patients and primary treatment failure occurred in 2 patients. Two patients received involved field irradiation for the residual disease. 17 months after finishing the therapy one of the complete responders suffered a relapse. Of the 8 partial responders, 5 patients relapsed. 2 relapses occurred during the treatment and 3 relapses were observed in the first 7 months of follow-up. 2 of the partial responders and both nonresponders succumbed to their disease. There were no serious side effects and treatment-related death did not occur.

  9. Endothelial Nitric Oxide Synthase Prevents Heparanase Induction and the Development of Proteinuria.

    Science.gov (United States)

    Garsen, Marjolein; Rops, Angelique L; Li, Jinhua; van Beneden, Katrien; van den Branden, Christiane; Berden, Jo Hm; Rabelink, Ton J; van der Vlag, Johan

    2016-01-01

    Endothelial nitric oxide synthase (eNOS) deficiency exacerbates proteinuria and renal injury in several glomerular diseases, but the underlying mechanism is not fully understood. We recently showed that heparanase is essential for the development of experimental diabetic nephropathy and glomerulonephritis, and hypothesize that heparanase expression is regulated by eNOS. Here, we demonstrate that induction of adriamycin nephropathy (AN) in C57BL/6 eNOS-deficient mice leads to an increased glomerular heparanase expression accompanied with overt proteinuria, which was not observed in the AN-resistant wild type counterpart. In vitro, the eNOS inhibitor asymmetric dimethylarginine (ADMA) induced heparanase expression in cultured mouse glomerular endothelial cells. Moreover, ADMA enhanced transendothelial albumin passage in a heparanase-dependent manner. We conclude that eNOS prevents heparanase induction and the development of proteinuria.

  10. Thiotagetin A, a new cytotoxic thiophene from Tagetes minuta.

    Science.gov (United States)

    Ibrahim, Sabrin R M; Mohamed, Gamal A

    2017-03-01

    Phytochemical investigation of the n-hexane fraction of the methanolic extract of Tagetes minuta L. (Asteraceae) aerial parts afforded a new thiophene derivative: thiotagetin A (3), together with β-sitosterol (1) and stigmasterol (2). The structure of the new thiophene was identified by UV, IR, 1D (1H and 13C), 2D (1H-1H COSY, HSQC and HMBC) NMR and HRESIMS spectral data. Compound 3 displayed cytotoxic activity against KB and MCF7 cancer cell lines with ED50 values of 2.03 and 3.88 μg/mL, respectively, compared to adriamycin (0.26 and 0.07 μg/mL, respectively).

  11. Near Complete Response in a Patient with Classical Hodgkin Lymphoma Treated with Brentuximab Vedotin Concurrent with Radiation Therapy

    Science.gov (United States)

    Montana, Wilbur; Buck, Dennis Andrew; Smith, Tristan

    2017-01-01

    Brentuximab vedotin, an antibody drug conjugate that delivers monomethyl auristatin E into CD-30 expressing cells is FDA approved for the treatment of patients with Hodgkin lymphoma after the failure of autologous stem cell transplantation or at least 2 prior multi-agent chemotherapy regiments. This approval was based on a study that showed an overall response rate of 75% and complete remission in 34%. We present a case of a 24-year-old male with classical nodular sclerosing Hodgkin lymphoma who achieved near complete remission following 5 cycles of brentuximab concurrent with ISRT (involved site radiation therapy) following progression of first-line ABVD (Adriamycin, bleomycin, vinblastine, dacarbazine) and subsequent second-line ICE (ifosfamide, carboplatin, etoposide) chemotherapy. This case not only reiterates the efficacy of brentuximab vedotin in the third-line setting but introduces the role of and need for further clinical trials of combined radiotherapy with brentuximab in Hodgkin lymphoma patients following failure of second-line options.

  12. Inhibitory effect of lichen constituents on mutagenicity induced by heterocyclic amines

    Energy Technology Data Exchange (ETDEWEB)

    Osawa, T.; Kumon, H.; Reece, C.A.; Shibamoto, T. (Univ. of California, Davis (United States))

    1991-01-01

    Physodic acid, one of the main constituents of Hypogymnia enteromorpha, inhibited the mutagenicity of indirect mutagens, including benzo(a)pyrene and heterocyclic amines in Salmonella typhimurium TA 98. In contrast, it was not effective against direct mutagens such as 6-nitropiperonal and adriamycin. Its antimutagenicity was not associated with free-radical scavenging or antioxidative activities. Physodic acid seemed to inhibit the formation of reactive metabolites, such as N-hydroxy-Trp-P-2, by blocking the hepatic microsomal oxidation systems. Another component of H. enteromorpha, physodalic acid, also inhibited mutagenicity of a heterocyclic amine, Trp-P-2, in S. typhimurium TA 98, even though it was reportedly mutagenic in S. typhimurium TA 100.

  13. 31P NMR first spectral moment study of the partial magnetic orientation of phospholipid membranes.

    Science.gov (United States)

    Picard, F; Paquet, M J; Levesque, J; Bélanger, A; Auger, M

    1999-01-01

    Structural data can be obtained on proteins inserted in magnetically oriented phospholipid membranes such as bicelles, which are most often made of a mixture of long and short chain phosphatidylcholine. Possible shapes for these magnetically oriented membranes have been postulated in the literature, such as discoidal structures with a thickness of one bilayer and with the short acyl chain phosphatidylcholine on the edges. In the present paper, a geometrical study of these oriented structures is done to determine the validity of this model. The method used is based on the determination of the first spectral moment of solid-state (31)P nuclear magnetic resonance spectra. From this first moment, an order parameter is defined that allows a quantitative analysis of partially oriented spectra. The validity of this method is demonstrated in the present study for oriented samples made of DMPC, DMPC:DHPC, DMPC:DHPC:gramicidin A and adriamycin:cardiolipin. PMID:10423434

  14. Langerhan’s cell sarcoma: two case reports

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    Tasneem A. Kaleem

    2016-04-01

    Full Text Available Langerhan’s cell sarcoma (LCS is a rare neoplasm with a poor prognosis. To our knowledge, only sixty-six cases have been published. We discuss two patients who presented very differently with LCS, as well as a recently published review of all sixty-six cases. Our first case had a complicated history of metastatic, high-grade myxofibrosarcomas and presented with a single skin lesion of LCS which was treated with resection to a positive margin and adjuvant radiotherapy. The LCS recurred locoregionally and was again resected. The patient is alive two years after initial diagnosis. The second case presented with bone marrow and splenic involvement, leukocytosis, and thrombocytopenia. This patient had an excellent response to etoposide, prednisone, oncovorin, cyclophosphamide, and adriamycin, with normalization of the complete blood count, negative bone marrow biopsy at follow up, and splenectomy without viable neoplasm. This patient is alive without signs of disease at 16 months after initial diagnosis.

  15. [Coma, hyperviscosity syndrome, hyperammonemia and myelofibrosis in a patient with IgG, lambda type multiple myeloma].

    Science.gov (United States)

    Tsunoda, S; Sasaki, R; Miwa, A; Sakurabayashi, I; Miura, Y

    1989-03-01

    A 63-year-old man was admitted to our hospital with tremor and somnolence, followed soon by coma. Anemia and retinal bleeding were observed. The blood smear exhibited rouleaux formation and leukoerythroblastosis. A bone marrow aspiration resulted in dry tap. The biopsy specimens revealed remarkable infiltration of myeloma cells with fibrosis. The M-component of IgG-lambda type and hyper-ammonemia were detected in the serum. Liver and renal functions, however, were within normal range. His consciousness recovered after plasmapheresis. Two courses of VMCP (vincristine, melphalan, carboquone and prednisolone) did not affect the paraproteinemia. Five courses of VAD (vincristine, adriamycin and dexamethasone) could lower the level of IgG. He died of pneumonia. The plasma of some patients with multiple myeloma may contain unidentified factors which increase the plasma ammonia.

  16. Extra osseous osteosarcoma of the retroperitoneum: An unusual entity

    Directory of Open Access Journals (Sweden)

    Ranganath Ratnagiri

    2012-01-01

    Full Text Available Extra-osseous osteosarcomas constitute about 1-1.2% of all osteosarcomas. The most common sites are the extremities, thorax, and the abdomen. Retroperitoneal osteosarcomas are rare and very few cases have been reported. They are similar in their biology to high grade soft tissue sarcomas. R0 resection appears to be the best possible treatment for these tumors. All three variants of conventional osteosarcoma-osteoblastic, chondroblastic, and fibroblastic have been described in these tumors. Chemotherapy has been attempted with adriamycin-based regimens with poor results. Unlike extremity osteosarcomas, these tumors have been found to be chemoresistant. The 5 year survival has ranged from a dismal 12% to about 25%. We report a 46-year-old male who presented with a kidney tumor infiltrating the descending colon, but turned out to be an extra osseous osteosarcoma. An R0 resection was done and adjuvant chemotherapy given.

  17. [Chemoembolization in the treatment of hepatocarcinoma].

    Science.gov (United States)

    Figueras, J; Valls, C; Pamies, J J; Benasco, C; Sancho, C; Rafecas, A; Domínguez, J; Torras, J; Fabregat, J; Baliellas, C

    1993-01-01

    Transcatheter arterial chemoembolization with lipiodol and adriamycin was performed in 46 patients with hepatocellular carcinoma (HCC). In 27, this procedure was followed by selective arterial embolization using gelatin sponge particles. Surgical resection was carried out in 5 cases and 13 patients were transplanted (OLT). The aim of the study was to analyze the survival and degree of tumor necrosis. In the nonsurgical group the overall survival was 67% after 24 months in the OKUDA I stage, 31% after 20 months in the OKUDA II stage and 25% after 6 months in the OKUDA III stage. For the patients who underwent surgery, survival was 38% after 20 months in 5 patients who were resected and 72% after 24 months in 13 patients who were transplanted. Transcatheter arterial chemoembolization improves survival in patients who are not operated on, and can be used as a complementary treatment for patients who undergo surgery. A full tumor necrosis was observed in well encapsulated tumors.

  18. Changing the expression vector of multidrug resistance genes is related to neoadjuvant chemotherapy response.

    Science.gov (United States)

    Litviakov, Nicolay V; Cherdyntseva, Nadezhda V; Tsyganov, Matvey M; Denisov, Evgeny V; Garbukov, Evgeny Y; Merzliakova, Marina K; Volkomorov, Victor V; Vtorushin, Sergey V; Zavyalova, Marina V; Slonimskaya, Elena M; Perelmuter, Vladimir M

    2013-01-01

    We aimed to examine the association between alterations in multidrug resistance (MDR) gene expression, measured before and after neoadjuvant chemotherapy (NAC), and short-term response in a cohort of stage IIA-IIIC breast cancer patients (n = 84). All patients were treated with two to four preoperative cycles of FAC (5-fluorouracil-adriamycin-cyclophosphamide), CAX (cyclophosphamide-adriamycin-xeloda) or taxane regimes. The expression levels of key MDR genes (ABCB1, ABCC1, ABCC2, ABCC3, ABCC5, ABCG1, ABCG2, GSTP1, and MVP) were evaluated in both tumor tissues obtained pre-therapy and in specimens removed by final surgery, using TaqMan-based quantitative reverse transcriptase PCR. No significant difference in the average level of MDR gene expression in paired breast tumors before and after NAC was found when analyzed in both responsive and non-responsive patients. There was no correlation between the expression levels of MDR genes in pre-NAC tumors and immediate NAC response. In the group with tumor responses, we found a statistically significant downregulation of expression of ABCB1, ABCC1, ABCC2, ABCC5, ABCG1, ABCG2, GSTP1, and MVP genes following NAC in FAC and CAX-treated patients (67-93% of cases). In contrast, we found that expression of these genes was upregulated after NAC, mostly in non-responsive patients (55-96% of cases). Responsiveness to taxotere was related to reduced levels of ABCB1, ABCC2, ABCG1, ABCG2, and MVP mRNA in tumor samples collected after chemotherapy. Our results suggest that reductions in MDR gene expression in post-NAC samples in comparison with pre-NAC are associated with tumor response to FAC and CAX as well as taxotere-based NAC, while patients displaying MDR gene upregulation had resistance to therapy.

  19. Pediatric Hodgkin Lymphoma Treated at Cancer Institute, Chennai, India: Long-Term Outcome

    Directory of Open Access Journals (Sweden)

    Venkatraman Radhakrishnan

    2017-10-01

    Full Text Available Purpose: Pediatric Hodgkin lymphoma (HL is a highly curable malignancy. Outcomes for pediatric HL may vary between developed and developing countries for multiple reasons. This study was conducted to ascertain the outcomes of children with HL at our center and to identify risk factors for recurrent disease. Methods: We analyzed the outcomes of 172 consecutive, previously untreated patients with pediatric HL presenting at our center from 2001 to 2010. Patients were treated with either adriamycin, bleomycin, vinblastine, and dacarbazine or adriamycin, bleomycin, vinblastine, cyclophosphamide, vincristine, prednisone, and procarbazine chemotherapy initially, and radiation to bulky sites or a single site of residual disease when appropriate. Results: The median duration of follow-up was 77 months. The median age of the patients was 10 years; 127 (74% of the 172 patients were male. The extent of disease was stage I and II in 59% of the patients. B symptoms were present in 32% of the patients, and 27% had bulky disease. The most common histologic subtype was mixed cellularity (45%. The 5-year overall survival (OS and progression-free survival (PFS of the entire cohort were 92.9% and 83.1%, respectively. The 5-year OS rates for patients with stage I, II, III, and IV were 96%, 94.7%, 84%, and 69.8%, respectively. On univariate analysis, advanced stage, response on interim radiologic assessment, and presence of B symptoms significantly predicted inferior PFS and OS. On multivariate analysis, only interim radiologic response significantly predicted PFS (P < .001 and OS (P < .001. Conclusion: Overall, the outcomes of patients treated at our center are comparable to those observed in other centers in India and globally.

  20. Nephroprotective effect of heparanase in experimental nephrotic syndrome.

    Directory of Open Access Journals (Sweden)

    Suheir Assady

    Full Text Available Heparanase, an endoglycosidase that cleaves heparan sulfate (HS, is involved in various biologic processes. Recently, an association between heparanase and glomerular injury was suggested. The present study examines the involvement of heparanase in the pathogenesis of Adriamycin-induced nephrotic syndrome (ADR-NS in a mouse model.BALB/c wild-type (wt mice and heparanase overexpressing transgenic mice (hpa-TG were tail-vein injected with either Adriamycin (ADR, 10 mg/kg or vehicle. Albuminuria was investigated at days 0, 7, and 14 thereafter. Mice were sacrificed at day 15, and kidneys were harvested for various analyses: structure and ultrastructure alterations, podocyte proteins expression, and heparanase enzymatic activity.ADR-injected wt mice developed severe albuminuria, while ADR-hpa-TG mice showed only a mild elevation in urinary albumin excretion. In parallel, light microscopy of stained cross sections of kidneys from ADR-injected wt mice, but not hpa-TG mice, showed mild to severe glomerular and tubular damage. Western blot and immunofluorescence analyses revealed significant reduction in nephrin and podocin protein expression in ADR-wt mice, but not in ADR-hpa-TG mice. These results were substantiated by electron-microscopy findings showing massive foot process effacement in injected ADR-wt mice, in contrast to largely preserved integrity of podocyte architecture in ADR-hpa-TG mice.Our results suggest that heparanase may play a nephroprotective role in ADR-NS, most likely independently of HS degradation. Moreover, hpa-TG mice comprise an invaluable in vivo platform to investigate the interplay between heparanase and glomerular injury.

  1. Cinnamaldehyde derivative (CB-PIC) sensitizes chemo-resistant cancer cells to drug-induced apoptosis via suppression of MDR1 and its upstream STAT3 and AKT signalling.

    Science.gov (United States)

    Yun, Miyong; Lee, Duckgue; Park, Moon-Nyeo; Kim, Eun-Ok; Sohn, Eun Jung; Kwon, Byung-Mog; Kim, Sung-Hoon

    2015-01-01

    Our group reported that cinnamaldehyde derivative, (E)-4-((2-(3-oxopop-1-enyl)phenoxy)methyl)pyridinium malonic acid (CB-PIC) induced apoptosis in hypoxic SW620 colorectal cancer cells via activation of AMP-activated protein kinase (AMPK) and extracellular signal regulated kinase (ERK). Herein, sensitizing effect of CB-PIC was investigated in resistant cancer cells such as paclitaxel (PT) resistant lung cancer cells (H460/PT), and Adriamycin (Adr) resistant breast cancer (MCF7/Adr) and colon cancer (HCT15/cos) cells. Various drug resistant cell lines were treated with CB-PIC, and the signalling pathway and functional assay were explored by Western blot, Rhodamine assay, FACS, RT-PCR and MTT assay. We found that CB-PIC effectively exerted cytotoxicity, increased sub G1 population and the cleaved form of poly (ADP-ribose) polymerase (PARP) and caspase 9 in drug resistant cancer cells. Furthermore, CB-PIC sensitized resistant cancer cells to adriamycin via downregulation of survival proteins such as survivin, Bcl-xL and Bcl-2, along with MDR1 suppression leading to accumulation of drug in the intracellular region. Of note, CB-PIC transcriptionally decreased MDR1 expression via suppression of STAT3 and AKT signalling in three resistant cancer cells with highly expressed P-glycoprotein. Nonetheless, CB-PIC did not affect transport activity of P-glycoprotein in a short time efflux assay, while epigallocatechin gallate (EGCG) accumulated Rhodamine 123 into intracellular region of cell by direct inhibition of MDR1 transport activity. These data demonstrate that CB-PIC suppresses the P-glycoprotein expression through inhibition of STAT3 and AKT signalling to overcome drug resistance in chemo-resistant cancer cells as a potent chemotherapeutic sensitizer. © 2015 S. Karger AG, Basel.

  2. DNA ploidy and S-phase fraction analysis in peritoneal carcinomatosis from ovarian cancer: correlation with clinical pathological factors and response to chemotherapy.

    Science.gov (United States)

    Carloni, Silvia; Gallerani, Giulia; Tesei, Anna; Scarpi, Emanuela; Verdecchia, Giorgio Maria; Virzì, Salvatore; Fabbri, Francesco; Arienti, Chiara

    2017-01-01

    We investigated the correlation between ploidy or S-phase fraction (SPF) and the clinical pathological characteristics of patients with peritoneal carcinomatosis from ovarian cancer. We also assessed their relation with the in vivo and in vitro response to several chemotherapeutic agents. Fifty-three patients with peritoneal carcinomatosis from ovarian cancer were enrolled. Frozen tumor tissue was dissociated by a detergent-trypsin method, and the resulting cell suspension was stained with RNase A and propidium iodide. Samples were then analyzed for ploidy and SPF by flow cytometry. Fresh tumor tissue was dissociated by enzymatic digestion, and cells were exposed to different concentrations of cisplatin, adriamycin, carboplatin, gemcitabine and taxol for 72 hours. In vitro drug sensitivity was then measured using the sulforhodamine B assay. No significant correlation was found between ploidy or SPF and patient characteristics, even though primary carcinomas were mainly hyperdiploid and more proliferative than recurrent tumors. SPF differed significantly among ploidy categories (P=0.01), and high SPF was associated with short-term survival (P=0.48). Patients with multiploid tumors were the most resistant to platinum-based chemotherapy, whereas those with hyperdiploid tumors were the most responsive. In vitro multiploid tumors were the least sensitive, while hypodiploid samples showed the highest sensitivity to the tested drugs. Sensitivity to adriamycin was significantly correlated with ploidy (P=0.03), whereas sensitivity to taxol was correlated with SPF (P=0.04). Our results indicate that ploidy and SPF could facilitate the choice of therapy for patients with peritoneal carcinomatosis.

  3. Renal tubular epithelial cell apoptosis is associated with caspase cleavage of the NHE1 Na+/H+ exchanger.

    Science.gov (United States)

    Wu, Karen L; Khan, Shenaz; Lakhe-Reddy, Sujata; Wang, Liming; Jarad, George; Miller, R Tyler; Konieczkowski, Martha; Brown, Arthur M; Sedor, John R; Schelling, Jeffrey R

    2003-04-01

    Renal tubular epithelial cell (RTC) apoptosis causes tubular atrophy, a hallmark of renal disease progression. Apoptosis is generally characterized by reduced cell volume and cytosolic pH, but epithelial cells are relatively resistant to shrinkage due to regulatory volume increase, which is mediated by Na(+)/H(+) exchanger (NHE) 1. We investigated whether RTC apoptosis requires caspase cleavage of NHE1. Staurosporine- and hypertonic NaCl-induced RTC apoptosis was associated with cell shrinkage and diminished cytosolic pH, and apoptosis was potentiated by amiloride analogs, suggesting NHE1 activity opposes apoptosis. NHE1-deficient fibroblasts demonstrated increased susceptibility to apoptosis, which was reversed by NHE1 reconstitution. NHE1 expression was markedly decreased in apoptotic RTC due to degradation, and preincubation with peptide caspase antagonists restored NHE1 expression, indicating that NHE1 is degraded by caspases. Recombinant caspase-3 cleaved the in vitro-translated NHE1 cytoplasmic domain into five distinct peptides, identical in molecular weight to NHE1 degradation products derived from staurosporine-stimulated RTC lysates. In vivo, NHE1 loss-of-function C57BL/6.SJL-swe/swe mice with adriamycin-induced nephropathy demonstrated increased RTC apoptosis compared with adriamycin-treated wild-type controls, thereby implicating NHE1 inactivation as a potential mechanism of tubular atrophy. We conclude that NHE1 activity is critical for RTC survival after injury and that caspase cleavage of RTC NHE1 may promote apoptosis and tubular atrophy by preventing compensatory intracellular volume and pH regulation.

  4. Clinical evaluation of multimodal treatment for squamous cell carcinoma of the maxillary sinus

    Energy Technology Data Exchange (ETDEWEB)

    Okawa, Tomohiko; Kita, Midori; Tanaka, Makiko (Tokyo Women' s Medical Coll. (Japan))

    1989-03-01

    Seventy-seven patients with squamous cell carcinoma of the maxillary sinus were treated with radiotherapy and surgery (with or without intra-arterial infusion chemotherapy) from 1969 to 1986 at Tokyo Women's Medical College. The treatment given to the subjects was broadly separated into three categories: Treatment I (1969-1974), Treatment II (1975-1977), and Treatment III (1978-1986). Treatment I consisted of surgery and radiotherapy; Treatment II consisted of multimodal treatment by surgery and radiotherapy with 5-FU intra-arterial infusion chemotherapy (IAIC) from the superficial temporal artery; Treatment III consisted of surgery and radiotherapy with Adriamycin IAIC replacing 5-FU IAIC. Radiotherapy involved a total dose of 60 Gy/6 weeks in Treatment I as the standard, 50 Gy/5 weeks with 5-FU (250 mgx20 times/4 weeks) in Treatment III. Surgery by antrotomy was performed before radiotherapy and IAIC, and Denker's operation was done after radiotherapy with IAIC. The influence of patients' age, sex, T stage and N stage were examined as prognostic factors and no statistically significant differences were seen among each treatment periods. The 2-year control rate was 29% in period I, 27% in period II, and 58% in period III. The 5-year cumulative survival rate was 13% for period I, 40% for period II, and 54% for period III; the incidence of side effects during radiotherapy did not appear to increase, and the severity was at a tolerable level considering the results. However, late complications were seen in 6 cases (cataract, 5; obstinate sinusitis, 1). Thus, the study indicates that multimodal treatment using Adriamycin IAIC can minimize face deformity and allows effective function-saving treatment for carcinoma of the maxillary sinus. (author).

  5. Isolation and characterization of an anthracycline-resistant human leukemic cell line.

    Science.gov (United States)

    Bhalla, K; Hindenburg, A; Taub, R N; Grant, S

    1985-08-01

    An anthracycline-resistant subline of HL-60 promyelocytic leukemia cells (HL-60/AR) has been isolated in vitro by subculturing in progressively higher concentrations of Adriamycin. The resistant cells are capable of sustaining continuous growth in 10(-6) M Adriamycin which is more than 50 times the 50% inhibitory dose for the parent line. HL-60/AR expressed variable degrees of cross-resistance to daunorubicin, dihydroxyanthracenedione, vincristine, vinblastine, and actinomycin D, but it remained sensitive to methotrexate and 1-beta-D-arabinofuranosylcytosine. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis of glycoproteins of HL-60/AR revealed two prominent glycoproteins with molecular weights of 160,000 +/- 10,000 and 110,000 +/- 10,000 which were not detected in the sensitive cells. Cellular uptake and retention of daunorubicin was studied in the resistant and sensitive cells utilizing digitized video fluorescence microscopy. The sensitive cells accumulated more drug and showed at least 2-fold greater levels of brightness than the resistant cells. Studies of total intracellular accumulation, utilizing 10(-6) M [14C]-daunorubicin as a marker, showed a 1-h accumulation of 98 +/- 20 pmol/10(6) cells in HL-60/AR versus 255 +/- 25 pmol/10(6) cells in HL-60. Exposure to nontoxic concentrations of the calcium channel blocker Verapamil (10(-5) M) led to enhanced accumulation (175 +/- 8 pmol/10(6) cells) and retention of the drug in HL-60/AR, resulting in increased cytotoxicity in HL-60/AR. These anthracycline-resistant leukemic cells may serve as a valuable experimental model in studying the phenomenon of multiple drug resistance as well as strategies to circumvent it in human myeloid leukemia.

  6. UCH-L1-containing exosomes mediate chemotherapeutic resistance transfer in breast cancer.

    Science.gov (United States)

    Ning, Kuan; Wang, Teng; Sun, Xu; Zhang, Pengfei; Chen, Yun; Jin, Jian; Hua, Dong

    2017-06-01

    Chemotherapy resistance has become a serious challenge in the treatment of breast cancer. Previous studies showed cells can transfer proteins, including those responsible for drug resistance to adjacent cells via exosomes. The switches of drug resistance via exosomes transfer were assessed by CellTiter-Blue Viability assay, flow cytometry, and immunostaining analysis. Relative protein levels of Ubiquitin carboxyl terminal hydrolase-L1 (UCH-L1), P-glycoprotein (P-gp), extracellular-signal regulated protein kinase1/2 (ERK1/2), and phospho-extracellular-signal regulated protein kinase1/2 (p-ERK1/2) were measured by Western blot. Immunohistochemistry was performed on 93 breast cancer samples to assess the associations of UCH-L1 levels with immunofluorescence value of UCH-L1 in circulating exosomes. The Adriamycin-resistant human breast cancer cells (MCF7/ADM) secreted exosomes carrying UCH-L1 and P-gp proteins into the extracellular microenvironment then integrated into Adriamycin-sensitive human breast cancer cells (MCF7/WT) in a time-dependent manner, transferring the chemoresistance phenotype. Notably, in blood samples from patients with breast cancer, the level of exosomes carrying UCH-L1 before chemotherapy was significantly negatively correlated with prognosis. Our study demonstrated that UCH-L1-containing exosomes can transfer chemoresistance to recipient cells and these exosomes may be useful as non-invasive diagnostic biomarkers for detection of chemoresitance in breast cancer patients, achieving more effective and individualized chemotherapy. © 2017 Wiley Periodicals, Inc.

  7. Modification of initial therapy in early and advanced Hodgkin lymphoma, based on interim PET/CT is beneficial: a prospective multicentre trial of 355 patients.

    Science.gov (United States)

    Dann, Eldad J; Bairey, Osnat; Bar-Shalom, Rachel; Mashiach, Tanya; Barzilai, Elinor; Kornberg, Abraham; Akria, Luiza; Tadmor, Tamar; Filanovsky, Kalman; Abadi, Uri; Kagna, Olga; Ruchlemer, Rosa; Abdah-Bortnyak, Roxolyana; Goldschmidt, Neta; Epelbaum, Ron; Horowitz, Netanel A; Lavie, David; Ben-Yehuda, Dina; Shpilberg, Ofer; Paltiel, Ora

    2017-09-01

    This multicentre study evaluated 5-year progression-free (PFS) and overall survival (OS) in early and advanced Hodgkin lymphoma (HL), where therapy was individualized based on initial prognostic factors and positron emission tomography-computed tomography performed after two cycles (PET-2). Between September 2006 and August 2013, 359 patients aged 18-60 years, were recruited in nine Israeli centres. Early-HL patients initially received ABVD (adriamycin, bleomycin, vinblastine, dacarbazine) ×2. Depending on initial unfavourable prognostic features, PET-2-positive patients received additional ABVD followed by involved-site radiotherapy (ISRT). Patients with negative PET-2 and favourable disease received ISRT or ABVD ×2; those with unfavourable disease received ABVD ×2 with ISRT or, alternatively, ABVD ×4. Advanced-HL patients initially received ABVD ×2 or escalated BEACOPP (bleomycin, etoposide, adriamycin, cyclophosphamide, vincristine, procarbazine, prednisone; EB) ×2 based on their international prognostic score (≤2 or ≥3). PET-2-negative patients further received ABVD ×4; PET-2-positive patients received EB ×4 and ISRT to residual masses. With a median follow-up of 55 (13-119) months, 5-year PFS was 91% and 69% for PET-2-negative and positive early-HL, respectively; 5-year OS was 100% and 95%, respectively. For advanced-HL, the PFS was 81% and 68%, respectively (P = 0·08); 5-year OS was 98% and 91%, respectively. PET-2 positivity is associated with inferior prognosis in early-HL, even with additional ABVD and ISRT. Advanced-HL patients benefit from therapy escalation following positive PET-2. EB can be safely de-escalated to ABVD in PET-2-negative patients. © 2017 John Wiley & Sons Ltd.

  8. Tumor-reactive immune cells protect against metastatic tumor and induce immunoediting of indolent but not quiescent tumor cells.

    Science.gov (United States)

    Payne, Kyle K; Keim, Rebecca C; Graham, Laura; Idowu, Michael O; Wan, Wen; Wang, Xiang-Yang; Toor, Amir A; Bear, Harry D; Manjili, Masoud H

    2016-09-01

    Two major barriers to cancer immunotherapy include tumor-induced immune suppression mediated by myeloid-derived suppressor cells and poor immunogenicity of the tumor-expressing self-antigens. To overcome these barriers, we reprogrammed tumor-immune cell cross-talk by combined use of decitabine and adoptive immunotherapy, containing tumor-sensitized T cells and CD25(+) NKT cells. Decitabine functioned to induce the expression of highly immunogenic cancer testis antigens in the tumor, while also reducing the frequency of myeloid-derived suppressor cells and the presence of CD25(+) NKT cells rendered T cells, resistant to remaining myeloid-derived suppressor cells. This combinatorial therapy significantly prolonged survival of animals bearing metastatic tumor cells. Adoptive immunotherapy also induced tumor immunoediting, resulting in tumor escape and associated disease-related mortality. To identify a tumor target that is incapable of escape from the immune response, we used dormant tumor cells. We used Adriamycin chemotherapy or radiation therapy, which simultaneously induce tumor cell death and tumor dormancy. Resultant dormant cells became refractory to additional doses of Adriamycin or radiation therapy, but they remained sensitive to tumor-reactive immune cells. Importantly, we discovered that dormant tumor cells contained indolent cells that expressed low levels of Ki67 and quiescent cells that were Ki67 negative. Whereas the former were prone to tumor immunoediting and escape, the latter did not demonstrate immunoediting. Our results suggest that immunotherapy could be highly effective against quiescent dormant tumor cells. The challenge is to develop combinatorial therapies that could establish a quiescent type of tumor dormancy, which would be the best target for immunotherapy. © The Author(s).

  9. Topoisomerase 2α and thymidylate synthase expression in adrenocortical cancer.

    Science.gov (United States)

    Roca, Elisa; Berruti, Alfredo; Sbiera, Silviu; Rapa, Ida; Oneda, Ester; Sperone, Paola; Ronchi, Cristina L; Ferrari, Laura; Grisanti, Salvatore; Germano, Antonina; Zaggia, Barbara; Scagliotti, Giorgio Vittorio; Fassnacht, Martin; Volante, Marco; Terzolo, Massimo; Papotti, Mauro

    2017-07-01

    Topoisomerase II alpha (TOP2A) and thymidylate synthase (TS) are known prognostic parameters in several tumors and also predictors of efficacy of anthracyclines, topoisomerase inhibitors and fluoropirimidines, respectively. Expression of TOP2A and TS mRNA was assessed in 98 patients with adrenocortical carcinoma (ACC) and protein expression was assessed by immunohistochemistry in a subset of 39 tumors. Ninety-two patients were radically resected for stage II-III disease and 38 of them received adjuvant mitotane. Twenty-six patients with metastatic disease received the EDP-M (etoposide, doxorubicin, Adriamycin, cisplatin plus mitotane). TOP2A and TS expression in ACC tissue was directly correlated with the clinical data. Both markers were not associated with either disease free survival (DFS) or overall survival (OS) in multivariate analyses and failed to be associated to mitotane efficacy. Disease response or stabilization to EDP-M treatment was observed in 12/17 (71%) and 1/9 (11%) patients with high and low TOP2A expressing tumors (P = 0.0039) and 9/13 (69%) and 4/13 (31%) patients with high and low TS expressing ACC, respectively (P = 0.049). High TOP2A expression was significantly associated with longer time to progression (TTP) after EDP-M. TOP2A and TS proteins assessed by immunohistochemistry significantly correlated with mRNA expression. Immunohistochemical TOP2A expression was associated with a non-significant better response and longer TTP after EDP-M. TOP2A and TS were neither prognostic nor predictive of mitotane efficacy in ACC patients. The predictive role of TOP2A expression of EDP-M activity suggests a significant contribution of Adriamycin and etoposide for the efficacy of the EDP scheme. © 2017 Society for Endocrinology.

  10. Interaction of Mycoplasma hominis PG21 with Human Dendritic Cells: Interleukin-23-Inducing Mycoplasmal Lipoproteins and Inflammasome Activation of the Cell.

    Science.gov (United States)

    Goret, J; Béven, L; Faustin, B; Contin-Bordes, C; Le Roy, C; Claverol, S; Renaudin, H; Bébéar, C; Pereyre, S

    2017-08-01

    Mycoplasma hominis lacks a cell wall, and lipoproteins anchored to the extracellular side of the plasma membrane are in direct contact with the host components. A Triton X-114 extract of M. hominis enriched with lipoproteins was shown to stimulate the production of interleukin-23 (IL-23) by human dendritic cells (hDCs). The inflammasome activation of the host cell has never been reported upon M. hominis infection. We studied here the interaction between M. hominis PG21 and hDCs by analyzing both the inflammation-inducing mycoplasmal lipoproteins and the inflammasome activation of the host cell. IL-23-inducing lipoproteins were determined using a sequential extraction strategy with two nondenaturing detergents, Sarkosyl and Triton X-114, followed by SDS-PAGE separation and mass spectrometry identification. The activation of the hDC inflammasome was assessed using PCR array and enzyme-linked immunosorbent assay (ELISA). We defined a list of 24 lipoproteins that could induce the secretion of IL-23 by hDCs, 5 with a molecular mass between 20 and 35 kDa and 19 with a molecular mass between 40 and 100 kDa. Among them, lipoprotein MHO_4720 was identified as potentially bioactive, and a synthetic lipopeptide corresponding to the N-terminal part of the lipoprotein was subsequently shown to induce IL-23 release by hDCs. Regarding the hDC innate immune response, inflammasome activation with caspase-dependent production of IL-1β was observed. After 24 h of coincubation of hDCs with M. hominis, downregulation of the NLRP3-encoding gene and of the adaptor PYCARD-encoding gene was noticed. Overall, this study provides insight into both protagonists of the interaction of M. hominis and hDCs.IMPORTANCEMycoplasma hominis is a human urogenital pathogen involved in gynecologic and opportunistic infections. M. hominis lacks a cell wall, and its membrane contains many lipoproteins that are anchored to the extracellular side of the plasma membrane. In the present study, we focused on

  11. How does domain replacement affect fibril formation of the rabbit/human prion proteins.

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    Xu Yan

    Full Text Available It is known that in vivo human prion protein (PrP have the tendency to form fibril deposits and are associated with infectious fatal prion diseases, while the rabbit PrP does not readily form fibrils and is unlikely to cause prion diseases. Although we have previously demonstrated that amyloid fibrils formed by the rabbit PrP and the human PrP have different secondary structures and macromolecular crowding has different effects on fibril formation of the rabbit/human PrPs, we do not know which domains of PrPs cause such differences. In this study, we have constructed two PrP chimeras, rabbit chimera and human chimera, and investigated how domain replacement affects fibril formation of the rabbit/human PrPs.As revealed by thioflavin T binding assays and Sarkosyl-soluble SDS-PAGE, the presence of a strong crowding agent dramatically promotes fibril formation of both chimeras. As evidenced by circular dichroism, Fourier transform infrared spectroscopy, and proteinase K digestion assays, amyloid fibrils formed by human chimera have secondary structures and proteinase K-resistant features similar to those formed by the human PrP. However, amyloid fibrils formed by rabbit chimera have proteinase K-resistant features and secondary structures in crowded physiological environments different from those formed by the rabbit PrP, and secondary structures in dilute solutions similar to the rabbit PrP. The results from transmission electron microscopy show that macromolecular crowding caused human chimera but not rabbit chimera to form short fibrils and non-fibrillar particles.We demonstrate for the first time that the domains beyond PrP-H2H3 (β-strand 1, α-helix 1, and β-strand 2 have a remarkable effect on fibrillization of the rabbit PrP but almost no effect on the human PrP. Our findings can help to explain why amyloid fibrils formed by the rabbit PrP and the human PrP have different secondary structures and why macromolecular crowding has different

  12. Protein disulfide isomerase interacts with tau protein and inhibits its fibrillization.

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    Li-Rong Xu

    Full Text Available BACKGROUND: Tau protein is implicated in the pathogenesis of neurodegenerative disorders such as tauopathies including Alzheimer disease, and Tau fibrillization is thought to be related to neuronal toxicity. Physiological inhibitors of Tau fibrillization hold promise for developing new strategies for treatment of Alzheimer disease. Because protein disulfide isomerase (PDI is both an enzyme and a chaperone, and implicated in neuroprotection against Alzheimer disease, we want to know whether PDI can prevent Tau fibrillization. In this study, we have investigated the interaction between PDI and Tau protein and the effect of PDI on Tau fibrillization. METHODOLOGY/PRINCIPAL FINDINGS: As evidenced by co-immunoprecipitation and confocal laser scanning microscopy, human PDI interacts and co-locates with some endogenous human Tau on the endoplasmic reticulum of undifferentiated SH-SY5Y neuroblastoma cells. The results from isothermal titration calorimetry show that one full-length human PDI binds to one full-length human Tau (or human Tau fragment Tau244-372 monomer with moderate, micromolar affinity at physiological pH and near physiological ionic strength. As revealed by thioflavin T binding assays, Sarkosyl-insoluble SDS-PAGE, and transmission electron microscopy, full-length human PDI remarkably inhibits both steps of nucleation and elongation of Tau244-372 fibrillization in a concentration-dependent manner. Furthermore, we find that two molecules of the a-domain of human PDI interact with one Tau244-372 molecule with sub-micromolar affinity, and inhibit both steps of nucleation and elongation of Tau244-372 fibrillization more strongly than full-length human PDI. CONCLUSIONS/SIGNIFICANCE: We demonstrate for the first time that human PDI binds to Tau protein mainly through its thioredoxin-like catalytic domain a, forming a 1∶1 complex and preventing Tau misfolding. Our findings suggest that PDI could act as a physiological inhibitor of Tau

  13. An ultrasensitive electrochemical DNA biosensor based on a copper oxide nanowires/single-walled carbon nanotubes nanocomposite

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    Chen, Mei [Key Laboratory of Biorheology Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044 (China); Hou, Changjun, E-mail: houcj@cqu.edu.cn [Key Laboratory of Biorheology Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044 (China); National Key Laboratory of Fundamental Science of Micro/Nano-Device and System Technology, Chongqing University, Chongqing 400044 (China); Huo, Danqun [Key Laboratory of Biorheology Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044 (China); National Key Laboratory of Fundamental Science of Micro/Nano-Device and System Technology, Chongqing University, Chongqing 400044 (China); Yang, Mei [Key Laboratory of Biorheology Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044 (China); Fa, Huanbao [College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044 (China)

    2016-02-28

    Graphical abstract: A novel and sensitive electrochemical biosensor based on hybrid nanocomposite consisting of copper oxide nanowires (CuO NWs) and carboxyl-functionalized single-walled carbon nanotubes (SWCNTs-COOH) was first developed for the detection of the specific-sequence target DNA. This schematic represents the fabrication procedure of our DNA biosensor. - Highlights: • An ultrasensitive DNA electrochemical biosensor was developed. • CuO NWs entangled with the SWCNTs formed a mesh structure with good conductivity. • It is the first time use of CuONWs-SWCNTs hybrid nanocomposite for DNA detection. • The biosensor is simple, selective, stable, and sensitive. • The biosensor has great potential for use in analysis of real samples. - Abstract: Here, we developed a novel and sensitive electrochemical biosensor to detect specific-sequence target DNA. The biosensor was based on a hybrid nanocomposite consisting of copper oxide nanowires (CuO NWs) and carboxyl-functionalized single-walled carbon nanotubes (SWCNTs-COOH). The resulting CuO NWs/SWCNTs layers exhibited a good differential pulse voltammetry (DPV) current response for the target DNA sequences, which we attributed to the properties of CuO NWs and SWCNTs. CuO NWs and SWCNTs hybrid composites with highly conductive and biocompatible nanostructure were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and cyclic voltammetry (CV). Immobilization of the probe DNA on the electrode surface was largely improved due to the unique synergetic effect of CuO NWs and SWCNTs. DPV was applied to monitor the DNA hybridization event, using adriamycin as an electrochemical indicator. Under optimal conditions, the peak currents of adriamycin were linear with the logarithm of target DNA concentrations (ranging from 1.0 × 10{sup −14} to 1.0 × 10{sup −8} M), with a detection limit of 3.5 × 10{sup −15} M (signal/noise ratio of 3). The biosensor also showed high

  14. Anticancer efficacy and absorption, distribution, metabolism, and toxicity studies of Aspergiolide A in early drug development

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    Wang Y

    2014-10-01

    Full Text Available Yuanyuan Wang, Xin Qi, Dehai Li, Tianjiao Zhu, Xiaomei Mo, Jing LiKey Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, People's Republic of ChinaAbstract: Since the first anthracycline was discovered, many other related compounds have been studied in order to overcome its defects and improve efficacy. In the present paper, we investigated the anticancer effects of a new anthracycline, aspergiolide A (ASP-A, from a marine-derived fungus in vitro and in vivo, and we evaluated the absorption, distribution, metabolism, and toxicity drug properties in early drug development. We found that ASP-A had activity against topoisomerase II that was comparable to adriamycin. ASP-A decreased the growth of various human cancer cells in vitro and induced apoptosis in BEL-7402 cells via a caspase-dependent pathway. The anticancer efficacy of ASP-A on the growth of hepatocellular carcinoma xenografts was further assessed in vivo. Results showed that, compared with the vehicle group, ASP-A exhibited significant anticancer activity with less loss of body weight. A pharmacokinetics and tissue distribution study revealed that ASP-A was rapidly cleared in a first order reaction kinetics manner, and was enriched in cancer tissue. The maximal tolerable dose (MTD of ASP-A was more than 400 mg/kg, and ASP-A was not considered to be potentially genotoxic or cardiotoxic, as no significant increase of micronucleus rates or inhibition of the hERG channel was seen. Finally, an uptake and transport assay of ASP-A was performed in monolayers of Caco-2 cells, and ASP-A was shown to be absorbed through the active transport pathway. Altogether, these results indicate that ASP-A has anticancer activity targeting topoisomerase II, with a similar structure and mechanism to adriamycin, but with much lower toxicity. Nonetheless, further molecular structure optimization is necessary.Keywords: aspergiolide A, anticancer

  15. Importance of glutathione and associated enzymes in drug response.

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    Shen, H; Kauvar, L; Tew, K D

    1997-01-01

    Maintenance of cellular homeostasis is a critical survival trait in tumors when exposed to anticancer drugs. Because conjugation and elimination of drugs and their metabolites is dependent upon sequential and coordinated pathways, acquired drug resistance through a gradual adaptive response would rarely be expected to be the consequence of changes in the expression of one gene product. We have used a number of drug-resistant human cell lines to characterize those genes that are implicated in maintaining a resistant phenotype. Human HT29 colon cancer cells chronically exposed to ethacrynic acid (EA) [a glutathione (GSH) and glutathione S-transferase (GST) modulator] have acquired resistance to the drug. Commensurate with resistance, EA is more effectively conjugated to GSH and effluxed from the resistant cells. Using directed and random (differential display) approaches, a number of detoxification and/or protective gene products have been shown to be expressed at elevated levels. These include: gamma-glutamyl cysteine synthetase (gamma-GCS, the rate-limiting enzyme in GSH biosynthesis); GST pi (the enzyme catalyzing the conjugation reaction); multidrug resistance associated protein (MRP) (the membrane pump responsible for effluxing the conjugate from the cell interior). In addition, other gene products not directly linked with EA metabolism were induced, including dihydrodiol dehydrogenase (an alpha-ketoreductase) (30-fold), DT-diaphorase (threefold), and a transcriptional regulator SSP 3521 (threefold). HL60 cells resistant to a GSH paralog Ter199 also show increased expression of some of these gene products. Furthermore, an adriamycin-resistant human HL60 cell line also shows overexpression of GST pi, gamma-GCS, and MRP, but in addition has approximately 20-fold more DNA-dependent protein kinase catalytic subunit (DNA-PKcs). This enzyme is an early stress response gene that can phosphorylate and activate downstream transcription factors. Such overexpression could

  16. SKP2 siRNA inhibits the degradation of P27kip1 and down-regulates the expression of MRP in HL-60/A cells.

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    Xiao, Jie; Yin, Songmei; Li, Yiqing; Xie, Shuangfeng; Nie, Danian; Ma, Liping; Wang, Xiuju; Wu, Yudan; Feng, Jianhong

    2009-08-01

    S-phase kinase-associated protein 2 (SKP2) gene is a tumor suppressor gene, and is involved in the ubiquitin-mediated degradation of P27kip1. SKP2 and P27kip1 affect the proceeding and prognosis of leukemia through regulating the proliferation, apoptosis and differentiation of leukemia cells. In this study, we explored the mechanism of reversing of HL-60/A drug resistance through SKP2 down-regulation. HL-60/A cells were nucleofected by Amaxa Nucleofector System with SKP2 siRNA. The gene and protein expression levels of Skp2, P27kip1, and multi-drug resistance associated protein (MRP) were determined by reverse transcription-polymerase chain reaction and western blot analysis, respectively. The cell cycle was analyzed by flow cytometry. The 50% inhibitory concentration value was calculated using cytotoxic analysis according to the death rate of these two kinds of cells under different concentrations of chemotherapeutics to compare the sensitivity of the cells. HL-60/A cells showed multi-drug resistance phenotype characteristic by cross-resistance to adriamycin, daunorubicin, and arabinosylcytosine, due to the expression of MRP. We found that the expression of SKP2 was higher in HL-60/A cells than in HL-60 cells, but the expression of P27kip1 was lower. The expression of SKP2 in HL-60/A cells nucleofected by SKP2 siRNA was down-regulated whereas the protein level of P27kip1 was up-regulated. Compared with the MRP expression level in the control group (nucleofected by control siRNA), the mRNA and protein expression levels of MRP in HL-60/A cells nucleofected by SKP2 siRNA were lower, and the latter cells were more sensitive to adriamycin, daunorubicin, and arabinosylcytosine. Down-regulating the SKP2 expression and arresting cells in the G0/G1 phase improve drug sensitivity of leukemia cells with down-regulated MRP expression.

  17. Assessment of pulmonary toxicities in breast cancer patients undergoing treatment with anthracycline and taxane based chemotherapy and radiotherapy- a prospective study

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    Aramita Saha

    2013-12-01

    Full Text Available Background: Anthracycline based regiments and/or taxanes and adjuvant radiotherapy; the main modalities of treatment for breast cancers are associated with deterioration of pulmonary functions and progressive pulmonary toxicities. Aim: Assessment of pulmonary toxicities and impact on pulmonary functions mainly in terms of decline of forced vital capacity (FVC and the ratio of forced expiratory volume (FEV in 1 Second and FEV1/FVC ratio with different treatment times and follow ups in carcinoma breast patients receiving anthracycline and/or taxane based chemotherapy and radiotherapy. Materials and methods: A prospective single institutional cohort study was performed with 58 breast cancer patients between January 2011 to July 2012 who received either anthracycline based (37 patients received 6 cycles FAC= 5 FU, Adriamycin, Cyclophosphamide regime and radiotherapy or anthracycline and taxane based chemotherapy (21 patients received 4cycles AC= Adriamycin, Cyclophosphamide; followed by 4 cycles of T=Taxane and radiotherapy. Assessment of pulmonary symptoms and signs, chest x-ray and pulmonary function tests were performed at baseline, midcycle, at end of chemotherapy, at end radiotherapy, at 1 and 6 months follow ups and compared. By means of a two-way analysis of variance (ANOVA model, the course of lung parameters across the time points was compared. Results and Conclusion: Analysis of mean forced vital capacities at different points of study times showed definitive declining pattern, which is at statistically significant level at the end of 6th month of follow up (p=0.032 .The FEV1/FVC ratio (in percentage also revealed a definite decreasing pattern over different treatment times and at statistically significant level at 6th month follow up with p value 0.003. Separate analysis of mean FEV1/FVC ratios over time in anthracycline based chemotherapy and radiotherapy group as well as anthracycline and taxane based chemotherapy and radiotherapy group

  18. [Establishment and characterization of human ovarian fibrosarcoma cell line and its sensitivity to anticancer agents].

    Science.gov (United States)

    Kiyozuka, Y; Nishimura, H; Iwanaga, S; Yakushiji, M; Ito, K; Nakano, S; Tamori, N; Adachi, S; Noda, T; Imai, S

    1992-04-01

    We succeeded in establishing a cell line (KEN-3) for subculture from a fibrosarcoma which originated in the ovary in a girl aged 17 years. Its characteristics and sensitivity to anticancer agents are reported in this paper. 1. Characteristics of established cell line. Lined cells consist of multinucleated giant cells mixed among many spindle-shaped cells. They grow in small colonies and have none of the pavement-like arrangement characteristic of epithelial tumor cells. The number of chromosomes ranged from 45 to 128 (mode: pseudo-triploidy region, 65). The doubling time, cellular density and plating efficiency were 76.9 hours, 5.4 x 10(5)/cm2 and 30.2%, respectively. Concerning tumor markers, CEA and sialyl SSEA-1 were only produced in small quantities. Subculture was possible subcutaneously in the nude mouse with no capacity for the production of ascites. 2. Susceptibility to anticancer agents and GP170 expression. The in vitro susceptibility to about 12 types of anticancer agents was investigated with the MTT assay. IC50/PPC was shown to be less than 1 for Adriamycin only. The sensitivity to CDDP (IC50/PPC: 4.8) was low, and no sensitivity was observed at all to DTIC, which is used frequently for mesenchymal tumors. GP170 (mdr-1 products) was positive in established cells in immunohistochemical stain.

  19. TAK1 inhibitor NG25 enhances doxorubicin-mediated apoptosis in breast cancer cells.

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    Wang, Zhenyu; Zhang, Huiyuan; Shi, Minghao; Yu, Yang; Wang, Hao; Cao, Wen-Ming; Zhao, Yanling; Zhang, Hong

    2016-09-07

    Doxorubicin (Dox, Adriamycin) has been widely used in breast cancer treatment. But its severe cardio-toxic side effects limited the clinical use. Dox treatment can induce DNA damage and other accompanying effects in cancer cells, and subsequently activates nuclear factor κB (NF-κB) pathway which has a strong pro-survival role in different types of malignancy. We hypothesize that blocking NF-κB pathway may sensitize breast cancer cells to Dox chemotherapy. TGFβ-activated kinase-1 (TAK1) is a key intracellular molecule participating in genotoxic stresses-induced NF-κB activation. Targeting TAK1 as a strategy to enhance cancer treatment efficacy has been studied in several malignancies. We showed that NG25, a synthesized TAK1 inhibitor, greatly enhanced Dox treatment efficacy in a panel of breast cancer cell lines. In this pre-clinical study, we found that NG25 partially blocked Dox-induced p38 phosphorylation and IκBα degradation and enhanced Dox-induced cytotoxic effects and apoptosis in all breast cancer cell lines tested. Taken together, we provided clear evidence that NG25 sensitizes the breast cancer cells to Dox treatment in vitro. This combination may be an effective and feasible therapeutic option maximizing Dox efficacy and meanwhile minimizing Dox side effects in treating breast cancer.

