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Sample records for aldehyde impairs melanoma

  1. Simvastatin impairs murine melanoma growth

    Directory of Open Access Journals (Sweden)

    Barros Francisco E

    2010-12-01

    Full Text Available Abstract Background Statins induces cell cycle arrest, apoptosis, reduction of angiogenic factors, inhibition of the endothelial growth factor, impairing tissue adhesion and attenuation of the resistance mechanisms. The aim of this study was evaluate the anti-tumoral activity of simvastatin in a B16F10 melanoma-mouse model. Methods Melanoma cells were treated with different concentrations of simvastatin and assessed by viability methods. Melanoma cells (5 × 104 were implanted in two month old C57Bl6/J mice. Around 7 days after cells injection, the oral treatments were started with simvastatin (5 mg/kg/day, p.o.. Tumor size, hematological and biochemical analyses were evaluated. Results Simvastatin at a concentration of 0.8 μM, 1.2 μM and 1.6 μM had toxic effect. Concentration of 1.6 μM induced a massive death in the first 24 h of incubation. Simvastatin at 0.8 μM induces early cell cycle arrest in G0/G1, followed by increase of hypodiploidy. Tumor size were evaluated and the difference of treated group and control, after ten days, demonstrates that simvastatin inhibited the tumor expansion in 68%. Conclusion Simvastatin at 1.6 μM, presented cytototoxicity after 72 h of treatment, with an intense death. In vivo, simvastatin being potentially useful as an antiproliferative drug, with an impairment of growth after ten days.

  2. Does acute exposure to aldehydes impair pulmonary function and structure?

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    Abreu, Mariana de; Neto, Alcendino Cândido; Carvalho, Giovanna; Casquillo, Natalia Vasconcelos; Carvalho, Niedja; Okuro, Renata; Ribeiro, Gabriel C Motta; Machado, Mariana; Cardozo, Aléxia; Silva, Aline Santos E; Barboza, Thiago; Vasconcellos, Luiz Ricardo; Rodrigues, Danielle Araujo; Camilo, Luciana; Carneiro, Leticia de A M; Jandre, Frederico; Pino, Alexandre V; Giannella-Neto, Antonio; Zin, Walter A; Corrêa, Leonardo Holanda Travassos; Souza, Marcio Nogueira de; Carvalho, Alysson R

    2016-07-15

    Mixtures of anhydrous ethyl alcohol and gasoline substituted for pure gasoline as a fuel in many Brazilian vehicles. Consequently, the concentrations of volatile organic compounds (VOCs) such as ketones, other organic compounds, and particularly aldehydes increased in many Brazilian cities. The current study aims to investigate whether formaldehyde, acetaldehyde, or mixtures of both impair lung function, morphology, inflammatory and redox responses at environmentally relevant concentrations. For such purpose, C57BL/6 mice were exposed to either medical compressed air or to 4 different mixtures of formaldehyde and acetaldehyde. Eight hours later animals were anesthetized, paralyzed and lung mechanics and morphology, inflammatory cells and IL-1β, KC, TNF-α, IL-6, CCL2, MCP-1 contents, superoxide dismutase and catalalase activities were determined. The extra pulmonary respiratory tract was also analyzed. No differences could be detected between any exposed and control groups. In conclusion, no morpho-functional alterations were detected in exposed mice in relation to the control group.

  3. Cumulative life course impairment in melanoma and nonmelanoma skin cancer.

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    Piaserico, Stefano

    2013-01-01

    Patients with skin cancer remain at risk for disease progression or relapse for many years. Therefore, skin cancer may be considered a chronic, life-threatening disease. It could impact on patients lifestyles and social and professional activities. Although no direct study of cumulative life course impairment (CLCI) in skin cancer patients has been carried out, a few studies suggest that skin cancer may strongly impair quality of life and eventually determine a significant CLCI (melanoma more than nonmelanoma skin cancer). Obviously, the life course of patients with melanoma at an advanced stage of the disease may change considerably. A number of cancer-associated problems may determine a CLCI, including familial or professional changes and a reduction of life expectancy may eventually lead to social withdrawal and depressive disorders. Even patients with a low stage disease may experience an important impairment of quality of life and in some cases a CLCI. Some skin cancer patients may have physical and psychological after effects from their cancer surgery. Several patients complain about lymphedema, discomfort experienced from wearing surgical stockings, and diminished range of physical motion postsurgery. A few are concerned about their body image due to surgical scars, and they may consider changing their job position because of the supposed negative impact of scars in visible sites on their ability to perform their job. Some female melanoma survivors may have a reduced desire of having children in the future.

  4. Melanoma

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    Melanoma is the most serious type of skin cancer. Often the first sign of melanoma is a change in the size, shape, color, or feel of a mole. Most melanomas have a black or black-blue area. Melanoma ...

  5. Impaired light detection of the circadian clock in a zebrafish melanoma model.

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    Hamilton, Noémie; Diaz-de-Cerio, Natalia; Whitmore, David

    2015-01-01

    The circadian clock controls the timing of the cell cycle in healthy tissues and clock disruption is known to increase tumourigenesis. Melanoma is one of the most rapidly increasing forms of cancer and the precise molecular circadian changes that occur in a melanoma tumor are unknown. Using a melanoma zebrafish model, we have explored the molecular changes that occur to the circadian clock within tumors. We have found disruptions in melanoma clock gene expression due to a major impairment to the light input pathway, with a parallel loss of light-dependent activation of DNA repair genes. Furthermore, the timing of mitosis in tumors is perturbed, as well as the regulation of certain key cell cycle regulators, such that cells divide arhythmically. The inability to co-ordinate DNA damage repair and cell division is likely to promote further tumourigenesis and accelerate melanoma development.

  6. Melanoma

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    ... from generations ago. Back in your parents' and grandparents' day, most people (including doctors) thought it was safe and even ... it again somewhere else) Although it's less likely, people can still get melanoma even if they're dark skinned, young, and have no family history. Even for them, ...

  7. Syngeneic B16F10 Melanoma Causes Cachexia and Impaired Skeletal Muscle Strength and Locomotor Activity in Mice

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    Fabrício A. Voltarelli

    2017-09-01

    Full Text Available Muscle wasting has been emerging as one of the principal components of cancer cachexia, leading to progressive impairment of work capacity. Despite early stages melanomas rarely promotes weight loss, the appearance of metastatic and/or solid tumor melanoma can leads to cachexia development. Here, we investigated the B16F10 tumor-induced cachexia and its contribution to muscle strength and locomotor-like activity impairment. C57BL/6 mice were subcutaneously injected with 5 × 104 B16F10 melanoma cells or PBS as a Sham negative control. Tumor growth was monitored during a period of 28 days. Compared to Sham mice, tumor group depicts a loss of skeletal muscle, as well as significantly reduced muscle grip strength and epididymal fat mass. This data are in agreement with mild to severe catabolic host response promoted by elevated serum tumor necrosis factor-alpha (TNF-α, interleukin-6 (IL-6 and lactate dehydrogenase (LDH activity. Tumor implantation has also compromised general locomotor activity and decreased exploratory behavior. Likewise, muscle loss, and elevated inflammatory interleukin were associated to muscle strength loss and locomotor activity impairment. In conclusion, our data demonstrated that subcutaneous B16F10 melanoma tumor-driven catabolic state in response to a pro-inflammatory environment that is associated with impaired skeletal muscle strength and decreased locomotor activity in tumor-bearing mice.

  8. Inhibition of aquaporin-1 dependent angiogenesis impairs tumour growth in a mouse model of melanoma.

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    Nicchia, Grazia P; Stigliano, Cinzia; Sparaneo, Angelo; Rossi, Andrea; Frigeri, Antonio; Svelto, Maria

    2013-05-01

    Prohibiting angiogenesis is an important therapeutic approach for fighting cancer and other angiogenic related diseases. Research focused on proteins that regulate abnormal angiogenesis has attracted intense interest in both academia and industry. Such proteins are able to target several angiogenic factors concurrently, thereby increasing the possibility of therapeutic success. Aquaporin-1 (AQP1) is a water channel membrane protein that promotes tumour angiogenesis by allowing faster endothelial cell migration. In this study we test the hypothesis that AQP1 inhibition impairs tumour growth in a mouse model of melanoma. After validating the inhibitor efficacy of two different AQP1 specific siRNAs in cell cultures, RNA interference experiments were performed by intratumoural injections of AQP1 siRNAs in mice. After 6 days of treatment, AQP1 siRNA treated tumours showed a 75 % reduction in volume when compared to controls. AQP1 protein level, in AQP1 knockdown tumours, was around 75 % that of the controls and was associated with a significant 40 % reduced expression of the endothelial marker, Factor VIII. Immunofluorescence analysis of AQP1 siRNA treated tumours showed a significantly lower microvessel density. Time course experiments demonstrated that repeated injections of AQP1 siRNA over time are effective in sustaining the inhibition of tumour growth. Finally, we have confirmed the role of AQP1 in sustaining an active endothelium during angiogenesis and we have shown that AQP1 reduction causes an increase in VEGF levels. In conclusion, this study validates AQP1 as a pro-angiogenic protein, relevant for the therapy of cancer and other angiogenic-related diseases such as psoriasis, endometriosis, arthritis and atherosclerosis.

  9. Targeting BMK1 Impairs the Drug Resistance to Combined Inhibition of BRAF and MEK1/2 in Melanoma

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    Song, Chengli; Wang, Lina; Xu, Qiang; Wang, Kai; Xie, Dan; Yu, Zhe; Jiang, Kui; Liao, Lujian; Yates, John R.; Lee, Jiing-Dwan; Yang, Qingkai

    2017-01-01

    Combined inhibition of BRAF and MEK1/2 (CIBM) improves therapeutic efficacy of BRAF-mutant melanoma. However, drug resistance to CIBM is inevitable and the drug resistance mechanisms still remain to be elucidated. Here, we show that BMK1 pathway contributes to the drug resistance to CIBM. Considering that ERK1/2 pathway regulates cellular processes by phosphorylating, we first performed a SILAC phosphoproteomic profiling of CIBM. Phosphorylation of 239 proteins was identified to be downregulated, while phosphorylation of 47 proteins was upregulated. Following siRNA screening of 47 upregulated proteins indicated that the knockdown of BMK1 showed the most significant ability to inhibit the proliferation of CIBM resistant cells. It was found that phosphorylation of BMK1 was enhanced in resistant cells, which suggested an association of BMK1 with drug resistance. Further study indicated that phospho-activation of BMK1 by MEK5D enhanced the resistance to CIBM. Conversely, inhibition of BMK1 by shRNAi or BMK1 inhibitor (XMD8-92) impaired not only the acquirement of resistance to CIBM, but also the proliferation of CIBM resistant cells. Further kinome-scale siRNA screening demonstrated that SRC\\MEK5 cascade promotes the phospho-activation of BMK1 in response to CIBM. Our study not only provides a global phosphoproteomic view of CIBM in melanoma, but also demonstrates that inhibition of BMK1 has therapeutic potential for the treatment of melanoma. PMID:28387310

  10. Ocular Melanoma

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    ... Español Eye Health / Eye Health A-Z Ocular Melanoma Sections What is Ocular Melanoma? Ocular Melanoma Causes ... Melanoma Diagnosis Ocular Melanoma Treatment What is Ocular Melanoma? Leer en Español: ¿Qué Es el Melanoma Ocular? ...

  11. Aldehydic acids in frying oils: formation, toxicological significance and analysis

    OpenAIRE

    Kamal-Eldin, Afaf; Appelqvist, Lars-Åke

    1996-01-01

    Aldehydic acids are generated in oxidized lipids as a result of decomposition of hydroperoxides by (β-scission reactions. Aldehydes are known to interact with proteins and DNA and to impair enzymatic functions. Aldehydic esters from oxidized lipids were reabsorbed to a significant extent in rats. This paper reviews the mechanism of formation of esterified aldehydic acids in frying oils and their physiological/toxicological effects. The paper also gives an overview of relevant basic analytical...

  12. Cryptotanshinone induces melanoma cancer cells apoptosis via ROS-mitochondrial apoptotic pathway and impairs cell migration and invasion.

    Science.gov (United States)

    Ye, Tinghong; Zhu, Shirui; Zhu, Yongxia; Feng, Qiang; He, Bing; Xiong, Yiong; Zhao, Lifeng; Zhang, Yiwen; Yu, Luoting; Yang, Li

    2016-08-01

    Melanoma is the most serious type of skin cancer because it is highly frequency of drug resistance and can spread earlier and more quickly than other skin cancers. The objective of this research was to investigate the anticancer effects of cryptotanshinone on human melanoma cells in vitro, and explored its mechanisms of action. Our results have shown that cryptotanshinone could inhibit cell proliferation in human melanoma cell lines A2058, A375, and A875 in a dose- and time-dependent manner. In addition, flow cytometry assay showed that cryptotanshinone inhibited the proliferation of human melanoma cell line A375 by blocking cell cycle progression in G2/M phase and inducing apoptosis in a concentration-dependent manner. Moreover, western blot analysis indicated that the occurrence of its apoptosis was associated with upregulation of cleaved caspases-3 and pro-apoptotic protein Bax while downregulation of anti-apoptotic protein Bcl-2. Meanwhile, cryptotanshinone could decrease the levels of reactive oxygen species (ROS). Furthermore, cryptotanshinone also blocked A375 cell migration and invasion in vitro which was associated with the downregulation with MMP-9. Taken together, these results suggested that cryptotanshinone might be a potential drug in human melanoma treatment by inhibiting proliferation, inducing apoptosis via ROS-mitochondrial apoptotic pathway and blocking cell migration and invasion.

  13. Disrupted lymph node and splenic stroma in mice with induced inflammatory melanomas is associated with impaired recruitment of T and dendritic cells.

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    Saïdi M Soudja

    Full Text Available Migration of dendritic cells (DC from the tumor environment to the T cell cortex in tumor-draining lymph nodes (TDLN is essential for priming naïve T lymphocytes (TL to tumor antigen (Ag. We used a mouse model of induced melanoma in which similar oncogenic events generate two phenotypically distinct melanomas to study the influence of tumor-associated inflammation on secondary lymphoid organ (SLO organization. One tumor promotes inflammatory cytokines, leading to mobilization of immature myeloid cells (iMC to the tumor and SLO; the other does not. We report that inflammatory tumors induced alterations of the stromal cell network of SLO, profoundly altering the distribution of TL and the capacity of skin-derived DC and TL to migrate or home to TDLN. These defects, which did not require tumor invasion, correlated with loss of fibroblastic reticular cells in T cell zones and in impaired production of CCL21. Infiltrating iMC accumulated in the TDLN medulla and the splenic red pulp. We propose that impaired function of the stromal cell network during chronic inflammation induced by some tumors renders spleens non-receptive to TL and TDLN non-receptive to TL and migratory DC, while the entry of iMC into these perturbed SLO is enhanced. This could constitute a mechanism by which inflammatory tumors escape immune control. If our results apply to inflammatory tumors in general, the demonstration that SLO are poorly receptive to CCR7-dependent migration of skin-derived DC and naïve TL may constitute an obstacle for proposed vaccination or adoptive TL therapies of their hosts.

  14. Melanoma genetics

    DEFF Research Database (Denmark)

    Read, Jazlyn; Wadt, Karin A W; Hayward, Nicholas K

    2016-01-01

    Approximately 10% of melanoma cases report a relative affected with melanoma, and a positive family history is associated with an increased risk of developing melanoma. Although the majority of genetic alterations associated with melanoma development are somatic, the underlying presence...... of heritable melanoma risk genes is an important component of disease occurrence. Susceptibility for some families is due to mutation in one of the known high penetrance melanoma predisposition genes: CDKN2A, CDK4, BAP1, POT1, ACD, TERF2IP and TERT. However, despite such mutations being implicated...... in a combined total of approximately 50% of familial melanoma cases, the underlying genetic basis is unexplained for the remainder of high-density melanoma families. Aside from the possibility of extremely rare mutations in a few additional high penetrance genes yet to be discovered, this suggests a likely...

  15. Genetics of Melanoma

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    Janet eWangari-Talbot

    2013-01-01

    Full Text Available Genomic variation is a trend observed in various human diseases including cancer. Genetic studies have set out to understand how and why these variations result in cancer, why some populations are predisposed to the disease, and also how genetics affect drug responses. The melanoma incidence has been increasing at an alarming rate worldwide. The burden posed by melanoma has made it a necessity to understand the fundamental signaling pathways involved in this deadly disease. Signaling cascades such as MAPK and PI3K/AKT have been shown to be crucial in the regulation of processes that are commonly dysregulated during cancer development such as aberrant proliferation, loss of cell cycle control, impaired apoptosis and altered drug metabolism. Understanding how these and other oncogenic pathways are regulated has been integral in our challenge to develop potent anti-melanoma drugs. With advances in technology and especially in next generation sequencing, we have been able to explore melanoma genomes and exomes leading to the identification of previously unknown genes with functions in melanomagenesis such as GRIN2A and PREX2. The therapeutic potential of these novel candidate genes is actively being pursued with some presenting as druggable targets while others serve as indicators of therapeutic responses. In addition, the analysis of the mutational signatures of melanoma tumors continues to cement the causative role of UV exposure in melanoma pathogenesis. It has become distinctly clear that melanomas from sun exposed skin areas have distinct mutational signatures including C to T transitions indicative of UV-induced damage. It is thus necessary to continue spreading awareness on how to decrease the risk factors of developing the disease while at the same time working for a cure. Given the large amount of information gained from these sequencing studies, it is likely that in the future, treatment of melanoma will follow a highly personalized route

  16. Pediatric melanoma.

    Science.gov (United States)

    Tracy, Elisabeth T; Aldrink, Jennifer H

    2016-10-01

    Childhood melanoma is a rare pediatric malignancy, with fewer than 500 new diagnoses annually. The incidence is increasing, particularly in the adolescent population. This review highlights the epidemiology, clinical presentation, and histopathologic challenges of pediatric melanoma. Surgical resection remains the cornerstone for localized and regionally advanced disease. Adjuvant therapies, including current options and potential novel therapeutics for this unique population will be discussed. Copyright © 2016 Elsevier Inc. All rights reserved.

  17. Cutaneous melanoma.

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    Eggermont, Alexander M M; Spatz, Alan; Robert, Caroline

    2014-03-01

    In the past decade, major advances have been made in the understanding of melanoma. New predisposition genes have been reported and key somatic events, such as BRAF mutation, directly translated into therapeutic management. Surgery for localised melanoma and regional lymph node metastases is the standard of care. Sentinel-node biopsy provides precise staging, but has not been reported to affect survival. The effect of lymph-node dissection on survival is a topic of investigation. Two distinct approaches have emerged to try to extend survival in patients with metastatic melanoma: immunomodulation with anti-CTLA4 monoclonal antibodies, and targeted therapy with BRAF inhibitors or MEK inhibitors for BRAF-mutated melanoma. The combination of BRAF inhibitors and MEK inhibitors might improve progression-free survival further and, possibly, increase overall survival. Response patterns differ substantially-anti-CTLA4 immunotherapy can induce long-term responses, but only in a few patients, whereas targeted drugs induce responses in most patients, but nearly all of them relapse because of pre-existing or acquired resistance. Thus, the long-term prognosis of metastatic melanoma remains poor. Anti-PD1 and anti-PDL1 antibodies have emerged as breakthrough drugs for melanoma that have high response rates and long durability. Biomarkers that have predictive value remain elusive in melanoma, although emerging data for adjuvant therapy indicate that interferon sensitivity is associated with ulceration of the primary melanoma. Intense investigation continues for clinical and biological markers that predict clinical benefit of immunotherapeutic drugs, such as interferon alfa or anti-CTLA4 antibodies, and the mechanisms that lead to resistance of targeted drugs.

  18. Malignant Melanoma

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    Eshini Perera

    2013-12-01

    Full Text Available Melanomas are a major cause of premature death from cancer. The gradual decrease in rates of morbidity and mortality has occurred as a result of public health campaigns and improved rates of early diagnosis. Survival of melanoma has increased to over 90%. Management of melanoma involves a number of components: excision, tumor staging, re-excision with negative margins, adjuvant therapies (chemo, radiation or surgery, treatment of stage IV disease, follow-up examination for metastasis, lifestyle modification and counseling. Sentinel lymph node status is an important prognostic factor for survival in patients with a melanoma >1 mm. However, sentinel lymph node biopsies have received partial support due to the limited data regarding the survival advantage of complete lymph node dissection when a micrometastasis is detected in the lymph nodes. Functional mutations in the mitogen-activated pathways are commonly detected in melanomas and these influence the growth control. Therapies that target these pathways are rapidly emerging, and are being shown to increase survival rates in patients. Access to these newer agents can be gained by participation in clinical trials after referral to a multidisciplinary team for staging and re-excision of the scar.

  19. What Is Melanoma Skin Cancer?

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    ... Z About Melanoma Skin Cancer What Is Melanoma Skin Cancer? Key Statistics for Melanoma Skin Cancer What’s New in Melanoma ... Policy . About Melanoma Skin Cancer What Is Melanoma Skin Cancer? Key Statistics for Melanoma Skin Cancer What’s New in Melanoma ...

  20. Surgery of Primary Melanomas

    Energy Technology Data Exchange (ETDEWEB)

    Rutkowski, Piotr, E-mail: rutkowskip@coi.waw.pl; Zdzienicki, Marcin; Nowecki, Zbigniew I. [Soft Tissue/Bone Sarcoma and Melanoma Department, M. Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw (Poland); Akkooi, Alexander C. J. van [Erasmus University Medical Center-Daniel den Hoed Cancer Center, Rotterdam (Netherlands)

    2010-05-11

    Surgery remains the mainstay of melanoma therapy, regardless of the tumor site. Only the early diagnosis combined with proper surgical therapy currently gives patients affected by this malignancy the chance for a full cure. The main goal of surgical therapy is to provide the local control of the disease and to secure long-term survival of the patient without reasonable functional and esthetic impairment. The recommended method of biopsy—excisional biopsy, as an initial diagnostic and, to some extent, therapeutic procedure—is performed under local anesthesia as an elliptical incision with visual clear margins of 1–3 mm and with some mm of subcutaneous tissue. The extent of radical excision of the primary tumor (or scar after excisional biopsy) is based on the histopathologic characteristics of the primary tumor and usually consists of 1–2 cm margins with primary closure. The philosophy behind conducted randomized clinical trials has been to find the most conservative surgical approach that is able to guarantee the same results as more demolitive treatment. This has been the background of the trials designed to define the correct margins of excision around a primary cutaneous melanoma. Much less definition can be dedicated to the surgical management of patients with non-cutaneous melanomas.

  1. [Vulvar melanoma].

    Science.gov (United States)

    Chokoeva, A; Tchernev, G; Wollina, U

    2015-01-01

    Malignant melanoma of the vulva is a rare disease with aggressive behavior and poor prognosis. It consist melanoma in females, as the ratio of its manifestation, compared with the cutaneous melanoma is 1:71. Higher risk of developing melanoma of the vulva is established in white women, as the peak of the incidence is between 60 and 70 years of age. Clinically, MM of the vulva manifests as asymptomatic pigmented, rarely a pigmented lesion, as the usual clinical form is superficial spreading MM and much less common nodular MM, which is associated with a poorer prognosis in. general. The diagnosis is confirmed by histological examination. Conduction of PCR and DNA analysis for detection of BRAF mutations, NRAS mutations and KIT amplification is also appropriate. Advanced age, black race, tumor size, tumor thickness, ulceration, presence of satellite lesions, involvement of adjacent organs (vagina, urethra), and the presence of regional or distant metastases are identified as the most important prognostic markers. Radical wide excision followed by bilateral lymphadenectomy id considered as the optimal therapeutic approach.

  2. Melanoma immunotherapy.

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    Sivendran, Shanthi; Glodny, Bradley; Pan, Michael; Merad, Miriam; Saenger, Yvonne

    2010-01-01

    Melanoma immunotherapy has been an area of intense research for decades, and this work is now yielding more tangible results for patients. Work has focused on 4 main areas: cytokine therapy, administration of immune-modulating antibodies, adoptive T-cell therapy, and vaccines. Cytokine therapy is an established treatment for advanced melanoma, and immune-modulating antibodies have recently emerged as an exciting new area of drug development with efficacy now established in a phase III trial. Adoptive T-cell therapy provides the proof of principle that T cells can attack and eliminate tumors. It has been challenging, however, to adapt this treatment for widespread use. Vaccines have generally yielded poor results, but intratumor pathogen-based strategies have shown encouraging results in recent trials, perhaps due to stronger immune stimulation. A review of the field of melanoma immunotherapy is provided here, with emphasis on those agents that have reached clinical testing. Novel strategies to induce the immune system to attack melanomas are reviewed. In the future, it is envisioned that immunotherapy will have further application in combination with cytotoxic and targeted therapies.

  3. What Does Melanoma Look Like?

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    ... Skin Cancer Skin Cancer Screening Research What Does Melanoma Look Like? Melanoma is a type of cancer ... melanoma is itchy, tender, or painful. Photos of Melanoma A large, asymmetrical melanoma with an uneven color ...

  4. Alcohol, Aldehydes, Adducts and Airways.

    Science.gov (United States)

    Sapkota, Muna; Wyatt, Todd A

    2015-11-05

    Drinking alcohol and smoking cigarettes results in the formation of reactive aldehydes in the lung, which are capable of forming adducts with several proteins and DNA. Acetaldehyde and malondialdehyde are the major aldehydes generated in high levels in the lung of subjects with alcohol use disorder who smoke cigarettes. In addition to the above aldehydes, several other aldehydes like 4-hydroxynonenal, formaldehyde and acrolein are also detected in the lung due to exposure to toxic gases, vapors and chemicals. These aldehydes react with nucleophilic targets in cells such as DNA, lipids and proteins to form both stable and unstable adducts. This adduction may disturb cellular functions as well as damage proteins, nucleic acids and lipids. Among several adducts formed in the lung, malondialdehyde DNA (MDA-DNA) adduct and hybrid malondialdehyde-acetaldehyde (MAA) protein adducts have been shown to initiate several pathological conditions in the lung. MDA-DNA adducts are pre-mutagenic in mammalian cells and induce frame shift and base-pair substitution mutations, whereas MAA protein adducts have been shown to induce inflammation and inhibit wound healing. This review provides an insight into different reactive aldehyde adducts and their role in the pathogenesis of lung disease.

  5. Nutrition and melanoma prevention.

    Science.gov (United States)

    Jensen, J Daniel; Wing, Gregory J; Dellavalle, Robert P

    2010-01-01

    Melanoma has continued to rise in incidence despite public efforts to promote sun protection behaviors. Because sunscreen use does not completely prevent skin cancer induced by ultraviolet radiation, additional chemopreventive methods for protecting against and reversing the effects of ultraviolet photodamage need evaluation. Recent years have brought increased interest in dietary factors, such as natural botanicals and vitamins, for the prevention of melanoma. This contribution provides a narrative review of the relevant, nutrition-related literature found by searching the keywords "melanoma chemoprevention," "nutrition and melanoma," "dietary botanicals and melanoma prevention," "green tea and melanoma," "vitamin D and melanoma," and "vitamin E and melanoma" in the PubMed database. Although randomized controlled trials of humans are lacking, basic science and epidemiologic studies show promising benefits of many natural products in chemoprevention for melanoma. Future studies, hopefully, will yield concrete answers and clarify the role of commonly available dietary nutrients in melanoma chemoprevention.

  6. Recombinant Interferon Alfa-2b in Treating Patients With Melanoma

    Science.gov (United States)

    2016-05-17

    Stage IA Skin Melanoma; Stage IB Skin Melanoma; Stage IIA Skin Melanoma; Stage IIB Skin Melanoma; Stage IIC Skin Melanoma; Stage IIIA Skin Melanoma; Stage IIIB Skin Melanoma; Stage IIIC Skin Melanoma; Stage IV Skin Melanoma

  7. Casticin impairs cell migration and invasion of mouse melanoma B16F10 cells via PI3K/AKT and NF-κB signaling pathways.

    Science.gov (United States)

    Shih, Yung-Luen; Chou, Hsiao-Min; Chou, Hsiu-Chen; Lu, Hsu-Feng; Chu, Yung-Lin; Shang, Hung-Sheng; Chung, Jing-Gung

    2017-09-01

    Casticin, a polymethoxyflavone, is one of the major active components obtained from Fructus viticis, which have been shown to have anticancer activities including induce cell apoptosis in human cancer cells. The aim of this study was to investigate the molecular mechanisms by which casticin inhibits cell migration and invasion of mouse melanoma B16F10 cells. Cell viability was examined by MTT assay and the results indicated that casticin decreased the total percentages of viable cells in dose-dependent manners. Casticin affected cell migration and invasion in B16F10 cells were examined by wound healing mobility assay and Boyden chamber migration and invasion assay and results indicated that casticin inhibited cell migration and invasion in dose-dependent manners. Western blotting was used to examine the protein expression of B16F10 cells after exposed to casticin and the results showed that casticin decreased the expressions of MMP-9, MMP-2, MMP-1, FAK, 14-3-3, GRB2, Akt, NF-κB p65, SOS-1, p-EGFR, p-JNK 1/2, uPA, and Rho A in B16F10 cells. Furthermore, cDNA microarray assay was used to show that casticin affected associated gene expression of cell migration and invasion and the results indicated that casticin affected some of the gene expression such as increased SCN1B (cell adhesion molecule 1) and TIMP2 (TIMP metallopeptidase inhibitor 2) and decreased NDUFS4 (NADH dehydrogenase (ubiquinone) Fe-S protein4), VEGFA (vascular endothelial growth factor A), and DDIT3 (DNA-damage-inducible transcript 3) which associated cell migration and invasion in B16F10 cells. Based on those observations, we suggest that casticin could be used as a novel anticancer metastasis of melanoma cancer in the future. © 2017 Wiley Periodicals, Inc.

  8. Aldehydic acids in frying oils: formation, toxicological significance and analysis

    Directory of Open Access Journals (Sweden)

    Kamal-Eldin, Afaf

    1996-10-01

    Full Text Available Aldehydic acids are generated in oxidized lipids as a result of decomposition of hydroperoxides by (β-scission reactions. Aldehydes are known to interact with proteins and DNA and to impair enzymatic functions. Aldehydic esters from oxidized lipids were reabsorbed to a significant extent in rats. This paper reviews the mechanism of formation of esterified aldehydic acids in frying oils and their physiological/toxicological effects. The paper also gives an overview of relevant basic analytical techniques that needs to be improved to establish reliable quantitative method (s.

    Ácidos aldehídicos son producidos en lípidos oxidados como resultado de la descomposición de hidroperóxidos por reacciones de (β-escición. Es conocido que los aldehídos interaccionan con las proteínas y el ADN y debilitan las funciones enzimáticas. Los esteres aldehídicos de lípidos oxidados fueron reabsorbidos en una cantidad significativa en ratas. Este artículo revisa los mecanismos de formación de ácidos aldehídicos esterificados en aceites de fritura y sus efectos fisiológicos/toxicológicos. El artículo también ofrece una visión de conjunto de las técnicas analíticas básicas que necesitan ser mejoradas para establecer métodos cuantitativos fiables.

  9. Malignant uveal melanoma and similar lesions studied by computed tomography

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    Mafee, M.F.; Peyman, G.A.; McKusick, M.A.

    1985-08-01

    Forty-four patients with intraocular disease were studied by computed tomography (CT); in 19 cases malignant uveal melanoma was considered the likely diagnosis. CT proved to be accurate in determining the location and size of uveal melanomas, demonstrating scleral invasion, and differentiating melanoma from choroidal detachment or angioma, toxocariasis, and senile macular degeneration. On CT, uveal melanomas appeared as hyperdense lesions with slight to moderate contrast enhancement. Tumors thinner than 2 mm could not be seen. Using dynamic CT, the authors noted moderate peak amplitude, normal or delayed tissue transit time, and persistently elevated washout phase (downslope), indicating increased permeability as the result of an impaired tumor blood barrier. Histological types of uveal melanoma could not be differentiated on the basis of circulatory patterns. Dynamic CT may be useful in distinguishing uveal melanoma from choroidal hemangioma or hematoma.

  10. Pregnancy and melanoma.

    Science.gov (United States)

    Driscoll, Marcia S; Martires, Kathryn; Bieber, Amy Kalowitz; Pomeranz, Miriam Keltz; Grant-Kels, Jane M; Stein, Jennifer A

    2016-10-01

    Malignant melanoma is the most common malignancy during pregnancy, and is diagnosed during childbearing age in approximately one-third of women diagnosed with melanoma. The impact of hormonal changes during pregnancy and from iatrogenic hormones on melanoma is controversial. Women undergo immunologic changes during pregnancy that may decrease tumor surveillance. In addition, hormone receptors are found on some melanomas. In spite of these observations, the preponderance of evidence does not support a poorer prognosis for pregnancy-associated melanomas. There is also a lack of evidence that oral contraceptives or hormone replacement therapy worsens melanoma prognosis.

  11. Melanoma - neck (image)

    Science.gov (United States)

    This melanoma on the neck is variously colored with a very darkly pigmented area found centrally. It has irregular ... be larger than 0.5 cm. Prognosis in melanoma is best defined by its depth on resection.

  12. Drugs Approved for Melanoma

    Science.gov (United States)

    ... Ask about Your Treatment Research Drugs Approved for Melanoma This page lists cancer drugs approved by the ... that are not listed here. Drugs Approved for Melanoma Aldesleukin Cobimetinib Cotellic (Cobimetinib) Dabrafenib Dacarbazine DTIC-Dome ( ...

  13. Molecular Classification of Melanoma

    Science.gov (United States)

    Tissue-based analyses of precursors, melanoma tumors and metastases within existing study populations to further understanding of the heterogeneity of melanoma and determine a predictive pattern of progression for dysplastic nevi.

  14. Pedunculated malignant melanoma

    Directory of Open Access Journals (Sweden)

    Bhat Ramesha

    1994-01-01

    Full Text Available Pedunculated malignant melanoma is a rare occurrence. A 29 year old woman presented with a pedunculated malignant melanoma on a congenital melanocytic naevus with halo. Pedunculated malignant melanoma is known to have a high incidence of metastasis. The absence of metastasis and the presence of halo, in the case presented, suggests, that the body′s immunological process may have arrested the spread of the melanoma.

  15. Are all melanomas dangerous?

    DEFF Research Database (Denmark)

    Nørgaard, Carsten; Glud, Martin; Gniadecki, Robert

    2011-01-01

    The increased incidence of cutaneous malignant melanoma, together with only minor changes in mortality, has brought into question the existence of a melanoma epidemic. The discrepancy between incidence and mortality suggests that most newly diagnosed melanomas have indolent behaviour. This review...

  16. Burden of Melanoma

    NARCIS (Netherlands)

    C. Holterhues (Cynthia)

    2011-01-01

    markdownabstract__Abstract__ Melanoma is a type of skin cancer that arises from melanocytes. More than 95% of all melanomas occur in the skin, but rarely in the pigmented cells of the eye, meninges or mucosa. This thesis will only regard the invasive cutaneous malignant melanomas.

  17. Drug effects on melanoma

    NARCIS (Netherlands)

    Koomen, Elsje Rosalie

    2010-01-01

    Cutaneous melanoma is the most aggressive form of skin cancer and its incidence among Caucasian populations has increased whereas mortality rates are stabilizing or decreasing. The total burden of melanoma is expected to be increasing. As effective treatment options for advanced melanoma are lackin

  18. Drug effects on melanoma

    NARCIS (Netherlands)

    Koomen, Elsje Rosalie

    2010-01-01

    Cutaneous melanoma is the most aggressive form of skin cancer and its incidence among Caucasian populations has increased whereas mortality rates are stabilizing or decreasing. The total burden of melanoma is expected to be increasing. As effective treatment options for advanced melanoma are

  19. Ecology of melanoma cell.

    Science.gov (United States)

    Lacina, Lukáš; Kodet, Ondřej; Dvořánková, Barbora; Szabo, Pavol; Smetana, Karel

    2017-08-29

    Melanoma represents a cancer with increasing incidence worldwide and limited curability of advanced stages of the disease. Similarly to other types of tumors, the microenvironment is an important factor that participates in the control of melanoma biological properties. This review summarizes data regarding the role of the microenvironment, namely fibroblasts, keratinocytes and infiltrating immune cells, on melanoma growth and spreading. The role of embryonic microenvironment on melanoma cell biological properties is also discussed. The potential of therapeutic targeting of the melanoma microenvironment is demonstrated.

  20. Chromate reduction by rabbit liver aldehyde oxidase

    Energy Technology Data Exchange (ETDEWEB)

    Banks, R.B.; Cooke, R.T. Jr.

    1986-05-29

    Chromate was reduced during the oxidation of 1-methylnicotinamide chlorine by partially purified rabbit liver aldehyde oxidase. In addition to l-methylnicotinamide, several other electron donor substrates for aldehyde oxidase were able to support the enzymatic chromate reduction. The reduction required the presence of both enzyme and the electron donor substrate. The rate of the chromate reduction was retarded by inhibitors or aldehyde oxidase but was not affected by substrates or inhibitors of xanthine oxidase. These results are consistent with the involvement of aldehyde oxidase in the reduction of chromate by rabbit liver cytosolic enzyme preparations.

  1. Malignant Melanoma of the Foot

    Science.gov (United States)

    ... page. Please enable Javascript in your browser. Malignant Melanoma of the Foot What Is Malignant Melanoma? Melanoma is a cancer that begins in the ... people of all age groups, even the young. Melanoma in the Foot Melanoma that occurs in the ...

  2. How Is Melanoma Skin Cancer Diagnosed?

    Science.gov (United States)

    ... Early Detection, Diagnosis, and Staging Tests for Melanoma Skin Cancer Most melanomas are brought to a doctor’s attention ... Melanoma Skin Cancer, by Stage More In Melanoma Skin Cancer About Melanoma Skin Cancer Causes, Risk Factors, and ...

  3. Gaseous aliphatic aldehydes in Chinese incense smoke

    Energy Technology Data Exchange (ETDEWEB)

    Lin, J.M.; Wang, L.H. (National Taiwan Univ., Taipei (China))

    1994-09-01

    Aliphatic aldehydes were found during the combustion of materials. Tobacco smoke contains aldehydes. Fire fighters were exposed to aldehydes when they conducted firefighting. Aldehydes in ambient air come mainly from the incomplete combustion of hydrocarbons and from photochemical reaction. Most aldehydes in ambient air are formaldehyde and acetaldehyde. Formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, and benzaldehyde were found in the atmosphere in Los Angeles. Burning Chinese incense for worshipping deities is a Chinese daily routine. It was suspected to be a factor causing nasopharynegeal cancer. Epidemiological studies correlated it with the high risk of childhood brain tumor and the high risk of childhood leukemia. Ames test identified the mutagenic effect of the smoke from burning Chinese incense. The smoke had bee proved to contain polycyclic aromatic hydrocarbons and aromatic aldehydes. Suspicion about formaldehyde and other alphatic aldehydes was evoked, when a survey of indoor air pollution was conducted in Taipei city. This study determined the presence of aliphatic aldehydes in the smoke from burning Chinese incense under a controlled atmosphere. 12 refs., 5 figs., 2 tabs.

  4. Gamma-Secretase/Notch Signalling Pathway Inhibitor RO4929097 in Treating Patients With Stage IV Melanoma

    Science.gov (United States)

    2016-05-06

    Acral Lentiginous Malignant Melanoma; Lentigo Maligna Malignant Melanoma; Nodular Malignant Melanoma; Recurrent Melanoma; Solar Radiation-related Skin Melanoma; Stage IV Melanoma; Superficial Spreading Malignant Melanoma

  5. CDC Vital Signs: Preventing Melanoma

    Science.gov (United States)

    ... MMWR Science Clips Error processing SSI file Preventing Melanoma Communities Play a Vital Role Language: English Español ( ... and use of indoor tanning by minors. Problem Melanoma is increasing. Melanoma skin cancer is common and ...

  6. [Targeted therapies for melanoma].

    Science.gov (United States)

    Leiter, U; Meier, F; Garbe, C

    2014-07-01

    Since the discovery of activating mutations in the BRAF oncogene and also stimulation of immune mediated antitumor response in melanoma, there has been remarkable progress in the development of targeted therapies for unresectable and metastatic melanoma. This article addresses the latest developments of BRAF/MEK/ERK pathway signaling. In addition, the development of drugs to attack alternative mutations in melanoma, such as NRAS and KIT is described. Strategies for the management of BRAF inhibitor resistance, such as with combination therapy, are outlined. Antitumor immune therapies with monoclonal antibodies such as ipilimumab which acts by promoting T-cell activation or antibody blockade of programmed death-1 (PD-1) led to a long term response in metastatic melanoma. Results of latest clinical studies including the toxicity profile are described. Due to selective kinase inhibitors and immune checkpoint blockade, the therapy of unresectable metastatic melanoma has greatly improved and long-term survival of patients with metastatic melanoma seems a real possibility.

  7. Decoding Melanoma Metastasis

    Energy Technology Data Exchange (ETDEWEB)

    Damsky, William E. Jr. [Department of Dermatology, Yale School of Medicine, New Haven, Connecticut (United States); Department of Pathology, University of Vermont College of Medicine, Burlington, Vermont (United States); Rosenbaum, Lara E.; Bosenberg, Marcus, E-mail: Marcus.Bosenberg@yale.edu [Department of Dermatology, Yale School of Medicine, New Haven, Connecticut (United States)

    2010-12-30

    Metastasis accounts for the vast majority of morbidity and mortality associated with melanoma. Evidence suggests melanoma has a predilection for metastasis to particular organs. Experimental analyses have begun to shed light on the mechanisms regulating melanoma metastasis and organ specificity, but these analyses are complicated by observations of metastatic dormancy and dissemination of melanocytes that are not yet fully malignant. Additionally, tumor extrinsic factors in the microenvironment, both at the site of the primary tumor and the site of metastasis, play important roles in mediating the metastatic process. As metastasis research moves forward, paradigms explaining melanoma metastasis as a step-wise process must also reflect the temporal complexity and heterogeneity in progression of this disease. Genetic drivers of melanoma as well as extrinsic regulators of disease spread, particularly those that mediate metastasis to specific organs, must also be incorporated into newer models of melanoma metastasis.

  8. The Danish Melanoma Database

    DEFF Research Database (Denmark)

    Hölmich, Lisbet Rosenkrantz; Klausen, Siri; Spaun, Eva;

    2016-01-01

    AIM OF DATABASE: The aim of the database is to monitor and improve the treatment and survival of melanoma patients. STUDY POPULATION: All Danish patients with cutaneous melanoma and in situ melanomas must be registered in the Danish Melanoma Database (DMD). In 2014, 2,525 patients with invasive...... melanoma and 780 with in situ tumors were registered. The coverage is currently 93% compared with the Danish Pathology Register. MAIN VARIABLES: The main variables include demographic, clinical, and pathological characteristics, including Breslow's tumor thickness, ± ulceration, mitoses, and tumor...... quality register. The coverage is high, and the performance in the five Danish regions is quite similar due to strong adherence to guidelines provided by the Danish Melanoma Group. The list of monitored indicators is constantly expanding, and annual quality reports are issued. Several important scientific...

  9. Genetics of familial melanoma

    DEFF Research Database (Denmark)

    Aoude, Lauren G; Wadt, Karin A W; Pritchard, Antonia L

    2015-01-01

    Twenty years ago, the first familial melanoma susceptibility gene, CDKN2A, was identified. Two years later, another high-penetrance gene, CDK4, was found to be responsible for melanoma development in some families. Progress in identifying new familial melanoma genes was subsequently slow; however......, with the advent of next-generation sequencing, a small number of new high-penetrance genes have recently been uncovered. This approach has identified the lineage-specific oncogene MITF as a susceptibility gene both in melanoma families and in the general population, as well as the discovery of telomere...... maintenance as a key pathway underlying melanoma predisposition. Given these rapid recent advances, this approach seems likely to continue to pay dividends. Here, we review the currently known familial melanoma genes, providing evidence that most additionally confer risk to other cancers, indicating...

  10. Decoding Melanoma Metastasis

    Directory of Open Access Journals (Sweden)

    Marcus Bosenberg

    2010-12-01

    Full Text Available Metastasis accounts for the vast majority of morbidity and mortality associated with melanoma. Evidence suggests melanoma has a predilection for metastasis to particular organs. Experimental analyses have begun to shed light on the mechanisms regulating melanoma metastasis and organ specificity, but these analyses are complicated by observations of metastatic dormancy and dissemination of melanocytes that are not yet fully malignant. Additionally, tumor extrinsic factors in the microenvironment, both at the site of the primary tumor and the site of metastasis, play important roles in mediating the metastatic process. As metastasis research moves forward, paradigms explaining melanoma metastasis as a step-wise process must also reflect the temporal complexity and heterogeneity in progression of this disease. Genetic drivers of melanoma as well as extrinsic regulators of disease spread, particularly those that mediate metastasis to specific organs, must also be incorporated into newer models of melanoma metastasis.

  11. The Danish Melanoma Database

    DEFF Research Database (Denmark)

    Hölmich, Lisbet Rosenkrantz; Klausen, Siri; Spaun, Eva

    2016-01-01

    AIM OF DATABASE: The aim of the database is to monitor and improve the treatment and survival of melanoma patients. STUDY POPULATION: All Danish patients with cutaneous melanoma and in situ melanomas must be registered in the Danish Melanoma Database (DMD). In 2014, 2,525 patients with invasive......, nature, and treatment hereof is registered. In case of death, the cause and date are included. Currently, all data are entered manually; however, data catchment from the existing registries is planned to be included shortly. DESCRIPTIVE DATA: The DMD is an old research database, but new as a clinical...

  12. Primary leptomeningeal melanoma.

    Science.gov (United States)

    Xie, Zhao-Yu; Hsieh, Kevin Li-Chun; Tsang, Yuk-Ming; Cheung, Wing-Keung; Hsieh, Chen-Hsi

    2014-06-01

    Primary melanoma of the central nervous system is a rare melanocytic tumor typically located in the leptomeninges. We report a 57-year-old woman with an intracranial leptomeningeal melanoma who presented with myoclonic seizures. Brain CT scan and MRI revealed a hemorrhagic intracranial tumor. The tumor was completely removed and leptomeningeal melanoma was proven pathologically. Follow-up imaging studies up to 19 months showed no recurrence of the disease. Here we present radiological, gross, and pathological images of leptomeningeal melanoma, discuss its characteristics, and review the relevant literature.

  13. Toward aldehyde and alkane production by removing aldehyde reductase activity in Escherichia coli.

    Science.gov (United States)

    Rodriguez, Gabriel M; Atsumi, Shota

    2014-09-01

    Advances in synthetic biology and metabolic engineering have enabled the construction of novel biological routes to valuable chemicals using suitable microbial hosts. Aldehydes serve as chemical feedstocks in the synthesis of rubbers, plastics, and other larger molecules. Microbial production of alkanes is dependent on the formation of a fatty aldehyde intermediate which is converted to an alkane by an aldehyde deformylating oxygenase (ADO). However, microbial hosts such as Escherichia coli are plagued by many highly active endogenous aldehyde reductases (ALRs) that convert aldehydes to alcohols, which greatly complicates strain engineering for aldehyde and alkane production. It has been shown that the endogenous ALR activity outcompetes the ADO enzyme for fatty aldehyde substrate. The large degree of ALR redundancy coupled with an incomplete database of ALRs represents a significant obstacle in engineering E. coli for either aldehyde or alkane production. In this study, we identified 44 ALR candidates encoded in the E. coli genome using bioinformatics tools, and undertook a comprehensive screening by measuring the ability of these enzymes to produce isobutanol. From the pool of 44 candidates, we found five new ALRs using this screening method (YahK, DkgA, GldA, YbbO, and YghA). Combined deletions of all 13 known ALRs resulted in a 90-99% reduction in endogenous ALR activity for a wide range of aldehyde substrates (C2-C12). Elucidation of the ALRs found in E. coli could guide one in reducing competing alcohol formation during alkane or aldehyde production.

  14. Translational research in melanoma.

    Science.gov (United States)

    Ray, Madhury; Farma, Jeffrey M; Hsu, Cary

    2013-10-01

    Recent breakthroughs in the fundamental understanding of the cellular and molecular basis of melanoma have culminated in new therapies with unquestionable efficacy. Immunotherapy and targeted therapy strategies have completely transformed the contemporary management of advanced melanoma. The translational research behind these developments is discussed, with an emphasis on immune checkpoint blockade and inhibition of the mitogen-activated protein kinase signaling pathway.

  15. Bronchial malignant melanoma.

    Science.gov (United States)

    Weshler, Z; Sulkes, A; Kopolovitch, J; Leviatan, A; Shifrin, E

    1980-01-01

    We describe a case of malignant melanoma presenting initially as an endobronchial lesion located in the left main bronchus causing total atelectasis. This resolved with radiation therapy. Widespread metastases developed shortly thereafter. The differential diagnosis of primary and metastatic bronchial malignant melanoma is discussed. Other isolated case reports are reviewed.

  16. Uveal melanoma: Estimating prognosis

    Directory of Open Access Journals (Sweden)

    Swathi Kaliki

    2015-01-01

    Full Text Available Uveal melanoma is the most common primary malignant tumor of the eye in adults, predominantly found in Caucasians. Local tumor control of uveal melanoma is excellent, yet this malignancy is associated with relatively high mortality secondary to metastasis. Various clinical, histopathological, cytogenetic features and gene expression features help in estimating the prognosis of uveal melanoma. The clinical features associated with poor prognosis in patients with uveal melanoma include older age at presentation, male gender, larger tumor basal diameter and thickness, ciliary body location, diffuse tumor configuration, association with ocular/oculodermal melanocytosis, extraocular tumor extension, and advanced tumor staging by American Joint Committee on Cancer classification. Histopathological features suggestive of poor prognosis include epithelioid cell type, high mitotic activity, higher values of mean diameter of ten largest nucleoli, higher microvascular density, extravascular matrix patterns, tumor-infiltrating lymphocytes, tumor-infiltrating macrophages, higher expression of insulin-like growth factor-1 receptor, and higher expression of human leukocyte antigen Class I and II. Monosomy 3, 1p loss, 6q loss, and 8q and those classified as Class II by gene expression are predictive of poor prognosis of uveal melanoma. In this review, we discuss the prognostic factors of uveal melanoma. A database search was performed on PubMed, using the terms "uvea," "iris," "ciliary body," "choroid," "melanoma," "uveal melanoma" and "prognosis," "metastasis," "genetic testing," "gene expression profiling." Relevant English language articles were extracted, reviewed, and referenced appropriately.

  17. Familial malignant melanoma

    Energy Technology Data Exchange (ETDEWEB)

    Kopf, A.W.; Hellman, L.J.; Rogers, G.S.; Gross, D.F.; Rigel, D.S.; Friedman, R.J.; Levenstein, M.; Brown, J.; Golomb, F.M.; Roses, D.F.; Gumport, S.L.

    1986-10-10

    Characteristics associated with familial compared with nonfamilial malignant melanoma were assessed. These data were obtained from consecutive prospectively completed questionnaires on 1169 cases of cutaneous malignant melanoma. Of these, 69 patients indicated a positive family history for this cancer. Among the various clinical and histological variables compared, those that significantly correlated with the familial occurrence of malignant melanoma include younger age at first diagnosis, smaller diameter of the lesion, lower Clark level, decreased frequency of nonmelanoma skin cancer, and reduced prevalence of noncutaneous cancer. Increased awareness of malignant melanoma among family members could account for some of these observations. Identification of the familial variety of malignant melanoma has practical implications concerning early detection and prompt intervention.

  18. Synchronous anorectal melanoma

    Institute of Scientific and Technical Information of China (English)

    Drinko Balicevic; Karla Tomic; Miroslav Bekavac-Beslin; Igor Kovacevic; August Mijic; Mladen Belicza; Bozo Kruslin

    2006-01-01

    Anorectal melanoma is a very rare tumor with poor prognosis. Rectal bleeding is the most frequent symptom and surgical treatment ranges from local excision to radical abdominoperineal resection. We report a case of a 75-years-old male patient who presented with a history of recurrent rectal bleeding, and whose histopathological diagnosis was melanoma. Macroscopically, we found two distinct tumors in anorectal region, 0.5 cm and 1.5 cm from dentate line. The first one was pedunculated, on a thin stalk, measuring 1 cm in greatest diameter, and the second one was sessile and nodular measuring up to 2.8 cm in largest diameter. Microscopic examination and immunohistochemical analysis of both tumors confirmed the diagnosis of melanoma. This case represents multiple synchronous primary melanoma of the anorectal region, with a possibility that one of the lesions is primary melanoma and the second one is a satellite lesion.

  19. Interleukin-6 and melanoma

    DEFF Research Database (Denmark)

    Hoejberg, Lise; Bastholt, Lars; Schmidt, Henrik

    2012-01-01

    Interleukin-6 (IL-6) is a pleiotropic immunomodulatory cytokine produced by various types of cells, including melanoma cells. IL-6 plays a major role in the pathogenesis and development of malignancies. It promotes tumour growth by inhibition of apoptosis and induces tumour angiogenesis. IL-6...... is deregulated in many types of cancers, and increased serum concentration of IL-6 has been correlated with a worse prognosis in patients with different cancers, including melanoma. Several serum cytokines including IL-6 play an important role in the development and progression of melanoma; however, the specific...... biological functions of IL-6 in progression of melanoma are unknown. In this review, we present studies on cell cultures and mouse models and summarize published clinical studies on IL-6 and melanoma....

  20. Melanoma during pregnancy

    DEFF Research Database (Denmark)

    de Haan, Jorine; Lok, Christianne A; de Groot, Christianne J M

    2017-01-01

    The management of melanoma during pregnancy is challenging as maternal benefits and fetal risks need to be balanced. Here, we present an overview of the incidence, the demographic and clinical characteristics and the treatment modalities used. After analysis of obstetric, fetal and maternal outcome......, recommendations for clinical practice are provided. From the 'International Network on Cancer, Infertility and Pregnancy' database, pregnant patients with melanoma were identified and analysed. Sixty pregnancies were eligible for analysis. Fifty percent of the patients presented with advanced melanoma during...... pregnancy (14 stage III and 16 stage IV), and 27% were diagnosed with recurrent melanoma. Surgery was the main therapeutic strategy during pregnancy. Only four patients with advanced melanoma were treated during pregnancy with systemic therapy (n=1) or radiotherapy (n=3). Premature delivery was observed...

  1. Analytical reagents based on pyridine aldehydes

    Energy Technology Data Exchange (ETDEWEB)

    Lejtis, L.Ya.; Skolmejstere, R.A.; Rubina, K.I.; Yansone, D.P.; Shimanskaya, N.V. (AN Latvijskoj SSR, Riga. Inst. Organicheskogo Sinteza)

    1985-03-01

    The papers published in 1950 through 1983 on the use of pyriodine aldehydes and their derivatives as analytical reagents for determining inorganic and organic substances are considered. To determining cations of transition metals, pyridine aldehydes, such as oximethanephosphonic acid, oximes azomethines, hydrazones, semicarbazones, are also applied. The complexing reactions of transition metal ions with pyrimine aldehydes and the structure of complexes obtained are considered. Spectrophotometric characteristics of complexes of Cd, V, Rv and other metals with pyridine aldehydes are given. Optimum conditions are shown for the formation of complexes as well as their stability, concentration ranges in which the beer law is observed, sensitivity and errors of spectrophotometric determination of the ions are in question.

  2. Neurotropic melanoma with prominent melanization.

    Science.gov (United States)

    Barnhill, R L; Bolognia, J L

    1995-10-01

    Neurotropic melanoma has generally been described in the context of desmoplastic melanoma. The vast majority of melanomas displaying neurotropism contain relatively little or no melanin. Herein, we report an unusual case of neurotropic melanoma with prominent melanin content. The patient developed a tumor notable for pagetoid (superficial spreading) melanoma with partial regression and a deep component characterized by perineurial aggregates of melanophages and intraneural infiltration by melanoma cells. This case serves to alert dermatopathologists to the fact that the spectrum of neurotropic melanoma includes tumors with perineurial aggregates of pigment-containing cells.

  3. Efficient and Highly Aldehyde Selective Wacker Oxidation

    KAUST Repository

    Teo, Peili

    2012-07-06

    A method for efficient and aldehyde-selective Wacker oxidation of aryl-substituted olefins using PdCl 2(MeCN) 2, 1,4-benzoquinone, and t-BuOH in air is described. Up to a 96% yield of aldehyde can be obtained, and up to 99% selectivity can be achieved with styrene-related substrates. © 2012 American Chemical Society.

  4. Chemoenzymatic Fc Glycosylation via Engineered Aldehyde Tags

    OpenAIRE

    2014-01-01

    Glycoproteins with chemically defined glycosylation sites and structures are important biopharmaceutical targets and critical tools for glycobiology. One approach toward constructing such molecules involves chemical glycosylation of aldehyde-tagged proteins. Here, we report the installation of a genetically encoded aldehyde tag at the internal glycosylation site of the crystallizable fragment (Fc) of IgG1. We replaced the natural Fc N-glycosylation sequon with a five amino-acid sequence that ...

  5. Characterization of melanoma associated spongiform scleropathy

    DEFF Research Database (Denmark)

    Alyahya, Ghassan Ayish Jabur; Heegaard, Steffen; Prause, J.U.

    2002-01-01

    ophthalmology, melanoma associated spongiform scleropathy (MASS), MASS, malignant uveal melanoma, sclera, ciliary body, choroid, histopathology......ophthalmology, melanoma associated spongiform scleropathy (MASS), MASS, malignant uveal melanoma, sclera, ciliary body, choroid, histopathology...

  6. The magic of numbers: malignant melanoma between science and pseudoscience.

    Science.gov (United States)

    Weyers, Wolfgang

    2011-06-01

    In 2009, a new system for staging and classification of malignant melanoma has been proposed by the American Joint Committee on Cancer (AJCC). The AJCC recommends that staging of primary melanoma be based on 3 criteria, namely, thickness, ulceration, and mitotic rate, the latter substituting Clark levels in the previous classification. In melanomas measuring ≤1 mm in thickness, ulceration or finding of single mitotic figure in the dermis defines stage T1b. According to the AJCC, sentinel lymph node dissection should be considered for those melanomas because of a significantly impaired prognosis. As with other prognostic parameters, however, assessment of mitotic rate, with one mitotic figure being the cutoff point, is highly unreliable, and statistics based on such data lack validity. Despite the large database being employed, they may be pseudoscience rather than science.

  7. Intravital Microscopy for Identifying Tumor Vessels in Patients With Stage IA-IV Melanoma That is Being Removed by Surgery

    Science.gov (United States)

    2016-01-13

    Recurrent Melanoma; Stage IA Skin Melanoma; Stage IB Skin Melanoma; Stage IIA Skin Melanoma; Stage IIB Skin Melanoma; Stage IIC Skin Melanoma; Stage IIIA Skin Melanoma; Stage IIIB Skin Melanoma; Stage IIIC Skin Melanoma; Stage IV Skin Melanoma

  8. General Information about Melanoma

    Science.gov (United States)

    ... or cauterized (destroyed with a hot instrument, an electric current, or a caustic substance) because cancer cells ... or being studied in the treatment of melanoma: Signal transduction inhibitor therapy: Signal transduction inhibitors block signals ...

  9. Vulval melanoma ;case report

    African Journals Online (AJOL)

    DR M.O.A. SAMAILA

    of exposure to sunlight and the amount of skin pigmentation present. ... radiation. The actual incidence of BCC world wide is not accurate because patients are often treated in. Physicians' ... McGovern V.S: The classification of melanoma.

  10. Proteomics in uveal melanoma.

    LENUS (Irish Health Repository)

    Ramasamy, Pathma

    2014-01-01

    Uveal melanoma is the most common primary intraocular malignancy in adults, with an incidence of 5-7 per million per year. It is associated with the development of metastasis in about 50% of cases, and 40% of patients with uveal melanoma die of metastatic disease despite successful treatment of the primary tumour. The survival rates at 5, 10 and 15 years are 65%, 50% and 45% respectively. Unlike progress made in many other areas of cancer, uveal melanoma is still poorly understood and survival rates have remained similar over the past 25 years. Recently, advances made in molecular genetics have improved our understanding of this disease and stratification of patients into low risk and high risk for developing metastasis. However, only a limited number of studies have been performed using proteomic methods. This review will give an overview of various proteomic technologies currently employed in life sciences research, and discuss proteomic studies of uveal melanoma.

  11. Primary Anorectal Melanoma: An Update

    Directory of Open Access Journals (Sweden)

    P Carcoforo, M.T Raiji, G.M Palini, M Pedriali, U Maestroni, G Soliani, A Detroia, M.V Zanzi, A.L Manna, J.G Crompton, R.C Langan, A Stojadinovic, I Avital

    2012-01-01

    Full Text Available The anorectum is a rare anatomic location for primary melanoma. Mucosal melanoma is a distinct biological and clinical entity from the more common cutaneous melanoma. It portrays worse prognosis than cutaneous melanoma, with distant metastases being the overwhelming cause of morbidity and mortality. Surgery is the treatment of choice, but significant controversy exists over the extent of surgical resection. We present an update on the state of the art of anorectal mucosal melanoma. To illustrate the multimodality approach to anorectal melanoma, we present a typical patient.

  12. Targeted therapy in melanoma.

    Science.gov (United States)

    Kudchadkar, Ragini R; Smalley, Keiran S M; Glass, L Frank; Trimble, James S; Sondak, Vernon K

    2013-01-01

    Since the discovery of activating mutations in the BRAF oncogene in melanoma, there has been remarkable progress in the development of targeted therapies for unresectable and metastatic melanoma. We review the latest developments in our understanding of the role of BRAF/MEK/ERK pathway signaling in melanoma, and the development of inhibitors of this pathway. We also explore alternative mutations seen in melanoma, such as NRAS, KIT, GNAQ, and GNA11, and the drug development that is ongoing based on this biology. Strategies for the management of the vexing clinical problem of BRAF inhibitor resistance, primarily via combination therapy, are outlined. With the recent approval of the BRAF inhibitor vemurafenib for stage IV metastatic melanoma, use of this agent is expanding in the United States. Thus, management of the skin toxicities of this agent, such as squamous cell carcinomas, "acneiform" eruptions, hand-foot syndrome, and panniculitis, will be a growing problem facing dermatologists today. We discuss the toxicities of targeted agents in use for melanoma, in particular the dermatologic effects and the management of these skin toxicities.

  13. The Danish Melanoma Database

    Directory of Open Access Journals (Sweden)

    Hölmich Lr

    2016-10-01

    Full Text Available Lisbet Rosenkrantz Hölmich,1 Siri Klausen,2 Eva Spaun,3 Grethe Schmidt,4 Dorte Gad,5 Inge Marie Svane,6,7 Henrik Schmidt,8 Henrik Frank Lorentzen,9 Else Helene Ibfelt10 1Department of Plastic Surgery, 2Department of Pathology, Herlev-Gentofte Hospital, University of Copenhagen, Herlev, 3Institute of Pathology, Aarhus University Hospital, Aarhus, 4Department of Plastic and Reconstructive Surgery, Breast Surgery and Burns, Rigshospitalet – Glostrup, University of Copenhagen, Copenhagen, 5Department of Plastic Surgery, Odense University Hospital, Odense, 6Center for Cancer Immune Therapy, Department of Hematology, 7Department of Oncology, Herlev-Gentofte Hospital, University of Copenhagen, Herlev, 8Department of Oncology, 9Department of Dermatology, Aarhus University Hospital, Aarhus, 10Registry Support Centre (East – Epidemiology and Biostatistics, Research Centre for Prevention and Health, Glostrup – Rigshospitalet, University of Copenhagen, Glostrup, Denmark Aim of database: The aim of the database is to monitor and improve the treatment and survival of melanoma patients.Study population: All Danish patients with cutaneous melanoma and in situ melanomas must be registered in the Danish Melanoma Database (DMD. In 2014, 2,525 patients with invasive melanoma and 780 with in situ tumors were registered. The coverage is currently 93% compared with the Danish Pathology Register.Main variables: The main variables include demographic, clinical, and pathological characteristics, including Breslow’s tumor thickness, ± ulceration, mitoses, and tumor–node–metastasis stage. Information about the date of diagnosis, treatment, type of surgery, including safety margins, results of lymphoscintigraphy in patients for whom this was indicated (tumors > T1a, results of sentinel node biopsy, pathological evaluation hereof, and follow-up information, including recurrence, nature, and treatment hereof is registered. In case of death, the cause and date

  14. TAPIOCA MELANOMA OF THE IRIS

    NARCIS (Netherlands)

    DEKEIZER, RJW; OOSTERHUIS, JA; HOUTMAN, WA; DEWOLFFROUENDAAL, D

    Clinical identification of tapioca melanoma of the iris is important because its medical treatment may differ from that of other malignant iris melanomas. The characteristic iris nodules must be differentiated from granulomatous uveitis, metastases, and Lisch nodules (neurofibromatosis). We will

  15. Advanced Melanoma Facebook Live Event

    Science.gov (United States)

    In case you missed it, watch this recent Facebook Live event about the current state of research and treatment for advanced stage melanoma. To learn more, see our evidence-based information about skin cancer, including melanoma.

  16. Um Melanoma “mascarado” Melanoma disfrazado A disguised Melanoma

    Directory of Open Access Journals (Sweden)

    Elias Ribeiro

    2012-08-01

    Full Text Available O melanoma é um tumor que se desenvolve como resultado da transformação maligna dos melanócitos, estimando-se a sua incidência global em 132.000 casos/ano. Este relato de caso reporta-se a um doente do sexo masculino com 70 anos, história de Diabetes Mellitus tipo 2 há dez anos e psoríase vulgar extensa há seis anos. Em aproximadamente um ano, este desenvolveu lesão ulcerada da região plantar do pé direito, que ao exame histológico revelou melanoma maligno, ulcerado, nível V de Clark, com 5,6 mm de espessura (Breslow. Foi submetido à exérese cirúrgica da lesão e biópsia de gânglio sentinela que foi negativa. O estadiamento inicial revelou evolução avançada do tumor primário (TNM IIC. Exames imagiológicos detetaram metastização gástrica, reclassificando a doença num estádio TNM IV. O melanoma maligno pode ser de difícil diagnóstico como se pode constatar neste caso em que uma ulceração plantar foi avaliada tardiamente, atrasando o diagnóstico de uma neoplasia grave e com elevada taxa de mortalidade. El melanoma es un tumor que se desarrolla como resultado de la transformación maligna de los melanocitos, estimándose su incidencia global en 132,000 casos/año. Este informe presenta a un paciente de sexo masculino de 70 años, con antecedentes de Diabetes Mellitus tipo 2 desde hace diez años y psoriasis vulgar extensa desde hace seis años. En aproximadamente un año el paciente desarrolló una lesión ulcerada en la región plantar del pie derecho, el examen histológico reveló un melanoma maligno, ulcerado, nivel V de Clark, de 5.6 mm de espesor (Breslow. Después de una escisión quirúrgica de la lesión, se realizó una biopsia de ganglio centinela que fue negativa. Las conclusiones iniciales revelaron una evolución avanzada del tumor primario (TNM IIC. Exámenes radiológicos detectaron una metástasis gástrica, reclasificando la enfermedad en una etapa TNM IV. El melanoma maligno puede ser de

  17. Research progress in advanced melanoma.

    Science.gov (United States)

    Luo, Cong; Shen, Jiayu

    2017-07-01

    Melanoma is a malignant tumor with high rate of metastasis and poor prognosis. How melanoma develops and how to treat it will continue to be a hot topic. This review briefly summarizes the mechanism of melanoma development and the latest progress in its treatment. Copyright © 2017 Elsevier B.V. All rights reserved.

  18. Oxidation of Aromatic Aldehydes Using Oxone

    Science.gov (United States)

    Gandhari, Rajani; Maddukuri, Padma P.; Thottumkara, Vinod K.

    2007-01-01

    The experiment demonstrating the feasibility of using water as a solvent for organic reactions which highlights the cost and environmental benefits of its use is presented. The experiment encourages students to think in terms of the reaction mechanism of the oxidation of aldehydes knowing that potassium persulfate is the active oxidant in Oxone…

  19. Parkin Somatic Mutations Link Melanoma and Parkinson's Disease.

    Science.gov (United States)

    Levin, Lotan; Srour, Shani; Gartner, Jared; Kapitansky, Oxana; Qutob, Nouar; Dror, Shani; Golan, Tamar; Dayan, Roy; Brener, Ronen; Ziv, Tamar; Khaled, Mehdi; Schueler-Furman, Ora; Samuels, Yardena; Levy, Carmit

    2016-06-20

    Epidemiological studies suggest a direct link between melanoma and Parkinson's disease (PD); however, the underlying molecular basis is unknown. Since mutations in Parkin are the major driver of early-onset PD and Parkin was recently reported to play a role in cancer development, we hypothesized that Parkin links melanoma and PD. By analyzing whole exome/genome sequencing of Parkin from 246 melanoma patients, we identified five non-synonymous mutations, three synonymous mutations, and one splice region variant in Parkin in 3.6% of the samples. In vitro analysis showed that wild-type Parkin plays a tumor suppressive role in melanoma development resulting in cell-cycle arrest, reduction of metabolic activity, and apoptosis. Using a mass spectrometry-based analysis, we identified potential Parkin substrates in melanoma and generated a functional protein association network. The activity of mutated Parkin was assessed by protein structure modeling and examination of Parkin E3 ligase activity. The Parkin-E28K mutation impairs Parkin ubiquitination activity and abolishes its tumor suppressive effect. Taken together, our analysis of genomic sequence and in vitro data indicate that Parkin is a potential link between melanoma and Parkinson's disease. Our findings suggest new approaches for early diagnosis and treatment against both diseases.

  20. Genotyping of cutaneous melanoma.

    Science.gov (United States)

    Glitza, Isabella C; Davies, Michael A

    2014-09-01

    Until recently, treatment options for patients with metastatic melanoma were very limited. This landscape has evolved dramatically since the discovery of activating mutations in the BRAF gene in ~45% of cutaneous melanomas. Vemurafenib, dabrafenib, and trametinib have all received regulatory approval for the treatment of metastatic melanoma patients with a BRAF(V600) mutation. Based on the necessity to document the presence of a BRAF(V600) mutation to prescribe these agents, molecular testing is now the standard of care in this disease. However, the options and rationale for testing are evolving rapidly due to an improved understanding of the molecular drivers and heterogeneity of melanoma. Such testing may identify rational combinatorial approaches to prevent or overcome resistance for the approved BRAF inhibitors. In addition, new clinical strategies have been identified for a number of other molecular changes that are detected in this disease, including somatic changes in NRAS, PTEN, CDKN2A, and c-KIT, among others. This review summarizes the current understanding of the genetic landscape of mutations in melanoma, their associations with clinicopathological features, and their implications for clinical testing and treatment.

  1. Targeted Therapy for Melanoma

    Energy Technology Data Exchange (ETDEWEB)

    Quinn, Thomas [Alphamed, Jackson, TN (United States); Moore, Herbert [Alphamed, Jackson, TN (United States)

    2016-12-05

    The research project, entitled ”Targeted Therapy for Melanoma,” was focused on investigating the use of kidney protection measures to lower the non-specific kidney uptake of the radiolabeled Pb-DOTA-ReCCMSH peptide. Previous published work demonstrated that the kidney exhibited the highest non-target tissue uptake of the 212Pb/203Pb radiolabeled melanoma targeting peptide DOTA-ReCCMSH. The radiolabeled alpha-melanocyte stimulating hormone (α-MSH) peptide analog DOTA-Re(Arg11)CCMSH, which binds the melanocortin-1 receptor over-expressed on melanoma tumor cells, has shown promise as a PRRT agent in pre-clinical studies. High tumor uptake of 212Pb labeled DOTA-Re(Arg11)CCMSH resulted in tumor reduction or eradication in melanoma therapy studies. Of particular note was the 20-50% cure rate observed when melanoma mice were treated with alpha particle emitter 212Pb. However, as with most PRRT agents, high radiation doses to the kidneys where observed. To optimize tumor treatment efficacy and reduce nephrotoxicity, the tumor to kidney uptake ratio must be improved. Strategies to reduce kidney retention of the radiolabeled peptide, while not effecting tumor uptake and retention, can be broken into several categories including modification of the targeting peptide sequence and reducing proximal tubule reabsorption.

  2. 40 CFR 721.5762 - Aromatic aldehyde phenolic resin (generic).

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 30 2010-07-01 2010-07-01 false Aromatic aldehyde phenolic resin... Specific Chemical Substances § 721.5762 Aromatic aldehyde phenolic resin (generic). (a) Chemical substance... aromatic aldehyde phenolic resin (PMN P-01-573) is subject to reporting under this section for...

  3. Chemoprevention of Melanoma

    Science.gov (United States)

    Madhunapantula, SubbaRao V.; Robertson, Gavin P.

    2013-01-01

    Despite advances in drug discovery programs and molecular approaches for identifying the drug targets, incidence and mortality rates due to melanoma continues to rise at an alarming rate. Existing preventive strategies generally involve mole screening followed by surgical removal of the benign nevi and abnormal moles. However, due to lack of effective programs for screening and disease recurrence after surgical resection there is a need for better chemopreventive agents. Although sunscreens have been used extensively for protecting from UV-induced skin cancer, results of correlative population based studies are controversial, requiring further authentication to conclusively confirm the chemoprotective efficacy of sunscreens. Certain studies suggest increased skin-cancer rates in sunscreen users. Therefore, effective chemopreventive agents for preventing melanoma are urgently required. This book-chapter, reviews the current understanding regarding melanoma chemoprevention and the various strategies used to accomplish this objective. PMID:22959032

  4. Targeted therapies for cutaneous melanoma.

    Science.gov (United States)

    Kee, Damien; McArthur, Grant

    2014-06-01

    Melanoma is resistant to cytotoxic therapy, and treatment options for advanced disease have been limited historically. However, improved understanding of melanoma driver mutations, particularly those involving the mitogen-activated protein kinase pathway, has led to the development of targeted therapies that are effective in this previously treatment-refractory disease. In cutaneous melanomas with BRAF V600 mutations the selective RAF inhibitors, vemurafenib and dabrafenib, and the MEK inhibitor, trametinib, have demonstrated survival benefits. Early signals of efficacy have also been demonstrated with MEK inhibitors in melanomas with NRAS mutations, and KIT inhibitors offer promise in melanomas driven through activation of their target receptor.

  5. MicroRNA-155 targets the SKI gene in human melanoma cell lines.

    Science.gov (United States)

    Levati, Lauretta; Pagani, Elena; Romani, Sveva; Castiglia, Daniele; Piccinni, Eugenia; Covaciu, Claudia; Caporaso, Patrizia; Bondanza, Sergio; Antonetti, Francesca R; Bonmassar, Enzo; Martelli, Fabio; Alvino, Ester; D'Atri, Stefania

    2011-06-01

    The SKI protein is a transcriptional coregulator over-expressed in melanoma. Experimentally induced down-regulation of SKI inhibits melanoma cell growth in vitro and in vivo. MicroRNAs (miRNAs) negatively modulate gene expression and have been implicated in oncogenesis. We previously showed that microRNA-155 (miR-155) is down-regulated in melanoma cells as compared with normal melanocytes and that its ectopic expression impairs proliferation and induces apoptosis. Here, we investigated whether miR-155 could mediate melanoma growth inhibition via SKI gene silencing. Luciferase reporter assays demonstrated that miR-155 interacted with SKI 3'UTR and impaired gene expression. Transfection of melanoma cells with miR-155 reduced SKI levels, while inhibition of endogenous miR-155 up-regulated SKI expression. Specifically designed small interfering RNAs reduced SKI expression and inhibited proliferation. However, melanoma cells over-expressing a 3'UTR-deleted SKI were still susceptible to the antiproliferative effect of miR-155. Our data demonstrate for the first time that SKI is a target of miR-155 in melanoma. However, impairment of SKI expression is not the leading mechanism involved in the growth-suppressive effect of miR-155 found in this malignancy.

  6. Basic and clinical aspects of malignant melanoma

    Energy Technology Data Exchange (ETDEWEB)

    Nathanson, L. (Health Sciences Center, State Univ. of New York at Stony Brook, Stony Brook, NY (US))

    1987-01-01

    This book contains the following 10 chapters: The role of oncogenes in the pathogenesis of malignant melanoma; Laminin and fibronectin modulate the metastatic activity of melanoma cells; Structure, function and biosynthesis of ganglioside antigens associated with human tumors derived from the neuroectoderm; Epidemiology of ocular melanoma; Malignant melanoma: Prognostic factors; Endocrine influences on the natural history of human malignant melanoma; Psychosocial factors associated with prognostic indicators, progression, psychophysiology, and tumor-host response in cutaneous malignant melanoma; Central nervous system metastases in malignant melanoma; Interferon trials in the management of malignant melanoma and other neoplasms: an overview; and The treatment of malignant melanoma by fast neutrons.

  7. What's New in Research and Treatment of Melanoma Skin Cancer?

    Science.gov (United States)

    ... Z About Melanoma Skin Cancer What Is Melanoma Skin Cancer? Key Statistics for Melanoma Skin Cancer What’s New in Melanoma ... Policy . About Melanoma Skin Cancer What Is Melanoma Skin Cancer? Key Statistics for Melanoma Skin Cancer What’s New in Melanoma ...

  8. Aldehyde-induced xanthine oxidase activity in raw milk.

    Science.gov (United States)

    Steffensen, Charlotte L; Andersen, Henrik J; Nielsen, Jacob H

    2002-12-04

    In the present study, the aldehyde-induced pro-oxidative activity of xanthine oxidase was followed in an accelerated raw milk system using spin-trap electron spin resonance (ESR) spectroscopy. The aldehydes acetaldehyde, propanal, hexanal, trans-2-hexenal, trans-2-heptenal, trans-2-nonenal, and 3-methyl-2-butenal were all found to initiate radical reactions when added to milk. Formation of superoxide through aldehyde-induced xanthine oxidase activity is suggested as the initial reaction, as all tested aldehydes were shown to trigger superoxide formation in an ultrahigh temperature (UHT) milk model system with added xanthine oxidase. It was found that addition of aldehydes to milk initially increased the ascorbyl radical concentration with a subsequent decay due to ascorbate depletion, which renders the formation of superoxide in milk with added aldehyde. The present study shows for the first time potential acceleration of oxidative events in milk through aldehyde-induced xanthine oxidase activity.

  9. Estrogen Receptor β in Melanoma: From Molecular Insights to Potential Clinical Utility

    Directory of Open Access Journals (Sweden)

    Monica Marzagalli

    2016-10-01

    Full Text Available Cutaneous melanoma is an aggressive tumor with its incidence increasing faster than any other cancer in the past decades. Melanoma is a heterogeneous tumor, with most patients harboring mutations in the BRAF or NRAS oncogenes, leading to the overactivation of the MAPK/ERK and PI3K/Akt pathways. The current therapeutic approaches are based on therapies targeting mutated BRAF and the downstream pathway, and on monoclonal antibodies against the immune checkpoint blockade. However, treatment resistance and side effects are common events of these therapeutic strategies.Increasing evidence supports that melanoma is a hormone-related cancer. Melanoma incidence is higher in males than in females and females have a significant survival advantage over men. Estrogens exert their effects through estrogen receptors (ER and ERβ that exert opposite effects on cancer growth: ER is associated with a proliferative action and ERβ with an anticancer effect. ERβ is the predominant estrogen receptor in melanoma and its expression decreases in melanoma progression, supporting its role as a tumor suppressor. Thus, ERβ is now considered as an effective molecular target for melanoma treatment. 17β-estradiol was reported to inhibit melanoma cells proliferation. However, clinical trials did not provide the expected survival benefits. In vitro studies demonstrate that ERβ ligands inhibit the proliferation of melanoma cells harboring the NRAS (but not the BRAF mutation, suggesting that ERβ activation might impair melanoma development through the inhibition of the PI3K/Akt pathway. These data suggest that ERβ agonists might be considered as an effective treatment strategy, in combination with MAPK inhibitors, for NRAS mutant melanomas. In an era of personalized medicine, pretreatment evaluation of the expression of ER isoforms together with the concurrent oncogenic mutations should be considered before selecting the most appropriate therapeutic intervention

  10. Cytotoxic kurubasch aldehyde from Trichilia emetica.

    Science.gov (United States)

    Traore, Maminata; Zhai, Lin; Chen, Ming; Olsen, Carl Erik; Odile, Nacoulma; Pierre, Guissou I; Bosco, Ouédrago J; Robert, Guigemdé T; Christensen, S Brøgger

    2007-01-01

    Kurubasch aldehyde, a sesquiterpenoid with an hydroxylated humulene skeleton, was isolated as free alcohol from Trichilia emetica Vahl. (Meliaceae), belonging to the order Sapindales. Related substances have been previously found in plants as esters of aromatic acids, and these plants were species belonging to the distant order Apiales. This is the first report of humulenes found in the genus Trichilia and only the second of humulenes in the order Sapindales. The aldehyde is a modest inhibitor of the growth of Plasmodium falciparum (IC50 76 microM) and slow-proliferating breast cancer cells MCF7 (78 microM), but a potent inhibitor of proliferation of S180 cancer cells (IC50 7.4 microM).

  11. Are all melanomas dangerous?

    DEFF Research Database (Denmark)

    Nørgaard, Carsten; Glud, Martin; Gniadecki, Robert

    2011-01-01

    summarizes the most recent epidemiological findings regarding the incidence of cutaneous malignant melanoma, mortality, Breslow thickness and clinical stage. Studies published between 2005 and 2010 with more than 2,000 test subjects were included in this review. These studies all report an increase...

  12. Acid Ceramidase in Melanoma

    DEFF Research Database (Denmark)

    Realini, Natalia; Palese, Francesca; Pizzirani, Daniela

    2016-01-01

    Acid ceramidase (AC) is a lysosomal cysteine amidase that controls sphingolipid signaling by lowering the levels of ceramides and concomitantly increasing those of sphingosine and its bioactive metabolite, sphingosine 1-phosphate. In the present study, we evaluated the role of AC-regulated sphing......Acid ceramidase (AC) is a lysosomal cysteine amidase that controls sphingolipid signaling by lowering the levels of ceramides and concomitantly increasing those of sphingosine and its bioactive metabolite, sphingosine 1-phosphate. In the present study, we evaluated the role of AC......-regulated sphingolipid signaling in melanoma. We found that AC expression is markedly elevated in normal human melanocytes and proliferative melanoma cell lines, compared with other skin cells (keratinocytes and fibroblasts) and non-melanoma cancer cells. High AC expression was also observed in biopsies from human...... generate lower amounts of ceramides than normal melanocytes do. This down-regulation in ceramide production appears to result from suppression of the de novo biosynthesis pathway. To test whether AC might contribute to melanoma cell proliferation, we blocked AC activity using a new potent (IC50 = 12 n...

  13. Chemotherapy for Melanoma.

    Science.gov (United States)

    Wilson, Melissa A; Schuchter, Lynn M

    2016-01-01

    Prior to the recent therapeutic advances, chemotherapy was the mainstay of treatment options for advanced-stage melanoma. A number of studies have investigated various chemotherapy combinations in order to expand on the clinical responses achieved with single-agent dacarbazine, but these have not demonstrated an improvement in overall survival. Similar objective responses were observed with the combination of carboplatin and paclitaxel as were seen with single-agent dacarbazine. The combination of chemotherapy and immunotherapy, known as biochemo-therapy, has shown high clinical responses; however, biochemo-therapy has not been shown to improve overall survival and resulted in increased toxicities. In contrast, palliation and long-term responses have been observed with localized treatment with isolated limb perfusion or infusion in limb-isolated disease. Although new, improved therapeutic options exist for first-line management of advanced-stage melanoma, chemotherapy may still be important in the palliative treatment of refractory, progressive, and relapsed melanoma. We review the various chemotherapy options available for use in the treatment and palliation of advanced-stage melanoma, discuss the important clinical trials supporting the treatment recommendations, and focus on the clinical circumstances in which treatment with chemotherapy is useful.

  14. Melanoma Risk Prediction Models

    Science.gov (United States)

    Developing statistical models that estimate the probability of developing melanoma cancer over a defined period of time will help clinicians identify individuals at higher risk of specific cancers, allowing for earlier or more frequent screening and counseling of behavioral changes to decrease risk.

  15. Congenital uveal melanoma?

    Science.gov (United States)

    Singh, Arun D; Schoenfield, Lynn A; Bastian, Boris C; Aziz, Hassan A; Marino, Meghan J; Biscotti, Charles V

    2016-01-01

    A 3-month-old infant with a white mother and Asian father presented with discoloration and prominence of the left eye since birth. Examination revealed a normal right eye. The left eye had hyperchromic heterochromia and an enlarged cornea (diameter, 13.0 mm) with intraocular pressure of 26 mm Hg. There were multiple areas of subconjunctival nodular pigmentation that extended posteriorly into the superior fornix. Fundus examination showed a large ciliochoroidal pigmented mass extending from 10:30 to 3:00 o'clock position involving the superior half of the choroid and adjacent ciliary body. The eye was enucleated, confirming the diagnosis of diffuse uveal melanoma with extraocular extension. Systemic surveillance (hepatic panel and ultrasonography of the liver) performed every 6 months for 5 years was has been negative for metastases. The tumor was investigated intensively for the panel of genes (BAP1, BRAF, NRAS12, NRAS61, GNAQ, Kit 9,11,13,17,18) implicated in pathogenesis of blue nevus, cutaneous melanoma, and mucosal melanomas with negative results. Moreover, germline BAP1 mutation could not be identified. This case possibly represents as yet unidentified uveal melanocytic proliferation rather than a true variant of uveal melanoma.

  16. What Happens after Treatment for Melanoma Skin Cancer?

    Science.gov (United States)

    ... Skin Cancer After Treatment Living as a Melanoma Skin Cancer Survivor For many people with melanoma, treatment can ... Cancers After Melanoma Skin Cancer More In Melanoma Skin Cancer About Melanoma Skin Cancer Causes, Risk Factors, and ...

  17. Do We Know What Causes Melanoma Skin Cancer?

    Science.gov (United States)

    ... Causes, Risk Factors, and Prevention What Causes Melanoma Skin Cancer? Many risk factors for melanoma have been found, ... at High Risk of Melanoma More In Melanoma Skin Cancer About Melanoma Skin Cancer Causes, Risk Factors, and ...

  18. Allylation of Aromatic Aldehyde under Microwave Irradiation

    Institute of Scientific and Technical Information of China (English)

    ZHANG,Yu-Mei; JIA,Xue-Feng; WANG,Jin-Xian

    2004-01-01

    @@ Allylation of carbonyl compounds is one of the most interesting processes for the preparation of homoallylic alcohols. Over the past few decades, many reagents have been developed for such reactions[1~3]. In this paper, we first report allylic zinc reagent 1, which can be prepared from zinc dust and allyl bromide conveniently in THF, and reacted with aromatic aldehyde to give homo-allylic alcohols under microwave irradiation.

  19. Melanoma risk prediction models

    Directory of Open Access Journals (Sweden)

    Nikolić Jelena

    2014-01-01

    Full Text Available Background/Aim. The lack of effective therapy for advanced stages of melanoma emphasizes the importance of preventive measures and screenings of population at risk. Identifying individuals at high risk should allow targeted screenings and follow-up involving those who would benefit most. The aim of this study was to identify most significant factors for melanoma prediction in our population and to create prognostic models for identification and differentiation of individuals at risk. Methods. This case-control study included 697 participants (341 patients and 356 controls that underwent extensive interview and skin examination in order to check risk factors for melanoma. Pairwise univariate statistical comparison was used for the coarse selection of the most significant risk factors. These factors were fed into logistic regression (LR and alternating decision trees (ADT prognostic models that were assessed for their usefulness in identification of patients at risk to develop melanoma. Validation of the LR model was done by Hosmer and Lemeshow test, whereas the ADT was validated by 10-fold cross-validation. The achieved sensitivity, specificity, accuracy and AUC for both models were calculated. The melanoma risk score (MRS based on the outcome of the LR model was presented. Results. The LR model showed that the following risk factors were associated with melanoma: sunbeds (OR = 4.018; 95% CI 1.724- 9.366 for those that sometimes used sunbeds, solar damage of the skin (OR = 8.274; 95% CI 2.661-25.730 for those with severe solar damage, hair color (OR = 3.222; 95% CI 1.984-5.231 for light brown/blond hair, the number of common naevi (over 100 naevi had OR = 3.57; 95% CI 1.427-8.931, the number of dysplastic naevi (from 1 to 10 dysplastic naevi OR was 2.672; 95% CI 1.572-4.540; for more than 10 naevi OR was 6.487; 95%; CI 1.993-21.119, Fitzpatricks phototype and the presence of congenital naevi. Red hair, phototype I and large congenital naevi were

  20. Radiopharmaceuticals targeting melanoma

    Energy Technology Data Exchange (ETDEWEB)

    Pham, T.Q.; Berghofer, P.; Liu, X.; Greguric, I.; Dikic, B.; Ballantyne, P.; Mattner, F.; Nguyen, V.; Loc' h, C.; Katsifis, A. [Radiopharmaceuticals Research Institute, Australian Nuclear Science and Technology Organisation, Menai, N.S.W., Sydney (Australia)

    2008-02-15

    Melanoma is one of the most aggressive cancers known with a high rate of mortality and increasing global incidence. So, the development of radiopharmaceuticals for either diagnostic or therapeutic purposes could make enormous contributions to melanoma patient health care. We have been studying melanoma tumours through several targeting mechanisms including melanin or specific receptor based radiopharmaceuticals Structure activity studies indicate that the substitution patterns on radioiodinated benzamides significantly influence the uptake mechanism from melanin to sigma-receptor binding. Furthermore, the position of the iodine as well as the presence of key functional groups and substituents has resulted in compounds with varying degrees of activity uptake and retention in tumours. From these results, a novel molecule 2-(2-(4-(4-iodo benzyl)piperazin-1-yl)-2-oxo-ethyl)isoindoline- 1,3-dione (M.E.L.037) was synthesized, labelled with iodine-123 and evaluated for application in melanoma tumour scintigraphy and radiotherapy. The tumour imaging potential of {sup 123}IM.E.L.037 was studied in vivo in C.57 B.L./ 6 J female mice bearing the B.16 F.0. murine melanoma tumour and in BALB/c nude mice bearing the A.375 human amelanotic melanoma tumour by biodistribution, competition studies and by SPECT imaging. {sup 123}I-M.E.L.037 exhibited high and rapid uptake in the B.16 F.0 melanoma tumour at 1 h (13 % I.D./g) increasing with time to reach 25 % I.D./g at 6 h. A significant uptake was also observed in the eyes (2% I.D., at 3-6 h p.i.) of black mice. No uptake was observed in the tumour or in the eyes of nude mice bearing the A.375 tumour. Due to high uptake and long retention in the tumour and rapid body clearance, standardized uptake values(S.U.V.) of {sup 123}I-M.E.L.037 were 30 and 60, at 24 and 48 h p.i.,respectively. SPECT imaging of mice bearing the B.16 melanoma indicated the radioactivity was predominately located in the tumour followed by the eyes, while no

  1. Metastatic melanoma of the heart.

    Science.gov (United States)

    Savoia, P; Fierro, M T; Zaccagna, A; Bernengo, M G

    2000-11-01

    Malignant melanoma has an unpredictable biologic behavior and is the neoplasm with the greatest propensity for cardiac involvement. Although relatively frequent at autopsy, cardiac metastases are rarely identified antemortem. We reviewed 2,810 patients with histologically confirmed malignant melanoma, who were diagnosed and followed up by our clinic. Clinical, histological, and imaging data are presented. Five cases of metastatic melanoma of the heart were identified out of 314 melanoma patients with visceral involvement. One case of a 53-year-old woman, who died unexpectedly during her first chemotherapy course, is described in detail. Postmortem examination determined the cause of death to be the presence of multiple melanoma metastases in the heart, even though the patient had shown no signs of cardiac involvement. The unpredictable biologic behavior of melanoma may lead to unusual metastatic sites, and, therefore, the heart also should be included in routine examinations. Copyright 2000 Wiley-Liss, Inc.