  20. Chemotherapy for osteosarcoma - where does it come from? What is it? Where is it going?

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    Yamamoto, Norio; Tsuchiya, Hiroyuki

    2013-11-01

    Although chemotherapy is currently indispensable for the treatment of osteosarcoma, chemotherapy for this rare cancer has not been developed based on multicentre randomised prospective trials with many subjects. The therapeutic outcomes of chemotherapy have been improved in large part through the efforts and innovation of physicians who treated patients with osteosarcoma and conducted detailed examinations of a small number of subjects. It is important to understand how chemotherapy for osteosarcoma has changed to achieve further development. This article discusses the changes in chemotherapy for osteosarcoma, including adjuvant and neoadjuvant chemotherapy, and focuses on four key anticancer drugs: methotrexate, adriamycin, cisplatin, and ifosfamide. This article also discusses the problems of research on osteosarcoma treatment, from the perspective of osteosarcoma as a rare disease, and the challenges to be addressed. Approximately 30 years have passed since the key anticancer drugs were introduced. The development of new therapeutic drugs for osteosarcoma has stagnated. Given that osteosarcoma is a rare cancer, it would be difficult to expect that drug development will be led by pharmaceutical companies. Thus, it is very important to create a system for more efficient drug development based on innovations from various academic and medical institutions.

  1. A target based approach identifies genomic predictors of breast cancer patient response to chemotherapy

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    Hallett Robin M

    2012-05-01

    Full Text Available Abstract Background The efficacy of chemotherapy regimens in breast cancer patients is variable and unpredictable. Whether individual patients either achieve long-term remission or suffer recurrence after therapy may be dictated by intrinsic properties of their breast tumors including genetic lesions and consequent aberrant transcriptional programs. Global gene expression profiling provides a powerful tool to identify such tumor-intrinsic transcriptional programs, whose analyses provide insight into the underlying biology of individual patient tumors. For example, multi-gene expression signatures have been identified that can predict the likelihood of disease reccurrence, and thus guide patient prognosis. Whereas such prognostic signatures are being introduced in the clinical setting, similar signatures that predict sensitivity or resistance to chemotherapy are not currently clinically available. Methods We used gene expression profiling to identify genes that were co-expressed with genes whose transcripts encode the protein targets of commonly used chemotherapeutic agents. Results Here, we present target based expression indices that predict breast tumor response to anthracycline and taxane based chemotherapy. Indeed, these signatures were independently predictive of chemotherapy response after adjusting for standard clinic-pathological variables such as age, grade, and estrogen receptor status in a cohort of 488 breast cancer patients treated with adriamycin and taxotere/taxol. Conclusions Importantly, our findings suggest the practicality of developing target based indices that predict response to therapeutics, as well as highlight the possibility of using gene signatures to guide the use of chemotherapy during treatment of breast cancer patients.

  2. Proteinuria Impairs Podocyte Regeneration by Sequestering Retinoic Acid

    Science.gov (United States)

    Peired, Anna; Angelotti, Maria Lucia; Ronconi, Elisa; la Marca, Giancarlo; Mazzinghi, Benedetta; Sisti, Alessandro; Lombardi, Duccio; Giocaliere, Elisa; Della Bona, Marialuisa; Villanelli, Fabio; Parente, Eliana; Ballerini, Lara; Sagrinati, Costanza; Wanner, Nicola; Huber, Tobias B.; Liapis, Helen; Lazzeri, Elena; Lasagni, Laura

    2013-01-01

    In CKD, the risk of kidney failure and death depends on the severity of proteinuria, which correlates with the extent of podocyte loss and glomerular scarring. We investigated whether proteinuria contributes directly to progressive glomerulosclerosis through the suppression of podocyte regeneration and found that individual components of proteinuria exert distinct effects on renal progenitor survival and differentiation toward a podocyte lineage. In particular, albumin prevented podocyte differentiation from human renal progenitors in vitro by sequestering retinoic acid, thus impairing retinoic acid response element (RARE)-mediated transcription of podocyte-specific genes. In mice with Adriamycin nephropathy, a model of human FSGS, blocking endogenous retinoic acid synthesis increased proteinuria and exacerbated glomerulosclerosis. This effect was related to a reduction in podocyte number, as validated through genetic podocyte labeling in NPHS2.Cre;mT/mG transgenic mice. In RARE-lacZ transgenic mice, albuminuria reduced retinoic acid bioavailability and impaired RARE activation in renal progenitors, inhibiting their differentiation into podocytes. Treatment with retinoic acid restored RARE activity and induced the expression of podocyte markers in renal progenitors, decreasing proteinuria and increasing podocyte number, as demonstrated in serial biopsy specimens. These results suggest that albumin loss through the damaged filtration barrier impairs podocyte regeneration by sequestering retinoic acid and promotes the generation of FSGS lesions. Our findings may explain why reducing proteinuria delays CKD progression and provide a biologic rationale for the clinical use of pharmacologic modulators to induce regression of glomerular diseases. PMID:23949798

  3. In Silico Screening, Synthesis and In Vitro Evaluation of Some Quinazolinone and Pyridine Derivatives as Dihydrofolate Reductase Inhibitors for Anticancer Activity

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    A. G. Nerkar

    2009-01-01

    Full Text Available Dihydrofolate reductase (DHFR is the important target for anticancer drugs belonging to the class of antimetabolites as the enzyme plays important role in the de novo purine synthesis. We here report the in silico screening to obtain best fit molecules as DHFR inhibitors, synthesis of some ʻbest fitʼ quinazolinone from 2-phenyl-3-(substituted-benzilidine-amino quinazolinones (Quinazolinone Shiff's bases QSB1-5 and pyridine-4-carbohydrazide Shiff's bases (ISB1-5 derivatives and their in vitro anticancer assay. Synthesis of the molecules was performed using microwave assisted synthesis. The structures of these molecules were elucidated by IR and 1H-NMR. These compounds were then subjected for in vitro anticancer evaluation against five human cancer cell-lines for anticancer cyto-toxicity assay. Methotrexate (MTX was used as standard for this evaluation to give a comparable inhibition of the cell proliferation by DHFR inhibition. Placlitaxel, adriamycin and 5-fluoro-uracil were also used as standard to give a comparable activity of these compounds with other mechanism of anticancer activity. ISB3 (4-(N, N-dimethyl-amino-phenyl Schiff''s base derivative of pyridine carbohydrazide showed equipotent activity with the standards used in in vitro anticancer assay as per the NCI (National Cancer Institute guidelines.

  4. Antitumour potential of a polysaccharide-rich substance from the fruit juice of Morinda citrifolia (Noni) on sarcoma 180 ascites tumour in mice.

    Science.gov (United States)

    Furusawa, Eiichi; Hirazumi, Anne; Story, Stephen; Jensen, Jarakae

    2003-12-01

    An immunomodulatory polysaccharide-rich substance (Noni-ppt) from the fruit juice of Morinda citrifolia has been found to possess both prophylactic and therapeutic potentials against the immunomodulator sensitive Sarcoma 180 tumour system. The antitumour activity of Noni-ppt produced a cure rate of 25%-45% in allogeneic mice and its activity was completely abolished by the concomitant administration of specific inhibitors of macrophages (2-chloroadenosine), T cells (cyclosporine) or natural killer (NK) cells (anti-asialo GM1 antibody). Noni-ppt showed synergistic or additive beneficial effects when combined with a broad spectrum of chemotherapeutic drugs, including cisplatin, adriamycin, mitomycin-C, bleomycin, etoposide, 5- fl uorouracil, vincristine or camptothecin. It was not beneficial when combined with paclitaxel, cytosine arabinoside, or immunosuppressive anticancer drugs such as cyclophosphamide, methotrexate or 6-thioguanine. Noni-ppt also demonstrated beneficial effects when combined with the Th1 cytokine, interferon gamma, but its activity was abolished when combined with Th2 cytokines, interleukin-4 or interleukin-10, thereby suggesting that Noni-ppt induces a Th1 dominant immune status in vivo. The combination of Noni-ppt with imexon, a synthetic immunomodulator, also demonstrated beneficial effects, but not when combined with the MVE-2 copolymer, a high molecular weight immunomodulator. It was also not effective when combined with interleukin-2 or interleukin-12. Copyright 2003 John Wiley & Sons, Ltd.

  5. Emotional suppression tendencies as predictors of symptoms, mood, and coping appraisals during AC chemotherapy for breast cancer treatment.

    Science.gov (United States)

    Schlatter, Melanie C; Cameron, Linda D

    2010-08-01

    Tendencies to suppress negative emotions have been shown to predict adjustment to cancer and cancer progression. We examined whether emotional suppression, in terms of both general and emotion-specific tendencies, predict symptom reports, mood states, and coping appraisals during adriamycin/doxorubicin, cyclophosphamide/cytoxan chemotherapy for breast cancer. Forty participants completed a measure yielding scores for anxiety suppression, anger suppression, depression suppression, and total emotional suppression. They then reported their experiences of 34 physical symptoms, mood, and coping efficacy on a daily basis for the duration of treatment (84 days). Mixed model analyses revealed that emotional suppression predicted lower reports of symptoms that are vague, well-known, and potentially embarrassing side effects of chemotherapy (e.g., fatigue and constipation). Emotional suppression and particularly anger suppression predicted higher reports of symptoms relating to immune function and cardiovascular arousal (e.g., mouth sores and heart palpitations) and with appraisals of poorer coping. The three suppression tendencies exhibited distinctive patterns of relationships with symptoms, mood, and coping appraisals, suggesting that anxiety suppression, anger suppression, and depression suppression have partially independent relationships with symptomatic and mood processes. The findings highlight the potential importance of emotional suppression for understanding symptom and coping responses during chemotherapy.

  6. Preformulation Studies on Piperlongumine.

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    Alhassan Aodah

    Full Text Available Piperlongumine is a natural alkaloid extracted from piper plants which has been used traditionally for the treatment of certain diseases. This compound shows interesting in vitro pharmacological activity such as selective anticancer activity and higher cytotoxicity than methotrexate, cyclophosphamide and adriamycin on breast, colon, and osteosarcoma cancers, respectively. However, the physicochemical properties for this compound have not been well characterized. In this research, preformulation studies for piperlongumine have been performed to determine factors which influence solubility and stability which, in turn, can be used to assist future formulation development. The solubility of piperlongumine in water was found to be approximately 26 μg/ml. Using 10% polysorbate 80 as a surfactant resulted in a 27 fold increase in solubility. Cosolvents and cyclodextrins afforded concentrations of 1 mg/ml and higher. The pH degradation rate profile for piperlongumine at various temperatures shows significant instability of the drug at pH values ≥ 7 and 3, and maximum stability around pH 4. It was estimated that it would take approximately 17 weeks for piperlongumine to degrade by 10% at 25°C, pH 4. Additionally, piperlongumine showed marked photo-degradation upon exposure to an ultraviolet light source, especially in aqueous media.

  7. Rituximab plus Ifosfamide, Carboplatin and Etoposide for T-Cell/Histiocyte-Rich B-Cell Lymphoma Arising in Nodular Lymphocyte-Predominant Hodgkin’s Lymphoma

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    Hyung-Chul Park

    2012-08-01

    Full Text Available A small subset of patients with nodular lymphocyte-predominant Hodgkin’s lymphoma (NLPHLs develop a non-Hodgkin lymphoma either concurrently or subsequently, usuallyT-cell/histiocyte-rich B-cell lymphomas (T/HRBCL, which are subtypes of diffuse large B-cell lymphomas (DLBCL. The standard treatment of DLBCL patients is rituximab-based chemotherapy with cyclophosphamide, adriamycin, vincristine and prednisolone. However, the administration of this chemotherapy regimen to patients with DLBCL arising in NLPHL brings concern about the cardiac toxicity of anthracycline because the majority of these patients had already received anthracycline-based chemotherapy with doxorubicin, bleomycin, vinblastine and dacarbazine at the time of NLPHL. Herein, we report 2 patients with sequential transformation of NLPHL to T/HRBCL. They initially presented with limited-stage NLPHL and subsequently developed T/HRBCL after 16 and 8 months, respectively. At the time of T/HRBCL, they were treated with rituximab, ifosfamide, carboplatin and etoposide, and complete responses were obtained.

  8. DNA damage induced by cis- and carboplatin as indicator for in vitro sensitivity of ovarian carcinoma cells

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    de Wilde Rudy L

    2009-10-01

    Full Text Available Abstract Background The DNA damage by platinum cytostatics is thought to be the main cause of their cytotoxicity. Therefore the measurement of the DNA damage induced by cis- and carboplatin should reflect the sensitivity of cancer cells toward the platinum chemotherapeutics. Methods DNA damage induced by cis- and carboplatin in primary cells of ovarian carcinomas was determined by the alkaline comet assay. In parallel, the reduction of cell viability was measured by the fluorescein diacetate (FDA hydrolysis assay. Results While in the comet assay the isolated cells showed a high degree of DNA damage after a 24 h treatment, cell viability revealed no cytotoxicity after that incubation time. The individual sensitivities to DNA damage of 12 tumour biopsies differed up to a factor of about 3. DNA damage after a one day treatment with cis- or carboplatin correlated well with the cytotoxic effects after a 7 day treatment (r = 0,942 for cisplatin r = 0.971 for carboplatin. In contrast to the platinum compounds the correlation of DNA damage and cytotoxicity induced by adriamycin was low (r = 0,692, or did not exist for gemcitabine. Conclusion The measurement of DNA damage induced by cis- and carboplatin is an accurate method to determine the in vitro chemosensitivity of ovarian cancer cells towards these cytostatics, because of its quickness, sensitivity, and low cell number needed.

  9. Does injection of metanephric mesenchymal cells improve renal function in rats?

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    Yu-qing Jiao

    2011-01-01

    Full Text Available Chronic kidney disease (CKD is a massive global health-care problem. Cell therapy offers a potential treatment for CKD. The aim of this study was to investigate whether the administration of a population of stem cells could be used to treat adriamycin (ADR-induced glomerulopathy in rats, a form of CKD. We intravenously transplanted metanephric mesenchymal cells (MMCs into rats treated with ADR. We also induced MMC differentiation in vitro using a medium derived from serum and homogenates of ADR-induced glomerulopathy rats. We detected the induction of an early epithelial phenotype (cytokeratin-18 expression and a proximal tubule phenotype (vitamin D receptor expression in vitro, and MMC-derived epithelial cells corresponding to the proximal tubule and glomeruli in vivo. Transplantation of MMCs after induction of glomerulopathy significantly increased the creatinine clearance rate (Ccr, a marker for glomerular filtration rate, but had no significant effect on other parameters (24-hour urinary protein excretion, serum albumin, total cholesterol. In addition, there was no significant difference in blood urea nitrogen or serum creatinine levels in rats with and without ADR administration. Our results indicate that MMCs might survive, engraft and differentiate into renal epithelia in vivo when transplanted into ADR-treated rats. However, further studies are needed to determine whether MMC transplantation improves renal function and causes renal repair in this model.

  10. Clinical effects of cepharanthin (Ceph.) on leukopenia by chemotherapy in lung cancer patients.

    Science.gov (United States)

    Saito, R; Tsuchiya, S; Ishizuka, T; Fueki, N; Ezawa, K; Minato, K; Nakano, H; Takise, A; Kurihara, M; Fueki, R

    1989-12-20

    In order to examine the clinical efficacy of cepharanthin (Ceph.) for preventing leukopenia caused by chemotherapy in lung cancer patients, a randomized trial was carried out. Subjects were 45 patients with non-small cell lung cancer (NSCLC) receiving initial treatment with cisplatin (CDDP) +adriamycin (ADM) +mitomycin C (MMC). Ceph. was given at a dose of 1 mg/kg to the administration group (Ceph. group) and changes in the peripheral leukocyte count were examined in both the Ceph. and non-Ceph. groups. The Ceph. group showed a reduction in the number of cases with a count nadir less than 3,000/microliters (p less than 0.05), a shortening of the time that leukocyte counts stayed under 2,000/microliters, corresponding to the time in which granulocyte counts were less than 500/microliters (p less than 0.05), and also a reduction of the time for leukocyte counts to recover from nadir to 2,000 or 3,000/microliters (p less than 0.05) measured from the commencement of chemotherapy. These results suggest that administration of Ceph. has an antileukopenic effect in anticancer treatment, and makes it possible to reduce the period of risk for infection, allowing effective regimens to be administered repeatedly in shorter intervals.

  11. A Case of Paratesticular Leiomyosarcoma Successfully Treated with Orchiectomy and Chemotherapy

    Science.gov (United States)

    Ko, Bong Suk; Kim, Nae Yu; Ryu, Ah Jung; Kim, Dong Soon; Gong, Soo Jung; Kim, Dae Kyung; Son, Hyun Jin

    2012-01-01

    A 50-year-old male patient presented with a right scrotal mass that had been growing rapidly for more than one year. A heterogeneous enhancing right scrotal mass (12×9 cm) with para-aortic and peri-caval lymphadenopathies was found on abdominal computed tomography (CT). Right orchiectomy was performed and the gross finding had shown intact testis with a well-defined, huge, whitish solid mass adjacent to the testis. According to pathology, the mass was characterized as a leiomyosarcoma, grade 3 (by National Cancer Instituted [NCI] system). Therefore, the diagnosis was stage III, grade 3 paratesticular leiomyosarcoma. The patient underwent additional systemic chemotherapy using ifosfamide and adriamycin. After nine cycles of chemotherapy, positron emission tomography-CT was performed and no FDP uptake was observed. The patient has been followed up for 12 months after systemic chemotherapy, and he has maintained a complete response. We report here on a rare case of paratesticular leiomyosarcoma treated successfully with orichiectomy and additional systemic chemotherapy. PMID:23091448

  12. CD68+ cell count, early evaluation with PET and plasma TARC levels predict response in Hodgkin lymphoma.

    Science.gov (United States)

    Cuccaro, Annarosa; Annunziata, Salvatore; Cupelli, Elisa; Martini, Maurizio; Calcagni, Maria L; Rufini, Vittoria; Giachelia, Manuela; Bartolomei, Francesca; Galli, Eugenio; D'Alò, Francesco; Voso, Maria T; Leone, Giuseppe; Giordano, Alessandro; Larocca, Luigi M; Hohaus, Stefan

    2016-03-01

    Early response evaluation with [(18) F]fluordeoxyglucose (FDG) positron emission tomography after 2 cycles of chemotherapy (interim PET) has been indicated as the strongest predictor for outcome in classical Hodgkin lymphoma (HL). We studied the prognostic role of the number of tumor-infiltrating CD68+ cells and of the plasma levels of TARC (thymus and activation-regulated chemokine) in the context of interim PET in 102 patients with classical HL treated with Adriamycin, Bleomycin, Vinblastine, Dacarbazine (ABVD). After 2 ABVD cycles, interim PET according to Deauville criteria was negative (score 0-3) in 85 patients and positive (score 4-5) in 15 patients (2 patients technically not evaluable). TARC levels were elevated in 89% of patients at diagnosis, and decreased after 2 cycles in 82% of patients. Persistently elevated TARC levels in 18% of patients were significantly associated with a positive PET result (P = 0.007). Strong predictors for progression-free survival (PFS) were a negative interim PET (85% vs. 28%, P evaluation had no prognostic role. In multivariate analysis, interim PET, CD68+ cell counts and presence of B-symptoms were independently associated with PFS. We conclude that although TARC levels are a biomarker for early response evaluation, they cannot substitute for interim PET as outcome predictor in HL. The evaluation of CD68 counts and B-symptoms at diagnosis may help to identify low-risk patients regardless positive interim PET. © 2016 The Authors. Cancer Medicine published by John Wiley & Sons Ltd.

  13. Neoadjuvant chemotherapy and adjuvant chemotherapy in radiotherapy for locally advanced cervical carcinoma IIIb; Randomized study

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    Hamada, Katsuyuki; Kihana, Toshimasa; Hori, Reiko; Matsuura, Shumpei; Kawamura, Masashi; Kataoka, Masaaki (Ehime Univ., Shigenobu (Japan). School of Medicine)

    1993-09-01

    Fifty-eight untreated patients with locally advanced cervical carcinoma (International Federation of Gynecology and Obstetrics [FIGO] Stage IIIb) were enrolled in this study to evaluate the efficacy of a neoadjuvant chemotherapy consisting of 3 cycles of cisplatin, adriamycin, mitomycin and pepleomycin. A radiotherapy alone group (RT group) consisted of 45 patients, a neoadjuvant chemotherapy followed by second-line radiotherapy group (CR group) consisted of 8 patients and a first-line radiotherapy followed by second-line chemotherapy group (CR group) consisted of 5 patients. Twenty-five percent of the CR group achieved a complete tumor response (CTR) and 75% of the CR group achieved a partial tumor response (PTR). In the RC group, 87.5% of the patients achieved a CTR and 12.5% of the patients achieved a PTR. Three- and five-year survival rates were 71.1% and 62.2% in the RT group, 100% and 100% in the CR group, and 60% and 20% in the RC group (p<0.05), respectively. The incidence of complications by radiotherapy was 37.7% in the RT group and 15.4% in the combination group (CR and RC group). Our results suggest that neoadjuvant chemotherapy followed by radiotherapy is most effective for the treatment of cervical carcinoma IIIb as compared with radiotherapy alone or with first-line radiotherapy followed by second-line chemotherapy. (author).

  14. [Antitumor effects of matrix protein of vesicular stomatic virus on EL4 lymphoma mice].

    Science.gov (United States)

    Lin, Shi-jia; Yu, Qin-mei; Meng, Wen-tong; Wen, Yan-jun; Chen, Li-juan; Niu, Ting

    2011-03-01

    To explore antitumor effects of plasmid pcDNA3. 1-MP encoding matrix protein of vesicular stomatitis virus (VSV) complexed with cationic liposome (DOTAP:CHOL) in mice with EL4 lymphoma. C57BL/6 mouse model with EL4 lymphoma was established. Sixty mice bearing EL4 lymphoma were divided randomly into five groups including Lip-MP, Lip-pVAX, Lip, ADM and NS groups, which were intravenously injected with liposome-pcDNA 3. 1-MP complex, liposome-pVAX complex, empty liposome, Adriamycin and normal saline respectively every three days. Tumor volumes and survival time were monitored. Microvessel density and tumor proliferative index in tumor tissues were determined by CD31, Ki-67 immunohistochemistry staining, meanwhile the tumor apoptosis index was measured by TUNEL method. From 6 days after treatments on, the tumor volume in Lip-MP group was much smaller than that in Lip-pVAX, Lip and NS group (P EL4 tumor cells in vivo (P EL4 lymphoma, which may be related to the induction of tumor cell apoptosis, inhibition of tumor angiogenesis, and suppression of tumor cell proliferation.

  15. Synthesis, spectroscopic, anticancer, antibacterial and antifungal studies of Ni(II) and Cu(II) complexes with hydrazine carboxamide, 2-[3-methyl-2-thienyl methylene

    Science.gov (United States)

    Chandra, Sulekh; Vandana; Kumar, Suresh

    2015-01-01

    Schiff's base ligand(L) hydrazine carboxamide, 2-[3-methyl-2-thienyl methylene] and its metal complexes have been synthesized and characterized by elemental analysis, molar conductance, various spectroscopic techniques such as electronic, IR, 1H NMR, mass, EPR. Molar conductance of complexes in DMF solution corresponds to non-electrolyte. Complexes have general composition [M(L)2X2], where M = Ni(II) and Cu(II), X = Cl-, NO3-, CH3COO- and ½SO42-. On the basis of above spectral studies, an octahedral geometry has been assigned for Ni(II) complexes and tetragonal geometry for Cu(II) complexes except [Cu(L)2SO4] which possesses five coordinated trigonal bipyramidal geometry. These metal complexes were also tested for their anticancer, antibacterial and antifungal activities to assess their inhibition potential. Anticancer activity of ligand and its metal complexes were evaluated using SRB fluorometric assay and Adriamycin (ADR) was applied as positive control. Schiff's base ligand and its metal complexes were screened for their antibacterial and antifungal activity against Escherichia coli, Bacillus cereus and Aspergillus niger, Aspergillus flavus, respectively. Kirby-Bauer single disk susceptibility test was used for antibacterial activity and well diffusion method for antifungal activity of the compounds on the used fungi.

  16. Phenylarsine Oxide Can Induce the Arsenite-Resistance Mutant PML Protein Solubility Changes

    Directory of Open Access Journals (Sweden)

    Yu Han Jiang

    2017-01-01

    Full Text Available Arsenic trioxide (As2O3 has recently become one of the most effective drugs for treatment of patient with acute promyelocytic leukemia (APL, and its molecular mechanism has also been largely investigated. However, it has been reported that As2O3 resistant patients are frequently found in relapsed APL after consolidation therapy, which is due to the point mutations in B-box type 2 motifs of promyelocytic leukemia (PML gene. In the present study, we for the first time establish whether organic arsenic species phenylarsine oxide (PAO could induce the mutant PML-IV (A216V protein solubility changes and degradation. Here, three different PML protein variants (i.e., PML-IV, PML-V and mutant PML-A216V were overexpressed in HEK293T cells and then exposed to PAO in time- and dose-dependent manners. Interestingly, PAO is found to have potential effect on induction of mutant PML-IV (A216V protein solubility changes and degradation, but no appreciable effects were found following exposure to high concentrations of iAsIII, dimethylarsinous acid (DMAIII and adriamycin (doxorubicin, even though they cause cell death. Our current data strongly indicate that PAO has good effects on the mutant PML protein solubility changes, and it may be helpful for improving the therapeutic strategies for arsenic-resistant APL treatments in the near future.

  17. Nuclear c-Abl-mediated tyrosine phosphorylation induces chromatin structural changes through histone modifications that include H4K16 hypoacetylation

    Energy Technology Data Exchange (ETDEWEB)

    Aoyama, Kazumasa; Fukumoto, Yasunori; Ishibashi, Kenichi; Kubota, Sho; Morinaga, Takao; Horiike, Yasuyoshi; Yuki, Ryuzaburo; Takahashi, Akinori; Nakayama, Yuji; Yamaguchi, Naoto, E-mail: nyama@p.chiba-u.ac.jp

    2011-12-10

    c-Abl tyrosine kinase, which is ubiquitously expressed, has three nuclear localization signals and one nuclear export signal and can shuttle between the nucleus and the cytoplasm. c-Abl plays important roles in cell proliferation, adhesion, migration, and apoptosis. Recently, we developed a pixel imaging method for quantitating the level of chromatin structural changes and showed that nuclear Src-family tyrosine kinases are involved in chromatin structural changes upon growth factor stimulation. Using this method, we show here that nuclear c-Abl induces chromatin structural changes in a manner dependent on the tyrosine kinase activity. Expression of nuclear-targeted c-Abl drastically increases the levels of chromatin structural changes, compared with that of c-Abl. Intriguingly, nuclear-targeted c-Abl induces heterochromatic profiles of histone methylation and acetylation, including hypoacetylation of histone H4 acetylated on lysine 16 (H4K16Ac). The level of heterochromatic histone modifications correlates with that of chromatin structural changes. Adriamycin-induced DNA damage stimulates translocation of c-Abl into the nucleus and induces chromatin structural changes together with H4K16 hypoacetylation. Treatment with trichostatin A, a histone deacetylase inhibitor, blocks chromatin structural changes but not nuclear tyrosine phosphorylation by c-Abl. These results suggest that nuclear c-Abl plays an important role in chromatin dynamics through nuclear tyrosine phosphorylation-induced heterochromatic histone modifications.

  18. Design, synthesis and evaluation of novel triazole core based P-glycoprotein-mediated multidrug resistance reversal agents.

    Science.gov (United States)

    Jiao, Lei; Qiu, Qianqian; Liu, Baomin; Zhao, Tianxiao; Huang, Wenlong; Qian, Hai

    2014-12-15

    A novel series of triazol-N-ethyl-tetrahydroisoquinoline based compounds were designed and synthesized via click chemistry. Most of the synthesized compounds showed P-glycoprotein (P-gp)-mediated multidrug resistance (MDR) reversal activities. Among them, compound 7 with little cytotoxicity towards GES-1 cells (IC50 >80μM) and K562/A02 cells (IC50 >80μM) exhibited more potency than verapamil (VRP) on increasing anticancer drug accumulation in K562/A02 cells. Moreover, compound 7 could significantly reverse MDR in a dose-dependent manner and also persist longer chemo-sensitizing effect than VRP with reversibility. Further mechanism studies revealed that compound 7 in reversing MDR revealed that it could remarkably increase the intracellular accumulation of both rhodamine-123 (Rh123) and adriamycin (ADM) in K562/A02 cells as well as inhibit their efflux from the cells. These results suggested that compound 7 showed more potency than the classical P-gp inhibitor VRP under the same conditions, which may be a promising P-gp-mediated MDR modulator for further development. Copyright © 2014 Elsevier Ltd. All rights reserved.

  19. Hemangiopericytoma of the spleen.

    Science.gov (United States)

    Illuminati, Giulio; Pizzardi, Giulia; Calio, Francesco; Pacilè, Maria A; Carboni, Fabio; Palumbo, Piergaspare; Vietri, Francesco

    2015-03-01

    Hemangiopericytoma of the spleen is a very rare tumor, with 14 isolated reports. It was our aim to review our experience and compare it with all the reported cases in an attempt to standardize surgical treatment, adjuvant treatment and follow-up protocol of this infrequent condition. A consecutive case series study, with a mean follow-up of 44 months. Five patients (mean age, 49 years) underwent simple splenectomy for hemangiopericytoma limited to the spleen followed by adriamycin-based chemotherapy in one patient. All the patients are alive and free from disease. For tumors confined to the spleen, simple splenectomy can be considered curative, without any need for further adjuvant treatment. On review of the medical literature, cure can still be achieved with complete resection of recurrences, when feasible, with adjuvant chemotherapy being also indicated. The slow-growing pattern of the tumor suggests a 10-year follow-up. Copyright © 2015 Surgical Associates Ltd. Published by Elsevier Ltd. All rights reserved.

  20. Early diagnosis of recurrent diffuse large B-cell lymphoma showing intravascular lymphoma by random skin biopsy.

    Science.gov (United States)

    Kasuya, Akira; Hashizume, Hideo; Takigawa, Masahiro

    2011-06-01

    A 66-year-old man was admitted to our hospital presenting 2 weeks' history of fever of unknown origin with elevated levels of lactate dehydrogenase and C-reactive protein. Six years before this episode, he had developed diffuse large B-cell lymphoma, which had been successfully treated with chemoradiation. While recurrence of diffuse large B-cell lymphoma was suspected, there was neither lymphadenopathy nor tumor formation by the imaging study. Random biopsy from normal-appearing abdominal skin showed extensive infiltration of CD20(+), CD79a(+), CD3(-) atypical lymphoid cells in the lumen of vessels in subcutaneous tissues. These findings led us to the diagnosis of intravascular B-cell lymphoma. Following rituximab plus cyclophosphamide, adriamycin, vincristine and prednisolone therapy, high fever subsided, and lactate dehydrogenase and C-reactive protein levels returned to the normal range. In conclusion, random skin biopsy is useful for the early diagnosis of intravascular B-cell lymphoma. © 2010 Japanese Dermatological Association.

  1. La Autoantigen Induces Ribosome Binding Protein 1 (RRBP1 Expression through Internal Ribosome Entry Site (IRES-Mediated Translation during Cellular Stress Condition

    Directory of Open Access Journals (Sweden)

    Wenqing Gao

    2016-07-01

    Full Text Available The function of ribosome binding protein 1 (RRBP1 is regulating the transportation and secretion of some intracellular proteins in mammalian cells. Transcription of RRBP1 is induced by various cytokines. However, few studies focused on the process of RRPB1 mRNA translation. The RRBP1 mRNA has a long 5′ untranslated region that potentially formed a stable secondary structure. In this study, we show that the 5′ UTR of RRBP1 mRNA contains an internal ribosome entry site (IRES. Moreover, the RRBP1 expression is induced by chemotherapeutic drug paclitaxel or adriamycin in human hepatocellular carcinoma cells and accompanied with the increased expression of La autoantigen (La, which binds to RRBP1 IRES element and facilitates translation initiation. Interestingly, we found IRES-mediated RRBP1 translation is also activated during serum-starvation condition which can induce cytoplasmic localization of La. After mapping the entire RRBP1 5′ UTR, we determine the core IRES activity is located between nt-237 and -58. Furthermore, two apical GARR loops within the functional RRBP1 IRES elements may be important for La binding. These results strongly suggest an important role for IRES-dependent translation of RRBP1 mRNA in hepatocellular carcinoma cells during cellular stress conditions.

  2. Primary Synovial Sarcoma of Kidney: A Rare Differential Diagnosis of Renomegaly

    Directory of Open Access Journals (Sweden)

    Gaurang Modi

    2014-01-01

    Full Text Available Synovial sarcomas (SS are classified as subgroup of soft tissue sarcomas affecting mainly extremities of young adults. Primary SS of kidney are very rare tumours with poor prognosis. Though they have characteristic histology and immunohistochemistry (IHC due to rarity of incidence it is difficult to diagnose them. Sometimes chromosomal rearrangement studies are required to confirm the diagnosis. We are presenting a case of 41-year-old male who was referred to our cancer centre for evaluation of left renal mass. CT scan of abdomen revealed a large left renal mass encasing the aorta. Biopsy of renal mass revealed poorly differentiated sarcoma and IHC was positive for vimentin, CD99, and BCL2 and negative for AE1, epithelial membrane antigen, and leukocyte common antigen. The patient was clinically inoperable as renal mass was encasing the aorta. So he was subsequently offered palliative chemotherapy in form of ifosfamide and adriamycin. CT abdomen shows partial response after 3 cycles of chemotherapy according to RECIST criteria.

  3. Multiwavelength videomicrofluorimetric method for a preliminary, fast, and inexpensive screening of the cytoxic properties of new drugs: application to some new marine peptides

    Science.gov (United States)

    Viallet, Pierre M.; Rocchi, Emmanuelle; Vigo, Jean; Salmon, Jean-Marie

    1999-07-01

    The discovery of new families of active drugs isolated from natural sources is an appealing avenue to avoid the MDR consequences in cancer treatment. Unfortunately the procedures of isolation and purification of these compounds are generally complex and time-consuming so that only tiny amounts of the new drugs are available for the preliminary biological tests. As a consequence there is a need for reliable, quantitative methods, more informative than the conventional cytotoxicity curve on the potential intracellular targets, and for which only tiny amounts of drugs are necessary. We have recently developed a method of screening based on a triple labeling process of single living cells in culture, involving the simultaneous use of Hoechst 33342 for nuclear staining. Rhodamine 123 for mitochondrial staining and Nile Red for cell delineation. Numerical image analysis was used to study both the dose- effect and the time-effect of well-known cytotoxic drugs such adriamycin, allowing to select the more informative biochemical parameters. The use of this method has recently been extended to new marine peptides such as didemnin B and some laxaphycins.

  4. Cytotoxicity of the Essential Oil of Fennel (Foeniculum vulgare) from Tajikistan.

    Science.gov (United States)

    Sharopov, Farukh; Valiev, Abdujabbor; Satyal, Prabodh; Gulmurodov, Isomiddin; Yusufi, Salomudin; Setzer, William N; Wink, Michael

    2017-08-28

    The essential oil of fennel (Foeniculum vulgare) is rich in lipophilic secondary metabolites, which can easily cross cell membranes by free diffusion. Several constituents of the oil carry reactive carbonyl groups in their ring structures. Carbonyl groups can react with amino groups of amino acid residues in proteins or in nucleotides of DNA to form Schiff's bases. Fennel essential oil is rich in anise aldehyde, which should interfere with molecular targets in cells. The aim of the present study was to investigate the chemical composition of the essential oil of fennel growing in Tajikistan. Gas chromatographic-mass spectrometric analysis revealed that the main components of F. vulgare oil were trans-anethole (36.8%); α-ethyl-p-methoxy-benzyl alcohol (9.1%); p-anisaldehyde (7.7%); carvone (4.9%); 1-phenyl-penta-2,4-diyne (4.8%) and fenchyl butanoate (4.2%). The oil exhibited moderate antioxidant activities. The potential cytotoxic activity was studied against HeLa (human cervical cancer), Caco-2 (human colorectal adenocarcinoma), MCF-7 (human breast adenocarcinoma), CCRF-CEM (human T lymphoblast leukaemia) and CEM/ADR5000 (adriamycin resistant leukaemia) cancer cell lines; IC50 values were between 30-210 mg L-1 and thus exhibited low cytotoxicity as compared to cytotoxic reference compounds.

  5. Bosutinib as a fourth-line therapy for a patient with T315I-positive lymphoid blastic phase chronic myeloid leukemia: A case report.

    Science.gov (United States)

    Komeno, Yukiko; Uchida, Naoyuki; Satoh, Yumiko; Uryu, Hideki; Iwata, Yuko; Masuda, Akiko; Iihara, Kuniko; Yatomi, Yutaka; Taniguchi, Shuichi; Ryu, Tomiko

    2017-06-01

    A 35-year-old male was diagnosed with chronic myeloid leukemia in the chronic phase and was prescribed 100 mg daily dasatinib. However, dasatinib was discontinued due to thrombocytopenia, and within six months, the disease progressed to the lymphoid blastic phase. Hyper-cyclophosphamide, vincristine, adriamycin and dexamethasone chemotherapy combined with 140 mg dasatinib or 600 mg imatinib was prescribed. The two inhibitors were soon discontinued due to severe thrombocytopenia and jaundice, respectively. Myelosuppression persisted subsequent to the nadir. Bone marrow (BM) aspiration and biopsy revealed hypercellular marrow filled with blasts. Sequencing of the leukemia cells revealed overlapping peaks for the wild-type sequence and the T315I mutant sequence. The patient was treated with 500 mg bosutinib (which was later reduced to 300 mg) for pretransplant cytoreduction. After 5 months, the patient's spleen exhibited a reduction in volume and the percentage of blasts in the BM decreased from 96.1 to 17.5%. The patient successfully underwent cord blood transplantation. The patient has been disease-free for 5 months subsequent to transplantation. This case suggests that bosutinib may be effective for cytoreduction prior to stem cell transplantation, unless the leukemia cells consistently harbor the T315I mutation.

  6. Effect of gemcitabine chemotherapy on immune function and VEGF in patients with middle and advanced liver cancer

    Directory of Open Access Journals (Sweden)

    Ling Zuo

    2016-09-01

    Full Text Available Objective: To observe the effect of gemcitabine chemotherapy on the immune function and VEGF in patients with middle and advanced liver cancer. Methods: A total of 90 patients with middle and advanced liver cancer who were admitted in our hospital from June, 2014 to July, 2015 were included in the study and randomized into the observation group and the control group with 45 cases in each group. The patients in the control group were given adriamycin, and the patients in the observation group were given gemcitabine chemotherapy. The efficacy, immunological function indicators, VEGF level, and the occurrence of adverse reactions in the two groups were compared. Results: IL-6 and TNF-毩 levels after treatment in the two groups were significantly elevated, and the increased degree in the observation group was significantly greater than that in the control group (P0.05. VEGF level after treatment in the two groups was significantly reduced, and the reduced degree in the observation group was significantly greater than that in the control group (P<0.05. The improvement of T cell subsets after treatment in the observation group was significantly superior to that in the control group (P<0.05. The occurrence rate of adverse reactions in the observation group was significantly lower than that in the control group (P<0.05. Conclusions: Gemcitabine chemotherapy on patients with middle and advanced liver cancer can effectively improve the immunological function, and enhance the efficacy, with a higher safety.

  7. [Drug resistance and its mechanism of intrinsic drug-resistant cell line GRC-1].

    Science.gov (United States)

    Kong, X; Ding, Y; Xia, T

    1997-11-01

    In order to probe the characteristics of drug resistance and its mechanisms of renal cell carcinoma, drug-resistant spectrum of renal cell carcinoma cell line GRC-1 was detected by in vitro MTT colorimetric assay, the mechanism of drug resistance in GRC-1 was also studied by the methods of both immunocytochemistry assay and flow fluorescence cytometry. The results demonstrated that GRC-1 was cross-resistant to adriamycin, vincrinstine, etoposide and carboplatinium, both mdr1 gene product P-glycoprotein and GST-pi which was an isozyme of glutathione S-transferases were expressed in GRC-1. The accumulation of net intracellular drugs of GRC-1 was less than that of drug sensitive breast cancer cell line MCF7, and the ability of pumping drugs out of cells was higher than that of MCF7. The results suggested that there is an intrinsic multidrug resistance in GRC-1 cell line, and both P-glycoprotein and glutathione systems play a role in the development of drug resistance for GRC-1. GRC-1 is an ideal target cell line for the study of drug resistance.

  8. Involved Node Radiation Therapy: An Effective Alternative in Early-Stage Hodgkin Lymphoma

    Energy Technology Data Exchange (ETDEWEB)

    Maraldo, Maja V., E-mail: dra.maraldo@gmail.com [Department of Radiation Oncology, The Finsen Center, Rigshospitalet, Copenhagen (Denmark); Aznar, Marianne C. [Department of Radiation Oncology, The Finsen Center, Rigshospitalet, Copenhagen (Denmark); Faculty of Health Sciences, University of Copenhagen, Copenhagen (Denmark); Vogelius, Ivan R.; Petersen, Peter M. [Department of Radiation Oncology, The Finsen Center, Rigshospitalet, Copenhagen (Denmark); Specht, Lena [Department of Radiation Oncology, The Finsen Center, Rigshospitalet, Copenhagen (Denmark); Faculty of Health Sciences, University of Copenhagen, Copenhagen (Denmark)

    2013-03-15

    Purpose: The involved node radiation therapy (INRT) strategy was introduced for patients with Hodgkin lymphoma (HL) to reduce the risk of late effects. With INRT, only the originally involved lymph nodes are irradiated. We present treatment outcome in a retrospective analysis using this strategy in a cohort of 97 clinical stage I-II HL patients. Methods and Materials: Patients were staged with positron emission tomography/computed tomography scans, treated with adriamycin, bleomycin, vinblastine, and dacarbazine chemotherapy, and given INRT (prechemotherapy involved nodes to 30 Gy, residual masses to 36 Gy). Patients attended regular follow-up visits until 5 years after therapy. Results: The 4-year freedom from disease progression was 96.4% (95% confidence interval: 92.4%-100.4%), median follow-up of 50 months (range: 4-71 months). Three relapses occurred: 2 within the previous radiation field, and 1 in a previously uninvolved region. The 4-year overall survival was 94% (95% confidence interval: 88.8%-99.1%), median follow-up of 58 months (range: 4-91 months). Early radiation therapy toxicity was limited to grade 1 (23.4%) and grade 2 (13.8%). During follow-up, 8 patients died, none from HL, 7 malignancies were diagnosed, and 5 patients developed heart disease. Conclusions: INRT offers excellent tumor control and represents an effective alternative to more extended radiation therapy in the combined modality treatment for early-stage HL.

  9. Changes in the expression of miR-381 and miR-495 are inversely associated with the expression of the MDR1 gene and development of multi-drug resistance.

    Directory of Open Access Journals (Sweden)

    Yan Xu

    Full Text Available Multidrug resistance (MDR frequently develops in cancer patients exposed to chemotherapeutic agents and is usually brought about by over-expression of P-glycoprotein (P-gp which acts as a drug efflux pump to reduce the intracellular concentration of the drug(s. Thus, inhibiting P-gp expression might assist in overcoming MDR in cancer chemotherapy. MiRNAome profiling using next-generation sequencing identified differentially expressed microRNAs (miRs between parental K562 cells and MDR K562 cells (K562/ADM induced by adriamycin treatment. Two miRs, miR-381 and miR-495, that were strongly down-regulated in K562/ADM cells, are validated to target the 3'-UTR of the MDR1 gene. These miRs are located within a miR cluster located at chromosome region 14q32.31, and all miRs in this cluster appear to be down-regulated in K562/ADM cells. Functional analysis indicated that restoring expression of miR-381 or miR-495 in K562/ADM cells was correlated with reduced expression of the MDR1 gene and its protein product, P-gp, and increased drug uptake by the cells. Thus, we have demonstrated that changing the levels of certain miR species modulates the MDR phenotype in leukemia cells, and propose further exploration of the use of miR-based therapies to overcome MDR.

  10. A Novel Strategy for Inducing the Antitumor Effects of Triterpenoid Compounds: Blocking the Protumoral Functions of Tumor-Associated Macrophages via STAT3 Inhibition

    Directory of Open Access Journals (Sweden)

    Yukio Fujiwara

    2014-01-01

    Full Text Available There are many types of nontumor cells, including leukocytes, fibroblasts, and endothelial cells, in the tumor microenvironment. Among these cells, infiltrating macrophages have recently received attention as novel target cells due to their protumoral functions. Infiltrating macrophages are called tumor-associated macrophages (TAMs. TAMs polarized to the M2 phenotype are involved in tumor development and are associated with a poor clinical prognosis. Therefore, the regulation of TAM activation or M2 polarization is a new strategy for antitumor therapy. We screened natural compounds possessing an inhibitory effect on the M2 polarization of human macrophages. Among 200 purified natural compounds examined, corosolic acid (CA and oleanolic acid (OA, both are categorized in triterpenoid compounds, inhibited macrophage polarization to M2 phenotype by suppressing STAT3 activation. CA and OA also directly inhibited tumor cell proliferation and sensitized tumor cells to anticancer drugs, such as adriamycin and cisplatin. The in vivo experiments showed that CA significantly suppressed subcutaneous tumor development and lung metastasis in a murine sarcoma model. The application of triterpenoid compounds, such as CA and OA, is a potential new anticancer therapy targeting macrophage activation, with synergistic effects with anticancer agents.

  11. Mature induced-pluripotent-stem-cell-derived human podocytes reconstitute kidney glomerular-capillary-wall function on a chip

    Science.gov (United States)

    Musah, Samira; Mammoto, Akiko; Ferrante, Thomas C.; Jeanty, Sauveur S. F.; Hirano-Kobayashi, Mariko; Mammoto, Tadanori; Roberts, Kristen; Chung, Seyoon; Novak, Richard; Ingram, Miles; Fatanat-Didar, Tohid; Koshy, Sandeep; Weaver, James C.; Church, George M.; Ingber, Donald E.

    2017-01-01

    An in vitro model of the human kidney glomerulus — the major site of blood filtration — could facilitate drug discovery and illuminate kidney-disease mechanisms. Microfluidic organ-on-a-chip technology has been used to model the human proximal tubule, yet a kidney-glomerulus-on-a-chip has not been possible because of the lack of functional human podocytes — the cells that regulate selective permeability in the glomerulus. Here, we demonstrate an efficient (> 90%) and chemically defined method for directing the differentiation of human induced pluripotent stem (hiPS) cells into podocytes that express markers of the mature phenotype (nephrin+, WT1+, podocin+, Pax2−) and that exhibit primary and secondary foot processes. We also show that the hiPS-cell-derived podocytes produce glomerular basement-membrane collagen and recapitulate the natural tissue/tissue interface of the glomerulus, as well as the differential clearance of albumin and inulin, when co-cultured with human glomerular endothelial cells in an organ-on-a-chip microfluidic device. The glomerulus-on-a-chip also mimics adriamycin-induced albuminuria and podocyte injury. This in vitro model of human glomerular function with mature human podocytes may facilitate drug development and personalized-medicine applications. PMID:29038743

  12. Spirocercosis-associated esophageal sarcomas in dogs. A retrospective study of 17 cases (1997-2003).

    Science.gov (United States)

    Ranen, Eyal; Lavy, Eran; Aizenberg, Izhac; Perl, Shmuel; Harrus, Shimon

    2004-01-30

    Seventeen client-owned dogs diagnosed with spirocercosis-associated esophageal sarcomas were retrospectively reviewed. The most common clinical signs noticed were vomiting and/or regurgitation (94%), lethargy and depression (59%), pyrexia and anorexia (41% each). Leukocytosis (82%) and microcytic hypochromic anemia (30%) were the most common hematological abnormalities. Caudal thoracic masses were demonstrated on survey radiographs of 13/15 of the dogs and thoracic spondylitis was detected in 12/15 dogs. Spirocerca lupi eggs were detected in 2/8 patients and worms were demonstrated on 1/11 at necropsy. Ten cases underwent surgical attempt to remove the tumors. In six of them partial esophagectomy (PE) was performed and all of them survived the immediate postoperative hospitalization. Five of the cases that underwent PE also received chemotherapy after surgery (doxorubicin (Adriamycin, Upjohn)) with an average survival time of 267 days. The histopathological results of the esophageal tumors were osteosarcoma (9), fibrosarcoma (5) and undifferentiated sarcoma (1). In areas endemic to spirocercosis, regurgitation or vomiting in dogs and microcytic hypochromic anemia and neutrophilia warrant ruling out esophageal sarcomas. Proper surgical treatment could prolong the dogs' lifespan for months, and improve their quality of life.

  13. EMBOLIZATION AND CHEMOEMBOLIZATION PROSTATIC ARTERIES OF BENIGN PROSTATIC HYPERPLASIA AND PROSTATE CANCER

    Directory of Open Access Journals (Sweden)

    N. B. Tabynbaev

    2017-01-01

    Full Text Available The article gives the results of the use of embolization of prostatic arteries in benign prostatic hyperplasia in 3 patients, two of whom have been with suprapubic drainage of the bladder. The patient was 120 ml without suprapubic drainage of the bladder residual urine. The age of patients was 68 to 70 years. According TRUS, the average prostate volume was 86.0 ± 12.6 cm3 . 4 patients» superselective prostatic artery chemoembolization was performed in prostate cancer. Chemicals for carrying out this procedure served adriamycin at a dose of 50 mg. Two of the four patients with prostate cancer was hormone-resistant form. Three patients had PCa T3b N0M0 stage T2bN0M0 histologically verified number Gleason 7, 7, 8, 9. All four had difficulty urinating, the amount of residual urine was 54 to 98 ml. As a source of transportation used chemotherapy microspheres (gepasfery size of 300–500 microns. Treatment outcomes assessed at one month. The efficiency of the methods for the treatment of benign prostatic hyperplasia and prostate cancer in the form of return of spontaneous urination, decrease in residual urine, reducing the prostate-specific antigen. 

  14. Increased incidence of cerebral metastases in sarcoma patients with prolonged survival from chemotherapy. Report of cases of leiomysarcoma and chondrosarcoma.

    Science.gov (United States)

    Gercovich, F G; Luna, M A; Gottlieb, J A

    1975-11-01

    Soft tissue and bony sarcomas rarely metastasize to the central nervous system, particularly to the cerebral hemispheres. In 456 patients with metastatic sarcoma, only 6 (1.3%) had cerebral metastases documented by brain scan at the time of referral for chemotherapy. Adriamycin-containing combination chemotherapeutic regimens have led to a significant increase in the median survival of patients from the start of chemotherapy (18 + months for responders compared, to 7 months in nonresponders). Of 14 patients relapsing after a response or stabilization of disease of 6 months or greater, the cause of relapse was the development of cerebral metastases in 5 (36%). Two of these cases, one a patient with leiomyosarcoma and one with chondrosarcoma, were documented by autopsy and are reported in detail because of their rarity in the medical literature. Although the numbers are small, the increased incidence of cerebral metastases in the group relapsing after a lengthy response suggests that improved chemotherapy for sarcomas resulting in improved survival may be chaning the pattern of metastatic disease, and may require new the;apeutic approaches.

  15. Synthesis and biological evaluation of D-ring fused 1,2,3-thiadiazole dehydroepiandrosterone derivatives as antitumor agents.

    Science.gov (United States)

    Cui, Hai-Wei; Peng, Shihong; Gu, Xiang-Zhong; Chen, Huang; He, Yuan; Gao, Wei; Lv, Fang; Wang, Jin-Hua; Wang, Yan; Xie, Jia; Liu, Ming-Yao; Yi, Zhengfang; Qiu, Wen-Wei

    2016-03-23

    A series of D-ring fused 1,2,3-thiadiazole DHEA derivatives were synthesized and investigated for their activity against the growth of various tumor cell lines using the sulforhodamine B (SRB) assay. It is amazing that for these compounds, T47D cell line was much more sensitive than other tumor cell lines. The most potent saturated N-heterocyclic derivatives showed similar antitumor effect with the positive control compound ADM (adriamycin) on T47D cells, that was 44-60 folds more potent than the lead compound DHEA. Most compounds with potent antitumor activity displayed low toxicity on normal human fibroblasts (HAF). Especially compound 25 (CH33) showed an IC50 of 0.058 μM on T47D cells and its selectivity index (SI) between HAF and T47D was 364, which was 214 folds better than ADM (SI = 1.7). The apoptosis, colony formation and transwell migration assays of 25 were performed on T47D cell line. The primary mechanism study showed that 25 caused a dose-dependent induction of apoptosis, and induced phosphorylation of EphA2 and EphB3 in T47D cells. The in vivo antitumor effect of 25 was also observed in T47D tumor-bearing mice without obvious toxicity. Copyright © 2016 Elsevier Masson SAS. All rights reserved.

  16. Albumin-associated free fatty acids induce macropinocytosis in podocytes.

    Science.gov (United States)

    Chung, Jun-Jae; Huber, Tobias B; Gödel, Markus; Jarad, George; Hartleben, Björn; Kwoh, Christopher; Keil, Alexander; Karpitskiy, Aleksey; Hu, Jiancheng; Huh, Christine J; Cella, Marina; Gross, Richard W; Miner, Jeffrey H; Shaw, Andrey S

    2015-06-01

    Podocytes are specialized epithelial cells in the kidney glomerulus that play important structural and functional roles in maintaining the filtration barrier. Nephrotic syndrome results from a breakdown of the kidney filtration barrier and is associated with proteinuria, hyperlipidemia, and edema. Additionally, podocytes undergo changes in morphology and internalize plasma proteins in response to this disorder. Here, we used fluid-phase tracers in murine models and determined that podocytes actively internalize fluid from the plasma and that the rate of internalization is increased when the filtration barrier is disrupted. In cultured podocytes, the presence of free fatty acids (FFAs) associated with serum albumin stimulated macropinocytosis through a pathway that involves FFA receptors, the Gβ/Gγ complex, and RAC1. Moreover, mice with elevated levels of plasma FFAs as the result of a high-fat diet were more susceptible to Adriamycin-induced proteinuria than were animals on standard chow. Together, these results support a model in which podocytes sense the disruption of the filtration barrier via FFAs bound to albumin and respond by enhancing fluid-phase uptake. The response to FFAs may function in the development of nephrotic syndrome by amplifying the effects of proteinuria.

  17. IL-33-Mediated Expansion of Type 2 Innate Lymphoid Cells Protects from Progressive Glomerulosclerosis.

    Science.gov (United States)

    Riedel, Jan-Hendrik; Becker, Martina; Kopp, Kerstin; Düster, Mathis; Brix, Silke R; Meyer-Schwesinger, Catherine; Kluth, Luis A; Gnirck, Ann-Christin; Attar, Madena; Krohn, Sonja; Fehse, Boris; Stahl, Rolf A K; Panzer, Ulf; Turner, Jan-Eric

    2017-07-01

    Innate lymphoid cells (ILCs) have an important role in the immune system's response to different forms of infectious and noninfectious pathologies. In particular, IL-5- and IL-13-producing type 2 ILCs (ILC2s) have been implicated in repair mechanisms that restore tissue integrity after injury. However, the presence of renal ILCs in humans has not been reported. In this study, we show that ILC populations are present in the healthy human kidney. A detailed characterization of kidney-residing ILC populations revealed that IL-33 receptor-positive ILC2s are a major ILC subtype in the kidney of humans and mice. Short-term IL-33 treatment in mice led to sustained expansion of IL-33 receptor-positive kidney ILC2s and ameliorated adriamycin-induced glomerulosclerosis. Furthermore, the expansion of ILC2s modulated the inflammatory response in the diseased kidney in favor of an anti-inflammatory milieu with a reduction of pathogenic myeloid cell infiltration and a marked accumulation of eosinophils that was required for tissue protection. In summary, kidney-residing ILC2s can be effectively expanded in the mouse kidney by IL-33 treatment and are central regulators of renal repair mechanisms. The presence of ILC2s in the human kidney tissue identifies these cells as attractive therapeutic targets for CKD in humans. Copyright © 2017 by the American Society of Nephrology.

  18. Bilateral adrenal non-Hodgkin lymphoma type B.

    Science.gov (United States)

    Tumino, S; Leotta, M L; Branciforte, G; Mantero, F; Calogero, A E

    2003-11-01

    The adrenal localization of a primary non-Hodgkin lymphoma (NHL) is rare. We report a case of a 66-yr-old woman who had severe asthenia, diffuse skin hitching and abdominal pain. The physical examination revealed poor general conditions, irritability, pallor, dehydration and diffuse skin scratching lesions. The abdomen was painful at left hypochondrium and the Giordano's maneuvre was positive on both sides. A peripheral blood smear showed the presence of big rare lymphocytes with dyshomogeneous chromatin and granulated and hyperbasophil cytoplasm. She underwent abdominal ultrasonography which showed the presence of a hypoechogenic ovoidal mass (major diameter 8.4 cm) within the splenorenal left region. The presence of the suprarenal mass was confirmed by computed tomography (CT) scan which showed an enlarged left adrenal gland (8.1 x 6.2 cm) of solid structure. The right adrenal gland was also enlarged and of round shape (4.5 cm). CT scan-guided fine needle aspiration biopsy was then carried out on the left adrenal mass. It revealed the presence of NHL type B with large cells and modest T-lymphocyte reactive component. The patient was treated with three cycles of cyclophosphamide, adriamycin, vincristine and prednisolone. At the end of the third cycle, there was a transient clinical improvement and the hitching disappeared, but the patient worsened rapidly and she died few weeks later.

  19. Chemistry and Selective Tumor Cell Growth Inhibitory Activity of Polyketides from the South China Sea Sponge Plakortis sp.

    Science.gov (United States)

    Li, Jiao; Li, Cui; Riccio, Raffaele; Lauro, Gianluigi; Bifulco, Giuseppe; Li, Tie-Jun; Tang, Hua; Zhuang, Chun-Lin; Ma, Hao; Sun, Peng; Zhang, Wen

    2017-05-03

    Simplextone E (1), a new metabolite of polyketide origin, was isolated with eight known analogues (2-9) from the South China Sea sponge Plakortis sp. The relative configuration of the new compound was elucidated by a detailed analysis of the spectroscopic data and quantum mechanical calculation of NMR chemical shifts, aided by the newly reported DP4+ approach. Its absolute configuration was determined by the TDDFT/ECD calculation. Simplextone E (1) is proven to be one of the isomers of simplextone D. The absolute configuration at C-8 in alkyl chain of plakortone Q (2) was also assigned based on the NMR calculation. In the preliminary in vitro bioassay, compounds 6 and 7 showed a selective growth inhibitory activity against HCT-116 human colon cancer cells with IC50 values of 8.3 ± 2.4 and 8.4 ± 2.3 μM, corresponding to that of the positive control, adriamycin (IC50 4.1 μM). The two compounds also showed selective activities towards MCF-7 human breast cancer and K562 human erythroleukemia cells while compound 3 only displayed weak activity against K562 cells.

  20. Effects of melanocortin 1 receptor agonists in experimental nephropathies.

    Directory of Open Access Journals (Sweden)

    Annika Lindskog Jonsson

    Full Text Available Nephrotic syndrome, characterized by massive proteinuria, is caused by a large group of diseases including membranous nephropathy (MN and focal segmental glomerulosclerosis (FSGS. Although the underlying mechanisms are beginning to unravel, therapy is unspecific and far from efficient. It has been suggested that adrenocorticotropic hormone (ACTH has beneficial effects in patients with MN and possibly in other nephrotic diseases. We have previously reported that ACTH may act directly on podocytes through the melanocortin 1 receptor (MC1R. In the present study, we evaluate the effect of highly specific MC1R agonists in two different nephrotic disease models. Experimental MN: Passive Heymann nephritis (PHN was induced in rats that were treated for four weeks with MS05, a selective MC1R agonist, or saline. The degree of albuminuria was significantly reduced over time and the effect was sustained one week after treatment withdrawal (p<0.05. Experimental FSGS: Based on a dose-response study, two doses of adriamycin were used for induction of nephropathy in Balb/c mice. Mice were treated with either a synthetic MC1R agonist (BMS-470539, with α-melanocyte stimulating hormone (α-MSH or with saline. There was no beneficial effect of treatment. In summary, MC1R agonists reduce albuminuria and improve morphology in experimentally induced MN whereas they have no effect in experimental FSGS. The results illustrate the differences in these podocytopathies in terms of signaling mechanisms underlying proteinuria, and progression of disease.

  1. Theoretical consideration of drug distribution kinetics in a noneliminating organ: comparison between a "homogeneous (well-stirred)" model and "nonhomogeneous (tube)" model.

    Science.gov (United States)

    Terasaki, T; Sugiyama, Y; Iga, T; Sawada, Y; Hanano, M

    1985-06-01

    Drug distribution kinetics in a noneliminating organ or tissue has been mathematically examined. The homogeneous (well-stirred) model regards the noneliminating organ or tissue as a homogeneous compartment in which the drug is equilibrated with that in the blood leaving the organ or tissue. The nonhomogeneous (tube) model views the noneliminating organ or tissue as comprising a number of parallel cylindrical tubes containing binding sites distributed homogeneously along these tubes. These two models are examined, considering the pseudo-distribution equilibrium phase after bolus injection and a linear binding condition. Although both models predict a similar tissue distribution under a variety of conditions, significant differences exist in the predictions of various pharmacokinetic parameters as a function of the drug distribution, such as blood flow, organ volume, slope of the terminal phase, and the tissue-to-blood partition coefficients. The predictability and limitations of these two models are explored. Distribution characteristics of the two models are also examined for adriamycin, actinomycin D, tetrachlorobiphenyl, hexachlorobiphenyl, digoxin, and ethoxybenzamide; no difference is observed. It is concluded that the assumption of a homogeneous (well-stirred) compartment is suitable for describing the drug distribution kinetics of these drugs.

  2. Final results of a single institution experience with a pediatric-based regimen, the augmented Berlin-Frankfurt-Münster, in adolescents and young adults with acute lymphoblastic leukemia, and comparison to the hyper-CVAD regimen.

    Science.gov (United States)

    Rytting, Michael E; Jabbour, Elias J; Jorgensen, Jeffrey L; Ravandi, Farhad; Franklin, Anna R; Kadia, Tapan M; Pemmaraju, Naveen; Daver, Naval G; Ferrajoli, Alessandra; Garcia-Manero, Guillermo; Konopleva, Marina Y; Borthakur, Gautam; Garris, Rebecca; Wang, Sa; Pierce, Sherry; Schroeder, Kurt; Kornblau, Steven M; Thomas, Deborah A; Cortes, Jorge E; O'Brien, Susan M; Kantarjian, Hagop M

    2016-08-01

    Several studies reported improved outcomes of adolescents and young adults (AYA) with acute lymphoblastic leukemia (ALL) treated with pediatric-based ALL regimens. This prompted the prospective investigation of a pediatric Augmented Berlin-Frankfurt-Münster (ABFM) regimen, and its comparison with hyper-fractionated cyclophosphamide, vincristine, Adriamycin, and dexamethasone (hyper-CVAD) in AYA patients. One hundred and six AYA patients (median age 22 years) with Philadelphia chromosome- (Ph) negative ALL received ABFM from October 2006 through March 2014. Their outcome was compared to 102 AYA patients (median age 27 years), treated with hyper-CVAD at our institution. The complete remission (CR) rate was 93% with ABFM and 98% with hyper-CVAD. The 5-year complete remission duration (CRD) were 53 and 55%, respectively (P = 0.98). The 5-year overall survival (OS) rates were 60 and 60%, respectively. The MRD status on Day 29 and Day 84 of therapy was predictive of long-term outcomes on both ABFM and hyper-CVAD. Severe regimen toxicities with ABFM included hepatotoxicity in 41%, pancreatitis in 11%, osteonecrosis in 9%, and thrombosis in 19%. Myelosuppression-associated complications were most significant with hyper-CVAD. In summary, ABFM and hyper-CVAD resulted in similar efficacy outcomes, but were associated with different toxicity profiles, asparaginase-related with ABFM and myelosuppression-related with hyper-CVAD. Am. J. Hematol. 91:819-823, 2016. © 2016 Wiley Periodicals, Inc. © 2016 Wiley Periodicals, Inc.

  3. Long-term survival and quality of life in patients treated with a national all protocol 15-20 years earlier: IDM/HDM and late effects?

    Science.gov (United States)

    Moe, P J; Holen, A; Glomstein, A; Madsen, B; Hellebostad, M; Stokland, T; Wefring, K W; Steen-Johnsen, J; Nielsen, B; Howlid, H; Børsting, S; Hapnes, C

    1997-01-01

    In a follow-up matched control study the 93 (70.5%) survivors of 132 children treated with a national protocol for acute lymphoblastic leukemia (ALL) and 5 survivors of the other 21 cases of ALL in childhood diagnosed in the same period were evaluated. Thus it was also a population-based study. The national treatment protocol was used in the period 1975-1980. Methotrexate (MTX) infusions combined with intrathecal MTX were used as prophylaxis against neuroleukemia instead of irradiation. Neither doxorubicin (Adriamycin) nor cyclophosphamide was used in the protocol. A questionnaire covering demographic data, number of offspring, learning problems, level of athletic performance, education, and work status as well as medical information was used. Forms were received from 94 (96%) of the 98 adult surviving cases and corresponding controls in the family. Interviews were performed in the remaining four cases (4%). There were no statistical differences between the two groups with respect to physical and mental health and quality of life. Hospital records of all patients were also checked for possible late effects. There was no definite case of secondary malignant neoplasm; however, there was one case of prolactinoma and only one case of serious sequelae (hemiparesis during therapy), probably due to intrathecal and intravenous MTX.

  4. Enhancement of tumor radioresponse by combined chemotherapy in murine hepatocarcinoma

    Energy Technology Data Exchange (ETDEWEB)

    Seong, Jin Sil; Kim, Sung Hee; Suh, Chang Ok [College of Medicine, Yonsei Univ., Seoul (Korea, Republic of)

    2000-12-01

    The purpose of this study was to identify drugs that can enhance radioresponse of murine hepatocarcinoma. C3H/HeJ mice bearing 8 mm tumors of murine hepatocarcinoma, HCa-l, were treated with 25 Gy radiation and one of the following drugs: 5-Fu, 150 mg/kg; adriamycin, 8 mg/kg; cisplatin, 6 mg/kg; paclitaxel, 40 mg/kg; and gemcitabine, 50 mg/kg. Tumor response to the treatment was determined by tumor growth delay assay and by enhancement factor. Apoptotic level was assessed in tissue sections. Expression of regulating molecules was analyzed by western blotting for p53, 8c1-2, Sax, Bel-XL, Bd-XS, and p21{sup WAF1/CIP1}. Among the drugs tested, only gemcitabine enhanced the antitumor effect of radiation, with enhancement factor of 1.6. Induction of apoptosis by a combination of gerncitabine and radiation was shown as only additive level. In analysis of radiation-induced expression of regulating molecules, the most significant change by combining gemcitabine was activation of p21 {sup WAF1/CIP1}. Gemcitabine is the first drug showing an enhancement of radioresponse in murine hepatocarcinoma, when combined with radiation. The key element of enhancement is thought to be p21{sup WAF1/CIP1}.

  5. Demodex spp. Infestation in a breast-cancer patient: A case report.

    Science.gov (United States)

    Olt, Serdar; Yalçın, Gülter Gülter; Uysal, Ozlem Sönmez; Karakeçe, Engin; Ciftci, Ihsan Hakkı

    2013-09-01

    Demodex folliculorum and Demodex brevis are obligatory parasites that live in sebaceous glands and follicles. When immune system becomes suppressed by any reason, patients become vulnerable to obligatory parasites like D. folliculorum and D. brevis. Immune system becomes suppressed in cancer patients who undergo chemotherapy, and as a result these patients become vulnerable to infestations. In our case, a 45 year-old female has been admitted to oncology clinic for a medical treatment of breast cancer. Her systematic physical examination was normal, except redness on her cheeks and forehead. There was no abnormality in biochemical and haematological laboratory values. We have decided to apply chemotherapy of Adriamycin, cyclophosphamide and 5-fluorouracil. Due to the itchy redness on her cheeks and forehead, we had performed an examination for demodex before chemotherapy; and we have identified 20 mites/cm(2) on her right and left cheeks, and 15 mites/cm(2) on her forehead. When our patient had came our clinic with increasing complaint of itchy rash, after the first course of chemotherapy we have reexamined demodex. The result of microscopic examination revealed large amount of demodex of 50 mites/cm(2) on her right and left cheeks and 30 mites/cm(2) on her forehead, which were nearly 2.5-times higher than the previous examination. This increase probably was associated with immune suppression of chemotherapy.

  6. [Fibrosarcoma of the spermatic cord detected with an inguinal tumor : a case report].

    Science.gov (United States)

    Itami, Yoshitaka; Hosokawa, Yukinari; Iida, Kouta; Shinohara, Masatake; Hayashi, Yoshiki; Takenaga, Maho; Fujimoto, Kiyohide

    2013-10-01

    We report a case of fibrosarcoma of the spermatic cord detected with an inguinal tumor. A 45-year old man was admitted to our hospital for further examination of a right inguinal tumor. Computed tomography (CT) and magnetic resonance imaging revealed a right spermatic cord tumor,45 mm in size, and a retroperitoneal tumor in proximity to the right external iliac artery,55 mm in size. He was clinically suspected as having malignant lymphoma. As the differential diagnosis, liposarcoma and leiomyosarcoma were considered. High orchidectomy was performed for the purpose of diagnosis. The histopathological examination suggested fibrosarcoma, with a positive surgical margin. Six days after high orchidectomy, retroperitoneal tumor extirpation was performed. Total resection was difficult because the adhesion with the external iliac vein was strong. The tumor was extirpated as much as possible. The result of the histopathological examination showed fibrosarcoma. Adjuvant radiotherapy (54 Gy) was performed. After radiotherapy, local recurrence was detected by CT. He underwent systemic chemotherapy with adriamycin (60 mg/m2). After 3 courses, there was a slight reduction in tumor size. However, his general condition rapidly deteriorated with marked cachexy and he died six months from the first medical examination.

  7. Mediastinal Choriocarcinoma Masquerading as Relapsed Hodgkin Lymphoma

    Directory of Open Access Journals (Sweden)

    Selay Lam

    2011-10-01

    Full Text Available Primary mediastinal choriocarcinoma is a rare extragonadal germ cell malignancy. We describe the first case of a patient who developed mediastinal choriocarcinoma after treatment for Hodgkin lymphoma (HL. A 25-year-old man with classic HL, nodular sclerosis subtype, underwent treatment with splenectomy followed by radiation therapy. Unfortunately, his disease relapsed with a paraspinal mass, and he was subsequently treated with MOPP (mechlorethamine, Oncovin, procarbazine, and prednisone alternating with ABVD (Adriamycin, bleomycin, vinblastine, and dacarbazine. He achieved a complete remission after 6 cycles. Ten years after treatment, the patient presented with a persistent cough, haemoptysis, right supraclavicular lymphadenopathy, and weight loss. His chest X-ray showed opacification of the lower right hemithorax with a widened mediastinum. Given unresponsiveness to several antibiotics and lack of evidence for lung volume loss, there were concerns over lung infiltration with relapsed lymphoma. Transbronchial fine needle aspiration biopsy suggested recurrence of his HL. MOPP alternating with ABVD was again given. Due to disease progression, brachytherapy as well as a cocktail of dexamethasone, cytarabine, and cisplatin were also tried. However, on a subsequent excisional lymph node biopsy, it turned out that the tumour was in fact choriocarcinoma and not relapsed HL. Unfortunately, despite aggressive therapy, the patient’s disease rapidly progressed, and he died within 2 weeks.

  8. Bladder preservation by internal iliac arterial infusion chemotherapy and irradiation in T3 bladder carcinoma patients over the age of 70 years

    Energy Technology Data Exchange (ETDEWEB)

    Hoshi, Senji; Shintaku, Ichiro; Suzuki, Ken-ichi; Takahashi, Toshiko; Kaihou, Yasuhiro; Ishidoya, Shigeto; Namima, Takashige; Ohyama, Chikara; Orikasa, Seiichi [Tohoku Univ., Sendai (Japan). School of Medicine

    2000-12-01

    Treatment by internal iliac arterial infusion chemotherapy (IA) combined with pelvic irradiation has proved to be effective for locally invasive bladder. Eight male patients, median age of 78 years (range 73-81) were enrolled. Pretreatment CT and whole layer core biopsy revealed T3a or T3b. Pelvic CT or fine needle aspiration biopsy following bipedal lymphography revealed N0 in 4 cases, N2 in 2 and N3 in 2, respectively. Three to 7 cycles of cisplatin (CDDP) 30-50 mg/m{sup 2}, methotrexate 20 mg/m{sup 2} and tetrahydropymnyl-adriamycin 20 mg/m{sup 2} every 3 week was administered combined with 40-50 Gy of whole pelvis irradiation. In 4 renal function impaired patients, 100 mg/m{sup 2} of carboplatin was administered instead of CDDP. All patients obtained complete response and the bladders were preserved. Observation periods were from 9 to 75 months (median 37 months). One N2 patient died with metastatic disease and two died without carcinoma. Two patients developed invasive bladder cancer on the side opposite to the primary tumors. Both were successfully treated by IA and irradiation. Bladders of all except one patient functioned for a long period. Side effects of IA and irradiation were not significant. IA combined with pelvic irradiation is effective and safe for elderly patients with bladder carcinoma. (author)

  9. p53 and PPP1R13L (alias iASPP or RAI) form a feedback loop to regulate genotoxic stress responses

    DEFF Research Database (Denmark)

    Laska, Magdalena J; Vogel, Ulla B; Jensen, Uffe B

    2010-01-01

    Background: PPP1R13L gene has been found to be over-expressed in variety of cancers and its expression in p53 wild-type background is sufficient to promote tumor growth in vivo. However, in the non-transformed cells it acts as a tumor suppressor which suggests that the role of PPP1R13L...... is multifaceted. Methods: We have used siRNA optimized for inhibition of p53, PPP1R13L, BAX and GADD45 alpha expression and investigated the role of those gene products for PPP1R13L expression and induction in a variety of mouse and human cells with different p53 status. In addition we have applied Western Blot...... in PPP1R13L activation after adriamycin and/or etoposide treatments. Treatment of the cells with the proteasome inhibitor MG-132 resulted in the accumulation of both p53 and PPP1R13L proteins. Conclusions: We have provided evidence that endogenous PPP1R13L acts as a negative regulator of p53 function...

  10. Chemotherapy-induced irreversible alopecia in early breast cancer patients.

    Science.gov (United States)

    Kim, Gun Min; Kim, Sanghwa; Park, Hyung Seok; Kim, Jee Ye; Nam, Sanggen; Park, Seho; Kim, Seung Il; Kim, DoYoung; Sohn, Joohyuk

    2017-06-01

    The purpose of this work is to determine the prevalence of chemotherapy-induced irreversible alopecia (CIIA), which is defined as an alopecia that exists at least 6 months after completion of chemotherapy and factors affecting CIIA in early breast cancer patients. We performed a cross-sectional study. We retrospectively identified breast cancer patients who had received AC (Adriamycin, Cyclophosphamide) or AC-T (AC followed by Taxane) as neoadjuvant or adjuvant chemotherapy. We conducted questionnaire survey regarding alopecia and measured hair density using phototrichogram. From February 2015 to May 2015, among 265 patients who responded properly to the questionnaire, the women who answered they had severe alopecia (alopecia > 50% of scalp) were 19 patients (7.2%). AC-only and AC-T treated patients reported severe alopecia in 2.7% and 10.5%, respectively, which were significantly different (p < 0.001). Mean hair density was 75 hair/cm 2 (range 42-112) and 75.2/cm 2 (range 48.3-102) on occipital area and vertex area, respectively. Hair loss was the most frequent in parietal area (42.6%). Half of total patients (46%) and 73% of CIIA patients regarded that their hair became thinner after chemotherapy CONCLUSIONS: We found that significant proportion of early breast cancer patients were suffering from severe CIIA, especially when they had been treated with AC followed by taxane regimen.

  11. Postgraduate Courses in Pharmaceutical Medicine in Italy

    Directory of Open Access Journals (Sweden)

    Domenico Criscuolo

    2017-06-01

    Full Text Available Italy has a significant tradition of excellence in the area of clinical trials (CTRs: important achievements in the clinical development of rifampicin and adriamycin, the two most famous drugs discovered in the research laboratories of two Italian pharmaceutical companies, paved the way to the establishment of a culture of clinical development, mainly in the areas of antimicrobials and oncology. Despite the fact that now the Italian market of pharmaceuticals is largely dominated by multinational companies with headquarters outside Italy, the contribution of Italian studies to the clinical development of new drugs is still significant. Indeed, it largely exceeds the percentage of Italian inhabitants versus the ones living in the remaining EU countries, as Italy has about 12% of EU population, but has a 17% share of the EU CTRs. Education in Pharmaceutical Medicine is now a must for all professionals interested to work either in pharma companies or in contract research organizations: several Italian universities are offering high quality courses, and in the last 10 years, more than 1,200 professionals received a postgraduate education in pharmaceutical medicine. This result places Italy on top of countries concerned about the professional education of people involved in drug development and will represent an asset for a larger involvement of Italian clinical sites in the global process of clinical research.

  12. Intraperitoneal hemorrhage due to spontaneous rupture of hepatocellular carcinoma: comparisons of transarterial oily chemoembolization and simple embolization with gelfoam

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Jeong Min; Han, Young Min; Ym, Young Soo [Chonbuk National University Hospital, Chonju (Korea, Republic of); Ym, Seong Hee [Namwon Medical Center, Chonju (Korea, Republic of); Kweon, Keun Sang [Chonbuk National University, Chonju (Korea, Republic of)

    2000-08-01

    To compare the safety and effectiveness of transarterial oily chemoembolization (TOCE) and transarterial embolization (TAE) with gelfoam in cases of ruptured hepatocellular carcinoma (HCC), and to describe the most important prognostic factors involved in emergency embolization. Forty-two consecutive patients with spontaneously ruptured HCC underwent emergency TOCE (n=3D22) or TGE (n=3D20). In the TOCE group, Lipiodol (3-10 cc), Adriamycin (20-50 mg), and Mitomycin (2-10 mg) were used, and these were followed by blockade of the hepatic arterial flow with gelatin sponge particles. In the TAE group, patients underwent only gelfoam embolization. Using the Kaplan-Meier method, survival time from the time of embolization was estimated, and to analyze prognostic factors, Cox's proportional hazard regression model was used. Successful hemostasis was achieved in 41 patients (97.6%). Mean survival time was 201 and 246 days in the TOCE and TAE group, respectively, but the difference was not statistically significant (p greater than 0.05). Five of the TOCE group (22.7%) and three of the TAE group (15.0%) died of hepatic failure. Analysis of the prognostic factors showed that portal vein involvement by the tumor was the most important factor influencing survival. Although TOCE and TAE effectively controlled hemorrhaging from a ruptured HCC, the procedures involve a high risk of hepatic failure. Their goal should, therefore, be solely to achieve hemostasis, and thus decrease parenchymal injury. (author)

  13. Studies on the antimutagenic activities of garlic extract

    Energy Technology Data Exchange (ETDEWEB)

    Knasmueller, S. (Univ. of Innsbruck (Austria)); Szakmary, A. (Austrian Research Center Seibersdorf (Austria)); Domjan, G. (State Sanatory Sopron (Hungary)); de Martin, R. (Sandoz Research Institute, Basle (Switzerland))

    1989-01-01

    Experiments with Salmonella tester strains indicated that aqueous garlic extract possesses antimutagenic properties toward ionizing radiation, peroxides, adriamycin, and N-methyl-N{prime}-nitro-nitrosoguanidine. The assumption that radical scavenging garlic constituents, i.e., molecules with sulfur moieties, might be responsible for the inhibitory effect of aqueous extract toward mutagenesis induced by radiation and radiomimetic compounds was confirmed by the results of subsequent experiments; (1) garlic extract attenuated the lethal effects of {gamma}-rays on repair-deficient E. coli strains; (2) the garlic constituent allicin (thio-2-propene-1-sulfinic acid S-allyl ester) is partly responsible for the reduced radiation-induced mutagenesis in Salmonella typhimurium TA 102. No such inhibitory effects were detected with alliin (S-allyl-L-cysteine sulfoxide) or cysteine; (3) aqueous garlic extract inhibited hydrogen-peroxide-induced lipid peroxidation. Results obtained in preliminary experiments with Chinese hamster ovary cells suggest that the antimutagenic properties of garlic extract are not restricted to procaryotic cells.

  14. Two New Thymol Derivatives from the Roots of Ageratina adenophora.

    Science.gov (United States)

    Dong, Li-Mei; Zhang, Mei; Xu, Qiao-Lin; Zhang, Qiang; Luo, Bi; Luo, Qing-Wen; Liu, Wen-Bin; Tan, Jian-Wen

    2017-04-08

    Two new thymol derivatives, 7,9-diisobutyryloxy-8-ethoxythymol (1) and 7-acetoxy-8-methoxy-9-isobutyryloxythymol (2), were isolated from fresh roots of Ageratina adenophora, together with four known compounds, 7,9-di-isobutyryloxy-8-methoxythymol (3), 9-oxoageraphorone (4), (-)-isochaminic acid (5) and (1α,6α)-10-hydroxycar-3-ene-2-one (6). Their structures were established on the basis of detailed spectroscopic analysis, and they were all isolated from the roots of A. adenophora for the first time. All the compounds were tested for their in vitro antibacterial activity toward three Gram-positive and two Gram-negative bacterial strains. Thymol derivatives 1-3 only selectively showed slight in vitro bacteriostatic activity toward three Gram-positive bacteria. The two known carene-type monoterpenes 5 and 6 were found to show moderate in vitro antibacterial activity against all five tested bacterial strains, with MIC values from 15.6 to 62.5 μg/mL. In addition, compounds 5 and 6 were further revealed to show in vitro cytotoxicity against human tumor A549, HeLa and HepG2 cell lines, with IC50 values ranging from 18.36 to 41.87 μM. However, their cytotoxic activities were inferior to those of reference compound adriamycin.

  15. Arsenic trioxide in the mechanism of drug resistance reversal in MCF-7/ADM cell line of human breast cancer.

    Science.gov (United States)

    Wang, Xiuli; Kong, Li; Zhao, Jinyao; Yang, Peiman

    2002-07-01

    To investigate the effect of drug resistance by arsenic trioxide (As(2)O(3)) and its possible mechanism in human breast cancer cell line MCF-7/ADM. Cytotoxicity of As(2)O(3) and the sensibility to adriamycin (ADM) in MCF-7/ADM cell line, a ADM-resistance cell line of human breast cancer, were studied through MTT assay. The concentration of intracellular ADM was detected by spectrofluorometry. With MCF-7/ADM cells treated with As(2)O(3) in combination with ADM, the glutathione-s-transferase (GST) activity was measured by biochemical method. The expression of GST-pi mRNA was assessed by RT-PCR. The non-cytotoxic dose of As(2)O(3) was 0.2 micro mol/L and the low cytotoxic dose was 0.8 micro mol/L to MCF-7/ADM cell line. 0.2 micro mol/L As(2)O(3) could significantly increase the intracellular accumulation of ADM in MCF-7/ADM cell line (P breast cancer, which may be related to the variation of GST-pi enzyme.

  16. Acquisition of anoikis resistance in human osteosarcoma cells does not alter sensitivity to chemotherapeutic agents

    Directory of Open Access Journals (Sweden)

    McIntyre Bradley W

    2005-04-01

    Full Text Available Abstract Background Chemotherapy-induced cell death can involve the induction of apoptosis. Thus, aberrant function of the pathways involved might result in chemoresistance. Since cell adhesion to the extracellular matrix acts as a survival factor that homeostatically maintains normal tissue architecture, it was tested whether acquisition of resistance to deadhesion-induced apoptosis (anoikis in human osteosarcoma would result in resistance to chemotherapy. Methods Osteosarcoma cell lines (SAOS-2 and TE-85 obtained from ATCC and were maintained in complete Eagle's MEM medium. Suspension culture was established by placing cells in tissue culture wells coated with poly-HEMA. Cell cytotoxicity was determined using a live/dead cytotoxicity assay. Cell cycle/apoptosis analyses were performed using propidium iodide (PI staining with subsequent FACS analysis. Apoptosis was also assayed by Annexin-FITC/PI staining. Results Etoposide, adriamycin, vinblastine, cisplatin and paclitaxel were able to induce apoptosis in human osteosarcoma cells SAOS-2 regardless of their anoikis resistance phenotype or the culture conditions (adhered vs. suspended. Moreover, suspended anoikis resistant TE-85 cells (TE-85ar retained their sensitivity to chemotherapy as well. Conclusion Acquisition of anoikis resistance in human osteosarcoma cells does not result in a generalized resistance to all apoptotic stimuli, including chemotherapy. Moreover, our results suggest that the pathways regulating anoikis resistance and chemotherapy resistance might involve the action of different mediators.

  17. Cucurbitacin B exerts anti-cancer activities in human multiple myeloma cells in vitro and in vivo by modulating multiple cellular pathways

    Science.gov (United States)

    Huang, Ning; Zhong, Yueling; Zeng, Ting; Wei, Rong; Wu, Zhongjun; Xiao, Cui; Cao, Xiaohua; Li, Minhui; Li, Limei; Han, Bin; Yu, Xiaoping; Li, Hua; Zou, Qiang

    2017-01-01

    Cucurbitacin B (CuB), a triterpenoid compound isolated from the stems of Cucumis melo, has long been used to treat hepatitis and hepatoma in China. Although its remarkable anti-cancer activities have been reported, the mechanism by which it achieves this therapeutic activity remains unclear. This study was designed to investigate the molecular mechanisms by which CuB inhibits cancer cell proliferation. Our results indicate that CuB is a novel inhibitor of Aurora A in multiple myeloma (MM) cells, arresting cells in the G2/M phase. CuB also inhibited IL-10-induced STAT3 phosphorylation, synergistically increasing the anti-tumor activity of Adriamycin in vitro. CuB induced dephosphorylation of cofilin, resulting in the loss of mitochondrial membrane potential, release of cytochrome c, and activation of caspase-8. CuB inhibited MM tumor growth in a murine MM model, without host toxicity. In conclusion, these results indicate that CuB interferes with multiple cellular pathways in MM cells. CuB thus represents a promising therapeutic tool for the treatment of MM. PMID:27418139

  18. [Development of human embryonic stem cell platforms for human health-safety evaluation].

    Science.gov (United States)

    Yu, Guang-yan; Cao, Tong; Zou, Xiao-hui; Zhang, Xue-hui; Fu, Xin; Peng, Shuang-qing; Deng, Xu-liang; Li, Sheng-lin; Liu, He; Xiao, Ran; Ouyang, Hong-wei; Peng, Hui; Chen, Xiao; Zhao, Zeng-ming; Wang, Xiao-ying; Fang, Hai-qin; Lu, Lu; Ren, Yu-lan; Xu, Ming-ming

    2016-02-18

    The human embryonic stem cells (hESCs) serve as a self-renewable, genetically-healthy, pluripotent and single source of all body cells, tissues and organs. Therefore, it is considered as the good standard for all human stem cells by US, Europe and international authorities. In this study, the standard and healthy human mesenchymal progenitors, ligament tissues, cardiomyocytes, keratinocytes, primary neurons, fibroblasts, and salivary serous cells were differentiated from hESCs. The human cellular health-safety of NaF, retinoic acid, 5-fluorouracil, dexamethasone, penicillin G, adriamycin, lead acetate PbAc, bisphenol A-biglycidyl methacrylate (Bis-GMA) were evaluated selectively on the standardized platforms of hESCs, hESCs-derived cardiomyocytes, keratinocytes, primary neurons, and fibroblasts. The evaluations were compared with those on the currently most adopted cellular platforms. Particularly, the sensitivity difference of PM2.5 toxicity on standardized and healthy hESCs derived fibroblasts, currently adopted immortalized human bronchial epithelial cells Beas-2B and human umbilical vein endothelial cells (HUVECs) were evaluated. The RESULTS showed that the standardized hESCs cellular platforms provided more sensitivity and accuracy for human cellular health-safety evaluation.

  19. Chemosensitivity of Anaplastic Thyroid Cancer Based on a Histoculture Drug Response Assay

    Directory of Open Access Journals (Sweden)

    Takashi Uruno

    2015-01-01

    Full Text Available The chemosensitivity of anaplastic thyroid cancer (ATC to some cytotoxic agents was investigated by the histoculture drug response assay (HDRA. Thirty specimens from 22 patients with ATC were obtained from surgically resected subjects. The drugs tested were paclitaxel (PTX, docetaxel (DOC, adriamycin (ADM, nedaplatin (254-S, cisplatin (CDDP, carboplatin (CBDCA, etoposide (VP-16, 5-fluorouracil (5-FU, mitomycin C (MMC, and cyclophosphamide (CPA. PTX was the most effective agent, and 25 of 29 cases (86.2% had high inhibition rates (IRs; over 70%, while DOC, another taxane, had lower IRs (median, 32.6%. 254-S had the second highest IR (median 68.1%, higher than other platins, CDDP (median 47.3% and CBDCA (median 27.4%. The IR of 50% dose PTX (20 μg/mL, median 30.6% was markedly decreased, while that of 50% dose 254-S (10 μg/mL, median 63.3% still retained its inhibition effect compared to 100% dose. Most recurrent samples had higher IRs than primary lesions, but the IRs of different drugs differed between primary and recurrent lesions, even with samples from the same patients. PTX has a higher IR to ATC tissues in the HDRA, which suggests that it may be a key drug for the treatment of patients with ATC.

  20. Paraneoplastic Recurrent Hypoglycaemic Seizures: An Initial Presentation of Hepatoblastoma in an Adolescent Male—A Rare Entity

    Directory of Open Access Journals (Sweden)

    Irappa Madabhavi

    2014-01-01

    Full Text Available Hepatoblastoma (HB is a rare malignant tumour of the liver and usually occurs in the first three years of life. Hepatoblastoma in adolescents and young adults is extremely rare; nevertheless the prognosis is much worse than in childhood, because these kinds of tumours are usually diagnosed late. Characteristic imaging and histopathological and AFP levels help in the diagnosis of hepatoblastoma. Paraneoplastic features of hepatoblastoma are not uncommon at presentation and include erythrocytosis, thrombocytosis, hypocalcaemia, isosexual precocious puberty, and rarely hypoglycaemia. Even though hypoglycaemia is commonly seen in hepatocellular carcinoma, its association with hepatoblastoma is very rare. We present a case of 15-year-old male patient presenting with complaints of recurrent hypoglycaemic seizures ultimately leading to diagnosis of hepatoblastoma. Managed successfully with neoadjuvant chemotherapy, surgery and adjuvant chemotherapy with adriamycin and cisplatin based regimens. An extensive review of literature in the PubMed and MEDLINE did not reveal much data on paraneoplastic recurrent hypoglycaemic seizures as an initial presentation of hepatoblastomas in adolescents and young adults.

  1. Total Body Irradiation for Allogeneic Bone Marrow Transplantation in Chronic Myelogenous Leukemia

    Energy Technology Data Exchange (ETDEWEB)

    Chung, Su Mi; Choi, Ihl Bohng; Kang, Ki Mun; Kim, In Ah; Shinn, Kyung Sub; Kim, Choon Choo; Kim, Dong Jip [Catholic University College of Medicine, Seoul (Korea, Republic of)

    1994-06-15

    Between July 1987 and December 1992, we treated 22 patients with chromic myelogenous leukemia; 14 in the chronic phase and 8 with more advanced disease. All were received with allogeneic bone marrow transplantation from HLA-identical sibling donors after a total body irradiation (TBI) cyclophosphamide conditioning regimen. Patients were non-randomly assigned to either 1200 cGy/6 fractions/3 days (6 patients) or 1320 cGy/8 fractions/4 days (16 patients) by dose of TBI. Of the 22 patients, 8 were prepared with cyclophosphamide alone, 14 were conditioned with additional adriamycin or daunorubicin. To prevent graft versus host disease, cyclosporine was given either alone or in conjunction with methotrexate. The actuarial survival and leukemic-free survival at four years were 58.5% and 41.2%, respectively, and the relapse rate was 36% among 22 patients. There was a statistically significant difference in survival between the patients in chronic phase and more advanced phase (76% vs 33%, p=0.05). The relapse rate of patients receiving splenectomy was higher than that of patients receiving splenic irradiation (50% vs 0%, p=0.04). We conclude that the probability of cure is highest if transplantation is performed while the patient remains in the chronic phase.

  2. [Effects of differentially expressed proteins in hepatocellular carcinoma cell treated by different telomerase inhibitors].

    Science.gov (United States)

    Wei, Xiao; Zhang, Zhiyong; He, Min; Wang, Xia; Zheng, Weiwei

    2010-03-01

    To detect differentially expressed proteins in hepatocellular carcinoma cell line SMMC-7721 treated separately by eight telomerase inhibitors including antisense oligodeoxynuclectide of human telomerase RNA (hTR-ASODN), sense oligodeoxynuclectide of hTR (hTR-SODN), ASODN of human telomerase reverse transcriptase (hTERT-ASODN), SODN of hTERT (hTERT-SODN), epigallocatechin gallate (EGCG), 3'-azido-3'-deoxythymidine (AZT), all trans-retinoic acid (ATRA) and adriamycin (ADM) using surface enhanced laser desorption/ionization time of flight-mass spectrom (SELDI-TOF-MS) technology. SELDI-TOF-MS technology and weak cation exchanger (WCX-2) protein chip were used to detect differentially expressed secretory and cytoplasmic proteins of SMMC-7721 cell treated separately by eight telomerase inhibitors. The control group was hepatocellular carcinoma SMMC-7721 cell without any disposal. The results of WCX-2 protein chip showed that the secretory and cytoplasmic proteins were differentially expressed in SMMC-7721 cell treated separately by eight telomerase inhibitors. But some proteins were down-regulated or up-regulated together in all experimental groups. The molecular weight of these differential proteins were all less than 10,000 Da. Differentially expressed and common changes of proteins in SMMC-7721 cell treated separately by eight telomerase inhibitors would associate with telomerase activity.

  3. Albumin-associated free fatty acids induce macropinocytosis in podocytes

    Science.gov (United States)

    Chung, Jun-Jae; Huber, Tobias B.; Gödel, Markus; Jarad, George; Hartleben, Björn; Kwoh, Christopher; Keil, Alexander; Karpitskiy, Aleksey; Hu, Jiancheng; Huh, Christine J.; Cella, Marina; Gross, Richard W.; Miner, Jeffrey H.; Shaw, Andrey S.

    2015-01-01

    Podocytes are specialized epithelial cells in the kidney glomerulus that play important structural and functional roles in maintaining the filtration barrier. Nephrotic syndrome results from a breakdown of the kidney filtration barrier and is associated with proteinuria, hyperlipidemia, and edema. Additionally, podocytes undergo changes in morphology and internalize plasma proteins in response to this disorder. Here, we used fluid-phase tracers in murine models and determined that podocytes actively internalize fluid from the plasma and that the rate of internalization is increased when the filtration barrier is disrupted. In cultured podocytes, the presence of free fatty acids (FFAs) associated with serum albumin stimulated macropinocytosis through a pathway that involves FFA receptors, the Gβ/Gγ complex, and RAC1. Moreover, mice with elevated levels of plasma FFAs as the result of a high-fat diet were more susceptible to Adriamycin-induced proteinuria than were animals on standard chow. Together, these results support a model in which podocytes sense the disruption of the filtration barrier via FFAs bound to albumin and respond by enhancing fluid-phase uptake. The response to FFAs may function in the development of nephrotic syndrome by amplifying the effects of proteinuria. PMID:25915582

  4. Influence of low absolute lymphocyte count of patients with nongerminal center type diffuse large B-cell lymphoma with R-CHOP therapy.

    Science.gov (United States)

    Song, M-K; Chung, J-S; Seol, Y-M; Kim, S-G; Shin, H-J; Choi, Y-J; Cho, G-J; Shin, D-H

    2010-01-01

    Rituximab has dramatic impact on outcome of patients with diffuse large B-cell lymphoma (DLBCL), especially nongerminal center (non-GC) type. A low absolute lymphocyte count (ALC) before rituximab, cyclophosphamide, vincristine, adriamycin, and prednisone (R-CHOP) therapy as a surrogate marker of immune status is associated with poor clinical outcome in DLBCL. Therefore, we hypothesized that low ALC before R-CHOP would have effect on the survival in non-GC type. One hundred and thirty-six DLBCL patients who were treated with R-CHOP from 2003 to 2007 were analyzed in the present study. ALC > or = 1.0 x 10(9)/l predicted a longer 3-year progression-free survival (PFS) and 3-year overall survival (OS) versus ALC type had similar PFS and OS to germinal center type (68.2% versus 80.0%, P = 0.074 and 72.7% versus 82.9%, P = 0.111, respectively). However, considering clinical influence of the ALC according to immunophenotype, low ALC in non-GC type DLBCL was associated with lower PFS and OS compared with others (PFS, P = 0.002; OS, P type had lower PFS [hazard ratio (HR) = 3.324, P = 0.001] and OS (HR = 4.318, P type DLBCL counteracted the beneficial effect of rituximab on survival.

  5. Successful treatment of mucosa-associated lymphoid tissue lymphoma in a patient with gastric and rectal lesions with metachronous and ectopic development

    Directory of Open Access Journals (Sweden)

    Hajime Umezu

    2011-04-01

    Full Text Available A 75-year-old female, who had an abnormal stomach x-ray finding, was admitted to the hospital for further examination and therapy. Upper GI endoscopy showed reddish and swollen folds on the greater curvature of the gastric body and a biopsy was of this lesion revealed malignant lymphoma (small cell type or mucosa-associated lymphoid tissue (MALT lymphoma suspected. The patient was infected with Helicobacter pylori (H. pylori, however, in response to the patient’s wishes, a total gastrectomy, omentectomy and splenectomy were performed and the histological diagnosis was gastric MALT lymphoma. Two courses of CHOP therapy (cyclophosphamide (CPM 750 mg/m2/day, day 1, adriamycin (ADM 50 mg/m2/day, day 1, vincristine sulfate (VCR 1.4 mg/m2/day, day 1, prednisolone 100 mg/body, day 1-5 were administered as adjuvant chemotherapy. A colonoscopic examination performed about 4.5 yr after the operation revealed rectal submucosal tumors and the biopsied specimens were diagnosed as malignant lymphoma. A transanal focal resection was performed and the histological diagnosis was metachronous and ectopic development of MALT lymphoma. The histological finding was similar to the gastric lesion. About 4 and 7 yr after the first development of rectal MALT lymphoma, MALT lymphomas developed repeatedly in the rectal lesion, however, these were resected repeatedly and no developmenthas occurred during the past two years. This report presents a very rare case of metachronous and ectopic MALT lymphoma de

  6. Arsenic trioxide synergistically enhances radiation response in human cervical cancer cells through ROS-dependent p38 MAPK and JNK signalling pathway

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Young-Hee; Park, Seung-Moo; Kim, Min-Jeong [Korea Institute of Radiological and Medical Sciences, Seoul (Korea, Republic of)] (and others)

    2006-07-01

    Many factors affect susceptibility of tumor cells to ionizing radiation. Among them intrinsic apoptosis sensitivity or resistancy seems to play an important role. The use of chemical modifiers as radiosensitizers in combination with low-dose irradiation may increase the therapeutic efficacy by overcoming a high apoptotic threshold. Several recent studies demonstrated additive effects of As{sub 2}O{sub 3} with conventional chemotherapeutic agents such as cisplatin, adriamycin, and etoposide, but no synergism. Previously, we have shown for the first time that As{sub 2}O{sub 3} sensitize human cervical cancer cells to ionizing radiation. Treatment of As{sub 2}O{sub 3} in combination of ionizing radiation has synergistic effects in decreasing clonogenic survival and in the regression of tumor growth in xenografts. We also have shown that the combination treatment enhanced apoptotic cell death through a reactive oxygen species-dependent pathway in human cervical cancer cells. In this study, we investigated the regulatory mechanism of ROS-mediated mitochondrial apoptotic cell death induced by combination treatment with As{sub 2}O{sub 3} and ionizing radiation in human cervical cancer cells.

  7. Alveolar rhabdomyosarcoma: origin and prognostic implications of molecular findings.

    Science.gov (United States)

    Eguía-Aguilar, Pilar; López-Martínez, Briceida; Retana-Contreras, Carmen; Perezpeña-Diazconti, Mario

    We present the case of a 2-year-old male patient with a facial tumor partially treated with chemotherapy before his admission to our institution. The tumor involved from the frontal region to the maxillary floor, the orbit, and the maxillary and sphenoid sinuses. The histopathological diagnosis revealed a stage IV alveolar rhabdomyosarcoma with infiltration to bone marrow and cerebrospinal fluid. He was managed with four cycles of adriamycin, actinomycin, cyclophosphamide and vincristine; cisplatin and irinotecan were added to the last cycle. The tumor had a 50% size reduction, but the patient died after a neutropenia and fever episode. The aggressive behavior of alveolar rhabdomyosarcoma has been associated with the expression of oncogenic fusion proteins resulting from chromosomal translocations, particularly t(2;13) (q35;q14) PAX3/FOXO1, and t(1;13) (p36;q14) PAX7/FOXO1 which were present in this patient. Copyright © 2016 Hospital Infantil de México Federico Gómez. Publicado por Masson Doyma México S.A. All rights reserved.

  8. [Effects of SIPL1 screened by suppression subtractive hybridization (SSH) on biological function and drug resistance of renal cell carcinoma cells].

    Science.gov (United States)

    Li, Chun-yan; Yao, An-mei; Chang, Xiao-ning; Guo, Ya-huan; Xu, Rui

    2013-12-01

    To screen the differentially expressed genes in human renal clear-cell carcinoma (RCC) cells using suppression subtractive hybridization (SSH), and to explore their biological function and underlying mechanism in RCC cells. Total RNAs were extracted from human renal clear-cell carcinoma cell line RLC-310 and human normal renal cell line HK-2 cells, and SSH technology was used to construct a RCC cell library of differential expression genes and to screen the most differentially expressed genes. RNA interference vector was constructed to silence the expression of the differentially expressed gene SIPL1 in human renal cell lines RLC-310 and GRC-1. Proliferation index was estimated by cell counting, MTT and tumor xenograft assay. Cell cycle analysis was performed using fluorescence activated cell sorting. Drug resistance potential to adriamycin was assessed by MTT. A subtractive cDNA library of highly expressed genes in the RCC cells was constructed and 12 differentially expressed genes were screened from the subtractive library, in which SIPL1 was the most differently expressed gene in the RCC cell line. SIPL1 overexpression in the RCC cells and clinical samples was confirmed by RT-PCR and Western blot analyses. The shRNA expression plasmid targeting to SIPL1 gene was constructed and transfected into RLC-310 and GRC-1 cells, resulting in downregulation of SIPL1. SIPL1 knockdown inhibited the cell proliferation (P SSH technology. SIPL1 functions as an oncogene in RCC, and may become a novel molecular target for RCC diagnosis and therapy.

  9. Knockdown of HOXA10 reverses the multidrug resistance of human chronic mylogenous leukemia K562/ADM cells by downregulating P-gp and MRP-1.