  2. Identification of Tumor Endothelial Cells with High Aldehyde Dehydrogenase Activity and a Highly Angiogenic Phenotype

    Science.gov (United States)

    Maishi, Nako; Ohga, Noritaka; Hida, Yasuhiro; Kawamoto, Taisuke; Iida, Junichiro; Shindoh, Masanobu; Tsuchiya, Kunihiko; Shinohara, Nobuo; Hida, Kyoko

    2014-01-01

    Tumor blood vessels play an important role in tumor progression and metastasis. It has been reported that tumor endothelial cells (TECs) exhibit highly angiogenic phenotypes compared with those of normal endothelial cells (NECs). TECs show higher proliferative and migratory abilities than those NECs, together with upregulation of vascular endothelial growth factor (VEGF) and VEGF receptor 2 (VEGFR2). Furthermore, compared with NECs, stem cell markers such as Sca-1, CD90, and multidrug resistance 1 are upregulated in TECs, suggesting that stem-like cells exist in tumor blood vessels. In this study, to reveal the biological role of stem-like TECs, we analyzed expression of the stem cell marker aldehyde dehydrogenase (ALDH) in TECs and characterized ALDHhigh TECs. TECs and NECs were isolated from melanoma-xenografted nude mice and normal dermis, respectively. ALDH mRNA expression and activity were higher in TECs than those in NECs. Next, ALDHhigh/low TECs were isolated by fluorescence-activated cell sorting to compare their characteristics. Compared with ALDHlow TECs, ALDHhigh TECs formed more tubes on Matrigel-coated plates and sustained the tubular networks longer. Furthermore, VEGFR2 expression was higher in ALDHhigh TECs than that in ALDHlow TECs. In addition, ALDH was expressed in the tumor blood vessels of in vivo mouse models of melanoma and oral carcinoma, but not in normal blood vessels. These findings indicate that ALDHhigh TECs exhibit an angiogenic phenotype. Stem-like TECs may have an essential role in tumor angiogenesis. PMID:25437864

  3. Identification of tumor endothelial cells with high aldehyde dehydrogenase activity and a highly angiogenic phenotype.

    Directory of Open Access Journals (Sweden)

    Hitomi Ohmura-Kakutani

    Full Text Available Tumor blood vessels play an important role in tumor progression and metastasis. It has been reported that tumor endothelial cells (TECs exhibit highly angiogenic phenotypes compared with those of normal endothelial cells (NECs. TECs show higher proliferative and migratory abilities than those NECs, together with upregulation of vascular endothelial growth factor (VEGF and VEGF receptor 2 (VEGFR2. Furthermore, compared with NECs, stem cell markers such as Sca-1, CD90, and multidrug resistance 1 are upregulated in TECs, suggesting that stem-like cells exist in tumor blood vessels. In this study, to reveal the biological role of stem-like TECs, we analyzed expression of the stem cell marker aldehyde dehydrogenase (ALDH in TECs and characterized ALDHhigh TECs. TECs and NECs were isolated from melanoma-xenografted nude mice and normal dermis, respectively. ALDH mRNA expression and activity were higher in TECs than those in NECs. Next, ALDHhigh/low TECs were isolated by fluorescence-activated cell sorting to compare their characteristics. Compared with ALDHlow TECs, ALDHhigh TECs formed more tubes on Matrigel-coated plates and sustained the tubular networks longer. Furthermore, VEGFR2 expression was higher in ALDHhigh TECs than that in ALDHlow TECs. In addition, ALDH was expressed in the tumor blood vessels of in vivo mouse models of melanoma and oral carcinoma, but not in normal blood vessels. These findings indicate that ALDHhigh TECs exhibit an angiogenic phenotype. Stem-like TECs may have an essential role in tumor angiogenesis.

  4. Melanoma maligno conjuntival

    Directory of Open Access Journals (Sweden)

    Gustavo Amorim Novais

    2012-08-01

    Full Text Available INTRODUÇÃO: Os tumores melanocíticos conjuntivais compreendem lesões que podem variar desde lesões benignas como os nevos conjuntivais, lesões pré-cancerosas como melanose adquirida primária com atipia até o melanoma maligno conjuntival. O reconhecimento das características clinicas destas lesões e seu diagnóstico preciso permitem o tratamento adequado, contribuindo para a redução da morbidade e mortalidade associados ao melanoma de conjuntiva. OBJETIVO: Revisão das características clinicas, diagnóstico e modalidades de tratamento clínico e cirúrgico das lesões precursoras (Nevos e melanose adquirida primária e do maligno conjuntival. MÉTODOS: Revisão de literatura através de pesquisa no banco de dados MEDLINE, PUBMED, LILACS e SciELO no período de 1980 a 2011. As palavras-chave utilizadas, individualmente ou em conjunto, foram: "conjunctival melanoma", "primary acquired melanosis", "nevi", "treatment", "chemotherapy", "recurrence", "metastasis" e "mortality". RESULTADO: Características clínicas que permitem o diagnóstico do melanoma conjuntival e sua diferenciação de outras lesões pigmentadas conjuntivais foram consideradas. O estadiamento clínico e patológico, assim como modalidades de tratamento para o melanoma maligno foram revisadas. CONCLUSÕES: Pacientes portadores de lesões pigmentadas conjuntivais devem ser avaliados por um oftalmologista especialista. A história oftalmológica, a história familiar de melanoma, e características clínicas da lesão necessitam de cuidadosa avaliação, incluindo-se a determinação do risco de malignidade. A documentação fotográfica deve ser realizada. O tratamento clínico e planejamento cirúrgico devem ser baseados na suspeita clinica. A análise histopatológica por patologista experiente é fundamental para orientação do tratamento e para identificação de fatores prognósticos, principalmente em casos de doença maligna.

  5. Oncogenes in melanoma: an update.

    Science.gov (United States)

    Kunz, Manfred

    2014-01-01

    Melanoma is a highly aggressive tumour with poor prognosis in the metastatic stage. BRAF, NRAS, and KIT are three well-known oncogenes involved in melanoma pathogenesis. Targeting of mutated BRAF kinase has recently been shown to significantly improve overall survival of metastatic melanoma patients, underscoring the particular role of this oncogene in melanoma biology. However, recurrences regularly occur within several months, which supposedly involve further oncogenes. Moreover, oncogenic driver mutations have not been described for up to 30% of all melanomas. In order to obtain a more complete picture of the mutational landscape of melanoma, more recent studies used high-throughput DNA sequencing technologies. A number of new oncogene candidates such as MAPK1/2, ERBB4, GRIN2A, GRM3, RAC1, and PREX2 were identified. Their particular role in melanoma biology is currently under investigation. Evidence for the functional relevance of some of these new oncogene candidates has been provided in in vitro and in vivo experiments. However, these findings await further validation in clinical studies. This review provides an overview on well-known melanoma oncogenes and new oncogene candidates, based on recent high-throughput sequencing studies. The list of genes discussed herein is of course not complete but highlights some of the most significant of recent findings in this area. The new candidates may support more individualized treatment approaches for metastatic melanoma patients in the future.

  6. Aldehyde Oxidase 4 Plays a Critical Role in Delaying Silique Senescence by Catalyzing Aldehyde Detoxification1[OPEN

    Science.gov (United States)

    Yarmolinsky, Dmitry; Soltabayeva, Aigerim; Samani, Talya

    2017-01-01

    The Arabidopsis (Arabidopsis thaliana) aldehyde oxidases are a multigene family of four oxidases (AAO1–AAO4) that oxidize a variety of aldehydes, among them abscisic aldehyde, which is oxidized to the phytohormone abscisic acid. Toxic aldehydes are generated in plants both under normal conditions and in response to stress. The detoxification of such aldehydes by oxidation is attributed to aldehyde dehydrogenases but never to aldehyde oxidases. The feasibility of the detoxification of aldehydes in siliques via oxidation by AAO4 was demonstrated, first, by its ability to efficiently oxidize an array of aromatic and aliphatic aldehydes, including the reactive carbonyl species (RCS) acrolein, hydroxyl-2-nonenal, and malondialdehyde. Next, exogenous application of several aldehydes to siliques in AAO4 knockout (KO) Arabidopsis plants induced severe tissue damage and enhanced malondialdehyde levels and senescence symptoms, but not in wild-type siliques. Furthermore, abiotic stresses such as dark and ultraviolet C irradiation caused an increase in endogenous RCS and higher expression levels of senescence marker genes, leading to premature senescence of KO siliques, whereas RCS and senescence marker levels in wild-type siliques were hardly affected. Finally, in naturally senesced KO siliques, higher endogenous RCS levels were associated with enhanced senescence molecular markers, chlorophyll degradation, and earlier seed shattering compared with the wild type. The aldehyde-dependent differential generation of superoxide and hydrogen peroxide by AAO4 and the induction of AAO4 expression by hydrogen peroxide shown here suggest a self-amplification mechanism for detoxifying additional reactive aldehydes produced during stress. Taken together, our results indicate that AAO4 plays a critical role in delaying senescence in siliques by catalyzing aldehyde detoxification. PMID:28188272

  7. Melanoma stem cells.

    Science.gov (United States)

    Roesch, Alexander

    2015-02-01

    The cancer stem cell concept significantly broadens our understanding of melanoma biology. However, this concept should be regarded as an integral part of a holistic cancer model that also includes the genetic evolution of tumor cells and the variability of cell phenotypes within a dynamic tumor microenvironment. The biologic complexity and methodological difficulties in identifying cancer stem cells and their biomarkers are currently impeding the direct translation of experimental findings into clinical practice. Nevertheless, it is these methodological shortcomings that provide a new perspective on the phenotypic heterogeneity and plasticity of melanoma with important consequences for future therapies. The development of new combination treatment strategies, particularly with regard to overcoming treatment resistance, could significantly benefit from targeted elimination of cell subpopulations with cancer stem cell properties. © 2015 Deutsche Dermatologische Gesellschaft (DDG). Published by John Wiley & Sons Ltd.

  8. [Treatment of conjunctival melanoma].

    Science.gov (United States)

    Salazar Méndez, R; Baamonde Arbaiza, B; de la Roz Martín, P; Parra Rodríguez, T

    2014-02-01

    The cases of an 86 year-old woman and a 61 year-old man with conjunctival pigmented tumors are presented. An excisional biopsy, conjunctival cryotherapy and amniotic membrane grafts were performed in both cases, along with the application of mitomycin-C in the postoperative period. The histology study confirmed the clinical suspicion of melanoma. Tolerance was good during the follow-up with no signs of recurrence in the last 12 and 6 months, respectively. The recommended treatment for conjunctival melanoma is surgical removal with adjunctive therapies such as cryotherapy or topical mitomycin-C. This is a well tolerated therapy and effective for preventing recurrences in the short-medium term. Copyright © 2011 Sociedad Española de Oftalmología. Published by Elsevier Espana. All rights reserved.

  9. Malignant melanoma of choroid

    Directory of Open Access Journals (Sweden)

    Manohar S

    1991-01-01

    Full Text Available Four cases of malignant melanoma of the choroid are reported due to rarity of the condition in India. One of the cases presented with Naevus of Ota. All the cases had typical clinical and investigative features. All cases were enucleated. Histopathologically three of them were of mixed type and one was of the epithelioid type. Two of the cases were seen in patients below 40 years of age.

  10. Beyond BRAF in melanoma.

    Science.gov (United States)

    Daud, Adil; Bastian, Boris C

    2012-01-01

    Recent progress in the analysis of genetic alterations in melanoma has identified recurrent mutations that result in the activation of critical signaling pathways promoting growth and survival of tumors cells. Alterations in the RAS-RAF-MAP kinase and PI3-kinase signaling pathways are commonly altered in melanoma. Mutations in BRAF, NRAS, KIT, and GNAQ occur in a mutually exclusive pattern and lead to MAP-kinase activation. Loss of PTEN function, primarily by deletion, is the most common known genetic alteration in the PI3-kinase cascade, and is commonly associated with BRAF mutations (Curtin et al., N Engl J Med 353:2135-2147, 2005; Tsao et al., Cancer Res 60:1800-1804, 2000, J Investig Dermatol 122:337-341, 2004). The growth advantage conveyed by the constitutive activation of these pathways leads to positive selection of cells that have acquired the mutations and in many instances leads to critical dependency of the cancer cells on their activation. This creates opportunities for therapeutic interventions targeted at signaling components within these pathways that are amenable for pharmacological inhibition. This concept follows the paradigm established by the landmark discovery that inhibition of the fusion kinase BCR-ABL can be used to treat chronic myelogenous leukemia (Druker et al., N Engl J Med 344:1031-037, 2001). The review will focus primarily on kinases involved in signaling that are currently being evaluated for therapeutic intervention in melanoma.

  11. Adjuvant Therapy: Melanoma

    Directory of Open Access Journals (Sweden)

    Diwakar Davar

    2011-01-01

    Full Text Available With an incidence that is increasing at 2–5% per year, cutaneous melanoma is an international scourge that disproportionately targets young individuals. Despite much research, the treatment of advanced disease is still quite challenging. Immunotherapy with high-dose interferon-α2b or interleukin-2 benefits a select group of patients in the adjuvant and metastatic settings, respectively, with significant attendant toxicity. Advances in the biology of malignant melanoma and the role of immunomodulatory therapy have produced advances that have stunned the field. In this paper, we review the data for the use of interferon-α2b in various dosing ranges, vaccine therapy, and the role of radiotherapy in the adjuvant setting for malignant melanoma. Recent trials in the metastatic setting using anticytoxic T-lymphocyte antigen-4 (anti-CTLA-4 monoclonal antibody therapy and BRAF inhibitor therapy have demonstrated clear benefit with prolongation of survival. Trials investigating combinations of these novel agents with existing immunomodulators are at present underway.

  12. A disguised Melanoma

    Directory of Open Access Journals (Sweden)

    Cláudia Sofia Rego

    2012-02-01

    Full Text Available Melanoma is a tumor that develops as a result of the malignant transformation of the melanocytes. There is a worldwide estimate of 132,000 new cases per year. This case study presents a 70-year-old male person with history of Diabetes Mellitus type 2 for 10 years and extensive psoriasis vulgaris for 6 years. The patient developed an ulcerated lesion in the plantar region of the right foot in one-year time period. The histological examination revealed an ulcerated malignant melanoma, Clark level V, 5.6 mm thick (Breslow. The lesion was surgically removed and the sentinel lymph node biopsy was negative. Initial conclusions revealed an advanced state of evolution of the primary tumor (TNM IIC. CAT scan detected gastric metastasis, reclassifying the illness as a TNM IV stage. Malignant melanoma may be difficult to diagnose, as it was possible to observe in this case study, where a foot ulcer was late diagnosed, delaying the diagnosis of a severe neoplasia with high mortality rate.

  13. Biogenic aldehyde determination by reactive paper spray ionization mass spectrometry

    Energy Technology Data Exchange (ETDEWEB)

    Bag, Soumabha; Hendricks, P.I. [Aston Labs, Department of Chemistry, Purdue University, West Lafayette, IN 47907 (United States); Reynolds, J.C. [Centre for Analytical Science, Loughborough University, Loughborough, Leicestershire (United Kingdom); Cooks, R.G., E-mail: cooks@purdue.edu [Aston Labs, Department of Chemistry, Purdue University, West Lafayette, IN 47907 (United States)

    2015-02-20

    Highlights: • In-situ derivatization and simultaneous ionization used to detect aldehydes. • Biogenic aliphatic and aromatic aldehydes reacted with 4-aminophenol. • Derivatized products yield structurally characteristic fragment ions. • This measurement demonstrated using a miniaturized portable mass spectrometer. - Abstract: Ionization of aliphatic and aromatic aldehydes is improved by performing simultaneous chemical derivatization using 4-aminophenol to produce charged iminium ions during paper spray ionization. Accelerated reactions occur in the microdroplets generated during the paper spray ionization event for the tested aldehydes (formaldehyde, n-pentanaldehyde, n-nonanaldehyde, n-decanaldehyde, n-dodecanaldehyde, benzaldehyde, m-anisaldehyde, and p-hydroxybenzaldehyde). Tandem mass spectrometric analysis of the iminium ions using collision-induced dissociation demonstrated that straight chain aldehydes give a characteristic fragment at m/z 122 (shown to correspond to protonated 4-(methyleneamino)phenol), while the aromatic aldehyde iminium ions fragment to give a characteristic product ion at m/z 120. These features allow straightforward identification of linear and aromatic aldehydes. Quantitative analysis of n-nonaldehyde using a benchtop mass spectrometer demonstrated a linear response over 3 orders of magnitude from 2.5 ng to 5 μg of aldehyde loaded on the filter paper emitter. The limit of detection was determined to be 2.2 ng for this aldehyde. The method had a precision of 22%, relative standard deviation. The experiment was also implemented using a portable ion trap mass spectrometer.

  14. ADAM15 expression is downregulated in melanoma metastasis compared to primary melanoma

    Energy Technology Data Exchange (ETDEWEB)

    Ungerer, Christopher; Doberstein, Kai [Pharmazentrum Frankfurt/ZAFES, University Hospital Goethe University Frankfurt, Frankfurt am Main (Germany); Buerger, Claudia; Hardt, Katja; Boehncke, Wolf-Henning [Department of Dermatology, Clinic of the Goethe-University, Theodor-Stern-Kai, Frankfurt (Germany); Boehm, Beate [Division of Rheumatology, Goethe University, Frankfurt am Main (Germany); Pfeilschifter, Josef [Pharmazentrum Frankfurt/ZAFES, University Hospital Goethe University Frankfurt, Frankfurt am Main (Germany); Dummer, Reinhard [Department of Pathology, Institute of Surgical Pathology, University Hospital, Zurich (Switzerland); Mihic-Probst, Daniela [Department of Dermatology, University Hospital Zurich (Switzerland); Gutwein, Paul, E-mail: p.gutwein@med.uni-frankfurt.de [Pharmazentrum Frankfurt/ZAFES, University Hospital Goethe University Frankfurt, Frankfurt am Main (Germany)

    2010-10-22

    Research highlights: {yields} Strong ADAM15 expression is found in normal melanocytes. {yields} ADAM15 expression is significantly downregulated in patients with melanoma metastasis. {yields} TGF-{beta} can downregulate ADAM15 expression in melanoma cells. {yields} Overexpression of ADAM15 in melanoma cells inhibits migration, proliferation and invasion of melanoma cells. {yields} Conclusion: ADAM15 represents an tumor suppressor protein in melanoma. -- Abstract: In a mouse melanoma metastasis model it has been recently shown that ADAM15 overexpression in melanoma cells significantly reduced the number of metastatic nodules on the lung. Unfortunately, the expression of ADAM15 in human melanoma tissue has not been determined so far. In our study, we characterized the expression of ADAM15 in tissue micro-arrays of patients with primary melanoma with melanoma metastasis. ADAM15 was expressed in melanocytes and endothelial cells of benign nevi and melanoma tissue. Importantly, ADAM15 was significantly downregulated in melanoma metastasis compared to primary melanoma. We further demonstrate that IFN-{gamma} and TGF-{beta} downregulate ADAM15 protein levels in melanoma cells. To investigate the role of ADAM15 in melanoma progression, we overexpressed ADAM15 in melanoma cells. Importantly, overexpression of ADAM15 in melanoma cells reduced the migration, invasion and the anchorage dependent and independent cell growth of melanoma cells. In summary, the downregulation of ADAM15 plays an important role in melanoma progression and ADAM15 act as a tumorsuppressor in melanoma.

  15. TAPIOCA MELANOMA OF THE IRIS

    NARCIS (Netherlands)

    DEKEIZER, RJW; OOSTERHUIS, JA; HOUTMAN, WA; DEWOLFFROUENDAAL, D

    1993-01-01

    Clinical identification of tapioca melanoma of the iris is important because its medical treatment may differ from that of other malignant iris melanomas. The characteristic iris nodules must be differentiated from granulomatous uveitis, metastases, and Lisch nodules (neurofibromatosis). We will dis

  16. Angiogenic profile of uveal melanoma.

    NARCIS (Netherlands)

    Notting, I.C.; Missotten, G.S.; Sijmons, B.; Boonman, Z.F.; Keunen, J.E.E.; Pluijm, G. van der

    2006-01-01

    Uveal melanoma develops in one of the most capillary-rich tissues of the body and is disseminated hematogenously. Knowledge of the nature and the spatiotemporal expression of angiogenic factors in uveal melanoma is essential to the development of new treatment strategies, especially with regard to i

  17. Clinical characteristics and management of melanoma families

    NARCIS (Netherlands)

    Rhee, Jasper Immanuel van der

    2013-01-01

    Being a member of a melanoma family is a major risk factor for cutaneous malignant melanoma. In this thesis clinical characteristics and management of melanoma families are discussed. In the first part of the thesis clinical and histological characteristics of melanoma (patients) from families with

  18. Clinical characteristics and management of melanoma families

    NARCIS (Netherlands)

    Rhee, Jasper Immanuel van der

    2013-01-01

    Being a member of a melanoma family is a major risk factor for cutaneous malignant melanoma. In this thesis clinical characteristics and management of melanoma families are discussed. In the first part of the thesis clinical and histological characteristics of melanoma (patients) from families with

  19. Comparative Aspects of Canine Melanoma

    Directory of Open Access Journals (Sweden)

    Adriana Tomoko Nishiya

    2016-02-01

    Full Text Available Melanomas are malignant neoplasms originating from melanocytes. They occur in most animal species, but the dog is considered the best animal model for the disease. Melanomas in dogs are most frequently found in the buccal cavity, but the skin, eyes, and digits are other common locations for these neoplasms. The aim of this review is to report etiological, epidemiological, pathological, and molecular aspects of melanomas in dogs. Furthermore, the particular biological behaviors of these tumors in the different body locations are shown. Insights into the therapeutic approaches are described. Surgery, chemotherapy, radiotherapy, immunotherapy, and the outcomes after these treatments are presented. New therapeutic perspectives are also depicted. All efforts are geared toward better characterization and control of malignant melanomas in dogs, for the benefit of these companion animals, and also in an attempt to benefit the treatment of human melanomas.

  20. New therapeutic targets in melanoma.

    Science.gov (United States)

    Martí, R M; Sorolla, A; Yeramian, A

    2012-09-01

    Research into molecular targets for drug development in melanoma is starting to bear fruit. Of the drugs tested to date in patients with metastatic melanoma, those that have yielded the best results are V600E BRAF inhibitors in melanomas carrying the V600E mutation; c-kit tyrosine kinase activity inhibitors in melanomas carrying c-kit mutations; and anti-cytotoxic T lymphocyte antigen 4 (CTLA-4) antibodies, which block the mechanisms involved in immune tolerance. Many problems have yet to be resolved in these areas, however, such as the rapid development of resistance to BRAF and c-kit inhibitors and the lack of biomarkers to predict treatment response in the case of CTLA-4 blockers. We review the results of targeted therapy with these and other drugs in metastatic melanoma and discuss what the future holds for this field. Copyright © 2011 Elsevier España, S.L. and AEDV. All rights reserved.

  1. The oxidation of the aldehyde groups in dialdehyde starch

    NARCIS (Netherlands)

    Haaksman, I.K.; Besemer, A.C.; Jetten, J.M.; Timmermans, J.W.; Slaghek, T.M.

    2006-01-01

    This paper describes the difference in relative reactivity of the aldehyde groups present in dialdehyde starch towards different oxidising agents. The oxidation of dialdehyde starch with peracetic acid and sodium bromide leads to only partial oxidation to give mono-aldehyde-carboxy starch, while oxi

  2. The oxidation of the aldehyde groups in dialdehyde starch

    NARCIS (Netherlands)

    Haaksman, I.K.; Besemer, A.C.; Jetten, J.M.; Timmermans, J.W.; Slaghek, T.M.

    2006-01-01

    This paper describes the difference in relative reactivity of the aldehyde groups present in dialdehyde starch towards different oxidising agents. The oxidation of dialdehyde starch with peracetic acid and sodium bromide leads to only partial oxidation to give mono-aldehyde-carboxy starch, while

  3. A chemoselective, one-pot transformation of aldehydes to nitriles.

    Science.gov (United States)

    Laulhé, Sébastien; Gori, Sadakatali S; Nantz, Michael H

    2012-10-19

    This paper describes a procedure for direct conversion of aldehydes to nitriles using O-(diphenylphosphinyl)hydroxylamine (DPPH). Aldehydes are smoothly transformed to their corresponding nitriles by heating with DPPH in toluene. The reaction can be accomplished in the presence of alcohol, ketone, ester, or amine functionality.

  4. Deodorants: an experimental provocation study with cinnamic aldehyde

    DEFF Research Database (Denmark)

    Bruze, Magnus; Johansen, Jeanne Duus; Andersen, Klaus Ejner

    2003-01-01

    BACKGROUND: Axillary dermatitis is common and overrepresented in individuals with contact allergy to fragrances. Many individuals suspect their deodorants to be the incriminating products. OBJECTIVE: Our aim was to investigate the significance of cinnamic aldehyde in deodorants for the development...... cinnamic aldehyde had been applied (P skin, can elicit axillary dermatitis within a few weeks....

  5. Interactive Tailored Website to Promote Sun Protection and Skin Self-Check Behaviors in Patients With Stage 0-III Melanoma

    Science.gov (United States)

    2017-02-15

    Stage 0 Skin Melanoma; Stage I Skin Melanoma; Stage IA Skin Melanoma; Stage IB Skin Melanoma; Stage II Skin Melanoma; Stage IIA Skin Melanoma; Stage IIB Skin Melanoma; Stage IIC Skin Melanoma; Stage III Skin Melanoma; Stage IIIA Skin Melanoma; Stage IIIB Skin Melanoma; Stage IIIC Skin Melanoma

  6. Preventing Melanoma PSA (:60)

    Centers for Disease Control (CDC) Podcasts

    2015-06-02

    This 60 second public service announcement is based on the June 2015 CDC Vital Signs report. Skin cancer is the most common form of cancer in the U.S. In 2011, there were more than 65,000 cases of melanoma, the most deadly form of skin cancer. Learn how everyone can help prevent skin cancer.  Created: 6/2/2015 by National Center for Chronic Disease Prevention and Health Promotion (NCCDPHP).   Date Released: 6/2/2015.

  7. Mechanisms of aldehyde-induced bronchial reactivity: Role of airway epithelium. Research report, July 1986-January 1991

    Energy Technology Data Exchange (ETDEWEB)

    Leikauf, G.D.

    1991-01-01

    The purpose of the study was to determine whether exposures to environmentally relevant concentrations of two aldehydes of low molecular weight were associated with impaired airway function. Specifically, the study addressed questions of the relative irritant potency of formaldehyde and acrolein on the induction of increased bronchial reactivity to acetylcholine in guinea pigs. The relationship of bronchial reactivity to epithelial damage and inflammation were also examined after both in vivo and in vitro exposures.

  8. Noninvasive genomic detection of melanoma.

    Science.gov (United States)

    Wachsman, W; Morhenn, V; Palmer, T; Walls, L; Hata, T; Zalla, J; Scheinberg, R; Sofen, H; Mraz, S; Gross, K; Rabinovitz, H; Polsky, D; Chang, S

    2011-04-01

    Early detection and treatment of melanoma is important for optimal clinical outcome, leading to biopsy of pigmented lesions deemed suspicious for the disease. The vast majority of such lesions are benign. Thus, a more objective and accurate means for detection of melanoma is needed to identify lesions for excision. To provide proof-of-principle that epidermal genetic information retrieval (EGIR™; DermTech International, La Jolla, CA, U.S.A.), a method that noninvasively samples cells from stratum corneum by means of adhesive tape stripping, can be used to discern melanomas from naevi. Skin overlying pigmented lesions clinically suspicious for melanoma was harvested using EGIR. RNA isolated from the tapes was amplified and gene expression profiled. All lesions were removed for histopathological evaluation. Supervised analysis of the microarray data identified 312 genes differentially expressed between melanomas, naevi and normal skin specimens (Pclassifier that discriminates these skin lesions. Upon testing with an independent dataset, this classifier discerned in situ and invasive melanomas from naevi with 100% sensitivity and 88% specificity, with an area under the curve for the receiver operating characteristic of 0·955. These results demonstrate that EGIR-harvested specimens can be used to detect melanoma accurately by means of a 17-gene genomic biomarker. © 2011 The Authors. BJD © 2011 British Association of Dermatologists 2011.

  9. Tumor cytotoxicity by endothelial cells. Impairment of the mitochondrial system for glutathione uptake in mouse B16 melanoma cells that survive after in vitro interaction with the hepatic sinusoidal endothelium.

    Science.gov (United States)

    Ortega, Angel L; Carretero, Julian; Obrador, Elena; Gambini, Juan; Asensi, Miguel; Rodilla, Vicente; Estrela, José M

    2003-04-18

    High GSH content associates with high metastatic activity in B16-F10 melanoma cells cultured to low density (LD B16M). GSH homeostasis was investigated in LD B16M cells that survive after adhesion to the hepatic sinusoidal endothelium (HSE). Invasive B16M (iB16M) cells were isolated using anti-Met-72 monoclonal antibodies and flow cytometry-coupled cell sorting. HSE-derived NO and H(2)O(2) caused GSH depletion and a decrease in gamma-glutamylcysteine synthetase activity in iB16M cells. Overexpression of gamma-glutamylcysteine synthetase heavy and light subunits led to a rapid recovery of cytosolic GSH, whereas mitochondrial GSH (mtGSH) further decreased during the first 18 h of culture. NO and H(2)O(2) damaged the mitochondrial system for GSH uptake (rates in iB16M were approximately 75% lower than in LD B16M cells). iB16M cells also showed a decreased activity of mitochondrial complexes II, III, and IV, less O(2) consumption, lower ATP levels, higher O(2) and H(2)O(2) production, and lower mitochondrial membrane potential. In vitro growing iB16M cells maintained high viability (>98%) and repaired HSE-induced mitochondrial damages within 48 h. However, iB16M cells with low mtGSH levels were highly susceptible to TNF-alpha-induced oxidative stress and death. Therefore depletion of mtGSH levels may represent a critical target to challenge survival of invasive cancer cells.

  10. Nifuroxazide exerts potent anti-tumor and anti-metastasis activity in melanoma.

    Science.gov (United States)

    Zhu, Yongxia; Ye, Tinghong; Yu, Xi; Lei, Qian; Yang, Fangfang; Xia, Yong; Song, Xuejiao; Liu, Li; Deng, Hongxia; Gao, Tiantao; Peng, Cuiting; Zuo, Weiqiong; Xiong, Ying; Zhang, Lidan; Wang, Ningyu; Zhao, Lifeng; Xie, Yongmei; Yu, Luoting; Wei, Yuquan

    2016-02-02

    Melanoma is a highly malignant neoplasm of melanocytes with considerable metastatic potential and drug resistance, explaining the need for new candidates that inhibit tumor growth and metastasis. The signal transducer and activator of the transcription 3 (Stat3) signaling pathway plays an important role in melanoma and has been validated as promising anticancer target for melanoma therapy. In this study, nifuroxazide, an antidiarrheal agent identified as an inhibitor of Stat3, was evaluated for its anti-melanoma activity in vitro and in vivo. It had potent anti-proliferative activity against various melanoma cell lines and could induce G2/M phase arrest and cell apoptosis. Moreover, nifuroxazide markedly impaired melanoma cell migration and invasion by down-regulating phosphorylated-Src, phosphorylated-FAK, and expression of matrix metalloproteinase (MMP) -2, MMP-9 and vimentin. It also significantly inhibited tumor growth without obvious side effects in the A375-bearing mice model by inducing apoptosis and reducing cell proliferation and metastasis. Notably, nifuroxazide significantly inhibited pulmonary metastases, which might be associated with the decrease of myeloid-derived suppressor cells (MDSCs). These findings suggested that nifuroxazide might be a potential agent for inhibiting the growth and metastasis of melanoma.

  11. Reversible, partial inactivation of plant betaine aldehyde dehydrogenase by betaine aldehyde: mechanism and possible physiological implications.

    Science.gov (United States)

    Zárate-Romero, Andrés; Murillo-Melo, Darío S; Mújica-Jiménez, Carlos; Montiel, Carmina; Muñoz-Clares, Rosario A

    2016-04-01

    In plants, the last step in the biosynthesis of the osmoprotectant glycine betaine (GB) is the NAD(+)-dependent oxidation of betaine aldehyde (BAL) catalysed by some aldehyde dehydrogenase (ALDH) 10 enzymes that exhibit betaine aldehyde dehydrogenase (BADH) activity. Given the irreversibility of the reaction, the short-term regulation of these enzymes is of great physiological relevance to avoid adverse decreases in the NAD(+):NADH ratio. In the present study, we report that the Spinacia oleracea BADH (SoBADH) is reversibly and partially inactivated by BAL in the absence of NAD(+)in a time- and concentration-dependent mode. Crystallographic evidence indicates that the non-essential Cys(450)(SoBADH numbering) forms a thiohemiacetal with BAL, totally blocking the productive binding of the aldehyde. It is of interest that, in contrast to Cys(450), the catalytic cysteine (Cys(291)) did not react with BAL in the absence of NAD(+) The trimethylammonium group of BAL binds in the same position in the inactivating or productive modes. Accordingly, BAL does not inactivate the C(450)SSoBADH mutant and the degree of inactivation of the A(441)I and A(441)C mutants corresponds to their very different abilities to bind the trimethylammonium group. Cys(450)and the neighbouring residues that participate in stabilizing the thiohemiacetal are strictly conserved in plant ALDH10 enzymes with proven or predicted BADH activity, suggesting that inactivation by BAL is their common feature. Under osmotic stress conditions, this novel partial and reversible covalent regulatory mechanism may contribute to preventing NAD(+)exhaustion, while still permitting the synthesis of high amounts of GB and avoiding the accumulation of the toxic BAL.

  12. Targeted Radionuclide Therapy of Melanoma.

    Science.gov (United States)

    Norain, Abdullah; Dadachova, Ekaterina

    2016-05-01

    An estimated 60,000 individuals in the United States and 132,000 worldwide are yearly diagnosed with melanoma. Until recently, treatment options for patients with stages III-IV metastatic disease were limited and offered marginal, if any, improvement in overall survival. The situation changed with the introduction of B-RAF inhibitors and anti-cytotoxic T-lymphocyte antigen 4 and anti-programmed cell death protein 1 immunotherapies into the clinical practice. With only some patients responding well to the immune therapies and with very serious side effects and high costs of immunotherapy, there is still room for other approaches for the treatment of metastatic melanoma. Targeted radionuclide therapy of melanoma could be divided into the domains of radioimmunotherapy (RIT), radiolabeled peptides, and radiolabeled small molecules. RIT of melanoma is currently experiencing a renaissance with the clinical trials of alpha-emitter (213)Bi-labeled and beta-emitter (188)Rhenium-labeled monoclonal antibodies in patients with metastatic melanoma producing encouraging results. The investigation of the mechanism of efficacy of melanoma RIT points at killing of melanoma stem cells by RIT and involvement of immune system such as complement-dependent cytotoxicity. The domain of radiolabeled peptides for targeted melanoma therapy has been preclinical so far, with work concentrated on radiolabeled peptide analogues of melanocyte-stimulating hormone receptor and on melanin-binding peptides. The field of radiolabeled small molecule produced radioiodinated benzamides that cross the cellular membrane and bind to the intracellular melanin. The recent clinical trial demonstrated measurable antitumor effects and no acute or midterm toxicities. We are hopeful that the targeted radionuclide therapy of metastatic melanoma would become a clinical reality as a stand-alone therapy or in combination with the immunotherapies such as anti-PD1 programmed cell death protein 1 monoclonal antibodies

  13. Melanoma Lentiginoso Acral

    Directory of Open Access Journals (Sweden)

    Gloria Andrea Vargas Suaza

    2008-12-01

    Full Text Available El melanoma lentiginoso acral (MLA es una variante rápidamente progresiva del melanoma maligno (MM. Constituye el 5-10% de todos los tipos de MM y se presenta con mayor frecuencia en pacientes de raza negra, asiáticos y latinoamericanos. En Colombia el MM se encuentra en aumento, con una incidencia de 3.5/100.000, siendo el MLA una de las variantes más comunes. La edad promedio de presentación es de 58 años, con una tasa de sobrevida menor para las personas de raza negra, asociado a un diagnóstico tardío. EL MLA se localiza en plantas, palmas y región subungueal y en su etiopatología se ha descrito la presencia de mutaciones en genes: 9p21 (p16: 67%, 11q13 (CCND1 (47%, 22q11-q13 (40% y 5p15 (20%. El diagnóstico de MLA, se ha fundamentado clásicamente en la histopatología. Herramientas de diagnóstico como la dermatoscopia, la evaluación del ganglio centinela y la determinación de alteraciones en las proteínas del ciclo celular contribuyen a la detección precoz del MLA y el MM en general.

  14. Morphogenesis of early stage melanoma

    Science.gov (United States)

    Chatelain, Clément; Amar, Martine Ben

    2015-08-01

    Melanoma early detection is possible by simple skin examination and can insure a high survival probability when successful. However it requires efficient methods for identifying malignant lesions from common moles. This paper provides an overview first of the biological and physical mechanisms controlling melanoma early evolution, and then of the clinical tools available today for detecting melanoma in vivo at an early stage. It highlights the lack of diagnosis methods rationally linking macroscopic observables to the microscopic properties of the tissue, which define the malignancy of the tumor. The possible inputs of multiscale models for improving these methods are shortly discussed.

  15. Five Fatty Aldehyde Dehydrogenase Enzymes from Marinobacter and Acinetobacter spp. and Structural Insights into the Aldehyde Binding Pocket.

    Science.gov (United States)

    Bertram, Jonathan H; Mulliner, Kalene M; Shi, Ke; Plunkett, Mary H; Nixon, Peter; Serratore, Nicholas A; Douglas, Christopher J; Aihara, Hideki; Barney, Brett M

    2017-06-15

    Enzymes involved in lipid biosynthesis and metabolism play an important role in energy conversion and storage and in the function of structural components such as cell membranes. The fatty aldehyde dehydrogenase (FAldDH) plays a central function in the metabolism of lipid intermediates, oxidizing fatty aldehydes to the corresponding fatty acid and competing with pathways that would further reduce the fatty aldehydes to fatty alcohols or require the fatty aldehydes to produce alkanes. In this report, the genes for four putative FAldDH enzymes from Marinobacter aquaeolei VT8 and an additional enzyme from Acinetobacter baylyi were heterologously expressed in Escherichia coli and shown to display FAldDH activity. Five enzymes (Maqu_0438, Maqu_3316, Maqu_3410, Maqu_3572, and the enzyme reported under RefSeq accession no. WP_004927398) were found to act on aldehydes ranging from acetaldehyde to hexadecanal and also acted on the unsaturated long-chain palmitoleyl and oleyl aldehydes. A comparison of the specificities of these enzymes with various aldehydes is presented. Crystallization trials yielded diffraction-quality crystals of one particular FAldDH (Maqu_3316) from M. aquaeolei VT8. Crystals were independently treated with both the NAD(+) cofactor and the aldehyde substrate decanal, revealing specific details of the likely substrate binding pocket for this class of enzymes. A likely model for how catalysis by the enzyme is accomplished is also provided.IMPORTANCE This study provides a comparison of multiple enzymes with the ability to oxidize fatty aldehydes to fatty acids and provides a likely picture of how the fatty aldehyde and NAD(+) are bound to the enzyme to facilitate catalysis. Based on the information obtained from this structural analysis and comparisons of specificities for the five enzymes that were characterized, correlations to the potential roles played by specific residues within the structure may be drawn. Copyright © 2017 American Society for

  16. Melanoma Surveillance in the US: The Economic Burden of Melanoma

    Centers for Disease Control (CDC) Podcasts

    2011-10-19

    This podcast accompanies the publication of a series of articles on melanoma surveillance in the United States, available in the November supplement edition of the Journal of the American Academy of Dermatology. Dr. Gery Guy, from the CDC’s Division of Cancer Prevention and Control, discusses the economic burden of melanoma.  Created: 10/19/2011 by National Center for Chronic Disease Prevention and Health Promotion (NCCDPHP).   Date Released: 10/19/2011.

  17. High accuracy of family history of melanoma in Danish melanoma cases

    DEFF Research Database (Denmark)

    Wadt, Karin A W; Drzewiecki, Krzysztof T; Gerdes, Anne-Marie

    2015-01-01

    The incidence of melanoma in Denmark has immensely increased over the last 10 years making Denmark a high risk country for melanoma. In the last two decades multiple public campaigns have sought to increase the awareness of melanoma. Family history of melanoma is a known major risk factor...... but previous studies have shown that self-reported family history of melanoma is highly inaccurate. These studies are 15 years old and we wanted to examine if a higher awareness of melanoma has increased the accuracy of self-reported family history of melanoma. We examined the family history of 181 melanoma...... probands who reported 199 cases of melanoma in relatives, of which 135 cases where in first degree relatives. We confirmed the diagnosis of melanoma in 77% of all relatives, and in 83% of first degree relatives. In 181 probands we validated the negative family history of melanoma in 748 first degree...

  18. Aldehyde concentrations in wet deposition and river waters

    Energy Technology Data Exchange (ETDEWEB)

    Dąbrowska, Agata, E-mail: agatadab@amu.edu.pl; Nawrocki, Jacek

    2013-05-01

    The process of pollutants removal from the atmosphere can be responsible for the appearance of aldehydes in surface waters. We observed that formaldehyde, acetaldehyde, propanal, glyoxal, methylglyoxal and acetone were commonly present in precipitations as well as in surface water samples, while semi-volatile and poorly soluble aldehydes as nonanal and decanal were observed seasonally. Particularly high level of carbonyls concentration was noted after periods of drought and at the beginning of rainy periods. We estimated that ca. 40% of aldehydes from wet precipitations were delivered into river waters. The level of carbonyl concentration in river was positively correlated with specific local meteorological conditions such as solar radiation and ozone concentration, in contrast, there was negative correlation between aldehyde concentration in the river samples and the precipitation intensity. - Highlights: ► Atmosphere pollutants are responsible for the appearance of aldehydes in surface waters. ► Volatile aldehydes are commonly present in precipitations as well as in surface waters. ► Semi-volatile and poorly soluble aldehydes as nonanal and decanal were observed seasonally. ► High concentration of carbonyls were noted after periods of drought and at the beginning of rain. ► Carbonyl concentration in river is correlated to meteorological conditions.

  19. Podoplanin Expression in Canine Melanoma.

    Science.gov (United States)

    Ogasawara, Satoshi; Honma, Ryusuke; Kaneko, Mika K; Fujii, Yuki; Kagawa, Yumiko; Konnai, Satoru; Kato, Yukinari

    2016-12-01

    A type I transmembrane protein, podoplanin (PDPN), is expressed in several normal cells such as lymphatic endothelial cells or pulmonary type I alveolar cells. We recently demonstrated that anticanine PDPN monoclonal antibody (mAb), PMab-38, recognizes canine PDPN of squamous cell carcinomas, but does not react with lymphatic endothelial cells. Herein, we investigated whether PMab-38 reacts with canine melanoma. PMab-38 reacted with 90% of melanoma cells (9/10 cases) using immunohistochemistry. Of interest, PMab-38 stained the lymphatic endothelial cells and cancer-associated fibroblasts in melanoma tissues, although it did not stain any lymphatic endothelial cells in normal tissues. PMab-38 could be useful for uncovering the function of PDPN in canine melanomas.

  20. BRAF mutations in conjunctival melanoma

    DEFF Research Database (Denmark)

    Larsen, Ann-Cathrine; Dahl, Christina; Dahmcke, Christina M.

    2016-01-01

    Purpose: To investigate incidence, clinicopathological features and prognosis of BRAF-mutated conjunctival melanoma in Denmark. Furthermore, to determine BRAF mutations in paired premalignant lesions and evaluate immunohistochemical BRAF V600E oncoprotein detection. Methods: Data from 139 patients...

  1. [Ocular metastasis of cutaneous melanoma].

    Science.gov (United States)

    Galland, F; Balansard, B; Conrath, J; Forzano, O; Ridings, B

    2004-02-01

    We report a case of vitreal metastases from cutaneous melanoma. We describe the clinical findings and the histological aspects of the lesions, which allows us to discuss the diagnosis of masquerade syndrome and highlight the diagnostic importance of vitreous biopsy.

  2. Recombinant DNA technology for melanoma immunotherapy: anti-Id DNA vaccines targeting high molecular weight melanoma-associated antigen.

    Science.gov (United States)

    Barucca, A; Capitani, M; Cesca, M; Tomassoni, D; Kazmi, U; Concetti, F; Vincenzetti, L; Concetti, A; Venanzi, F M

    2014-11-01

    Anti-idiotypic MK2-23 monoclonal antibody (anti-Id MK2-23 mAb), which mimics the high molecular weight melanoma-associated antigen (HMW-MAA), has been used to implement active immunotherapy against melanoma. However, due to safety and standardization issues, this approach never entered extensive clinical trials. In the present study, we investigated the usage of DNA vaccines as an alternative to MK2-23 mAb immunization. MK2-23 DNA plasmids coding for single chain (scFv) MK2-23 antibody were constructed via the insertion of variable heavy (V H) and light (V L) chains of MK2-23 into the pVAC-1mcs plasmids. Two alternative MK2-23 plasmids format V H/V L, and V L/V H were assembled. We demonstrate that both polypeptides expressed by scFv plasmids in vitro retained the ability to mimic HMW-MAA antigen, and to elicit specific anti-HMW-MAA humoral and cellular immunoresponses in immunized mice. Notably, MK2-23 scFv DNA vaccines impaired the onset and growth of transplantable B16 melanoma cells not engineered to express HMW-MAA. This pilot study suggests that optimized MK2-23 scFv DNA vaccines could potentially provide a safer and cost-effective alternative to anti-Id antibody immunization, for melanoma immunotherapy.

  3. Turn on Fluorescent Probes for Selective Targeting of Aldehydes

    Directory of Open Access Journals (Sweden)

    Ozlem Dilek

    2016-03-01

    Full Text Available Two different classes of fluorescent dyes were prepared as a turn off/on sensor system for aldehydes. Amino derivatives of a boron dipyrromethene (BDP fluorophore and a xanthene-derived fluorophore (rosamine were prepared. Model compounds of their product with an aldehyde were prepared using salicylaldehyde. Both amino boron dipyrromethene and rosamine derivatives are almost non-fluorescent in polar and apolar solvent. However, imine formation with salicylaldehyde on each fluorophore increases the fluorescence quantum yield by almost a factor of 10 (from 0.05 to 0.4. These fluorophores are therefore suitable candidates for development of fluorescence-based sensors for aldehydes.

  4. Threshold responses in cinnamic-aldehyde-sensitive subjects

    DEFF Research Database (Denmark)

    Johansen, J D; Andersen, K E; Rastogi, Suresh Chandra

    1996-01-01

    Cinnamic aldehyde is an important fragrance material and contact allergen. The present study was performed to provide quantitative data on the eliciting capacity of cinnamic aldehyde, to be considered in assessment of clinical relevance and health hazard. The skin response to serial dilution patch...... usage concentrations in different kind of cosmetics. 72% (13/18) developed eczema in the use test performed with an alcoholic solution of cinnamic aldehyde on healthy upper arm skin. 6 of the 13 use-test-positive subjects (46%) reacted later than day 7, indicating that the standard exposure period of 7...

  5. Rap1-GTP-interacting Adaptor Molecule (RIAM) Protein Controls Invasion and Growth of Melanoma Cells*

    Science.gov (United States)

    Hernández-Varas, Pablo; Coló, Georgina P.; Bartolomé, Ruben A.; Paterson, Andrew; Medraño-Fernández, Iria; Arellano-Sánchez, Nohemí; Cabañas, Carlos; Sánchez-Mateos, Paloma; Lafuente, Esther M.; Boussiotis, Vassiliki A.; Strömblad, Staffan; Teixidó, Joaquin

    2011-01-01

    The Mig-10/RIAM/lamellipodin (MRL) family member Rap1-GTP-interacting adaptor molecule (RIAM) interacts with active Rap1, a small GTPase that is frequently activated in tumors such as melanoma and prostate cancer. We show here that RIAM is expressed in metastatic human melanoma cells and that both RIAM and Rap1 are required for BLM melanoma cell invasion. RIAM silencing in melanoma cells led to inhibition of tumor growth and to delayed metastasis in a severe combined immunodeficiency xenograft model. Defective invasion of RIAM-silenced melanoma cells arose from impairment in persistent cell migration directionality, which was associated with deficient activation of a Vav2-RhoA-ROCK-myosin light chain pathway. Expression of constitutively active Vav2 and RhoA in cells depleted for RIAM partially rescued their invasion, indicating that Vav2 and RhoA mediate RIAM function. These results suggest that inhibition of cell invasion in RIAM-silenced melanoma cells is likely based on altered cell contractility and cell polarization. Furthermore, we show that RIAM depletion reduces β1 integrin-dependent melanoma cell adhesion, which correlates with decreased activation of both Erk1/2 MAPK and phosphatidylinositol 3-kinase, two central molecules controlling cell growth and cell survival. In addition to causing inhibition of cell proliferation, RIAM silencing led to higher susceptibility to cell apoptosis. Together, these data suggest that defective activation of these kinases in RIAM-silenced cells could account for inhibition of melanoma cell growth and that RIAM might contribute to the dissemination of melanoma cells. PMID:21454517

  6. [Choroidal melanoma - evolution and prognosis].

    Science.gov (United States)

    Chiruţa, Daria; Stan, Cristina

    2014-01-01

    Choroidal melanoma is the most common primary intraocular malignant tumor. We present the case of a 62 year old patient who was diagnosed with intraocular tumor in his right eye, for about three years. Regarding the fact that the patient refused any kind of treatment during this period, we just had the opportunity to monitor this case. Finally, the diagnosis was choroidal melanoma, confirmed by the histopathological exam.

  7. Management of melanoma during pregnancy.

    Science.gov (United States)

    Leachman, Sancy A; Jackson, Ryan; Eliason, Mark J; Larson, April A; Bolognia, Jean L

    2007-04-01

    There is no conclusive evidence that pregnancy adversely affects overall survival in patients with melanoma. Clinicians caring for pregnant patients should be as suspicious of changes in melanocytic nevi in these patients as they are for nonpregnant patients. Treatment of early-stage melanoma is the same irrespective of whether or not the patient is pregnant. Chemotherapeutic regimens for metastatic disease administered during pregnancy have not demonstrated significant efficacy.

  8. Fulminant metastatic malignant melanoma

    Directory of Open Access Journals (Sweden)

    N.M.K. Faheem,

    2012-07-01

    Full Text Available A 50-year-old lady presented with complaints of chest pain and cough for the past one month. Right supraclavicular lymphadenopathy, bilateral pleural effusion were present. Fine needle aspiration cytology (FNAC from the lymph node showed brownish-black pigment laden tumour cells. Review of history subsequently revealed that she had undergone a surgical procedure over the sole of her left foot three years ago of which no records were available. Reexamination of sole of left foot showed a pigmented infiltraling lesion. Pleural biopsy revealed pigmented tumour deposits. The patient was diagnosed to have fulminant metastatic malignant melanoma of left foot with metastasis to cervical lymph nodes and pleura. This case report re-emphasizes the importance of combined approach to ascertain diagnosis early.

  9. Melanoma therapy: Check the checkpoints.

    Science.gov (United States)

    Furue, Masutaka; Kadono, Takafumi

    2016-02-01

    Recent mutational and translational studies have revealed that the Ras/Raf/mitogen-activated protein kinase kinase (MEK)/extracellular signal-regulated kinase (ERK) pathway plays a key role in melanomagenesis. Mutations in NRAS and BRAF are found in the majority of melanomas resulting in the formation of constitutively active NRAS and BRAF molecules, which leads to the proliferation and survival of melanoma cells through the activation of MEK/ERK signals. Inhibitors of BRAF or MEK significantly extend the progression-free survival and overall survival of melanoma patients compared with conventional chemotherapies. Combining BRAF and MEK inhibitors further enhances the clinical effectiveness. Cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) is an immune checkpoint molecule that downregulates T-cell activation by binding to B7 (CD80/CD86) molecules on antigen-presenting cells. Programmed death receptor ligand 1 on melanoma cells negatively regulates T-cell function by binding to the programmed death-1 (PD-1) receptor on T cells. Antibodies against CTLA-4 and PD-1 also enhance the survival of melanoma patients. In this review, we summarize the clinical effectiveness and adverse events of the BRAF inhibitors, MEK inhibitors and anti-immune checkpoint antibodies in melanoma treatment.

  10. Reproducibility of self-reported melanoma risk factors in melanoma patients

    NARCIS (Netherlands)

    Waal, A.C. de; Rossum, M.M. van; Kiemeney, L.A.L.M.; Aben, K.K.H.

    2014-01-01

    As melanoma researchers continue to investigate environmental and lifestyle-related risk factors, questionnaire data remain important. The reproducibility of a questionnaire on melanoma risk factors was investigated using a test-retest approach in 389 Dutch melanoma patients. In 2011, 389 melanoma

  11. Reproducibility of self-reported melanoma risk factors in melanoma patients

    NARCIS (Netherlands)

    Waal, A.C. de; Rossum, M.M. van; Kiemeney, L.A.L.M.; Aben, K.K.H.

    2014-01-01

    As melanoma researchers continue to investigate environmental and lifestyle-related risk factors, questionnaire data remain important. The reproducibility of a questionnaire on melanoma risk factors was investigated using a test-retest approach in 389 Dutch melanoma patients. In 2011, 389 melanoma p

  12. Molecular Structure and Reactivity in the Pyrolysis of Aldehydes

    Science.gov (United States)

    Sias, Eric; Cole, Sarah; Sowards, John; Warner, Brian; Wright, Emily; McCunn, Laura R.

    2016-06-01

    The effect of alkyl chain structure on pyrolysis mechanisms has been investigated in a series of aldehydes. Isovaleraldehyde, CH_3CH(CH_3)CH_2CHO, and pivaldehyde, (CH_3)_3CCHO, were subject to thermal decomposition in a resistively heated SiC tubular reactor at 800-1200 °C. Matrix-isolation FTIR spectroscopy was used to identify pyrolysis products. Carbon monoxide and isobutene were major products from each of the aldehydes, which is consistent with what is known from previous studies of unbranched alkyl-chain aldehydes. Other products observed include vinyl alcohol, propene, acetylene, and ethylene, revealing complexities to be considered in the pyrolysis of large, branched-chain aldehydes.

  13. Silver-catalyzed synthesis of amides from amines and aldehydes

    Science.gov (United States)

    Madix, Robert J; Zhou, Ling; Xu, Bingjun; Friend, Cynthia M; Freyschlag, Cassandra G

    2014-11-18

    The invention provides a method for producing amides via the reaction of aldehydes and amines with oxygen adsorbed on a metallic silver or silver alloy catalyst. An exemplary reaction is shown in Scheme 1: (I), (II), (III). ##STR00001##

  14. Lanthanide dithiocarbamate complexes: efficient catalysts for the cyanosilylation of aldehydes

    OpenAIRE

    VALE, JULIANA A.; FAUSTINO, WAGNER M.; Menezes, Paulo H.; Sá,Gilberto F. de

    2006-01-01

    A new class of lanthanide dithiocarbamate complexes was used to promote the cyanosilylation of aldehydes at high yields at room temperature. This represents the first application of lanthanide dithiocarbamate acting as Lewis acid.

  15. The Reduction of Nitriles to Aldehydes: Applications of Raney Nickel ...

    African Journals Online (AJOL)

    NJD

    aSchool of Chemistry, University of the Witwatersrand, Johannesburg, P.O. Wits 2050, South Africa. bHonorary ... REVIEW ARTICLE. B. Staskun and T. van .... it was found that olefins, ketones, esters, aldehydes, amides, halo compounds and.

  16. 27 CFR 24.183 - Use of distillates containing aldehydes.

    Science.gov (United States)

    2010-04-01

    ... the fermentation of wine and then returned to the distilled spirits plant from which distillates were... fermentation of wine made from a different kind of fruit. Distillates containing aldehydes which are...

  17. Daidzin: a potent, selective inhibitor of human mitochondrial aldehyde dehydrogenase.

    OpenAIRE

    Keung, W M; Vallee, B L

    1993-01-01

    Human mitochondrial aldehyde dehydrogenase (ALDH-I) is potently, reversibly, and selectively inhibited by an isoflavone isolated from Radix puerariae and identified as daidzin, the 7-glucoside of 4',7-dihydroxyisoflavone. Kinetic analysis with formaldehyde as substrate reveals that daidzin inhibits ALDH-I competitively with respect to formaldehyde with a Ki of 40 nM, and uncompetitively with respect to the coenzyme NAD+. The human cytosolic aldehyde dehydrogenase isozyme (ALDH-II) is nearly 3...

  18. Modeling Melanoma In Vitro and In Vivo

    Directory of Open Access Journals (Sweden)

    Kimberley A. Beaumont

    2013-12-01

    Full Text Available The behavior of melanoma cells has traditionally been studied in vitro in two-dimensional cell culture with cells adhering to plastic dishes. However, in order to mimic the three-dimensional architecture of a melanoma, as well as its interactions with the tumor microenvironment, there has been the need for more physiologically relevant models. This has been achieved by designing 3D in vitro models of melanoma, such as melanoma spheroids embedded in extracellular matrix or organotypic skin reconstructs. In vivo melanoma models have typically relied on the growth of tumor xenografts in immunocompromised mice. Several genetically engineered mouse models have now been developed which allow the generation of spontaneous melanoma. Melanoma models have also been established in other species such as zebrafish, which are more conducive to imaging and high throughput studies. We will discuss these models as well as novel techniques that are relevant to the study of the molecular mechanisms underlying melanoma progression.

  19. Melanoma Biopsy Results Can Differ, Worrying Patients

    Science.gov (United States)

    ... page: https://medlineplus.gov/news/fullstory_166955.html Melanoma Biopsy Results Can Differ, Worrying Patients Doctor discovers ... her dermatologist said her skin biopsy indicated possible melanoma, she knew just what to do -- get a ...

  20. Tool to Distinguish Moles from Melanoma

    Science.gov (United States)

    “Moles to Melanoma: Recognizing the ABCDE Features” presents photos that show changes in individual pigmented lesions over time, and describes the different appearances of moles, dysplastic nevi, and melanomas.

  1. Isolated Malignant Melanoma Metastasis to the Pancreas

    Directory of Open Access Journals (Sweden)

    Anne K. Larsen, MD

    2013-11-01

    Full Text Available Summary: Malignant melanomas rarely develop isolated pancreatic metastases. We describe a unique patient who is still alive 22 years following an isolated pancreatic melanoma metastasis, and we review the sparse literature in the field.

  2. Amine-functionalized porous silicas as adsorbents for aldehyde abatement.

    Science.gov (United States)

    Nomura, Akihiro; Jones, Christopher W

    2013-06-26

    A series of aminopropyl-functionalized silicas containing of primary, secondary, or tertiary amines is fabricated via silane-grafting on mesoporous SBA-15 silica and the utility of each material in the adsorption of volatile aldehydes from air is systematically assessed. A particular emphasis is placed on low-molecular-weight aldehydes such as formaldehyde and acetaldehyde, which are highly problematic volatile organic compound (VOC) pollutants. The adsorption tests demonstrate that the aminosilica materials with primary amines most effectively adsorbed formaldehyde with an adsorption capacity of 1.4 mmolHCHO g(-1), whereas the aminosilica containing secondary amines showed lower adsorption capacity (0.80 mmolHCHO g(-1)) and the aminosilica containing tertiary amines adsorbed a negligible amount of formaldehyde. The primary amine containing silica also successfully abated higher aldehyde VOC pollutants, including acetaldehyde, hexanal, and benzaldehyde, by effectively adsorbing them. The adsorption mechanism is investigated by (13)C CP MAS solid-state NMR and FT-Raman spectroscopy, and it is demonstrated that the aldehydes are chemically attached to the surface of aminosilica in the form of imines and hemiaminals. The high aldehyde adsorption capacities of the primary aminosilicas in this study demonstrate the utility of amine-functionalized silica materials for reduction of gaseous aldehydes.

  3. Donor Transmission of Melanoma Following Renal Transplant

    Directory of Open Access Journals (Sweden)

    Kathryn T. Chen

    2012-01-01

    Full Text Available Donor transmission of melanoma is one of the more common and lethal of recipient malignancies, often presenting with systemic disease. Although some patients may receive durable remission of melanoma following explantation of the allograft and withdrawal of immunosuppression, donor transmission of melanoma is fatal in most patients. Here we present a case of a 44-year-old male who developed metastatic melanoma following renal transplant.

  4. Donor transmission of melanoma following renal transplant.

    Science.gov (United States)

    Chen, Kathryn T; Olszanski, Anthony; Farma, Jeffrey M

    2012-01-01

    Donor transmission of melanoma is one of the more common and lethal of recipient malignancies, often presenting with systemic disease. Although some patients may receive durable remission of melanoma following explantation of the allograft and withdrawal of immunosuppression, donor transmission of melanoma is fatal in most patients. Here we present a case of a 44-year-old male who developed metastatic melanoma following renal transplant.

  5. Isolated malignant melanoma metastasis to the pancreas

    DEFF Research Database (Denmark)

    Larsen, Anne K; Krag, Christen; Geertsen, Poul

    2013-01-01

    SUMMARY: Malignant melanomas rarely develop isolated pancreatic metastases. We describe a unique patient who is still alive 22 years following an isolated pancreatic melanoma metastasis, and we review the sparse literature in the field.......SUMMARY: Malignant melanomas rarely develop isolated pancreatic metastases. We describe a unique patient who is still alive 22 years following an isolated pancreatic melanoma metastasis, and we review the sparse literature in the field....

  6. Functional Erythropoietin Autocrine Loop in Melanoma

    OpenAIRE

    Kumar, Suresh M; Acs, Geza; Fang, Dong; Herlyn, Meenhard; Elder, David E.; Xu, Xiaowei

    2005-01-01

    Although erythropoietin (Epo) is a known stimulator of erythropoiesis, recent evidence suggests that its biological functions are not confined to hematopoietic cells. To elucidate the role of Epo and erythropoietin receptor (EpoR) in melanoma, we examined the expression and function of these proteins in melanocytes and melanoma cells. We found increased expression of Epo in melanoma cells compared to melanocyte in vitro. EpoR was also strongly expressed in all of the melanoma cell lines and t...

  7. Threshold responses in cinnamic-aldehyde-sensitive subjects: results and methodological aspects

    DEFF Research Database (Denmark)

    Johansen, J D; Andersen, Klaus Ejner; Rastogi, S C

    1996-01-01

    tests and 6-week graded use tests with 0.02, 0.1 and 0.8% cinnamic aldehyde in ethanol was studied in a group of cinnamic-aldehyde-sensitive eczema patients. The minimum effect level demonstrated was 0.02% cinnamic aldehyde on patch testing and 0.1% cinnamic aldehyde on use testing, which are allowed...... exposure information is needed to evaluate more fully the consequences of cinnamic aldehyde sensitivity....

  8. Surgical management of primary and recurrent melanoma.

    Science.gov (United States)

    Farma, Jeffrey M; Kulkarni, Nandini; Hsu, Cary

    2015-04-01

    Melanoma accounts for less than 2% of skin cancer cases but causes most skin cancer-related deaths. Surgery continues to be the cornerstone of treatment of melanoma and surgical principles are guided by data derived from clinical research. This article examines the evolution of surgical techniques for the diagnosis and treatment of primary and locally recurrent melanoma.

  9. Pregnancy and early-stage melanoma

    NARCIS (Netherlands)

    Daryanani, D; Plukker, JT; De Hullu, JA; Kuiper, H; Nap, RE; Hoekstra, HJ

    2003-01-01

    BACKGROUND. Cutaneous melanomas are aggressive tumors with an unpredictable biologic behavior. It has been suggested that women who present with melanoma during pregnancy have a worse prognosis due to more aggressive behavior of the melanoma. The objective of the current study was to evaluate the lo

  10. Clinicopathological and molecular aspects of cutaneous Melanoma

    NARCIS (Netherlands)

    Bogenrieder, T.

    2009-01-01

    Clinicopathological and molecular aspects of cutaneous melanoma. Melanoma arises form the transformation of neural crest-derived melanocytes, the pigment cells of the skin, which reside in the basal layer of the epidermis. Melanoma is the deadliest form of skin cancer and one of the most aggressive

  11. Malignant melanoma of the foot and ankle.

    Science.gov (United States)

    John, K J; Hayes, D W; Green, D R; Dickerson, J

    2000-04-01

    Malignant melanoma is a serious and devastating skin disease that podiatrists may be called upon to treat. It is pertinent that delays in diagnosis and treatment of malignant melanoma be avoided. Some of the topics discussed in this article are causes, clinical features, classification, and treatment of malignant melanoma, focusing on the foot and ankle.

  12. Coffee, tea and melanoma risk

    DEFF Research Database (Denmark)

    Caini, Saverio; Masala, Giovanna; Saieva, Calogero

    2017-01-01

    In vitro and animal studies suggest that bioactive constituents of coffee and tea may have anticarcinogenic effects against cutaneous melanoma; however, epidemiological evidence is limited to date. We examined the relationships between coffee (total, caffeinated or decaffeinated) and tea consumpt......In vitro and animal studies suggest that bioactive constituents of coffee and tea may have anticarcinogenic effects against cutaneous melanoma; however, epidemiological evidence is limited to date. We examined the relationships between coffee (total, caffeinated or decaffeinated) and tea...... consumption and risk of melanoma in the European Prospective Investigation into Cancer and Nutrition (EPIC). EPIC is a multicentre prospective study that enrolled over 500,000 participants aged 25-70 years from ten European countries in 1992-2000. Information on coffee and tea drinking was collected...... at baseline using validated country-specific dietary questionnaires. We used adjusted Cox proportional hazards regression models to calculate hazard ratios (HR) and 95% confidence intervals (95% CI) for the associations between coffee and tea consumption and melanoma risk. Overall, 2,712 melanoma cases were...

  13. Role of reduced lipoic acid in the redox regulation of mitochondrial aldehyde dehydrogenase (ALDH-2) activity. Implications for mitochondrial oxidative stress and nitrate tolerance.

    Science.gov (United States)

    Wenzel, Philip; Hink, Ulrich; Oelze, Matthias; Schuppan, Swaantje; Schaeuble, Karin; Schildknecht, Stefan; Ho, Kwok K; Weiner, Henry; Bachschmid, Markus; Münzel, Thomas; Daiber, Andreas

    2007-01-05

    Chronic therapy with nitroglycerin results in a rapid development of nitrate tolerance, which is associated with an increased production of reactive oxygen species. We have recently shown that mitochondria are an important source of nitroglycerin-induced oxidants and that the nitroglycerin-bioactivating mitochondrial aldehyde dehydrogenase is oxidatively inactivated in the setting of tolerance. Here we investigated the effect of various oxidants on aldehyde dehydrogenase activity and its restoration by dihydrolipoic acid. In vivo tolerance in Wistar rats was induced by infusion of nitroglycerin (6.6 microg/kg/min, 4 days). Vascular reactivity was measured by isometric tension studies of isolated aortic rings in response to nitroglycerin. Chronic nitroglycerin infusion lead to impaired vascular responses to nitroglycerin and decreased dehydrogenase activity, which was corrected by dihydrolipoic acid co-incubation. Superoxide, peroxynitrite, and nitroglycerin itself were highly efficient in inhibiting mitochondrial and yeast aldehyde dehydrogenase activity, which was restored by dithiol compounds such as dihydrolipoic acid and dithiothreitol. Hydrogen peroxide and nitric oxide were rather insensitive inhibitors. Our observations indicate that mitochondrial oxidative stress (especially superoxide and peroxynitrite) in response to organic nitrate treatment may inactivate aldehyde dehydrogenase thereby leading to nitrate tolerance. Glutathionylation obviously amplifies oxidative inactivation of the enzyme providing another regulatory pathway. Furthermore, the present data demonstrate that the mitochondrial dithiol compound dihydrolipoic acid restores mitochondrial aldehyde dehydrogenase activity via reduction of a disulfide at the active site and thereby improves nitrate tolerance.

  14. BRAF V600E-dependent role of autophagy in uveal melanoma.

    Science.gov (United States)

    Zhao, Yinu; Wang, Weibin; Min, Irene; Wyrwas, Brian; Moore, Maureen; Zarnegar, Rasa; Fahey, Thomas J

    2017-03-01

    Autophagy can function in a dual role in cancer development and progression: It can be cytoprotective or contribute to cell death. Therefore, determining the contextual role of autophagy between these two opposing effects is important. So far, little is known about the role of autophagy in uveal melanoma. In the present study, we looked to investigate the autophagic process, as well as its effect on cell survival in uveal melanoma cell lines under stressed conditions (starvation). The possible role of autophagy during BRAF inhibition in uveal melanoma was also sought. Two human uveal melanoma cell lines, OCM1A, which harbors the BRAF mutation V600E and Mel 290, which is BRAF wild type, were studied. Autophagy levels were determined by Western blot assay with/without the addition of autophagic flux inhibitor (bafilomycin A1). Cell proliferation was assessed by an MTT assay. Starvation triggered autophagy in BRAF V600E-mutant OCM1A cells but not in BRAF wild-type Mel 290 cells. Enhanced autophagy helped the OCM1A cells survive under stressed conditions. The BRAF inhibitor vemurafenib upregulated autophagy through suppression of the PI3K/Akt/mTOR/p70S6 K pathway in BRAF V600E-mutant uveal melanoma cells. Autophagy inhibition impaired the treatment efficacy of vemurafenib in BRAF V600E-mutant uveal melanoma cells. Our data demonstrate that starvation-trigged autophagy, which is BRAF V600E dependent, promotes cancer cell survival in uveal melanoma. Vemurafenib induces autophagic cell death rather than adaptive cell survival in BRAF V600E-mutant melanoma.

  15. Melanoma: Last call for radiotherapy.

    Science.gov (United States)

    Espenel, Sophie; Vallard, Alexis; Rancoule, Chloé; Garcia, Max-Adrien; Guy, Jean-Baptiste; Chargari, Cyrus; Deutsch, Eric; Magné, Nicolas

    2017-02-01

    Melanoma is traditionally considered to be a radioresistant tumor. However, radiotherapy and immunotherapy latest developments might upset this radiobiological dogma. Stereotactic radiotherapy allows high dose per fraction delivery, with high dose rate. More DNA lethal damages, less sublethal damages reparation, endothelial cell apoptosis, and finally clonogenic cell dysfunction are produced, resulting in improved local control. Radiotherapy can also enhance immune responses, inducing neoantigens formation, tumor antigen presentation, and cytokines release. A synergic effect of radiotherapy with immunotherapy is expected, and might lead to abscopal effects. If hadrontherapy biological properties seem able to suppress hypoxia-induced radioresistance and increase biological efficacy, ballistic advantages over photon radiations might also improve radiotherapy outcomes on usually poor prognosis locations. The present review addresses biological and clinical effects of high fraction dose, bystander effect, abscopal effect, and hadrontherapy features in melanoma. Clinical trials results are warranted to establish indications of innovative radiotherapy in melanoma.

  16. Prognostic stratification of ulcerated melanoma

    DEFF Research Database (Denmark)

    Bønnelykke-Behrndtz, Marie L; Schmidt, Henrik; Christensen, Ib J

    2014-01-01

    OBJECTIVES: For patients with melanoma, ulceration is an important prognostic marker and interestingly also a predictive marker for the response of adjuvant interferon. A consensual definition and accurate assessment of ulceration are therefore crucial for proper staging and clinical management. We...... stratification of ulcerated lesions. METHODS: From H&E-stained sections, the status (presence vs absence), extent (percentage of the total tumor length), and type (infiltrative vs attenuative) of ulceration and epidermal involvement were evaluated from 385 patients with cutaneous melanoma. RESULTS: The presence...... of ulceration (hazard ratio [HR], 1.83), an attenuative type of ulceration (HR, 3.02), and excessive ulceration (HR, 3.57) were independent predictors of poor melanoma-specific survival. Further subdivision of minimal/moderate ulceration showed independent prognostic value only for lesions with epidermal...

  17. Platelet-Derived Growth Factor-Receptor α Strongly Inhibits Melanoma Growth In Vitro and In Vivo1

    Science.gov (United States)

    Faraone, Debora; Aguzzi, Maria Simona; Toietta, Gabriele; Facchiano, Angelo M; Facchiano, Francesco; Magenta, Alessandra; Martelli, Fabio; Truffa, Silvia; Cesareo, Eleonora; Ribatti, Domenico; Capogrossi, Maurizio C; Facchiano, Antonio

    2009-01-01

    Cutaneous melanoma is the most aggressive skin cancer; it is highly metastatic and responds poorly to current therapies. The expression of platelet-derived growth factor receptors (PDGF-Rs) is reported to be reduced in metastatic melanoma compared with benign nevi or normal skin; we then hypothesized that PDGF-Rα may control growth of melanoma cells. We show here that melanoma cells overexpressing PDGF-Rα respond to serum with a significantly lower proliferation compared with that of controls. Apoptosis, cell cycle arrest, pRb dephosphorylation, and DNA synthesis inhibition were also observed in cells overexpressing PDGF-Rα. Proliferation was rescued by PDGF-Rα inhibitors, allowing to exclude nonspecific toxic effects and indicating that PDGF-Rα mediates autocrine antiproliferation signals in melanoma cells. Accordingly, PDGF-Rα was found to mediate staurosporine cytotoxicity. A protein array-based analysis of the mitogen-activated protein kinase pathway revealed that melanoma cells overexpressing PDGF-Rα show a strong reduction of c-Jun phosphorylated in serine 63 and of protein phosphatase 2A/Bα and a marked increase of p38γ, mitogen-activated protein kinase kinase 3, and signal regulatory protein α1 protein expression. In a mouse model of primary melanoma growth, infection with the Ad-vector overexpressing PDGF-Rα reached a significant 70% inhibition of primary melanoma growth (P < .001) and a similar inhibition of tumor angiogenesis. All together, these data demonstrate that PDGF-Rα strongly impairs melanoma growth likely through autocrine mechanisms and indicate a novel endogenous mechanism involved in melanoma control. PMID:19649203

  18. Platelet-Derived Growth Factor-Receptor α Strongly Inhibits Melanoma Growth In Vitro and In Vivo

    Directory of Open Access Journals (Sweden)

    Debora Faraone

    2009-08-01

    Full Text Available Cutaneous melanoma is the most aggressive skin cancer; it is highly metastatic and responds poorly to current therapies. The expression of platelet-derived growth factor receptors (PDGF-Rs is reported to be reduced in metastatic melanoma compared with benign nevi or normal skin; we then hypothesized that PDGF-Rα may control growth of melanoma cells. We show here that melanoma cells overexpressing PDGF-Rα respond to serum with a significantly lower proliferation compared with that of controls. Apoptosis, cell cycle arrest, pRb dephosphorylation, and DNA synthesis inhibition were also observed in cells overexpressing PDGF-Rα. Proliferation was rescued by PDGF-Rα inhibitors, allowing to exclude nonspecific toxic effects and indicating that PDGF-Rα mediates autocrine antiproliferation signals in melanoma cells. Accordingly, PDGF-Rα was found to mediate staurosporine cytotoxicity. A protein array-based analysis of the mitogen-activated protein kinase pathway revealed that melanoma cells overexpressing PDGF-Rα show a strong reduction of c-Jun phosphorylated in serine 63 and of protein phosphatase 2A/Bα and a marked increase of p38γ, mitogen-activated protein kinase kinase 3, and signal regulatory protein α1 protein expression. In a mouse model of primary melanoma growth, infection with the Ad-vector overexpressing PDGF-Rα reached a significant 70% inhibition of primary melanoma growth (P < .001 and a similar inhibition of tumor angiogenesis. All together, these data demonstrate that PDGF-Rα strongly impairs melanoma growth likely through autocrine mechanisms and indicate a novel endogenous mechanism involved in melanoma control.

  19. Melanoma: oncogenic drivers and the immune system

    Science.gov (United States)

    Karachaliou, Niki; Pilotto, Sara; Teixidó, Cristina; Viteri, Santiago; González-Cao, María; Riso, Aldo; Morales-Espinosa, Daniela; Molina, Miguel Angel; Chaib, Imane; Santarpia, Mariacarmela; Richardet, Eduardo; Bria, Emilio

    2015-01-01

    Advances and in-depth understanding of the biology of melanoma over the past 30 years have contributed to a change in the consideration of melanoma as one of the most therapy-resistant malignancies. The finding that oncogenic BRAF mutations drive tumor growth in up to 50% of melanomas led to a molecular therapy revolution for unresectable and metastatic disease. Moving beyond BRAF, inactivation of immune regulatory checkpoints that limit T cell responses to melanoma has provided targets for cancer immunotherapy. In this review, we discuss the molecular biology of melanoma and we focus on the recent advances of molecularly targeted and immunotherapeutic approaches. PMID:26605311

  20. Genetic alterations and markers of melanoma

    Directory of Open Access Journals (Sweden)

    N. N. Mazurenko

    2014-01-01

    Full Text Available Melanoma remains the most deadly form of malignant skin disease with high risk of metastases. Metastatic melanoma is prognostic highly unfavorable and resistant to traditional chemotherapy and biologic treatment. There is a great progress in understanding of the molecular mechanisms underlying melanoma initiation and progression. The external (ultraviolet irradiation and internal (genetic factors are involved in melanoma genesis. 5–14 % of melanoma cases occur in familial context due to genetic predisposition risk factors. Among them rare germinal mutations in the cell cycle genes regulators CDKN2A and CDK4 and in the master gene of melanocyte homeostasis MITF, as well as single nucleotide polymorphisms of several low-penetrated genes, namely MC1R, have been identified. The main cell signaling pathways and oncogene driver mutations are involved in melanoma pathogenesis. RAS / RAF / MEK / ERK cascade is hyperactivated in 75 % of cutaneous melanoma cases. Activation of PI3K / AKT / mTOR signaling pathway is important for melanoma progression. Recent studies revealed that melanomas are genetically and phenotypically heterogeneous tumors. Spectrum of chromosomal alterations and activating mutations corresponding to tumor molecular portraits varies in melanomas of different location. Most of cutaneous melanomas contain BRAF (50 % or NRAS (20 % mutations, and NRAS mutations occur on chronically sun-exposed skin. Activating KIT mutations have been reported in approximately 20–30 % of certain subtypes of melanoma, including acral and mucosal, and melanoma that develop on photodamaged skin. Cutaneous metastatic melanoma derive from preexisting nevi in 25 % of cases, molecular mechanisms of nevi malignization are discussed. Deepsequencing approaches of melanoma samples of different melanoma types highlighted new melanoma driver genes, that are damaged due to tumorigenic effects of ultraviolet: PPP6C, RAC1, SNX31, TACC1 and STK19. The

  1. Cutavirus in Cutaneous Malignant Melanoma

    DEFF Research Database (Denmark)

    Mollerup, Sarah; Fridholm, Helena; Vinner, Lasse

    2017-01-01

    A novel human protoparvovirus related to human bufavirus and preliminarily named cutavirus has been discovered. We detected cutavirus in a sample of cutaneous malignant melanoma by using viral enrichment and high-throughput sequencing. The role of cutaviruses in cutaneous cancers remains to be in......A novel human protoparvovirus related to human bufavirus and preliminarily named cutavirus has been discovered. We detected cutavirus in a sample of cutaneous malignant melanoma by using viral enrichment and high-throughput sequencing. The role of cutaviruses in cutaneous cancers remains...

  2. Cutavirus in Cutaneous Malignant Melanoma

    DEFF Research Database (Denmark)

    Mollerup, Sarah; Fridholm, Helena; Vinner, Lasse

    2017-01-01

    A novel human protoparvovirus related to human bufavirus and preliminarily named cutavirus has been discovered. We detected cutavirus in a sample of cutaneous malignant melanoma by using viral enrichment and high-throughput sequencing. The role of cutaviruses in cutaneous cancers remains to be in......A novel human protoparvovirus related to human bufavirus and preliminarily named cutavirus has been discovered. We detected cutavirus in a sample of cutaneous malignant melanoma by using viral enrichment and high-throughput sequencing. The role of cutaviruses in cutaneous cancers remains...

  3. Mucosal malignant melanoma - a clinical, oncological, pathological and genetic survey

    DEFF Research Database (Denmark)

    Mikkelsen, Lauge H; Larsen, Ann-Cathrine; von Buchwald, Christian

    2016-01-01

    melanoma must be excluded. Mutations in KIT are frequently found, while BRAF and NRAS mutations are rarely found - except in conjunctival melanomas that carry BRAF mutations. Mutations in the TERT promotor region are also found in mucosal melanomas. Complete surgical resection with free margins......Mucosal melanomas constitute 1.3% of all melanomas and they may develop in any mucosal membrane. Conjunctival melanomas (0.5/million/year) and melanomas in the sinonasal cavity (0.5/million/year) are the most common, followed by anorectal melanomas (0.4/million/year) and melanomas in the oral...... cavity (0.2/million/year). Anorectal melanoma occurs slightly more often in females, whereas oral melanoma has a male predilection. Mucosal melanoma most commonly develops in a patient's sixth or seventh decade of life, and no differences between races have been found except for sinonasal melanoma...

  4. A diatom gene regulating nitric-oxide signaling and susceptibility to diatom-derived aldehydes.

    Science.gov (United States)

    Vardi, Assaf; Bidle, Kay D; Kwityn, Clifford; Hirsh, Donald J; Thompson, Stephanie M; Callow, James A; Falkowski, Paul; Bowler, Chris

    2008-06-24

    Diatoms are unicellular phytoplankton accounting for approximately 40% of global marine primary productivity [1], yet the molecular mechanisms underlying their ecological success are largely unexplored. We use a functional-genomics approach in the marine diatom Phaeodactylum tricornutum to characterize a novel protein belonging to the widely conserved YqeH subfamily [2] of GTP-binding proteins thought to play a role in ribosome biogenesis [3], sporulation [4], and nitric oxide (NO) generation [5]. Transgenic diatoms overexpressing this gene, designated PtNOA, displayed higher NO production, reduced growth, impaired photosynthetic efficiency, and a reduced ability to adhere to surfaces. A fused YFP-PtNOA protein was plastid localized, distinguishing it from a mitochondria-localized plant ortholog. PtNOA was upregulated in response to the diatom-derived unsaturated aldehyde 2E,4E/Z-decadienal (DD), a molecule previously shown to regulate intercellular signaling, stress surveillance [6], and defense against grazers [7]. Overexpressing cell lines were hypersensitive to sublethal levels of this aldehyde, manifested by altered expression of superoxide dismutase and metacaspases, key components of stress and death pathways [8, 9]. NOA-like sequences were found in diverse oceanic regions, suggesting that a novel NO-based system operates in diatoms and may be widespread in phytoplankton, providing a biological context for NO in the upper ocean [10].

  5. Melanoma early detection and awareness

    DEFF Research Database (Denmark)

    Wainstein, Alberto; Algarra, Salvador Martin; Bastholt, Lars

    2014-01-01

    Risk factors for melanoma are well known and have guided plans for primary and secondary prevention. The presentation of the disease, however, varies widely depending on the geographic area, ethnicity, and socioeconomic status. For this reason, many countries have developed specific strategies...

  6. Visual Impairment

    Science.gov (United States)

    ... Surgery? Choosing the Right Sport for You Shyness Visual Impairment KidsHealth > For Teens > Visual Impairment Print A A ... with the brain, making vision impossible. What Is Visual Impairment? Many people have some type of visual problem ...

  7. Access to nitriles from aldehydes mediated by an oxoammonium salt.

    Science.gov (United States)

    Kelly, Christopher B; Lambert, Kyle M; Mercadante, Michael A; Ovian, John M; Bailey, William F; Leadbeater, Nicholas E

    2015-03-27

    A scalable, high yielding, rapid route to access an array of nitriles from aldehydes mediated by an oxoammonium salt (4-acetylamino-2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate) and hexamethyldisilazane (HMDS) as an ammonia surrogate has been developed. The reaction likely involves two distinct chemical transformations: reversible silyl-imine formation between HMDS and an aldehyde, followed by oxidation mediated by the oxoammonium salt and desilylation to furnish a nitrile. The spent oxidant can be easily recovered and used to regenerate the oxoammonium salt oxidant. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  8. Intercellular crosstalk in human malignant melanoma.

    Science.gov (United States)

    Dvořánková, Barbora; Szabo, Pavol; Kodet, Ondřej; Strnad, Hynek; Kolář, Michal; Lacina, Lukáš; Krejčí, Eliška; Naňka, Ondřej; Šedo, Aleksi; Smetana, Karel

    2017-05-01

    Incidence of malignant melanoma is increasing globally. While the initial stages of tumors can be easily treated by a simple surgery, the therapy of advanced stages is rather limited. Melanoma cells spread rapidly through the body of a patient to form multiple metastases. Consequently, the survival rate is poor. Therefore, emphasis in melanoma research is given on early diagnosis and development of novel and more potent therapeutic options. The malignant melanoma is arising from melanocytes, cells protecting mitotically active keratinocytes against damage caused by UV light irradiation. The melanocytes originate in the neural crest and consequently migrate to the epidermis. The relationship between the melanoma cells, the melanocytes, and neural crest stem cells manifests when the melanoma cells are implanted to an early embryo: they use similar migratory routes as the normal neural crest cells. Moreover, malignant potential of these melanoma cells is overdriven in this experimental model, probably due to microenvironmental reprogramming. This observation demonstrates the crucial role of the microenvironment in melanoma biology. Indeed, malignant tumors in general represent complex ecosystems, where multiple cell types influence the growth of genetically mutated cancer cells. This concept is directly applicable to the malignant melanoma. Our review article focuses on possible strategies to modify the intercellular crosstalk in melanoma that can be employed for therapeutic purposes.

  9. Isolation of tumorigenic circulating melanoma cells

    Science.gov (United States)

    Ma, Jie; Lin, Jennifer Y.; Alloo, Allireza; Wilson, Brian J.; Schatton, Tobias; Zhan, Qian; Murphy, George F.; Waaga-Gasser, Ana-Maria; Gasser, Martin; Hodi, F. Stephen; Frank, Natasha Y.; Frank, Markus H.

    2010-01-01

    Circulating tumor cells (CTC) have been identified in several human malignancies, including malignant melanoma. However, whether melanoma CTC are tumorigenic and cause metastatic progression is currently unknown. Here we isolate for the first time viable tumorigenic melanoma CTC and demonstrate that this cell population is capable of metastasis formation in human-to-mouse xenotransplantation experiments. The presence of CTC among peripheral blood mononuclear cells (PBMC) of murine recipients of subcutaneous (s.c.) human melanoma xenografts could be detected based on mRNA expression for human GAPDH and/or ATP-binding cassette subfamily B member 5 (ABCB5), a marker of malignant melanoma-initiating cells previously shown to be associated with metastatic disease progression in human patients. ABCB5 expression could also be detected in PBMC preparations from human stage IV melanoma patients but not healthy controls. The detection of melanoma CTC in human-to-mouse s.c. tumor xenotransplantation models correlated significantly with pulmonary metastasis formation. Moreover, prospectively isolated CTC from murine recipients of s.c. melanoma xenografts were capable of primary tumor initiation and caused metastasis formation upon xenotransplantation to secondary murine NOD-scid IL2Rγnull recipients. Our results provide initial evidence that melanoma CTC are tumorigenic and demonstrate that CTC are capable of causing metastatic tumor progression. These findings suggest a need for CTC eradication to inhibit metastatic progression and provide a rationale for assessment of therapeutic responses of this tumorigenic cell population to promising emerging melanoma treatment modalities. PMID:20977885

  10. Risk factors for second primary melanoma among Dutch patients with melanoma

    NARCIS (Netherlands)

    Schuurman, M.S.; Waal, A.C. de; Thijs, E.J.M.; Rossum, M.M. van; Kiemeney, L.A.L.M.; Aben, K.K.H.

    2017-01-01

    BACKGROUND: Patients with melanoma are at increased risk of developing subsequent primary melanomas. Knowledge about risk factors for these subsequent primaries is scarce. More evidence may help clinicians in tailoring surveillance schedules by selecting patients who could benefit from intensified

  11. Tyrosinase expression in malignant melanoma, desmoplastic melanoma, and peripheral nerve tumors

    DEFF Research Database (Denmark)

    Boyle, Jenny L; Haupt, Helen M; Stern, Jere B

    2002-01-01

    CONTEXT: Pathologists may encounter problems in the differential diagnosis of malignant melanoma, spindle and epithelioid neoplasms of peripheral nerves, and fibrohistiocytic tumors. Tyrosinase has been demonstrated to be a sensitive marker for melanoma. OBJECTIVE: To determine the specificity of...