    Science.gov (United States)

    Yi, Ying-Jie; Jia, Xiu-Hong; Wang, Jian-Yong; Li, You-Jie; Wang, Hong; Xie, Shu-Yang

    2016-05-01

    Multidrug resistance (MDR) of leukemia cells is a major obstacle in chemotherapeutic treatment. The high expression and constitutive activation of P-glycoprotein (P-gp) and multidrug resistance protein-1 (MRP-1) have been reported to play a vital role in enhancing cell resistance to anticancer drugs in many tumors. The present study aimed to investigate the reversal of MDR by silencing homeobox A10 (HOXA10) in adriamycin (ADR)-resistant human chronic myelogenous leukemia (CML) K562/ADM cells by modulating the expression of P-gp and MRP-1. K562/ADM cells were stably transfected with HOXA10-targeted short hairpin RNA (shRNA). The results of reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and western blot analysis showed that the mRNA and protein expression of HOXA10 was markedly suppressed following transfection with a shRNA-containing vector. The sensitivity of the K562/ADM cells to ADR was enhanced by the silencing of HOXA10, due to the increased intracellular accumulation of ADR. The accumulation of ADR induced by the silencing of HOXA10 may be due to the downregulation of P-gp and MRP-1. Western blot analysis revealed that downregulating HOXA10 inhibited the protein expression of P-gp and MRP-1. Taken together, these results suggest that knockdown of HOXA10 combats resistance and that HOXA10 is a potential target for resistant human CML.

  10. Development of an Optimized Protocol for NMR Metabolomics Studies of Human Colon Cancer Cell Lines and First Insight from Testing of the Protocol Using DNA G-Quadruplex Ligands as Novel Anti-Cancer Drugs

    Directory of Open Access Journals (Sweden)

    Ilaria Lauri

    2016-01-01

    Full Text Available The study of cell lines by nuclear magnetic resonance (NMR spectroscopy metabolomics represents a powerful tool to understand how the local metabolism and biochemical pathways are influenced by external or internal stimuli. In particular, the use of adherent mammalian cells is emerging in the metabolomics field in order to understand the molecular mechanism of disease progression or, for example, the cellular response to drug treatments. Hereto metabolomics investigations for this kind of cells have generally been limited to mass spectrometry studies. This study proposes an optimized protocol for the analysis of the endo-metabolome of human colon cancer cells (HCT116 by NMR. The protocol includes experimental conditions such as washing, quenching and extraction. In order to test the proposed protocol, it was applied to an exploratory study of cancer cells with and without treatment by anti-cancer drugs, such as DNA G-quadruplex binders and Adriamycin (a traditional anti-cancer drug. The exploratory NMR metabolomics analysis resulted in NMR assignment of all endo-metabolites that could be detected and provided preliminary insights about the biological behavior of the drugs tested.

  11. Development of an Optimized Protocol for NMR Metabolomics Studies of Human Colon Cancer Cell Lines and First Insight from Testing of the Protocol Using DNA G-Quadruplex Ligands as Novel Anti-Cancer Drugs.

    Science.gov (United States)

    Lauri, Ilaria; Savorani, Francesco; Iaccarino, Nunzia; Zizza, Pasquale; Pavone, Luigi Michele; Novellino, Ettore; Engelsen, Søren Balling; Randazzo, Antonio

    2016-01-15

    The study of cell lines by nuclear magnetic resonance (NMR) spectroscopy metabolomics represents a powerful tool to understand how the local metabolism and biochemical pathways are influenced by external or internal stimuli. In particular, the use of adherent mammalian cells is emerging in the metabolomics field in order to understand the molecular mechanism of disease progression or, for example, the cellular response to drug treatments. Hereto metabolomics investigations for this kind of cells have generally been limited to mass spectrometry studies. This study proposes an optimized protocol for the analysis of the endo-metabolome of human colon cancer cells (HCT116) by NMR. The protocol includes experimental conditions such as washing, quenching and extraction. In order to test the proposed protocol, it was applied to an exploratory study of cancer cells with and without treatment by anti-cancer drugs, such as DNA G-quadruplex binders and Adriamycin (a traditional anti-cancer drug). The exploratory NMR metabolomics analysis resulted in NMR assignment of all endo-metabolites that could be detected and provided preliminary insights about the biological behavior of the drugs tested.

  12. Transformation of Nonfunctioning Pancreatic Neuroendocrine Carcinoma Cells into Insulin Producing Cells after Treatment with Sunitinib

    Directory of Open Access Journals (Sweden)

    Jung Hun Ohn

    2013-06-01

    Full Text Available We report a rare case of severe hypoglycemia after sunitinib treatment for pancreatic neuroendocrine carcinoma. We describe the initial clinical presentation, laboratory results, pathologic findings, and managment in a patient with a nonfunctioning pancreatic neuroendocrine carcinoma with liver metastases who developed life threatening hypoglycemia after 2 months of sunitinib therapy. A 46-year-old woman presented to the emergency department with loss of consciousness from hypoglycemia. Serum C-peptide and insulin levels at fasting state revealed that the hypoglycemia resulted from endogenous hyperinsulinemia. She had been diagnosed with nonfunctioning pancreatic neuroendocrine carcinoma based on a biopsy of metastatic cervical lymph node and was being treated with sunitinib, a small molecule tyrosine kinase inhibitor. Immunohistochemical stain of the metastatic liver mass demonstrated that the initially nonfunctioning neuroendocrine carcinoma cells had changed into insulin-producing cells after sunitinib therapy. Transarterial chemoembolization of the liver masses and systemic chemotherapy with streptozotocin/adriamycin relieved the hypoglycemia. A nonfunctioning pancreatic neuroendocrine carcinoma was transformed into an insulin-producing tumor after treatment with sunitinib, causing endogenous hyperinsulinemia and severe hypoglycemia.

  13. The overexpression of MRP4 is related to multidrug resistance in osteosarcoma cells

    Directory of Open Access Journals (Sweden)

    Zhonghui He

    2015-01-01

    Full Text Available Doxorubicin (Adriamycin, ADM is an antimitotic drug used in the treatment of a wide range of malignant tumors, including acute leukemia, lymphoma, osteosarcoma, breast cancer, and lung cancer. Multidrug resistance-associated proteins (MRPs are members of a superfamily of ATP-binding cassette (ABC transporters, which can transport various molecules across extra- and intra-cellular membranes. The aim of this study was to investigate whether there was a correlation between MRP4 and primary ADM resistance in osteosarcoma cells. In this paper, we chose the human osteosarcoma cell line MG63, ADM resistant cell line MG63/DOX, and the patient′s primary cell GSF-0686. We checked the ADM sensitivity and cytotoxicity of all the three cells by cell proliferation assay. The intracellular drug concentrations were measured by using LC-MS/MS. We also examined MRP4 gene expression by RT-PCR and Western Blot. We found that the intracellular ADM concentration of the parent osteosarcoma cell line MG63 was higher than the ADM resistant osteosarcoma MG63/DOX cell line or the GSF-0686 cell after ADM treatment (P < 0.05. In addition, MRP4 mRNA and protein levels in ADM resistant osteosarcoma cells were higher than in MG63 cell (P < 0.05. Taking together, this work suggests that overexpression of MRP4 may confer ADM resistance in osteosarcoma cells.

  14. Multiplex analysis of tumor multidrug-resistance genes expression with photonic suspension array.

    Science.gov (United States)

    Yang, Zixue; Chen, Baoan; Pei, Xiaoping; Shangguan, Fengqi

    2012-07-21

    An easy-operated suspension array based on silica colloidal crystal beads is developed for multiplex analysis of tumor multidrug-resistance genes expression, such as multidrug resistance 1 (MDR1) and multidrug resistance-associated protein 1 (MRP1), and potentially single nucleotide polymorphism. In order to obtain high fluorescence intensity, controlled PCR was used to amplify targets at the samples pretreatment stage. By optimizing the conditions a hybridization procedure, which is similar to nucleic acids analysis with binary probes, was established. Small amounts of analytes 10(-19) M could be detected by the method. The K562 cell, human myeloma cell, and its multidrug-resistance string, adriamycin-selected P-glycoprotein-overexpressed K562/A02, were analyzed by using an established procedure to validate feasibility. Clinical blood samples were detected by our method and real-time PCR simultaneously to validate accuracy. Moreover, when combined with multiplex controlled PCR, the method successfully meets the requirements of multiplex analysis. Hence, the method presented is a good method for multiplex analysis of tumor multidrug-resistance genes expression.

  15. Referred symptom from myofascial pain syndrome: One of the most important causes of sensory disturbance in breast cancer patients using taxanes.

    Science.gov (United States)

    Ko, E J; Jeon, J Y; Kim, W; Hong, J Y; Yi, Y G

    2017-11-01

    The aim of this retrospective study was to evaluate common causes of upper extremity sensory disturbance in breast cancer patients. Breast cancer patients who received surgery and taxane chemotherapy (CTx) with upper extremity sensory disturbance that began after CTx were included. With comprehensive clinical history, physical examination and electrodiagnostic results, diagnosis for each patient was made. Fifty-two patients were included: 23 (44.2%) were diagnosed with chemotherapy-induced peripheral neuropathy (CIPN), 7 (13.5%) with myofascial pain syndrome (MPS), six (11.5%) with carpal tunnel syndrome (CTS), four (7.7%) with CIPN and MPS, and three (5.8%) with CIPN and CTS. CIPN was more correlated with sensory symptoms at upper and lower extremities, a shorter time from CTx start, and adriamycin and cytoxan (AC) plus paclitaxel, than with AC plus docetaxel and fluorouracil, epirubicin and cyclophosphamide plus taxanes. MPS was correlated with longer duration of CTx and use of hormone therapy. CTS was correlated with wrist trauma history. Patients with CIPN showed similar degrees of pain even after 3 months of treatment, in comparison to the patients with MPS and CTS. When breast cancer patients complain of upper extremity sensory disturbance, various causes, especially referred symptom from MPS, should be considered for effective treatment. © 2016 John Wiley & Sons Ltd.

  16. Cytotoxic impact of phenolics from Lamiaceae species on human breast cancer cells.

    Science.gov (United States)

    Berdowska, Izabela; Zieliński, Bogdan; Fecka, Izabela; Kulbacka, Julita; Saczko, Jolanta; Gamian, Andrzej

    2013-11-15

    The aim of this study was to evaluate the cytotoxicity of dried aqueous extracts from Thymus serpyllum (ExTs), Thymus vulgaris (ExTv), Majorana hortensis (ExMh), and Mentha piperita (ExMp), and the phenolic compounds caffeic acid (CA), rosmarinic acid (RA), lithospermic acid (LA), luteolin-7-O-glucuronide (Lgr), luteolin-7-O-rutinoside (Lr), eriodictiol-7-O-rutinoside (Er), and arbutin (Ab), on two human breast cancer cell lines: Adriamycin-resistant MCF-7/Adr and wild-type MCF-7/wt. In the MTT assay, ExMh showed the highest cytotoxicity, especially against MCF-7/Adr, whereas ExMp was the least toxic; particularly against MCF-7/wt cells. RA and LA exhibited the strongest cytotoxicity against both MCF-7 cell lines, over 2-fold greater than CA and Lgr, around 3-fold greater than Er, and around 4- to 7-fold in comparison with Lr and Ab. Except for Lr and Ab, all other phytochemicals were more toxic against MCF-7/wt, and all extracts exhibited higher toxicity against MCF-7/Adr. It might be concluded that the tested phenolics exhibited more beneficial properties when they were applied in the form of extracts comprising their mixtures. Copyright © 2013 Elsevier Ltd. All rights reserved.

  17. The Protective Effects of Cobra Venom from Naja naja atra on Acute and Chronic Nephropathy

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    Shu-Zhi Wang

    2013-01-01

    Full Text Available This study investigated the effects of Naja naja atra venom (NNAV on acute and chronic nephropathy in rats. Rats received 6 mg/kg adriamycin (ADR once to evoke the chronic nephropathy or 8 ml/kg 50% v/v glycerol to produce acute renal failure (ARF. The NNAV was given orally once a day starting five days prior to ADR or glycerol injection and continued to the end of experiments. The animals were placed in metabolic cages for 24 h for urine collection for urinary protein determination. The kidney function-related biochemical changes and index of oxidative stress were determined with automatic biochemistry analyzer or colorimetric enzyme assay kits. The pathomorphological changes were observed using light and transmission electron microcopies. The levels of inflammatory cytokines and NF-κB activation were determined using ELISA kits, Western blot analysis, or immunofluorescence. The results showed that NNAV relieved ADR-induced chronic nephropathy and glycerol-triggered acute renal failure syndromes including proteinuria, hypoalbuminemia, hyperlipidemia, serum electrolyte unbalance, renal oxidative stress, and pathological damages. NNAV reduced kidney levels of TNF-α and IL-1β, but it increased the levels of IκB-α and inhibited NF-κB p65 nuclear localization. These findings suggest that NNAV may be a valuable therapeutic drug for acute and chronic kidney diseases.

  18. Hyaluronan and calcium carbonate hybrid nanoparticles for colorectal cancer chemotherapy

    Science.gov (United States)

    Bai, Jinghui; Xu, Jian; Zhao, Jian; Zhang, Rui

    2017-09-01

    A hybrid drug delivery system (DDS) composed of hyaluronan and calcium carbonate (CC) was developed. By taking advantage of the tumor-targeting ability of hyaluronan and the drug-loading property of CC, the well-formed hyaluronan-CC nanoparticles were able to serve as a DDS targeting colorectal cancer with a decent drug loading content, which is beneficial in the chemotherapy of colorectal cancer. In this study, hyaluronan-CC nanoparticles smaller than 100 nm were successfully developed to load the wide-range anti-cancer drug adriamycin (Adr) to construct hyaluronan-CC/Adr nanoparticles. On the other hand, we also found that hyaluronan-CC/Adr nanoparticles can possibly increase the uptake ratio of Adr into HT29 colorectal cancer cells when compared with hyaluronan-free nanoparticles (CC/Adr) via the CD44 receptor-mediated endocytosis via competitive uptake and in vivo imaging assays. Note that both in vitro (CCK-8 assay on HT29 cells) and in vivo (anti-cancer assay on HT-29 tumor-bearing nude mice model) experiments revealed that hyaluronan-CC/Adr nanoparticles exhibited stronger anti-cancer activity than free Adr or CC/Adr nanoparticles with minimized toxic side effects and preferable cancer-suppression potential.

  19. CCL21/CCR7 enhances the proliferation, migration, and invasion of human bladder cancer T24 cells.

    Science.gov (United States)

    Mo, Miao; Zhou, Mi; Wang, Lu; Qi, Lin; Zhou, Kehua; Liu, Long-Fei; Chen, Zhi; Zu, Xiong-Bing

    2015-01-01

    To investigate the effects of CCL21/CCR7 on the proliferation, migration, and invasion of T24 cells and the possible associated mechanisms: expression of MMP-2 and MMP-9, and regulation of BCL-2 and BAX proteins. T24 cells received corresponding treatments including vehicle control, antibody (20 ng/mL CCR7 antibody and 50 ng/ml CCL21), and 50, 100, and 200 ng/ml CCL21. Proliferation was evaluated by MTT assay; cell migration and invasion were assayed using a transwell chamber. Cell apoptosis was induced by Adriamycin (ADM). The rate of cell apoptosis was examined by flow cytometry using annexin V-FITC/PI staining. Western-blot was used to analyze MMP-2 and MMP-9 and BCL-2 and BAX proteins. CCL21 promoted T24 cell proliferation in concentration-dependent manner with that 200 ng/mL induced the largest amount of proliferation. Significant differences of cell migration were found between CCL21treatment groups and the control group in both the migration and invasion studies (P T24 cell proliferation and enhanced its migration and invasion via the increased expression of MMP-2 and MMP-9. CCL21/CCR7 had antiapoptotic activities on T24 cells via regulation of Bcl-2 and Bax proteins. CCL21/CCR7 may promote bladder cancer development and metastasis.

  20. Tumor lysis syndrome associated with chemotherapy in primary retroperitoneal soft tissue sarcoma by ex vivo ATP-based tumor chemo-sensitivity assay (ATP-TCA

    Directory of Open Access Journals (Sweden)

    Ke-Qing Qian

    2008-12-01

    Full Text Available Ke-Qing Qian1, Heng Ye1, Yi-Wen Xiao1, Yong-Yi Bao2, Chun-Jian Qi11Department of Oncology; 2Department of Pathology, the Changzhou No. 2 People’s Hospital Affiliated to Nanjing Medical University, Changzhou, ChinaAbstract: Tumor lysis syndrome (TLS, a result of rapid cell lysis following tumor therapy, is a well recognized complication during the treatment of rapidly growing tumors. TLS rarely occurs in solid tumors. We present a case report of TLS in a patient with primary retroperitoneal soft tissue sarcoma. TLS occurred in the patient after four days’ combinational chemotherapy with cisplatin, adriamycin, and dacarbazine. These drugs were selected on the basis of an ex vivo ATP-based tumor sensitivity assay. TLS was properly controlled in the patient with concomitant remission of the sarcoma. Therefore, precautions should be taken to avoid this potentially fatal complication during treatment of solid tumors, especially with tumors highly sensitive to drugs.Keywords: tumor lysis syndrome, retroperitoneal soft tissue sarcoma, ATP-based tumor sensitivity assay (ATP-TCA

  1. Primitive neuroectodermal tumor of adrenal: Clinical presentation and outcomes

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    Deep Dutta

    2013-01-01

    Full Text Available Primitive neuroectodermal tumor (PNET of adrenal is an extremely rare tumor of neural crest origin. A nonfunctional left adrenal mass (14.6 × 10.5 × 10.0 cm on computed tomography (CT was detected in a 40-year-old lady with abdominal pain, swelling, and left pleural effusion. She underwent left adrenalectomy and left nephrectomy with retroperitoneal resection. Histopathology revealed sheets and nest of oval tumor cells with hyperchromatic nuclei, prominent nucleoli, scanty cytoplasm, brisk mitotic activity, necrosis, lymphovascular invasion, capsular invasion, and extension to the surrounding muscles; staining positive for Mic-2 (CD-99 antigen, vimentin, synaptophysin, and Melan-A. Thoracocentesis, pleural fluid study, and pleural biopsy did not show metastasis. She responded well to vincristine, adriamycin, and cyclophosphamide followed by ifosfamide and etoposide (IE. This is the first report of adrenal peripheral PNET (pPNET from India. This report intends to highlight that pPNET should be suspected in a patient presenting with huge nonfunctional adrenal mass which may be confused with adrenocortical carcinoma.

  2. A novel in vivo method to quantify slit diaphragm protein abundance in murine proteinuric kidney disease.

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    Raphael Haase

    Full Text Available Injury of the glomerular filter causes proteinuria by disrupting the sensitive interplay of the glomerular protein network. To date, studies of the expression and trafficking of glomerular proteins have been mostly limited to in vitro or histologic studies. Here, we report a novel in vivo biotinylation assay that allows the quantification of surface expression of glomerular proteins in mice. Kidneys were perfused in situ with biotin before harvest. Afterwards glomeruli were isolated and lyzed. The protein of interest was separated by immunoprecipitation and the amount of surface-expressed protein was quantified by Western blot analysis with streptavidin staining. As proof-of-concept, we examined the presence of nephrin in the slit diaphragm in two well-established murine models of proteinuric kidney disease: nephrotoxic nephritis and adriamycin nephropathy. In proteinuric animals, significantly less nephrin was detected in the slit diaphragm. When proteinuria decreased once again during the course of disease, the amount of surface nephrin returned to the baseline. Our present results suggest that our assay is a valuable tool to study the glomerular filter in proteinuric kidney diseases. Note that the assay is not limited to proteins expressed in the slit diaphragm, and all surface proteins that are accessible to biotin perfusion and immunoprecipitation qualify for this analysis.

  3. Primary lymphoma of the liver treated by extended hepatectomy and chemotherapy: a case report Linfoma primário do fígado tratado por hepatectomia ampliada e quimioterapia: relato de caso

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    Eleazar Chaib

    2002-09-01

    Full Text Available Primary lymphoma of the liver is an extremely rare entity. A case of anaplastic large B-cell (both CD-20 and lambda positive non-Hodgkin's lymphoma that was confined to the liver in a 33-year-old man is reported. The patient was treated with an extended right hepatectomy and combination chemotherapy: cyclophosphamide, adriamycin, vincristine, and prednisone. The patient was disease free 24 months after the procedure.O linfoma primário do fígado é uma entidade extremamente rara. Os autores relatam um caso de linfoma não-Hodgkin de células B grandes anaplásicas (positivo para CD-20 e Lambda em um paciente do sexo masculino de 33 anos. O tumor estava localizado no lobo hepático direito e foi tratado por hepatectomia direita ampliada e quimioterapia pós-operatória com ciclofosfamida, adriamicina, vincristina e prednisone. Vinte quatro meses de seguimento o paciente encontra-se sem recidiva tumoral.

  4. Investigating the pharmacodynamic and magnetic properties of pyrophosphate-bridged coordination complexes

    Science.gov (United States)

    Ikotun, Oluwatayo (Tayo) F.

    The multidentate nature of pyrophosphate makes it an attractive ligand for complexation of metal cations. The participation of pyrophosphate in a variety of biological pathways and its metal catalyzed hydrolysis has driven our investigation into its coordination chemistry. We have successfully synthesized a library of binuclear pyrophosphate bridge coordination complexes. The problem of pyrophosphate hydrolysis to phosphate in the presence of divalent metal ions was overcome by incorporating capping ligands such as 1,10-phenanthroline and 2,2'-bipyridine prior to the addition of the pyrophosphate. The magnetic properties of these complexes was investigated and magneto-structural analysis was conducted. The biological abundance of pyrophosphate and the success of metal based drugs such as cisplatin, prompted our investigation of the cytotoxic properties of M(II) pyrophosphate dimeric complexes (where M(II) is CoII, CuII, and NiII) in adriamycin resistant human ovarian cancer cells. Thess compounds were found to exhibit toxicity in the nanomolar to picomolar range. We conducted in vitro stability studies and the mechanism of cytoxicity was elucidated by performing DNA mobility and binding assays, enzyme inhibition assays, and in vitro oxidative stress studies.

  5. Diagnóstico pouco usual de obstrução da traqueia

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    C. Damas

    2006-05-01

    Full Text Available Resumo: Homem, 54 anos, caucasiano e fumador, que recorreu ao serviço de urgência por apresentar tosse produtiva e expectoração hemoptóica desde há cerca de dois meses, motivo porque foi agendada broncofibroscopia. Apresentava neoformações sésseis, cerca de 2 cm abaixo das cordas vocais e ao longo da vertente póstero-lateral do terço médio da traqueia, que condicionavam obstrução significativa, motivo pelo qual foi realizada broncoscopia rígida para colocação de prótese endotraqueal.Dada a instabilidade clínica e grande suspeição de malignidade o doente inicia radioterapia. O diagnóstico obtido foi de linfoma anaplásico de células grandes, CD 30+. Por insuficiência respiratória, com estridor, foi necessário retirar a prótese que se encontrava obstruída por um rolhão de secreções, ficando a traqueia patente.O doente teve alta, estando actualmente estabilizado do ponto de vista respiratório e submetido a quimioterapia com CHOP (Ciclophosphamide, Adriamycin or Hydroxydorubicin, Vincristine or Oncovin and Prednisone.O linfoma de grandes células primário do mediastino corresponde a 11.5% dos linfomas de grandes células (2% dos linfomas não Hodgkin. Apesar da maioria dos estudos o classificarem como incurável, há registos de resultados positivos com o recurso à irradiação mediastínica combinada com quimioterapia podendo, quando existe compromisso da via aérea, a colocação de uma prótese permitir a patência da mesma.Rev Port Pneumol 2006; XII (3: 303-308 Abstract: Male, 54 years old, with smoking habits. The patient complaints were cough, with bleeding secretions in the previous two months. Because of the persistence of the symptoms, a broncoscopy was proposed. This exam showed multiple lesions in the traquea, nearly 2 cm above the vocal cords that compromised the airway and did not allow the progression

  6. Unusual diagnosis of traqueal obstrution

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    C. Damas

    2006-05-01

    Full Text Available Male, 54 years old, with smoking habits. The patient complaints were cough, with bleeding secretions in the previous two months. Because of the persistence of the symptoms, a broncoscopy was proposed. This exam showed multiple lesions in the traquea, nearly 2 cm above the vocal cords that compromised the airway and did not allow the progression of the bronchoscope. For this reason, it was decided to introduce a tracheal prosthesis. Because of instability, and the suspicion of malignancy we started thoracic irradiation. The histological specimen was compatible with anaplastic Lymphoma, CD 30+.Because of respiratory distress, with stridor, the prothesis was removed. The traquea was permeable after this.The patient was discharged and oriented to Clinical Haematology. He is clinically stable and under monitoring, having now completed a chemotherapy treatment with CHOP (Ciclophosphamide, Adriamycin or Hydroxydorubicin, Vincristine or Oncovin and Prednisone.The primary mediastinal Large Cells Lymphoma represents 11.5% of the Large Cells Lymphomas (2% of the non-Hodgkin's Lymphomas. This neoplasm is in many studies considered incurable, but there are some positive results with the combination of radiotheraphy and chemotherapy. If there is any airway compromise, the tracheal prosthesis may be one option for the resolution of the respiratory insufficiency. Resumo: Homem, 54 anos, caucasiano e fumador, que recorreu ao serviço de urgência por apresentar tosse produtiva e expectoração hemoptóica desde há cerca de dois meses, motivo porque foi agendada broncofibroscopia. Apresentava neoformações sésseis, cerca de 2 cm abaixo das cordas vocais e ao longo da vertente póstero-lateral do terço médio da traqueia, que condicionavam obstrução significativa, motivo pelo qual foi realizada broncoscopia rígida para colocação de prótese endotraqueal.Dada a instabilidade clínica e grande suspeição de malignidade o doente inicia radioterapia. O

  7. In vivo multimodality imaging of miRNA-16 iron nanoparticle reversing drug resistance to chemotherapy in a mouse gastric cancer model

    Science.gov (United States)

    Sun, Zhongchan; Song, Xinxing; Li, Xiujuan; Su, Tao; Qi, Shun; Qiao, Ruirui; Wang, Fu; Huan, Yi; Yang, Weidong; Wang, Jing; Nie, Yongzhan; Wu, Kaichun; Gao, Mingyuan; Cao, Feng

    2014-11-01

    miRNA-16 (miR16) plays an important role in modulating the drug resistance of SGC7901 cell lines to adriamycin (ADR). A variety of viral carriers have been designed for miRNA delivery. However, the safety concerns are currently perceived as hampering the clinical application of viral vector-based therapy. Herein a type of magnetic nanoparticles (MNPs) was designed and synthesized using poly(ethylene glycol) (PEG)-coated Fe3O4 nanoparticles as a miRNA delivery system for the purpose of reducing drug resistance of gastric cancer cells by enforcing miR16 expression in SGC7901/ADR cells. The MNPs with good biocompatibility were synthesized by thermal decomposition, and then conjugated with miRNA via electrostatic interaction producing miR16/MNPs. After co-culture with miR16/MNPs, ADR-induced apoptosis of SGC7901/ADR was examined by MTT and TUNEL. miR16/MNPs treatment significantly increased cell apoptosis in vitro. SGC7901/ADRfluc tumor-bearing nude mice under ADR therapy were treated with miR16/MNPs by tail vein injection for in vivo study. After intraperitoneal injection of ADR, tumor volume measurement and fluorescence imaging were performed to for the death of SGC7901/ADR cells in vivo. Results showed that miR16/MNPs were able to significantly suppress SGC7901/ADR tumor growth, probably through increasing SGC7901/ADR cells' sensitivity to ADR. Our results suggest the efficient delivery of miR16 by MNPs as a novel therapeutic strategy for drug resistant tumor treatment.miRNA-16 (miR16) plays an important role in modulating the drug resistance of SGC7901 cell lines to adriamycin (ADR). A variety of viral carriers have been designed for miRNA delivery. However, the safety concerns are currently perceived as hampering the clinical application of viral vector-based therapy. Herein a type of magnetic nanoparticles (MNPs) was designed and synthesized using poly(ethylene glycol) (PEG)-coated Fe3O4 nanoparticles as a miRNA delivery system for the purpose of reducing drug

  8. Diagnóstico pouco usual de obstrução da traqueia Unusual diagnosis of traqueal obstrution

    Directory of Open Access Journals (Sweden)

    C Damas

    2006-05-01

    Full Text Available Homem, 54 anos, caucasiano e fumador, que recorreu ao serviço de urgência por apresentar tosse produtiva e expectoração hemoptóica desde há cerca de dois meses, motivo porque foi agendada broncofibroscopia. Apresentava neoformações sésseis, cerca de 2 cm abaixo das cordas vocais e ao longo da vertente póstero-lateral do terço médio da traqueia, que condicionavam obstrução significativa, motivo pelo qual foi realizada broncoscopia rígida para colocação de prótese endo-traqueal. Dada a instabilidade clínica e grande suspeição de malignidade o doente inicia radioterapia. O diagnóstico obtido foi de linfoma anaplásico de células grandes, CD 30+. Por insuficiência respiratória, com estridor, foi necessário retirar a prótese que se encontrava obstruída por um rolhão de secreções, ficando a traqueia patente. O doente teve alta, estando actualmente estabilizado do ponto de vista respiratório e submetido a quimioterapia com CHOP (Ciclophosphamide, Adriamycin or Hydroxydorubicin, Vincristine or Oncovin and Prednisone. O linfoma de grandes células primário do mediastino corresponde a 11.5% dos linfomas de grandes células (2% dos linfomas não Hodgkin. Apesar da maioria dos estudos o classificarem como incurável, há registos de resultados positivos com o recurso à irradiação mediastínica combinada com quimioterapia podendo, quando existe compromisso da via aérea, a colocação de uma prótese permitir a patência da mesma.Male, 54 years old, with smoking habits. The patient complaints were cough, with bleeding secretions in the previous two months. Because of the persistence of the symptoms, a broncoscopy was proposed. This exam showed multiple lesions in the traquea, nearly 2 cm above the vocal cords that compromised the airway and did not allow the progression of the bronchoscope. For this reason, it was decided to introduce a tracheal prosthesis. Because of instability and the suspicion of malignancy we started

  9. (Pro)renin Receptor Is an Amplifier of Wnt/β-Catenin Signaling in Kidney Injury and Fibrosis.

    Science.gov (United States)

    Li, Zhen; Zhou, Lili; Wang, Yongping; Miao, Jinhua; Hong, Xue; Hou, Fan Fan; Liu, Youhua

    2017-08-01

    The (pro)renin receptor (PRR) is a transmembrane protein with multiple functions. However, its regulation and role in the pathogenesis of CKD remain poorly defined. Here, we report that PRR is a downstream target and an essential component of Wnt/β-catenin signaling. In mouse models, induction of CKD by ischemia-reperfusion injury (IRI), adriamycin, or angiotensin II infusion upregulated PRR expression in kidney tubular epithelium. Immunohistochemical staining of kidney biopsy specimens also revealed induction of renal PRR in human CKD. Overexpression of either Wnt1 or β-catenin induced PRR mRNA and protein expression in vitro Notably, forced expression of PRR potentiated Wnt1-mediated β-catenin activation and augmented the expression of downstream targets such as fibronectin, plasminogen activator inhibitor 1, and α-smooth muscle actin (α-SMA). Conversely, knockdown of PRR by siRNA abolished β-catenin activation. PRR potentiation of Wnt/β-catenin signaling did not require renin, but required vacuolar H+ ATPase activity. In the mouse model of IRI, transfection with PRR or Wnt1 expression vectors promoted β-catenin activation, aggravated kidney dysfunction, and worsened renal inflammation and fibrotic lesions. Coexpression of PRR and Wnt1 had a synergistic effect. In contrast, knockdown of PRR expression ameliorated kidney injury and fibrosis after IRI. These results indicate that PRR is both a downstream target and a crucial element in Wnt signal transmission. We conclude that PRR can promote kidney injury and fibrosis by amplifying Wnt/β-catenin signaling. Copyright © 2017 by the American Society of Nephrology.

  10. Neoadjuvant Chemoradiotherapy for Patients with High-Risk Extremity and Truncal Sarcomas: A 10-year Single Institution Retrospective Study

    Science.gov (United States)

    Look Hong, Nicole J.; Hornicek, Francis J.; Harmon, David. C.; Choy, Edwin; Lin Chen, Yen; Yoon, Sam S.; Nielsen, G. Petur; Szymonifka, Jackie; Yeap, Beow Y.; DeLaney, Thomas F.; Mullen, John T.

    2013-01-01

    Background Patients with large, high-grade extremity and truncal soft tissue sarcomas (STS) are at considerable risk for recurrence. A regimen of preoperative chemotherapy consisting of mesna, adriamycin, ifosfamide, and dacarbazine (MAID), interdigitated with radiotherapy (RT), followed by resection and postoperative chemotherapy with or without RT, has demonstrated high rates of local and distant control. The goal of this study is to assess outcomes in a recent cohort of patients treated on this regimen. Methods We retrospectively reviewed records of 66 consecutive patients with STS of the extremity or trunk who were treated with the aforementioned regimen from May 2000–April 2011. Clinicopathologic characteristics and patient outcomes were analyzed. Results Sixty-six patients were analyzed and were equally divided between grade 2 and 3 tumors. Margins were negative in 57 (89%) patients and positive in 7 (11%) patients. At a median follow-up of 46 months, there were 6 (9%) locoregional and 20 (30%) distant recurrences. The locoregional and distant 5-year recurrence-free survival (RFS) rates were 91% and 64%, respectively. The 5-year overall (OS) and disease-specific survival rates were 86% and 89%, respectively. There were no treatment-related deaths or secondary myelodysplasias. Thirty-four (52%) patients had grade 3 or 4 acute hematologic chemotherapy-related toxicity. There were no statistically significant predictors of OS or RFS. Conclusions For a contemporary cohort of patients with high-risk extremity and truncal STS, a regimen of neoadjuvant chemoradiotherapy and surgery continues to result in high rates of survival with tolerable short- and long-term toxicity. PMID:23092789

  11. Intrahepatic chemoembolization in unresectable pediatric liver malignancies

    Energy Technology Data Exchange (ETDEWEB)

    Arcement, C.M.; Towbin, R.B.; Meza, M.P.; Kaye, R.D.; Carr, B.I. [Department of Radiology, Children' s Hospital of Pittsburgh, PA (United States); Gerber, D.A.; Mazariegos, G.V.; Reyes, J. [Department of Transplant Surgery, Children' s Hospital of Pittsburgh, PA (United States)

    2000-11-01

    Objective. To determine the effectiveness of a new miltidisciplinary approach using neoadjuvant intrahepatic chemoembolization (IHCE) and liver transplant (OLTx) in patients with unresectable hepatic tumors who have failed systemic chemotherapy. Materials and methods. From November 1989 to April 1998, 14 children (2-15 years old) were treated with 50 courses of intra-arterial chemotherapy. Baseline and post-treatment contrast-enhanced CT and alpha-fetoprotein levels were performed. Seven had hepatoblastoma, and 7 had hepatocellular carcinoma (1 fibrolamellar variant). All patients had subselective hepatic angiography and infusion of cisplatin and/or adriamycin (36 courses were followed by gelfoam embolization). The procedure was repeated every 3-4 weeks based on hepatic function and patency of the hepatic artery. Results. Six of 14 children received orthotopic liver transplants (31 courses of IHC). Pretransplant, 3 of 6 showed a significant decrease in alpha-fetoprotein, while only 1 demonstrated a significant further reduction in tumor size. Three of 6 patients are disease free at this time. Three of 6 patients died of metastatic tumor 6, 38, and 58 months, respectively post-transplant. One of 14 is currently undergoing treatment, has demonstrated a positive response, and is awaiting OLTx. Three of 14 withdrew from the program and died. Four of 14 patients developed an increase in tumor size, developed metastatic disease, and were not transplant candidates. Two hepatic arteries thrombosed, and one child had a small sealed-off gastric ulcer as complications of intrahepatic chemoembolization. Conclusion. The results of intrahepatic chemoembolization are promising and suggest that some children who do not respond to systemic therapy can be eventually cured by a combination of intrahepatic chemoembolization orthotopic liver transplant. Alpha-fetoprotein and cross-sectional imaging appear to be complementary in evaluating tumor response. IHCE does not appear to convert

  12. Bypassing multidrug resistant ovarian cancer using ultrasound responsive doxorubicin/curcumin co-deliver alginate nanodroplets.

    Science.gov (United States)

    Baghbani, Fatemeh; Moztarzadeh, Fathollah

    2017-05-01

    Ultrasound-responsive perfluorocarbon nanoemulsions are a class of new multifunctional smart nanocarriers which combine diagnostic properties with therapeutic properties and release their drug payload in a controlled manner in response to ultrasound. Therefore, combination therapy using chemotherapeutic and chemosensitizing agents co-entrapped in these nanocarriers seems beneficial for cancer treatment. In the present study, multifunctional smart alginate/perfluorohexane nanodroplets were developed for co-delivery of doxorubicin and curcumin (a strong chemosensitizer). The nanodroplets with the average particle size of 55.1nm were synthesized via nanoemulsion process. The entrapment efficiency of doxorubicin was 92.3%. To improve curcumin entrapment into the alginate shell, Span 60 was added to the formulation as a co-surfactant and finally curcumin entrapment of about 40% was achieved. Ultrasound-mediated drug release kinetic was evaluated at two different frequencies of 28kHz (low frequency) and 1MHz (high frequency). Low frequency ultrasound resulted in higher triggered drug release from nanodroplets. The nanodroplets showed strong ultrasound contrast via droplet to bubble transition as confirmed via B-mode ultrasound imaging. Enhanced cytotoxicity in adriamycin-resistant A2780 ovarian cancer cells was observed for Dox-Cur-NDs compared to Dox-NDs because of the synergistic effects of doxorubicin and curcumin. However, ultrasound irradiation significantly increased the cytotoxicity of Dox-Cur-NDs. Finally, in vivo ovarian cancer treatment using Dox/Cur-NDs combined with ultrasound irradiation resulted in efficient tumor regression. According to the present study, nanotherapy of multidrug resistant human ovarian cancer using ultrasound responsive doxorubicin/curcumin co-loaded alginate-shelled nanodroplets combined with ultrasound irradiation could be a promising modality for the future of cancer treatment. Copyright © 2017 Elsevier B.V. All rights reserved.

  13. Sulforaphane reduces molecular response to hypoxia in ovarian tumor cells independently of their resistance to chemotherapy.

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    Pastorek, Michal; Simko, Veronika; Takacova, Martina; Barathova, Monika; Bartosova, Maria; Hunakova, Luba; Sedlakova, Olga; Hudecova, Sona; Krizanova, Olga; Dequiedt, Franck; Pastorekova, Silvia; Sedlak, Jan

    2015-07-01

    One of the recently emerging anticancer strategies is the use of natural dietary compounds, such as sulforaphane, a cancer-chemopreventive isothiocyanate found in broccoli. Based on the growing evidence, sulforaphane acts through molecular mechanisms that interfere with multiple oncogenic pathways in diverse tumor cell types. Herein, we investigated the anticancer effects of bioavailable concentrations of sulforaphane in ovarian carcinoma cell line A2780 and its two derivatives, adriamycin-resistant A2780/ADR and cisplatin-resistant A2780/CP cell lines. Since tumor microenvironment is characterized by reduced oxygenation that induces aggressive tumor phenotype (such as increased invasiveness and resistance to chemotherapy), we evaluated the effects of sulforaphane in ovarian cancer cells exposed to hypoxia (2% O2). Using the cell-based reporter assay, we identified several oncogenic pathways modulated by sulforaphane in hypoxia by activating anticancer responses (p53, ARE, IRF-1, Pax-6 and XRE) and suppressing responses supporting tumor progression (AP-1 and HIF-1). We further showed that sulforaphane decreases the level of HIF-1α protein without affecting its transcription and stability. It can also diminish transcription and protein level of the HIF-1 target, CA IX, which protects tumor cells from hypoxia-induced pH imbalance and facilitates their migration/invasion. Accordingly, sulforaphane treatment leads to diminished pH regulation and reduced migration of ovarian carcinoma cells. These effects occur in all three ovarian cell lines suggesting that sulforaphane can overcome the chemoresistance of cancer cells. This offers a path potentially exploitable in sensitizing resistant cancer cells to therapy, and opens a window for the combined treatments of sulforaphane either with conventional chemotherapy, natural compounds, or with other small molecules.

  14. Secondary cutaneous Epstein-Barr virus-associated diffuse large B-cell lymphoma in a patient with angioimmunoblastic T-cell lymphoma: a case report and review of literature

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    Yang Qing-Xu

    2012-01-01

    Full Text Available Abstract Only a few cases of extranodal Epstein-Barr virus (EBV-associated B-cell lymphomas arising from patients with angioimmunoblastic T-cell lymphoma (AITL have been described. We report a case of AITL of which secondary cutaneous EBV-associated diffuse large B-cell lymphoma (DLBCL developed after the initial diagnosis of AITL. A 65-year-old Chinese male patient was diagnosed as AITL based on typical histological and immunohistochemical characteristics in biopsy of the enlarged right inguinal lymph nodes. The patient initially received 6 cycles of chemotherapy with CHOP regimen (cyclophosphamide, vincristine, adriamycin, prednisone, but his symptoms did not disappear. Nineteen months after initial diagnosis of AITL, the patient was hospitalized again because of multiple plaques and nodules on the skin. The skin biopsy was performed, but this time the tumor was composed of large, polymorphous population of lymphocytes with CD20 and CD79a positive on immunohistochemical staining. The tumor cells were strong positive for EBER by in situ hybridization. The findings of skin biopsy were compatible with EBV-associated DLBCL. CHOP-R chemotherapy (cyclophosphamide, doxorubicin, vincristine, prednisone and rituximab was then administered, resulting in partial response of the disease with pancytopenia and suppression of cellular immunity. To our knowledge, this is the first case of cutaneous EBV-associated DLBCL originated from AITL in Chinese pepole. We suggest the patients with AITL should perform lymph node and skin biopsies regularly in the course of the disease to detect the progression of secondary lymphomas. Virtual slides The virtual slide(s for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/1197421158639299

  15. Microwave-Assisted Facile Synthesis, Anticancer Evaluation and Docking Study of N-((5-(Substituted methylene amino-1,3,4-thiadiazol-2-ylmethyl Benzamide Derivatives

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    Shailee V. Tiwari

    2017-06-01

    Full Text Available In the present work, 12 novel Schiff’s bases containing a thiadiazole scaffold and benzamide groups coupled through appropriate pharmacophore were synthesized. These moieties are associated with important biological properties. A facile, solvent-free synthesis of a series of novel 7(a–l N-((5-(substituted methylene amino-1,3,4-thiadiazol-2-ylmethyl benzamide was carried out under microwave irradiation. Structures of the synthesized compounds were confirmed by IR, NMR, mass spectral study and elemental analysis. All the synthesized hybrids were evaluated for their in vitro anticancer activity against a panel of four human cancer cell lines, viz. SK-MEL-2 (melanoma, HL-60 (leukemia, HeLa (cervical cancer, MCF-7 (breast cancer and normal breast epithelial cell (MCF-10A using 3-(4,5-dimethythiazol-2-yl-2,5-diphenyl tetrazolium bromide (MTT assay method. Most of the synthesized compounds exhibited promising anticancer activity, showed comparable GI50 values comparable to that of the standard drug Adriamycin. The compounds 7k, 7l, 7b, and 7a were found to be the most promising anticancer agents in this study. A molecular docking study was performed to predict the probable mechanism of action and computational study of the synthesized compounds 7(a–l was performed to predict absorption, distribution, metabolism, excretion and toxicity (ADMET properties, by using QikProp v3.5 (Schrödinger LLC. The results showed the good oral drug-like behavior of the synthesized compounds 7(a–l.

  16. Sodium restriction potentiates the renoprotective effects of combined vitamin D receptor activation and angiotensin-converting enzyme inhibition in established proteinuric nephropathy.

    Science.gov (United States)

    Mirkovic, Katarina; Frenay, Anne-Roos S; van den Born, Jacob; van Goor, Harry; Navis, Gerjan; de Borst, Martin H

    2017-08-01

    Renin-angiotensin-aldosterone system (RAAS) blockade provides renoprotective effects in chronic kidney disease (CKD); yet progressive renal function loss remains common. Dietary sodium restriction potentiates the renoprotective effects of RAAS blockade. Vitamin D receptor activator (VDRA) treatment reduces proteinuria, inflammation and fibrosis, but whether these effects depend on sodium intake has not been studied. We hypothesized that the renoprotective effects of VDRA treatment, with or without RAAS blockade, are modulated by sodium intake. Six weeks after the induction of adriamycin nephrosis in Wistar rats, i.e. with established proteinuria, animals were treated with the VDRA paricalcitol, lisinopril, the combination, or vehicle; each treatment was given during either a high- (2% NaCl) or a low-sodium (0.05% NaCl) diet for 6 weeks. We assessed proteinuria, blood pressure, renal macrophage accumulation and renal expression of the pre-fibrotic marker alpha-smooth muscle actin (α-SMA) at the end of the treatment. Both paricalcitol and lisinopril individually, as well as in combination, reduced proteinuria and glomerular and interstitial inflammation during a low-sodium diet, but not during a high-sodium diet. All interventions also reduced focal glomerulosclerosis and interstitial expression of α-SMA during the low-sodium diet, while similar trends were observed during the high-sodium diet. The renoprotective effects of paricalcitol were not accompanied by blood pressure reduction. As proteinuria was already abolished by lisinopril during the low-sodium diet, the addition of paricalcitol had no further effect on proteinuria or downstream inflammatory or pre-fibrotic changes. The renoprotective effects of the VDRA paricalcitol are blood pressure independent but do depend on dietary sodium status. The combination of RAAS blockade, dietary sodium restriction and VDRA may be a promising intervention to further retard renal function loss in CKD.

  17. It is not only the empty vials that go into the garbage can during chemotherapy drugs preparation: a cost analysis of unused chemotherapy drugs in cancer treatment.

    Science.gov (United States)

    Ata, A; Abali, H; Yengel, E; Arican, A

    2012-01-01

    Cancer therapy is a costly treatment. Costs of drugs used in cancer therapy are gradually increasing with the addition of new and expensive drugs. This fact imposes obligation on reasonable drug usage. Occasionally, all of the prescribed drugs are not used for various reasons, and a number of drugs can be left over. In this study, we aimed to calculate the costs of unused chemotherapeutic drugs in our oncology clinics. A total of 117 patients with 17 different types of cancer were administered 32 cancer therapy protocols during 2 months. After administration of ideal doses of the prescribed drugs calculated on an individual basis, the number of unused drug doses in the packages was recorded and the costs of the unused drugs were calculated based on current prices of the drugs. The cumulative cost of the unused drugs calculated for all patients was US dollars (USD) 6406.93, and average cost of the drug per capita was USD 54.76. Minimal and maximal unused drug costs per drug were USD 0.29 for 5-fluorouracil, and USD 247.12 for bevacizumab, respectively. Minimal increase in drug costs per recipe was USD 0.50 for a prescription containing cyclophosphamide and 5-fluorouracil, while the total cost of bevacizumab plus irinotecan combination increased tremendously to USD 309.12. Among chemotherapeutic protocols the cheapest one was AC (adriamycin, cyclophosphamide) with USD 4.77, while the most expensive one (USD 116.02) was FOLFIRI-B (5-fluorouracil, calcium folinate, irinotecan, and bevacizumab). The important financial burden of unused drugs goes unrecognized among routine chemotherapeutic applications. In order to be able to avoid this extravagance, drug industry, prescribing physicians, and practice nurses must assume important roles.

  18. Bendamustine in the treatment of non-Hodgkin’s lymphomas

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    Fredrick Hagemeister

    2009-12-01

    Full Text Available Fredrick Hagemeister1, George Manoukian21Department of Lymphoma/Myeloma, The University of Texas M.D. Anderson Cancer Center Houston, TX, USA; 2Department of Internal Medicine, The University of Texas Health Science Center, Houston, TX, USAPurpose: To review available data using bendamustine alone and in combination with other chemotherapeutic agents in treatment of patients with non-Hodgkin’s lymphomas.Methods: Internet database searches and literature review.Results: Bendamustine was approved in March 2008 by the United States Food and Drug Administration for the treatment of patients with chronic lymphocytic leukemia. Many trials have been performed over the last decade using bendamustine not only as monotherapy, but also in combination with other agents including rituximab, vincristine, mitoxantrone, fludarabine, and other agents as therapy for patients with relapsed non-Hodgkin’s lymphomas, and recently was approved for use in therapy of patients with relapsed indolent lymphomas considered refractory to rituximab therapy. As monotherapy, bendamustine induces good responses with only minor side effects. In combination with other agents, efficacy improves, especially when given in combination with rituximab. The drug has also been studied in combination with rituximab as initial therapy for indolent lymphomas, and has excellent activity with less toxicity than R-CHOP (rituximab – cyclophosphamide, hydroxydaunorubicin [Adriamycin], Oncovin [vincristine], and prednisone/prednisolone.Conclusion: Overall, bendamustine has demonstrated promising results as therapy for non-Hodgkin’s lymphomas and should be included in the armamentarium of agents used to treat relapsed indolent non-Hodgkin’s lymphomas and may prove valuable as initial therapy for these diseases. Further studies are being conducted to demonstrate the efficacy of this drug in combination with other agents.Keywords: bendamustine, non-Hodgkin’s lymphomas, relapsed lymphoma

  19. Bone metastasis from malignant phyllodes breast tumor: report of two cases.

    Science.gov (United States)

    El Ochi, Mohamed Reda; Toreis, Mehdi; Benchekroun, Mohamed; Benkerroum, Zineb; Allaoui, Mohamed; Ichou, Mohamed; El Khannoussi, Basma; Albouzidi, Abderrahman; Oukabli, Mohamed

    2016-01-01

    Phyllodes tumors are rare fibroepithelial tumors accounting for less than 1 % of all breast neoplasms. They are malignant in 20 % of cases. Only a few cases of malignant phyllodes tumors metastatic to bone have been reported. Case 1: A 40 year-old white woman presented with three-week history of pain and functional impairment of the left lower limb. Her clinical past was remarkable for previous left mastectomy and radiotherapy for malignant phyllodes tumor performed one year ago. Computed tomography revealed a moth-eaten appearance of the left femoral head. The patient underwent computed guided femoral head biopsy. Pathological findings were consistent with metastatic malignant phyllodes tumor. The patient received ifosfamide and adriamycin chemotherapy. She is doing well without any evidence of progression on her imaging follow- up after 8 months. Case 2: A 48 year-old white woman, with history of bilateral mastectomy and radiotherapy for malignant phyllodes tumor performed one and two year ago, presented with four-week left lower quadrant abdominal pain. Computed tomography and magnetic resonance imaging revealed a solid aggressive osteolytic mass of the left iliac bone with extensive soft tissue invasion. Biopsy of the tumor was performed and showed a sarcomatous proliferation consistent with metastatic malignant phyllodes tumor. The patient received the same chemotherapy regimen as in the first case but without any response on her imaging follow up after 6 months. Malignant phyllodes tumor is a rare and aggressive fibroepithelial neoplasm. An accurate diagnosis of metastases should be based on clinicopathological correlation allowing exclusion of differential diagnoses. The goal of successful managing this tumor is early detection and complete resection prior to dissemination.