  12. miR-203 inhibits melanoma invasive and proliferative abilities by targeting the polycomb group gene BMI1

    Energy Technology Data Exchange (ETDEWEB)

    Chang, Xiao [Department of Dermatology and Venereal Disease, Xuanwu Hospital, Capital Medical University, Beijing 100053 (China); Sun, Yong [Department of Burn and Plastic Surgery, Huai’an First People’s Hospital, Nanjing Medical University, Huai’an 223300 (China); Han, Siqi [Department of Medical Oncology, Jinling Hospital, Nanjing 210002 (China); Zhu, Wei [Department of Dermatology and Venereal Disease, Xuanwu Hospital, Capital Medical University, Beijing 100053 (China); Zhang, Haiping, E-mail: zhanghaiping_2000@163.com [Department of Dermatology and Venereal Disease, Xuanwu Hospital, Capital Medical University, Beijing 100053 (China); Lian, Shi, E-mail: lianshi_2020@163.com [Department of Dermatology and Venereal Disease, Capital Medical University, Beijing 100069 (China)

    2015-01-02

    Highlights: • First reported deregulation of miR-203 and up-regulation of BMI1 in metastatic melanoma. • miR-203 decreased BMI1 expression by directly binding to 3′UTR. • Further found miR-203 overexpression suppressed cell invasion and stemness. • Re-expression of BMI1 rescued miR-203-mediated suppression. • miR-203-BMI1 axis may be potential therapeutic targets of melanoma metastasis. - Abstract: Metastasis is the major problem in malignant melanoma, posing a therapeutic challenge to clinicians. The investigation of the underlying mechanism driving this progress remains a large unmet need. In this study, we revealed a miR-203-BMI1 axis that regulated melanoma metastasis. We found significantly deregulation of miR-203 and up-regulation of BMI1 in melanoma, particularly in metastatic melanoma. An inverse correlation between the levels of miR-203 and BMI1 was further observed in melanoma tissues and cell lines. We also identified BMI1 as a downstream target gene of miR-203, which bound to the 3′UTR of BMI1. Overexpression of miR-203 was associated with decreased BMI1 expression and impaired cell invasion and tumor sphere formation activities. Re-expression of BMI1 markedly rescued miR-203-mediated suppression of these events. Taken together, our results demonstrated that miR-203 regulated melanoma invasive and proliferative abilities in part by targeting BMI1, providing new insights into potential mechanisms of melanoma metastasis.

  13. The genomic landscape of cutaneous melanoma.

    Science.gov (United States)

    Zhang, Tongwu; Dutton-Regester, Ken; Brown, Kevin M; Hayward, Nicholas K

    2016-05-01

    Somatic mutation analysis of melanoma has been performed at the single gene level extensively over the past several decades. This has provided considerable insight into the critical pathways controlling melanoma initiation and progression. During the last 5 yr, next-generation sequencing (NGS) has enabled even more comprehensive mutational screening at the level of multigene panels, exomes and genomes. These studies have uncovered many new and unexpected players in melanoma development. The recent landmark study from The Cancer Genome Atlas (TCGA) consortium describing the genomic architecture of 333 cutaneous melanomas provides the largest and broadest analysis to date on the somatic aberrations underlying melanoma genesis. It thus seems timely to review the mutational landscape of melanoma and highlight the key genes and cellular pathways that appear to drive this cancer.

  14. Molecular insights into melanoma brain metastases.

    Science.gov (United States)

    Westphal, Dana; Glitza Oliva, Isabella C; Niessner, Heike

    2017-06-01

    Substantial proportions of patients with metastatic melanoma develop brain metastases during the course of their disease, often resulting in significant morbidity and death. Despite recent advances with BRAF/MEK and immune-checkpoint inhibitors in the treatment of patients who have melanoma with extracerebral metastases, patients who have melanoma brain metastases still have poor overall survival, highlighting the need for further therapy options. A deeper understanding of the molecular pathways involved in the development of melanoma brain metastases is required to develop more brain-specific therapies. Here, the authors summarize the currently known preclinical data and describe steps involved in the development of melanoma brain metastases. Only by knowing the molecular background is it possible to design new therapeutic agents that can be used to improve the outcome of patients with melanoma brain metastases. Cancer 2017;123:2163-75. © 2017 American Cancer Society. © 2017 American Cancer Society.

  15. Melanoma-specific marker expression in skin biopsy tissues as a tool to facilitate melanoma diagnosis.

    Science.gov (United States)

    Alexandrescu, Doru T; Kauffman, C Lisa; Jatkoe, Timothy A; Hartmann, Dan P; Vener, Tatiana; Wang, Haiying; Derecho, Carlo; Rajpurohit, Yashoda; Wang, Yixin; Palma, John F

    2010-07-01

    Diagnosis of cutaneous melanoma requires accurate differentiation of true malignant tumors from highly atypical lesions, which lack the capacity to develop uncontrolled proliferation and to metastasize. We used melanoma markers from previous work to differentiate benign and atypical lesions from melanoma using paraffin-embedded tissue. This critical step in diagnosis generates the most uncertainty and discrepancy between dermatopathologists. A total of 193 biopsy tissues were selected: 47 melanomas, 48 benign nevi, and 98 atypical/suspicious, including 48 atypical nevi and 50 melanomas as later assigned by expert dermatopathologists. Performance for SILV, GDF15, and L1CAM normalized to TYR in unequivocal melanoma versus benign nevi resulted in an area under the curve (AUC) of 0.94, 0.67, and 0.5, respectively. SILV also differentiated atypical cases classified as melanoma from atypical nevi with an AUC=0.74. Furthermore, SILV showed a significant difference between suspicious melanoma and each suspicious atypia group: melanoma versus severe atypia and melanoma versus moderate atypia had P-values of 0.0077 and 0.0009, respectively. SILV showed clear discrimination between melanoma and benign unequivocal cases as well as between different atypia subgroups in the group of suspicious samples. The role and potential utility of this molecular assay as an adjunct to the morphological diagnosis of melanoma are discussed.

  16. Cyclodextrin Aldehydes are Oxidase Mimics

    DEFF Research Database (Denmark)

    Fenger, Thomas Hauch; Bjerre, Jeannette; Bols, Mikael

    2009-01-01

    Cyclodextrins containing 6-aldehyde groups were found to catalyse oxidation of aminophenols in the presence of hydrogen peroxide. The catalysis followed Michaelis-Menten kinetics and is related to the catalysis previously observed with cyclodextrin ketones. A range of different cyclodextrin...

  17. Molybdenum incorporation in tungsten aldehyde oxidoreductase enzymes from Pyrococcus furiosus

    NARCIS (Netherlands)

    Sevcenco, A.M; Bevers, L.E.; Pinkse, M.W.H.; Krijger, G.C.; Wolterbeek, H.T.; Verhaert, P.D.E.M.; Hagen, W.R.; Hagedoorn, P.L.

    2010-01-01

    The hyperthermophilic archaeon Pyrococcus furiosus expresses five aldehyde oxidoreductase (AOR) enzymes, all containing a tungsto-bispterin cofactor. The growth of this organism is fully dependent on the presence of tungsten in the growth medium. Previous studies have suggested that molybdenum is no

  18. Acetic acid assisted cobalt methanesulfonate catalysed chemoselective diacetylation of aldehydes

    Institute of Scientific and Technical Information of China (English)

    Min Wang; Zhi Guo Song; Hong Gong; Heng Jiang

    2008-01-01

    Cobalt methanesulfonate in combination with acetic acid catalysed the chemoselective diacetylation of aldehyde with acetic anhydride at room temperature under solvent free conditions. After reaction, cobalt methanesulfonate can be easily recovered and mused many times. The reaction was mild and efficient with good to high yields.

  19. Direct acylation of aryl bromides with aldehydes by palladium catalysis.

    Science.gov (United States)

    Ruan, Jiwu; Saidi, Ourida; Iggo, Jonathan A; Xiao, Jianliang

    2008-08-13

    A new protocol for the direct acylation of aryl bromides with aldehydes is established. It appears to involve palladium-amine cooperative catalysis, affording synthetically important alkyl aryl ketones in moderate to excellent yields in a straightforward manner, and broadening the scope of metal-catalyzed coupling reactions.

  20. Copepod reproduction is unaffected by diatom aldehydes or lipid composition

    DEFF Research Database (Denmark)

    Dutz, Jörg; Koski, Marja; Jonasdottir, Sigrun

    2008-01-01

    production of Temora longicornis were measured for six different diatom species as well as for a nondiatom control diet (Rhodomonas sp.). The experiments were accompanied by determinations of fatty acids, sterols, and polyunsaturated aldehydes (PUA) in the food. Although diatoms were generally ingested...

  1. Reaction of benzoxasilocines with aromatic aldehydes: Synthesis of homopterocarpans

    Directory of Open Access Journals (Sweden)

    Rodríguez-García Ignacio

    2007-02-01

    Full Text Available Abstract Condensation of 2H-benzo[g][1,2]oxasilocines with aromatic aldehydes in the presence of boron trifluoride affords mixtures of cis/trans 2-phenyl-3-vinylchromans with moderate yields. These can be transformed into homopterocarpans, a synthetic group of substances homologous to the natural isoflavonoid pterocarpans.

  2. Molybdenum incorporation in tungsten aldehyde oxidoreductase enzymes from Pyrococcus furiosus

    NARCIS (Netherlands)

    Sevcenco, A.M; Bevers, L.E.; Pinkse, M.W.H.; Krijger, G.C.; Wolterbeek, H.T.; Verhaert, P.D.E.M.; Hagen, W.R.; Hagedoorn, P.L.

    2010-01-01

    The hyperthermophilic archaeon Pyrococcus furiosus expresses five aldehyde oxidoreductase (AOR) enzymes, all containing a tungsto-bispterin cofactor. The growth of this organism is fully dependent on the presence of tungsten in the growth medium. Previous studies have suggested that molybdenum is no

  3. INTERACTION OF ALDEHYDES DERIVED FROM LIPID PEROXIDATION AND MEMBRANE PROTEINS.

    Directory of Open Access Journals (Sweden)

    Stefania ePizzimenti

    2013-09-01

    Full Text Available A great variety of compounds are formed during lipid peroxidation of polyunsaturated fatty acids of membrane phospholipids. Among them, bioactive aldehydes, such as 4-hydroxyalkenals, malondialdehyde (MDA and acrolein, have received particular attention since they have been considered as toxic messengers that can propagate and amplify oxidative injury. In the 4-hydroxyalkenal class, 4-hydroxy-2-nonenal (HNE is the most intensively studied aldehyde, in relation not only to its toxic function, but also to its physiological role. Indeed, HNE can be found at low concentrations in human tissues and plasma and participates in the control of biological processes, such as signal transduction, cell proliferation and differentiation. Moreover, at low doses, HNE exerts an anti-cancer effect, by inhibiting cell proliferation, angiogenesis, cell adhesion and by inducing differentiation and/or apoptosis in various tumor cell lines. It is very likely that a substantial fraction of the effects observed in cellular responses, induced by HNE and related aldehydes, be mediated by their interaction with proteins, resulting in the formation of covalent adducts or in the modulation of their expression and/or activity. In this review we focus on membrane proteins affected by lipid peroxidation-derived aldehydes, under physiological and pathological conditions.

  4. Lipid-derived aldehyde degradation under thermal conditions.

    Science.gov (United States)

    Zamora, Rosario; Navarro, José L; Aguilar, Isabel; Hidalgo, Francisco J

    2015-05-01

    Nucleophilic degradation produced by reactive carbonyls plays a major role in food quality and safety. Nevertheless, these reactions are complex because reactive carbonyls are usually involved in various competitive reactions. This study describes the thermal degradation of 2-alkenals (2-pentenal and 2-octenal) and 2,4-alkadienals (2,4-heptadienal and 2,4-decadienal) in an attempt to both clarify the stability of aldehydes and determine new compounds that might also play a role in nucleophile/aldehyde reactions. The obtained results showed that alkenals and alkadienals decomposed rapidly in the presence of buffer and air to produce formaldehyde, acetaldehyde, and the aldehydes corresponding to the breakage of the carboncarbon double bonds: propanal, hexanal, 2-pentenal, 2-octenal, glyoxal, and fumaraldehyde. The activation energy of double bond breakage was relatively low (∼ 25 kJ/mol) and the yield of alkanals (10-18%) was higher than that of 2-alkenals (∼ 1%). All these results indicate that these reactions should be considered in order to fully understand the range of nucleophile/aldehyde adducts produced.

  5. Antibiotics from basidiomycetes. 26. Phlebiakauranol aldehyde an antifungal and cytotoxic metabolite from Punctularia atropurpurascens.

    Science.gov (United States)

    Anke, H; Casser, I; Steglich, W; Pommer, E H

    1987-04-01

    Phlebiakauranol aldehyde and the corresponding alcohol were isolated from cultures of Punctularia atropurpurascens. The aldehyde but not the alcohol exhibited strong antifungal activity against several phytopathogens as well as antibacterial and cytotoxic activities. Two acetylated derivatives prepared from the aldehyde showed only very weak antifungal and antibacterial and moderate cytotoxic activities. We therefore assume, that the aldehyde group together with the high number of hydroxyl groups are responsible for the biological activity of the compound.

  6. Catalyst-Controlled Wacker-Type Oxidation: Facile Access to Functionalized Aldehydes

    OpenAIRE

    Wickens, Zachary K.; Skakuj, Kacper; Morandi, Bill; Grubbs, Robert H

    2014-01-01

    The aldehyde-selective oxidation of alkenes bearing diverse oxygen groups in the allylic and homoallylic position was accomplished with a nitrite-modified Wacker oxidation. Readily available oxygenated alkenes were oxidized in up to 88% aldehyde yield and as high as 97% aldehyde selectivity. The aldehyde-selective oxidation enabled the rapid, enantioselective synthesis of an important pharmaceutical agent, atomoxetine. Finally, the influence of proximal functional groups on this anti-Markovni...

  7. Melanoma of unknown origin: a case series.

    LENUS (Irish Health Repository)

    Kelly, J

    2010-12-01

    The natural history of metastatic melanoma involving lymph nodes, in the absence of a known primary site (cutaneous, ocular or mucosal) has, to date, been poorly defined; and the optimal management of this rare subtype of disease is therefore unclear. Melanomas of unknown primary site (MUP) are estimated to comprise between 3.7 and 6% of all melanomas (Anbari et al. in Cancer 79:1861-1821, 1997).

  8. Pediatric melanoma, moles, and sun safety.

    Science.gov (United States)

    Hawryluk, Elena B; Liang, Marilyn G

    2014-04-01

    Although pediatric melanoma is a rare disease, diagnosis and management of pigmented lesions in the pediatric population, particularly dysplastic nevi and Spitz nevi, can be challenging. In this article, we provide an overview of pigmented lesions in children, including melanoma and management of melanoma risk factors and melanocytic nevi in the pediatric population. Congenital melanocytic nevi, Spitz nevi, dysplastic and acquired nevi, and changes over time are reviewed. We discuss considerations for excision and management of pigmented lesions in children.

  9. Massive nodular melanoma scalp: a case report

    Directory of Open Access Journals (Sweden)

    A. Bhagya Lakshmi

    2015-04-01

    Full Text Available Melanoma is responsible for 1% to 2% of all cancer deaths around the world. Nodular melanoma often carries a poor prognosis because of no prodromal radial growth phase, early distant metastasis and significant tumour volume. We present a case of nodular melanoma measuring 20x10x8 cm in 28 year old tribal women. [Int J Res Med Sci 2015; 3(4.000: 1002-1005

  10. Primary rectal melanoma - a case report

    Directory of Open Access Journals (Sweden)

    Somak Das

    2015-01-01

    Full Text Available The most common site for malignant melanoma is skin, then eye and third is anorectal region. Primary anorectal malignant melanoma is still very uncommon. It is usually very aggressive and presents with altered bowel habit and rectal bleeding. Proctoscopy shows non-pigmented or lightly pigmented polypoid lesion. Histopathology is confirmatory. Early radical excision is mandatory. A 56 year-old female was presented with malignant melanoma of the lower third of rectum. We report this case for its rarity.

  11. BET and BRAF inhibitors act synergistically against BRAF-mutant melanoma.

    Science.gov (United States)

    Paoluzzi, Luca; Hanniford, Douglas; Sokolova, Elena; Osman, Iman; Darvishian, Farbod; Wang, Jinhua; Bradner, James E; Hernando, Eva

    2016-06-01

    Despite major advances in the treatment of metastatic melanoma, treatment failure is still inevitable in most cases. Manipulation of key epigenetic regulators, including inhibition of Bromodomain and extra-terminal domain (BET) family members impairs cell proliferation in vitro and tumor growth in vivo in different cancers, including melanoma. Here, we investigated the effect of combining the BET inhibitor JQ1 with the BRAF inhibitor Vemurafenib in in vitro and in vivo models of BRAF-mutant melanoma. We performed cytotoxicity and apoptosis assays, and a xenograft mouse model to determine the in vitro and in vivo efficacy of JQ1 in combination with Vemurafenib against BRAF-mutant melanoma cell lines. Further, to investigate the molecular mechanisms underlying the effects of combined treatment, we conducted antibody arrays of in vitro drug-treated cell lines and RNA sequencing of drug-treated xenograft tumors. The combination of JQ1 and Vemurafenib acted synergistically in BRAF-mutant cell lines, resulting in marked apoptosis in vitro, with upregulation of proapoptotic proteins. In vivo, combination treatment suppressed tumor growth and significantly improved survival compared to either drug alone. RNA sequencing of tumor tissues revealed almost four thousand genes that were uniquely modulated by the combination, with several anti-apoptotic genes significantly down-regulated. Collectively, our data provide a rationale for combined BET and BRAF inhibition as a novel strategy for the treatment of melanoma.

  12. Novel Targeted Therapies for Metastatic Melanoma.

    Science.gov (United States)

    Iams, Wade T; Sosman, Jeffrey A; Chandra, Sunandana

    Oncogene-targeted therapy is a major component of precision oncology, and although patients with metastatic melanoma have experienced improved outcomes with this strategy, there are a number of potential therapeutic targets currently under study that may further increase the drug armamentarium for this patient population. In this review, we discuss the landscape of targeted therapies for patients with advanced melanoma, focusing on oncogene mutation-specific targets. In patients with typical BRAF V600-mutant melanoma, combination BRAF and MEK inhibition has surpassed outcomes compared with monotherapy with BRAF or MEK inhibition alone, and current strategies seek to address inevitable resistance mechanisms. For patients with NRAS-mutant melanoma, MEK inhibitor monotherapy and combined MEK and CDK4/6 inhibition are burgeoning strategies; for patients with KIT-mutant melanoma, tyrosine kinase inhibition is being leveraged, and for NF-1-mutant melanoma, mTOR and MEK inhibition is being actively evaluated. In patients with atypical, non-V600 BRAF-mutant melanoma, MEK inhibitor monotherapy is the potential novel targeted approach on the horizon. For advanced uveal melanoma, novel targets such as IMCgp100 and glembatumumab have shown activity in early studies. We review additional strategies that remain in the preclinical and early clinical pipeline, so there is much hope for the future of targeted agents for distinct molecular cohorts of patients with advanced melanoma.

  13. Melanoma biomolecules: independently identified but functionally intertwined.

    Science.gov (United States)

    Dye, Danielle E; Medic, Sandra; Ziman, Mel; Coombe, Deirdre R

    2013-09-24

    The majority of patients diagnosed with melanoma present with thin lesions and generally these patients have a good prognosis. However, 5% of patients with early melanoma (CSPG4), and paired box 3 (PAX3). The goal is to provide context around what is known about the contribution of these biomarkers to melanoma biology and metastasis. Although each of these molecules have been independently identified as likely biomarkers, it is clear from our analyses that each are closely linked with each other, with intertwined roles in melanoma biology.

  14. Histone variants and melanoma: facts and hypotheses.

    Science.gov (United States)

    Konstantinov, Nikifor K; Ulff-Møller, Constance J; Dimitrov, Stefan

    2016-07-01

    Melanoma is the most aggressive form of skin cancer with rising incidence and morbidity. Despite advances in treatment, the 10-yr survival for patients with metastatic disease is less than 10%. During the past few years, ongoing research on different epigenomic aberrations in melanoma has catalyzed better understanding of its pathogenesis and identification of new therapeutics. In our review, we will focus on the role of histone variants, key epigenetic players in melanoma initiation and progression. Specifically, incorporation of histone variants enables additional layers of chromatin structure, and here, we will describe how alterations in this epigenetic behavior impact melanoma.

  15. [Orbital metastasis in malignant melanoma].

    Science.gov (United States)

    Pedroli, G L; Hamedani, M; Barraco, P; Oubaaz, A; Morax, S

    2001-03-01

    We report the case of a 60-year-old man presenting bilateral progressive proptosis with diplopia, weight loss, tachycardia, nervosity, and stomach pain. These signs seemed at first to favor a diagnosis of Graves'ophthalmopathy. Thyroid tests were negative and the initial orbital CT scan was considered normal. A new radiological investigation 4 months later in our hospital revealed typical hypertrophy of the extraocular muscles compatible with orbital metastasis. The systemic investigations demonstrated a pulmonary tumor, multiple hepatic lesions, and several pigmented nodules of gastric mucosa. The pathology of pulmonary and gastric specimens confirmed the diagnosis of malignant melanoma. The primary lesion remains unknown. The authors discuss the differential diagnoses of orbital metastasis and the radiological characteristics of orbital metastasis in malignant melanoma.

  16. Malignant rectal melanoma. Case report.

    Science.gov (United States)

    Morlino, Andrea; La Torre, Giuseppe; Vitagliano, Giulia; Cammarota, Aldo

    2015-03-26

    Il Melanoma Anorettale è una malattia rara e aggressiva ed è il terzo tipo più comune di melanoma maligno dopo quello della cute e della retina. Il sintomo più comune è il sanguinamento rettale, che è spesso scambiato per sanguinamento associato a emorroidi. La diagnosi è molto difficile, e quella iniziale può essere corretta solo in circa 80% dei casi. Il caso clinico che proponiamo riguarda un uomo di 71 anni giunto alla nostra osservazione per dolore anale, tenesmo rettale, sanguinamento. L’eplorazione rettale ci ha mostrato una neofromazione dolorosa, di colorito brunastro nel canale anale. La colonscopia e la endoscopia hanno evidenziato la presenza di una grande massa stenotica interessante il canale anale ed il retto con un diametro di circa 90 mm. La biopsia è positiva per melanoma a cellule maligne pigmentate. La TAC ha mostrato un ispessimento della parete rettale e linfonodi nel tessuto adiposo, nel distretto otturatore bilaterale e metastasi polmonari bilaterali. Il dato di laboratorio del Ca 19-9 è nei livelli normali. Il paziente è stato sottoposto a resezione addomino-perineale con dissezione linfonodale. Non ci sono studi dimostranti che la resezione radicale del melanoma primario ano-rettale è associata ad un miglioramento del controllo locale e della sopravvivenza. I pazienti con malattia localizzata dovrebbero essere sottoposti a escissione locale ogniqualvolta ciò sia tecnicamente fattibile. Il ruolo predominante del trattamento chemio radioterapico preoperatorio è quello di ridurre le recidive locoregionale e della cavità pelvica, e per ottenere un più alto tasso di conservazione dell’apparato sfinteriale. Inoltre facilita la rimozione delle potenziali micrometastasi e riduce le metastasi a distanza.

  17. Melanoma immunotherapy: dendritic cell vaccines

    OpenAIRE

    Lozada-Requena, Ivan; Laboratorios de Inmunología #108, Laboratorio de investigación y Desarrollo, Facultad de Ciencieas y Filosofía, Universidad Cayetano Heredia. Lima, Perú Empresa de Investigación y Desarrollo en Cáncer (EMINDES) SAC. Lima, Perú.; Núñez, César; Empresa de Investigación y Desarrollo en Cáncer (EMINDES) SAC. Lima, Perú.; Aguilar, José Luis; Laboratorios de Inmunología #108, Laboratorio de investigación y Desarrollo, Facultad de Ciencieas y Filosofía, Universidad Cayetano Heredia. Lima, Perú.

    2015-01-01

    This is a narrative review that shows accessible information to the scientific community about melanoma and immunotherapy.Dendritic cells have the ability to participate in innate and adaptive immunity, but are not unfamiliar to the immune evasion oftumors. Knowing the biology and role has led to generate in vitro several prospects of autologous cell vaccines against diversetypes of cancer in humans and animal models. However, given the low efficiency they have shown, we must implementstrateg...

  18. UVB: suscetibilidade no melanoma maligno UVB: susceptibility in malignant melanoma

    Directory of Open Access Journals (Sweden)

    Nilton Nasser

    2010-12-01

    Full Text Available FUNDAMENTOS: Está bem definido que a radiação ultravioleta provoca depleção imunológica na pele, permitindo o desenvolvimento de tumores cutâneos malignos. A maioria dos pacientes de cânceres da pele não melanomas são considerados UVB-suscetíveis. OBJETIVOS: Estudar a UVB-suscetibilidade nos pacientes com melanoma maligno e se este é um fator de risco para o desenvolvimento desse câncer. MÉTODOS: Foram selecionados 88 voluntários divididos em dois grupos: grupo-controle saudável (n=61 e grupo de portadores de melanoma (n=27, todos identificados de acordo com os critérios: tipo histológico, nível de invasão, fotótipos de pele, sexo e idade. A suscetibilidade à radiação ultravioleta B (UVB foi medida pela reação de hipersensibilidade ao contato com o difenciprone nos voluntários sensibilizados em áreas previamente irradiadas. RESULTADOS: A suscetibilidade à radiação UVB foi de 81,5% nos pacientes com melanoma maligno e de 31,2% no grupo-controle. O risco de um indivíduo desenvolver o melanoma maligno foi 9,7 vezes maior do que nos indivíduos UVB-resistentes. CONCLUSÕES: A UVB-suscetibilidade pode ser considerada um fator de risco importante para o desenvolvimento do melanoma maligno.BACKGROUND: It is well established that UV radiation provokes an immunological depletion in the skin, enabling the development of malignant cutaneous tumors. Most nonmelanoma skin cancer patients are considered to be UVB-susceptible. OBJECTIVE: To study the behavior of UVB- susceptibility in malignant melanoma (MM patients and whether this is a risk factor to the development of MM. METHODS: Eighty-eight volunteers were selected and divided into two groups: healthy control group (n = 61 and MM group (n = 27, which were identified according to the following clinical criteria: histopathological type, level of invasion, skin phototype, sex and age. Susceptibility to ultraviolet B (UVB radiation was measured by the onset of a contact

  19. Choroidal Metastases From Cutaneous Melanoma.

    Science.gov (United States)

    Mercado, Carmel L; Toy, Brian C; Kistler, Henry B; Moshfeghi, Darius M

    2016-05-01

    A 92-year-old man presented with months of progressive blurry vision, worsening acutely in his right eye. He denied pain, diplopia, or photopsias. His history was significant for multiple myeloma, prostate cancer, and malignant melanoma of his right shoulder treated with local excision. He had local recurrence with hepatic metastasis of the melanoma treated with radiation and chemotherapy. On examination, his visual acuity was counting fingers in the right eye and 20/60 in the left eye. Amsler grid testing demonstrated metamorphopsia in the right eye. Fundus exam of the right and left eyes revealed multiple, elevated, pigmented choroidal lesions, with associated subretinal fluid in the right macula. This appearance is consistent with hematogenous metastasis of cutaneous malignant melanoma to the choroid and associated serous fluid-causing metamorphopsia. The patient was enrolled in a clinical trial combining plasmid IL-12 with pembrolizumab (Keytruda; Merck, Whitehouse Station, NJ). He passed away 2 months after initial presentation to our clinic. [Ophthalmic Surg Lasers Imaging Retina. 2016;47:497.].

  20. Spontaneous Splenic Rupture in Melanoma

    Directory of Open Access Journals (Sweden)

    Hadi Mirfazaelian

    2014-01-01

    Full Text Available Spontaneous rupture of spleen due to malignant melanoma is a rare situation, with only a few case reports in the literature. This study reports a previously healthy, 30-year-old man who came with chief complaint of acute abdominal pain to emergency room. On physical examination, abdominal tenderness and guarding were detected to be coincident with hypotension. Ultrasonography revealed mild splenomegaly with moderate free fluid in abdominopelvic cavity. Considering acute abdominal pain and hemodynamic instability, he underwent splenectomy with splenic rupture as the source of bleeding. Histologic examination showed diffuse infiltration by tumor. Immunohistochemical study (positive for S100, HMB45, and vimentin and negative for CK, CD10, CK20, CK7, CD30, LCA, EMA, and chromogranin confirmed metastatic malignant melanoma. On further questioning, there was a past history of a nasal dark skin lesion which was removed two years ago with no pathologic examination. Spontaneous (nontraumatic rupture of spleen is an uncommon situation and it happens very rarely due to neoplastic metastasis. Metastasis of malignant melanoma is one of the rare causes of the spontaneous rupture of spleen.

  1. Melanoma: from mutations to medicine

    Science.gov (United States)

    Tsao, Hensin; Chin, Lynda; Garraway, Levi A.; Fisher, David E.

    2012-01-01

    Melanoma is often considered one of the most aggressive and treatment-resistant human cancers. It is a disease that, due to the presence of melanin pigment, was accurately diagnosed earlier than most other malignancies and that has been subjected to countless therapeutic strategies. Aside from early surgical resection, no therapeutic modality has been found to afford a high likelihood of curative outcome. However, discoveries reported in recent years have revealed a near avalanche of breakthroughs in the melanoma field—breakthroughs that span fundamental understanding of the molecular basis of the disease all the way to new therapeutic strategies that produce unquestionable clinical benefit. These discoveries have been born from the successful fruits of numerous researchers working in many—sometimes-related, although also distinct—biomedical disciplines. Discoveries of frequent mutations involving BRAF(V600E), developmental and oncogenic roles for the microphthalmia-associated transcription factor (MITF) pathway, clinical efficacy of BRAF-targeted small molecules, and emerging mechanisms underlying resistance to targeted therapeutics represent just a sample of the findings that have created a striking inflection in the quest for clinically meaningful progress in the melanoma field. PMID:22661227

  2. Melanoma of the female urethra

    Directory of Open Access Journals (Sweden)

    Juan A Ramos

    2011-01-01

    Full Text Available Melanoma is a malignant tumor that can affect any area of the anatomical economy. Its appearance in the female urethra is extremely rare, with approximately 121 cases in indexed literature since 1966. The subject to be described is an 86-year-old woman who seeks assessment for intermittent macroscopic hematuria with blood clots of 3 months progression. On physical examination, there are no suspicious lesions detected on the surface of the skin. On external genital examination, it is observed a friable lesion at the level of the urethral meatus, with heterogeneous digitations, dark brown to black, and irregular polycyclic borders. No inguinal adenomegalies were palpated. Cystourethroscopy and biopsy of the lesion confirm the diagnosis. Melanoma of the female urethra is an extremely infrequent pathology. Due to lack of published case reports and the absence of prospective randomized trials on treatment outcomes, treatment must be directed using the same anatomical and surgical criteria for female urethral tumors, adding also the concepts of treatment of mucosal melanoma, even though its prognosis is different from the before mentioned.

  3. Mucosal malignant melanoma - a clinical, oncological, pathological and genetic survey.

    Science.gov (United States)

    Mikkelsen, Lauge H; Larsen, Ann-Cathrine; von Buchwald, Christian; Drzewiecki, Krzysztof T; Prause, Jan U; Heegaard, Steffen

    2016-06-01

    Mucosal melanomas constitute 1.3% of all melanomas and they may develop in any mucosal membrane. Conjunctival melanomas (0.5/million/year) and melanomas in the sinonasal cavity (0.5/million/year) are the most common, followed by anorectal melanomas (0.4/million/year) and melanomas in the oral cavity (0.2/million/year). Anorectal melanoma occurs slightly more often in females, whereas oral melanoma has a male predilection. Mucosal melanoma most commonly develops in a patient's sixth or seventh decade of life, and no differences between races have been found except for sinonasal melanoma and conjunctival melanoma, which are very rare in Black people. The symptoms are not tumour-specific and are related to the organ system affected, and the disease is most often diagnosed at an advanced clinical stage. The diagnosis of a primary tumour is difficult, and metastatic cutaneous melanoma and choroidal melanoma must be excluded. Mutations in KIT are frequently found, while BRAF and NRAS mutations are rarely found - except in conjunctival melanomas that carry BRAF mutations. Mutations in the TERT promotor region are also found in mucosal melanomas. Complete surgical resection with free margins is the treatment of choice. The prognosis is poor, with the 5-year survival rate ranging from 0% (gastric melanoma) to 80% (conjunctival melanoma).

  4. Esophageal melanomas harbor frequent NRAS mutations unlike melanomas of other mucosal sites.

    Science.gov (United States)

    Sekine, Shigeki; Nakanishi, Yukihiro; Ogawa, Reiko; Kouda, Satoko; Kanai, Yae

    2009-05-01

    Mucosal melanomas have genetic alterations distinct from those in cutaneous melanomas. For example, NRAS- and BRAF-activating mutations occur frequently in cutaneous melanomas, but not in mucosal melanomas. We examined 16 esophageal melanomas for genetic alterations in NRAS, BRAF, and KIT to determine whether they exhibit genetic features common to melanomas arising from other mucosal sites. A sequencing analysis identified NRAS mutations in six cases; notably, four of these mutations were located in exon 1, an uncommon mutation site in cutaneous and other mucosal melanomas. BRAF and KIT mutations were found in one case each. Immunohistochemistry showed KIT expression in four cases, including the tumor with a KIT mutation and two other intramucosal tumors. The low frequency of BRAF mutations and the presence of a KIT mutation-positive case are findings similar to those of mucosal melanomas of other sites, but the prevalence of NRAS mutations was even higher than that of cutaneous melanomas. The present study implies that esophageal melanomas have genetic alterations unique from those observed in other mucosal melanomas.

  5. Targeting invasive properties of melanoma cells.

    Science.gov (United States)

    Arozarena, Imanol; Wellbrock, Claudia

    2017-07-01

    Melanoma is a skin cancer notorious for its metastatic potential. As an initial step of the metastatic cascade, melanoma cells part from the primary tumour and invade the surrounding tissue, which is crucial for their dissemination and the formation of distant secondary tumours. Over the last two decades, our understanding of both, general and melanoma specific mechanisms of invasion has significantly improved, but to date no efficient therapeutic strategy tackling the invasive properties of melanoma cells has reached the clinic. In this review, we assess the major contributions towards the understanding of the molecular biology of melanoma cell invasion with a focus on melanoma specific traits. These traits are based on the neural crest origin of melanoma cells and explain their intrinsic invasive nature. A particular emphasis is given not only to lineage specific signalling mediated by TGFβ, and noncanonical and canonical WNT signalling, but also to the role of PDE5A and RHO-GTPases in modulating modes of melanoma cell invasion. We discuss existing caveats in the current understanding of the metastatic properties of melanoma cells, as well as the relevance of the 'phenotype switch' model and 'co-operativity' between different phenotypes in heterogeneous tumours. At the centre of these phenotypes is the lineage commitment factor microphthalmia-associated transcription factor, one of the most crucial regulators of the balance between de-differentiation (neural crest specific gene expression) and differentiation (melanocyte specific gene expression) that defines invasive and noninvasive melanoma cell phenotypes. Finally, we provide insight into the current evidence linking resistance to targeted therapies to invasive properties of melanoma cells. © 2017 Federation of European Biochemical Societies.

  6. Genetic progression of malignant melanoma.

    Science.gov (United States)

    Tímár, J; Vizkeleti, L; Doma, V; Barbai, T; Rásó, E

    2016-03-01

    Malignant melanoma of the skin is the most aggressive human cancer given that a primary tumor a few millimeters in diameter frequently has full metastatic competence. In view of that, revealing the genetic background of this potential may also help to better understand tumor dissemination in general. Genomic analyses have established the molecular classification of melanoma based on the most frequent driver oncogenic mutations (BRAF, NRAS, KIT) and have also revealed a long list of rare events, including mutations and amplifications as well as genetic microheterogeneity. At the moment, it is unclear whether any of these rare events have role in the metastasis initiation process since the major drivers do not have such a role. During lymphatic and hematogenous dissemination, the clonal selection process is evidently reflected by differences in oncogenic drivers in the metastases versus the primary tumor. Clonal selection is also evident during lymphatic progression, though the genetic background of this immunoselection is less clear. Genomic analyses of metastases identified further genetic alterations, some of which may correspond to metastasis maintenance genes. The natural genetic progression of melanoma can be modified by targeted (BRAF or MEK inhibitor) or immunotherapies. Some of the rare events in primary tumors may result in primary resistance, while further new genetic lesions develop during the acquired resistance to both targeted and immunotherapies. Only a few genetic lesions of the primary tumor are constant during natural or therapy-modulated progression. EGFR4 and NMDAR2 mutations, MITF and MET amplifications and PTEN loss can be considered as metastasis drivers. Furthermore, BRAF and MITF amplifications as well as PTEN loss are also responsible for resistance to targeted therapies, whereas NRAS mutation is the only founder genetic lesion showing any association with sensitivity to immunotherapies. Unfortunately, there are hardly any data on the

  7. Mek inhibition results in marked antitumor activity against metastatic melanoma patient-derived melanospheres and in melanosphere-generated xenografts.

    Science.gov (United States)

    Sette, Giovanni; Fecchi, Katia; Salvati, Valentina; Lotti, Fiorenza; Pilozzi, Emanuela; Duranti, Enrico; Biffoni, Mauro; Pagliuca, Alfredo; Martinetti, Daniela; Memeo, Lorenzo; Milella, Michele; De Maria, Ruggero; Eramo, Adriana

    2013-11-16

    One of the key oncogenic pathways involved in melanoma aggressiveness, development and progression is the RAS/BRAF/MEK pathway, whose alterations are found in most patients. These molecular anomalies are promising targets for more effective anti-cancer therapies. Some Mek inhibitors showed promising antitumor activity, although schedules and doses associated with low systemic toxicity need to be defined. In addition, it is now accepted that cancers can arise from and be maintained by the cancer stem cells (CSC) or tumor-initiating cells (TIC), commonly expanded in vitro as tumorspheres from several solid tumors, including melanoma (melanospheres). Here, we investigated the potential targeting of MEK pathway by exploiting highly reliable in vitro and in vivo pre-clinical models of melanomas based on melanospheres, as melanoma initiating cells (MIC) surrogates. MEK inhibition, through PD0325901, provided a successful strategy to affect survival of mutated-BRAF melanospheres and growth of wild type-BRAF melanospheres. A marked citotoxicity was observed in differentated melanoma cells regardless BRAF mutational status. PD0325901 treatment, dramatically inhibited growth of melanosphere-generated xenografts and determined impaired tumor vascularization of both mutated- and wild type-BRAF tumors, in the absence of mice toxicity. These results suggest that MEK inhibition might represent a valid treatment option for patients with both mutated- or wild type-BRAF melanomas, affecting tumor growth through multiple targets.

  8. Inhibition of the STAT3 signaling pathway contributes to apigenin-mediated anti-metastatic effect in melanoma.

    Science.gov (United States)

    Cao, Hui-Hui; Chu, Jian-Hong; Kwan, Hiu-Yee; Su, Tao; Yu, Hua; Cheng, Chi-Yan; Fu, Xiu-Qiong; Guo, Hui; Li, Ting; Tse, Anfernee Kai-Wing; Chou, Gui-Xin; Mo, Huan-Biao; Yu, Zhi-Ling

    2016-02-25

    Signal transducer and activator of transcription 3 (STAT3) signaling is constantly activated in human melanoma, and promotes melanoma metastasis. The dietary flavonoid apigenin is a bioactive compound that possesses low toxicity and exerts anti-metastatic activity in melanoma. However, the anti-metastasis mechanism of apigenin has not been fully elucidated. In the present study, we showed that apigenin suppressed murine melanoma B16F10 cell lung metastasis in mice, and inhibited cell migration and invasion in human and murine melanoma cells. Further study indicated that apigenin effectively suppressed STAT3 phosphorylation, decreased STAT3 nuclear localization and inhibited STAT3 transcriptional activity. Apigenin also down-regulated STAT3 target genes MMP-2, MMP-9, VEGF and Twist1, which are involved in cell migration and invasion. More importantly, overexpression of STAT3 or Twist1 partially reversed apigenin-impaired cell migration and invasion. Our data not only reveal a novel anti-metastasis mechanism of apigenin but also support the notion that STAT3 is an attractive and promising target for melanoma treatment.

  9. Aldehyde sources, metabolism, molecular toxicity mechanisms, and possible effects on human health.

    Science.gov (United States)

    O'Brien, Peter J; Siraki, Arno G; Shangari, Nandita

    2005-08-01

    Aldehydes are organic compounds that are widespread in nature. They can be formed endogenously by lipid peroxidation (LPO), carbohydrate or metabolism ascorbate autoxidation, amine oxidases, cytochrome P-450s, or myeloperoxidase-catalyzed metabolic activation. This review compares the reactivity of many aldehydes towards biomolecules particularly macromolecules. Furthermore, it includes not only aldehydes of environmental or occupational concerns but also dietary aldehydes and aldehydes formed endogenously by intermediary metabolism. Drugs that are aldehydes or form reactive aldehyde metabolites that cause side-effect toxicity are also included. The effects of these aldehydes on biological function, their contribution to human diseases, and the role of nucleic acid and protein carbonylation/oxidation in mutagenicity and cytotoxicity mechanisms, respectively, as well as carbonyl signal transduction and gene expression, are reviewed. Aldehyde metabolic activation and detoxication by metabolizing enzymes are also reviewed, as well as the toxicological and anticancer therapeutic effects of metabolizing enzyme inhibitors. The human health risks from clinical and animal research studies are reviewed, including aldehydes as haptens in allergenic hypersensitivity diseases, respiratory allergies, and idiosyncratic drug toxicity; the potential carcinogenic risks of the carbonyl body burden; and the toxic effects of aldehydes in liver disease, embryo toxicity/teratogenicity, diabetes/hypertension, sclerosing peritonitis, cerebral ischemia/neurodegenerative diseases, and other aging-associated diseases.

  10. Update on the targeted therapy of melanoma.

    Science.gov (United States)

    Johnson, Douglas B; Sosman, Jeffrey A

    2013-06-01

    Melanoma is the most aggressive of the cutaneous malignancies, causing more than 9,000 deaths in the past year in the United States. Historically, systemic therapies have been largely ineffective, because melanoma is usually resistant to cytotoxic chemotherapy. However, during the past few years, several targeted therapies have proved effective in this challenging disease. These recent advances have been facilitated by an improved understanding of the driving genetic aberrations of melanoma, particularly mutations in the mitogen-activated protein kinase (MAPK) pathway. Vemurafenib, a BRAF inhibitor, demonstrated an overall survival advantage in phase III trials and is an appropriate option for first-line therapy in metastatic BRAF mutant melanoma. Dabrafenib, another BRAF inhibitor, and trametinib, a MEK inhibitor, also have been shown to be effective in phase III trials for BRAF mutant melanoma and may be additional treatment options as monotherapy or in combination pending regulatory approval. Additionally, imatinib is a promising targeted therapy for patients whose tumors harbor a KIT mutation in exons 11 and 13. Although these targeted agents cause objective responses and clinical benefit in patients with metastatic melanoma, resistance invariably develops. New targets and strategies to overcome acquired resistance are urgently needed. Furthermore, no effective targeted therapy has been developed for NRAS mutant tumors or in melanomas with as yet unknown driver mutations. In this review, we discuss current molecular targeted treatment options and promising ongoing research to develop new strategies to treat melanoma.

  11. Mistletoe in the treatment of malignant melanoma

    Directory of Open Access Journals (Sweden)

    Esin Sakallı Çetin

    2014-03-01

    Full Text Available Malignant melanoma is a malignant neoplasia drives from melanocytes. Malignant melanoma, the most causing death, is seen in the third place at skin cancer. Malignant melanoma shows intrinsic resistance to chemotherapeutic agents and variability in the course of the disease which are distinct features separating from other solid tumors. These features prevent the development and standardization of non-surgical treatment models of malignant melanoma. Although there is a large number of chemotherapeutic agents used in the treatment of metastatic malignant melanoma, it hasn’t been demonstrated the survival advantage of adjuvant treatment with chemotherapeutic agents. Because of the different clinical course of malignant melanoma, the disease is thought to be closely associated with immune system. Therefore, immunomodulatory therapy models were developed. Mistletoe stimulates the immune system by increasing the number and activity of dendritic cells, thus it has been shown to effect on tumor growth and metastasis of malignant melanoma patient. Outlined in this review are the recent developments in the understanding the role of mistletoe as a complementary therapy for malignant melanoma. J Clin Exp Invest 2014; 5 (1: 145-152

  12. Psychosocial care to patients with Malignant Melanoma

    DEFF Research Database (Denmark)

    Thorup, Charlotte Brun

    Psychosocial care to patients with Malignant Melanoma Intensions: The intension of this project is to link new knowledge with the nurses experience based knowledge within the psychosocial care to patients, who have been diagnosed with Malignant Melanoma (MM), thereby improving the care...

  13. Angiogenic and Metastatic Determinants of Malignant Melanoma

    NARCIS (Netherlands)

    A. Mooppilmadham Das (Asha)

    2015-01-01

    markdownabstractCutaneous melanoma or malignant melanoma of the skin is a highly metastatic disease, with an increasing rate of incidence, poor prognosis and high resistance to therapeutic intervention. Although early diagnosis and surgical resection of the primary lesion could significantly improve

  14. Angiogenic and Metastatic Determinants of Malignant Melanoma

    NARCIS (Netherlands)

    A. Mooppilmadham Das (Asha)

    2015-01-01

    markdownabstractCutaneous melanoma or malignant melanoma of the skin is a highly metastatic disease, with an increasing rate of incidence, poor prognosis and high resistance to therapeutic intervention. Although early diagnosis and surgical resection of the primary lesion could significantly improve

  15. The worth of radiotherapy in malignant melanomas.

    Science.gov (United States)

    Proppe, A H

    1978-08-01

    A new approach for the evaluation of the effectiveness of various forms of treatment of malignant melanomas is presented. Factors influencing the survival time from initiation of therapy until death were statistically analyzed in 548 patients who died from malignant melanoma. In slowly developing malignancies X-ray therapy was found to be superior to therapeutic methods.