  20. Anti-TGF-β Antibody, 1D11, Ameliorates Glomerular Fibrosis in Mouse Models after the Onset of Proteinuria.

    Science.gov (United States)

    Liang, Xiaoyan; Schnaper, H William; Matsusaka, Taiji; Pastan, Ira; Ledbetter, Steve; Hayashida, Tomoko

    2016-01-01

    Fibrosis is a final common pathway leading to loss of kidney function, in which the fibrogenic cytokine, transforming growth factor β (TGF-β), plays a central role. While previous studies showed that TGF-β antagonism by various means prevents fibrosis in mouse models, clinical approaches based on these findings remain elusive. 1D11 is a neutralizing antibody to all three isoforms of TGF-β. In both adriamycin (ADR)-induced nephropathy and NEP25 podocyte ablation nephropathy, thrice-weekly intraperitoneal administration of 1D11 from the day of disease induction until the mice were sacrificed (day 14 for ADR and day 28 for NEP25), significantly reduced glomerular COL1A2 mRNA accumulation and histological changes. Consistent with our previous findings, proteinuria remained overt in the mice treated with 1D11, suggesting distinct mechanisms for proteinuria and fibrogenesis. Podocyte numbers determined by WT1 staining were significantly reduced in NEP25-model glomeruli as expected, while WT1-positive cells were preserved in mice receiving 1D11. Even when 1D11 was administered after the onset of proteinuria on day 3, 1D11 preserved WT1-positive cell numbers in glomeruli and significantly reduced glomerular scar score (2.5 ± 0.2 [control IgG] vs. 1.8 ± 0.2 [1D11], P proteinuria. While overt proteinuria and podocyte effacement persist, 1D11 prevents total podocytes detachment, which might be a key event activating fibrogenic events in glomeruli.

  1. Wtip- and gadd45a-interacting protein dendrin is not crucial for the development or maintenance of the glomerular filtration barrier.

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    Zhijie Xiao

    Full Text Available Glomerular podocyte cells are critical for the function of the renal ultrafiltration barrier. Especially, the highly specialized cell-cell junction of podocytes, the slit diaphragm, has a central role in the filtration barrier. This is highlighted by the fact that mutations in molecular components of the slit diaphragm, including nephrin and Cd2-associated protein (Cd2ap, result in proteinuric diseases in man. Dendrin is a poorly characterized cytosolic component of the slit diaphragm in where it interacts with nephrin and Cd2ap. Dendrin is highly specific for the podocyte slit diaphragm, suggesting that it has a dedicated role in the glomerular filtration barrier. In this study, we have generated a dendrin knockout mouse line and explored the molecular interactions of dendrin. Dendrin-deficient mice were viable, fertile, and had a normal life span. Morphologically, the glomerulogenesis proceeded normally and adult dendrin-deficient mice showed normal glomerular histology. No significant proteinuria was observed. Following glomerular injury, lack of dendrin did not affect the severity of the damage or the recovery process. Yeast two-hybrid screen and co-immunoprecipitation experiments showed that dendrin binds to Wt1-interacting protein (Wtip and growth arrest and DNA-damage-inducible 45 alpha (Gadd45a. Wtip and Gadd45a mediate gene transcription in the nucleus, suggesting that dendrin may have similar functions in podocytes. In line with this, we observed the relocation of dendrin to nucleus in adriamycin nephropathy model. Our results indicate that dendrin is dispensable for the function of the normal glomerular filtration barrier and that dendrin interacts with Wtip and Gadd45a.

  2. Anthracycline Drugs on Modified Surface of Quercetin-Loaded Polymer Nanoparticles: A Dual Drug Delivery Model for Cancer Treatment.

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    Chabita Saha

    Full Text Available Polymer nanoparticles are vehicles used for delivery of hydrophobic anti-cancer drugs, like doxorubicin, paclitaxel or chemopreventors like quercetin (Q. The present study deals with the synthesis and characterisation of nano formulations (NFs from Q loaded PLGA (poly lactic-co-glycolic acid nano particles (NPs by surface modification. The surface of Q-loaded (NPs is modified by coating with biopolymers like bovine serum albumin (BSA or histones (His. Conventional chemotherapeutic drugs adriamycin (ADR and mitoxantrone (MTX are bound to BSA and His respectively before being coated on Q-loaded NPs to nano formulate NF1 and NF2 respectively. The sizes of these NFs are in the range 400-500 nm as ascertained by SEM and DLS measurements. Encapsulation of Q in polymer NPs is confirmed from shifts in FT-IR, TGA and DSC traces of Q-loaded NPs compared to native PLGA and Q. Surface modification in NFs is evidenced by three distinct regions in their TEM images; the core, polymer capsule and the coated surface. Negative zeta potential of Q-loaded NPs shifted to positive potential on surface modification in NF1 and NF2. In vitro release of Q from the NFs lasted up to twenty days with an early burst release. NF2 is better formulation than NF1 as loading of MTX is 85% compared to 23% loading of ADR. Such NFs are expected to overcome multi-drug resistance (MDR by reaching and treating the target cancerous cells by virtue of size, charge and retention.

  3. Comparison of the multi-drug resistant human hepatocellular carcinoma cell line Bel-7402/ADM model established by three methods

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    Zhong Xingguo

    2010-08-01

    Full Text Available Abstract Background To compare the biological characteristics of three types of human hepatocellular carcinoma multi-drug resistant cell sub-lines Bel-7402/ADM models established by three methods. Methods Established human hepatocellular carcinoma adriamycin (ADM multi-drug resistant cell sub-lines models Bel-7402/ADMV, Bel-7402/ADML and Bel-7402/ADMS by three methods of in vitro concentration gradient increased induction, nude mice liver-implanted induction and subcutaneous-implanted induction respectively. Phase contrast microscopy was used to observe the cells and the MTT (methyl thiazolyl tetrazolium method was used to detect drug resistance of the three different sub-lines of cells. Results The three groups of drug resistant cells, Bel-7402/ADMV, Bel-7402/ADML and Bel-7402/ADMS generated cross-resistance to ADM and CDDP (cis-Diaminedichloroplatinum, but showed a significant difference in resistance to Bel-7402 IC50 value (P V, 46 h (Bel-7402/ADML, and 45 h (Bel-7402/ADMS. The excretion rates of ADM were significantly increased compared with the parent cell (34.14% line and were 81.06% (Bel-7402/ADMV, 66.56% (Bel-7402/ADML and 61.56% (Bel-7402/ADMS. Expression of P-gp and MRP in the three groups of resistant cells was significantly enhanced (P P > 0.05. Conclusions Stable resistance was involved in the resistant cell line model established by the above three methods. Liver implantation was a good simulation of human hepatocellular and proved to be an ideal model with characteristics similar to human hepatocellular biology and the pharmacokinetics of anticancer drugs.

  4. Cyclin-dependent kinase inhibitor, flavopiridol, induces apoptosis and inhibits tumor growth in drug-resistant osteosarcoma and Ewing's family tumor cells.

    Science.gov (United States)

    Li, Yan; Tanaka, Kazuhiro; Li, Xu; Okada, Takamitsu; Nakamura, Tomoyuki; Takasaki, Minoru; Yamamoto, Shunsaku; Oda, Yoshinao; Tsuneyoshi, Masazumi; Iwamoto, Yukihide

    2007-09-15

    Multimodal therapies play important roles in the treatment of osteosarcoma (OS) and Ewing's family of tumors (EFTs), two most frequent malignant bone tumors. Although the clinical outcome of primary OS and EFTs is greatly improved, the relapsed cases often are associated with multidrug resistance of the tumors and the prognosis of these patients is still poor. Flavopiridol, a pan cyclin-dependent kinase (CDK) inhibitor is a novel antitumor agent that can induce cell cycle arrest and apoptosis in many cancer cells. However, there have been no studies about the effects of flavopiridol on drug-resistant OS and EFTs. Here, we demonstrated that flavopiridol induced the cleavage of poly-ADP-ribose polymerase (PARP) in a time and dose dependent manner in adriamycin-resistant OS and EFTs cells expressing P-glycoprotein (P-gp) and multidrug resistance-associated protein 1 (MRP(1)) as effectively as in their parental cells. Our data also showed that flavopiridol caused the release of mitochondrial cytochrome c and the activation of caspase-9, caspase-8 and caspase-3, with an increase ratio of the proapoptotic protein level (Bax) to the antiapoptotic protein level (Bcl-2 and Bcl-X(L)), while apoptosis was inhibited by pan caspase inhibitor (Z-VAD-FMK) and caspase-3 inhibitor (Z-DEVD-FMK), not by caspase-8 inhibitor (Z-IETD-FMK). The treatment with flavopiridol further inhibited the tumor growth in mouse models of the drug-resistant OS and EFTs. These results suggest that flavopiridol might be promising in clinical therapy for the relapsed OS and EFTs. (c) 2007 Wiley-Liss, Inc.

  5. Protective specific immunity induced by doxorubicin plus TNF-alpha combination treatment of EL4 lymphoma-bearing C57BL/6 mice.

    Science.gov (United States)

    Ehrke, M J; Verstovsek, S; Maccubbin, D L; Ujházy, P; Zaleskis, G; Berleth, E; Mihich, E

    2000-07-01

    The therapeutic efficacy of a single (day 8), moderate dose (4 mg/kg, i.v.) of doxorubicin (DOX, Adriamycin) combined with recombinant human TNF-alpha (3 different doses and 5 different schedules, i.v.) was evaluated in C57BL/6 mice bearing an implant (s.c.) of the DOX-sensitive, TNF-alpha-resistant EL4 lymphoma. In parallel to monitoring survival, the levels of several host anti-tumor cytolytic effector functions of splenocytes and thymocytes were evaluated throughout the treatment period and in long-term survivors (LTS). DOX treatment alone resulted in a moderate (approx. 20%) increase in life span but no cures. TNF-alpha alone, at any tested dose or schedule, had little or no positive effect on survival. The combinations of DOX and TNF-alpha were only slightly better than DOX alone with respect to the time to death of mice that died (approx. 29% increase); however, each of the combinations involving 1,000 U TNF-alpha/injection produced a fraction (20% to 80%) of LTS. The host defense activities examined included those of splenic and thymic cytolytic T lymphocytes (CTL) and lymphokine-activated killer cells as well as splenic tumoricidal macrophages. Although most activities were modulated by tumor growth and/or treatment, only CTL responsiveness appeared to correlate with survival. CTL activity in the treated groups with LTS was significantly higher than in control groups late in the treatment period. Finally, ex vivo analyses of splenocytes and thymocytes together with the rejection of implanted tumor at 17 months established that LTS displayed specific long-term immune memory. Copyright 2000 Wiley-Liss, Inc.

  6. p53-Dependent PUMA to DRAM antagonistic interplay as a key molecular switch in cell-fate decision in normal/high glucose conditions.

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    Garufi, Alessia; Pistritto, Giuseppa; Baldari, Silvia; Toietta, Gabriele; Cirone, Mara; D'Orazi, Gabriella

    2017-09-11

    As an important cellular stress sensor phosphoprotein p53 can trigger cell cycle arrest and apoptosis and regulate autophagy. The p53 activity mainly depends on its transactivating function, however, how p53 can select one or another biological outcome is still a matter of profound studies. Our previous findings indicate that switching cancer cells in high glucose (HG) impairs p53 apoptotic function and the transcription of target gene PUMA. Here we report that, in response to drug adriamycin (ADR) in HG, p53 efficiently induced the expression of DRAM (damage-regulated autophagy modulator), a p53 target gene and a stress-induced regulator of autophagy. We found that ADR treatment of cancer cells in HG increased autophagy, as displayed by greater LC3II accumulation and p62 degradation compared to ADR-treated cells in low glucose. The increased autophagy in HG was in part dependent on p53-induced DRAM; indeed DRAM knockdown with specific siRNA reversed the expression of the autophagic markers in HG. A similar outcome was achieved by inhibiting p53 transcriptional activity with pifithrin-α. DRAM knockdown restored the ADR-induced cell death in HG to the levels obtained in low glucose. A similar outcome was achieved by inhibition of autophagy with cloroquine (CQ) or with silencing of autophagy gene ATG5. DRAM knockdown or inhibition of autophagy were both able to re-induce PUMA transcription in response to ADR, underlining a reciprocal interplay between PUMA to DRAM to unbalance p53 apoptotic activity in HG. Xenograft tumors transplanted in normoglycemic mice displayed growth delay after ADR treatment compared to those transplanted in diabetics mice and such different in vivo response correlated with PUMA to DRAM gene expression. Altogether, these findings suggest that in normal/high glucose condition a mutual unbalance between p53-dependent apoptosis (PUMA) and autophagy (DRAM) gene occurred, modifying the ADR-induced cancer cell death in HG both in vitro and in vivo.

  7. Review and follow-up of patients using a regional sperm cryopreservation service: ensuring that resources are targeted to those patients most in need.

    Science.gov (United States)

    Tomlinson, M; Meadows, J; Kohut, T; Haoula, Z; Naeem, A; Pooley, K; Deb, S

    2015-07-01

    Are all patients undergoing chemotherapy for long-term sperm banking at risk of permanent sterility? Male fertility is generally lower in men with cancer and all patient groups are at risk of azoospermia. Careful management is required to ensure that samples are not stored for excessively long periods should they not be required. A retrospective analysis of 1688 patient records and prospective recall of patients for semen testing were performed. Pre-therapy fertility was compared with a group of pre-vasectomy patients as a comparator. Those who fail to bank spermatozoa, rates of disposal of samples and the utilization in assisted reproduction were also examined. Sperm quality was poorest in testicular cancer (TC) patients followed by those with Hodgkin's lymphoma (HL) prior to treatment. Post-therapy data were available in 376 patients (42%). Sperm number was lowest (and azoospermia highest at 77%) in patients with HL treated with regimens other than adriamycin, bleomycin, vinblastine and dacarbazine (ABVD). Non-HL NHL and leukaemic patients had similarly high rates of azoospermia at 46 and 55%. HL patients treated with ABVD (11%) and TC patients (9.7%) had the lowest rates of azoospermia. Azoospermia was seen in every treatment group except for TC patients receiving carboplatin. Only 45 patients used their samples in ART (4.5%) in 10 years. Little is known about the fertility status of the patients not coming forward for follow-up testing, those conceiving naturally, those with no intention of conceiving and some which may have psychological reasons for not attending. In conclusion, virtually all patients undergoing chemotherapy are potentially at risk of temporary or permanent infertility. However, as uptake and utilization of stored material remain low, sperm banks should be carefully managed to ensure that resources are targeted to the patients most in need. © 2015 American Society of Andrology and European Academy of Andrology.

  8. Waldenström makroglobulinemili hastada rituksimab tedavisi sonrası gelişen gizli hepatit B reaktivasyonu

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    Vedat Aslan

    2012-12-01

    Full Text Available The anti-CD20 monoclonal antibody rituximab has beenused extensively in the treatment of B-cell lymphoma.Several studies reported hepatitis B virus (HBV reactivationafter rituximab. The majority of these cases havebeen described in chronic carriers of HBV, whereas reactivationin occult hepatitis B virus (OHBV carriers mayoccur.The presented case with the diagnosis of Waldenström’smacroglobulinemia was HBsAg negative and anti HBcIgGpositive before chemotherapy. The patient was started onCVP (cyclophosphamide, vincristine, prednisolone chemotherapy.However, no clinical or laboratory responsewas obtained and the patient was considered unresponsiveto three cycles of CVP therapy. Therefore R-CHOP(rituximab, cyclophosphamide, adriamycin, vincristineand prednisolone was planned as the second therapy.Laboratory work-up after the first cycle of R-CHOP therapyrevealed an aspartate aminotransferase (AST levelof 267 U/L and alanine aminotransferase (ALT level of318 U/L. HBsAg and anti HBcIgG were positive and HBVDNA was 56400 IU/ml. Lamivudin 100 mg/day was started.Four weeks after the initiation of lamivudin therapy,ALT and AST levels returned to normal. Currently, the patienthas received the fourth cycle of R-CHOP therapy.ALT and AST levels continue to be in normal range. Thiscondition was considered to be the reactivation of OHBVfollowing rituximab.The aim of this case presentation is to call attention toHBV reactivation possibility in cases taking immunosupressivemedications like Rituximab. J Clin Exp Invest2012; 3(4: 541-544Key words: Waldenström’s macroglobulinemia, rituximab,occult HBV infection

  9. Chaetominine reduces MRP1-mediated drug resistance via inhibiting PI3K/Akt/Nrf2 signaling pathway in K562/Adr human leukemia cells

    Energy Technology Data Exchange (ETDEWEB)

    Yao, Jingyun; Wei, Xing [State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai (China); Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai (China); Lu, Yanhua, E-mail: luyanhua@ecust.edu.cn [State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai (China); Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai (China)

    2016-05-13

    Drug resistance limits leukemia treatment and chaetominine, a cytotoxic alkaloid that promotes apoptosis in a K562 human leukemia cell line via the mitochondrial pathway was studied with respect to chemoresistance in a K562/Adr human resistant leukemia cell line. Cytotoxicity assays indicated that K562/Adr resistance to adriamycin (ADR) did not occur in the presence of chaetominine and that chaetominine increased chemosensitivity of K562/Adr to ADR. Data show that chaetominine enhanced ADR-induced apoptosis and intracellular ADR accumulation in K562/Adr cells. Accordingly, chaetominine induced apoptosis by upregulating ROS, pro-apoptotic Bax and downregulating anti-apoptotic Bcl-2. RT-PCR and western-blot confirmed that chaetominine suppressed highly expressed MRP1 at mRNA and protein levels. But little obvious alternation of another drug transporter MDR1 mRNA was observed. Furthermore, inhibition of MRP1 by chaetominine relied on inhibiting Akt phosphorylation and nuclear Nrf2. In summary, chaetominine strongly reverses drug resistance by interfering with the PI3K/Akt/Nrf2 signaling, resulting in reduction of MRP1-mediated drug efflux and induction of Bax/Bcl-2-dependent apoptosis in an ADR-resistant K562/Adr leukemia cell line. - Highlights: • Chaetominine enhanced chemosensitivity of ADR against K562/Adr cells. • Chaetominine increased intracellular ADR levels via inhibiting MRP1. • Chaetominine induced apoptosis of K562/Adr cells through upregulation of ROS and modulation of Bax/Bcl-2. • Inhibition of MRP1 and Nrf2 by chaetominine treatment was correlative with blockade of PI3K/Akt signaling.

  10. MicroRNA-101 regulates T-cell acute lymphoblastic leukemia progression and chemotherapeutic sensitivity by targeting Notch1.

    Science.gov (United States)

    Qian, Lu; Zhang, Wanggang; Lei, Bo; He, Aili; Ye, Lianhong; Li, Xingzhou; Dong, Xin

    2016-11-01

    The present study aimed to investigate the role of microRNA (miR)-101 in acute lymphoblastic leukemia progression and chemoresistance. Furthermore, a novel target gene of miR-101 was identified. Here, we confirmed that miR-101 was significantly downregulated in the blood samples of patients with T-cell acute lymphoblastic leukemia (T-ALL) compared with the healthy controls, as determined by reverse transcription quantitative polymerase chain reaction (RTqPCR) analysis. The in vitro experiments demonstrated that miR-101 significantly repressed the proliferation and invasion, and induced potent apoptosis in Jurkat cells, as determined by CCK-8, flow cytometer and cell invasion assays. Luciferase assay confirmed that Notch1 was a target gene of miR-101, and western blotting showed that miR-101 suppressed the expression of Notch1 at the protein level. Moreover, functional restoration assays revealed that Notch1 mediates the effects of miR-101 on Jurkat cell proliferation, apoptosis and invasion. miR-101 enhanced the sensitivity of Jurkat cells to the chemotherapeutic agent adriamycin. Taken together, our results show for the first time that miR-101 acts as a tumor suppressor in T-cell acute lymphoblastic leukaemia and it could enhance chemotherapeutic sensitivity. Furthermore, Notch1 was identified to be a novel target of miR-101. This study indicates that miR-101 may represent a potential therapeutic target for T-cell acute lymphoblastic leukemia intervention.

  11. CRISPR/Cas9, a new approach to successful knockdown of ABCB1/P-glycoprotein and reversal of chemosensitivity in human epithelial ovarian cancer cell line

    Directory of Open Access Journals (Sweden)

    Leyla Norouzi-Barough

    2018-02-01

    Full Text Available Objective(s: Multidrug resistance (MDR is a major obstacle in the successful chemotherapy of ovarian cancer. Inhibition of P-glycoprotein (P-gp, a member of ATP-binding cassette (ABC transporters, is a well-known strategy to overcome MDR in cancer. The aim of this study was to investigate the efficiency and ability of CRISPR/Cas9 genome editing technology to knockdown ABCB1 gene expression in adriamycin resistant (A2780/ADR ovarian cancer cell line and evaluate the sensitivity changes to doxorubicin. Materials and Methods: Three single-guide RNAs (sgRNAs targeting the fourth and fifth exons of human ABCB1 gene were designed in this study. Expression level of ABCB1 was detected using quantitative real time PCR (qRT-PCR after co-transfection of all three sgRNAs into A2780/ADR cell line and subsequent antibiotic selection. Drug sensitivity to doxorubicin was determined by the 3-(4,5-dimethylthiazol-2-yl-2,5-diphenyltetrazolium bromide (MTT assay. Results: The results showed that CRISPR/Cas9 system could significantly reduce the expression of P-gp. The dramatic decline in ABCB1 gene expression was associated with increased sensitivity of cells transfected with sgRNAs to doxorubicin. Conclusion: Based on the results of this study, it is concluded that the CRISPR-based systems, used in the present study, effectively down-regulated the target gene and acted as an ideal and cost-effective tool for gene editing of A2780/ADR cell line resulting in restoration of nonmalignant phenotype.

  12. [Adjuvant chemotherapy in gastric cancer. Experience at the National Institute of Nutrition].

    Science.gov (United States)

    León Rodríguez, E; Domínguez, A

    1992-01-01

    The cases of gastric carcinoma treated with surgery plus chemotherapy (FAM) at the Instituto Nacional de la Nutricion (INNSZ) in Mexico City from January 1979 to December 1988 were reviewed. In 322 patients seen in this period, only in 12.4% (40 patients) it was possible to undertake curative resection; of these, twenty two received adjuvant FAM (fluorouracil, 600 mg/m2 IV days 1,2,3; doxorubicin, 30-35 mg/m2 day 1; and mitomycin-C, 10 mg/m2 in three days). Twenty patients were in stage III and two in stage II. At a median follow-up of five years, ten patients have relapsed; of these, eight died from progressive neoplasia; one is alive with no evidence of disease 24 months after receiving combined chemotherapy with 5-fluorouracil, cisplatinum and adriamycin, and one is alive with the disease. Nine patients (40.5%) are alive with no evidence of relapse 30 to 114 months after initial surgery. One patient died from unrelated causes with no evidence of relapse. Two individuals were lost to follow up at 9 months and 28 months, without evident malignant disease at the time of last consultation. The median survival was 61 months with a 51% estimated overall survival at five years. None of the prognostic factors analyzed were significantly associated with recurrence: number of metastatic lymph nodes; number of cycles of chemotherapy; interval between surgery and chemotherapy; and intraoperative blood transfusions requirements, although there was a tendency to relapse in the majority of the patients who received intraoperative blood transfusions as compared with the untransfused (five years disease free survival of 18% vs 64% respectively).(ABSTRACT TRUNCATED AT 250 WORDS)

  13. Modulation of paclitaxel transport by flavonoid derivatives in human breast cancer cells. Is there a correlation between binding affinity to NBD of P-gp and modulation of transport?

    Science.gov (United States)

    Václavíková, Radka; Boumendjel, Ahcene; Ehrlichová, Marie; Kovár, Jan; Gut, Ivan

    2006-07-01

    We have investigated the effect of 13 flavonoid derivatives on [(14)C]paclitaxel transport in two human breast cancer cell lines, the adriamycin-resistant NCI/ADR-RES and sensitive MDA-MB-435. For this study, we selected representatives of aurones, chalcones, flavones, flavonols, chromones, and isoflavones with known binding affinity toward nucleotide-binding domain (NBD2) of P-glycoprotein and for which no reported work is available regarding paclitaxel transport. Aurones CB-284, CB-285, CB-287, and ML-50 most effectively inhibited P-gp related transport in the resistant line in comparison with chalcones, flavones, flavonols, chromones, and isoflavone derivatives and accordingly increased the accumulation of [(14)C]paclitaxel and decreased its efflux. Those agents efficiently modulated paclitaxel transport in P-gp highly expressing resistant human breast cancer cells and they could increase the efficiency of chemotherapy in paclitaxel-resistant tumors. In contrast, the sensitive cell line responded reversely in that CB-284, CB-285, CB-287, and ML-50 significantly inhibited accumulation of [(14)C]paclitaxel and especially CB-287, which significantly stimulated its efflux. Some, but not all, of the data correlated with the binding of flavonoid derivatives to P-gp, and indicated that even in the P-gp highly expressing NCI/ADR-RES cells, the binding was not the only factor influencing the transport of [(14)C]paclitaxel. Opposite effects of flavonoid derivatives on the P-gp highly expressing and MDA-MB-435 non-expressing cell lines indicate that paclitaxel is not only transported by P-gp and let us assume that Mrp2 or ABCC5 seem to be good transport-candidates in these cells. The inhibition of paclitaxel accumulation and stimulation of its efflux are potentially unfavorable for drug therapy and since they could be due to modulation of drug transporters other than P-gp, their expression in tumors is of great significance for efficient chemotherapy.

  14. The radio-sensitizing effect of xanthohumol is mediated by STAT3 and EGFR suppression in doxorubicin-resistant MCF-7 human breast cancer cells.

    Science.gov (United States)

    Kang, Youra; Park, Min A; Heo, Se-Woong; Park, Su-Young; Kang, Keon Wook; Park, Pil-Hoon; Kim, Jung-Ae

    2013-03-01

    Chemotherapeutic drug resistance remains a clinical obstacle in cancer management. Drug-resistant cancer cells usually exhibit cross-resistance to ionizing radiation, which has devastating consequences for patients. With a better understanding of the molecular mechanisms, it will be possible to develop strategies to overcome this cross-resistance and to increase therapeutic sensitivity. Natural and synthetic flavonoid compounds including xanthohumol, the principal flavonoid in hops, were investigated for its radio-sensitizing activity on human breast cancer MCF-7 and adriamycin-resistant MCF-7 (MCF-7/ADR) cells. Chemo-sensitizing or radio-sensitizing effect was analyzed by tetrazolium-based colorimetric assay and flow cytometry. Western blot analysis, confocal microscopy, gene silencing with siRNA transfection and luciferase reporter gene assay were performed to examine signaling molecule activation. Among the tested flavonoid compounds, pretreatment of the cells with xanthohumol significantly sensitized MCF-7/ADR cells to the radiation treatment by inducing apoptosis. In MCF-7/ADR cells, treatment with xanthohumol alone or with gamma-rays significantly decreased levels of anti-apoptotic proteins. Multi-drug resistance 1 (MDR1), epidermal growth factor receptor (EGFR) and signal transducer and activator of transcription 3 (STAT3) expression levels in MCF-7/ADR cells were suppressed by xanthohumol treatment. In addition, xanthohumol treatment increased death receptor (DR)-4 and DR5 expression. The xanthohumol-induced changes of these resistance-related molecules in MCF-7/ADR cells were synergistically increased by gamma-ray treatment. Xanthohumol restored sensitivity of MCF-7/ADR cells to doxorubicin and radiation therapies. Our results suggest that xanthohumol may be a potent chemo- and radio-sensitizer, and its actions are mediated through STAT3 and EGFR inhibition.

  15. Comparison of trichostatin A and valproic acid treatment regimens in a mouse model of kidney fibrosis

    Energy Technology Data Exchange (ETDEWEB)

    Van Beneden, Katrien, E-mail: kvbenede@vub.ac.be [Department of Human Anatomy, Liver Cell Biology Lab, Vrije Universiteit Brussel, Brussels (Belgium); Geers, Caroline [Department of Pathology, Universitair Ziekenhuis Brussel, Brussels (Belgium); Pauwels, Marina [Department of Human Anatomy, Liver Cell Biology Lab, Vrije Universiteit Brussel, Brussels (Belgium); Mannaerts, Inge [Department of Cell Biology, Liver Cell Biology Lab, Vrije Universiteit Brussel, Brussels (Belgium); Wissing, Karl M. [Department of Nephrology, Universitair Ziekenhuis Brussel, Brussels (Belgium); Van den Branden, Christiane [Department of Human Anatomy, Liver Cell Biology Lab, Vrije Universiteit Brussel, Brussels (Belgium); Grunsven, Leo A. van, E-mail: lvgrunsv@vub.ac.be [Department of Cell Biology, Liver Cell Biology Lab, Vrije Universiteit Brussel, Brussels (Belgium)

    2013-09-01

    Histone deacetylase (HDAC) inhibitors are promising new compounds for the therapy of fibrotic diseases. In this study we compared the effect of two HDAC inhibitors, trichostatin A and valproic acid, in an experimental model of kidney fibrosis. In mice, doxorubicin (adriamycin) can cause nephropathy characterized by chronic proteinuria, glomerular damage and interstitial inflammation and fibrosis, as seen in human focal segmental glomerulosclerosis. Two treatment regimens were applied, treatment was either started prior to the doxorubicin insult or delayed until a significant degree of proteinuria and fibrosis was present. Pre-treatment of trichostatin A significantly hampered glomerulosclerosis and tubulointerstitial fibrosis, as did the pre-treatment with valproic acid. In contrast, the development of proteinuria was only completely inhibited in the pre-treated valproic acid group, and not in the pre-treated trichostatin A animals. In the postponed treatment with valproic acid, a complete resolution of established doxorubicin-induced proteinuria was achieved within three days, whereas trichostatin A could not correct proteinuria in such a treatment regimen. However, both postponed regimens have comparable efficacy in maintaining the kidney fibrosis to the level reached at the start of the treatments. Moreover, not only the process of fibrosis, but also renal inflammation was attenuated by both HDAC inhibitors. Our data confirm a role for HDACs in renal fibrogenesis and point towards a therapeutic potential for HDAC inhibitors. The effect on renal disease progression and manifestation can however be different for individual HDAC inhibitors. - Highlights: • Valproic acid is a potent antiproteinuric drug, whereas trichostatin A is not. • Trichostatin A and valproic acid reduce kidney fibrosis in doxorubicin nephropathy. • Both valproic acid and trichostatin A attenuate renal inflammation.

  16. Clinical application of l-123 MlBG cardiac imaging

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Do Young [College of Medicine, Donga Univ., Busan (Korea, Republic of)

    2004-10-01

    Cardiac neurotransmission imaging allows in vivo assessment of presynaptic reuptake, neurotransmitter storage and postsynaptic receptors. Among the various neurotransmitter, I-123 MlBG is most available and relatively well-established. Metaiodobenzylguanidine (MIBG) is an analogue of the false neurotransmitter guanethidine. It is taken up to adrenergic neurons by uptake-1 mechanism as same as norepinephrine. As tagged with I-123, it can be used to image sympathetic function in various organs including heart with planar or SPECT techniques. I-123 MIBG imaging has a unique advantage to evaluate myocardial neuronal activity in which the heart has no significant structural abnormality or even no functional derangement measured with other conventional examination. In patients with cardiomyopathy and heart failure, this imaging has most sensitive technique to predict prognosis and treatment response of betablocker or ACE inhibitor. In diabetic patients, it allow very early detection of autonomic neuropathy. In patients with dangerous arrhythmia such as ventricular tachycardia or fibrillation, MIBG imaging may be only an abnormal result among various exams. In patients with ischemic heart disease, sympathetic derangement may be used as the method of risk stratification. In heart transplanted patients, sympathetic reinnervation is well evaluated. Adriamycin-induced cardiotoxicity is detected earlier than ventricular dysfunction with sympathetic dysfunction. Neurodegenerative disorder such as Parkinson's disease or dementia with Lewy bodies has also cardiac sympathetic dysfunction. Noninvasive assessment of cardiac sympathetic nerve activity with l-123 MlBG imaging may be improve understanding of the pathophysiology of cardiac disease and make a contribution to predict survival and therapy efficacy.

  17. [Axillary pathologic response after neoadjuvant chemotherapy in locally advanced breast cancer with axillary involvement].

    Science.gov (United States)

    Jiménez-Ballvé, A; Serrano-Palacio, A; García-Sáenz, J A; Ortega Candil, A; Salsidua-Arroyo, O; Román-Santamaría, J M; Pelayo Alarcón, A; Fuentes Ferrer, M E; Carreras-Delgado, J L

    2015-01-01

    To compare axillary involvement (N+) at initial staging in locally advanced breast cancer (LABC) with axillary lymphadenectomy histologic results after neoadjuvant chemotherapy treatment (NeoChemo). Retrospective study between November 2011 and September 2013 of LABC cases treated with neoadjuvant chemotherapy based on docetaxel (associated with trastuzumab in HER2 positive cases and carboplatin/adriamycin in HER2 negative cases). Those clinically or radiologically suspected cases of axillary involvement were histologically confirmed. When there was no suspicion of axillary involvement, sentinel lymph node radioguided biopsy (SLNRB) was performed using intradermal injection of (99m)Tc-nanocolloid albumin prior to neoadjuvant treatment. Axillary lymphadenectomy after NeoChemo was undertaken in all cases with positive axilla. Final pathologic response was classified as complete (pCR) when there was no evidence of tumoral disease and as non-pathologic complete response (no pCR) in the opposite case. A total of 346 patients treated with docetaxel were reviewed, identifying 105 LABC. Axillary involvement at initial staging was detected in 70 (67%) before starting NeoChemo. From these 70, 73% (n=51) were N+ (fine needle biopsy and/or biopsy) and the remaining 19 (27%) were occult N+ detected by SLNRB. Axillary lymphadenectomy detected pCR in 56% (39/70), increasing up to 84% pCR when initial N+ status was reached using SNLB. On the other hand, when N+ was detected using fine needle biopsy/lymph biopsy, pCR was only 45%. More than 50% of women affected by locally advanced breast cancer with tumoral axillary involvement at initial diagnosis present free metastatic axilla after therapeutic neoadjuvant chemotherapy effect. This increases up to almost 90% in case of occult metastatic axilla detected with sentinel node biopsy prior starting neoadjuvant chemotherapy. Copyright © 2014 Elsevier España, S.L.U. and SEMNIM. All rights reserved.

  18. Suppressive effects of retinoids, carotenoids and antioxidant vitamins on heterocyclic amine-induced umu C gene expression in Salmonella typhimurium (TA 1535/pSK 1002).

    Science.gov (United States)

    Okai, Y; Higashi-Okai, K; Nakamura, S; Yano, Y; Otani, S

    1996-06-12

    Effects of retinoids, carotenoids and antioxidant vitamins were studied by mutagen-induced umu C gene expression system in Salmonella typhimurium (TA 1535/pSK 1002). Retinol (vitamin A), retinol acetate and retinoic acid showed remarkable inhibitory activities, whereas retinol palmitate exhibited significant but weak activity for umu C gene expression in tester bacteria induced by 3-amino-3,4-dimethyl-5H-pyrido[4.3-b]indol (Trp-P-1) in the presence of hepatic metabolizing enzymes (S9 mixture). Carotenoids having provitamin A activity (beta-carotene and canthaxanthin) exhibited moderate suppressive effects on the same experimental system. The ranks of suppressive activities were retinol > retinol acetate > retinoic acid > canthaxanthin > beta-carotene > retinol palmitate and their doses for inhibition by 50% (ID50) were estimated to be 1.2 x 10(-7), 3.0 x 10(-7), 5.4 x 10(-7), 1.5 x 10(-6), 4.0 x 10(-5) and 6.0 x 10(-5) M, respectively. However, they did not cause significant inhibition on umu C gene expression induced by direct-acting mutagen (adriamycin or mitomycin C) in the absence of S9 mixture. Inhibition of umu gene expression appears to be due to inhibition of P450-mediated metabolic activation of the heterocyclic amine Trp-P-1. Ascorbic acid (vitamin C) showed weak but significant suppressive activity at high-dose concentrations (3 x 10(-6) - 10(-4)M). However, alpha-tocopherol did not exhibit significant suppression at all dose concentrations. The significance of the experimental results is discussed from the viewpoint of the chemoprevention against genotoxicity associated with carcinogenesis.

  19. Structure, Absolute Configuration, and Antiproliferative Activity of Abietane and Icetexane Diterpenoids from Salvia ballotiflora

    Directory of Open Access Journals (Sweden)

    Baldomero Esquivel

    2017-10-01

    Full Text Available From the aerial parts of Salvia ballotiflora, eleven diterpenoids were isolated; among them, four icetexanes and one abietane (1–5 are reported for the first time. Their structures were established by spectroscopic means, mainly 1H- and 13C-NMR, including 1D and 2D homo- and hetero-nuclear experiments. Most of the isolated diterpenoids were tested for their antiproliferative, anti-inflammatory, and radical scavenging activities using the sulforhodamine B assay on six cancer cell lines, the TPA-induced ear edema test in mice, and the reduction of the DPPH assay, respectively. Some diterpenoids showed anti-proliferative activity, these being icetexanes 6 and 3, which were the most active with IC50 (μM = 0.27 ± 0.08 and 1.40 ± 0.03, respectively, for U251 (human glioblastoma and IC50 (μM = 0.0.46 ± 0.05 and 0.82 ± 0.06 for SKLU-1 (human lung adenocarcinoma, when compared with adriamycin (IC50 (μM = 0.08 ± 0.003 and 0.05 ± 0.003, as the positive control, respectively. Compounds 3 and 10 showed significant reduction of the induced ear edema of 37.4 ± 2.8 and 25.4 ± 3.0% (at 1.0 μmol/ear, respectively. Compound 4 was the sole active diterpenoid in the antioxidant assay (IC50 = 98. 4 ± 3.3, using α-tocopherol as the positive control (IC50 (μM = 31.7 ± 1.04. The diterpenoid profile found is of chemotaxonomic relevance and reinforces the evolutionary link of S. ballotiflora with other members of the section Tomentellae.

  20. p-TSA-promoted syntheses of 5H-benzo[h] thiazolo[2,3-b]quinazoline and indeno[1,2-d] thiazolo[3,2-a]pyrimidine analogs: molecular modeling and in vitro antitumor activity against hepatocellular carcinoma.

    Science.gov (United States)

    Keshari, Amit K; Singh, Ashok K; Raj, Vinit; Rai, Amit; Trivedi, Prakruti; Ghosh, Balaram; Kumar, Umesh; Rawat, Atul; Kumar, Dinesh; Saha, Sudipta

    2017-01-01

    In our efforts to address the rising incidence of hepatocellular carcinoma (HCC), we have made a commitment to the synthesis of novel molecules to combat Hep-G2 cells. A facile and highly efficient one-pot, multicomponent reaction has been successfully devised utilizing a p-toluenesulfonic acid (p-TSA)-catalyzed domino Knoevenagel/Michael/intramolecular cyclization approach for the synthesis of novel 5H-benzo[h]thiazolo[2,3-b]quinazoline and indeno[1,2-d] thiazolo[3,2-a]pyrimidine analogs bearing a bridgehead nitrogen atom. This domino protocol constructed one new ring by the concomitant formation of multiple bonds (C-C, C-N, and C=N) involving multiple steps without the use of any metal catalysts in one-pot, with all reactants effi-ciently exploited. All the newly synthesized compounds were authenticated by means of Fourier transform infrared spectroscopy, liquid chromatography-mass spectrometry, proton nuclear magnetic resonance spectroscopy, and carbon-13 nuclear magnetic resonance spectroscopy, together with elemental analysis, and their antitumor activity was evaluated in vitro on a Hep-G2 human cancer cell line by sulforhodamine B assay. Computational molecular modeling studies were carried out on cancer-related targets, including interleukin-2, interleukin-6, Caspase-3, and Caspase-8. Two compounds (4A and 6A) showed growth inhibitory activity comparable to the positive control Adriamycin, with growth inhibition of 50% b]quinazoline system showed the optimum effect. The in silico simulations suggested crucial hydrogen bond and π-π stacking interactions, with a good ADMET (absorption, distribution, metabolism, excretion, and toxicity) profile and molecular dynamics, in order to explore the molecular targets of HCC which were in complete agreement with the in vitro findings. Considering their significant anticancer activity, 4A and 6A are potential drug candidates for the management of HCC.

  1. Phytochemical screening and antioxidant, antimitotic, and antiproliferative activities of Trichodesma indicum shoot

    Directory of Open Access Journals (Sweden)

    Shweta S Saboo

    2014-01-01

    Full Text Available Background: Traditionally Trichodesma indicum has been used for its therapeutic effect in folk medicine that include anti-inflammatory, analgesic and anticancer properties. In this work, we validate the anticancer potential of the plant. Aims: To screen the shoot extracts T. indicum for their antimitotic and antiproliferative activities. Materials and Methods: The dried aerial parts of T. indicum were successively extracted with petroleum ether, successive chloroform extract (SCH, successive ethanol extract (SEE and water. The plant extracts were subjected to study of in vitro antioxidant activity using 2,2′- diphenyl-1-picrylhydrazyl, 2,2′- azino-bis(3-ethylbenzothiazoline-6-sulphonic acid radical inhibition systems. The extracts were also tested for their in vitro antimitotic activity in Allium cepa root and antiproliferative activity using the yeast model and five human cell lines (MCF-7, HOP-62, MOLT-4, HCT-15 and PRO. Result and Conclusion: The mitotic index for SCH and SEE was found to be 12.01 ± 1.34 and 12.99 ± 0.25 mg/mL, respectively. The IC 50 value in the antiproliferative assay was found to be 30.14-35.36 mg/mL for SCH and SEE respectively. Both SCH and SEE extracts showed significant antimitotic and antiproliferative activity when compared to the standard methothreaxate, vincreastine and adriamycin. Among the extracts, SEE showed strong inhibition against MCF-7 and MOLT-4 cell lines at concentration <30 μg/mL. Phytochemical analysis of extracts indicated the presence of β-sitosterol, gallic acid and catechin. Based on these results, it is concluded that T. indicum may be a good candidate for the treatment of a variety of cancer. Thus, its traditional use is validated.

  2. A 30-month prospective study on the treatment of retinoblastoma in the Gabriel Toure Teaching Hospital, Bamako, Mali.

    Science.gov (United States)

    Boubacar, Togo; Fatou, Sylla; Fousseyni, Traoré; Mariam, Sylla; Fatoumata, Dicko-Traoré; Toumani, Sidibé; Abdoul-Aziz, Diakité; Marouf, Keïta Mamadou

    2010-04-01

    Retinoblastoma is one of the most common malignant tumours among children in Africa. However, very few studies on this disease have been published, especially studies from French-speaking countries in Africa. Prospective study over a period of 30 months from 1 January 2005 to 30 June 2007 on all cases of retinoblastoma diagnosed and treated in the Paediatric Oncology Unit of the Gabriel Touré Hospital in Bamako, Mali. Treatment was two courses of pre-operative chemotherapy (cyclophosphamide, adriamycine and vincristine), enucleation for many patients, and then two courses of adjuvant chemotherapy with the same drugs. During the study period, 55 cases of retinoblastoma were treated, which represents 33.1% of all the solid tumours, coming second in frequency after lymphomas (39.7%). The mean age of the patients was 4.2 years. Boys were the most affected, with a sex ratio of 2:1. Forty-nine mothers (89.1%) and 46 fathers (83.6%) had no formal education. Thirty-seven children (67.3%) were from rural areas. Unilateral cases were predominant (49 cases (89.1%)). Ten cases (10.9%) were bilateral. Exophthalmos was the leading symptom (30 cases (54.5%)). The survival rate at 30 months was 56% with 18% lost at follow-up. Mortality as a result of retinoblastoma remains high in our region because diagnosis is always late and it is difficult to follow-up the patients. Education of healthcare workers and raising awareness in the general population would improve the survival rate of retinoblastoma patients in Africa.

  3. Radiation Therapy Overcomes Adverse Prognostic Role of Cyclooxygenase-2 Expression on Reed-Sternberg Cells in Early Hodgkin Lymphoma

    Energy Technology Data Exchange (ETDEWEB)

    Mestre, Francisco [Service of Radiation Therapy, University Hospital Son Espases, Instituto de Investigación Sanitaria de Palma, Palma de Mallorca (Spain); Gutiérrez, Antonio, E-mail: antoniom.gutierrez@ssib.es [Service of Hematology, University Hospital Son Espases, Instituto de Investigación Sanitaria de Palma, Palma de Mallorca (Spain); Rodriguez, Jose [MD Anderson Cancer Center, Madrid (Spain); Ramos, Rafael [Service of Pathology, University Hospital Son Espases, Instituto de Investigación Sanitaria de Palma, Palma de Mallorca (Spain); Garcia, Juan Fernando [Spanish National Cancer Research Centre, Madrid (Spain); Martinez-Serra, Jordi [Service of Hematology, University Hospital Son Espases, Instituto de Investigación Sanitaria de Palma, Palma de Mallorca (Spain); Casasus, Marta; Nicolau, Cristina [Service of Radiation Therapy, Policlinica Miramar, Palma de Mallorca (Spain); Bento, Leyre; Herraez, Ines [Service of Hematology, University Hospital Son Espases, Instituto de Investigación Sanitaria de Palma, Palma de Mallorca (Spain); Lopez-Perezagua, Paloma [Service of Radiology, IDISPA, Palma de Mallorca (Spain); Daumal, Jaime [Service of Nuclear Medicine, IDISPA, Palma de Mallorca (Spain); Besalduch, Joan [Service of Hematology, University Hospital Son Espases, Instituto de Investigación Sanitaria de Palma, Palma de Mallorca (Spain)

    2015-05-01

    Purpose: To analyze the role of radiation therapy (RT) on the adverse prognostic influence of cyclooxygenase-2 (COX-2) expression on Reed-Sternberg (RS) cells, in the setting of early Hodgkin lymphoma (HL) treated with ABVD (adriamycin, vinblastine, bleomycin, dacarbazine). Methods and Materials: In the present study we retrospectively investigated the prognostic value of COX-2 expression in a large (n=143), uniformly treated early HL population from the Spanish Network of HL using tissue microarrays. Univariate and multivariate analyses were done, including the most recognized clinical variables and the potential role of administration of adjuvant RT. Results: Median age was 31 years; the expression of COX-2 defined a subgroup with significantly worse prognosis. Considering COX-2{sup +} patients, those who received RT had significantly better 5-year progression-free survival (PFS) (80% vs 54% if no RT; P=.008). In contrast, COX-2{sup −} patients only had a modest, nonsignificant benefit from RT in terms of 5-year PFS (90% vs 79%; P=.13). When we compared the outcome of patients receiving RT considering the expression of COX-2 on RS cells, we found a nonsignificant 10% difference in terms of PFS between COX-2{sup +} and COX-2{sup −} patients (P=.09), whereas the difference between the 2 groups was important (25%) in patients not receiving RT (P=.04). Conclusions: Cyclooxygenase-2 RS cell expression is an adverse independent prognostic factor in early HL. Radiation therapy overcomes the worse prognosis associated with COX-2 expression on RS cells, acting in a chemotherapy-independent way. Cyclooxygenase-2 RS cell expression may be useful for determining patient candidates with early HL to receive consolidation with RT.

  4. Microwave-Assisted Facile Synthesis, Anticancer Evaluation and Docking Study of N-((5-(Substituted methylene amino)-1,3,4-thiadiazol-2-yl)methyl) Benzamide Derivatives.

    Science.gov (United States)

    Tiwari, Shailee V; Siddiqui, Sumaiya; Seijas, Julio A; Vazquez-Tato, M Pilar; Sarkate, Aniket P; Lokwani, Deepak K; Nikalje, Anna Pratima G

    2017-06-15

    In the present work, 12 novel Schiff's bases containing a thiadiazole scaffold and benzamide groups coupled through appropriate pharmacophore were synthesized. These moieties are associated with important biological properties. A facile, solvent-free synthesis of a series of novel 7(a-l) N-((5-(substituted methylene amino)-1,3,4-thiadiazol-2-yl)methyl) benzamide was carried out under microwave irradiation. Structures of the synthesized compounds were confirmed by IR, NMR, mass spectral study and elemental analysis. All the synthesized hybrids were evaluated for their in vitro anticancer activity against a panel of four human cancer cell lines, viz. SK-MEL-2 (melanoma), HL-60 (leukemia), HeLa (cervical cancer), MCF-7 (breast cancer) and normal breast epithelial cell (MCF-10A) using 3-(4,5-dimethythiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay method. Most of the synthesized compounds exhibited promising anticancer activity, showed comparable GI50 values comparable to that of the standard drug Adriamycin. The compounds 7k, 7l, 7b, and 7a were found to be the most promising anticancer agents in this study. A molecular docking study was performed to predict the probable mechanism of action and computational study of the synthesized compounds 7(a-l) was performed to predict absorption, distribution, metabolism, excretion and toxicity (ADMET) properties, by using QikProp v3.5 (Schrödinger LLC). The results showed the good oral drug-like behavior of the synthesized compounds 7(a-l).

  5. Predictive role of GSTP1-containing exosomes in chemotherapy-resistant breast cancer.

    Science.gov (United States)

    Yang, Su-Jin; Wang, Dan-Dan; Li, Jian; Xu, Han-Zi; Shen, Hong-Yu; Chen, Xiu; Zhou, Si-Ying; Zhong, Shan-Liang; Zhao, Jian-Hua; Tang, Jin-Hai

    2017-08-05

    Anthracycline/taxane-based chemotherapy regimens are usually used as neoadjuvant chemotherapies to decrease tumour size and prevent metastasis of advanced breast cancer. However, patients have a high risk of developing chemo-resistance during treatment through still unknown mechanisms. Glutathione S-transferase P1 (GSTP1), which belongs to the family of phase II metabolic enzymes, has been reported to function in detoxifying several anti-cancer drugs by conjugating them with glutathione. Previous studies have identified GSTP1 as a predictor of prognosis and chemo-resistance in breast cancer patients, but the mechanisms governing GSTP1-dependent drug resistance are still unclear. We have found that GSTP1 expression is much higher in adriamycin-resistant cells and their corresponding exosomes. The role of GSTP1-containing exosomes in conferring drug resistance was analysed through cell apoptosis and immunofluorescence staining assays. Furthermore, we analysed 42 cases of paired breast cancer tissues collected before and after anthracycline/taxane-based neoadjuvant chemotherapy by immunohistochemistry. Higher GSTP1 expression was shown in the progressive disease (PD)/stable disease (SD) group than in the partial response (PR)/complete response (CR) group both in the samples collected before and after the chemotherapy treatment. Interestingly, GSTP1 partly re-localized from the cell nucleus to the cytoplasm upon treatment, and similar results were obtained for the exosomal marker Tumour susceptibility gene 101 protein (TSG101), which also increased in the cytoplasm after chemotherapy. After analysing the serum exosomes of 30 patients treated with anthracycline/taxane-based neoadjuvant chemotherapy, we discovered that the levels of GSTP1 in exosomes from patients in the PD/SD group were significantly higher than those in the PR/CR group. Here, for the first time, we investigated a novel role for GSTP1-containing exosomes and their capability to transfer drug resistance

  6. The choice of regimens based on bortezomib for patients with newly diagnosed multiple myeloma.

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    Jingsong He

    Full Text Available INTRODUCTION: Bortezomib has significantly improved multiple myeloma (MM response rates, but strategies for choosing bortezomib-based regimens for initial MM therapy are not standardized. Here, we describe four bortezomib-based therapies in Chinese MM patients to determine the optimal chemotherapeutic approach. METHODS: Newly diagnosed symptomatic MM patients at three hematological centers between February 1, 2006 and May 31, 2013 were treated with therapies including bortezomib plus dexamethasone (PD or combinations of PD with either adriamycin (PAD, cyclophosphamide (PCD or thalidomide (PTD for every 28 days. RESULTS: The overall response rate of all the 215 eligible patients was 90.2%. The ORR for PCD, PAD, PTD and PD were 97.4%, 93.2%, 85.3% and 77.8% while the effects with VGPR or better were 63.7%, 62.7%, 44.2% and 37.8%, respectively. The effect of ORR, VGPR and CR/nCR for the PCD regimen was better than the PD protocol. Median PFS for all patients was 29.0 months with significant differences observed among treatment groups. Median OS of all the patients was not reached, but three-drug combinations were superior to PD alone. Frequently observed toxicities were neutropenia, thrombocytopenia, fatigue, infection, herpes zoster, and peripheral neuropathy. The incidence of peripheral neuropathy (PN in PTD group was significantly higher than other three groups, especially grade 2-3 PN. Treatment with anti-viral agent acyclovir significantly reduced the incidence of herpes zoster. CONCLUSIONS: Our experience indicated that bortezomib-based regimens were effective and well-tolerated in the Chinese population studied; three-drug combinations PCD, PAD were superior to PD, especially with respect to PCD.