  16. Mangement of malignant melanomas: an overview.

    Science.gov (United States)

    Epstein, W L

    1979-02-01

    This paper presents an overview of the management of malignant melanoma. It considers the value of wide reexcision relative to the depth of invasion of the melanoma. It considers the indications for elective lymphadenectomy and presents a critical review of chemotherapy, immunotherapy and other procedures, such as X ray. The conclusion is that surgery, wherever feasible, is still the best approach.

  17. Malignant melanoma at a scientific laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Shy, C.M.; Checkoway, H.; Marshall, E.G.

    1985-11-15

    The general consensus of the seven reviewers is that occupational exposures at Lawrence Livermore National Laboratory have not been established as a causal factor for the observed excess of malignant melanoma. Several observations support the impression that some or all of the observed melanoma excess may be attributable to intense surveillance and enhanced detection of early stage melanoma lesions. Since the incidence of melanomas among Laboratory employees has not diminished, an early harvesting effect is unlikely. This suggests the distinct possibility that localized, in situ melanomas that would normally not be detected are being reported, and that in the absence of this enhanced detection, many of these early stage lesions would show little or no clinical progression. This phenomenon would explain the continued high incidence of melanomas in the absence of a physical or chemical inciting cause. A key point in this reasoning is the issue of the rate of growth of early stage melanomas, and this point remains a key question for study. Even if the observed excess cannot be explained by detection bias, the reviewers agree that the Austin and Reynolds' study does not make a convincing case for occupational factors being a cause of the high melanoma incidence. 6 refs.

  18. Study Refutes Viagra-Melanoma Link

    Science.gov (United States)

    ... shows no connection between impotence drug and deadly skin cancer, after all To use the sharing features on this ... JavaScript. (*this news item will not be available after ... melanoma skin cancer, researchers report. "Physicians should still screen for melanoma ...

  19. Novel approaches in melanoma prevention and therapy.

    Science.gov (United States)

    Grimaldi, Antonio M; Cassidy, Pamela B; Leachmann, Sancy; Ascierto, Paolo A

    2014-01-01

    The incidence of cutaneous melanoma has risen at a rate significantly higher than that for other malignancies. This increase persists despite efforts to educate the public about the dangers of excess exposure to UV radiation from both the sun and tanning beds. Melanoma affects a relatively younger population and is notorious for its propensity to metastasize and for its poor response to current therapeutic regimens. These factors make prevention an integral component to the goal of decreasing melanoma-related mortality. Transformation of melanocytes into malignant melanoma involves the interplay between genetic factors, UV exposure, and the tumor microenvironment. The roles of UV radiation in the etiology of melanoma are mediated by both direct damage of DNA through formation of photoproducts and production of reactive oxygen species (ROS). Many of the promising antioxidant agents under development for the prevention of melanoma are derived from foodstuffs. B-Raf is a member of the Raf kinase family of serine/threonine-specific protein kinases that plays a role in regulating the MAP kinase/ERKs signaling pathway. About 50 % of melanomas harbor activating BRAF mutations. BRAF mutations are found in 59 % of the melanomas arising in skin with intermittent sun exposure, such as trunk and arms, as compared with only 23 % of the acral melanomas, 11 % of mucosal melanomas, and 0 % of uveal melanomas. Two new agents, ipilimumab and vemurafenib, have been shown to improve outcome of advanced melanoma as presented at the plenary session of the 2011 annual meeting of the American Society of Clinical Oncology. Vemurafenib is the first personalized compound which demonstrated an improvement in progression-free survival (PFS) and overall survival (OS) in metastatic melanoma harboring the BRAFV600 mutation and represents the first drug of a class that exerts its anti-proliferative activity through inhibition of a highly specific molecular target. GSK2118436 (dabrafenib), the

  20. Primary gastric melanoma: A case report

    Institute of Scientific and Technical Information of China (English)

    Emmanuel Eustathios Lagoudianakis; Michael Genetzakis; Dimitrios Konstantinos Tsekouras; Artemisia Papadima; Georgia Kafiri; Konstantinos Toutouzas; Vaggelogiannis Katergiannakis; Andreas Manouras

    2006-01-01

    Melanoma accounts for 1-3 per cent of all malignant tumors. Except cutaneous, other less common melanomas include, among others, those in the GI tract.However, their primary or secondary nature is often difficult to establish. Referring to the stomach, scattered cases of primary melanomas have been reported in the literature.We report a case of a man with an ulcerated submucosal mass at the antrum of the stomach, manifested with dull upper abdominal pain, nausea, vomiting,fatigue and anemia. This lesion was histologically proved to be melanoma. A detailed clinical and laboratory investigation revealed no primary site elsewhere.To our knowledge, very few cases of primary gastric melanoma have been reported. Our case is the fourth ever published and the first located at the antrum of the stomach. The debate upon the primitive nature of such lesions still persists. Thus, specific diagnostic criteria have been proposed.

  1. A rare case of rynopharyngeal melanoma

    Science.gov (United States)

    Grecchi, Francesco; Podrecca, Stefano; Zollino, Ilaria; Candotto, Valentina; Gallo, Francesco; Rubino, Giuseppe; Bianco, Raffaella; Carinci, Francesco

    2012-01-01

    Primary mucosal melanomas (MM) of the head and neck region constitute 0.5-2% of all malignant melanomas. The rynopharynx is a region that is less often involved by malignant melanomas. Because most of mucosal melanotic lesions are painless in their early stages, the diagnosis is unfortunately often delayed until symptoms resulting from ulceration, growth, and/or bleeding are noted. Here, we document the rare case of a malignant rynopharynx melanoma of a 43 year old woman. Its treatment and the pertinent literature are discussed. No complication was recorded in the post-operative period and no further surgery was performed. The follow up showed no recurrence in the same position and with the same characteristics, even after six years. Mucosal melanomas are aggressive tumours and the prognosis in these patients is poor. Clinicians must use treatment strategies that provide functional benefit, so as to maintain quality of life without excessive toxicity. PMID:23814590

  2. Alpha particles for treatment of disseminated melanoma

    Energy Technology Data Exchange (ETDEWEB)

    Link, E.M. [London Univ. (United Kingdom)

    2010-11-15

    Invading melanoma spreads to local and unpredictable distant location at the early stages of its development. It is justifiable, therefore to classify the disease as a systemic disorder. This requires a systemic treatment that reaches all melanoma cells irrespective of whether they are singly dispersed and in circulation or already forming solid tumours of various sizes. Targeted radiotherapy affects directly and selectively cancer cells provided an appropriate radionuclide and its carrier are chosen. Melanoma is a pigmented tumour. Methylene blue (MTB) accumulates selectively in melanoma cells due to its exceptionally high affinity to melanin. MTB serves, therefore, as a carrier for radionuclides. {sup 211}At-MTB has proved to be particularly effective in treating disseminated melanoma when administered systemically and, at the same time, non-toxic to normal non-pigmented and pigmented organs. (author)

  3. Alpha particles for treatment of disseminated melanoma

    Energy Technology Data Exchange (ETDEWEB)

    Link, E.M. [London University (United Kingdom)

    2010-07-01

    Invading melanoma spreads to local and unpredictable distant location at the early stages of its development. It is justifiable, therefore, to classify the disease as a systemic disorder. This requires a systemic treatment that reaches all melanoma cells irrespective of whether they are singly dispersed and in circulation or already forming solid tumours of various sizes. Targeted radiotherapy affects directly and selectively cancer cells provided an appropriate radionuclide and its carrier are chosen. Melanoma is a pigmented tumour. Methylene blue (MTB)) accumulates selectively in melanoma cells due to its exceptionally high affinity to melanin. MTB serves, therefore, as a carrier for radionuclides. {sup 211}At-MTB has proved to be particularly effective in treating disseminated melanoma when administered systemically and, at the same time, non-toxic to normal non-pigmented and pigmented organs. (authors)

  4. Optic nerve invasion of uveal melanoma

    DEFF Research Database (Denmark)

    Lindegaard, Jens; Isager, Peter; Prause, Jan Ulrik

    2007-01-01

    The aim of the study was to identify the histopathological characteristics associated with the invasion of the optic nerve of uveal melanoma and to evaluate the association between invasion of the optic nerve and survival. In order to achieve this, all uveal melanomas with optic nerve invasion...... in Denmark between 1942 and 2001 were reviewed (n=157). Histopathological characteristics and depth of optic nerve invasion were recorded. The material was compared with a control material from the same period consisting of 85 cases randomly drawn from all choroidal/ciliary body melanomas without optic nerve......; and 4) in one case a tumor spread along the inner limiting membrane to the optic nerve through the lamina cribrosa. Invasion of the optic nerve had no impact on all-cause mortality or melanoma-related mortality in multivariate analyses. The majority of melanomas invading the optic nerve are large...

  5. Diagnostic and Prognostic Biomarkers in Melanoma

    Science.gov (United States)

    Leininger, Jennifer; Hamby, Carl; Safai, Bijan

    2014-01-01

    Melanoma is a lethal melanocytic neoplasm. Unfortunately, the histological diagnosis can be difficult at times. Distinguishing ambiguous melanocytic neoplasms that are benign nevi from those that represent true melanoma is important both for treatment and prognosis. Diagnostic biomarkers currently used to assist in the diagnosis of melanoma are usually specific only for melanocytic neoplasms and not necessarily for their ability to metastasize. Traditional prognostic biomarkers include depth of invasion and mitotic count. Newer diagnostic and prognostic biomarkers utilize immunohistochemical staining as well as ribonucleic acid, micro-ribonucleic acid, and deoxyribonucleic acid assays and fluorescence in situ hybridization. Improved diagnostic and prognostic biomarkers are of increasing importance in the treatment of melanoma with the development of newer and more targeted therapies. Herein, the authors review many of the common as well as newer diagnostic and prognostic biomarkers used in melanoma. PMID:25013535

  6. Progression of cutaneous melanoma: implications for treatment

    Science.gov (United States)

    Leong, Stanley P. L.; Mihm, Martin C.; Murphy, George F.; Hoon, Dave S. B.; Kashani-Sabet, Mohammed; Agarwala, Sanjiv S.; Zager, Jonathan S.; Hauschild, Axel; Sondak, Vernon K.; Guild, Valerie; Kirkwood, John M.

    2015-01-01

    The survival rates of melanoma, like any type of cancer, become worse with advancing stage. Spectrum theory is most consistent with the progression of melanoma from the primary site to the in-transit locations, regional or sentinel lymph nodes and beyond to the distant sites. Therefore, early diagnosis and surgical treatment before its spread is the most effective treatment. Recently, new approaches have revolutionized the diagnosis and treatment of melanoma. Genomic profiling and sequencing will form the basis for molecular taxonomy for more accurate subgrouping of melanoma patients in the future. New insights of molecular mechanisms of metastasis are summarized in this review article. Sentinel lymph node biopsy has become a standard of care for staging primary melanoma without the need for a more morbid complete regional lymph node dissection. With recent developments in molecular biology and genomics, novel molecular targeted therapy is being developed through clinical trials. PMID:22892755

  7. Melanoma Surveillance in the US: Collecting Melanoma Data

    Centers for Disease Control (CDC) Podcasts

    2011-10-19

    This podcast accompanies the publication of a series of articles on melanoma surveillance in the United States, available in the November supplement edition of the Journal of the American Academy of Dermatology. Dr. Suephy Chen, a dermatologist from Emory University, discusses why the articles are important, as well as the need to increase dermatologists’ awareness of cancer registries and reporting requirements.  Created: 10/19/2011 by National Center for Chronic Disease Prevention and Health Promotion (NCCDPHP).   Date Released: 10/19/2011.

  8. Interactions Between Exogenous Bt Insecticidal Protein and Cotton Terpenoid Aldehydes

    Institute of Scientific and Technical Information of China (English)

    ZHANG Yong-jun; GUO Yu-yuan; WU Kong-ming; WANG Wu-gang

    2002-01-01

    The contents of terpenoid aldehydes in Bt transgenic cotton and their non-Bt parental varieties were analyzed by the HPLC method. Statistical analysis of variance showed that Bt insecticidal protein Bt-ICP expression has no negative effect on the synthesis of gossypol, total heliocides and total resistant terpenoids.The results of the combined dosage test of Bt-ICP and gossypoi in vitro showed that there is no interaction between gossypol and Bt-ICP on the mortality of cotton boilworm larvae Helicoverpa armigera (Hubnner). It is indicated that the actions of Bt-ICP and gossypol on cotton bollworm are additive. Therefore, it is advantageous to combine Bt-ICP with cotton terpenoid aldehydes in controlling cotton bollworm.

  9. Clinical and morphological characteristics of cutaneous melanoma.

    Science.gov (United States)

    Balaban, Jagoda; Ninković Baroš, Djuka; Grujić, Dragana; Starović, Dragana; Ćelić, Milanka

    2014-01-01

    The incidence of cutaneous melanoma has increased significantly worldwide over the last several decades. The aim of this study is to determine clinical and morphology characteristics of primary melanoma, since some of them are important prognostic factors. This retrospective study included 172 patients. The data were collected by the Consulting team for malignant skin tumors in the Banja Luka Clinical Centre from 2009 to 2011. We did not use dermoscopy as a diagnostic tool in our investigation. We determined that melanoma occurs equally commonly in both sexes, in women in the sixth decade and the seventh in men. The most common sub-type was nodular melanoma (59.5%, P<0.05), followed by superficial spreading (27.8%) and acral lentiginous melanoma (11.4%). The most common localization was on the back in men (34.3%) and on the legs in women (P<0.05). More than half of our patients (55.8%) had melanoma thickness from 1.0 to 4.0 mm, and 38% had a melanoma thicker than 4.0 mm. The average Breslow thickness is 4.6 mm. More women than men had melanoma thicker than 4 mm (P<0.05). Spread of the primary tumor localization was found in 31.4% of patients, more frequently in men than in women (P<0.05). In most cases it was abstraction of lymph nodes (P<0.05). The average thickness of the melanoma in our patients is much higher than the average in the world and the countries of Europe. The results of this study indicate a need for better unique regional registry in this part of Bosnia and Herzegovina and improvement of preventive measures in the early diagnosis of melanoma.

  10. Inducible nitric oxide synthase (iNOS) drives mTOR pathway activation and proliferation of human melanoma by reversible nitrosylation of TSC2

    Science.gov (United States)

    Lopez-Rivera, Esther; Jayaraman, Padmini; Parikh, Falguni; Davies, Michael A.; Ekmekcioglu, Suhendan; Izadmehr, Sudeh; Milton, Denái R.; Chipuk, Jerry E.; Grimm, Elizabeth A.; Estrada, Yeriel; Aguirre-Ghiso, Julio; Sikora, Andrew G.

    2014-01-01

    Melanoma is one of the cancers of fastest-rising incidence in the world. iNOS is overexpressed in melanoma and other cancers, and previous data suggest that iNOS and nitric oxide (NO) drive survival and proliferation of human melanoma cells. However, specific mechanisms through which this occurs are poorly defined. One candidate is the PI3K/AKT/mTOR pathway, which plays a major role in proliferation, angiogenesis, and metastasis of melanoma and other cancers. We used the chick embryo chorioallantoic membrane (CAM) assay to test the hypothesis that melanoma growth is regulated by iNOS-dependent mTOR pathway activation. Both pharmacologic inhibition and siRNA-mediated gene silencing of iNOS suppressed melanoma proliferation and in vivo growth on the CAM in human melanoma models. This was associated with strong downregulation of mTOR pathway activation by Western blot analysis of p-mTOR, p-P70S6K, p-S6RP, and p-4EBP1. iNOS expression and NO were associated with reversible nitrosylation of TSC2, and inhibited dimerization of TSC2 with its inhibitory partner TSC1, enhancing GTPase activity of its target Rheb, a critical activator of mTOR signaling. Immunohistochemical analysis of tumor specimens from stage III melanoma patients showed a significant correlation between iNOS expression levels and expression of mTOR pathway members. Exogenously-supplied NO was also sufficient to reverse mTOR pathway inhibition by the B-Raf inhibitor Vemurafenib. In summary, covalent modification of TSC2 by iNOS-derived NO is associated with impaired TSC2/TSC1 dimerization, mTOR pathway activation, and proliferation of human melanoma. This model is consistent with the known association of iNOS overexpression and poor prognosis in melanoma and other cancers. PMID:24398473

  11. Identification of TDP-43 as an oncogene in melanoma and its function during melanoma pathogenesis.

    Science.gov (United States)

    Zeng, Qinghai; Cao, Ke; Liu, Rui; Huang, Jinhua; Xia, Kun; Tang, Jintian; Chen, Xiang; Zhou, Ming; Xie, Huiqing; Zhou, Jianda

    2017-01-02

    Although recent studies have revealed TAR (trans-activating response region) DNA binding protein (TDP-43) as a potential therapeutic target for cancers, its role and clinical association with melanoma have not been explored. To identify the role and function of TDP-43 during melanoma pathogenesis. Firstly, the relationship between TDP-43 expression and patient survival was explored. Then TDP-43 expression level in melanoma tissue and different melanoma cell lines was measured. After silencing TDP-43 expression in melanoma cells, the impacts of TDP-43 on cellular proliferation, metastasis, glucose uptake, and glucose transporters levels were studied. In the end, effect of TDP-43 depletion on tumorigenicity of melanoma cells was tested in vivo. Our results showed that TDP-43 was overexpressed in melanoma paraffin samples compared with that in nevi tissues. The high expression level of TDP-43 was associated with poor patient survival. By silencing TDP-43, we saw significant inhibition of cell proliferation and metastasis in A375 and WM451 cells. TDP-43 knockdown could suppress glucose transporter type-4 (GLUT4) expression and reduce glucose uptake. And downregulation of GLUT4 in melanoma cells induced inhibition of cell proliferation and metastasis. TDP-43 knockdown significantly slowed down tumor growth and decreased GLUT4 expression in vivo. TDP-43 is a novel oncogene in melanoma and regulates melanoma proliferation and metastasis potentially through modulation of glucose metabolism.

  12. Identification of isotopically manipulated cinnamic aldehyde and benzaldehyde

    Energy Technology Data Exchange (ETDEWEB)

    Culp, R.A.; Noakes, J.E. (Univ. of Georgia, Athens (USA))

    1990-05-01

    Cinnamic aldehyde and benzaldehyde samples were isolated from botanical sources and compared to labeled isolates from natural origins and those synthetically produced. Products synthesized from petrochemical precursors yielded {delta}{sup 13}C and {delta}D values uniquely different from those of botanical derivation. Upon further comparison with the radiocarbon ({sup 14}C) activities it was possible to define average {delta}{sup 13}C and {delta}D isotopic values for the naturally derived cinnamic aldehyde ({minus}27.6 {plus minus} 0.6 and {minus}116 {plus minus} 8, respectively) and benzaldehyde samples ({minus}28.6 {plus minus} 0.5 and {minus}105 {plus minus} 5, respectively) and the synthetically derived cinnamic aldehyde ({minus}25.4 {plus minus} 0.3 and 517 {plus minus} 52, respectively, via toluene oxidation) and benzaldehyde samples ({minus}29.2 {plus minus} 0.8 and {minus}54 {plus minus} 11, respectively, via benzal chloride and {minus}26.1 {plus minus} 0.6 and 576 {plus minus} 73, respectively, via toluene oxidation). It is also revealed by comparison of isotopic values for certain synthetically derived compounds that {sup 14}C manipulation of simulated natural products has occurred.

  13. Sox2 is not required for melanomagenesis, melanoma growth and melanoma metastasis in vivo.

    Science.gov (United States)

    Cesarini, V; Guida, E; Todaro, F; Di Agostino, S; Tassinari, V; Nicolis, S; Favaro, R; Caporali, S; Lacal, P M; Botti, E; Costanzo, A; Rossi, P; Jannini, E A; Dolci, S

    2017-08-01

    Melanoma is a dangerous form of skin cancer derived from the malignant transformation of melanocytes. The transcription factor SOX2 is not expressed in melanocytes, however, it has been shown to be differentially expressed between benign nevi and malignant melanomas and to be essential for melanoma stem cell maintenance and expansion in vitro and in xenograft models. By using a mouse model in which BRaf(V600E) mutation cooperates with Pten loss to induce the development of metastatic melanoma, we investigated if Sox2 is required during the process of melanomagenesis, melanoma growth and metastasis and in the acquisition of resistance to BRAF inhibitors (BRAFi) treatments. We found that deletion of Sox2 specifically in Pten null and BRafV600E-expressing melanocytes did not prevent tumor formation and did not modify the temporal kinetics of melanoma occurrence compared to Sox2 wt mice. In addition, tumor growth was similar between Sox2 wt and Sox2 deleted (del) melanomas. By querying publicly available databases, we did not find statistically significant differences in SOX2 expression levels between benign nevi and melanomas, and analysis on two melanoma patient cohorts confirmed that Sox2 levels did not significantly change between primary and metastatic melanomas. Melanoma cell lines derived from both Sox2 genotypes showed a similar sensitivity to vemurafenib treatment and the same ability to develop vemurafenib resistance in long-term cultures. Development of vemurafenib resistance was not dependent on SOX2 expression also in human melanoma cell lines in vitro. Our findings exclude an oncogenic function for Sox2 during melanoma development and do not support a role for this transcription factor in the acquisition of resistance to BRAFi treatments.

  14. Adoptive immunotherapy of advanced melanoma.

    Science.gov (United States)

    Shapira-Frommer, Ronnie; Schachter, Jacob

    2012-09-01

    Adoptive cell therapy (ACT) has emerged as an effective therapy for patients with metastatic melanoma. Since the first introduction of the protocol in 1988 [1], major improvements have been achieved with response rates of 40%-72% among patients who were resistant to previous treatment lines. Both cell product and conditioning regimen are major determinants of treatment efficacy; therefore, developing ACT protocols explore diverse ways to establish autologous intra-tumoral lymphocyte cultures or peripheral effector cells as well as different lymphodepleting regimens. While a proof of feasibility and a proof of concept had been established with previous published results, ACT will need to move beyond single-center experiences, to confirmatory, multi-center studies. If ACT is to move into widespread practice, it will be necessary to develop reproducible high quality cell production methods and accepted lymphodepleting regimen. Two new drugs, ipilimumab (Yervoy, Bristol-Myers Squibb) and vemurafenib (Zelboraf, Roche), were approved in 2011 for the treatment of metastatic melanoma based on positive phase III trials. Both drugs show a clear overall survival benefit, so the timing of when to use ACT will need to be carefully thought out. In contrast to these 2 new, commercially available outpatient treatments, ACT is a personally-specified product and labor-intensive therapy that demands both acquisition of high standard laboratory procedures and close clinical inpatient monitoring during treatment. It is unique among other anti-melanoma treatments, providing the potential for a durable response following a single, self-limited treatment. This perspective drives the efforts to make this protocol accessible for more patients and to explore modifications that may optimize treatment results.

  15. Current management and novel agents for malignant melanoma

    Directory of Open Access Journals (Sweden)

    Lee Byung

    2012-02-01

    Full Text Available Abstract Advanced malignant melanoma remains a challenging cancer. Over the past year, there have been 3 agents approved for treatment of melanoma by Food and Drug Administration. These include pegylated interferon alpha-2b for stage III melanoma, vemurafenib for unresectable or metastatic melanoma with BRAF V600E mutation, and ipilimumab for treatment of unresectable or metastatic melanoma. This review will also update on the development of novel agents, including tyrosine kinase inhibitors and adoptive cellular therapy.

  16. Chiral Phosphoric Acid Catalyzed Enantioselective Allylation of Aldehydes with Allyltrichlorosilane%Chiral Phosphoric Acid Catalyzed Enantioselective Allylation of Aldehydes with Allyltrichlorosilane

    Institute of Scientific and Technical Information of China (English)

    程柯; 范甜甜; 孙健

    2011-01-01

    Easily accessible chiral phosphoric acid lb has been applied as efficient organocatalyst for the asymmetric al- lylation of aldehydes with allyltrichlorosilane. In the presence of 20 mol% of lb, the allylation of a broad range of aldehydes proceeded smoothly to give the corresponding homoallylic alcohol with up to 87% ee and 97% yield.

  17. Metabolic engineering of glycine betaine synthesis: plant betaine aldehyde dehydrogenases lacking typical transit peptides are targeted to tobacco chloroplasts where they confer betaine aldehyde resistance.

    Science.gov (United States)

    Rathinasabapathi, B; McCue, K F; Gage, D A; Hanson, A D

    1994-01-01

    Certain higher plants synthesize and accumulate glycine betaine, a compound with osmoprotectant properties. Biosynthesis of glycine betaine proceeds via the pathway choline-->betaine aldehyde-->glycine betaine. Plants such as tobacco (Nicotiana tabacum L.) which do not accumulate glycine betaine lack the enzymes catalyzing both reactions. As a step towards engineering glycine betaine accumulation into a non-accumulator, spinach and sugar beet complementary-DNA sequences encoding the second enzyme of glycine-betaine synthesis (betaine aldehyde dehydrogenase, BADH, EC 1.2.1.8) were expressed in tobacco. Despite the absence of a typical transit peptide, BADH was targeted to the chloroplast in leaves of transgenic plants. Levels of extractable BADH were comparable to those in spinach and sugar beet, and the molecular weight, isoenzyme profile and Km for betaine aldehyde of the BADH enzymes from transgenic plants were the same as for native spinach or sugar beet BADH. Transgenic plants converted supplied betaine aldehyde to glycine betaine at high rates, demonstrating that they were able to transport betaine aldehyde across both the plasma membrane and the chloroplast envelope. The glycine betaine produced in this way was not further metabolized and reached concentrations similar to those in plants which accumulate glycine betaine naturally. Betaine aldehyde was toxic to non-transformed tobacco tissues whereas transgenic tissues were resistant due to detoxification of betaine aldehyde to glycine betaine. Betaine aldehyded ehydrogenase is therefore of interest as a potential selectable marker, as well as in the metabolic engineering of osmoprotectant biosynthesis.

  18. GRE2 from Scheffersomyces stipitis as an aldehyde reductase contributes tolerance to aldehyde inhibitors derived from lignocellulosic biomass.

    Science.gov (United States)

    Wang, Xu; Ma, Menggen; Liu, Z Lewis; Xiang, Quanju; Li, Xi; Liu, Na; Zhang, Xiaoping

    2016-08-01

    Scheffersomyces (Pichia) stipitis is one of the most promising yeasts for industrial bioethanol production from lignocellulosic biomass. S. stipitis is able to in situ detoxify aldehyde inhibitors (such as furfural and 5-hydroxymethylfurfural (HMF)) to less toxic corresponding alcohols. However, the reduction enzymes involved in this reaction remain largely unknown. In this study, we reported that an uncharacterized open reading frame PICST_72153 (putative GRE2) from S. stipitis was highly induced in response to furfural and HMF stresses. Overexpression of this gene in Saccharomyces cerevisiae improved yeast tolerance to furfural and HMF. GRE2 was identified as an aldehyde reductase which can reduce furfural to FM with either NADH or NADPH as the co-factor and reduce HMF to FDM with NADPH as the co-factor. This enzyme can also reduce multiple aldehydes to their corresponding alcohols. Amino acid sequence analysis indicated that it is a member of the subclass "intermediate" of the short-chain dehydrogenase/reductase (SDR) superfamily. Although GRE2 from S. stipitis is similar to GRE2 from S. cerevisiae in a three-dimensional structure, some differences were predicted. GRE2 from S. stipitis forms loops at D133-E137 and T143-N145 locations with two α-helices at E154-K157 and E252-A254 locations, different GRE2 from S. cerevisiae with an α-helix at D133-E137 and a β-sheet at T143-N145 locations, and two loops at E154-K157 and E252-A254 locations. This research provided guidelines for the study of other SDR enzymes from S. stipitis and other yeasts on tolerant mechanisms to aldehyde inhibitors derived from lignocellulosic biomass.

  19. Salivary aldehyde dehydrogenase - temporal and population variability, correlations with drinking and smoking habits and activity towards aldehydes contained in food.

    Science.gov (United States)

    Giebułtowicz, Joanna; Dziadek, Marta; Wroczyński, Piotr; Woźnicka, Katarzyna; Wojno, Barbara; Pietrzak, Monika; Wierzchowski, Jacek

    2010-01-01

    Fluorimetric method based on oxidation of the fluorogenic 6-methoxy-2-naphthaldehyde was applied to evaluate temporal and population variability of the specific activity of salivary aldehyde dehydrogenase (ALDH) and the degree of its inactivation in healthy human population. Analyzed was also its dependence on drinking and smoking habits, coffee consumption, and its sensitivity to N-acetylcysteine. Both the specific activity of salivary ALDH and the degree of its inactivation were highly variable during the day, with the highest activities recorded in the morning hours. The activities were also highly variable both intra- and interpersonally, and negatively correlated with age, and this correlation was stronger for the subgroup of volunteers declaring abstinence from alcohol and tobacco. Moderately positive correlations of salivary ALDH specific activity with alcohol consumption and tobacco smoking were also recorded (r(s) ~0.27; p=0.004 and r(s) =0.30; p=0.001, respectively). Moderate coffee consumption correlated positively with the inactivation of salivary ALDH, particularly in the subgroup of non-drinking and non-smoking volunteers. It was found that mechanical stimulation of the saliva flow increases the specific activity of salivary ALDH. The specific activity of the salivary ALDH was strongly and positively correlated with that of superoxide dismutase, and somewhat less with salivary peroxidase. The antioxidant-containing drug N-acetylcysteine increased activity of salivary ALDH presumably by preventing its inactivation in the oral cavity. Some food-related aldehydes, mainly cinnamic aldehyde and anisaldehyde, were excellent substrates of the salivary ALDH3A1 enzyme, while alkenals, particularly those with short chain, were characterized by lower affinity towards this enzyme but high catalytic constants. The protective role of salivary ALDH against aldehydes in food and those found in the cigarette smoke is discussed, as well as its participation in

  20. In vitro assessment of human airway toxicity from major aldehydes in automotive emissions

    Energy Technology Data Exchange (ETDEWEB)

    Grafstroem, R.C. [Karolinska Inst., Stockholm (Sweden). Inst. of Environmental Medicine

    1997-09-01

    Automotive exhausts can significantly contribute to the levels of reactive aldehydes, including formaldehyde, acetaldehyde and acrolein, in urban air. The use of alcohols as an alternative fuel for gasoline or diesel may further increase these emissions. Since it is unclear if aldehyde inhalation may induce pathological states, including cancer, in human airways, the toxic properties of the above-mentioned aldehydes were studied in cultured target cell types. Each aldehyde modified vital cellular functions in a dose-dependent manner, and invariably inhibited growth and induced abnormal terminal differentiation. Decreases of cellular thiols and increases of intracellular Ca{sup 2+} were observed, and moreover, variable types and amounts of short-lived or persistent genetic damage were induced. The concentrations required for specified levels of a particular type of injury varied up to 10000-fold among the aldehydes. Overall, distinctive patterns of cytopathological activity were observed, which differed both qualitatively and quantitatively among the aldehydes. Finally, aldehydes inhibited DNA repair processes and increased cytotoxicity and mutagenesis in synergy with other known toxicants, indicating that aldehydes may also enhance damage by other constituents in automotive exhausts. In summary, the aldehydes, notably {sup m}u{sup M}-mM formaldehyde, caused pathological effects and induced mechanisms that relate to acute toxicity and cancer development in airway epithelial cells. Since `no-effect` levels may not exist for carcinogenic agents, the overall results support a need for elimination of aldehydes in automotive exhausts. 41 refs

  1. Melanoma Brain Metastasis: Mechanisms, Models, and Medicine.

    Science.gov (United States)

    Kircher, David A; Silvis, Mark R; Cho, Joseph H; Holmen, Sheri L

    2016-09-02

    The development of brain metastases in patients with advanced stage melanoma is common, but the molecular mechanisms responsible for their development are poorly understood. Melanoma brain metastases cause significant morbidity and mortality and confer a poor prognosis; traditional therapies including whole brain radiation, stereotactic radiotherapy, or chemotherapy yield only modest increases in overall survival (OS) for these patients. While recently approved therapies have significantly improved OS in melanoma patients, only a small number of studies have investigated their efficacy in patients with brain metastases. Preliminary data suggest that some responses have been observed in intracranial lesions, which has sparked new clinical trials designed to evaluate the efficacy in melanoma patients with brain metastases. Simultaneously, recent advances in our understanding of the mechanisms of melanoma cell dissemination to the brain have revealed novel and potentially therapeutic targets. In this review, we provide an overview of newly discovered mechanisms of melanoma spread to the brain, discuss preclinical models that are being used to further our understanding of this deadly disease and provide an update of the current clinical trials for melanoma patients with brain metastases.

  2. Small bowel perforation caused by advanced melanoma.

    Science.gov (United States)

    den Uil, Sjoerd H; Thomassen, Irene; Vermeulen, Erik Gj; Vuylsteke, Ronald Jclm; Stockmann, Hein Bac; de Vries, Mattijs

    2014-01-01

    The incidence of melanoma has been increasing over the years and it remains, despite the heterogeneous survival for different stages, a disease with high mortality. Dissemination occurs primarily by the lymphatic route, followed by the hematogenous route. Gastrointestinal metastases do occur, but they are mainly intraluminal mucosal melanomas. Peritoneal or primary mucosal melanomas are rare. Only a few cases have been described of patients presenting with acute abdominal pain due to a melanoma. In this report we present a young patient with no prior health problems. Due to silent progression of disease at first, and secondarily avoidance of medical consultation, she finally presented to our emergency department with signs of intestinal perforation. In the operating theater a massive metastasis in the intestines with perforation was seen, as well as many smaller intra-abdominal and cutaneous lesions. Approximately 35 cm of jejunum had to be resected. Furthermore, the primary melanoma on the left forearm was excised and turned out to be in almost complete regression. Although initial recovery after surgery was good, the patient died only one month after presentation due to the advanced nature of her disease, which points to the devastating effect of undiagnosed melanoma and gastrointestinal metastasis. Since the melanoma incidence is rising, similar cases may present in the near future. This emphasizes the importance of proper full physical examination in patients with atypical abdominal symptoms.

  3. Normal repair of ultraviolet radiation-induced DNA damage in familial melanoma without CDKN2A or CDK4 gene mutation.

    Science.gov (United States)

    Shannon, J A; Matias, C; Luxford, C; Kefford, R F; Mann, G J

    1999-04-01

    Excessive sun exposure and family history are strong risk factors for the development of cutaneous melanoma. Inherited susceptibility to this type of skin cancer could therefore result from constitutively impaired capacity to repair ultraviolet (UV)-induced DNA lesions. While a proportion of familial melanoma kindreds exhibit germline mutations in the cell cycle regulatory gene CDKN2A (p16INK4a) or its protein target, cyclin-dependent kinase 4 (CDK4), the biochemical basis of most familial melanoma is unknown. We have examined lymphoblastoid cell lines from melanoma-affected and unaffected individuals from large hereditary melanoma kindreds which are not attributable to CDKN2A or CDK4 gene mutation. These lines were tested for sensitivity of clonogenic growth to UV radiation and for their ability to repair transfected UV-damaged plasmid templates (host cell reactivation). Two of seven affected-unaffected pairs differed in colony survival after exposure to UVB radiation; however, no significant differences were observed in the host-cell reactivation assays. These results indicate that melanoma susceptibility genes other than CDKN2A and CDK4 do not impair net capacity to repair UV-induced DNA damage.

  4. Dermoscopy on subungual melanoma 

    Directory of Open Access Journals (Sweden)

    Grażyna Kamińska-Winciorek

    2013-05-01

    Full Text Available Subungual melanoma is a rare, but one of the diagnostically most difficult variants of melanoma. Unfortunately, due to its late detection, lack of an early reaction from the patient and diagnosis in advanced stages, subungual melanoma is deemed as a prognostically unfavorable variant of this malignancy. Diagnosis of subungual melanoma is very difficult to establish merely on the basis of clinical examination due to the resemblance of subungual hematoma to melanocytic nevus, fungal or bacterial infections. Dermoscopy seems to be the ideal diagnostic tool in the differential diagnosis of this life-threatening disease. Aims. To describe the basic aspects of dermoscopy of subungual melanoma and other conditions involving the nails. Methods. Review of medical database PubMed for the literature of the last 10 years on the dermoscopic patterns of subungual melanoma and other subungual diseases. Results. We collate the fundamental rules of performing dermoscopy in subungual melanoma, as well as basic dermoscopic features and diagnostic algorithms of selected subungual lesions requiring differentiation from melanoma. Conclusions. Dermoscopy is a safe, easily repeatable diagnostic method, and the knowledge of basic dermoscopic patterns of developing melanoma in subungual localization, along with the differential diagnosis of other diseases within the nail plate, will help not only dermatologists, but also the professionals of other specialties, such as surgeons, oncologists, orthopedists, and also general practitioners.

  5. Primary retroperitoneal melanoma presented in a rare extracutaneous site for malignant melanoma

    Directory of Open Access Journals (Sweden)

    Mohamed Alsharedi

    2016-10-01

    Full Text Available Malignant melanoma, as the name implies, is a malignant tumor of melanocytes, found in the skin, eyes, meningeal lining and the mucosal epithelium of the aero-digestive and genitourinary tracts. Malignant melanoma is typically skin malignancy, which rarely presents at extracutaneous site. Here we present a rare case of primary retroperitoneal melanoma and review the findings in comparison with other cases described in literature.

  6. Uveal Melanoma Treatment and Prognostication.

    Science.gov (United States)

    Dogrusöz, Mehmet; Jager, Martine J; Damato, Bertil

    2017-01-01

    Approximately 90% of uveal melanoma develop in the choroid, with the remainder arising in the ciliary body or the iris. The treatment of uveal melanoma is aimed at conserving the eye and useful vision, and, if possible, preventing metastatic disease. Enucleation is now reserved for tumors that are large and/or involve the optic disc, having largely been replaced by various forms of radiotherapy (plaque brachy-therapy, proton beam or stereotactic radiotherapy) and laser therapy. Whereas iridectomy and iridocyclectomy are widely performed, transscleral exoresection of choroidal tumors is performed only in a few centers because it requires special skills and hypotensive anesthesia. Transretinal endoresection using vitrectomy equipment is easier but controversial because of concerns about tumor seeding. Long-term postoperative surveillance is necessary to identify and treat local tumor recurrence and any other complications, such as radiation-induced morbidity, and to provide counseling to the patient. Factors predicting metastasis include older age, large tumor size, ciliary body involvement, extraocular spread, epithelioid cytomorphology, chromosome 3 loss and chromosome 8q gain, class 2 gene expression profile, loss of BRCA1-associated protein-1 (BAP1), and the presence of inflammation. Prognostication is enhanced by multi-variable analysis combining clinical, histologic, and genetic factors, also taking the patient's age and sex into account. As there is a lack of options for treating metastases, much research is focused on identifying potential therapeutic targets. Copyright 2017 Asia-Pacific Academy of Ophthalmology.

  7. MALIGNANT MELANOMA OF THE ORAL CAVITY

    Directory of Open Access Journals (Sweden)

    Vishnu Prasad

    2016-02-01

    Full Text Available Oral malignant melanoma is a rare aggressive neoplasm commonly affects males and is more frequently seen at the level of the hard palate and gingiva. In many cases, melanoma has evolved from the pre-existing pigmented lesions. These neoplasms are biologically aggressive, but they often go unnoticed since they usually present merely as a hyperpigmented patch on the gingival surface. Performing biopsies of doubtful pigmented lesions helps in early treatment and better prognosis. The surgical excision combined with the chemotherapy is the treatment of choice. Here, we report a rare case of an elderly male patient with oral malignant melanoma with metastasis to vertebral column.

  8. Tea tree oil might combat melanoma.

    Science.gov (United States)

    Bozzuto, Giuseppina; Colone, Marisa; Toccacieli, Laura; Stringaro, Annarita; Molinari, Agnese

    2011-01-01

    In this study we present new data from experiments focused on the antitumor activity of tea tree oil (TTO), an essential oil distilled from Melaleuca alternifolia. TTO proved to be capable of inhibiting the growth of melanoma cells and of overcoming multidrug resistance (MDR), as we reported in our previous study. Moreover, the survival role of the MDR-marker P-glycoprotein appears to be involved in the mechanism of invasion of melanoma cells. The results reported herein indicate that TTO and its main active component, terpinen-4-ol, can also interfere with the migration and invasion processes of drug-sensitive and drug-resistant melanoma cells.

  9. Dermoscopic patterns of cutaneous melanoma metastases.

    Science.gov (United States)

    Rubegni, Pietro; Lamberti, Arianna; Mandato, Filomena; Perotti, Roberto; Fimiani, Michele

    2014-04-01

    In 2-8% of patients with melanoma, the first clinical manifestation of the disease may be skin metastasis. In these cases, differential diagnosis with the primary melanoma, benign melanocytic lesions, and other malignant and benign skin growths is particularly challenging. For this reason, the dermatologist's approach to cutaneous metastases of malignant melanoma calls for knowledge of the great morphological variety of these lesions. Dermoscopic characteristics associated with CMMMs have not yet been codified. The aim of the present review is to provide additional information about dermoscopic aspects of these skin lesions.

  10. Targeting Brain Metastases in Patients with Melanoma

    Directory of Open Access Journals (Sweden)

    Dionysis Papadatos-Pastos

    2013-01-01

    Full Text Available Patients with brain metastases from malignant melanoma historically have a very poor outcome. Surgery and radiotherapy can be used, but for the majority of patients the disease will progress quickly. In the recent past, patients with brain metastases derived only minimal benefit from cytotoxic chemotherapy. Novel therapies that have been shown to be superior to chemotherapy in metastatic melanoma have made their way in clinic and data regarding their use in patients with treated or untreated brain metastases are encouraging. In this paper we describe the use of vemurafenib, dabrafenib, and ipilimumab in patients with melanoma disseminated to the brain in addition to other treatments currently in development.

  11. Socioeconomic status, sunlight exposure, and risk of malignant melanoma: the Western Canada Melanoma Study.

    Science.gov (United States)

    Gallagher, R P; Elwood, J M; Threlfall, W J; Spinelli, J J; Fincham, S; Hill, G B

    1987-10-01

    In a study of 261 male melanoma patients and age-and sex-matched controls, a strong positive univariate association between socioeconomic status, as determined by usual occupation, and risk of melanoma was detected. This association, however, was substantially explained by host constitutional factors and occupational, recreational, and vacation sunlight exposure. The study demonstrated an increased risk of melanoma in draftsmen and surveyors and a reduced risk of melanoma in construction workers and individuals employed in the finance, insurance, and real estate industry even after control for the effect of host factors and sunlight exposure.

  12. Metastatic Tumor Dormancy in Cutaneous Melanoma: Does Surgery Induce Escape?

    Energy Technology Data Exchange (ETDEWEB)

    Tseng, William W. [Department of Surgery, University of California at San Francisco, 513 Parnassus Avenue, Room S-321, San Francisco, CA 94143 (United States); Fadaki, Niloofar; Leong, Stanley P., E-mail: leongsx@cpmcri.org [Department of Surgery and Center for Melanoma Research and Treatment, California Pacific Medical Center and Research Institute, 2340 Clay Street, 2nd floor, San Francisco, CA 94115 (United States)

    2011-02-21

    According to the concept of tumor dormancy, tumor cells may exist as single cells or microscopic clusters of cells that are clinically undetectable, but remain viable and have the potential for malignant outgrowth. At metastatic sites, escape from tumor dormancy under more favorable local microenvironmental conditions or through other, yet undefined stimuli, may account for distant recurrence after supposed “cure” following surgical treatment of the primary tumor. The vast majority of evidence to date in support of the concept of tumor dormancy originates from animal studies; however, extensive epidemiologic data from breast cancer strongly suggests that this process does occur in human disease. In this review, we aim to demonstrate that metastatic tumor dormancy does exist in cutaneous melanoma based on evidence from mouse models and clinical observations of late recurrence and occult transmission by organ transplantation. Experimental data underscores the critical role of impaired angiogenesis and immune regulation as major mechanisms for maintenance of tumor dormancy. Finally, we examine evidence for the role of surgery in promoting escape from tumor dormancy at metastatic sites in cutaneous melanoma.

  13. Metastatic Tumor Dormancy in Cutaneous Melanoma: Does Surgery Induce Escape?

    Directory of Open Access Journals (Sweden)

    William W. Tseng

    2011-02-01

    Full Text Available According to the concept of tumor dormancy, tumor cells may exist as single cells or microscopic clusters of cells that are clinically undetectable, but remain viable and have the potential for malignant outgrowth. At metastatic sites, escape from tumor dormancy under more favorable local microenvironmental conditions or through other, yet undefined stimuli, may account for distant recurrence after supposed “cure” following surgical treatment of the primary tumor. The vast majority of evidence to date in support of the concept of tumor dormancy originates from animal studies; however, extensive epidemiologic data from breast cancer strongly suggests that this process does occur in human disease. In this review, we aim to demonstrate that metastatic tumor dormancy does exist in cutaneous melanoma based on evidence from mouse models and clinical observations of late recurrence and occult transmission by organ transplantation. Experimental data underscores the critical role of impaired angiogenesis and immune regulation as major mechanisms for maintenance of tumor dormancy. Finally, we examine evidence for the role of surgery in promoting escape from tumor dormancy at metastatic sites in cutaneous melanoma.