  7. Evaluation of low-dose thalidomide as induction and maintenance therapy in patients with multiple myeloma not eligible for stem cell transplantation.

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    Aznab, Mozaffar; Rezaei, Mansour; Navabi, Jafar; Moieni, Ali

    2017-04-01

    The role of thalidomide in induction and long-term maintenance therapy in patients with multiple myeloma not eligible for stem cell transplantation remains unclear. The aim of the present study was to evaluate the effect of low-dose thalidomide as induction therapy and as maintenance therapy for 24 months in patients with a complete remission after the induction chemotherapy and to monitor the survival and relapse rates. Between October 2005 and September 2013, 50 patients with multiple myeloma received six courses of Cyclophosphamide-Vincristine Adriamycin and Dexamethazone (c-VAD) and pamidronate, and thalidomide 100 mg daily during induction, then thalidomide 100 mg daily for 24 months as maintenance. The effects of thalidomide were assessed objectively and subjectively. Whenever necessary, electromyography and nerve capacity volume were performed monthly for 6 months, then once every 3 months until the end of treatment. Primary response was 96% (CR or very good PR in 48/50 patients). Fifteen out of the remaining 48 patients relapsed during the follow-up period. Nine out of the 15 patients who relapsed showed very good partial response to treatment and four patients showed partial response. Survival rate was 81% in these patients. The primary outcome measures showed a mean and median progression-free survival of 33 and 27 months, respectively, and a mean and median overall survival of 43 and 39 months, respectively. Low-dose thalidomide during induction therapy combined with conventional chemotherapy and a 2-year maintenance may be effective in preventing the relapse and improving the overall survival. © 2015 Wiley Publishing Asia Pty Ltd.

  8. Treatment outcome and prognostic factor analysis in transplant-eligible Chinese myeloma patients receiving bortezomib-based induction regimens including the staged approach, PAD or VTD

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    Chim Chor

    2012-06-01

    Full Text Available Abstract Background We have reported promising outcomes using a staged approach, in which bortezomib/thalidomide/dexamethasone was used only in 14 patients with suboptimal response to VAD (vincristine/adriamycin/dexamethasone before autologous stem cell transplantation (ASCT. Here we compared the outcomes of the staged approach with frontline PAD (bortezomib/doxorubicin/dexamethasone or VTD (bortezomib/thalidomide/dexamethasone induction, and analysed prognostic factors for outcome. Patients and methods Ninety-one transplant-eligible Chinese patients received three induction regimens prior to ASCT [staged approach (N = 25, PAD (N = 31, VTD (N = 35]. and received thalidomide maintenance for 2 years post-ASCT. Results 43 (47.3% patients had International Staging System (ISS III disease. By an intention-to-treat analysis, the overall CR/nCR rate were 37.4% post-induction, and 62.6% post-ASCT. Five-year overall (OS and event-free (EFS survivals were 66% and 45.1%. There was no difference of the post-induction CR/nCR rate, EFS or OS between patients induced by these three regimens. Moreover, ISS III disease did not affect CR/nCR rates. Multivariate analysis showed that ISS and post-ASCT CR/nCR impacted OS while ISS and post-induction CR/nCR impacted EFS. Conclusions These three induction regimens produced comparable and favorable outcomes in myeloma. The unfavorable outcome of ISS stage III persisted despite upfront/early use of bortezomib. CR/nCR predicted favorable survivals.

  9. Clinical evaluation of reduced MIBG uptake in the infero-posterior segments

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    Terada, Kouji [Kyoto Prefectural Univ. of Medicine (Japan)

    1999-07-01

    The quantitative assessment of the reduced uptake of {sup 123}I-MIBG in the in fero-posterior segments was investigated. The subjects were 135 patients with non-ischemic heart disease (AR: aortic regurgitation, MR: mitral regurgitation, DCM: dilated cardiomyopathy, HCM: hypertrophic cardiomyopathy, ADR: adriamycin-induced myocardial damage, HHD: hypertensive heart disease) who underwent MIBG myocardial scintigraphy at rest. Anterior planar and SPECT were obtained initial images and delayed images. The heart-to-mediastinum activity ratio (H/M) was calculated from the delayed planar image, and the mean MIBG clearance was calculated with bull`s eye displays obtained from the initial and the delayed SPECT images. The bull`s eye display, obtained from the delayed SPECT images was evaluated by generating a blacked out map which exhibited regions with reduced % uptake under mean -2 SD of normal controls. The blacked out regions involved the infero-posterior segments and were closely resembled to the sector form. The central angle of this sector was named the angle of defect (AOD). This AOD was compared with H/M, the clearance, the NYHA class and echocardiographic findings of the patients. AOD was significantly correlated with both H/M and the clearance in each heart disease, and AOD was significantly higher in NYHA class III than in class II and higher in class II than in class I. AOD was significantly correlated with the end-systolic dimension, the atrial dimension and the ejection fraction in patients with AR, MR and DCM, respectively. H/M and the clearance have been widely used as quantitative indices in MIBG myocardial scintigraphy. (K.H.)

  10. Inhibition of SKP2 Sensitizes Bromocriptine-Induced Apoptosis in Human Prolactinoma Cells.

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    Huang, Jinxiang; Zhang, Fenglin; Jiang, Lei; Hu, Guohan; Sun, Wei; Zhang, Chenran; Ding, Xuehua

    2017-04-01

    Prolactinoma (prolactin-secreting pituitary adenoma) is one of the most common estrogen-related functional pituitary tumors. As an agonist of the dopamine D2 receptor, bromocriptine is used widely to inhibit prolactinoma progression. On the other hand, it is not always effective in clinical application. Although a dopamine D2 receptor deficiency contributes to the impaired efficiency of bromocriptine therapy to some extent, it is unknown whether there some other underlying mechanisms leading to bromocriptine resistance in prolactinoma treatment. That is the main point addressed in this project. Human prolactinoma samples were used to analyze the S-phase kinase associated protein 2 (SKP2) expression level. Nutlin-3/adriamycin/cisplatin-treated GH3 and MMQ cells were used to analyze apoptosis in SKP2 overexpression or knockdown cells. SKP2 expression and the interaction partners of SKP2 were also detected after a bromocriptine treatment in 293T. Apoptosis was analyzed in C25 and bromocriptine-treated GH3 cells. Compared to normal pituitary samples, most prolactinoma samples exhibit higher levels of SKP2 expression, which could inhibit apoptosis in a p53-dependent manner. In addition, the bromocriptine treatment prolonged the half-life of SKP2 and resulted in SKP2 overexpression to a greater extent, which in turn compromised its pro-apoptotic effect. As a result, the bromocriptine treatment combined with C25 (a SKP2 inhibitor) led to the maximal apoptosis of human prolactinoma cells. These findings indicated that SKP2 inhibition sensitized the prolactinoma cells to bromocriptine and helped promote apoptosis. Moreover, a combined treatment of bromocriptine and C25 may contribute to the maximal apoptosis of human prolactinoma cells.

  11. Augmented Berlin-Frankfurt-Münster Therapy in Adolescents and Young Adults (AYA) with Acute Lymphoblastic Leukemia (ALL)

    Science.gov (United States)

    Rytting, Michael E; Thomas, Deborah A; O'Brien, Susan M; Ravandi-Kashani, Farhad; Jabbour, Elias J; Franklin, Anna R; Kadia, Tapan M; Pemmaraju, Naveen; Daver, Naval G.; Ferrajoli, Alessandra; Garcia-Manero, Guillermo; Konopleva, Marina Y; Cortes, Jorge E; Borthakur, Gautham; Garris, Rebecca; Cardenas-Turanzas, Maria; Schroeder, Kurt; Jorgensen, Jeffrey L; Kornblau, Steven M; Kantarjian, Hagop M.

    2014-01-01

    Background Various trials report improved outcomes for adolescents and young adults (AYA) with acute lymphoblastic leukemia (ALL) treated with pediatric- based regimens. This prompted the investigation of the pediatric Augmented Berlin-Frankfurt-Münster (ABFM) regimen in AYA patients. Results were compared with the hyper–fractionated cyclophosphamide, vincristine, Adriamycin and dexamethasone (hyper-CVAD) regimen in a similar population. Methods Eighty-five patients age 12 to 40 years with Philadelphia chromosome- (Ph) negative ALL were treated with ABFM from 10/2006 through 4/2012. Their outcome was compared to 71 historical AYA patients treated with hyper-CVAD from our institution. Patient and disease characteristics, as well as status of minimal residual disease (MRD), were analyzed for their impact on outcomes. Results The complete remission (CR) rate with ABFM was 94%. The 3-year complete remission duration (CRD) and overall survival (OS) rates were 70% and 74%, respectively. The 3-year CRD and OS were 72% and 85%, respectively, with age ≤ 21 years, and 69% and 60%, respectively, with age 21-40 years. Initial white blood cell count was an independent predictive factor of OS and CRD. The MRD status on Day 29 and Day 84 of therapy were also predictive of long-term outcomes. Severe regimen toxicities included transient hepatotoxicity in 35-39%, pancreatitis in 11%, osteonecrosis in 11%, and thrombosis in 22%. The 3-year OS rate was 74% with ABFM versus 71% with hyper-CVAD; the 3-year CRD rate was 70% with ABFM versus 66% with hyper-CVAD. Conclusion ABFM was tolerable in AYA patients with ALL but was not associated with significant improvements in CRD and OS compared with hyper-CVAD. PMID:25042398

  12. [Efficacy and safety study of subcutaneous injection of bortezomib in the treatment of de novo patients with multiple myeloma].

    Science.gov (United States)

    Liu, Hui; Fu, Cheng-cheng; Xue, Sheng-li; Li, Wei-yang; Wu, Qian; Gu, Bin; Jin, Song; Zhu, Xia-ming; Zhao, Su-fang; Xin, Xue; Ma, Ling; Sun, Ai-ning; Wu, De-pei

    2013-10-01

    To explore the efficacy and safety of subcutaneous injection of bortezomib in the treatment of de novo multiple myeloma (MM) patients. A total of 36 MM patients treated with bortezomib, adriamycin and dexamethasone (PAD) from January 2012 to April 2013 were analyzed. Among them, 18 received improved PAD (improved PAD group) with the subcutaneous injection of bortezomib, another 18 received conventional PAD (PAD group). The efficacy and safety of two groups were analyzed. Except 4 cases can not be assessed, 32 patients were evaluated. Of 32 cases, 19(59.4%) achieved complete remission (CR) or very good partial remission (VGPR) after induction therapy, which were 61.1% and 57.1% for PAD group and improved PAD group, respectively (P=1.000). No significant difference between the time to achieve maximum effectiveness in two groups was detected. In the PAD group, one patient (5.6%) died of serious lung infection and eight (44.4%) experienced grade 3 or higher adverse events, while only one (5.6%) discontinued treatment in improved PAD group due to similar toxicity. Compared to PAD group, grade 3 or worse adverse events was significantly reduced in improved PAD group, the most common symptoms were leucopenia (33.3% vs 61.1%, P=0.086), thrombocytopenia (50.0% vs 61.1%), anaemia (27.8% vs 16.7%), infection (16.7% vs 50.0%, P=0.075), diarrhea (5.6% vs 33.3%, P=0.088), peripheral neuropathy(0 vs 27.8%, P=0.045). The improved PAD regimen by changing bortezomib from intravenous administration to subcutaneous injection significantly reduced adverse events, improved the safety of clinical application of bortezomib without affecting curative effect, and had great progress.

  13. Feasibility of olanzapine, multi acting receptor targeted antipsychotic agent, for the prevention of emesis caused by continuous cisplatin- or ifosfamide-based chemotherapy.

    Science.gov (United States)

    Bun, Seiko; Yonemori, Kan; Akagi, Toru; Noguchi, Emi; Shimoi, Tatsunori; Shimomura, Akihiko; Yunokawa, Mayu; Shimizu, Chikako; Fujiwara, Yasuhiro; Makino, Yoshinori; Hayashi, Yoshikazu; Tamura, Kenji

    2017-07-21

    Background To determine the feasibility and efficacy of olanzapine, which is approved by the Pharmaceuticals and Medical Devices Agency as multi acting receptor targeted antipsychotic agent of the thienobenzodiazepine class, for prevention of chemotherapy-induced nausea and vomiting (CINV) in patients undergoing continuous five-day chemotherapy. Patients and methods This study was a prospective dose escalation study at a single center (UMIN ID: UMIN000015386). Patients received a combination of adriamycin and ifosfamide (AI) or a combination of bleomycin, etoposide, and cisplatin (BEP). On days 1-5, all patients received intravenous granisetron (1 mg) and intravenous dexamethasone sodium phosphate (24 mg). Olanzapine was administrated on day-1 to day5 at bedtime. The dose of olanzapine followed a dose-escalation scheme, with monitoring of safety and tolerability at each dose. A 3 + 3 cohort design was used, with three to six patients per cohort. Results Nine patients were enrolled (three for each cohort). No patients experienced dose-limiting toxicity (DLT). The most frequent adverse events were dry mouth and constipation. In each cohort, the maximum severity of nausea was Grade 2, and no patients experienced a vomiting episode. Conclusion A 2.5 mg/day dosage of olanzapine is sufficient to prevent from CINV in Japanese patients receiving continuous five-day chemotherapy. A dose of 10 mg/day, which is recommended by international CINV guidelines, is also tolerated. If CINV is not controlled by an initial dose of 2.5 mg/day of olanzapine, dosage escalation is encouraged. Future studies should compare olanzapine with aprepitant.

  14. MicroRNA signatures and treatment response in patients with advanced classical Hodgkin lymphoma

    Science.gov (United States)

    Sánchez-Espiridión, Beatriz; Martín-Moreno, Ana M.; Montalbán, Carlos; Figueroa, Vianihuini; Vega, Francisco; Younes, Anas; Medeiros, L. Jeffrey; Alvés, Francisco J.; Canales, Miguel; Estévez, Mónica; Menarguez, Javier; Sabín, Pilar; Ruiz-Marcellán, María C.; Lopez, Andrés; Sánchez-Godoy, Pedro; Burgos, Fernando; Santonja, Carlos; López, José L.; Piris, Miguel A.; Garcia, Juan F.

    2017-01-01

    Summary Although specific microRNA (miRNA) signatures in classical Hodgkin lymphoma (cHL) have been proposed, their relationship with clinical outcome remains unclear. Despite treatment advances, a substantial subset of patients with advanced cHL are refractory to standard therapies based on adriamycin and its variants. Global miRNA expression data of 29 advanced cHL patients and five cHL-derived cell lines were used to identify profiles from Hodgkin-Reed-Sternberg (HRS) cells and their non-tumoural microenvironment. A cHL-miRNA signature was identified with 234 miRNAs differentially expressed. A subset of these miRNAs was associated with outcome and selected for study in an independent set of 168 cHL samples using quantitative reverse transcription polymerase chain reaction. Multivariate Cox regression analyses including cross-validation with failure-free survival (FFS) as clinical endpoint revealed a miRNA signature with MIR21, MIR30E, MIR30D and MIR92B* that identified two risk-groups with significant differences in 5-year FFS (81% vs. 35% 7%; P < 0·001). Additionally, functional silencing of MIR21 and MIR30D in L428 cells showed increased sensitivity to doxorubicin-induced apoptosis, pointing towards abnormalities of mitochondrial intrinsic and TP53-CDKN1A pathways as related to miRNA deregulation in cHL. These results suggest that clinical outcome in cHL is associated with a specific miRNA signature. Moreover, functional analyses suggest a role for MIR21 and MIR30D in cHL pathogenesis and therapeutic resistance. PMID:23725219

  15. Effects of long-term ingestion of white tea on oxidation produced by aging and acute oxidative damage in rats.

    Science.gov (United States)

    Espinosa Ruiz, Cristóbal; Cabrera, Lorena; López-Jiménez, José Ángel; Zamora, Salvador; Pérez-Llamas, Francisca

    2017-09-19

    The infusion tea extracted from the leaves of the plant Camellia sinensis can be used in the prevention of cancer, cardiovascular and neurodegenerative diseases, and aging, while adriamycin (ADR) is an anticancer drug that increases oxidative stress in cells. The present study evaluated the protective effect of the long-term consumption of white tea used at two different doses against the oxidative stress produced by aging and acute oxidation caused ADR treatment. At wearing, rats received distilled water (control), or 0.15 (dose 1) or 0.45 mg (dose 2) of solid tea extract/kilogram body weight in their drink. At 12 months, about half of the rats of each group were injected with a bolus of ADR, and six rats of the control group with an injection of saline solution and sacrificed. The rest of the animals continued in their cages until 24 months of age, when they were sacrificed. Lipid and protein oxidation of liver and brain microsomes was analyzed by measuring hydroperoxide and carbonyl levels. White tea consumption for 12 months at a non-pharmacological dose was seen to reverse the oxidative damage caused by ADR in both liver and brain, while the consumption of white tea for 20 months at a non-pharmacological dose had no effect on carbonyl or hydroperoxides in these tissues. The long-term ingestion of white tea protected tissues from acute oxidative stress but did not affect chronic oxidative agents such aging.

  16. Sentinel lymph node biopsy using dye alone method is reliable and accurate even after neo-adjuvant chemotherapy in locally advanced breast cancer - a prospective study

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    Mishra Ashwani

    2011-02-01

    Full Text Available Abstract Background Sentinel lymph node biopsy (SLNB is now considered a standard of care in early breast cancers with N0 axillae; however, its role in locally advanced breast cancer (LABC after neo-adjuvant chemotherapy (NACT is still being debated. The present study assessed the feasibility, efficacy and accuracy of sentinel lymph node biopsy (SLNB using "dye alone" (methylene blue method in patients with LABC following NACT. Materials and methods Thirty, biopsy proven cases of LABC that had received three cycles of neo-adjuvant chemotherapy (cyclophosphamide, adriamycin, 5-fluorouracil were subjected to SLNB (using methylene blue dye followed by complete axillary lymph node dissection (levels I-III. The sentinel node(s was/were and the axilla were individually assessed histologically. The SLN accuracy parameters were calculated employing standard definitions. The SLN identification rate in the present study was 100%. The sensitivity of SLNB was 86.6% while the accuracy was 93.3%, which were comparable with other studies done using dual lymphatic mapping method. The SLN was found at level I in all cases and no untoward reaction to methylene blue dye was observed. Conclusions This study confirms that SLNB using methylene blue dye as a sole mapping agent is reasonably safe and almost as accurate as dual agent mapping method. It is likely that in the near future, SLNB may become the standard of care and provide a less morbid alternative to routine axillary lymph node dissection even in patients with LABC that have received NACT.

  17. [Incidence and risk factors of acute hepatic failure after transcatheter arterial chemoembolization for hepatocellular carcinoma].

    Science.gov (United States)

    Jeon, Sang Hoon; Park, Kyung Sik; Kim, Young Hwan; Shin, Yo Sig; Kang, Min Kyoung; Jang, Byoung Kuk; Chung, Woo Jin; Cho, Kwang Bum; Hwang, Jae Seok

    2007-09-01

    Although transcatheter arterial chemoembolization (TACE) is a major treatment modality for unresectable hepatocellular carcinoma (HCC), acute hepatic failure after TACE is not rare. However, reports dealing with this important complication are not good enough and results are often variable. The purpose of this study was to evaluate the incidence and associated risk factors of acute hepatic failure after TACE. From January 2001 to November 2004, six hundred and thirty-two TACE sessions were performed in 377 patients (294 men and 83 women). Adriamycin mixed lipiodol solution and gelfoam were used for TACE. Various clinical and radiological factors before and after the procedure were reviewed retrospectively. Univariate and multivariate analyses were performed to evaluate the risk factors associated with the development of acute hepatic failure after TACE. Acute hepatic failure occurred in 76 (12.0%) of the 632 TACE sessions within 14 days. Univariate analysis revealed that Child-Pugh class, 1st TACE, total bilirubin level, number of involved segments, total size of tumor, presence of right portal vein thrombosis (PVT) or main PVT, involvement of segment 1, 5, 6, 7, modified UICC stage, and doses of chemotherapeutic agent were significantly different between the patients with or without hepatic failure after TACE. Among them, elevated total bilirubin (p=0.001, E (beta)=1.449), presence of right (p=0.035, E (beta)=2.109) or main (p=0.011, E (beta)=4.067) PVT were independently associated factors in multivariate analysis. The incidence of acute hepatic failure after TACE was 12.0%. Elevated bilirubin level and portal vein thrombosis could be considered as the predictive factors for acute hepatic failure after TACE in HCC patients.

  18. EPSIN 3, A Novel p53 Target, Regulates the Apoptotic Pathway and Gastric Carcinogenesis

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    Jinichi Mori

    2017-03-01

    Full Text Available BACKGROUND & AIM: p53 activation by cellular stresses induces the transcription of hundreds of its target genes. To elucidate the entire picture of its downstream pathway, we screened a cDNA microarray dataset of adriamycin-treated HCT116 p53−/− or p53+/+ cells and identified EPSIN 3 as a novel p53 target. METHODS: Potential p53 binding sequences in the EPSIN 3 locus were evaluated by reporter and CHIP assays. To investigate the role of EPSIN 3 in the p53 downstream pathway, we assessed DNA damage-induced apoptosis in EPSIN 3-knockdown HCT116 cells or Epsin 3-deficient mice. In addition, we evaluated EPSIN 3 expression levels in various tissues, including gastric adenocarcinoma, human gastric mucosa with or without Helicobacter pylori infection, and mouse acute gastritis tissues induced by indomethacin. RESULTS: In response to DNA damage, p53 induced the expression of EPSIN 3 through the p53 binding elements in the EPSIN 3 promoter and the first intron. Knockdown of EPSIN 3 resulted in resistance to DNA damage-induced apoptosis both in vitro and in vivo. EPSIN 3 expression was down-regulated in gastric cancer tissues compared with normal tissues. In addition, Helicobacter pylori infection and indomethacin-induced acute gastritis repressed EPSIN 3 expression in gastric mucosa. CONCLUSIONS: EPSIN 3 is a novel p53 target and a key mediator of apoptosis. Chronic or acute mucosal inflammation as well as p53 inactivation induced down-regulation of EPSIN 3 and subsequently caused apoptosis resistance, which is a hallmark of cancer cells.

  19. The C-terminal region Mesd peptide mimics full-length Mesd and acts as an inhibitor of Wnt/β-catenin signaling in cancer cells.

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    Cuihong Lin

    Full Text Available While Mesd was discovered as a specialized molecular endoplasmic reticulum chaperone for the Wnt co-receptors LRP5 and LRP6, recombinant Mesd protein is able to bind to mature LRP5 and LRP6 on the cell surface and acts as a universal antagonist of LRP5/6 modulators. In our previous study, we found that the C-terminal region of Mesd, which is absent in sequences from invertebrates, is necessary and sufficient for binding to mature LRP6 on the cell surface. In the present studies, we further characterized the interaction between the C-terminal region Mesd peptide and LRP5/6. We found that Mesd C-terminal region-derived peptides block Mesd binding to LRP5 at the cell surface too. We also showed that there are two LRP5/6 binding sites within Mesd C-terminal region which contain several positively charged residues. Moreover, we demonstrated that the Mesd C-terminal region peptide, like the full-length Mesd protein, blocked Wnt 3A- and Rspodin1-induced Wnt/β-catenin signaling in LRP5- and LRP6- expressing cells, suppressed Wnt/β-catenin signaling in human breast HS578T cells and prostate cancer PC-3 cells, and inhibited cancer cell proliferation, although the full-length Mesd protein is more potent than its peptide. Finally, we found that treatment of the full-length Mesd protein and its C-terminal region peptide significantly increased chemotherapy agent Adriamycin-induced cytotoxicity in HS578T and PC-3 cells. Together, our results suggest that Mesd C-terminal region constitutes the major LRP5/6-binding domain, and that Mesd protein and its C-terminal region peptide have a potential therapeutic value in cancer.

  20. Excision repair cross-complementation group 1 protein expression predicts survival in patients with high-grade, non-metastatic osteosarcoma treated with neoadjuvant chemotherapy.

    Science.gov (United States)

    Hattinger, Claudia Maria; Michelacci, Francesca; Sella, Federica; Magagnoli, Giovanna; Benini, Stefania; Gambarotti, Marco; Palmerini, Emanuela; Picci, Piero; Serra, Massimo; Ferrari, Stefano

    2015-09-01

    To evaluate the clinical impact of excision repair cross-complementation group 1 (ERCC1) expression in high-grade osteosarcoma (OS). Immunohistochemistry was performed on biopsies from 99 OS patients enrolled in the ISG/OS-Oss training set or ISG/SSG1 validation set neoadjuvant chemotherapy protocols, based on the use of cisplatin, adriamycin, methotrexate, and ifosfamide. In the training set, ERCC1 positivity was found in eight of 31 (26%) patients, and was significantly associated with worse event-free survival (EFS) (P = 0.042) and overall survival (OVS) (P = 0.001). In the validation set, ERCC1 positivity was found in 22 of 68 (32%) patients, and its significant associations with poorer EFS (P = 0.028) and OVS (P = 0.022) were confirmed. Multivariate analyses performed on the whole patient series indicated that ERCC1 positivity was the only marker that was significantly associated with a higher risk of worse prognosis, in terms of both EFS and OVS (P = 0.013). Co-evaluation of ERCC1 and ABCB1 expression showed that patients who were positive for both markers had a significantly worse prognosis. The ERCC1 level at diagnosis is predictive for the outcome of patients with non-metastatic, high-grade OS treated with neoadjuvant chemotherapy, and co-evaluation with ABCB1 can identify high-risk groups of OS patients who are refractory to standard regimens. © 2015 John Wiley & Sons Ltd.

  1. [Application of the improved MTT assay in predicting the intrinsic drug resistance of liver cancer].

    Science.gov (United States)

    Li, Qian-yu; Wang, Yi; Yin, Zheng-feng; Wu, Meng-chao

    2007-01-30

    To investigate the role of the improved MTT assay in prediction of intrinsic drug resistance of liver cancer. The convenient MTT colorimetry was innovated to test the effects of 4'-epi-adriamycin (E-ADM), carboplatin (CBP), and 5-Fluorouracil(5-Fu), used alone or in combination, on 30 specimens of primary liver cancer without chemotherapy. All of the 30 paraffin-embedded tissues were assembled in a microarray. The used terminal concentrations of drugs were one twentieth those of the plasma peak concentrations calculated by using the liver cancer cells of the line SMMC-7721. The expression of P-glycoprotein (P-gp), multidrug resistant protein (MRP)-3, lung resistance-related protein (LRP), glutathione S-transferase (GST)-pi, and 2 kinds of cyclin-related protein: p16(INK4a) and p21WAF1, were detected by immunohistochemistry. Sixteen of the 30 specimens (53.3%) were drug-resistant and 14 of the 30 specimens (46.7%) were drug-sensitive. The sequence of drug -sensitivity was in the order of combination chemotherapy, E-ADM, 5-Fu, and CBP. The positive rate of P-gp in the drug-resistant group was 56.3%, significantly higher than that of the drug-sensitive group (14.3%, P improved MTT assay has been developed that is more scientific and worth spreading clinically. Intrinsic drug resistance of liver cancer is popular. P-gp is a good predictive marker in intrinsic drug resistance of liver cancer.

  2. Does Bleomycin Lung Toxicity Increase the Risk of Radiation Pneumonitis in Hodgkin Lymphoma?

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    Abou Yehia, Zeinab [Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Mikhaeel, George N. [Department of Clinical Oncology, Guy' s & St Thomas' Hospital, London (United Kingdom); Smith, Grace; Pinnix, Chelsea C.; Milgrom, Sarah A.; Tang, Chad; Jiang, Wen [Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Fanale, Michelle A.; Oki, Yasuhiro [Department of Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Shank, JoAnn H.; Horace, Trisha; Reddy, Jay [Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Akhtari, Mani [Department of Radiation Oncology, The University of Texas Medical Branch Hospitals, Galveston, Texas (United States); Gunther, Jillian R. [Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Suki, Tina [The University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Allen, Pamela K.; Turner, Shryll [Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Mawlawi, Osama [Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Dabaja, Bouthaina S., E-mail: bdabaja@mdanderson.org [Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas (United States)

    2016-12-01

    Purpose: Bleomycin pulmonary toxicity (BPT) is a well-known complication of treatment in patients with Hodgkin lymphoma (HL). We undertook the present study to investigate the risk of radiation pneumonitis (RP) in the setting of BPT and to determine the need for delay or omission of radiation therapy (RT) in these patients. Methods and Materials: We identified 123 HL patients treated with ABVD (Adriamycin, bleomycin, vinblastine, dacarbazine) followed by RT to the chest from January 2009 to December 2014. The medical records were reviewed for clinical, pathologic, and treatment information and toxicities. Our primary outcome was RP of any grade. Univariate and multivariate analyses were used to assess the association of BPT, baseline patient characteristics, and treatment variables with the incidence of RP. Results: A total of 123 patients were included, of whom 99 (80%) received consolidation intensity modulated RT after ABVD treatment. We identified 31 patients (25.2%) with BPT after frontline ABVD. Seventeen patients (13.8%) developed RP a median of 8 weeks (range 1-39) after RT completion. BPT did not correlate with the risk of developing RP (P=.36). We evaluated the RP outcomes with respect to the bleomycin to RT interval (≤6 weeks vs >6 weeks), and we found that this interval did not predict for RP risk (P=.60). Dosimetric parameters such as the volume covered by 5 Gy and the mean lung dose were analyzed. A volume covered by 5 Gy of >55% and mean lung dose >13.5 Gy increased the risk of RP by 1.14-fold (P=.002) and 4.24-fold (P=.007), respectively. Conclusions: The results of our study suggest that BPT does not increase the risk of developing RP. Furthermore, RT initiation does not need to be delayed after chemotherapy, except to allow for the completion of steroid therapy or clinical recovery from BPT.

  3. Antitumor activity of zoledronic acid in primary breast cancer cells determined by the ATP tumor chemosensitivity assay

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    Fehm Tanja

    2012-07-01

    Full Text Available Abstract Background The NeoAzure study has demonstrated that the use of the bisphosphonate zoledronic acid (Zol in the neoadjuvant setting increases the rate of complete response in primary breast cancer and therefore indicates direct antitumor activity. The purpose of this study was to compare the antitumor effect of Zol with standard chemotherapy in primary breast cancer cells using ATP-tumor chemosensitivity assay (ATP-TCA. Methods Breast cancer specimens were obtained from patients with breast cancer who underwent primary breast cancer surgery at the Department of Obstetrics and Gynecology, Tübingen, Germany, between 2006 through 2009. Antitumor effects of Zol, TAC (Docetaxel, Adriamycin, Cyclophosphamide and FEC (5-Fluorouracil, Epirubicin, Cyclophosphamide were tested in 116 fresh human primary breast cancer specimens using ATP-TCA. ATP-TCA results were analyzed with different cut-off levels for the half maximal inhibitory concentration (IC50, for IC90 and for the sensitivity index (IndexSUM. Each single agent or combination was tested at six doubling dilutions from 6.25, 12.5, 25, 50, 100, and 200% of test drug concentrations (TDC derived from the plasma peak concentrations determined by pharmacokinetic data. The assay was carried out in duplicate wells with positive and negative controls. Results The median IndexSUM value was lower for Zol than for the combined regimen FEC (36.8% and TAC (12.9%, respectively, indicating increased antitumor activity of Zol in primary breast cancer cells. The difference regarding Zol and FEC was significant (p  Conclusion Zoledronic acid has a strong antitumor effect on primary breast cancer cells in vitro which is equal or superior to commonly used chemotherapeutic regimens for treating breast cancer.

  4. Low-intensity focused ultrasound mediated localized drug delivery for liver tumors in rabbits.

    Science.gov (United States)

    Gong, Yuping; Wang, Zhigang; Dong, Guifang; Sun, Yang; Wang, Xi; Rong, Yue; Li, Maoping; Wang, Dong; Ran, Haitao

    2016-09-01

    To explore the antitumor effects of low-intensity focused ultrasound (LIFU) mediated localized drug delivery of adriamycin-microbubble-PLGA nanoparticle complexes on rabbits VX2 liver tumor. ADM-NMCs were prepared by covalent linking of ADM-PLGA nanoparticles (ADM-NPs) to the shell of the microbubbles. A fixed water bag filled with microbubbles was subjected to LIFU and non-focused ultrasound respectively, and the ultrasound images of which were recorded before and after ultrasonication. A total of 54 VX2 liver tumor-burdened rabbits were divided into six groups randomly, including control, ADM-NPs combined with LIFU, microbubbles combined with LIFU, ADM-NPs and microbubbles combined with LIFU, ADM-NMCs combined with LIFU and ADM-NMCs combined with Non-FUS. The tumor volume and volume inhibition rate (VIR) of tumor progression were calculated and compared. Apoptotic cells were labeled by terminal deoxyuridine nick end. Proliferating cell nuclear antigen was detected by immunohistochemistry. The median survival time of the animals were recorded and compared. ADM-NMCs were successfully prepared with an average diameter of 1721 nm. The highest VIR and apoptotic index (AI) were found in the group of ADM-NMCs combined with LIFU while the lowest proliferating index (PI) was simultaneously observed in this group. The median survival time of the rabbits in the ADM-NMCs combined with LIFU group was the longest (71days) among all groups. ADM-NMCs combined with LIFU could inhibit the rabbits VX2 liver tumor progress by delaying the tumor proliferation and accelerating apoptosis, which presents a novel process for liver tumor targeting chemotherapy.

  5. Carcinogen-induced mdr overexpression is associated with xenobiotic resistance in rat preneoplastic liver nodules and hepatocellular carcinomas.

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    Fairchild, C R; Ivy, S P; Rushmore, T; Lee, G; Koo, P; Goldsmith, M E; Myers, C E; Farber, E; Cowan, K H

    1987-11-01

    We have previously reported the isolation of a human breast cancer cell line resistant to doxorubicin (adriamycin; AdrR MCF-7 cells) that has also developed the phenotype of multidrug resistance (MDR). MDR in this cell line is associated with increased expression of mdr (P glycoprotein) gene sequences. The development of MDR in AdrR MCF-7 cells is also associated with changes in the expression of several phase I and phase II drug-detoxifying enzymes. These changes are remarkably similar to those associated with development of xenobiotic resistance in rat hyperplastic liver nodules, a well-studied model system of chemical carcinogenesis. Using an mdr-encoded cDNA sequence isolated from AdrR MCF-7 cells, we have examined the expression of mdr sequences in rat livers under a variety of experimental conditions. The expression of mdr increased 3-fold in regenerating liver. It was also elevated (3- to 12-fold) in several different samples of rat hyperplastic nodules and in four of five hepatomas that developed in this system. This suggests that overexpression of mdr, a gene previously associated with resistance to antineoplastic agents, may also be involved in the development of resistance to xenobiotics in rat hyperplastic nodules. In addition, although the acute administration of 2-acetylaminofluorene induced an 8-fold increase in hepatic mdr-encoded RNA, performance of a partial hepatectomy either before or after administration of 2-acetylaminofluorene resulted in a greater than 80-fold increase in mdr gene expression over that in normal untreated livers. This represents an important in vivo model system in which to study the acute regulation of this drug resistance gene.

  6. Genetic abnormalities in leukemia secondary to treatment in patients with Hodgkin's disease.

    Science.gov (United States)

    Salas, Consuelo; Pérez-Vera, Patricia; Frías, Sara

    2011-01-01

    Hodgkin's disease has been treated mainly with two chemotherapy schedules, MOPP (nitrogen mustard, Oncovin, procarbazine and prednisone), which includes alkylating agents, and ABVD (adriamycin, bleomycin, vinblastine and dacarbazine), which includes topoisomerase II inhibitors, either with or without radiation therapy. Due to the types of agents used, patients with Hodgkin's disease often develop secondary leukemias. The alkylating agents included in the MOPP scheme were the first drugs associated with the development of therapy-related myelodysplastic syndrome (t-MDS) and acute myeloid leukemia (t-AML); both entities are the result of the clonal selection of cells with accumulated genomic lesions induced by antineoplastic therapy. In patients who developed t-MDS and t-AML, eight alternative routes with specific cytogenetic and molecular changes have been identified, and the routes are related to the type of therapy, alkylating agents or DNA topoisomerase II inhibitors. At the cytogenetic level, patients treated with alkylating agents show deletion 5q/monosomy 5 and deletion 7q/monosomy 7; in contrast, those who were treated with topoisomerase II inhibitors show 11q23 translocations involving the MLL gene. At the molecular level, there are two types of mutations: Class I, which alter the RAS-BRAF signal transduction pathways and increase cell proliferation; Class II, which disrupt genes that encode transcription factors and NPM1 that are involved in cell differentiation, and the inactivation of p53 tumor suppressor gene. Knowledge of the genetic alterations in these conditions is important for the classification, treatment and prognosis of patients as well as essential for increasing the knowledge of the biology of these diseases, which leads to identifying potential therapeutic targets.

  7. A Pilot Study of IL2 in Drug-Resistant Idiopathic Nephrotic Syndrome.

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    Alice Bonanni

    Full Text Available Tregs infusion reverts proteinuria and reduces renal lesions in most animal models of nephrotic syndrome (i.e. Buffalo/Mna, Adriamycin, Promycin, LPS. IL2 up-regulates Tregs and may be an alternative to cell-therapy in this setting. To evaluate a potential role of IL2 as Tregs inducer and proteinuria lowering agent in human nephrotic syndrome we treated 5 nephrotic patients with 6 monthly cycles of low-dose IL2 (1x106 U/m2 first month, 1.5x106 U/m2 following months. The study cohort consisted of 5 children (all boys, 11–17 years resistant to all the available treatments (i.e. steroids, calcineurin inhibitors, mycophenolate, Rituximab. Participants had Focal Segmental Glomerulosclerosis (3 cases or Minimal Change Nephropathy (2 cases. IL2 was safe in all but one patient who had an acute asthma attack after the first IL2 dose and did not receive further doses. Circulating Tregs were stably increased (>10% during the whole study period in 2 cases while were only partially modified in the other two children who started with very low levels and partially responded to single IL2 Proteinuria and renal function were not modified by IL2 at any phase of the study. We concluded that low-dose IL2 given in monthly pulses is safe and modifies the levels of circulating Tregs. This drug may not be able to lower proteinuria or affect renal function in children with idiopathic nephrotic syndrome. We were unable to reproduce in humans the effects of IL2 described in rats and mice reducing de facto the interest on this drug in nephrotic syndrome.ClinicalTrials.gov NCT02455908.

  8. LPS nephropathy in mice is ameliorated by IL-2 independently of regulatory T cells activity.

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    Roberta Bertelli

    Full Text Available Immunosuppressive regulatory T cells (Tregs have been hypothesized to exert a protective role in animal models of spontaneous (Buffalo/Mna and/or drug induced (Adriamycin nephrotic syndrome. In this study, we thought to define whether Tregs can modify the outcome of LPS nephropathy utilizing IL-2 as inducer of tissue and circulating Tregs. LPS (12 mg/Kg was given as single shot in C57BL/6, p2rx7⁻/⁻ and Foxp3EGFP; free IL-2 (18.000 U or, in alternative, IL-2 coupled with JES6-1 mAb (IL-2/anti-IL-2 were injected before LPS. Peripheral and tissue Tregs/total CD4+ cell ratio, urinary parameters and renal histology were evaluated for 15 days. IL-2 administration to wild type mice had no effect on peripheral Tregs number, whereas a significant increase was induced by the IL-2/anti-IL-2 immunocomplex after 5 days. Spleen and lymph nodes Tregs were comparably increased. In p2rx7⁻/⁻ mice, IL-2/anti-IL-2 treatment resulted in increase of peripheral Tregs but did not modify the spleen and lymph nodes quota. LPS induced comparable and transient proteinuria in both wild type and p2rx7⁻/⁻ mice. Proteinuria was inhibited by co-infusion of human IL-2, with reduction at each phase of the disease (24 -48 and 72 hours whereas IL-2/anti-IL-2 produced weaker effects. In all mice (wild type and p2rx7⁻/⁻ and irrespective of treatment (IL-2, IL-2/anti-IL-2, LPS was associated with progressive signs of renal pathologic involvement resulting in glomerulosclerosis. In conclusion, IL-2 plays a transient protective effect on proteinuria induced by LPS independent of circulating or tissue Tregs but does not modify the outcome of renal degenerative renal lesions.

  9. A Pilot Study of IL2 in Drug-Resistant Idiopathic Nephrotic Syndrome.

    Science.gov (United States)

    Bonanni, Alice; Bertelli, Roberta; Rossi, Roberta; Bruschi, Maurizio; Di Donato, Armando; Ravani, Pietro; Ghiggeri, Gian Marco

    2015-01-01

    Tregs infusion reverts proteinuria and reduces renal lesions in most animal models of nephrotic syndrome (i.e. Buffalo/Mna, Adriamycin, Promycin, LPS). IL2 up-regulates Tregs and may be an alternative to cell-therapy in this setting. To evaluate a potential role of IL2 as Tregs inducer and proteinuria lowering agent in human nephrotic syndrome we treated 5 nephrotic patients with 6 monthly cycles of low-dose IL2 (1x106 U/m2 first month, 1.5x106 U/m2 following months). The study cohort consisted of 5 children (all boys, 11–17 years) resistant to all the available treatments (i.e. steroids, calcineurin inhibitors, mycophenolate, Rituximab). Participants had Focal Segmental Glomerulosclerosis (3 cases) or Minimal Change Nephropathy (2 cases). IL2 was safe in all but one patient who had an acute asthma attack after the first IL2 dose and did not receive further doses. Circulating Tregs were stably increased (>10%) during the whole study period in 2 cases while were only partially modified in the other two children who started with very low levels and partially responded to single IL2 Proteinuria and renal function were not modified by IL2 at any phase of the study. We concluded that low-dose IL2 given in monthly pulses is safe and modifies the levels of circulating Tregs. This drug may not be able to lower proteinuria or affect renal function in children with idiopathic nephrotic syndrome. We were unable to reproduce in humans the effects of IL2 described in rats and mice reducing de facto the interest on this drug in nephrotic syndrome. ClinicalTrials.gov NCT02455908.

  10. Transcatheter arterial chemoembolization of hepatocellular carcinoma in patients with celiac axis occlusion using pancreaticoduodenal arcade as a challenging alternative route.

    Science.gov (United States)

    Attia, Noha M; Othman, Moustafa H M

    2017-01-01

    Celiac axis occlusion is a challenging condition when catheterization of the hepatic artery is required for chemoembolization of hepatocellular carcinoma (HCC). As a result, the hepatic artery has to be catheterized through the pancreaticoduodenal arcades (PDA) and the gastroduodenal artery (GDA) from the superior mesenteric artery (SMA) which is a tortuous course with acute angles and small caliber branches. To assess new techniques for facilitating catheterization of the tortuous PDA and the GDA to reach the proper hepatic artery (PHA) and tumor-feeding branches in patients with celiac axis occlusion undergoing chemoembolization of HCC. The study included eleven patients all admitted to do transcatheter arterial chemoembolization (TACE) for treatment of unresectable HCC. During angiography occlusion of the celiac axis was diagnosed and hypertrophied PDA and GDA was noted in SMA angiography. Catheterization of the PDA was performed by preshaping of the micro-guide wire into a wide curve. Catheterization of the PHA was a challenge and was achieved by reshaping of the micro-guide wire or by looping technique. TACE was done after super selective catheterization of the tumor feeding artery using a mixture of 50 mg of adriamycin, 7cc of lipiodol and gelfoam. In the eleven patients with celiac artery occlusion, DSA showed complete celiac axis occlusion in all patients. Collateral arteries supplying the liver were readily evident via PDA and GDA from SMA. Successful catheterization of the PHA was achieved in all patients. Chemoembolization was performed to all patients after super selective catheterization of the feeding artery. Follow-up triphasic CT was performed in all patients, 9 patients showed good lipiodol trapping with no residual tumor enhancement. Two patients required another session of TACE. Chemoembolization of HCC through the PDA and the GDA using micro-guide wire preshaping technique and the microcatheter looping technique in patients with celiac axis

  11. Inhibition of Aerobic Glycolysis Represses Akt/mTOR/HIF-1α Axis and Restores Tamoxifen Sensitivity in Antiestrogen-Resistant Breast Cancer Cells.

    Science.gov (United States)

    Woo, Yu Mi; Shin, Yubin; Lee, Eun Ji; Lee, Sunyoung; Jeong, Seung Hun; Kong, Hyun Kyung; Park, Eun Young; Kim, Hyoung Kyu; Han, Jin; Chang, Minsun; Park, Jong-Hoon

    2015-01-01

    Tamoxifen resistance is often observed in the majority of estrogen receptor-positive breast cancers and it remains as a serious clinical problem in breast cancer management. Increased aerobic glycolysis has been proposed as one of the mechanisms for acquired resistance to chemotherapeutic agents in breast cancer cells such as adriamycin. Herein, we report that the glycolysis rates in LCC2 and LCC9--tamoxifen-resistant human breast cancer cell lines derived from MCF7--are higher than those in MCF7S, which is the parent MCF7 subline. Inhibition of key glycolytic enzyme such as hexokinase-2 resulted in cell growth retardation at higher degree in LCC2 and LCC9 than that in MCF7S. This implies that increased aerobic glycolysis even under O2-rich conditions, a phenomenon known as the Warburg effect, is closely associated with tamoxifen resistance. We found that HIF-1α is activated via an Akt/mTOR signaling pathway in LCC2 and LCC9 cells without hypoxic condition. Importantly, specific inhibition of hexokinase-2 suppressed the activity of Akt/mTOR/HIF-1α axis in LCC2 and LCC9 cells. In addition, the phosphorylated AMPK which is a negative regulator of mTOR was decreased in LCC2 and LCC9 cells compared to MCF7S. Interestingly, either the inhibition of mTOR activity or increase in AMPK activity induced a reduction in lactate accumulation and cell survival in the LCC2 and LCC9 cells. Taken together, our data provide evidence that development of tamoxifen resistance may be driven by HIF-1α hyperactivation via modulation of Akt/mTOR and/or AMPK signaling pathways. Therefore, we suggest that the HIF-1α hyperactivation is a critical marker of increased aerobic glycolysis in accordance with tamoxifen resistance and thus restoration of aerobic glycolysis may be novel therapeutic target for treatment of tamoxifen-resistant breast cancer.

  12. Low-dose carvedilol reduces transmural heterogeneity of ventricular repolarization in congestive heart failure.

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    Zhong, Jiang-hua; Chen, Xiao-pan; Yun, Mei-ling; Li, Wei-jing; Chen, Yan-fang; Yao, Zhen

    2007-08-01

    To study the effects of carvedilol on the transmural heterogeneity of ventricular repolarization in rabbits with congestive heart failure (CHF). Rabbits were randomly divided into 3 groups: control, CHF and carvedilol treated CHF group. Monophasic action potential duration (MAPD) in the 3 myocardial layers was simultaneously recorded. All the rabbits in the CHF group had signs of severe CHF. Compared with the control group, the mean blood pressure and cardiac output were significantly decreased, while peripheral resistance was significantly increased in the CHF group. This proved that the CHF model was successful created with adriamycin in this study. Compared to the control group, the ventricular fibrillation threshold (VFT) was remarkably decreased and all MAPD of the 3 myocardial layers were extended in rabbits with CHF. However, the extension of MAPD in the midmyocardium was more obvious. The transmural dispersion of repolarization (TDR) was significantly increased in CHF. Low-dose carvedilol (0.25 mg/kg, twice daily) had no effects on ventricular remodeling. Treatment with low-dose carvedilol significantly increased VFT. Although the MAPD of the 3 myocardial layers were further prolonged in the carvedilol treated CHF group, the prolongation of MAPD in the midmyocardium was shorter than those in the epicardium and endocardium. Treatment with low-dose carvedilol significantly decreased TDR in CHF. In the present study, the transmural heterogeneity of ventricular repolarization increased in the rabbits with CHF. Low-dose carvedilol decreased the transmural heterogeneity of ventricular repolarization in CHF, which may be related to its direct electrophysiological property rather than its effect on ventricular remodeling.

  13. AEG-1 is associated with hypoxia-induced hepatocellular carcinoma chemoresistance via regulating PI3K/AKT/HIF-1alpha/MDR-1 pathway.

    Science.gov (United States)

    Xie, Yong; Zhong, De-Wu

    2016-01-01

    Hypoxia is a common characteristic of hepatocellular carcinoma (HCC) associated with reduced response to chemotherapy, thus increasing the probability of tumor recurrence. Astrocyte elevated gene-1 (AEG-1) has been involved in a wide array of cancer progression including proliferation, chemoresistance, angiogenesis and metastasis, but its effect on HCC chemoresistance induced by hypoxia is unclear. In this study, expression of AEG-1 and multiple drug resistance (MDR-1) were examined in HCC using immunohistochemical staining and RT-PCR. Furthermore, their expression levels were detected in HCC HepG2 cells in normoxia or hypoxia via RT-PCR and Western blot assays. Specific shRNAs were used to silence AEG-1 expression in HepG2 cells. Results showed AEG-1 and MDR-1 expression were higher in HCC tissues than in adjacent normal tissues. Incubation of HepG2 cells in hypoxia increased expression of AEG-1 and MDR-1, compared to incubation in normoxia. Exposure to hypoxia blunted sensitivity of HepG2 cells to Adriamycin, 5-fluorouracil and cis-platinum, as evidenced by modest alterations in cell viability and apoptosis rate, however the sensitivity was elevated with AEG-1 knockdown. PI3K/AKT/HIF-1/MDR-1 pathway was attenuated following AEG-1 knockdown in hypoxia. Based on these data, it was suggested that AEG-1 is associated with hypoxia-induced hepatocellular carcinoma chemoresistance via regulating PI3K/AKT/HIF-1/MDR-1 pathway. This study uncovered a novel potential target for development of an effective therapy against hypoxia-induced HCC chemoresistance.

  14. Disruption of a GATA4/Ankrd1 signaling axis in cardiomyocytes leads to sarcomere disarray: implications for anthracycline cardiomyopathy.

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    Billy Chen

    Full Text Available Doxorubicin (Adriamycin is an effective anti-cancer drug, but its clinical usage is limited by a dose-dependent cardiotoxicity characterized by widespread sarcomere disarray and loss of myofilaments. Cardiac ankyrin repeat protein (CARP, ANKRD1 is a transcriptional regulatory protein that is extremely susceptible to doxorubicin; however, the mechanism(s of doxorubicin-induced CARP depletion and its specific role in cardiomyocytes have not been completely defined. We report that doxorubicin treatment in cardiomyocytes resulted in inhibition of CARP transcription, depletion of CARP protein levels, inhibition of myofilament gene transcription, and marked sarcomere disarray. Knockdown of CARP with small interfering RNA (siRNA similarly inhibited myofilament gene transcription and disrupted cardiomyocyte sarcomere structure. Adenoviral overexpression of CARP, however, was unable to rescue the doxorubicin-induced sarcomere disarray phenotype. Doxorubicin also induced depletion of the cardiac transcription factor GATA4 in cardiomyocytes. CARP expression is regulated in part by GATA4, prompting us to examine the relationship between GATA4 and CARP in cardiomyocytes. We show in co-transfection experiments that GATA4 operates upstream of CARP by activating the proximal CARP promoter. GATA4-siRNA knockdown in cardiomyocytes inhibited CARP expression and myofilament gene transcription, and induced extensive sarcomere disarray. Adenoviral overexpression of GATA4 (AdV-GATA4 in cardiomyocytes prior to doxorubicin exposure maintained GATA4 levels, modestly restored CARP levels, and attenuated sarcomere disarray. Interestingly, siRNA-mediated depletion of CARP completely abolished the Adv-GATA4 rescue of the doxorubicin-induced sarcomere phenotype. These data demonstrate co-dependent roles for GATA4 and CARP in regulating sarcomere gene expression and maintaining sarcomeric organization in cardiomyocytes in culture. The data further suggests that concurrent

  15. Effect of Withania somnifera (Ashwagandha) on the development of chemotherapy-induced fatigue and quality of life in breast cancer patients.