  14. Nitric oxide donor augments antineoplastic effects of arginine deprivation in human melanoma cells.

    Science.gov (United States)

    Mayevska, Oksana; Chen, Oleh; Karatsai, Olena; Bobak, Yaroslav; Barska, Maryna; Lyniv, Liliana; Pavlyk, Iuliia; Rzhepetskyy, Yuriy; Igumentseva, Natalia; Redowicz, Maria Jolanta; Stasyk, Oleh

    2017-06-15

    Anticancer therapy based on recombinant arginine-degrading enzymes has been proposed for the treatment of several types of malignant cells deficient in arginine biosynthesis. One of the predicted side effects of such therapy is restricted bioavailability of nitric oxide as arginine catabolic product. Prolonged NO limitation may lead to unwanted disturbances in NO-dependent vasodilation, cardiovascular and immune systems. This problem can be overcome by co-supplementation with exogenous NO donor. However, NO may potentially counteract anticancer effects of therapy based on arginine deprivation. In this study, we evaluate for the first time the effects of an exogenous NO donor, sodium nitroprusside, on viability and metastatic properties of two human melanoma cell lines SK-MEL-28 and WM793 under arginine-deprived conditions. It was revealed that NO did not rescue melanoma cells from specific effects evoked by arginine deprivation, namely decreased viability and induction of apoptosis, dramatically reduced motility, invasiveness and clonogenic potential. Moreover, sodium nitroprusside co-treatment augmented several of these antineoplastic effects. We report that a combination of NO-donor and arginine deprivation strongly and specifically impaired metastatic behavior of melanoma cells. Thus, sodium nitroprusside can be considered as an adjuvant for the more efficient treatment of malignant melanoma and possibly other tumors with arginine-degrading enzymes. Copyright © 2017 Elsevier Inc. All rights reserved.

  15. Application of heterocyclic aldehydes as components in Ugi–Smiles couplings

    Directory of Open Access Journals (Sweden)

    Katelynn M. Mason

    2016-09-01

    Full Text Available Efficient one-pot Ugi–Smiles couplings are reported for the use of furyl-substituted aldehyde components. In the presence of these heterocyclic aldehydes, reactions tolerated variations in amine components and led to either isolated N-arylamide Ugi–Smiles adducts or N-arylepoxyisoindolines, products of tandem Ugi–Smiles Diels–Alder cyclizations, in moderate yields. A thienyl-substituted aldehyde was also a competent component for Ugi–Smiles adduct formation.

  16. Research advances in the catalysts for the selective oxidation of ethane to aldehydes

    Institute of Scientific and Technical Information of China (English)

    ZHANG Zhe; ZHAO Zhen; XU Chunming

    2005-01-01

    Selective oxidation of ethane to aldehydes is one of the most difficult processes in the catalysis researches of low alkanes. The development of selective oxidation of ethane to aldehydes (formaldehyde, acetaldehyde and acrolein) is discussed. The latest progress of the catalysts, including bulk or supported metal oxide catalysts, highly dispersed and isolated active sites catalysts, and the photo-catalytic ethane oxidation catalysts, partial oxidation of ethane in the gas phase, and the proposed reaction pathways from ethane to aldehydes are involved.

  17. Application of heterocyclic aldehydes as components in Ugi–Smiles couplings

    Science.gov (United States)

    Mason, Katelynn M; Meyers, Michael S; Fox, Abbie M

    2016-01-01

    Summary Efficient one-pot Ugi–Smiles couplings are reported for the use of furyl-substituted aldehyde components. In the presence of these heterocyclic aldehydes, reactions tolerated variations in amine components and led to either isolated N-arylamide Ugi–Smiles adducts or N-arylepoxyisoindolines, products of tandem Ugi–Smiles Diels–Alder cyclizations, in moderate yields. A thienyl-substituted aldehyde was also a competent component for Ugi–Smiles adduct formation. PMID:27829908

  18. Interstellar Aldehydes and their corresponding Reduced Alcohols: Interstellar Propanol?

    Science.gov (United States)

    Etim, Emmanuel; Chakrabarti, Sandip Kumar; Das, Ankan; Gorai, Prasanta; Arunan, Elangannan

    2016-07-01

    There is a well-defined trend of aldehydes and their corresponding reduced alcohols among the known interstellar molecules; methanal (CH_2O) and methanol (CH_3OH); ethenone (C_2H_2O) and vinyl alcohol (CH_2CHOH); ethanal (C_2H_4O) and ethanol(C_2H_5OH); glycolaldehyde (C_2H_4O_2) and ethylene glycol(C_2H_6O_2). The reduced alcohol of propanal (CH_3CH_2CHO) which is propanol (CH_3CH_2CH_2OH) has not yet been observed but its isomer; ethyl methyl ether (CH_3CH_2OCH_3) is a known interstellar molecule. In this article, different studies are carried out in investigating the trend between aldehydes and their corresponding reduced alcohols and the deviation from the trend. Kinetically and with respect to the formation route, alcohols could have been produced from their corresponding reduced aldehydes via two successive hydrogen additions. This is plausible because of (a) the unquestionable high abundance of hydrogen, (b) presence of energy sources within some of the molecular clouds and (c) the ease at which successive hydrogen addition reaction occurs. In terms of stability, the observed alcohols are thermodynamically favorable as compared to their isomers. Regarding the formation process, the hydrogen addition reactions are believed to proceed on the surface of the interstellar grains which leads to the effect of interstellar hydrogen bonding. From the studies, propanol and propan-2-ol are found to be more strongly attached to the surface of the interstellar dust grains which affects its overall gas phase abundance as compared to its isomer ethyl methyl ether which has been observed.

  19. Direct bony invasion of malignant melanoma

    Directory of Open Access Journals (Sweden)

    Mula Viswanath

    2009-01-01

    Full Text Available Malignant melanoma is known to spread by local extention, by the lymphatics by the blood stream. Direct invasion of the bone from a cutaneous melanoma is unknown. Hence, this case is presented in view of its rarity. A 75-year-old Caucasian lady presented with a small papillary lesion in the region of a recurrent chronic cellulitis on the lower third of the lateral aspect of the right leg. Histopathology diagnosed the lesion as locally advanced malignant melanoma. Radiological investigations by X-ray and magnetic resonance imaging revealed malignant infiltration of the tibia in its mid and lower third with two soft tissue metastatic masses adjacent. Histology following amputation confirmed malignant melanoma with cranial resection margin involvement. She underwent a further above-knee amputation followed by chemotherapy. The patient recovered from the amputation but subsequently died 6 months later due to bronchopneumonia from lung metastasis.

  20. Updates in Therapy for Advanced Melanoma.

    Science.gov (United States)

    Singh, Bhavana P; Salama, April K S

    2016-01-15

    Cutaneous melanoma is one of the most aggressive forms of skin cancer, and is correlated with a large proportion of skin cancer-related deaths. Therapy for cutaneous melanoma has advanced greatly through careful identification of therapeutic targets and the development of novel immunotherapeutic approaches. The identification of BRAF as well as other driver mutations, have allowed for a specialized approach to treatment. In addition, immune checkpoint inhibition has dramatically changed the treatment landscape over the past 5-10 years. The successful targeting of CTLA-4, as well as PD-1/PD-L1, has been translated into meaningful clinical benefit for patients, with multiple other potential agents in development. Systemic therapy for cutaneous melanoma is becoming more nuanced and often takes a multifaceted strategy. This review aims to discuss the benefits and limitations of current therapies in systemic melanoma treatment as well as areas of future development.

  1. Pembrolizumab superior to ipilimumab in melanoma.

    Science.gov (United States)

    2015-06-01

    In the first randomized trial to compare FDA-approved immune checkpoint inhibitors as first-line therapy for patients with advanced melanoma, pembrolizumab yielded significantly better treatment outcomes than ipilimumab.

  2. Pembrolizumab for Ipilimumab-Resistant Melanoma

    Science.gov (United States)

    KEYNOTE-002 was designed to test the safety and efficacy of two doses of pembrolizumab compared with chemotherapy in patients with ipilimumab-resistant melanoma; interim results show that pembrolizumab improves progression-free survival for these patients

  3. Nivolumab-Based Treatments for Advanced Melanoma

    Science.gov (United States)

    A summary of results from an international, double-blind, randomized phase III trial testing the combination of nivolumab (Opdivo®) and ipilimumab (Yervoy®) against nivolumab alone and ipilimumab alone in patients with advanced melanoma.

  4. Metastatic malignant subungal melanoma: Importance of FNAC

    Directory of Open Access Journals (Sweden)

    Radhika Punshi Nandwani

    2014-01-01

    Full Text Available Subungual melanoma is a rare type of skin cancer. It is an uncommon form of acral lentiginous melanoma. Approximately 85% of cases are misdiagnosed initially, and it is generally associated with a poor prognosis. Herein, we describe a case of metastatic subungal melanoma to the axillary lymph node in a 45-year-old male. Diagnosis of metastasis was made based on cytology, where the clinicians were guided to search for primary. This case report highlights the role of fine-needle aspiration cytology (FNAC in the diagnosis of this entity to draw the attention of the reader to the possible underreporting of melanoma because of a variant that evades diagnosis and our reluctance to think about its existence.

  5. [Molecular alterations in melanoma and targeted therapies].

    Science.gov (United States)

    Mourah, Samia; Lebbé, Céleste

    2014-12-01

    Melanoma is a skin cancer whose incidence is increasing steadily. The recent discovery of frequent and recurrent genetic alterations in cutaneous melanoma allowed a molecular classification of tumors into distinct subgroups, and paved the way for targeted therapy. Several signaling pathways are involved in the progression of this disease with oncogenic mutations affecting signaling pathways: MAPK, PI3K, cAMP and cyclin D1/CDK4. In each of these pathways, several potential therapeutic targets have been identified and specific inhibitors have already been developed and have shown clinical efficacy. The use of these inhibitors is often conditioned by tumors genotyping. In France, melanomas genotyping is supported by the platforms of the National Cancer Institute (INCA), which implemented a national program ensuring access to innovation for personalized medicine. The identification of new targets in melanoma supplies a very active dynamic development of innovative molecules contributing to changing the therapeutic landscape of this pathology.

  6. The State of Melanoma: Challenges and Opportunities

    Science.gov (United States)

    Merlino, Glenn; Herlyn, Meenhard; Fisher, David E.; Bastian, Boris C.; Flaherty, Keith T.; Davies, Michael A.; Wargo, Jennifer A.; Curiel-Lewandrowski, Clara; Weber, Michael J.; Leachman, Sancy A.; Soengas, Maria S.; McMahon, Martin; Harbour, J. William; Swetter, Susan M.; Aplin, Andrew E.; Atkins, Michael B.; Bosenberg, Marcus W.; Dummer, Reinhard; Gershenwald, Jeff; Halpern, Allan C.; Herlyn, Dorothee; Karakousis, Giorgos C.; Kirkwood, John M.; Krauthammer, Michael; Lo, Roger S.; Long, Georgina V.; McArthur, Grant; Ribas, Antoni; Schuchter, Lynn; Sosman, Jeffrey A.; Smalley, Keiran S.; Steeg, Patricia; Thomas, Nancy E.; Tsao, Hensin; Tueting, Thomas; Weeraratna, Ashani; Xu, George; Lomax, Randy; Martin, Alison; Silverstein, Steve; Turnham, Tim; Ronai, Ze’ev A.

    2017-01-01

    The Melanoma Research Foundation (MRF) has charted a comprehensive assessment of the current state of melanoma research and care. Intensive discussions among members of the MRF Scientific Advisory Council and Breakthrough Consortium, a group that included clinicians and scientists, focused on four thematic areas—diagnosis/early detection, prevention, tumor cell dormancy (including metastasis) and therapy (response and resistance). These discussions extended over the course of 2015 and culminated at the Society of Melanoma Research 2015 International Congress in November. Each of the four groups has outlined their thoughts per the current status, challenges and opportunities in the four respective areas. The current state and immediate and long-term needs of the melanoma field, from basic research to clinical management, are presented in the following report. PMID:27087480

  7. Recent developments in nanomedicine for melanoma treatment.

    Science.gov (United States)

    Tang, Jian-Qin; Hou, Xiao-Yang; Yang, Chun-Sheng; Li, Ya-Xi; Xin, Yong; Guo, Wen-Wen; Wei, Zhi-Ping; Liu, Yan-Qun; Jiang, Guan

    2017-08-15

    Melanoma is a most aggressive skin cancer with limited therapeutic options and its incidence is increasing rapidly in recent years. The discovery and application of new targeted therapy agents have shown significant benefits. However, adverse side-effects and resistance to chemotherapy remain formidable challenges in the clinical treatment of malignant melanoma. Nanotherapeutics offers an important prospect of overcoming these drawbacks. The anti-tumoral applications of nanomedicine are varied, including those in chemotherapy, RNA interference, photothermal therapy, and photodynamic therapy. Furthermore, nanomedicine allows delivery of the effector structures into the tumor site via passive or active targeting, thereby allowing increased therapeutic specificity and reduced side effects. In this review, we summarize the latest developments in the application of nanocarrier-mediated targeted drug delivery to melanoma and nanomedicine-related clinical trials in melanoma treatment. We also discuss existing problems and opportunities for future developments, providing direction and new thoughts for further studies. © 2017 UICC.

  8. DNA-Templated Introduction of an Aldehyde Handle in Proteins

    DEFF Research Database (Denmark)

    Kodal, Anne Louise Bank; Rosen, Christian Bech; Mortensen, Michael Rosholm;

    2016-01-01

    -templated reductive amination we create DNA-protein conjugates with control over labeling stoichiometry without genetic engineering. A guiding DNA strand with a metal-binding functionality facilitates site-selectivity by directing coupling of a second reactive DNA strand to the vicinity of a protein metal......-binding site. Here, we demonstrate DNA-templated reductive amination for His6-tagged proteins and native metal-binding proteins, including IgG1 antibodies. We also use a cleavable linker between the DNA and the protein to remove the DNA and introduce a single aldehyde to proteins. This functions as a handle...

  9. Electron transmission through a class of anthracene aldehyde molecules

    Science.gov (United States)

    Petreska, Irina; Ohanesjan, Vladimir; Pejov, Ljupco; Kocarev, Ljupco

    2016-03-01

    Transmission of electrons via metal-molecule-metal junctions, involving rotor-stator anthracene aldehyde molecules is investigated. Two model barriers having input parameters evaluated from accurate ab initio calculations are proposed and the transmission coefficients are obtained by using the quasiclassical approximation. Transmission coefficients further enter in the integral for the net current, utilizing Simmons' method. Conformational dependence of the tunneling processes is evident and the presence of the side groups enhances the functionality of the future single-molecule based electronic devices.

  10. Nuclear alkylated pyridine aldehyde polymers and conductive compositions thereof

    Science.gov (United States)

    Rembaum, A.; Singer, S. (Inventor)

    1970-01-01

    A thermally stable, relatively conductive polymer was disclosed. The polymer was synthesized by condensing in the presence of catalyst a 2, 4, or 6 nuclear alklylated 2, 3, or 4 pyridine aldehyde or quaternary derivatives thereof to form a polymer. The pyridine groups were liked by olefinic groups between 2-4, 2-6, 2-3, 3-4, 3-6 or 4-6 positions. Conductive compositions were prepared by dissolving the quaternary polymer and an organic charge transfer complexing agent such as TCNQ in a mutual solvent such as methanol.

  11. Hydrogenations without Hydrogen: Titania Photocatalyzed Reductions of Maleimides and Aldehydes

    Directory of Open Access Journals (Sweden)

    David W. Manley

    2014-09-01

    Full Text Available A mild procedure for the reduction of electron-deficient alkenes and carbonyl compounds is described. UVA irradiations of substituted maleimides with dispersions of titania (Aeroxide P25 in methanol/acetonitrile (1:9 solvent under dry anoxic conditions led to hydrogenation and production of the corresponding succinimides. Aromatic and heteroaromatic aldehydes were reduced to primary alcohols in similar titania photocatalyzed reactions. A mechanism is proposed which involves two proton-coupled electron transfers to the substrates at the titania surface.

  12. Piperidine Promoted Regioselective Synthesis of α, β-unsaturated Aldehydes

    Directory of Open Access Journals (Sweden)

    *A. H. Banday

    2013-03-01

    Full Text Available An efficient, facile and regioselective synthesis of α,β-unsaturated aldehydes from β-hydroxynitriles is reported. The reaction is carried out using DIBAL-H and promoted by piperidine under dry conditions at a temperature of -78 oC and can be described as a concomitant reduction-elimination reaction. The same reaction if carried out in the absence of piperidine gives mainly the uneliminated reduction product. The products formed are of immense importance as synthons in a large number of chemical reactions and biological processes.

  13. ADSORPTION OF UNSATURATED ALDEHYDES ON TiO2

    OpenAIRE

    Natalia Ortega; Oswaldo Núñez

    2012-01-01

    In this work, the unsaturated aldehydes adsorption on TiO2 surface was studied. To test their efficiency as catalyst, experiments on heterogeneous photocatalysis of p-nitrophenol (PNP) and a sample obtained from an oil industry effluent were carried out using a solar simulator and modified-TiO2 systems. The systems of TiO2 used were: TiO2 pure (without modifying) and TiO2-dienal systems constituted by the chemical adsorption of 2,4 hexadienal, 2,4 heptadienal and trans-cinamaldehyde on the su...

  14. Interferon-associated retinopathy in a patient with metastatic melanoma

    Directory of Open Access Journals (Sweden)

    Lara Borrego-Sanz

    2014-10-01

    Full Text Available We present the unusual case of a 35 year-old woman with stage IV melanoma and widespread metastases, who was undergoing treatment with interferon alpha-2b and who presented with interferon-associated retinopathy. The patient, who had been taking interferon treatment for three months, complained of a sudden loss of visual acuity in the left eye. An ocular examination revealed multiple cotton wool spots along the retina and macular involvement. Interferon treatment was suspended. Although rare, retinopathy represents a potentially serious adverse effect of interferon treatment. Although normally patients are asymptomatic, complications derived of its use may arise, which can lead to significant visual impairment. We therefore suggest that before initiating treatment with this drug, patients should be informed of its potential ocular risks, and that regular eye examinations are conducted along with the treatment.

  15. A Case of Melanoma Associated Leukoderma

    Directory of Open Access Journals (Sweden)

    Özer Arıcan

    2010-06-01

    Full Text Available Melanoma associated leukoderma is a rare disease characterized by hypopigmented or depigmented macules, which are usualy localized at distant sites from the primary malignant melonoma. Immunologic response to abnormal melanocytes is thought to be responsible for the physiopathology of the disease. A 34-year- old male patient with a facially localized melanoma associated leukoderma is presented and the clinical features, pathogenesis, differential diagnosis, treatment and follow-up of the disease are discussed with the recent literature.

  16. Ipilimumab til behandling af metastaserende melanoma

    DEFF Research Database (Denmark)

    Ghasemi, Habib; Schmidt, Henrik; Stolle, Lars Bjørn

    2015-01-01

    Until recently metastatic melanoma was a disease with limited treatment options and a poor prognosis. However, new promising products have been developed. Ipilimumab, a full human anti-cytotoxic T-lymphocyte antigen-4 antibody, has shown improved survival in several clinical trials and is now...... a part of the standard treatment options for this disease in Denmark. In this case report we present a 78-year-old man with metastatic melanoma who had complete remission after treatment with ipilimumab....

  17. TERT promoter mutations in melanoma survival.

    Science.gov (United States)

    Nagore, Eduardo; Heidenreich, Barbara; Rachakonda, Sívaramakrishna; Garcia-Casado, Zaida; Requena, Celia; Soriano, Virtudes; Frank, Christoph; Traves, Victor; Quecedo, Esther; Sanjuan-Gimenez, Josefa; Hemminki, Kari; Landi, Maria Teresa; Kumar, Rajiv

    2016-07-01

    Despite advances in targeted therapies, the treatment of advanced melanoma remains an exercise in disease management, hence a need for biomarkers for identification of at-risk primary melanoma patients. In this study, we aimed to assess the prognostic value of TERT promoter mutations in primary melanomas. Tumors from 300 patients with stage I/II melanoma were sequenced for TERT promoter and BRAF/NRAS mutations. Cumulative curves were drawn for patients with and without mutations with progression-free and melanoma-specific survival as outcomes. Cox proportional hazard regression models were used to determine the effect of the mutations on survivals. Individually, presence of TERT promoter and BRAF/NRAS mutations associated with poor disease-free and melanoma-specific survival with modification of the effect by the rs2853669 polymorphism within the TERT promoter. Hazard ratio (HR) for simultaneous occurrence of TERT promoter and BRAF/NRAS mutations for disease-free survival was 2.3 (95% CI 1.2-4.4) and for melanoma-specific survival 5.8 (95% CI 1.9-18.3). The effect of the mutations on melanoma-specific survival in noncarriers of variant allele of the polymorphism was significant (HR 4.5, 95% CI 1.4-15.2) but could not be calculated for the carriers due to low number of events. The variant allele per se showed association with increased survival (HR 0.3, 95% CI 0.1-0.9). The data in this study provide preliminary evidence that TERT promoter mutations in combination with BRAF/NRAS mutations can be used to identify patients at risk of aggressive disease and the possibility of refinement of the classification with inclusion of the rs2853669 polymorphism within TERT promoter.

  18. [Histological findings in an irradiated choroidal melanoma].

    Science.gov (United States)

    Koinzer, S; Hasselbach, H; Bräsen, J H; Leuschner, I; Roider, J

    2011-06-01

    Histological findings of choroidal melanomas after proton beam irradiation have been reported for complicated cases after enucleation. We present specimens of a tumor after transretinal probe excision. One year after irradiation, the biopsy was examined histologically. The specimens showed pigmented, spindle-shaped cells staining positively for Melan-A and HMB-45. Ki-67 showed low proliferation. Caspase-3 staining was normal. The melanoma still contained vital and even single proliferating cells, but regressed afterwards without additional therapy.

  19. Genital melanoma: prognosis factors and treatment modality.

    Science.gov (United States)

    Ferraioli, Domenico; Lamblin, Gery; Mathevet, Patrice; Hetu, Jessika; Berakdar, Isabelle; Beurrier, Frederic; Chopin, Nicolas

    2016-11-01

    Genital melanoma is a rare pathology. We present the experience of two comprehensive cancer centers in Lyon (France) in the management of genital melanoma in order to identify prognostic factors and optimal treatments. Between April 1992 and Mars 2014, 16 patients with a primary genital melanoma were referred to our department. Nine patients presented a vaginal melanoma, six vulvar melanomas and only one cervical melanoma. The median dimension of the lesion was 33.7 mm (5-100 mm). The AJCC stage ranged from IB to IIIC. 12 cases were the classic dark-blue flat melanoma and the other 4 cases were an atypical amelanotic tumor. Wide local surgery was performed in nine patients. A radical surgery was performed in six patients. In the large cervical melanoma, radiotherapy was performed as first-line treatment. In all the patients regional lymph node staging was performed. Adjuvant treatment was realized in nine patients. Two patients are alive without recurrence. Only one patient was lost to the first follow-up. The other 13 patients experienced a rapid recurrence. The median disease-free survival and the median overall survival were 11.8 months (2-49 m) and of 30.4 m (11-144 m), respectively. The disease-free survival and overall survival could be linked to a clinical presentation (Breslow thickness and morphology of lesion) associated to the early diagnosis. In our small series, the most important prognosis factor remains the tumor thickness. These rare lesions should be treated in experienced centers in order to improve their prognostic.

  20. Synchronous melanomas arising within nevus spilus*

    Science.gov (United States)

    de Brito, Maria Helena Toda Sanches; Dionísio, Cecília Silva Nunes de Moura; Fernandes, Cândida Margarida Branco Martins; Ferreira, Joana Cintia Monteiro; Rosa, Maria Joaninha Madalena de Palma Mendonça da Costa; Garcia, Maria Manuela Antunes Pecegueiro da Silva

    2017-01-01

    Nevus spilus is a melanocytic cutaneous lesion consisting of a light brown background macule with numerous superimposed darker maculopapular speckles. Melanoma arising from a nevus spilus is rare, with less than 40 cases reported to date. The absolute risk for malignant transformation is not well defined, lacking a standardized management approach. We report a new case of melanoma arising from nevus spilus, with the additional peculiarity of multifocality. We offer our recommendations for the management of the condition. PMID:28225967

  1. Verrucous-Keratotic Malignant Melanoma (VKMM).

    Science.gov (United States)

    Damianov, Nikolay; Tronnier, Michael; Koleva, Nely; Wollina, Uwe; Gianfaldoni, Serena; Lotti, Torello; Lotti, Jacopo; França, Katlein; Batashki, Atanas; Mangarov, Hristo; Tchernev, Georgi

    2017-07-25

    We report a patient with a verrucous keratotic variant of melanoma visiting the policlinic of Medical Institute of Ministry of Interior (MVR-Sofia), Department of Dermatology and Dermatologic surgery, with a keratotic verrucous lesion, located on the right thigh, partially deeply pigmented at upper right quadrant. The lesion had appeared three years ago before her presentation in the policlinic, and it had gradually enlarged and become darker in the last twelve months. The surface of the lesion was covered with thick hyperkeratotic lobules. The histologic evaluation revealed verrucous melanoma with a tumour thickness of 3 mm and Clark Level IV and focal ulceration. The tumour was staged as stage IIB (T3bN0M0). Sentinel lymph node biopsy was planned. Verrucous-keratotic forms of malignant melanoma occur more commonly in women and favour the extremities, but may be found on any anatomic site. Seventy-one percent of this melanoma type are situated on the upper and lower extremities. Although two-thirds of these neoplasms can be can be histologically graded according to the classification of Clark, one-third of these melanomas with marked verrucous hyperplasia and hyperkeratosis of the epidermis do not fit into his classification. Histological classification of patients with a verrucous keratotic type of melanoma may sometimes be extremely difficult. The marked papilliferous architecture of these lesions made an assessment of Breslow depth difficult. The presented case highlights the clinical existence and features of such benign-looking melanomas. It is therefore important for surgical pathologists to recognise this unusual variant of malignant melanoma, as it may be confused both clinically and pathologically with benign lesions.

  2. Novel anti-melanoma treatment:focus on immunotherapy

    Institute of Scientific and Technical Information of China (English)

    Meng-Ze Hao; Wen-Ya Zhou; Xiao-Ling Du; Ke-Xin Chen; Guo-Wen Wang; Yun Yang; Ji-Long Yang

    2014-01-01

    Melanoma is an intractable cancer that is aggressive, lethal, and metastatic. The prognosis of advanced melanoma is very poor because it is insensitive to chemotherapy and radiotherapy. The incidence of melanoma has been ascending stably for years worldwide, accompanied by increasing mortality. New approaches to managing this deadly disease are much anticipated to enhance the cure rate and to extend clinical benefits to patients with metastatic melanoma. Due to its high degree of immunogenicity, melanoma could be a good target for immunotherapy, which has been developed for decades and has achieved certain progress. This article provides an overview of immunotherapy for melanoma.

  3. Spitzoid Melanoma: A Ten Year-Old Boy

    Directory of Open Access Journals (Sweden)

    Işıl Kılınç Karaarslan

    2008-01-01

    Full Text Available Spitzoid melanoma is a rare variant of melanoma, in which the clinical and histopathologic diagnoses are difficult. Data on the features of Spitzoid melanoma in children is limited in the literature, since melanoma is rarely seen in childhood. Here, we report a 10 year-old child with a Spitzoid melanoma. By the means of this case, it has been emphasized that melanoma should be considered in the differential diagnosis of vascular lesions even seen in childhood, unless the clinical and dermoscopic features are characteristic for an entity. (Journal of Current Pediatrics 2008; 6: 127-9

  4. High-Dose Recombinant Interferon Alfa-2B, Ipilimumab, or Pembrolizumab in Treating Patients With Stage III-IV High Risk Melanoma That Has Been Removed by Surgery

    Science.gov (United States)

    2016-10-10

    Metastatic Non-Cutaneous Melanoma; Non-Cutaneous Melanoma; Recurrent Melanoma of the Skin; Recurrent Non-Cutaneous Melanoma; Stage III Mucosal Melanoma of the Head and Neck; Stage IIIA Skin Melanoma; Stage IIIB Skin Melanoma; Stage IIIC Skin Melanoma; Stage IV Skin Melanoma; Stage IVA Mucosal Melanoma of the Head and Neck; Stage IVB Mucosal Melanoma of the Head and Neck; Stage IVC Mucosal Melanoma of the Head and Neck

  5. MITF-independent pro-survival role of BRG1-containing SWI/SNF complex in melanoma cells.

    Directory of Open Access Journals (Sweden)

    Lubica Ondrušová

    Full Text Available Metastasized malignant melanoma has a poor prognosis because of its intrinsic resistance to chemotherapy and radiotherapy. The central role in the melanoma transcriptional network has the transcription factor MITF (microphthalmia-associated transcription factor. It has been shown recently that the expression of MITF and some of its target genes require the SWI/SNF chromatin remodeling complex. Here we demonstrate that survival of melanoma cells requires functional SWI/SNF complex not only by supporting expression of MITF and its targets and but also by activating expression of prosurvival proteins not directly regulated by MITF. Microarray analysis revealed that besides the MITF-driven genes, expression of proteins like osteopontin, IGF1, TGFß2 and survivin, the factors known to be generally associated with progression of tumors and the antiapoptotic properties, were reduced in acute BRG1-depleted 501mel cells. Western blots and RT-PCR confirmed the microarray findings. These proteins have been verified to be expressed independently of MITF, because MITF depletion did not impair their expression. Because these genes are not regulated by MITF, the data suggests that loss of BRG1-based SWI/SNF complexes negatively affects survival pathways beyond the MITF cascade. Immunohistochemistry showed high expression of both BRM and BRG1 in primary melanomas. Exogenous CDK2, osteopontin, or IGF1 each alone partly relieved the block of proliferation imposed by BRG1 depletion, implicating that more factors, besides the MITF target genes, are involved in melanoma cell survival. Together these results demonstrate an essential role of SWI/SNF for the expression of MITF-dependent and MITF-independent prosurvival factors in melanoma cells and suggest that SWI/SNF may be a potential and effective target in melanoma therapy.

  6. Thigmotropism of Malignant Melanoma Cells

    Directory of Open Access Journals (Sweden)

    Pascale Quatresooz

    2012-01-01

    Full Text Available During malignant melanoma (MM progression including incipient metastasis, neoplastic cells follow some specific migration paths inside the skin. In particular, they progress along the dermoepidermal basement membrane, the hair follicles, the sweat gland apparatus, nerves, and the near perivascular space. These features evoke the thigmotropism phenomenon defined as a contact-sensing growth of cells. This process is likely connected to modulation in cell tensegrity (control of the cell shape. These specifically located paucicellular aggregates of MM cells do not appear to be involved in the tumorigenic growth phase, but rather they participate in the so-called “accretive” growth model. These MM cell collections are often part of the primary neoplasm, but they may, however, correspond to MM micrometastases and predict further local overt metastasis spread.

  7. Mucosal melanoma of the head and neck.

    Science.gov (United States)

    Ascierto, Paolo Antonio; Accorona, Remo; Botti, Gerardo; Farina, Davide; Fossati, Piero; Gatta, Gemma; Gogas, Helen; Lombardi, Davide; Maroldi, Roberto; Nicolai, Piero; Ravanelli, Marco; Vanella, Vito

    2017-04-01

    Mucosal melanoma of the head and neck is a very rare and aggressive malignancy with a very poor prognosis. The nasal cavity, paranasal sinuses, and oral cavity are the most common locations. One-, 3- and 5-year survival rates between 2000 and 2007 were 63%, 30% and 20%, respectively. Cigarette smoking seems to be a risk factor even though the evidence for this is very low. Clinical signs and symptoms are usually nonspecific. While surgery is considered the mainstay of treatment for most mucosal melanomas of the head and neck region, radiotherapy has a role in local control of the disease after surgery. Many new treatment options in the last years, in particular targeted therapies (i.e. inhibitors of c-KIT, NRAS/MEK or BRAF) and immunotherapies (anti CTLA-4 and anti PD-1/PD-L1 antibodies), have changed the history of cutaneous melanoma. Despite the different biology, mucosal melanoma is currently treated in the same way as cutaneous melanoma; however, patients with mucosal melanoma were excluded from the majority of recent clinical trials. Recent molecular findings offer new hope for the development of more effective systemic therapy. Copyright © 2017 Elsevier B.V. All rights reserved.

  8. Targeting Sphingosine Kinase-1 To Inhibit Melanoma

    Science.gov (United States)

    Madhunapantula, SubbaRao V.; Hengst, Jeremy; Gowda, Raghavendra; Fox, Todd E.; Yun, Jong K; Robertson, Gavin P.

    2012-01-01

    SUMMARY Resistance to therapies develops rapidly for melanoma leading to more aggressive disease. Therefore, agents are needed that specifically inhibit proteins or pathways controlling the development of this disease, which can be combined, dependent on genes deregulated in a particular patient’s tumors. This study shows that elevated sphingosine-1-phosphate (S-1-P) levels resulting from increased activity of sphingosine kinase-1 (SPHK1) occur in advanced melanomas. Targeting SPHK1 using siRNA decreased anchorage dependent and independent growth as well as sensitized melanoma cells to apoptosis inducing agents. Pharmacological SPHK1 inhibitors SKI-I but not SKI-II decreased S-1-P content, elevated ceramide levels, caused a G2-M block and induced apoptotic cell death in melanomas. Targeting SPHK1 using siRNA or the pharmacological agent called SKI-I, decreased the levels of pAKT. Furthermore, SKI-I inhibited the expression of CYCLIN D1 protein and increased the activity of caspase-3/7, which in turn led to the degradation of PARP. In animals, SKI-I but not SKI-II retarded melanoma growth by 25-40%. Thus, targeting SPHK1 using siRNAs or SKI-I has therapeutic potential for melanoma treatment either alone or in combination with other targeted agents. PMID:22236408

  9. Treatment and outcomes of anorectal melanoma.

    LENUS (Irish Health Repository)

    Heeney, Anna

    2012-02-01

    INTRODUCTION: anorectal melanoma is an uncommon disease constituting less than 3% of all melanomas. Due to its rarity, there are a lack of randomized control trials regarding appropriate management and current evidence is based mainly on retrospective studies. METHODS: in view of the controversial surgical treatment of anorectal melanoma, we review the most published literature in an attempt to elucidate its typical clinical features along with current thinking with respect to management approaches to this aggressive disease. Using the keywords "anorectal" and "malignant melanoma", a medline search of all articles in English was performed and the relevant articles procured. Additional references were retrieved by cross reference from key articles. RESULTS: anorectal melanoma affects the elderly with a slight preponderance for females. It commonly presents disguised as benign disease with local bleeding or suspicion for haemorrhoidal disease. There is no convincing evidence to indicate that radical resection of primary anorectal melanoma is associated with improvement in local control or survival, and local excision is an acceptable treatment option. CONCLUSION: optimum management depends on several factors and the therapeutic goals should be to lengthen survival and preserve quality-of-life. Given that wide local excision is a more limited intervention with comparable survival it should be considered as the initial treatment choice. Unfortunately prognosis for patients with this disease remains poor despite choice of treatment strategy with overall five year disease-free survival less than twenty percent in most studies.

  10. [Systemic treatment of inoperable metastasized malignant melanoma].

    Science.gov (United States)

    Gutzmer, R; Rauschenberg, R; Meier, F

    2016-07-01

    The medical therapy of inoperable malignant melanoma has changed dramatically over the last few years. The purpose of this article is to summarize the current state of systemic medical treatment of malignant melanoma. Clinical studies and guidelines in the therapy of malignant melanoma are reviewed. Medical therapy of inoperable melanoma changed due to developments in immunotherapies (checkpoint inhibitors) and molecular-targeted therapies (BRAF and MEK inhibitors). Checkpoint inhibitors are antibodies administered as infusions every 2-3 weeks, blocking the checkpoints PD-1 or CTLA-4, thus, preventing downregulation of the immune system. BRAF and MEK inhibitors are small molecules, they are given orally and block a certain signaling pathway in tumor cells. The activation of this pathway has to be demonstrated by molecular analysis of tumor tissue first. This strategy is currently registered for 40-50 % of melanomas harboring a BRAF V600 mutation, while the combination of a BRAF plus MEK inhibitor has been proven more efficient than a BRAF inhibitor alone. A fascinating development has started in the melanoma field due to immunotherapeutic and molecular-targeted treatment strategies. The continuation of this development needs further clinical and translational studies. This includes particular clinical studies with the new substances in the adjuvant situation, and sequences and combinations in the metastatic setting. Translational studies are needed to develop biomarkers for response and side effects.

  11. Intratumoral Approaches for the Treatment of Melanoma.

    Science.gov (United States)

    Bommareddy, Praveen K; Silk, Ann W; Kaufman, Howard L

    There have been significant advances in the immunotherapy of melanoma over the last decade. The tumor microenvironment is now known to promote an immune-suppressive milieu that can block effective immune-mediated tumor rejection. Several novel strategies designed to overcome local immunosuppression hold promise for treatment of melanoma and other cancers. These approaches include oncolytic viruses, plasmid DNA delivery, Toll-like receptor agonists, inflammatory dyes, cytokines, checkpoint inhibitors, immunomodulatory agents, and host and pathogenic cell-based vectors. In addition, there are several novel methods for local drug delivery, including direct injection, image-guided, electroporation, and nanodelivery techniques under study. The approval of talimogene laherparepvec (Imlygic), an attenuated, recombinant oncolytic herpesvirus, for melanoma treatment is the first intratumoral agent to receive regulatory approval for the treatment of patients with melanoma. This review will focus on the rationale for intratumoral treatment in melanoma, describe the clinical and safety data for some of the agents in clinical development, and provide a perspective for future clinical investigation with intratumoral approaches. Melanoma has been a paradigm tumor for progress in targeted therapy and immunotherapy and will likely also be the tumor to establish the therapeutic role of intratumoral treatment for cancer.

  12. Preventive effects of Chlorella on skeletal muscle atrophy in muscle-specific mitochondrial aldehyde dehydrogenase 2 activity-deficient mice.

    Science.gov (United States)

    Nakashima, Yuya; Ohsawa, Ikuroh; Nishimaki, Kiyomi; Kumamoto, Shoichiro; Maruyama, Isao; Suzuki, Yoshihiko; Ohta, Shigeo

    2014-10-11

    Oxidative stress is involved in age-related muscle atrophy, such as sarcopenia. Since Chlorella, a unicellular green alga, contains various antioxidant substances, we used a mouse model of enhanced oxidative stress to investigate whether Chlorella could prevent muscle atrophy. Aldehyde dehydrogenase 2 (ALDH2) is an anti-oxidative enzyme that detoxifies reactive aldehydes derived from lipid peroxides such as 4-hydroxy-2-nonenal (4-HNE). We therefore used transgenic mice expressing a dominant-negative form of ALDH2 (ALDH2*2 Tg mice) to selectively decrease ALDH2 activity in the muscles. To evaluate the effect of Chlorella, the mice were fed a Chlorella-supplemented diet (CSD) for 6 months. ALDH2*2 Tg mice exhibited small body size, muscle atrophy, decreased fat content, osteopenia, and kyphosis, accompanied by increased muscular 4-HNE levels. The CSD helped in recovery of body weight, enhanced oxidative stress, and increased levels of a muscle impairment marker, creatine phosphokinase (CPK) induced by ALDH2*2. Furthermore, histological and histochemical analyses revealed that the consumption of the CSD improved skeletal muscle atrophy and the activity of the mitochondrial cytochrome c oxidase. This study suggests that long-term consumption of Chlorella has the potential to prevent age-related muscle atrophy.

  13. A novel temozolomide analog, NEO212, with enhanced activity against MGMT-positive melanoma in vitro and in vivo.

    Science.gov (United States)

    Chen, Thomas C; Cho, Hee-Yeon; Wang, Weijun; Nguyen, Jenny; Jhaveri, Niyati; Rosenstein-Sisson, Rachel; Hofman, Florence M; Schönthal, Axel H

    2015-03-28

    The alkylating agent temozolomide (TMZ) represents an important component of current melanoma therapy, but overexpression of O6-methyl-guanine DNA methyltransferase (MGMT) in tumor cells confers resistance to TMZ and impairs therapeutic outcome. We investigated a novel perillyl alcohol (POH)-conjugated analog of TMZ, NEO212, for its ability to exert anticancer activity against MGMT-positive melanoma cells. Human melanoma cells with variable MGMT expression levels were treated with NEO212, TMZ, or perillyl alcohol in vitro and in vivo, and markers of DNA damage and apoptosis, and tumor cell growth were investigated. NEO212 displayed substantially greater anticancer activity than any of the other treatments. It reduced colony formation of MGMT-positive cells up to eight times more effectively than TMZ, and much more potently induced DNA damage and cell death. In a nude mouse tumor model, NEO212 showed significant activity against MGMT-positive melanoma, whereas TMZ, or a mix of TMZ plus POH, was ineffective. At the same time, NEO212 was well tolerated. NEO212 may have potential as a more effective therapy for advanced melanoma, and should become particularly suitable for the treatment of patients with MGMT-positive tumors.

  14. Current guidelines in melanoma treatment. Melanoma Working Group of Gent and Bordet.

    Science.gov (United States)

    Brochez, L; Verhaeghe, E; Sales, F; Del Marmol, V; Deraemaecker, R; Vossaert, K; Naeyaert, J M

    2000-01-01

    This article focuses on the actual management of cutaneous melanoma, dealing both with established, internationally well-accepted standard procedures and interventions which are still being investigated. It wants to offer a global picture to the dermatologist of what is currently available in the therapeutic arsenal against melanoma.

  15. Sporadic naturally occurring melanoma in dogs as a preclinical model for human melanoma.

    Science.gov (United States)

    Simpson, R Mark; Bastian, Boris C; Michael, Helen T; Webster, Joshua D; Prasad, Manju L; Conway, Catherine M; Prieto, Victor M; Gary, Joy M; Goldschmidt, Michael H; Esplin, D Glen; Smedley, Rebecca C; Piris, Adriano; Meuten, Donald J; Kiupel, Matti; Lee, Chyi-Chia R; Ward, Jerrold M; Dwyer, Jennifer E; Davis, Barbara J; Anver, Miriam R; Molinolo, Alfredo A; Hoover, Shelley B; Rodriguez-Canales, Jaime; Hewitt, Stephen M

    2014-01-01

    Melanoma represents a significant malignancy in humans and dogs. Different from genetically engineered models, sporadic canine melanocytic neoplasms share several characteristics with human disease that could make dogs a more relevant preclinical model. Canine melanomas rarely arise in sun-exposed sites. Most occur in the oral cavity, with a subset having intra-epithelial malignant melanocytes mimicking the in situ component of human mucosal melanoma. The spectrum of canine melanocytic neoplasia includes benign lesions with some analogy to nevi, as well as invasive primary melanoma, and widespread metastasis. Growing evidence of distinct subtypes in humans, differing in somatic and predisposing germ-line genetic alterations, cell of origin, epidemiology, relationship to ultraviolet radiation and progression from benign to malignant tumors, may also exist in dogs. Canine and human mucosal melanomas appear to harbor BRAF, NRAS, and c-kit mutations uncommonly, compared with human cutaneous melanomas, although both species share AKT and MAPK signaling activation. We conclude that there is significant overlap in the clinical and histopathological features of canine and human mucosal melanomas. This represents opportunity to explore canine oral cavity melanoma as a preclinical model.

  16. Hereditary Melanoma: Update on Syndromes and Management - Genetics of familial atypical multiple mole melanoma syndrome

    Science.gov (United States)

    Soura, E.; Eliades, P.; Shannon, K.; Stratigos, A.; Tsao, H.

    2015-01-01

    Malignant melanoma is considered the most lethal skin cancer if not detected and treated at its early stages. About 10% of melanoma patients report a family history of melanoma; however, individuals with features of true hereditary melanoma (i.e. unilateral lineage, multi-generational, multiple primary lesions, and early onset of disease) are in fact quite rare. Although many new loci have been implicated in hereditary melanoma, CDKN2A mutations remain the most common. Familial melanoma in the presence of multiple atypical nevi should raise suspicion for a germline CDKN2A mutation. Such patients have a high risk of developing multiple primary melanomas and internal organ malignancies especially pancreatic cancer; thus, a multidisciplinary approach is necessary in many cases. The value of dermoscopy examination and total body photography performed at regular intervals has been suggested by a number of studies, and should therefore be considered for these patients and their first degree relatives. In addition, genetic counseling with the possibility of testing can be a valuable adjunct for familial melanoma patients. But, this must be performed with care and only by qualified individuals trained in cancer risk analysis. PMID:26892650

  17. Cuprous oxide nanoparticle-inhibited melanoma progress by targeting melanoma stem cells.

    Science.gov (United States)

    Yu, Bin; Wang, Ye; Yu, Xinlu; Zhang, Hongxia; Zhu, Ji; Wang, Chen; Chen, Fei; Liu, Changcheng; Wang, Jingqiang; Zhu, Haiying

    2017-01-01

    Recent studies have shown that metal and metal oxide have a potential function in antitumor therapy. Our previous studies demonstrated that cuprous oxide nanoparticles (CONPs) not only selectively induce apoptosis of tumor cells in vitro but also inhibit the growth and metastasis of melanoma by targeting mitochondria with little hepatic and renal toxicities in mice. As a further study, our current research revealed that CONPs induced apoptosis of human melanoma stem cells (CD271(+/high) cells) in A375 and WM266-4 melanoma cell lines and could significantly suppress the expression of MITF, SOX10 and CD271 involved in the stemness maintenance and tumorigenesis of melanoma stem cells. CD271(+/high) cells could accumulate more CONPs than CD271(-/low) through clathrin-mediated endocytosis. In addition, lower dosage of CONPs exhibited good anti-melanoma effect by decreasing the cell viability, stemness and tumorigenesis of A375 and WM266-4 cells through reducing the expression of SOX10, MITF, CD271 and genes in MAPK pathway involved in tumor progression. Finally, CONPs obviously suppressed the growth of human melanoma in tumor-bearing nonobese diabetic-severe combined immunodeficiency (NOD-SCID) mice, accompanied with tumors structural necrosis and fibrosis remarkably and decreased expression of CD271, SOX10 and MITF. These results above proved the effectiveness of CONPs in inhibiting melanoma progress through multiple pathways, especially through targeting melanoma stem cells.