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    Biswal, Biswa Mohan; Sulaiman, Siti Amrah; Ismail, Hasanah Che; Zakaria, Hasmat; Musa, Kamarul Imran

    2013-07-01

    Hypothesis. Withania somnifera is an herb with antioxidant, anti-inflammatory, anticancer, antistress, and adaptogenic properties. Previous studies have shown its antistress effects in animals. Traditional Indian medicine has used it for centuries to alleviate fatigue and improve general well-being. This is an open-label prospective nonrandomized comparative trial on 100 patients with breast cancer in all stages undergoing either a combination of chemotherapy with oral Withania somnifera or chemotherapy alone. The chemotherapy regimens were either taxotere, adriamycin, and cyclophosphamide or 5-fluorouracil, epirubicin, and cyclophosphamide. Withania somnifera root extract was administered to patients in the study group at a dose of 2 g every 8 hours, throughout the course of chemotherapy. The quality-of-life and fatigue scores were evaluated before, during, and on the last cycles of chemotherapy using the EORTC QLQ-C30 (Version 3), Piper Fatigue Scale (PFS), and Schwartz Cancer Fatigue Scale (SCFS-6). The median age distributions in the study and control arm were 51 years (range = 36-70) and 50.5 years (range = 32-71), respectively. The majority (77%) of patients had stage II and III disease. Patients in the control arm experienced statistically significant higher estimated marginal means of fatigue score compared with the study group (P < .001 PFS, P < .003 SCFS-6). Furthermore, various symptom scales of the EORTC QLQ-C30 were statistically significant in 7 out of 18 symptoms in the intervention group compared with the control group (P < .001). The 24-month overall survival for all stages in study and control group patients were 72% versus 56%, respectively; however, the result was not significant (P = .176), at a median follow-up duration of 26 months. Withania somnifera has potential against cancer-related fatigue, in addition to improving the quality of life. However, further study with a larger sample size in a randomized trial is warranted to validate our

  16. Label-free image-based detection of drug resistance with optofluidic time-stretch microscopy (Conference Presentation)

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    Kobayashi, Hirofumi; Lei, Cheng; Mao, Ailin; Jiang, Yiyue; Guo, Baoshan; Ozeki, Yasuyuki; Goda, Keisuke

    2017-02-01

    Acquired drug resistance is a fundamental predicament in cancer therapy. Early detection of drug-resistant cancer cells during or after treatment is expected to benefit patients from unnecessary drug administration and thus play a significant role in the development of a therapeutic strategy. However, the development of an effective method of detecting drug-resistant cancer cells is still in its infancy due to their complex mechanism in drug resistance. To address this problem, we propose and experimentally demonstrate label-free image-based drug resistance detection with optofluidic time-stretch microscopy using leukemia cells (K562 and K562/ADM). By adding adriamycin (ADM) to both K562 and K562/ADM (ADM-resistant K562 cells) cells, both types of cells express unique morphological changes, which are subsequently captured by an optofluidic time-stretch microscope. These unique morphological changes are extracted as image features and are subjected to supervised machine learning for cell classification. We hereby have successfully differentiated K562 and K562/ADM solely with label-free images, which suggests that our technique is capable of detecting drug-resistant cancer cells. Our optofluidic time-stretch microscope consists of a time-stretch microscope with a high spatial resolution of 780 nm at a 1D frame rate of 75 MHz and a microfluidic device that focuses and orders cells. We compare various machine learning algorithms as well as various concentrations of ADM for cell classification. Owing to its unprecedented versatility of using label-free image and its independency from specific molecules, our technique holds great promise for detecting drug resistance of cancer cells for which its underlying mechanism is still unknown or chemical probes are still unavailable.

  17. CCL21/CCR7 enhances the proliferation, migration, and invasion of human bladder cancer T24 cells.

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    Miao Mo

    Full Text Available To investigate the effects of CCL21/CCR7 on the proliferation, migration, and invasion of T24 cells and the possible associated mechanisms: expression of MMP-2 and MMP-9, and regulation of BCL-2 and BAX proteins.T24 cells received corresponding treatments including vehicle control, antibody (20 ng/mL CCR7 antibody and 50 ng/ml CCL21, and 50, 100, and 200 ng/ml CCL21. Proliferation was evaluated by MTT assay; cell migration and invasion were assayed using a transwell chamber. Cell apoptosis was induced by Adriamycin (ADM. The rate of cell apoptosis was examined by flow cytometry using annexin V-FITC/PI staining. Western-blot was used to analyze MMP-2 and MMP-9 and BCL-2 and BAX proteins.CCL21 promoted T24 cell proliferation in concentration-dependent manner with that 200 ng/mL induced the largest amount of proliferation. Significant differences of cell migration were found between CCL21treatment groups and the control group in both the migration and invasion studies (P < 0.001 for all. The expressions of MMP-2 and MMP-9 proteins were significantly increased after CCL21 treatment (p < 0.05 for all. Protein expression of Bcl-21 follows an ascending trend while the expression of Bax follows a descending trend as the concentration of CCL21 increases. No difference was found between the control group and antibody group for all assessments.CCL21/CCR7 promoted T24 cell proliferation and enhanced its migration and invasion via the increased expression of MMP-2 and MMP-9. CCL21/CCR7 had antiapoptotic activities on T24 cells via regulation of Bcl-2 and Bax proteins. CCL21/CCR7 may promote bladder cancer development and metastasis.

  18. The fine-tuning of thermosensitive and degradable polymer micelles for enhancing intracellular uptake and drug release in tumors.

    Science.gov (United States)

    Li, Wei; Li, Jinfeng; Gao, Jie; Li, Bohua; Xia, Yu; Meng, Yanchun; Yu, Yongsheng; Chen, Huaiwen; Dai, Jianxin; Wang, Hao; Guo, Yajun

    2011-05-01

    Focusing on high temperature and low pH of tumor tissue, we prepared temperature and pH responsive poly(N-isopropylacrylamide-co-N,N-dimethylacrylamide-b-lacitde) (PID(118)-b-PLA(59)) and poly(N-isopropylacrylamide-co-N,N-dimethylacrylamide-b-ε-caprolactone) (PID(118)-b-PCL(60)) diblock copolymers with symmetric hydrophobic blocks by the reversible addition-fragmentation chain transfer (RAFT). The corresponding dual functional polymeric micelles were fabricated by dialysis methods. Their well-defined core-shell structure was characterized by (1)H NMR in D(2)O and further confirmed by TEM. Their structural and physical chemistry properties such as diameters (D), core corona dimension (R(core), R(shell)), distribution (PDI), M(w), aggregation number (N(agg)), second virial coefficient (A(2)), critical micellization concentration (CMC) and z-potential were firstly systemically investigated by dynamic and static laser light scattering. The volume phase transition temperature (VPTT) was around 40 °C above which the intracellular uptake of adriamycin (ADR) was significantly enhanced. Both flow cytometry and fluorescent microscopy showed that the ADR transported by these micelles was about 4 times higher than that by the commercial ADR formulation Taxotere®. In vitro cytotoxicity assay against N-87 cancer cell and confocal laser scanning microscopy (CLSM) also confirmed such promoting efficiency. In addition, it was interesting to find that cell surviving bounced back as T = 42 °C due to the inter-micellar aggregation. The well clarified mechanism strongly support that our finely tailored dual functional core-shell micelles are potent in enhancing cellular uptake and drug release. Copyright © 2011 Elsevier Ltd. All rights reserved.

  19. Glutathione Depletion Induced by c-Myc Downregulation Triggers Apoptosis on Treatment with Alkylating Agents1

    Science.gov (United States)

    Biroccio, Annamaria; Benassi, Barbara; Fiorentino, Francesco; Zupi, Gabriella

    2004-01-01

    Abstract Here we investigate the mechanism(s) involved in the c-Myc-dependent drug response of melanoma cells. By using three M14-derived c-Myc low-expressing clones, we demonstrate that alkylating agents, cisplatin and melphalan, trigger apoptosis in the c-Myc antisense transfectants, but not in the parental line. On the contrary, topoisomerase inhibitors, adriamycin and camptothecin, induce apoptosis to the same extent regardless of c-Myc expression. Because we previously demonstrated that c-Myc downregulation decreases glutathione (GSH) content, we evaluated the role of GSH in the apoptosis induced by the different drugs. In control cells treated with one of the alkylating agents or the others, GSH depletion achieved by l-buthionine-sulfoximine preincubation opens the apoptotic pathway. The apoptosis proceeded through early Bax relocalization, cytochrome c release, and concomitant caspase-9 activation, whereas reactive oxygen species production and alteration of mitochondria membrane potential were late events. That GSH was determining in the c-Myc-dependent drug-induced apoptosis was demonstrated by altering the intracellular GSH content of the c-Myc low-expressing cells up to the level of controls. Indeed, GSH ethyl ester-mediated increase of GSH abrogated apoptosis induced by cisplatin and melphalan by inhibition of Bax/cytochrome c redistribution. The relationship among c-Myc, GSH content, and the response to alkylating agent has been also evaluated in the M14 Myc overexpressing clones as well as in the melanoma JR8 c-Myc antisense transfectants. All together, these results demonstrate that GSH plays a key role in governing c-Myc-dependent drug-induced apoptosis. PMID:15153331

  20. Successful treatment of skin infiltration in childhood hematological malignancies with total skin electron beam therapy. A report of two cases

    Energy Technology Data Exchange (ETDEWEB)

    Ohkawa, Masahito; Shikano, Takaaki; Ueno, Norihiro; Tsujii, Hirohiko; Tono-oka, Tatsuhito; Matsumoto, Takahide.

    1988-07-01

    Two children with cutaneous lymphoma and leukemia who were treated with total skin electron beam therapy (TSEB) are described here. Patient 1. A 7-year-old boy was admitted because of a mass over the bilateral parotis and anemia. The white blood cell count on admission was 5,000/ul. Bone marrow examination revealed 70 per cent monoblasts (M5a type by FAB classification). Complete remission was obtained following the regimen of daunomycin, cytosine arabinoside, 6-mercaptopurine and prednisolone. He was again admitted because of a skin nodule on the left thigh 19 months after initial diagnosis. A biopsy of the skin nodule demonstrated monoblastic infiltration. He received 20 Grays (Gy) to the left thigh and this led to resolution of the skin nodule. At that time, other skin nodules appeared on the right upper and lower extremities. He was treated with TSEB. Daily doses of 1 Gy were given twice a week with a 4 MeV electron beam and a total dose of 10 Gy was administered over a period of 4 weeks. Although he again had a isolated skin relapse on the right shoulder, he remained in remission for 6 years after completing TSEB. Patient 2. A 6-year-old boy was admitted because of multiple skin lesions. Physical examination revealed 22 discrete, indurated skin nodules. a biopsy of a skin nodule demonstrated lymphoblast infiltration, confirming the diagnosis of B cell cutaneous lymphoma (stage IV). He was treated with CHOP (consisting of cyclophosphamide, adriamycin, vincristine and prednisolone). After two courses of CHOP therapy, he was treated with TSEB using the same technique described above. To date, the patient remains in remission 5 years after initial diagnosis.

  1. Minocycline, a putative neuroprotectant, co-administered with doxorubicin-cyclophosphamide chemotherapy in a xenograft model of triple-negative breast cancer

    Science.gov (United States)

    Himmel, Lauren E.; Lustberg, Maryam B.; DeVries, A. Courtney; Poi, Ming; Chen, Ching-Shih; Kulp, Samuel K.

    2016-01-01

    Minocycline is purported to have neuroprotective properties in experimental models of some human neurologic diseases, and has therefore been identified as a putative neuroprotectant for chemotherapy-induced cognitive impairment (CICI) in breast cancer patients. However, because its mechanism of action is believed to be mediated through anti-inflammatory, anti-apoptotic, and anti-oxidant pathways, co-administration of minocycline with chemotherapeutic agents has the potential to reduce the efficacy of anticancer drugs. The objective of this study is to evaluate the effect of minocycline on the activity of the AC chemotherapeutic regimen (Adriamycin [doxorubicin], Cytoxan [cyclophosphamide]) in in vitro and in vivo models of triple-negative breast cancer (TNBC). Clonogenic and methylthiazol tetrazolium (MTT) assays were used to assess survival and viability in two TNBC cell lines treated with increasing concentrations of AC in the presence or absence of minocycline. Biomarkers of apoptosis, cell stress, and DNA damage were evaluated by western blot. The in vivo effects of AC and minocycline, each alone and in combination, were assessed in a xenograft model of TNBC in female athymic nude mice by weekly tumor volume measurement, body and organ weight measurement, and histopathology. Apoptosis and proliferation were characterized by immunohistochemistry in the xenografts tumors. Brains from tumor-bearing mice were evaluated for microglial activation, glial scars, and the proportion of neural progenitor cells. Data from these in vitro and in vivo studies demonstrate that minocycline does not diminish the cytotoxic and tumor-suppressive effects of this chemotherapeutic drug combination in TNBC cells. Moreover, minocycline appeared to prevent the reduction in doublecortin-positive neural progenitor cells observed in AC-treated mice. We posit that minocycline may be useful clinically for its reported neuroprotective activity in breast cancer patients receiving AC without

  2. Rapid tumor necrosis and massive hemorrhage induced by bevacizumab and paclitaxel combination therapy in a case of advanced breast cancer

    Directory of Open Access Journals (Sweden)

    Ono M

    2013-10-01

    Full Text Available Mayu Ono, Tokiko Ito, Toshiharu Kanai, Koichi Murayama, Hiroshi Koyama, Kazuma Maeno, Yasuhiro Mochizuki, Asumi Iesato, Toru Hanamura, Toshihiro Okada, Takayuki Watanabe, Ken-ichi ItoDivision of Breast and Endocrine Surgery, Department of Surgery (II, Shinshu University School of Medicine, Matsumoto, JapanAbstract: Bevacizumab when combined with chemotherapy exerts significant activity against many solid tumors through tumor angiogenesis inhibition; however, it can induce severe side effects. We report the rare case of a 27-year-old premenopausal woman with locally advanced breast cancer that was marked by rapid tumor necrosis followed by massive hemorrhage shortly after bevacizumab and paclitaxel administration. On the basis of histopathological examination of a biopsy specimen and computed tomography findings, she was diagnosed with stage IV estrogen and progesterone receptor-negative and human epidermal growth factor receptor type 2-positive breast cancer with multiple organ metastases when she had entered gestational week 24. Cyclophosphamide, Adriamycin®, fluorouracil therapy was initiated, but multiple liver metastases continued to progress. A healthy fetus was delivered by induced delivery and trastuzumab-based treatment was initiated. Although the multiple liver metastases were controlled successfully by trastuzumab combined with paclitaxel, the primary tumor continued to expand even after subsequent administration of three other treatment regimens including anti-human epidermal growth factor receptor type 2 agents and cytotoxic drugs. To inhibit primary tumor growth, a combination therapy with paclitaxel and bevacizumab was subsequently initiated. Following therapy initiation, however, the large tumor occupying the patient's entire left breast became necrotic and ulcerated rapidly. Furthermore, massive hemorrhage from the tumor occurred 5 weeks after bevacizumab-based therapy initiation. Although hemostasis was achieved by manual

  3. Renoprotective effect of the antioxidant curcumin: Recent findings

    Directory of Open Access Journals (Sweden)

    Joyce Trujillo

    2013-01-01

    Full Text Available For years, there have been studies based on the use of natural compounds plant-derived as potential therapeutic agents for various diseases in humans. Curcumin is a phenolic compound extracted from Curcuma longa rhizome commonly used in Asia as a spice, pigment and additive. In traditional medicine of India and China, curcumin is considered as a therapeutic agent used in several foods. Numerous studies have shown that curcumin has broad biological functions particularly antioxidant and antiinflammatory. In fact, it has been established that curcumin is a bifunctional antioxidant; it exerts antioxidant activity in a direct and an indirect way by scavenging reactive oxygen species and inducing an antioxidant response, respectively. The renoprotective effect of curcumin has been evaluated in several experimental models including diabetic nephropathy, chronic renal failure, ischemia and reperfusion and nephrotoxicity induced by compounds such as gentamicin, adriamycin, chloroquine, iron nitrilotriacetate, sodium fluoride, hexavalent chromium and cisplatin. It has been shown recently in a model of chronic renal failure that curcumin exerts a therapeutic effect; in fact it reverts not only systemic alterations but also glomerular hemodynamic changes. Another recent finding shows that the renoprotective effect of curcumin is associated to preservation of function and redox balance of mitochondria. Taking together, these studies attribute the protective effect of curcumin in the kidney to the induction of the master regulator of antioxidant response nuclear factor erythroid-derived 2 (Nrf2, inhibition of mitochondrial dysfunction, attenuation of inflammatory response, preservation of antioxidant enzymes and prevention of oxidative stress. The information presented in this paper identifies curcumin as a promising renoprotective molecule against renal injury.

  4. The role of stem cell mobilization regimen on lymphocyte collection yield in patients with multiple myeloma.

    Science.gov (United States)

    Hiwase, D K; Hiwase, S; Bailey, M; Bollard, G; Schwarer, A P

    2008-01-01

    The lymphocyte dose (LY-DO) infused during an autograft influences absolute lymphocyte (ALC) recovery and survival following autologous stem cell transplantation (ASCT) in multiple myeloma (MM) patients. Factors influencing lymphocyte yield (LY-C) during leukapheresis have been poorly studied. Factors that could influence survival, LY-C and CD34(+) cell yield were analyzed in 122 MM patients. Three mobilization regimens were used, granulocyte-colony-stimulating factor (G-CSF) alone (n=13), cyclophosphamide 1-2 g/m(2) plus G-CSF (LD-CY, n=62) and cyclophosphamide 3-4 g/m(2) and G-CSF (ID-CY, n=47). Using multivariate analysis, age, LY-C, ALC on day 30 (ALC-30) and International Staging System stage significantly influenced overall (OS) and progression-free survival (PFS) following ASCT. PFS (56 versus 29 months, P=0.05) and OS (72 versus 49 months; P=0.07) were longer in the LY-C>or=0.12x10(9)/kg group than the LY-Cradiotherapy and number of leukaphereses significantly influenced LY-C. Significantly higher LY-C was obtained with G-CSF alone compared with the LD-CY and ID-CY groups. CD34(+) count on the day of leukapheresis, prior chemotherapy with prednisone, cyclophosphamide, adriamycin and BCNU or melphalan, and stem cell mobilization regimen significantly influenced CD34(+) cell yield. LY-C influenced ALC-15 and survival following ASCT. Factors that influenced CD34(+) cell yield and LY-C during leukapheresis were different. Mobilization should be tailored to maximize the LY-C and CD34(+) cell yield.

  5. [The Raman Spectroscopy (RS): A new tool for the analytical quality control of injectable in health settings. Comparison of RS technique versus HPLC and UV/Vis-FTIR, applied to anthracyclines as anticancer drugs].

    Science.gov (United States)

    Bourget, P; Amin, A; Moriceau, A; Cassard, B; Vidal, F; Clement, R

    2012-12-01

    The study compares the performances of three analytical methods devoted to Analytical Quality Control (AQC) of therapeutic solutions formed into care environment, we are talking about Therapeutics Objects(TN) (TOs(TN)). We explored the pharmacological model of two widely used anthracyclines i.e. adriamycin and epirubicin. We compared the performance of the HPLC versus two vibrational spectroscopic techniques: a tandem UV/Vis-FTIR on one hand and Raman Spectroscopy (RS) on the other. The three methods give good results for the key criteria of repeatability, of reproducibility and, of accuracy. A Spearman and a Kendall correlation test confirms the noninferiority of the vibrational techniques as an alternative to the reference method (HPLC). The selection of bands for characterization and quantification by RS is the results of a gradual process adjustment, at the intercept of matrix effects. From the perspective of a AQC associated to release of TOs, RS displays various advantages: (a) to decide quickly (~2min), simultaneously and without intrusion or withdrawal on both the nature of a packaging than on a solvant and this, regardless of the compound of interest; it is the founder asset of the method, (b) to explore qualitatively and quantitatively any kinds of TOs, (c) operator safety is guaranteed during production and in the laboratory, (d) the suppression of analytical releases or waste contribute to protects the environment, (e) the suppression.of consumables, (f) a negligible costs of maintenance, (g) a small budget of technicians training. These results already show that the SR technology is potentially a strong contributor to the safety of the medication cycle and fight against the iatrogenic effects of drugs. Copyright © 2011 Elsevier Masson SAS. All rights reserved.

  6. Concurrent radiochemotherapy of locally recurrent or advanced sarcomas of the uterus

    Energy Technology Data Exchange (ETDEWEB)

    Kortmann, B.; Klautke, G.; Fietkau, R. [Dept. of Radiotherapy, Univ. of Rostock (Germany); Reimer, T.; Gerber, B. [Dept. of Gynecology and Obstetrics, Univ. of Rostock, Suedstadt Hospital (Germany)

    2006-06-15

    Background: uterine sarcomas are rare tumors. Until now, no data on the treatment of recurrent or advanced uterine sarcomas using concurrent radiochemotherapy (RCT) has been available. Patients and methods: from 01/1997 to 03/2004, seven patients with locally recurrent (n = 6) or locally advanced uterine sarcomas (n = 1) received concurrent RCT after tumor surgery (R1/2 resection in 3/7 patients). A total radiation dose of 45 Gy was applied in single doses of 1.8 Gy using an external-beam technique; in addition, three to four intracavitary doses of 5 Gy were applied. Concurrent chemotherapy was generally administered as follows: 1.2 g/m{sup 2} ifosfamide on days 1-5 and 29-33 in combination with 50 or 40 mg/m{sup 2} adriamycin on days 2 and 30. 3/7 patients received further cycles of chemotherapy. The median follow-up was 35 months. Results: all recurrences (before RCT) were localized either in the vagina or in or directly proximal to the vaginal stump. The main side effects of RCT were hemotoxicity (grade 3: n = 3/7; grade 4: n = 4/7; neutropenic fever n = 1/7) and diarrhea (grade 3: n = 5/7). At the median follow-up (35 months), 4/7 patients had recurrences (one local recurrence; one lymph node recurrence outside the irradiated field, two distant metastases). Local control in the irradiated field was 80% {+-} 18% after 3 years. Disease-free survival calculated according to Kaplan-Meier was 57% {+-} 19% after 3 years. Presently, 5/7 patients are still alive, corresponding to a 3-year survival rate of 83% {+-} 15%. Conclusion: concurrent RCT shows good local effectiveness with a good long-term survival. Further evaluation in phase II studies is recommended. (orig.)

  7. Expression of the apoptosis-related genes BCL-2 and BAD in human breast carcinoma and their associated relationship with chemosensitivity

    Directory of Open Access Journals (Sweden)

    Fan Yuan-ming

    2010-08-01

    Full Text Available Abstract Objective To evaluate the expression of BCL-2 and BAD genes in tissues of breast carcinoma and investigate the relationship between the expression of BCL-2 and BAD in breast cancer cells with chemosensitivity. Methods Immunohistochemical technique was used to detect the expression of BCL-2, BAD in 10 normal breast tissues, 10 breast fibroadenoma tissues, 40 youth human breast carcinoma tissues, 40 menopause human breast carcinoma tissues. And to detect the expression of ER, PR in 80 human breast carcinoma tissues. 20 Surgical samples of breast cancer, diagnosed by pathology, were obtained from The First Affiliated Hospital of Chongqing Medical University. The cancer sample cells were cultured separately in the incubator at 37°C, 5% CO2 in vitro. The rate of inhibition of cancer cells in 4 kinds of anticancer drugs-- Epirubicin Adriamycin (EADM,5-Fluorouracil (5-Fu, Navelbine(NVB and Diaminedichloroplatinum (DDP, were assayed by MTT method. Results The expression of BCL-2, BAD genes in young human breast carcinoma tissues were lower than that in menopause human breast carcinoma tissues (P . There was a negative correlation between the positive expression rate of BCL-2 and histologic grade or the lymph node metastasis (P . There was a positive correlation between the expression rates of BCL-2 and of ER, PR (P . The expression of BAD had no relationship with the expression of ER, PR, histologic grade and the lymph node metastasis(P = NS. Sensitivity rates of 20 breast cancer cells in 0.1 × PPC within 48 h in vitro were 30% EADM,20% 5-Fu,45% NVB and 25% DDP. Respectively, the rate of inhibition of EADM,5- Fu, NVB and DDP were significantly higher in the BCL-2 negative cancer cells than in the BCL-2 positive cancer cells. A negative correlation was found between expression of BCL-2 and chemosensitivity for all the 4 anticancer drugs. The inhibition rates of EADM and NVB were significantly lower in the BAD negative cancer cells than in the

  8. PEG-PE/clay composite carriers for doxorubicin: Effect of composite structure on release, cell interaction and cytotoxicity.

    Science.gov (United States)

    Kohay, Hagay; Sarisozen, Can; Sawant, Rupa; Jhaveri, Aditi; Torchilin, Vladimir P; Mishael, Yael G

    2017-06-01

    A novel drug delivery system for doxorubicin (DOX), based on organic-inorganic composites was developed. DOX was incorporated in micelles (M-DOX) of polyethylene glycol-phosphatidylethanolamine (PEG-PE) which in turn were adsorbed by the clay, montmorillonite (MMT). The nano-structures of the PEG-PE/MMT composites of LOW and HIGH polymer loadings were characterized by XRD, TGA, FTIR, size (DLS) and zeta measurements. These measurements suggest that for the LOW composite a single layer of polymer intercalates in the clay platelets and the polymer only partially covers the external surface, while for the HIGH composite two layers of polymer intercalate and a bilayer may form on the external surface. These nanostructures have a direct effect on formulation stability and on the rate of DOX release. The release rate was reversely correlated with the degree of DOX interaction with the clay and followed the sequence: M-DOX>HIGH formulation>LOW formulation>DOX/MMT. Despite the slower release from the HIGH formulation, its cytotoxicity effect on sensitive cells was as high as the "free" DOX. Surprisingly, the LOW formulation, with the slowest release, demonstrated the highest cytotoxicity in the case of Adriamycin (ADR) resistant cells. Confocal microscopy images and association tests provided an insight into the contribution of formulation-cell interactions vs. the contribution of DOX release rate. Internalization of the formulations was suggested as a mechanism that increases DOX efficiency, particularly in the ADR resistant cell line. The employment of organic-inorganic hybrid materials as drug delivery systems, has not reached its full potential, however, its functionality as an efficient tunable release system was demonstrated. DOX PEG-PE/clay formulations were design as an efficient drug delivery system. The main aim was to develop PEG-PE/clay formulations of different structures based on various PEG-PE/clay ratios in order to achieve tunable release rates, to control

  9. In vitro and in vivo studies of pirarubicin-loaded SWNT for the treatment of bladder cancer

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Gang; He, Yunfeng; Wu, Xiaohou; Zhang, Yao [Department of Urology, The First Affiliated Hospital, Chongqing Medical University, Chongqing (China); Luo, Chunli [Department of Laboratory Medicine, Chongqing Medical University, Chongqing (China); Jing, Peng [Department of Urology, The First Affiliated Hospital, Chongqing Medical University, Chongqing (China)

    2012-07-13

    Intravesical chemotherapy is an important part of the treatment for superficial bladder cancer. However, the response to it is limited and its side effects are extensive. Functional single-walled carbon nanotubes (SWNT) have shown promise for tumor-targeted accumulation and low toxicity. In the present study, we performed in vivo and in vitro investigations to determine whether SWNT-based drug delivery could induce high tumor depression in rat bladder cancer and could decrease the side effects of pirarubicin (tetrahydropyranyl-adriamycin, THP). We modified SWNT with phospholipid-branched polyethylene glycol and constructed an SWNT-THP conjugate via a cleavable ester bond. The cytotoxicity of SWNT-THP against the human bladder cancer cell line BIU-87 was evaluated in vitro. Rat bladder cancer in situ models constructed by N-methyl-N-nitrosourea intravesical installation (1 g/L, 2 mg/rat once every 2 weeks for 8 weeks) were used for in vivo evaluation of the cytotoxicity of SWNT and SWNT-THP. Specific side effects in the THP group including urinary frequency (N = 12), macroscopic hematuria (N = 1), and vomiting (N = 7) were identified; however, no side effects were observed with SWNT-THP treatment. Flow cytometry was used to assess the cytotoxicity in vitro and in vivo. Results showed that SWNT alone did not yield significant tumor depression compared to saline (1.74 ± 0.56 and 1.23 ± 0.42%) in vitro. SWNT-THP exhibited higher tumor depression than THP-saline in vitro (74.35 ± 2.56 and 51.24 ± 1.45%) and in vivo (52.46 ± 2.41 and 96.85 ± 0.85%). The present findings indicate that SWNT delivery of THP for the treatment of bladder cancer leads to minimal side effects without loss of therapeutic efficacy. Therefore, this nanotechnology may play a crucial role in the improvement of intravesical treatment of bladder cancer. Key words: Single-walled carbon nanotubes; Bladder cancer; Drug vehicle; THP; Intravesical chemotherapy.

  10. Management of Non-Hodgkin Lymphoma: ICMR Consensus Document.

    Science.gov (United States)

    Thacker, Nirav; Bakhshi, Sameer; Chinnaswamy, Girish; Vora, Tushar; Prasad, Maya; Bansal, Deepak; Agarwala, Sandeep; Kapoor, Gauri; Radhakrishnan, Venkatraman; Laskar, Siddharth; Kaur, Tanvir; Rath, G K; Dhaliwal, Rupinder Singh; Arora, Brijesh

    2017-05-01

    infrastructure and/or no methotrexate levels; modified MCP-841 with cytarabine, modified BFM-90 protocol with reduced-dose methotrexate or I-BFM 2009 protocol using Capizzi methotrexate may be considered. For ALCL (Anaplastic large cell lymphoma), in centres with good infrastructure and methotrexate levels, ALCL-99 protocol may be considered. In centres with limited infrastructure and/or no methotrexate levels; CHOP (limited-stage only), modified MCP-842 protocol or APO (Adriamycin-prednisolone-oncovin) regimen may be used.

  11. Cytotoxic effect of essential oil of thyme (Thymus broussonettii on the IGR-OV1 tumor cells resistant to chemotherapy

    Directory of Open Access Journals (Sweden)

    L. Ait M'Barek

    2007-11-01

    Full Text Available The anti-tumor effect of the Moroccan endemic thyme (Thymus broussonettii essential oil (EOT was investigated in vitro using the human ovarian adenocarcinoma IGR-OV1 parental cell line OV1/P and its chemoresistant counterparts OV1/adriamycin (OV1/ADR, OV1/vincristine (OV1/VCR, and OV1/cisplatin (OV1/CDDP. All of these cell lines elicited various degrees of sensitivity to the cytotoxic effect of EOT. The IC50 values (mean ± SEM, v/v were 0.40 ± 0.02, 0.39 ± 0.02, 0.94 ± 0.05, and 0.65 ± 0.03% for OV1/P, OV1/ADR, OV1/VCR, and OV1/CDDP, respectively. Using the DBA-2/P815 (H2d mouse model, tumors were developed by subcutaneous grafting of tumor fragments of similar size obtained from P815 (murin mastocytoma cell line injected in donor mouse. Interestingly, intra-tumoral injection of EOT significantly reduced solid tumor development. Indeed, by the 30th day of repeated EOT treatment, the tumor volumes of the animals were 2.00 ± 0.27, 1.35 ± 0.20, and 0.85 ± 0.18 cm³ after injection with 10, 30, or 50 µL per 72 h (six times, respectively, as opposed to 3.88 ± 0.50 cm³ for the control animals. This tumoricidal effect was associated with a marked decrease of mouse mortality. In fact, in these groups of mice, the recorded mortality by the 30th day of treatment was 30 ± 4, 18 ± 4, and 8 ± 3%, respectively, while the control animals showed 75 ± 10% of mortality. These data indicate that the EOT which contains carvacrol as the major component has an important in vitro cytotoxic activity against tumor cells resistant to chemotherapy as well as a significant antitumor effect in mice. However, our data do not distinguish between carvacrol and the other components of EOT as the active factor.

  12. Doxorubicin plus tumor necrosis factor alpha combination treatments in EL4-lymphoma-bearing C57BL/6 mice.

    Science.gov (United States)

    Ehrke, M J; Verstovsek, S; Ujházy, P; Meer, J M; Eppolito, C; Maccubbin, D L; Mihich, E

    1998-02-01

    The therapeutic efficacy of a total of 42 single-agent or combination protocols involving doxorubicin (Adriamycin, ADM) and tumor necrosis factor alpha (TNFalpha) were evaluated in the syngeneic murine lymphoma model, C57BL/6-EL4. Combination treatments were the most effective and the therapeutic effects were schedule-dependent; e.g. it was generally advantageous for ADM to precede TNFalpha administration. Two protocols selected for further study were 4 mg/kg ADM i.v. on days 1 and 8 plus TNFalpha, i.v., at either 16000 U (7 microg)/injection, on days 1 and 8 or 4000 U (1.7 microg)/injection, on days 11-15. Survival of mice bearing one of four EL4 sublines having different in vitro drug sensitivities was assessed. These sublines were E10 (ADM-sensitive/TNFalpha-resistant), E16 (sensitive/sensitive), ER2 (ADM-resistant/TNFalpha-sensitive) and ER13 (resistant/resistant). Between 80% and 100% long-term survivors (i.e. tumor free on day 60) were obtained with the two treatments in mice bearing ADM-sensitive sublines, even though one of these sublines, E10, was resistant to TNFalpha in vitro. Induction of long-term survival appeared, therefore, to correlate with in vitro defined sensitivity/resistance to ADM, but not to TNFalpha Treatment-induced modulations of tumoricidal immune effector functions were also examined. Taken together, the results indicated that induction of long-term survival involved complex interactions of: (1) ADM-induced tumor modifications, including, but not limited to, tumor debulking, (2) combination-treatment-induced modifications of splenic cytolytic T cell and macrophage activities, and (3) the restoration of thymus cellularity. Finally, when long-term survivors resulting from treatment of E10- or E16-bearing mice were implanted with ER2 on day 120, the majority survived, indicating that long-term immune memory, capable of recognizing drug resistant variants, had been established.

  13. Twice daily radiation therapy plus concurrent chemotherapy for limited-stage small cell lung cancer

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    Yeo, Seung Gu; Cho, Moon June; Kim, Sun Young; Kim, Ki Whan; Kim, Jun Sang [Chungnam National University Hospital, Daejeon (Korea, Republic of)

    2006-06-15

    A retrospective study was performed to evaluate the efficiency and feasibility of twice daily radiation therapy plus concurrent chemotherapy for limited-stage small cell lung cancer in terms of treatment response, survival, patterns of failure, and acute toxicities. Between February 1993 and October 2002, 76 patients of histologically proven limited-stage small cell lung cancer (LS-SCLC) were treated with twice daily radiation therapy and concurrent chemotherapy. Male was in 84% (64/76), and median age was 57 years (range, 32 {approx} 75 years). Thoracic radiation therapy consisted of 120 or 150 cGy per fraction, twice a day at least 6 hours apart, 5 days a week. Median total dose was 50.4 Gy (range, 45 {approx} 51 Gy). Concurrent chemotherapy consisted of CAV (cytoxan 1000 mg/m{sup 2}, adriamycin 40 mg/m{sup 2}, vincristine 1 mg/m{sup 2}) alternating with PE (cisplatin 60 mg/m{sup 2}, etoposide 100 mg/m{sup 2}) or PE alone, every 3 weeks. The median cycle of chemotherapy was six (range, 1 {approx} 9 cycle). Prophylactic cranial irradiation (PCI) was recommended to the patients who achieved a complete response (CR). PCI scheme was 25 Gy/ 10 fractions. Median follow up was 18 months (range, 1 {approx} 136 months). Overall response rate was 86%; complete response in 39 (52%) and partial response in 26 (34%) patients. The median overall survival was 23 months. One, two, and three year overall survival rate was 72%, 50% and 30%, respectively. In univariate analysis, the treatment response was revealed as a significant favorable prognostic factor for survival ({rho} < 0.001). Grade 3 or worse acute toxicities were leukopenia in 46 (61%), anemia in 5 (6%), thrombocytopenia in 10 (13%), esophagitis in 5 (6%), and pulmonary toxicity in 2 (2%) patients. Of 73 evaluable patients, 40 (55%) patients subsequently had disease progression. The most frequent first site of distant metastasis was brain. Twice daily radiation therapy plus concurrent chemotherapy produced favorable

  14. Development of an in vitro multicellular tumor spheroid model using microencapsulation and its application in anticancer drug screening and testing.

    Science.gov (United States)

    Zhang, Xulang; Wang, Wei; Yu, Weiting; Xie, Yubing; Zhang, Xiaohui; Zhang, Ying; Ma, Xiaojun

    2005-01-01

    In this study, an in vitro multicellular tumor spheroid model was developed using microencapsulation, and the feasibility of using the microencapsulated multicellular tumor spheroid (MMTS) to test the effect of chemotherapeutic drugs was investigated. Human MCF-7 breast cancer cells were encapsulated in alginate-poly-l-lysine-alginate (APA) microcapsules, and a single multicellular spheroid 150 mum in diameter was formed in the microcapsule after 5 days of cultivation. The cell morphology, proliferation, and viability of the MMTS were characterized using phase contrast microscopy, BrdU-labeling, MTT stain, calcein AM/ED-2 stain, and H&E stain. It demonstrated that the MMTS was viable and that the proliferating cells were mainly localized to the periphery of the cell spheroid and the apoptotic cells were in the core. The MCF-7 MMTS was treated with mitomycin C (MC) at a concentration of 0.1, 1, or 10 times that of peak plasma concentration (ppc) for up to 72 h. The cytotoxicity was demonstrated clearly by the reduction in cell spheroid size and the decrease in cell viability. The MMTS was further used to screen the anticancer effect of chemotherapeutic drugs, treated with MC, adriamycin (ADM) and 5-fluorouracil (5-FU) at concentrations of 0.1, 1, and 10 ppc for 24, 48, and 72 h. MCF-7 monolayer culture was used as control. Similar to monolayer culture, the cell viability of MMTS was reduced after treatment with anticancer drugs. However, the inhibition rate of cell viability in MMTS was much lower than that in monolayer culture. The MMTS was more resistant to anticancer drugs than monolayer culture. The inhibition rates of cell viability were 68.1%, 45.1%, and 46.8% in MMTS and 95.1%, 86.8%, and 91.6% in monolayer culture treated with MC, ADM, and 5-FU at 10 ppc for 72 h, respectively. MC showed the strongest cytotoxicity in both MMTS and monolayer, followed by 5-FU and ADM. It demonstrated that the MMTS has the potential to be a rapid and valid in vitro model to

  15. A canine model of dilated cardiomyopathy induced by repetitive intracoronary doxorubicin administration.

    Science.gov (United States)

    Toyoda, Y; Okada, M; Kashem, M A

    1998-06-01

    A simple and reproducible large animal model of dilated cardiomyopathy has yet to be developed. This study was performed to establish a canine model of dilated cardiomyopathy. Six closed-chest pure-bred beagles weighing 8 to 12 kg (10 +/- 1.9 kg) underwent intracoronary infusion of doxorubicin (Adriamycin). Low-dose (0.7 mg/kg) doxorubicin was infused into the left main coronary artery through a 5F Judkins catheter. Infusions were repeated weekly for 5 weeks. We evaluated the effects on cardiac hemodynamics, chamber size, the neuroendocrine system, and cardiac ultrastructure before and 1 and 3 months after five intracoronary infusions of doxorubicin. Three months after treatment, fractional shortening (mean +/- standard error of the mean) had decreased from 36.5% +/- 0.8% to 21.7% +/- 1.4% (p = 0.0003), and left ventricular ejection fraction had decreased from 71.0% +/- 3.3% to 36.3% +/- 5.5% (p = 0.001). The left ventricular diastolic dimension had increased from 27.8 +/- 0.9 to 35.5 +/- 0.6 mm (p = 0.003), and the left ventricular end-diastolic volume had increased from 27.5 +/- 1.8 to 38.3 +/- 1.9 ml (p = 0.015). Left ventricular end-diastolic pressure had increased from 8.5 +/- 0.9 to 14.5 +/- 1.1 mm Hg (p = 0.01), and the stroke volume had decreased from 16.7 +/- 0.9 to 11.5 +/- 0.4 ml (p = 0.001). During the same period, the plasma norepinephrine concentration also increased from 114 +/- 27.4 to 423 +/- 88.9 pg/ml (p = 0.024), and plasma atrial natriuretic peptide levels increased from 33.8 +/- 7.0 to 76.5 +/- 14.8 pg/ml (p = 0.012). Histologic changes such as myofiber atrophy and cytoplasmic vacuolation, accompanied with interstitial fibrosis, were found predominantly in the left ventricle. Repeated intracoronary infusions of doxorubicin represent a simple and reliable technique to produce dilated cardiomyopathy in the dog. This model can be used to evaluate the effects of new therapies, especially surgical treatments such as dynamic cardiomyoplasty and

  16. Pentoxifylline sensitizes human cervical tumor cells to cisplatin-induced apoptosis by suppressing NF-kappa B and decreased cell senescence

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    Hernandez-Flores Georgina

    2011-11-01

    Full Text Available Abstract Background Worldwide, cervical cancer is the second most common causes of cancer in women and represents an important mortality rate. Cisplatin (CIS is a very important antitumoral agent and can lead tumor cells toward two important cellular states: apoptosis and senescence. In some types of cancers pentoxifylline (PTX sensitizes these cells to the toxic action of chemotherapeutics drugs such as adriamycin, inducing apoptosis. In the present work, we studied in vitro whether PTX alone or in combination with CIS induces apoptosis and/or senescence in cervix cancer HeLa and SiHa cell lines infected with HPV types 16 and 18, respectively, as well as in immortalized keratinocytyes HaCaT cells. Methods HeLa (HPV 18+, SiHa (HPV 16+ cervix cancer cells and non-tumorigenic immortalized HaCaT cells (control were treated with PTX, CIS or both. The cellular toxicity and survival fraction of PTX and CIS were determinate by WST-1 and clonogenic assays respectively. Apoptosis, caspase activation and phosphorylation of ERK1/2, p38, p65 (NF-κB, Bcl-2 and Bcl-XL anti-apoptotic proteins were determinated by flow cytometry. Senescence by microscopy. Phosphorylation of IκBα and IκB total were measured by ELISA. Pro-apoptotic, anti-apoptotic and senescence genes, as well as HPV-E6/7 mRNA expression, were detected by RT-PCR. Results Our results show that after 24 hours of incubation PTX per se is toxic for cancer cells affecting cell viability and inducing apoptosis. The toxicity in HaCaT cells was minimal. CIS induces apoptosis in HeLa and SiHa cells and its effect was significantly increases when the cells were treated with PTX + CIS. In all studies there was a direct correlation with levels of caspases (-3, -6, -7, -9 and -8 activity and apoptosis. CIS induces important levels of senescence and phosphorylation of ERK1/2, p38, p65/RELA, and IκBα, and decreased the expression of anti-apoptotic protein Bcl-XL. Surprisingly these levels were

  17. Combined Treatment of Residual, Recurrent and Unresectable Gastric Cancer

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    Bae, Hoon Sik [Maryknoll Hospital, Pusan (Korea, Republic of)

    1990-06-15

    A series of 25 patients with residual, recurrent, and unresectable gastric cancer received various combination of surgery, radiotherapy (RT), chemotherapy (CT), and hyperthermia (HT). They were placed INTO 7 categories; 1) CT and HT-14 patients; 2) RT and HT-15 patients; 3) surgery, RT and HT-2 patients; 4) surgery, RT, HT and CT-1 patient; 5) RT, HT and CT-1 patient; 6) RT and CT-1 patient; 7) RT alone-1 patient. Three patients had curative resection. 21 patients received irradiation with tightly contoured portals to spare as much small bowel, kidney and marrow as possible. Hyperthermia was applied regionally once or twice a week for 23 patients using 8 MHz radiofrequency capacitive heating device (Thermotron RF-8). HT was given approximately 30 min after RT. 7 patients were treated with CT: 4 patients received HT and concomitant Mitomycin-C; 3 patients received HT and sequential 5-FU+Adriamycin+Mitomycin-C. There was not any treatment related deaths. There was also no evidence of treatment related problems with liver, kidney, stomach, or spinal cord except only one case of transient diabetic ketoacidosis. The tumor response was evaluable in 22 patients. None achieved complete remission. 11(50%) achieved partial remission. The response rate was correlated with total radiation dose and achieved maximum temperature. 9 of 14 (64%) received more than 4000 cGy showed partial remission; especially, all 3 patients received more than 5500 cGy achieved partial response. 8 of the 12 patients (67%) who achieved maximal temperature more than 41 .deg. C showed partial response in comparing with 25% (2 of 8 patients, below 41 .deg. C). The numbers of HT, however, was not correlated with the response. 3 of the 25 patients (12%) remain alive. The one who was surgically unresectable and underwent irradiation alone is in progression of the disease with distant metastases. The remaining two patients with curative resection are alive with free of disease, 24 and 35 months

  18. Functional study of the novel multidrug resistance gene HA117 and its comparison to multidrug resistance gene 1

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    Chen Tingfu

    2010-07-01

    Full Text Available Abstract Background The novel gene HA117 is a multidrug resistance (MDR gene expressed by all-trans retinoic acid-resistant HL-60 cells. In the present study, we compared the multidrug resistance of the HA117 with that of the classical multidrug resistance gene 1 (MDR1 in breast cancer cell line 4T1. Methods Transduction of the breast cancer cell line 4T1 with adenoviral vectors encoding the HA117 gene and the green fluorescence protein gene (GFP (Ad-GFP-HA117, the MDR1 and GFP (Ad-GFP-MDR1 or GFP (Ad-GFP was respectively carried out. The transduction efficiency and the multiplicity of infection (MOI were detected by fluorescence microscope and flow cytometry. The transcription of HA117 gene and MDR1 gene were detected by reverse transcription polymerase chain reaction (RT-PCR. Western blotting analysis was used to detect the expression of P-glycoprotein (P-gp but the expression of HA117 could not be analyzed as it is a novel gene and its antibody has not yet been synthesized. The drug-excretion activity of HA117 and MDR1 were determined by daunorubicin (DNR efflux assay. The drug sensitivities of 4T1/HA117 and 4T1/MDR1 to chemotherapeutic agents were detected by Methyl-Thiazolyl-Tetrazolium (MTT assay. Results The transducted efficiency of Ad-GFP-HA117 and Ad-GFP-MDR1 were 75%-80% when MOI was equal to 50. The transduction of Ad-GFP-HA117 and Ad-GFP-MDR1 could increase the expression of HA117 and MDR1. The drug resistance index to Adriamycin (ADM, vincristine (VCR, paclitaxel (Taxol and bleomycin (BLM increased to19.8050, 9.0663, 9.7245, 3.5650 respectively for 4T1/HA117 and 24.2236, 11.0480, 11.3741, 0.9630 respectively for 4T1/MDR1 as compared to the control cells. There were no significant differences in drug sensitivity between 4T1/HA117 and 4T1/MDR1 for the P-gp substrates (ADM, VCR and Taxol (P Conclusions These results confirm that HA117 is a strong MDR gene in both HL-60 and 4T1 cells. Furthermore, our results indicate that the MDR

  19. The 2013 SFRBM discovery award: selected discoveries from the butterfield laboratory of oxidative stress and its sequela in brain in cognitive disorders exemplified by Alzheimer disease and chemotherapy induced cognitive impairment.

    Science.gov (United States)

    Butterfield, D Allan

    2014-09-01

    This retrospective review on discoveries of the roles of oxidative stress in brain of subjects with Alzheimer disease (AD) and animal models thereof as well as brain from animal models of chemotherapy-induced cognitive impairment (CICI) results from the author receiving the 2013 Discovery Award from the Society for Free Radical Biology and Medicine. The paper reviews our laboratory's discovery of protein oxidation and lipid peroxidation in AD brain regions rich in amyloid β-peptide (Aβ) but not in Aβ-poor cerebellum; redox proteomics as a means to identify oxidatively modified brain proteins in AD and its earlier forms that are consistent with the pathology, biochemistry, and clinical presentation of these disorders; how Aβ in in vivo, ex vivo, and in vitro studies can lead to oxidative modification of key proteins that also are oxidatively modified in AD brain; the role of the single methionine residue of Aβ(1-42) in these processes; and some of the potential mechanisms in the pathogenesis and progression of AD. CICI affects a significant fraction of the 14 million American cancer survivors, and due to diminished cognitive function, reduced quality of life of the persons with CICI (called "chemobrain" by patients) often results. A proposed mechanism for CICI employed the prototypical ROS-generating and non-blood brain barrier (BBB)-penetrating chemotherapeutic agent doxorubicin (Dox, also called adriamycin, ADR). Because of the quinone moiety within the structure of Dox, this agent undergoes redox cycling to produce superoxide free radical peripherally. This, in turn, leads to oxidative modification of the key plasma protein, apolipoprotein A1 (ApoA1). Oxidized ApoA1 leads to elevated peripheral TNFα, a proinflammatory cytokine that crosses the BBB to induce oxidative stress in brain parenchyma that affects negatively brain mitochondria. This subsequently leads to apoptotic cell death resulting in CICI. This review outlines aspects of CICI consistent with

  20. The 2013 Discovery Award from the Society for Free Radical Biology and Medicine: Selected Discoveries from the Butterfield Laboratory of Oxidative Stress and Its Sequelae in Brain in Cognitive Disorders Exemplified by Alzheimer Disease and Chemotherapy Induced Cognitive Impairment

    Science.gov (United States)

    Butterfield, D. Allan

    2014-01-01

    This retrospective review on discoveries of the roles of oxidative stress in brain of subjects with Alzheimer disease (AD) and animal models thereof as well as brain from animal models of chemotherapy induced cognitive impairment (CICI) results from the author receiving the 2013 Discovery Award from the Society for Free Radical Biology and Medicine. The paper reviews our laboratory's discovery of: protein oxidation and lipid peroxidation in AD brain regions rich in amyloid β-peptide (Aβ) but not in Aβ-poor cerebellum; redox proteomics as a means to identify oxidatively modified brain proteins in AD and its earlier forms that are consistent with the pathology, biochemistry, and clinical presentation of these disorders; how Aβ in in vivo, ex vivo, and in vitro studies can lead to oxidative modification of key proteins that also are oxidatively modified in AD brain; the role of the single methionine residue of Aβ(1-42) in these processes; and some of the potential mechanisms in the pathogenesis and progression of AD. CICI affects a significant fraction of the 14 million American cancer survivors, and due to diminished cognitive function, reduced quality of life of the persons with CICI (called “chemobrain” by patients) often results. A proposed mechanism for CICI employed the prototypical ROS-generating and non-blood brain barrier (BBB)-penetrating chemotherapeutic agent doxorubicin (Dox, also called adriamycin, ADR). Because of the quinone moiety within the structure of Dox, this agent undergoes redox cycling to produce superoxide free radical peripherally. This, in turn, leads to oxidative modification of the key plasma protein, Apolipoprotein A1 (ApoA1). Oxidized ApoA1 leads to elevated peripheral TNFα, a pro-inflammatory cytokine that crosses the BBB to induce oxidative stress in brain parenchyma that affects negatively brain mitochondria. This subsequently leads to apoptotic cell death resulting in CICI. This review outlines aspects of CICI consistent

  1. Involved-Site Image-Guided Intensity Modulated Versus 3D Conformal Radiation Therapy in Early Stage Supradiaphragmatic Hodgkin Lymphoma

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    Filippi, Andrea Riccardo, E-mail: andreariccardo.filippi@unito.it [Department of Oncology, University of Torino, Torino (Italy); Ciammella, Patrizia [Radiation Therapy Unit, Department of Oncology and Advanced Technology, ASMN Hospital IRCCS, Reggio Emilia (Italy); Piva, Cristina; Ragona, Riccardo [Department of Oncology, University of Torino, Torino (Italy); Botto, Barbara [Hematology, Città della Salute e della Scienza, Torino (Italy); Gavarotti, Paolo [Hematology, University of Torino and Città della Salute e della Scienza, Torino (Italy); Merli, Francesco [Hematology Unit, ASMN Hospital IRCCS, Reggio Emilia (Italy); Vitolo, Umberto [Hematology, Città della Salute e della Scienza, Torino (Italy); Iotti, Cinzia [Radiation Therapy Unit, Department of Oncology and Advanced Technology, ASMN Hospital IRCCS, Reggio Emilia (Italy); Ricardi, Umberto [Department of Oncology, University of Torino, Torino (Italy)

    2014-06-01

    Purpose: Image-guided intensity modulated radiation therapy (IG-IMRT) allows for margin reduction and highly conformal dose distribution, with consistent advantages in sparing of normal tissues. The purpose of this retrospective study was to compare involved-site IG-IMRT with involved-site 3D conformal RT (3D-CRT) in the treatment of early stage Hodgkin lymphoma (HL) involving the mediastinum, with efficacy and toxicity as primary clinical endpoints. Methods and Materials: We analyzed 90 stage IIA HL patients treated with either involved-site 3D-CRT or IG-IMRT between 2005 and 2012 in 2 different institutions. Inclusion criteria were favorable or unfavorable disease (according to European Organization for Research and Treatment of Cancer criteria), complete response after 3 to 4 cycles of an adriamycin- bleomycin-vinblastine-dacarbazine (ABVD) regimen plus 30 Gy as total radiation dose. Exclusion criteria were chemotherapy other than ABVD, partial response after ABVD, total radiation dose other than 30 Gy. Clinical endpoints were relapse-free survival (RFS) and acute toxicity. Results: Forty-nine patients were treated with 3D-CRT (54.4%) and 41 with IG-IMRT (45.6%). Median follow-up time was 54.2 months for 3D-CRT and 24.1 months for IG-IMRT. No differences in RFS were observed between the 2 groups, with 1 relapse each. Three-year RFS was 98.7% for 3D-CRT and 100% for IG-IMRT. Grade 2 toxicity events, mainly mucositis, were recorded in 32.7% of 3D-CRT patients (16 of 49) and in 9.8% of IG-IMRT patients (4 of 41). IG-IMRT was significantly associated with a lower incidence of grade 2 acute toxicity (P=.043). Conclusions: RFS rates at 3 years were extremely high in both groups, albeit the median follow-up time is different. Acute tolerance profiles were better for IG-IMRT than for 3D-CRT. Our preliminary results support the clinical safety and efficacy of advanced RT planning and delivery techniques in patients affected with early stage HL, achieving complete

  2. Interim PET After Two ABVD Cycles in Early-Stage Hodgkin Lymphoma: Outcomes Following the Continuation of Chemotherapy Plus Radiotherapy

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    Simontacchi, Gabriele [Radiotherapy Unit, Azienda Ospedaliera Universitaria Careggi, University of Florence, Florence (Italy); Filippi, Andrea Riccardo, E-mail: andreariccardo.filippi@unito.it [Department of Oncology, University of Torino, Torino (Italy); Ciammella, Patrizia [Radiation Oncology Unit, Department of Advanced Technology, Arcispedale Santa Maria Nuova, Istituto di Ricovero e Cura a Carattere Scientifico, Reggio Emilia (Italy); Buglione, Michela [Radiation Oncology Department, University and Spedali Civili, Brescia (Italy); Saieva, Calogero [Molecular and Nutritional Epidemiology Unit, Cancer Research and Prevention Institute, Florence (Italy); Magrini, Stefano Maria [Radiation Oncology Department, University and Spedali Civili, Brescia (Italy); Livi, Lorenzo [Radiotherapy Unit, Azienda Ospedaliera Universitaria Careggi, University of Florence, Florence (Italy); Iotti, Cinzia [Radiation Oncology Unit, Department of Advanced Technology, Arcispedale Santa Maria Nuova, Istituto di Ricovero e Cura a Carattere Scientifico, Reggio Emilia (Italy); Botto, Barbara [Hematology Unit, Città della Salute e della Scienza Hospital, Torino (Italy); Vaggelli, Luca [Nuclear Medicine Department, Azienda Ospedaliera Universitaria Careggi, University of Florence, Florence (Italy); Re, Alessandro [Hematology Unit, University and Spedali Civili, Brescia (Italy); Merli, Francesco [Hematology Unit, Arcispedale Santa Maria Nuova, Istituto di Ricovero e Cura a Carattere Scientifico, Reggio Emilia (Italy); Ricardi, Umberto [Department of Oncology, University of Torino, Torino (Italy)

    2015-08-01

    Purpose: This multicenter retrospective study was designed to evaluate the prognostic role of interim fluorodeoxyglucose-labeled positron emission tomography (i-FDG-PET) in a cohort of patients affected with early-stage Hodgkin lymphoma (HL) treated initially with adriamycin, bleomycin, vinblastine, dacarbazine (ABVD) chemotherapy followed by radiation therapy, and to assess the role of chemotherapy continuation plus radiation therapy for i-FDG-PET-positive patients. Methods and Materials: Data from 257 patients were retrieved from 4 hematology and radiation oncology departments. Inclusion criteria were stage I to IIAB HL, “intention-to-treat” AVBD plus radiation therapy, and FDG-PET at diagnosis and after the first 2 ABVD cycles. All i-FDG-PET scans underwent blinded local review by using the Deauville 5-point scoring system; patients were stratified as negative or positive using 2 Deauville score cutoff values, ≥3 or ≥4. Results: Median follow-up time was 56 months (range: 9-163 months); 5-year overall survival (OS) and disease-specific survival (DSS) for the whole cohort were 97.5% and 98.3%, respectively. Five-year progression-free survival (PFS) was 95.6%. After i-FDG-PET revision, 43 of 257 patients (16.7%) had a positive i-FDG-PET (Deauville scores: 3-5). Five-year PFS rates for i-FDG-PET-negative and i-FDG-PET-positive patients were 98.1% and 83.7%, respectively, if using a Deauville score cutoff of 3, and 97.7% and 78.6%, respectively, if using a cutoff of 4 (P=.0001). Five-year OS for i-FDG-PET-negative and i-FDG-PET-positive patients was 98.5% and 93.0%, respectively, if using a cutoff of 3, and 98.6% and 89.3%, respectively, if using a cutoff of 4 (P=.029 and P=.002). At univariate regression analysis, i-FDG-PET positivity was associated with worse OS and PFS. At multivariate analysis, performed only for PFS, i-FDG-PET positivity confirmed its negative impact (P=.002). Conclusions: i-FDG-PET is prognostic for PFS and OS in early-stage HL

  3. Independent prognostic impact of tumour-infiltrating macrophages in early-stage Hodgkin's lymphoma.

    Science.gov (United States)

    Gotti, Manuel; Nicola, Marta; Lucioni, Marco; Fiaccadori, Valeria; Ferretti, Virginia; Sciarra, Roberta; Costanza, Mariangela; Bono, Elisa; Molo, Silvana; Maffi, Aldo; Croci, Giorgio A; Varettoni, Marzia; Frigeni, Marco; Pascutto, Cristiana; Arcaini, Luca; Bonfichi, Maurizio; Paulli, Marco; Cazzola, Mario

    2017-09-01

    Although patients with early-stage Hodgkin's lymphoma have a high rate of cure, a portion of these are resistant to or relapse after standard treatment. Current prognostic criteria based on clinical and laboratory parameters at diagnosis do not allow to accurately identify the subset of patients with less favourable clinical outcome. An increased number of tumour-infiltrating macrophages was found to be associated with shortened survival in patients with classic Hodgkin's Lymphoma. The aim of this study was to assess the clinical significance of the proportion of CD68-positive infiltrating macrophages in patients with early-stage classic Hodgkin's lymphoma. By using immunohistochemistry technique, we evaluated for CD68 expression diagnostic biopsies of 106 patients affected by supradiaphragmatic early-stage classic Hodgkin's lymphoma treated at our institution since 2000 to 2010. All patients were treated with adriamycin, bleomycin, vinblastine, and dacarbazine chemotherapy followed by radiotherapy in the majority. The 2-year overall survival and progression-free survival (PFS) in the entire cohort were 97% and 83% respectively. The 2-year PFS was statistically different between patients with favourable and those with unfavourable prognosis according to the European Organisation for Research and Treatment of Cancer (EORTC) risk criteria (96% vs 79%, p = 0.039) and between patients having less than 25% of CD68-positive infiltrating macrophages and those with more than 25% (85% vs 67%, p = 0.012). All patients with favourable EORTC criteria had CD68 expression lower than 25%. Within those with unfavourable EORTC criteria, patients with a CD68+ count greater than 25% had a worse 2-year PFS than patients having values lower than 25% (64% vs 82%, p = 0.03). Moreover, in multivariate analysis, after adjusting for CD68+ macrophages count and EORTC score, only CD68+ macrophages count higher than 25% retained a prognostic effect on PFS (hazard ratio = 2

  4. An integrated approach to the prediction of chemotherapeutic response in patients with breast cancer.

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    Kelly H Salter

    Full Text Available A major challenge in oncology is the selection of the most effective chemotherapeutic agents for individual patients, while the administration of ineffective chemotherapy increases mortality and decreases quality of life in cancer patients. This emphasizes the need to evaluate every patient's probability of responding to each chemotherapeutic agent and limiting the agents used to those most likely to be effective.Using gene expression data on the NCI-60 and corresponding drug sensitivity, mRNA and microRNA profiles were developed representing sensitivity to individual chemotherapeutic agents. The mRNA signatures were tested in an independent cohort of 133 breast cancer patients treated with the TFAC (paclitaxel, 5-fluorouracil, adriamycin, and cyclophosphamide chemotherapy regimen. To further dissect the biology of resistance, we applied signatures of oncogenic pathway activation and performed hierarchical clustering. We then used mRNA signatures of chemotherapy sensitivity to identify alternative therapeutics for patients resistant to TFAC. Profiles from mRNA and microRNA expression data represent distinct biologic mechanisms of resistance to common cytotoxic agents. The individual mRNA signatures were validated in an independent dataset of breast tumors (P = 0.002, NPV = 82%. When the accuracy of the signatures was analyzed based on molecular variables, the predictive ability was found to be greater in basal-like than non basal-like patients (P = 0.03 and P = 0.06. Samples from patients with co-activated Myc and E2F represented the cohort with the lowest percentage (8% of responders. Using mRNA signatures of sensitivity to other cytotoxic agents, we predict that TFAC non-responders are more likely to be sensitive to docetaxel (P = 0.04, representing a viable alternative therapy.Our results suggest that the optimal strategy for chemotherapy sensitivity prediction integrates molecular variables such as ER and HER2 status with corresponding micro

  5. [Analysis of the diagnosis and treatment of desmoplastic small round cell tumor].

    Science.gov (United States)

    Lu, Baojian; Zhang, Wei; Shang, Zhiqun; Sun, Erlin; Nian, Xuewu; Gao, Jingda; Ma, Chengquan; Han, Ruifa

    2015-09-01

    To explore the clinical diagnostic features and treatment of desmoplastic small round cell tumor (DSRCT), and to improve the understanding and management of this tumor. The clinicopathological data of nine patients treated in our hospital from October 2004 to June 2014 were retrospectively analyzed and a review of the literature was made. The clinical manifestations, pathological characteristics, diagnosis and differential diagnosis, treatment and prognosis of this tumor were summarized and analyzed. Nine patients with DSRCT, 5 males and 4 females, with an average age of 21 years (range 8-56 years) were included in this study. Ultrasound examination revealed irregular low-density mass shadow in the abdominal cavity. CT examination found that 6 cases had abdominal and retroperitoneal multiple solid tumor nodules, uneven density, and visible low density fluid area. Postoperative pathological examination revealed that the tumor cells were small, mostly elliptic, gathered to form clear structure of nests with clear irregular boundaries. The central portion of large tumor nests often showed necrosis. Scattered fibroblasts and large amount of hyalinization of collagen fibers were seen in the interstitial tissue around the nests. Six patients received laparotomy surgery, however, all failed to resect the tumor completely. Three patients received postoperative chemotherapy, i. e. two cases had carboplatin and paclitaxel chemotherapy, and one case of chemotherapy regimen not specified. Two patients had radiation and chemotherapy (no concrete plan was available). Another case was lost to follow-up. Two of the three patients without surgery received chemotherapy with CAP (cyclophosphamide+adriamycin+carboplatin) and total rectal lesions, pelvic and inguinal lymph nodes, ilium metastases radiation therapy. Another one patient received EP regimen (DDP+VP16) which was then changed into a TP chemotherapy alone. Eight of the nine cases died shortly after surgery, and only one

  6. Anti-estrogen resistance in breast cancer is induced by the tumor microenvironment and can be overcome by inhibiting mitochondrial function in epithelial cancer cells.

    Science.gov (United States)

    Martinez-Outschoorn, Ubaldo E; Goldberg, Allison; Lin, Zhao; Ko, Ying-Hui; Flomenberg, Neal; Wang, Chenguang; Pavlides, Stephanos; Pestell, Richard G; Howell, Anthony; Sotgia, Federica; Lisanti, Michael P

    2011-11-15

    Here, we show that tamoxifen resistance is induced by cancer-associated fibroblasts (CAFs). Coculture of estrogen receptor positive (ER+) MCF7 cells with fibroblasts induces tamoxifen and fulvestrant resistance with 4.4 and 2.5-fold reductions, respectively, in apoptosis compared with homotypic MCF7 cell cultures. Treatment of MCF7 cells cultured alone with high-energy mitochondrial "fuels" (L-lactate or ketone bodies) is sufficient to confer tamoxifen resistance, mimicking the effects of coculture with fibroblasts. To further demonstrate that epithelial cancer cell mitochondrial activity is the origin of tamoxifen resistance, we employed complementary pharmacological and genetic approaches. First, we studied the effects of two mitochondrial "poisons," namely metformin and arsenic trioxide (ATO), on fibroblast-induced tamoxifen resistance. We show here that treatment with metformin or ATO overcomes fibroblast-induced tamoxifen resistance in MCF7 cells. Treatment with the combination of tamoxifen plus metformin or ATO leads to increases in glucose uptake in MCF7 cells, reflecting metabolic uncoupling between epithelial cancer cells and fibroblasts. In coculture, tamoxifen induces the upregulation of TIGAR (TP53-induced glycolysis and apoptosis regulator), a p53 regulated gene that simultaneously inhibits glycolysis, autophagy and apoptosis and reduces ROS generation, thereby promoting oxidative mitochondrial metabolism. To genetically mimic the effects of coculture, we next recombinantly overexpressed TIGAR in MCF7 cells. Remarkably, TIGAR overexpression protects epithelial cancer cells from tamoxifen-induced apoptosis, providing genetic evidence that increased mitochondrial function confers tamoxifen resistance. Finally, CAFs also protect MCF7 cells against apoptosis induced by other anticancer agents, such as the topoisomerase inhibitor doxorubicin (adriamycin) and the PARP-1 inhibitor ABT-888. These results suggest that the tumor microenvironment may be a general

  7. Atrial Function in Patients with Breast Cancer After Treatment with Anthracyclines

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    Yalin Tolga Yaylali

    Full Text Available Abstract Background: Atrial electromechanical delay (EMD is used to predict atrial fibrillation, measured by echocardiography. Objectives: The aim of this study was to assess atrial EMD and mechanical function after anthracycline-containing chemotherapy. Methods: Fifty-three patients with breast cancer (48 ± 8 years old who received 240 mg/m2of Adriamycin, 2400 mg/m2 of cyclophosphamide, and 960 mg/m2 of paclitaxel were included in this retrospective study, as were 42 healthy subjects (47 ± 9 years old. Echocardiographic measurements were performed 11 ± 7 months (median 9 months after treatment with anthracyclines. Results: Left intra-atrial EMD (11.4 ± 6.0 vs. 8.1 ± 4.9, p=0.008 and inter-atrial EMD (19.7 ± 7.4 vs. 14.7 ± 6.5, p=0.001 were prolonged; LA passive emptying volume and fraction were decreased (p=0.0001 and p=0.0001; LA active emptying volume and fraction were increased (p=0.0001 and p=0.0001; Mitral A velocity (0.8 ± 0.2 vs. 0.6 ± 0.2, p=0.0001 and mitral E-wave deceleration time (201.2 ± 35.6 vs. 163.7 ± 21.8, p=0.0001 were increased; Mitral E/A ratio (1.0 ± 0.3 vs. 1.3 ± 0.3, p=0.0001 and mitral Em (0.09 ± 0.03 vs. 0.11 ± 0.03, p=0.001 were decreased; Mitral Am (0.11 ± 0.02 vs. 0.09 ± 0.02, p=0.0001 and mitral E/Em ratio (8.8 ± 3.2 vs. 7.6 ± 2.6, p=0.017 were increased in the patients. Conclusions: In patients with breast cancer after anthracycline therapy: Left intra-atrial, inter-atrial electromechanical intervals were prolonged. Diastolic function was impaired. Impaired left ventricular relaxation and left atrial electrical conduction could be contributing to the development of atrial arrhythmias.

  8. Grape seed procyanidin reversal of p-glycoprotein associated multi-drug resistance via down-regulation of NF-κB and MAPK/ERK mediated YB-1 activity in A2780/T cells.

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    Bo-xin Zhao

    Full Text Available The expression and function of P-glycoprotein (P-gp is associated with the phenotype of multi-drug resistance (MDR, leading chemotherapy failure of patients suffered with cancer. Grape seed procyanidin(GSP is a natural polyphenol supplement with anti-inflammatory effect. Present study assessed a new use of GSP on the MDR reversal activity and its possible molecular mechanisms in MDR1-overpressing paclitaxel resistant ovarian cancer cells. Our results showed GSP significantly enhanced the cytotoxicity of paclitaxel and adriamycin in paclitaxel resistant A2780/T cells but its parental A2780 cells. Furthermore, GSP strongly inhibited P-gp expression by blocking MDR1 gene transcription, as well as, increased the intracellular accumulation of the P-gp substrate rhodamine-123 in A2780/T cells. Nuclear factor-κB(NF-κB activity, IκB degradation level and NF-κB/p65 nuclear translocation induced by lipopolysaccharide (LPS and receptor activator for nuclear factor-κB ligand (RANKL were markedly inhibited by pre-treatment with GSP. Meanwhile, GSP inhibited MAPK/ERK pathway by decreasing the phosphorylation of ERK1/2, resulting in reduced the Y-box binding protein 1 (YB-1 activation with blocking its nuclear translocation. Moreover, the up-regulation of P-gp expression, the activation of AKT/NF-κB and MAPK/ERK pathway induced by LPS was attenuated by GSP administration. Compared with PDTC and U1026, inhibitor of NF-κB and MAPK/ERK respectively, GSP showed the same tendency of down-regulating NF-κB and MAPK/ERK mediated YB-1 activities. Thus, GSP reverses P-gp associated MDR by inhibiting the function and expression of P-gp through down-regulation of NF-κB activity and MAPK/ERK pathway mediated YB-1 nuclear translocation, offering insight into the mechanism of reversing MDR by natural polyphenol supplement compounds. GSP could be a new potential MDR reversal agent used for combination therapy with chemotherapeutics in clinic.

  9. Effectiveness of multi-drug regimen chemotherapy treatment in osteosarcoma patients: a network meta-analysis of randomized controlled trials.

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    Wang, Xiaojie; Zheng, Hong; Shou, Tao; Tang, Chunming; Miao, Kun; Wang, Ping

    2017-03-29

    Osteosarcoma is the most common malignant bone tumour. Due to the high metastasis rate and drug resistance of this disease, multi-drug regimens are necessary to control tumour cells at various stages of the cell cycle, eliminate local or distant micrometastases, and reduce the emergence of drug-resistant cells. Many adjuvant chemotherapy protocols have shown different efficacies and controversial results. Therefore, we classified the types of drugs used for adjuvant chemotherapy and evaluated the differences between single- and multi-drug chemotherapy regimens using network meta-analysis. We searched electronic databases, including PubMed (MEDLINE), EmBase, and the Cochrane Library, through November 2016 using the keywords "osteosarcoma", "osteogenic sarcoma", "chemotherapy", and "random*" without language restrictions. The major outcome in the present analysis was progression-free survival (PFS), and the secondary outcome was overall survival (OS). We used a random effect network meta-analysis for mixed multiple treatment comparisons. We included 23 articles assessing a total of 5742 patients in the present systematic review. The analysis of PFS indicated that the T12 protocol (including adriamycin, bleomycin, cyclophosphamide, dactinomycin, methotrexate, cisplatin) plays a more critical role in osteosarcoma treatment (surface under the cumulative ranking (SUCRA) probability 76.9%), with a better effect on prolonging the PFS of patients when combined with ifosfamide (94.1%) or vincristine (81.9%). For the analysis of OS, we separated the regimens to two groups, reflecting the disconnection. The T12 protocol plus vincristine (94.7%) or the removal of cisplatinum (89.4%) is most likely the best regimen. We concluded that multi-drug regimens have a better effect on prolonging the PFS and OS of osteosarcoma patients, and the T12 protocol has a better effect on prolonging the PFS of osteosarcoma patients, particularly in combination with ifosfamide or vincristine

  10. Is drug-induced toxicity a good predictor of response to neo-adjuvant chemotherapy in patients with breast cancer? -A prospective clinical study

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    Singh JP

    2004-08-01

    Full Text Available Abstract Background Neo-adjuvant chemotherapy is an integral part of multi-modality approach in the management of locally advanced breast cancer and it is vital to predict the response in order to tailor the regime for a patient. The common final pathway in the tumor cell death is believed to be apoptosis or programmed cell death and chemotherapeutic drugs like other DNA-damaging agents act on rapidly multiplying cells including both the tumor and the normal cells by following the same common final pathway. This could account for both the toxic effects and the response. Absence or decreased apoptosis has been found to be associated with chemo resistance. The change in expression of apoptotic markers (Bcl-2 and Bax proteins brought about by various chemotherapeutic regimens is being used to identify drug resistance in the tumor cells. A prospective clinical study was conducted to assess whether chemotherapy induced toxic effects could serve as reliable predictors of apoptosis or response to neo-adjuvant chemotherapy in patients with locally advanced breast cancer. Methods 50 cases of locally advanced breast cancer after complete routine and metastatic work up were subjected to trucut biopsy and the tissue evaluated immunohistochemically for apoptotic markers (bcl-2/bax ratio. Three cycles of Neoadjuvant Chemotherapy using FAC regime (5-fluorouracil, adriamycin, cyclophosphamide were given at three weekly intervals and patients assessed for clinical response as well as toxicity after each cycle. Modified radical mastectomy was performed in all patients three weeks after the last cycle and the specimen were re-evaluated for any change in the bcl-2/bax ratio. The clinical response, immunohistochemical response and the drug-induced toxicity were correlated and compared. Descriptive studies were performed with SPSS version 10 and the significance of response was assessed using paired t-test. Significance of correlation between various variables was

  11. Ethnobotanical survey and cytotoxicity testing of plants of South-western Nigeria used to treat cancer, with isolation of cytotoxic constituents from Cajanus cajan Millsp. leaves.

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    Ashidi, J S; Houghton, P J; Hylands, P J; Efferth, T

    2010-03-24

    There is only scant literature on the anticancer components of medicinal plants from Nigeria, yet traditional healers in the area under study claim to have been managing the disease in their patients with some success using the species studied. To document plants commonly used to treat cancer in South-western Nigeria and to test the scientific basis of the claims using in vitro cytotoxicity tests. Structured questionnaires were used to explore the ethnobotanical practices amongst the traditional healers. Methanol extracts of the most common species cited were screened for cytotoxicity using the sulforhodamine B (SRB) assay in both exposure and recovery experiments. Three cancer cell lines (human breast adenocarcinoma cell line MCF-7, human large cell lung carcinoma cell line COR-L23 and human amelanotic melanoma C32) and one normal cell line (normal human keratinocytes SVK-14) were used for the screening of the extracts and the fractions obtained. The extract of Cajanus cajan showed considerable activity and was further partitioned and the dichloromethane fraction was subjected to preparative chomatography to yield six compounds: hexadecanoic acid methyl ester, alpha-amyrin, beta-sitosterol, pinostrobin, longistylin A and longistylin C. Pinostrobin and longistylins A and C were tested for cytotoxicity on the cancer cell lines. In addition, an adriamycin-sensitive acute T-lymphoblastic leukaemia cell line (CCRF-CEM) and its multidrug-resistant sub-line (CEM/ADR5000) were used in an XTT assay to evaluate the activity of the pure compounds obtained. A total of 30 healers from S W Nigeria were involved in the study. 45 species were recorded with their local names with parts used in the traditional therapeutic preparations. Cytotoxicity (IC(50) values less than 50 microg/mL) was observed in 5 species (Acanthospermum hispidum, Cajanus cajan, Morinda lucida, Nymphaea lotus and Pycnanthus angolensis). Acanthospermum hispidum and Cajanus cajan were the most active. The

  12. CLDN6 promotes chemoresistance through GSTP1 in human breast cancer

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    Minlan Yang

    2017-11-01

    Full Text Available Abstract Background Claudin-6 (CLDN6, a member of CLDN family and a key component of tight junction, has been reported to function as a tumor suppressor in breast cancer. However, whether CLDN6 plays any role in breast cancer chemoresistance remains unclear. In this study, we investigated the role of CLDN6 in the acquisition of chemoresistance in breast cancer cells. Methods We manipulated the expression of CLDN6 in MCF-7 and MCF-7/MDR cells with lv-CLDN6 and CLDN6-shRNA and investigated whether CLDN6 manipulation lead to different susceptibilities to several chemotherapeutic agents in these cells. The cytotoxicity of adriamycin (ADM, 5-fluorouracil (5-FU, and cisplatin (DDP was tested by cck-8 assay. Cell death was determined by DAPI nuclear staining. The enzyme activity of glutanthione S-transferase-p1 (GSTP1 was detected by a GST activity kit. Then lv-GSTP1 and GSTP1-shRNA plasmids were constructed to investigate the potential of GSTP1 in regulating chemoresistance of breast cancer. The TP53-shRNA was adopted to explore the regulation mechanism of GSTP1. Finally, immunohistochemistry was used to explore the relationship between CLDN6 and GSTP1 expression in breast cancer tissues. Results Silencing CLDN6 increased the cytotoxicity of ADM, 5-FU, and DDP in MCF-7/MDR cells. Whereas overexpression of CLDN6 in MCF-7, the parental cell line of MCF-7/MDR expressing low level of CLDN6, increased the resistance to the above drugs. GSTP1 was upregulated in CLDN6-overexpressed MCF-7 cells. RNAi –mediated silencing of CLDN6 downregulated both GSTP1 expression and GST enzyme activity in MCF-7/MDR cells. Overexpresssion of GSTP1 in CLDN6 silenced MCF-7/MDR cells restored chemoresistance, whereas silencing GSTP1 reduced the chemoresistance due to ectopic overexpressed of CLDN6 in MCF-7 cells. These observations were also repeated in TNBC cells Hs578t. We further confirmed that CLDN6 interacted with p53 and promoted translocation of p53 from nucleus to

  13. The Reversal Effect and Its Mechanisms of Tetramethylpyrazine on Multidrug Resistance in Human Bladder Cancer.

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    Shanshan Wang

    Full Text Available Chemotherapy is an important strategy for the treatment of bladder cancer. However, the main problem limiting the success of chemotherapy is the development of multidrug resistance (MDR. To improve the management of bladder cancer, it is an urgent matter to search for strategies to reverse MDR. We chose three kinds of herbal medicines including ginsenoside Rh2, (--Epigallocatechin gallate (EGCG and Tetramethylpyrazine (TMP to detect their effects on bladder cancer. Reversal effects of these three herbal medicines for drug resistance in adriamycin (ADM-resistant Pumc-91 cells (Pumc-91/ADM were assessed by Cell Counting Kit-8 (CCK-8 cell proliferation assay system. The mechanisms of reversal effect for TMP were explored in Pumc-91/ADM and T24/DDP cells. After Pumc-91/ADM and T24/DDP cells were treated with TMP, cell cycle distribution analysis was performed by flow cytometry. The expression of MRP1, GST, BCL-2, LRP and TOPO-II was evaluated using quantitative real-time polymerase chain reaction (qRT-PCR, immunefluorescence assay and western blot. It was observed that TMP was capable of enhancing the cytotoxicity of anticancer agents on Pumc-91/ADM cells in response to ADM, however Rh2 and EGCG were unable to. The reversal effect of TMP was also demonstrated in T24/DDP cells. Moreover, the treatment with TMP in Pumc-91/ADM and T24/DDP cells led to an increased of G1 phase accompanied with a concomitant decrease of cell numbers in S phase. Compared to the control group, an obvious decrease of MRP1, GST, BCL-2 and an increase of TOPO-II were shown in TMP groups with a dose-dependency in mRNA and protein levels. However, there was no difference on LRP expression between TMP groups and the control group. TMP could effectively reverse MDR of Pumc-91/ADM and T24/DDP cells and its mechanisms might be correlated with the alteration of MRP1, GST, BCL-2 and TOPO-II. TMP might be a potential candidate for reversing drug resistance in bladder cancer

  14. Efficacy, safety, and lack of interactions with the use of raltegravir in HIV-infected patients undergoing antineoplastic chemotherapy.

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    Bañón, Sara; Machuca, Isabel; Araujo, Susana; Moreno, Ana; Perez-Elías, María J; Moreno, Santiago; Casado, Jose Luis

    2014-01-01

    Concomitant use of combination antiretroviral regimen (cART) and cancer chemotherapy is difficult due to complex interactions and increased toxicity. Raltegravir could be an adequate option through its favourable drug-drug interaction profile. Prospective longitudinal study of HIV patients with cancer, AIDS related or not, undergoing chemotherapy. Patients without resistance or previous failure were switched or initiated raltegravir plus two nucleoside analogues. Plasma trough levels of raltegravir were measured. Overall, 28 patients receiving a raltegravir-based regimen (4 naive) with tenofovir-emtricitabine (18 cases) or abacavir-lamivudine (10 cases) were included. Mean age was 46.2 years (IQR, 39-52.7), and 79% were male. Median time of HIV was 201.7 months, CD4+ nadir was 268 cells/mm(3), and 75% had previous AIDS. At the diagnosis of neoplasia, 17 were on protease inhibitors and 4 with efavirenz. Ten patients had a non-HIV-related cancer (three breast, two pancreatic, one Ewing sarcoma, one myeloblastic leukemia, one melanoma, one parotid adenocarcinoma, one lung), and 18 had an HIV-related cancer (nine non-Hodgkin lymphoma, seven Hodgkin disease, two anal). Overall, 43% of patients received more than one line of chemotherapy, including antimetabolites in 12 patients (5-FU, capecitabine, methotrexate, gemcitabine), alkylating agents in 12 cases (ciclophosphamide, iphosphamide), vinca alkaloids in 20 patients (vincristine, vinblastine, vindesine), antitumor antibiotics in 16 cases (adriamycin), cisplatin o carboplatin in six and monoclonal antibodies in six patients (rituximab, trastuzumab, cetuximab). Six patients modified the doses of antineoplastic agents due to toxicity (four neutropenia), not related to raltegravir. During a median follow up of 12.7 patients-year in concomitant therapy, there was only 1 case of virological failure and no patient discontinued raltegravir. Plasma concentrations of raltegravir in eight patients showed a median concentration

  15. A possible coincidence of cytomegalovirus retinitis and intraocular lymphoma in a patient with systemic non-Hodgkin’s lymphoma

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    Svozílková Petra

    2013-01-01

    Full Text Available Abstract Purpose To present a possible coincidence of cytomegalovirus retinitis and intraocular lymphoma in a patient with systemic non-Hodgkin’s lymphoma. Case presentation A 47-year-old woman presented with decreased visual acuity associated with white retinal lesions in both eyes. A history of pneumonia of unknown aetiology closely preceded the deterioration of vision. Five years previously the patient was diagnosed with follicular non-Hodgkin’s lymphoma. She was treated with a chemotherapy regimen comprised of cyclophosphamide, adriamycin, vincristin, and prednisone with later addition of the anti-CD20 antibody rituximab. She experienced a relapse 19 months later with involvement of the retroperitoneal lymph nodes, and commenced treatment with rituximab and 90Y-ibritumomab tiuxetan. A second relapse occurred 22 months after radioimmunotherapy and was treated with a combination of fludarabine, cyclophosphamide, and mitoxantrone followed by rituximab. The patient experienced no further relapses until the current presentation (April, 2010. Pars plana vitrectomy with vitreous fluid analysis was performed in the right eye. PCR testing confirmed the presence of cytomegalovirus in the vitreous. Atypical lymphoid elements, highly suspicious of malignancy were also found on cytologic examination. Intravenous foscarnet was administered continually for three weeks, followed by oral valganciclovir given in a dose of 900 mg twice per day. In addition, the rituximab therapy continued at three monthly intervals. Nevertheless, cessation of foscarnet therapy was followed by a recurrence of retinitis on three separate occasions during a 3-month period instigating its reinduction to the treatment regime after each recurrence. Conclusions Cytomegalovirus retinitis is an opportunistic infection found in AIDS patients as well as in bone marrow and solid organ transplant recipients being treated with systemic immunosuppressive drugs. This case presents a less

  16. [A case of effective trastuzumab plus gemcitabine therapy for human epidermal growth factor receptor 2-positive breast cancer].

    Science.gov (United States)

    Yabe, Nobushige; Murai, Shinji; Shimizu, Hirotomo; Kitasato, Kenjiro; Yoshikawa, Takahisa; Oto, Ippei; Nakadai, Junpei; Jinno, Hiromitsu; Kitagawa, Yuko

    2013-11-01

    A 71-year-old postmenopausal woman was undergoing treatment for depression. She visited the hospital with a chief complaint of fibrosclerosis of the entire left breast 8 years previously. She was diagnosed as having stage IV( T3N1M1b) left breast cancer (papillotubular>scirrhous carcinoma, g+, f+, estrogen receptor [ER]-negative, progesterone receptor [PgR]-negative, and human epidermal growth factor receptor 2[ HER2/neu]-positive[ 3+]). Synchronous bone metastases were detected in the left tenth rib, the eleventh dorsal vertebra, and in the area spanning the lower lumbar to sacral vertebrae. First-line treatment was systemic therapy with 4 cycles of Adriamycin and cyclophosphamide (AC) followed by 4 cycles of trastuzumab and paclitaxel. The breast mass initially observed on clinical imaging disappeared and only calcifications were observed. Bone metastases were detected only in the left tenth rib. As an additional therapy, 3-dimensional radiotherapy( 50 Gy/25 fractions), which irradiated the left mammary gland, axilla, and supraclavicular fossa, was administered. The tumor was well controlled for approximately 3 years. However, a gradual increase in the level of carcinoembryonic antigen( CEA) was accompanied by an increase in the left breast mass and enlargement of left axillary lymph nodes. Modified radical mastectomy (Bt+Ax [level I]) was performed for this condition 3 years ago. Papillotubular-type invasive ductal carcinoma (INF β, ly3, v0, g+, f+, s+, nuclear grade 3 [atypia 3+mitosis 3]) was diagnosed histopathologically. Lymph node metastases were also detected. As histopathological examination of the bone metastatic lesion showed no progression, administration of lapatinib and capecitabine was initiated. After 15 cycles of treatment, enlarged right axillary lymph nodes were observed and local excision was performed. Histopathological examination revealed recurrence of the breast cancer. The patient was diagnosed as having grade 3( atypia 3, mitosis 2

  17. Factors affecting intrapatient liver and mediastinal blood pool {sup 18}F-FDG standardized uptake value changes during ABVD chemotherapy in Hodgkin's lymphoma

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    Chiaravalloti, Agostino; Danieli, Roberta; Abbatiello, Paolo; Di Pietro, Barbara; Travascio, Laura; Cantonetti, Maria; Guazzaroni, Manlio; Orlacchio, Antonio; Simonetti, Giovanni [University Tor Vergata, Department of Biomedicine and Prevention, Rome (Italy); Schillaci, Orazio [University Tor Vergata, Department of Biomedicine and Prevention, Rome (Italy); IRCCS Neuromed, Pozzilli (Italy)

    2014-06-15

    The aim of our study was to assess the intrapatient variability of 2-deoxy-2-({sup 18}F)-fluoro-D-glucose ({sup 18}F-FDG) uptake in the liver and in the mediastinum among patients with Hodgkin's lymphoma (HL) treated with doxorubicin (Adriamycin), bleomycin, vinblastine and dacarbazine (ABVD) chemotherapy (CHT). The study included 68 patients (30 men, 38 women; mean age 32 ± 11 years) with biopsy-proven HL. According to Ann Arbor criteria, 6 were stage I, 34 were stage II, 12 were stage 3 and 16 were stage 4. All of them underwent a baseline (PET0) and an interim (PET2) {sup 18}F-FDG whole-body positron emission tomography (PET)/CT. All patients were treated after PET0 with two ABVD cycles for 2 months that ended 15 ± 5 days prior to the PET2 examination. All patients were further evaluated 15 ± 6 days after four additional ABVD cycles (PET6). None of the patients presented a serum glucose level higher than 107 mg/dl. The mean and maximum standardized uptake values (SUV) of the liver and mediastinum were calculated using the same standard protocol for PET0, PET2 and PET6, respectively. Data were examined by means of the Wilcoxon matched pairs test and linear regression analysis. The main results of our study were an increased liver SUV{sub mean} in PET2 (1.76 ± 0.35) as compared with that of PET0 (1.57 ± 0.31; p < 0.0001) and PET6 (1.69 ± 0.28; p = 0.0407). The same results were obtained when considering liver SUV{sub max} in PET2 (3.13 ± 0.67) as compared with that of PET0 (2.82 ± 0.64; p < 0.0001) and PET6 (2.96 ± 0.52; p = 0.0105). No significant differences were obtained when comparing mediastinum SUV{sub mean} and SUV{sub max} in PET0, PET2 and PET6 (p > 0.05). Another finding is a relationship in PET0 between liver SUV{sub mean} and SUV{sub max} with the stage, which was lower in those patients with advanced disease (r{sup 2} = 0.1456 and p = 0.0013 for SUV{sub mean} and r{sup 2} = 0.1277 and p = 0.0028 for SUV{sub max}). The results of our

  18. Results of RS-99 protocol for childhood solid tumors.

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    Cai, Jiao-Yang; Tang, Jing-Yan; Pan, Ci; Xu, Min; Xue, Hui-Liang; Zhou, Min; Dong, Lu; Ye, Qi-Dong; Jiang, Hua; Shen, Shu-Hong; Chen, Jing

    2010-02-01

    Little was known about the therapeutic result of rhabdomyosarcomas (RMSs) and other malignant tumors until the end of the last century in China. Very few prospective clinical research results have been reported. We designed a RS-99 protocol under close cooperation of a multidisciplinary team including surgeons, radiologists, pathologists, and pediatric oncologists at Shanghai Children's Medical Center. This study aimed to improve the prognosis of childhood solid tumors and analyze the results of different tumors with the same protocol, including RMSs, the Ewing sarcoma family of tumors (ESFTs), and ex-cranial germ cell tumors (GCTs). Sixty-six patients with malignant solid tumors [RMS (n=30), GCT (n=22), and ESFT (n=14)] were enrolled on the RS-99 protocol from October 1998 to October 2006. They were 34 girls and 32 boys aged 9 to 194 months. The protocol involved surgery, radiotherapy and chemotherapy which included VCP (vincristine, cisdiaminedichloroplatinum, and cyclophosphamide) and IEV (etoposide, vincristine and ifosfamide) for the low-risk group, AVCP (adriamycin, vincristine, cisdiaminedichloroplatinum, and cyclophosphamide) and IEV for the intermediate-risk group and high-risk group. Peripheral blood stem cell transplantation was suggested for the high-risk group. Radiotherapy was only given for RMS and ESFT. Differences in survival between the groups were determined by comparison of entire survival curves and tested by the Kaplan-Meier method and the log-rank tests. The 5-year event-free survival (EFS) for the whole group (RMS, ESFT and GCT) was 60%. The 5-year EFS for children with RMS was 35% (95% CI 16-54), GCT was 79% (95% CI 70-88) and ESFT was 72% (95% CI 58-86). The 5-year EFS showed that the patients with RMS in the retroperitoneum-pelvis did not have a better result than those with tumors in other sites (P=0.604). The histological classification of RMS exerted prognostic influence on the estimated 5-year EFS (P=0.04). Tumor stage and risk group

  19. p-TSA-promoted syntheses of 5H-benzo[h]thiazolo[2,3-b]quinazoline and indeno[1,2-d]thiazolo[3,2-a]pyrimidine analogs: molecular modeling and in vitro antitumor activity against hepatocellular carcinoma

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    Keshari AK

    2017-05-01

    Full Text Available Amit K Keshari,1 Ashok K Singh,1 Vinit Raj,1 Amit Rai,1 Prakruti Trivedi,2 Balaram Ghosh,2 Umesh Kumar,3 Atul Rawat,3 Dinesh Kumar,3 Sudipta Saha1 1Department of Pharmaceutical Sciences, Babasaheb Bhimrao Ambedkar University, Vidya Vihar, Raebareli Road, Lucknow, Uttar Pradesh, 2Department of Pharmacy, Birla Institute of Technology & Science Pilani, Hyderabad Campus, Hyderabad, Telangana State, 3Centre of Biomedical Research (CBMR, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow, Uttar Pradesh, India Abstract: In our efforts to address the rising incidence of hepatocellular carcinoma (HCC, we have made a commitment to the synthesis of novel molecules to combat Hep-G2 cells. A facile and highly efficient one-pot, multicomponent reaction has been successfully devised utilizing a p-toluenesulfonic acid (p-TSA-catalyzed domino Knoevenagel/Michael/intramolecular cyclization approach for the synthesis of novel 5H-benzo[h]thiazolo[2,3-b]quinazoline and indeno[1,2-d]thiazolo[3,2-a]pyrimidine analogs bearing a bridgehead nitrogen atom. This domino protocol constructed one new ring by the concomitant formation of multiple bonds (C–C, C–N, and C=N involving multiple steps without the use of any metal catalysts in one-pot, with all reactants efficiently exploited. All the newly synthesized compounds were authenticated by means of Fourier transform infrared spectroscopy, liquid chromatography–mass spectrometry, proton nuclear magnetic resonance spectroscopy, and carbon-13 nuclear magnetic resonance spectroscopy, together with elemental analysis, and their antitumor activity was evaluated in vitro on a Hep-G2 human cancer cell line by sulforhodamine B assay. Computational molecular modeling studies were carried out on cancer-related targets, including interleukin-2, interleukin-6, Caspase-3, and Caspase-8. Two compounds (4A and 6A showed growth inhibitory activity comparable to the positive control Adriamycin

  20. Role of Peg10 in FAK-mediated CAM-DR in hepatocellular carcinoma

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    ZHANG Hai

    2015-02-01

    Full Text Available ObjectiveTo preliminarily investigate the relationship of Peg10 with focal adhesion kinase (FAK-mediated cell adhesion-mediated drug resistance (CAM-DR in hepatocellular carcinoma (HCC, and to explore the underlying molecular mechanism. MethodsThe effects of 5-fluorouracil (5-Fu and adriamycin (ADR on the proliferation of LO2 cells, ADR-resistant human HCC cells BEL-7404/ADR (7404/ADR, and Peg10-silenced cells siRNA-BEL-7404/ADR (siRNA-7404/ADR were examined by MTT assay. To build a tumor-bearing nude mouse model, 48 rats were randomly divided into six groups (n=8 each: groups A, C, and D were injected with 7404/ADR cells; groups B, E, and F were injected with siRNA-7404/ADR cells. For experimental treatments, groups A and B revived saline by intravenous injection through the tail vein; groups C and E were given 5-Fu; groups D and F received ADR by intravenous injection through the tail vein; tumor mass volume was measured after injection. Peg10 mRNA expression was assayed by RT-PCR, and PEG10, p-FAK, p-JNK, p-ERK, and p-P38 protein expression was assayed by Western blotting. ResultsThe 24-h IC50 values of ADR and 5-Fu on SiRNA-7404/ADR were both significantly reduced compared with those on 7404/ADR (t=7.641 and 7.560, respectively; both P<0.01. Significantly smaller tumor mass volume was observed in groups B, C, and D than in group A (P<0.05, and in groups E and F than in group B (P<0.01. Additionally, tumor mass volume was significantly different between groups E and C as well as between groups F and D (P<0.05. PEG10 mRNA was rarely expressed in groups B, E, and F. Compared with that in group A, PEG10 mRNA expression in groups C and D was relatively reduced. PEG10 protein was rarely expressed in group B and its expression level significantly differed from that in group A (P<0.01. Additionally, there were statistically significant differences in p-FAK, p-JNK, p-ERK, and p38MAPK protein expression between groups B and A (P<0.05. In

  1. A multivariate approach to the association pattern of reciprocal translocations induced by chemicals and ionizing radiation in mouse germ cells

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    J.C. De Luca

    2000-09-01

    Full Text Available The degree of similarity between chemical and physical agents in their capacity to induce reciprocal translocations was analyzed by means of multivariate analysis techniques. The effect of three different doses of gamma rays, four doses of X-rays and different doses of adriamycin, mitomycin C, thio-tepa and bleomycin was analyzed. Data were arranged in a basic matrix by two methods: cluster analysis and ordination. Two main groups were found, one including doses of 9 and 10 Gy and the other including the remaining lower doses of ionizing radiation and the other chemicals. Various subgroups were found within the second group. Accordingly, using presence/absence data there was not a specific pattern of chromosomal damage induction for physical and chemical agents. The increase in the frequencies of reciprocal translocation observed with 9 and 10 Gy was due to an increase in the kind of multivalent configurations. This variability could be dose dependent. Likewise, the similarity observed in the second group between the chemicals and the lower doses of ionizing radiation could also be dose dependent.O grau de similaridade entre agentes químicos e físicos quanto a sua capacidade de induzir translocações recíprocas foi analisado por meio de técnicas de análise multivariada. Analisou-se o efeito de três diferentes doses de raios gama, quatro doses de raios-X e diferentes doses de adriamicina, mitomicina C, tio-tepa e bleomicina. Os dados foram arranjados em uma matriz básica por 2 métodos: análise de cluster e ordenação. Dois grupos principais foram encontrados, um incluindo doses de 9 e 10 Gy e o outro incluindo as outras doses de radiação ionizante e as substâncias químicas. Vários subgrupos foram encontrados dentro do segundo grupo. Usando dados de presença/ausência, não se encontrou um padrão específico de indução de danos cromossômicos para os agentes físicos e químicos. O aumento na freqüência de translocação rec

  2. The effect of doxorubicin and retinoids on proliferation, necrosis and apoptosis in MCF-7 breast cancer cells.

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    Tomasz Anchim

    2005-02-01

    Full Text Available Doxorubicin (Adriamycin is the most active drug in the treatment of breast cancer. The aim of this study was to investigate the interaction of doxorubicin and retinoids in the inhibition of proliferation of hormone sensitive (ER+ human breast cancer cell line MCF-7 and to find out whether this combination can result in the enhancement of its therapeutic effect. As a comparison we also used estradiol and tamoxifen. We also made an attempt to elucidate the effect of these compounds on the stimulation of the apoptotic pathway in breast cancer cells. Cell proliferation in a 24-hour culture was assessed by [3H] thymidine incorporation into cancer cells and by immunocytochemical analysis of cellular cycle-related PCNA and Ki-67 antigens expression, after the incubation of the cell culture with 10, 20 and 50 nM doxorubicin (DOX, 2 nM estradiol (E2, 10 microM tamoxifen (TAM and 1 nM, 0.01, 0.1, 1 and 10 microM of all-trans retinoid acid (ATRA. The assessment of cell viability and analysis of apoptotic and necrotic cells were performed after the 72-hour incubation of the culture with the examined substances and following apoptosis induction using acridine orange and ethidine bromide. Of the doxorubicin concentrations used in the study, 20 nM inhibited thymidine incorporation to 84.83 +/- 10.00% (control=100%. In the same culture conditions, 2 nM E2 stimulated cancer cells to 157.09 +/- 8.84%. Concentrations of 10 microM TAM and 10 microM ATRA inhibited the proliferation to 63.16 +/- 7.85% and 52.19 +/- 3.21%, respectively. A statistically significant reduction of these values was observed when 20 nM DOX was added to medium with E2 - 39.24 +/- 7.6%, TAM - 48.34 +/- 2.05% and ATRA - 21.98 +/- 1.69%, respectively; the percentage of PCNA- and Ki-67-positive cells was also reduced. Despite high antiproliferative efficacy of 20 nM DOX and 10 microM ATRA combination, the percentage of apoptotic cells was only 25 +/- 0.81%, being similar to that obtained in the

  3. Aparición de episodios de neutropenia febril tras la quimioterapia citostática en el paciente oncológico Appearance of febrile neutropenia episodes after cytostatic therapy on Oncology patients

    Directory of Open Access Journals (Sweden)

    Leonardo Lami Casaus

    2009-12-01

    the presence of other factors that may to increase the risk to these reactions. A total of 42 patients were studied admitted with febrile neutropenia after above therapy from February to August, 2007. Biomedical variables from included patient group were achieved and the previously applied cytostatic therapy. The prevalent age-group was those patients aged over 50 and predominance of male sex and advanced stages with associated affections. The more frequent tumor locations were in breast, lung, and non-Hodgkin lymphoma. The cytostatic agent more used in cases of febrile neutropenia was Adriamycin (71.4 % followed by Cyclophosphamide (52.4 %. The factors more associated with febrile neutropenia appearance were: Anthracycline chemotherapy, age over 50, advanced stages, and presence of associated diseases.

  4. Atrial Function in Patients with Breast Cancer After Treatment with Anthracyclines.

    Science.gov (United States)

    Yaylali, Yalin Tolga; Saricopur, Ahmet; Yurtdas, Mustafa; Senol, Hande; Gokoz-Dogu, Gamze

    2016-11-01

    Atrial electromechanical delay (EMD) is used to predict atrial fibrillation, measured by echocardiography. The aim of this study was to assess atrial EMD and mechanical function after anthracycline-containing chemotherapy. Fifty-three patients with breast cancer (48 ± 8 years old) who received 240 mg/m2of Adriamycin, 2400 mg/m2 of cyclophosphamide, and 960 mg/m2 of paclitaxel were included in this retrospective study, as were 42 healthy subjects (47 ± 9 years old). Echocardiographic measurements were performed 11 ± 7 months (median 9 months) after treatment with anthracyclines. Left intra-atrial EMD (11.4 ± 6.0 vs. 8.1 ± 4.9, p=0.008) and inter-atrial EMD (19.7 ± 7.4 vs. 14.7 ± 6.5, p=0.001) were prolonged; LA passive emptying volume and fraction were decreased (p=0.0001 and p=0.0001); LA active emptying volume and fraction were increased (p=0.0001 and p=0.0001); Mitral A velocity (0.8 ± 0.2 vs. 0.6 ± 0.2, p=0.0001) and mitral E-wave deceleration time (201.2 ± 35.6 vs. 163.7 ± 21.8, p=0.0001) were increased; Mitral E/A ratio (1.0 ± 0.3 vs. 1.3 ± 0.3, p=0.0001) and mitral Em (0.09 ± 0.03 vs. 0.11 ± 0.03, p=0.001) were decreased; Mitral Am (0.11 ± 0.02 vs. 0.09 ± 0.02, p=0.0001) and mitral E/Em ratio (8.8 ± 3.2 vs. 7.6 ± 2.6, p=0.017) were increased in the patients. In patients with breast cancer after anthracycline therapy: Left intra-atrial, inter-atrial electromechanical intervals were prolonged. Diastolic function was impaired. Impaired left ventricular relaxation and left atrial electrical conduction could be contributing to the development of atrial arrhythmias. Atraso eletromecânico atrial (AEA) é utilizado para prever fibrilação atrial, medido pela ecocardiografia. O propósito deste estudo era verificar o AEA e a função mecânica após quimioterapia com antraciclinas. Cinquenta e três pacientes com câncer de mama (48 ± 8 anos) que receberam 240 mg/m2 de adriamicina, 2400 mg/m2 de ciclofosfamida, e 960 mg/m2 de paclitaxel foram