  18. [ Spectrum of oncogene mutations is different in melanoma subtypes].

    Science.gov (United States)

    Mazurenko, N N; Tsyganova, I V; Lushnikova, A A; Ponkratova, D A; Anurova, O A; Cheremushkin, E A; Mikhailova, I N; Demidov, L V

    2015-01-01

    Melanoma is the most lethal malignancy of skin, which is comprised of clinically relevant molecular subsets defined by specific "driver" mutations in BRAF, NRAS, and KIT genes. Recently, the better results in melanoma treatment were obtained with the mutation-specific inhibitors that have been developed for clinical use and target only patients with particular tumor genotypes. The aim of the study was to characterize the spectrum of "driver" mutations in melanoma subtypes from 137 patients with skin melanoma and 14 patients with mucosal melanoma. In total 151 melanoma cases, the frequency of BRAF, NRAS, KIT, PDGFRA, and KRAS mutations was 55.0, 10.6, 4.0, 0.7, and 0.7%, respectively. BRAF mutations were found in 69% of cutaneous melanoma without UV exposure and in 43% of cutaneous melanoma with chronic UV exposure (p=0.045), rarely in acral and mucosal melanomas. Most of melanomas containing BRAF mutations, V600E (92%) and V600K (6.0%) were potentially sensitive to inhibitors vemurafenib and dabrafenib. NRAS mutations were more common in cutaneous melanoma with chronic UV exposure (26.0%), in acral and mucosal melanomas; the dominant mutations being Q61R/K/L (87.5%). KIT mutations were found in cutaneous melanoma with chronic UV exposure (8.7%) and mucosal one (28.6%), but not in acral melanoma. Most of KIT mutations were identified in exon 11; these tumors being sensitive to tyrosine kinase inhibitors. This is the first monitoring of BRAF, NRAS, KIT, PDGFRA, and KRAS hotspot mutations in different subtypes of melanoma for Russian population. On the base of data obtained, one can suppose that at the molecular level melanomas are heterogeneous tumors that should be tested for "driver" mutations in the each case for evaluation of the potential sensitivity to target therapy. The obtained results were used for treatment of melanoma patients.

  19. Daidzin: a potent, selective inhibitor of human mitochondrial aldehyde dehydrogenase.

    Science.gov (United States)

    Keung, W M; Vallee, B L

    1993-02-15

    Human mitochondrial aldehyde dehydrogenase (ALDH-I) is potently, reversibly, and selectively inhibited by an isoflavone isolated from Radix puerariae and identified as daidzin, the 7-glucoside of 4',7-dihydroxyisoflavone. Kinetic analysis with formaldehyde as substrate reveals that daidzin inhibits ALDH-I competitively with respect to formaldehyde with a Ki of 40 nM, and uncompetitively with respect to the coenzyme NAD+. The human cytosolic aldehyde dehydrogenase isozyme (ALDH-II) is nearly 3 orders of magnitude less sensitive to daidzin inhibition. Daidzin does not inhibit human class I, II, or III alcohol dehydrogenases, nor does it have any significant effect on biological systems that are known to be affected by other isoflavones. Among more than 40 structurally related compounds surveyed, 12 inhibit ALDH-I, but only prunetin and 5-hydroxydaidzin (genistin) combine high selectivity and potency, although they are 7- to 15-fold less potent than daidzin. Structure-function relationships have established a basis for the design and synthesis of additional ALDH inhibitors that could both be yet more potent and specific.

  20. The Complete Molecular Geometry of Salicyl Aldehyde from Rotational Spectroscopy

    Science.gov (United States)

    Dorosh, O.; Bialkowska-Jaworska, E.; Kisiel, Z.; Pszczolkowski, L.; Kanska, M.; Krygowski, T. M.; Maeder, H.

    2013-06-01

    Salicyl aldehyde is a well known planar molecule containing an internal hydrogen bond. In preparing the publication of our previous report of the study of its rotational spectrum we have taken the opportunity to update the structure determination of this molecule to the complete r_e^{SE} geometry. The molecule contains 15 atoms and we have used supersonic expansion FTMW spectroscopy to obtain rotational constants for a total 26 different isotopic species, including all singly substitued species relative to the parent molecule. The ^{13}C and ^{18}O substitutions were measured in natural abundance, while deuterium substitutions were carried out synthetically. The r_e^{SE} determination requires the calculation of vibration-rotation changes in rotational constants from an ab initio anharmonic force field, which necessitates some compromises in the level of calculation for a molecule of the size of salicyl aldehyde. For this reason we studied the five lowest vibrationally excited states, by using the combination of room-temperature mm-wave spectroscopy and waveguide Fourier transform cm-wave spectroscopy. The experimental excited state rotational constants were then used to calibrate the anharmonic force field calculation. The resulting r_e^{SE} geometry is compared with other types of geometry determination possible from this data, with emphasis on the effect of the near zero principal coordinate of the important C_2 atom. Z.Kisiel et al., 61^{st} OSU Symposium on Molecular Spectroscopy, The Ohio State University, Ohio 2006, RI-12.

  1. Melanoma

    Science.gov (United States)

    ... to prevent skin cancer is to reduce your exposure to sunlight. Ultraviolet light is most intense between 10 a.m. and 4 p.m. Try to avoid sun exposure during these hours. Protect your skin by wearing ...

  2. Melanoma

    Science.gov (United States)

    ... a type of cancer that begins in the melanocytes. Melanocytes are skin cells that produce melanin, the pigment that gives skin its color. Melanocytes commonly cluster together to form skin growths called ...

  3. Melanoma

    Science.gov (United States)

    ... Boards study tools Online Learning Center Meetings and events Make a difference Career planning Media Relations Toolkit AAD apps Academy meeting Chronic urticaria—for members Chronic urticaria—for public Dermatology World Dialogues in Dermatology JAAD Mohs AUC ...

  4. AC-93253 triggers the downregulation of melanoma progression markers and the inhibition of melanoma cell proliferation.

    Science.gov (United States)

    Karwaciak, Iwona; Gorzkiewicz, Michal; Ryba, Katarzyna; Dastych, Jaroslaw; Pulaski, Lukasz; Ratajewski, Marcin

    2015-07-01

    A major challenge in anti-melanoma therapy is to develop treatments that are effective for advanced melanoma patients. Unfortunately, the currently used regimens are not efficient and have unsatisfactory effects on disease progression, thus increasing the pressure to develop new, profitable drugs and to identify new molecular targets. Here, we show for the first time that AC-93253, a SIRT2 inhibitor, exerts a negative effect on the expression of a set of genes involved in the progression and chemoresistance (e.g., oncogenes, apoptosis-related genes, ABC transporter genes, and cell cycle control genes) of melanoma cells. Furthermore, melanoma cells exposed to AC-93253 and doxorubicin displayed altered biological responses, including apoptosis and proliferation, compared to cells exposed to single treatments. Taken together, we conclude that the usage of AC-93253 in combined therapy could be a promising strategy for melanoma patients.

  5. Melanoma risk perception and prevention behavior among African-Americans: the minority melanoma paradox

    Directory of Open Access Journals (Sweden)

    Goldenberg A

    2015-08-01

    Full Text Available Alina Goldenberg,1 Igor Vujic,2,3 Martina Sanlorenzo,2,4 Susana Ortiz-Urda2 1Department of Internal Medicine/Dermatology, University of California, San Diego, 2Mt Zion Cancer Research Center, University of California San Francisco, San Francisco, CA, USA; 3Department of Dermatology, The Rudolfstiftung Hospital, Academic Teaching Hospital, Medical University Vienna, Vienna, Austria; 4Section of Dermatology, Department of Medical Sciences, University of Turin, Turin, Italy Introduction: Melanoma is the most deadly type of skin cancer with 75% of all skin cancer deaths within the US attributed to it. Risk factors for melanoma include ultraviolet exposure, genetic predisposition, and phenotypic characteristics (eg, fair skin and blond hair. Whites have a 27-fold higher incidence of melanoma than African-Americans (AA, but the 5-year survival is 17.8% lower for AA than Whites. It is reported continuously that AA have more advanced melanomas at diagnosis, and overall lower survival rates. This minority melanoma paradox is not well understood or studied. Objective: To explore further, the possible explanations for the difference in melanoma severity and survival in AA within the US. Methods: Qualitative review of the literature. Results: Lack of minority-targeted public education campaigns, low self-risk perception, low self-skin examinations, intrinsic virulence, vitamin D differences, and physician mistrust may play a role in the melanoma survival disparity among AA. Conclusion: Increases in public awareness of melanoma risk among AA through physician and media-guided education, higher index of suspicion among individuals and physicians, and policy changes can help to improve early detection and close the melanoma disparity gap in the future. Keywords: acral, advanced, African-American, disparity, melanoma, survival

  6. Nail apparatus melanoma: a diagnostic opportunity Melanoma do aparelho ungueal: uma oportunidade diagnóstica

    Directory of Open Access Journals (Sweden)

    Ana Maria Carreño

    2013-04-01

    Full Text Available Malignant Melanoma is a high mortality neoplasm. The involvement of the nail apparatus is rare, with only 2 out of 3 patients seeking medical attention as the result of recent nail melanocytic lesions. This results in late diagnosis and a prognosis worse than cutaneous melanoma. We report a female, presenting with ulcerative lesions with clinical and laboratory features compatible with leishmaniasis. On return after treatment initiation a longitudinal melanonychia was observed on her first right finger. Biopsy of the nail matrix was performed. Histopathology was compatible with melanoma in situ. Longitudinal melanonychia is not a specific sign for melanoma and it is important that the dermatologist should identify the suspect lesions correctly. The incidental diagnosis of nail melanoma in situ in our case significantly impacted the patient's survival.Melanoma Maligno é uma neoplasia de alta mortalidade, sendo raro o acometimento do aparelho ungueal. Apenas 2/3 dos pacientes procuram atendimento médico devido lesão melanocítica ungueal recente, tornando o diagnóstico tardio e com prognóstico pior que do melanoma cutâneo. Descreve-se um caso de paciente sexo feminino, apresentando lesões ulceradas com características clínico-laboratoriais compatíveis com leishmaniose tegumentar americana. No retorno após início do tratamento foi observada melanoníquia longitudinal no primeiro quirodáctilo direito. Realizada biópsia da matriz ungueal com histopatológico compatível com melanoma in situ. Melanoníquia longitudinal não é sinal específico de melanoma. A identificação das lesões suspeitas é importante tarefa dos dermatologistas. O diagnóstico incidental de melanoma ungueal in situ do caso relatado resultou em grande impacto na sobrevida da paciente.

  7. A Novel NADPH-Dependent Aldehyde Reductase Gene from Saccharomyces cerevisiae NRRL Y-12632 Involved in the Detoxification of Aldehyde Inhibitors Derived from Lignocellulosic Biomass Conversion

    Science.gov (United States)

    Aldehyde inhibitors such as furfural, 5-hydroxymethylfurfural (HMF), anisaldehyde, benzaldehyde, cinnamaldehyde, and phenylaldehyde are commonly generated during lignocellulosic biomass conversion process for low-cost cellulosic ethanol production that interferes with subsequent microbial growth and...

  8. Melanoma Cell Adhesion and Migration Is Modulated by the Uronyl 2-O Sulfotransferase

    Science.gov (United States)

    Nikolovska, Katerina; Spillmann, Dorothe; Haier, Jörg; Ladányi, Andrea; Stock, Christian; Seidler, Daniela G.

    2017-01-01

    Although the vast majority of melanomas are characterized by a high metastatic potential, if detected early, melanoma can have a good prognostic outcome. However, once metastasised, the prognosis is bleak. We showed previously that uronyl-2-O sulfotransferase (Ust) and 2-O sulfation of chondroitin/dermatan sulfate (CS/DS) are involved in cell migration. To demonstrate an impact of 2-O sulfation in metastasis we knocked-down Ust in mouse melanoma cells. This significantly reduced the amount of Ust protein and enzyme activity. Furthermore, in vitro cell motility and adhesion were significantly reduced correlating with the decrease of cellular Ust protein. Single cell migration of B16VshUst(16) cells showed a decreased cell movement phenotype. The adhesion of B16V cells to fibronectin depended on α5β1 but not αvβ3 integrin. Inhibition of glycosaminoglycan sulfation or blocking fibroblast growth factor receptor (FgfR) reduced α5 integrin in B16V cell lines. Interestingly, FgfR1 expression and activation was reduced in Ust knock-down cells. In vivo, pulmonary metastasis of B16VshUst cells was prevented due to a reduction of α5 integrin. As a proof of concept UST knock-down in human melanoma cells also showed a reduction in ITGa5 and adhesion. This is the first study showing that Ust, and consequently 2-O sulfation of the low affinity receptor for FgfR CS/DS, reduces Itga5 and leads to an impaired adhesion and migration of melanoma cells. PMID:28107390

  9. uPA/uPAR system activation drives a glycolytic phenotype in melanoma cells.

    Science.gov (United States)

    Laurenzana, Anna; Chillà, Anastasia; Luciani, Cristina; Peppicelli, Silvia; Biagioni, Alessio; Bianchini, Francesca; Tenedini, Elena; Torre, Eugenio; Mocali, Alessandra; Calorini, Lido; Margheri, Francesca; Fibbi, Gabriella; Del Rosso, Mario

    2017-09-15

    In this manuscript, we show the involvement of the uPA/uPAR system in the regulation of aerobic glycolysis of melanoma cells. uPAR over-expression in human melanoma cells controls an invasive and glycolytic phenotype in normoxic conditions. uPAR down-regulation by siRNA or its uncoupling from integrins, and hence from integrin-linked tyrosine kinase receptors (IL-TKRs), by an antagonist peptide induced a striking inhibition of the PI3K/AKT/mTOR/HIF1α pathway, resulting into impairment of glucose uptake, decrease of several glycolytic enzymes and of PKM2, a checkpoint that controls metabolism of cancer cells. Further, binding of uPA to uPAR regulates expression of molecules that govern cell invasion, including extracellular matrix metallo-proteinases inducer (EMPPRIN) and enolase, a glycolytyc enzyme that also serves as a plasminogen receptor, thus providing a common denominator between tumor metabolism and phenotypic invasive features. Such effects depend on the α5β1-integrin-mediated uPAR connection with EGFR in melanoma cells with engagement of the PI3K-mTOR-HIFα pathway. HIF-1α trans-activates genes whose products mediate tumor invasion and glycolysis, thus providing the common denominator between melanoma metabolism and its invasive features. These findings unveil a unrecognized interaction between the invasion-related uPAR and IL-TKRs in the control of glycolysis and disclose a new pharmacological target (i.e., uPAR/IL-TKRs axis) for the therapy of melanoma. © 2017 UICC.

  10. Melanoma Rates Rise in Some States, Fall in Others

    Science.gov (United States)

    ... page: https://medlineplus.gov/news/fullstory_162797.html Melanoma Rates Rise in Some States, Fall in Others ... THURSDAY, Dec. 29, 2016 (HealthDay News) -- Rates of melanoma cases and deaths are either rising or falling, ...

  11. U.S. Melanoma Rate Is Rising, Study Finds

    Science.gov (United States)

    ... https://medlineplus.gov/news/fullstory_162673.html U.S. Melanoma Rate Is Rising, Study Finds 1 in every ... developing the potentially deadly skin cancer known as melanoma than in the past, new research shows. In ...

  12. Some Melanoma Survivors Still Seek Out the Sun

    Science.gov (United States)

    ... https://medlineplus.gov/news/fullstory_163887.html Some Melanoma Survivors Still Seek Out the Sun 1 in ... Even after surviving the potentially deadly skin cancer melanoma, some people continue to go out in the ...

  13. Is Full Lymph Node Removal Always Needed for Melanoma?

    Science.gov (United States)

    ... Is Full Lymph Node Removal Always Needed for Melanoma? Survival was just as long for those who ... all lymph nodes in the vicinity of a melanoma skin cancer may not increase a patient's overall ...

  14. Functional Implication of Netrin Expression in Malignant Melanoma

    Directory of Open Access Journals (Sweden)

    Simone Kaufmann

    2009-01-01

    Full Text Available Background: Malignant melanoma cells are known to have altered expression of genes supporting proliferation and invasion, however, the expression of molecules of the Netrin family of repellent factors has not been analyzed in melanomas until now.

  15. Screening for metastatic malignant melanoma of the uvea revisited

    DEFF Research Database (Denmark)

    Eskelin, Sebastian; Pyrhönen, Seppo; Summanen, Paula

    1999-01-01

    ophthalmology, malignant uveal melanoma, metastasis, liver, screening, ultrasonography, X-ray, lactate dehydrogenase, alkaline phosphatase, aminotransferases......ophthalmology, malignant uveal melanoma, metastasis, liver, screening, ultrasonography, X-ray, lactate dehydrogenase, alkaline phosphatase, aminotransferases...

  16. Biogenic aldehyde(s) derived from the action of monoamine oxidase may mediate the antidipsotropic effect of daidzin.

    Science.gov (United States)

    Keung, W M

    2001-01-30

    Daidzin, a major active principle of an ancient herbal treatment for 'alcohol addiction', was first shown to suppress ethanol intake in Syrian golden hamsters. Since then this activity has been confirmed in Wistar rats, Fawn hooded rats, genetically bred alcohol preferring P rats and African green moneys under various experimental conditions, including two-level operant, two-bottle free-choice, limited access, and alcohol-deprivation paradigms. In vitro, daidzin is a potent and selective inhibitor of mitochondrial aldehyde dehydrogenase (ALDH-2). However, in vivo, it does not affect overall acetaldehyde metabolism in golden hamsters. Using isolated hamster liver mitochondria and 5-hydroxytryptamine (5-HT) and dopamine (DA) as the substrates, we demonstrated that daidzin inhibits the second but not the first step of the MAO/ALDH-2 pathway, the major pathway that catalyzes monoamine metabolism in mitochondria. Correlation studies using structural analogs of daidzin led to the hypothesis that the mitochondrial MAO/ALDH-2 pathway may be the site of action of daidzin and that one or more biogenic aldehydes such as 5-hydroxyindole-3-acetaldehyde (5-HIAL) and/or DOPAL derived from the action of monoamine oxidase (MAO) may be mediators of its antidipsotropic action.

  17. Visual Impairment

    Science.gov (United States)

    ... What Causes Visual Impairment? People rarely lose their eyesight during their teen years. When they do, it's ... inflammation in the eye. It's often found in poor rural countries that have overcrowded living conditions and ...

  18. GLO1 Overexpression in Human Malignant Melanoma

    Science.gov (United States)

    Bair, Warner B; Cabello, Christopher M; Uchida, Koji; Bause, Alexandra S; Wondrak, Georg T

    2010-01-01

    Glyoxalase I [lactoylglutathione lyase (EC 4.4.1.5) encoded by GLO1] is a ubiquitous cellular defense enzyme involved in the detoxification of methylglyoxal, a cytotoxic byproduct of glycolysis. Accumulative evidence suggests an important role of GLO1 expression in protection against methylglyoxal-dependent protein adduction and cellular damage associated with diabetes, cancer, and chronological aging. Based on the hypothesis that GLO1 upregulation may play a functional role in glycolytic adaptations of cancer cells, we examined GLO1 expression status in human melanoma tissue. Quantitative RT-PCR analysis of a cDNA tissue array containing 40 human melanoma tissues (stages III and IV) and 13 healthy controls revealed pronounced upregulation of GLO1 expression at the mRNA level. Immunohistochemical analysis of a melanoma tissue microarray confirmed upregulation of glyoxalase 1 protein levels in malignant melanoma tissue versus healthy human skin. Consistent with an essential role of GLO1 in melanoma cell defense against methylglyoxal cytotoxicity, siRNA interference targeting GLO1-expression (siGLO1) sensitized A375 and G361 human metastatic melanoma cells towards the antiproliferative, apoptogenic, and oxidative stress-inducing activity of exogenous methylglyoxal. Protein adduction by methylglyoxal was increased in siGLO1-transfected cells as revealed by immunodetection using a monoclonal antibody directed against the major methylglyoxal-derived epitope argpyrimidine that detected a single band of methylglyoxal-adducted protein in human LOX, G361, and A375 total cell lysates. Using 2D-proteomics followed by mass spectrometry the methylglyoxal-adducted protein was identified as heat shock protein 27 (Hsp27; HSPB1). Taken together, our data suggest a function of GLO1 in the regulation of detoxification and target-adduction by the glycolytic byproduct methylglyoxal in malignant melanoma. PMID:20093988

  19. β-Cyclodextrin promoted oxidation of aldehydes to carboxylic acids in water

    Institute of Scientific and Technical Information of China (English)

    Dong Po Shi; Hong Bing Ji

    2009-01-01

    A facile,efficient and substrate-selective oxidation of aldehydes to carboxylic acids with NaC10 catalyzed by β-cyclodextdn in water has been developed.A series of aldehydes which could form inclusion complex with β-cyclodextrin(β-CD)were oxidized selectively with excellent yields.

  20. Threshold responses in cinnamic-aldehyde-sensitive subjects: results and methodological aspects

    DEFF Research Database (Denmark)

    Johansen, J D; Andersen, Klaus Ejner; Rastogi, S C

    1996-01-01

    Cinnamic aldehyde is an important fragrance material and contact allergen. The present study was performed to provide quantitative data on the eliciting capacity of cinnamic aldehyde, to be considered in assessment of clinical relevance and health hazard. The skin response to serial dilution patc...

  1. Metal-Free Direct Oxidation of Aldehydes to Esters Using TCCA.

    Science.gov (United States)

    Gaspa, Silvia; Porcheddu, Andrea; De Luca, Lidia

    2015-08-07

    Aromatic and aliphatic aldehydes are simply converted into esters by an efficient oxidative esterification carried out under mild conditions. The aldehydes are converted in situ into their corresponding acyl chlorides, which are then reacted with primary and secondary aliphatic, benzylic, allylic, and propargylic alcohols and phenols. A variety of esters are obtained in high yields.

  2. Direct chemoselective synthesis of glyconanoparticles from unprotected reducing glycans and glycopeptide aldehydes

    DEFF Research Database (Denmark)

    Thygesen, Mikkel Boas; Sørensen, Kasper Kildegaard; Cló, Emiliano

    2009-01-01

    Chemoselective oxime coupling was used for facile conjugation of unprotected, reducing glycans and glycopeptide aldehydes with core-shell gold nanoparticles carrying reactive aminooxy groups on the organic shell.......Chemoselective oxime coupling was used for facile conjugation of unprotected, reducing glycans and glycopeptide aldehydes with core-shell gold nanoparticles carrying reactive aminooxy groups on the organic shell....

  3. Branched chain aldehydes: production and breakdown pathways and relevance for flavour in foods

    NARCIS (Netherlands)

    Smit, B.A.; Engels, W.J.M.; Smit, G.

    2009-01-01

    Branched aldehydes, such as 2-methyl propanal and 2- and 3-methyl butanal, are important flavour compounds in many food products, both fermented and non-fermented (heat-treated) products. The production and degradation of these aldehydes from amino acids is described and reviewed extensively in lite

  4. Effect of whey protein on the In Vivo Release of Aldehydes.

    NARCIS (Netherlands)

    Weel, K.G.C.; Boelrijk, A.E.M.; Burger, J.J.; Claassen, N.E.; Gruppen, H.; Voragen, A.G.J.

    2003-01-01

    Retention of aldehydes by whey proteins in solutions buffered at a range of pH values was studied under static and dynamic headspace conditions and in vivo in exhaled air. Static headspace measurements showed a clear increase in retention in the presence of whey proteins for aldehydes with longer ca

  5. Effects of cooking method, cooking oil, and food type on aldehyde emissions in cooking oil fumes.

    Science.gov (United States)

    Peng, Chiung-Yu; Lan, Cheng-Hang; Lin, Pei-Chen; Kuo, Yi-Chun

    2017-02-15

    Cooking oil fumes (COFs) contain a mixture of chemicals. Of all chemicals, aldehydes draw a great attention since several of them are considered carcinogenic and formation of long-chain aldehydes is related to fatty acids in cooking oils. The objectives of this research were to compare aldehyde compositions and concentrations in COFs produced by different cooking oils, cooking methods, and food types and to suggest better cooking practices. This study compared aldehydes in COFs produced using four cooking oils (palm oil, rapeseed oil, sunflower oil, and soybean oil), three cooking methods (stir frying, pan frying, and deep frying), and two foods (potato and pork loin) in a typical kitchen. Results showed the highest total aldehyde emissions in cooking methods were produced by deep frying, followed by pan frying then by stir frying. Sunflower oil had the highest emissions of total aldehydes, regardless of cooking method and food type whereas rapeseed oil and palm oil had relatively lower emissions. This study suggests that using gentle cooking methods (e.g., stir frying) and using oils low in unsaturated fatty acids (e.g., palm oil or rapeseed oil) can reduce the production of aldehydes in COFs, especially long-chain aldehydes such as hexanal and t,t-2,4-DDE. Copyright © 2016 Elsevier B.V. All rights reserved.

  6. Subretinal lipid exudation associated with untreated choroidal melanoma

    Directory of Open Access Journals (Sweden)

    C K Minija

    2011-01-01

    Full Text Available Subretinal lipid exudation in an untreated choroidal melanoma is very rare. It is seen following plaque radiotherapy in choroidal melanoma. There is only one case report of untreated choroidal melanoma with massive lipid exudation in a patient with metastatic hypernephroma. We report here a rare case of untreated choroidal melanoma with lipid exudation. Subretinal exudation that is rarely seen following plaque brachytherapy was noted at the borders of this untreated tumor. Lipid exudation partially resolved following brachytherapy.

  7. Jejuno-jejunal invagination due to intestinal melanoma

    Institute of Scientific and Technical Information of China (English)

    Giuseppe Resta; Gianfranco Azzena; Savino Occhionorelli; Gabriele Anania; Federico Messina; Damiano de Tullio; Gloria Ferrocci; Federico Zanzi; Davide Pellegrini; Rocco Stano; Giorgio Cavallesco

    2007-01-01

    Cutaneous melanoma is one of the most studied neoplastic lesions in biology and clinical oncology. It has been well documented that this type of neoplasm presents a high metastatic rate, and is able to involve nearly every tissue. Non-cutaneous melanoma represents an unusual pattern of melanoma, and the small intestine is an uncommon anatomic localization. Herein we report an extremely rare clinical case of a young woman affected by a bleeding jejunal melanoma, whose early clinical presentation was an intestinal invagination.

  8. Addison's disease as a presentation of metastatic malignant melanoma.

    Science.gov (United States)

    Srinivasan, B; Patel, M; Ethunandan, M; Ilankovan, V

    2016-01-01

    Melanoma accounts for 5% of all skin cancers. The risk of metastasis is related to the thickness of the tumour, and can affect local, regional and distant sites. Adrenal metastasis from melanoma of the head and neck is uncommon and often asymptomatic. Addison's disease as a presentation of metastatic melanoma is extremely rare and we are unaware of previous reports in the world literature. We report a case of a patient with metastatic melanoma presenting with signs and symptoms of Addison's disease.

  9. Metastatic Malignant Melanoma Presenting as an Appendiceal Mucocele

    Directory of Open Access Journals (Sweden)

    A. A. Alduaij

    2011-01-01

    Full Text Available Melanoma metastatic to the appendix is extremely rare. Here we describe a case of a 31-year-old female from Bolivia with a remote history of metastatic malignant melanoma first diagnosed as a cutaneous malignant melanoma ten years prior to this presentation. The patient was being followed for a mucocele which on resection was found to be metastatic melanoma. “Mucocele” is a generic diagnosis that warrants further characterization and treatment.

  10. Hormonal exposures and the risk of uveal melanoma

    DEFF Research Database (Denmark)

    Behrens, Thomas Flensted; Kaerlev, Linda; Cree, Ian

    2010-01-01

    Several studies suggest that hormonal mechanisms may be associated with the development of uveal melanoma. Therefore, the association between the risk of uveal melanoma and exposure to hormonal exposures was investigated in a case-control study from nine European countries.......Several studies suggest that hormonal mechanisms may be associated with the development of uveal melanoma. Therefore, the association between the risk of uveal melanoma and exposure to hormonal exposures was investigated in a case-control study from nine European countries....

  11. MUCOSAL MALIGNANT MELANOMA OF NASOPHARYNX: A CASE REPORT

    Directory of Open Access Journals (Sweden)

    Chandrasekhar

    2015-06-01

    Full Text Available Primary mucosal malignant melanomas of sinonasal tract are uncommon tumors comprising 0.3-2% of all malignant melanomas and 4% of all head and Neck melanomas. We are reporting a rare case of mucosal malignant melanoma in a 45 year old female arising from nasopharynx which was excised completely by trans palatal approach followed by irradiation. This case is being reported because of its isolated involvement of nasopharynx, and early age of presentation.

  12. Dermoscopy of Scalp Melanoma: Report of Three Cases

    Directory of Open Access Journals (Sweden)

    Antonella Tosti

    2010-08-01

    Full Text Available Scalp melanoma is rare and often late-discovered because of its unusual position. As a consequence, its prognosis is poorer than melanoma on other body sites and only few clinical reports about its dermoscopic pattern have been published. In this paper, we report three clinical cases of scalp melanoma with photographic documentation and dermoscopic images, in order to improve the early detection of scalp melanoma.

  13. Flavour release of aldehydes and diacetyl in oil/water systems

    DEFF Research Database (Denmark)

    Haahr, Anne-Mette; Bredie, W. L. P.; Stahnke, Louise Heller

    2000-01-01

    The concentration- and time-dependent release of three C-6-aldehydes, six C-9-aldehydes and diacetyl was studied in model systems. The systems were water, rapeseed oil and oil-in-water emulsions. Dynamic headspace sampling was used to collect the volatile compounds. In the concentration......-dependent release experiment, the C-6-aldehydes were released in equal proportions from the aqueous and the emulsion systems, but in lower amounts from the pure oil. The amounts of C-9-aldehydes released decreased with increasing oil content. All aldehydes were released more rapidly from the aqueous system than...... from the pure oil. The release over time for diacetyl and (E,E)-2,4-hexadienal showed a linear relationship in all systems. The other compounds followed an exponential relationship between the time and the fraction released in the aqueous systems. It was demonstrated that the release of the volatile...

  14. Colorimetric monitoring of solid-phase aldehydes using 2,4-dinitrophenylhydrazine.

    Science.gov (United States)

    Shannon, Simon K; Barany, George

    2004-01-01

    A simple and rapid method to achieve colorimetric monitoring of resin-bound aldehydes, based on ambient temperature reaction with 2,4-dinitrophenylhydrazine (DNPH) in the presence of dilute acid, has been developed as an adjunct to solid-phase organic synthesis and combinatorial chemistry. By this test, the presence of aldehydes is indicated by a red to dark-orange appearance, within a minute. Alternatively, resins that are free of aldehydes or in which aldehyde functions have reacted completely retain their original color. The DNPH test was demonstrated for poly(ethylene glycol)-polystyrene (PEG-PS), aminomethyl polystyrene (AMP), cross-linked ethoxylate acrylate resin (CLEAR), and acryloylated O,O'-bis(2-aminopropyl)poly(ethylene glycol) (PEGA) supports and gave results visible to the naked eye at levels as low as 18 micromol of aldehyde per gram of resin.

  15. Multiple primary melanoma in a Thai male: a case report.

    Science.gov (United States)

    Payapvipapong, Kittisak; Kanechorn-Na-Ayuthaya, Pinyapat

    2014-02-01

    Melanoma is a malignant tumor of melanocytes and the most threatening skin cancer documenting one of the highest in mortality rates in comparison to other non-skin cancers due to its potential to metastasize. Although the global incidence of melanoma has increased, the melanoma-related deaths decreased owing to the fact that melanoma is curable under the condition that early diagnosis is made and treatment is undertaken as soon as possible. Patients with primary melanoma developing a second primary melanoma are less common compared to the generalpopulation developing the first. Not only is melanoma less commonly found in Thaipatients but multiple primary melanomas (MPM) are rarely reported. The present report of a 48-year-old Thai male who presented with asymptomatic black patch on the right big toe nail and an atypical mole on the back, both ofwhich were histologically confirmed melanomas. Treatment included amputation of the right big toe and wide excision of melanoma on the back, which cleared the malignancy without recurrence until present. Although MPM are rare in Thais, the authors should be alert in cases displaying multiple moles for the possibility of melanomas. The total body examination, early diagnosis and regular follow-up are important to decrease the mortality rate in melanoma patient.

  16. Cytotoxic T lymphocyte responses against melanocytes and melanoma

    Directory of Open Access Journals (Sweden)

    Schwartz Erich J

    2011-07-01

    Full Text Available Abstract Background Vitiligo is a common toxicity associated with immunotherapy for melanoma. Cytotoxic T lymphocytes (CTLs against melanoma commonly target melanoma-associated antigens (MAAs which are also expressed by melanocytes. To uncouple vitiligo from melanoma destruction, it is important to understand if CTLs can respond against melanoma and melanocytes at different levels. Methods To understand the dichotomous role of MAA-specific CTL, we characterized the functional reactivities of established CTL clones directed to MAAs against melanoma and melanocyte cell lines. Results CTL clones generated from melanoma patients were capable of eliciting MHC-restricted, MAA-specific lysis against melanocyte cell lines as well as melanoma cells. Among the tested HLA-A*0201-restricted CTL clones, melanocytes evoked equal to slightly higher degranulation and cytolytic responses as compared to melanoma cells. Moreover, MAA-specific T cells from vaccinated patients responded directly ex vivo to melanoma and melanocytes. Melanoma cells express slightly higher levels of MART-1 and gp100 than melanocytes as measured by quantitative reverse-transcriptase polymerase chain reaction (qRT-PCR and immunohistochemistry. Conclusions Our data suggest that CTLs respond to melanoma and melanocytes equally in vitro and directly ex vivo.

  17. Evaluation of tumor-specific promoter activities in melanoma

    NARCIS (Netherlands)

    Lu, B; Makhija, SK; Nettelbeck, DM; Rivera, AA; Komarova, S; Zhou, F; Yamamoto, M; Haisma, HJ; Alvarez, RD; Curiel, DT; Zhu, ZB

    Gene therapy is a novel therapy for melanoma. To date, however, there is still no powerful tumor specific promoter (TSP) to restrict the transgene expression in melanoma cells. In order to define a useful TSP for targeting in the context of melanoma gene therapy, four promoters, the cyclooxygenase-2

  18. Oral Malignant Melanoma in a Ferret ( Mustela putorius furo).

    Science.gov (United States)

    d'Ovidio, Dario; Rossi, Giacomo; Meomartino, Leonardo

    2016-06-01

    Oral malignant melanomas are one of the most common oral malignant neoplasms in dogs but are rare in other domesticated species. This case report describes the clinical manifestations and histological appearance of oral melanoma in a ferret ( Mustela putorius furo). To the authors' knowledge, this is the first published description of a clinical case and histopathological findings of oral melanoma in this species.

  19. Immunotherapy of metastatic melanoma by reversal of immune suppression

    Energy Technology Data Exchange (ETDEWEB)

    Biggs, M.W.; Eiselein, J.E.

    1997-01-01

    Beginning with the observation that the human enteorvirus, Poliovirus Sabin 1, will lyse human melanoma cells in culture, clinical trials involving two patients with advance melanoma were performed. Parenteral injection of the viable Poliovirus into cutaneous melanoma metastases followed in 24 hours by oral administration of cyclophosphamide. The results of these two trials are described.

  20. Vemurafenib for the treatment of melanoma.

    LENUS (Irish Health Repository)

    Jordan, Emmet John

    2012-12-01

    Metastatic melanoma is an aggressive disease resistant to chemotherapy. Recent clinical trials have reported improved survival for two novel agents; ipilimumab, a humanized, IgG1 monoclonal antibody that blocks cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) and vemurafenib , a BRAF (v-raf murine sarcoma viral oncogene homolog B1) inhibitor targeting an activating mutation in the serine-threonine-protein kinase BRAF gene. AREAS COVERED: The authors reviewed preclinical and clinical data examining the safety of vemurafenib in melanoma. MEDLINE and EMBASE were searched using the medical subject heading \\'vemurafenib\\' and the following text terms: melanoma, BRAF inhibition, vemurafenib. This review provides the reader with an overview of current data examining the efficacy and safety of vemurafenib in metastatic melanoma. EXPERT OPINION: Vemurafenib is an oral agent licensed for patients with BRAF V600E mutation-positive inoperable and metastatic melanoma. The most common adverse effects observed in Phase III clinical trials were dermatological events, arthralgia and fatigue. Specific dermatological toxicities included development of cutaneous squamous cell cancers and keratoacanthomas. Prolongation of the QT interval was also reported. Regular dermatological assessments and electrocardiograms are recommended. Ongoing trials are examining vemurafenib in both the adjuvant setting and metastatic setting in combination with ipilimumab and MEK inhibitors (mitogen-activated protein kinase\\/extracellular signal-regulated kinase). Understanding and overcoming mechanisms of resistance to BRAF inhibitors is the focus of ongoing research.

  1. Ras, Raf, and MAP kinase in melanoma.

    Science.gov (United States)

    Solus, Jason F; Kraft, Stefan

    2013-07-01

    A growing understanding of the biology and molecular mechanisms of melanoma has led to the identification of a number of driver mutations for this aggressive tumor. The most common mutations affect signaling of the Ras/Raf/MAPK (mitogen-activated protein kinase) pathway. This review will focus on mutations in genes encoding proteins that play a role in the MAPK pathway and that have been implicated in melanoma biology, such as BRAF, NRAS, and MEK (MAPK kinase), and detail the current understanding of their role in melanoma progression from a molecular biology perspective. Furthermore, this review will also consider some additional mutations in genes such as KIT, GNAQ, and GNA11, which can be seen in certain subtypes of melanoma and whose gene products interact with the MAPK pathway. In addition, the association of these molecular changes with clinical and classical histopathologic characteristics of melanoma will be outlined and their role in diagnosis of melanocytic lesions discussed. Finally, a basic overview of the current targeted therapy landscape, as far as relevant to the pathologist, will be provided.

  2. (Neo)adjuvant systemic therapy for melanoma.

    Science.gov (United States)

    van Zeijl, M C T; van den Eertwegh, A J; Haanen, J B; Wouters, M W J M

    2017-03-01

    Surgery still is the cornerstone of treatment for patients with stage II and III melanoma, but despite great efforts to gain or preserve locoregional control with excision of the primary tumour, satellites, intransits, sentinel node biopsy and lymphadenectomy, surgery alone does not seem to improve survival any further. Prognosis for patients with high risk melanoma remains poor with 5-year survival rates of 40 to 80%. Only interferon-2b has been approved as adjuvant therapy since 1995, but clinical integration is low considering the high risk-benefit ratio. In recent years systemic targeted- and immunotherapy have proven to be beneficial in advanced melanoma and could be a promising strategy for (neo)adjuvant treatment of patients with resectable high risk melanomas as well. Randomised, placebo- controlled phase III trials on adjuvant systemic targeted- and immunotherapy are currently being performed using new agents like ipilimumab, pembrolizumab, nivolumab, vemurafenib and dabrafenib plus trametinib. In this article we review the literature on currently known adjuvant therapies and currently ongoing trials of (neo)adjuvant therapies in high risk melanomas.

  3. [Molecular and immunohistochemical diagnostics in melanoma].

    Science.gov (United States)

    Schilling, B; Griewank, K G

    2016-07-01

    To provide appropriate therapy and follow-up to patients with malignant melanoma, proper diagnostics are of critical importance. Targeted therapy of advanced melanoma is based on the molecular genetic analyses of tumor tissue. In addition, sequencing of genes and other genetic approaches can provide insight into the origin of melanocytic tumors and can aid in distinguishing benign from malignant lesions. In this regard, spizoid neoplasms remain a challenging entity. Aside from genetic analyses of tumor tissue, immunohistochemistry remains an essential tool in melanoma diagnostics and TNM classification. With new immunotherapies being approved for advanced melanoma, immunohistochemistry to determine PD-L1 expression has gained clinical interest. While PD-L1 expression is associated with response to PD-1 blockade, a substantial number of patients without PD-L1 expression can still experience tumor remission upon treatment. In this review, current and future developments in melanoma diagnostics with regard to molecular genetics and immunohistochemistry are summarized. The utilization of such analyses in clinical decision making is also discussed.

  4. Autophagy- An emerging target for melanoma therapy

    Science.gov (United States)

    Ndoye, Abibatou; Weeraratna, Ashani T.

    2016-01-01

    Melanoma accounts for only 5% of all cancers but is the leading cause of skin cancer death due to its high metastatic potential. Patients with metastatic melanoma have a 10-year survival rate of less than 10%. While the clinical landscape for melanoma is evolving rapidly, lack of response to therapies, as well as resistance to therapy remain critical obstacles for treatment of this disease. In recent years, a myriad of therapy resistance mechanisms have been unravelled, one of which is autophagy, the focus of this review. In advanced stages of malignancy, melanoma cells hijack the autophagy machinery in order to alleviate drug-induced and metabolic stress in the tumor microenvironment, thereby promoting resistance to multiple therapies, tumor cell survival, and progression.  Autophagy is an essential cellular process that maintains cellular homeostasis through the recycling of intracellular constituents. Early studies on the role of autophagy in cancer generated controversy as to whether autophagy was pro- or anti-tumorigenic. Currently, there is a consensus that autophagy is tumor-suppressive in the early stages of cancer and tumor-promoting in established tumors.  This review aims to highlight current understandings on the role of autophagy in melanoma malignancy, and specifically therapy resistance; as well as to evaluate recent strategies for therapeutic autophagy modulation. PMID:27583134

  5. Selenium for the Prevention of Cutaneous Melanoma

    Directory of Open Access Journals (Sweden)

    Douglas Grossman

    2013-03-01

    Full Text Available The role of selenium (Se supplementation in cancer prevention is controversial; effects often depend on the nutritional status of the subject and on the chemical form in which Se is provided. We used a combination of in vitro and in vivo models to study two unique therapeutic windows for intervention in the process of cutaneous melanomagenisis, and to examine the utility of two different chemical forms of Se for prevention and treatment of melanoma. We studied the effects of Se in vitro on UV-induced oxidative stress in melanocytes, and on apoptosis and cell cycle progression in melanoma cells. In vivo, we used the HGF transgenic mouse model of UV-induced melanoma to demonstrate that topical treatment with l-selenomethionine results in a significant delay in the time required for UV-induced melanoma development, but also increases the rate of growth of those tumors once they appear. In a second mouse model, we found that oral administration of high dose methylseleninic acid significantly decreases the size of human melanoma xenografts. Our findings suggest that modestly elevation of selenium levels in the skin might risk acceleration of growth of incipient tumors. Additionally, certain Se compounds administered at very high doses could have utility for the treatment of fully-malignant tumors or prevention of recurrence.

  6. Melanocyte and Melanoma Cell Activation by Calprotectin

    Directory of Open Access Journals (Sweden)

    Stephanie H. Shirley

    2014-01-01

    Full Text Available Calprotectin, a heterodimer of S100A8 and S100A9, is a proinflammatory cytokine released from ultraviolet radiation-exposed keratinocytes. Calprotectin binds to Toll-like receptor 4, the receptor for advanced glycation end-products, and extracellular matrix metalloproteinase inducer on target cells to stimulate migration. Melanocytes and melanoma cells produce little if any calprotectin, but they do express receptors for the cytokine. Thus, keratinocyte-derived calprotectin has the potential to activate melanocytes and melanoma cells within the epidermis in a paracrine manner. We examined the ability of calprotectin to stimulate proliferation and migration in normal human melanocytes and melanoma cells in vitro. We first showed, by immunofluorescence and quantitative RT-PCR, that the melanocytic cells employed expressed a calprotectin receptor, the receptor for advanced end-products. We then demonstrated that calprotectin significantly enhanced proliferation, migration, and Matrigel invasion in both normal human melanocytes and melanoma cells. Thus, calprotectin is one of the numerous paracrine factors released by ultraviolet radiation-exposed keratinocytes that may promote melanomagenesis and is a potential target for melanoma prevention or therapy.

  7. Trametinib in the treatment of melanoma.

    Science.gov (United States)

    Thota, Ramya; Johnson, Douglas B; Sosman, Jeffrey A

    2015-05-01

    Aberrant MAPK pathway signaling is a hallmark of melanoma. Mitogen/extracellular signal-regulated kinase (MEK) 1/2 are integral components of MAPK signaling. Several MEK inhibitors have demonstrated activity as single agents and in combination with other therapies. Trametinib was the first MEK inhibitor approved for use in treatment of advanced BRAF(V600) mutant melanoma as a single agent and in combination with BRAF inhibitor, dabrafenib. In this article, we discuss the underlying biology of MEK inhibition and its rationale in melanoma treatment with special emphasis on the clinical development of trametinib, from initial Phase I studies to randomized Phase II and III studies, both as monotherapy and in combination with other therapeutics. Furthermore, we briefly comment on trametinib for NRAS mutant and other non-BRAF mutant subsets of melanoma. Trametinib is a novel oral MEK inhibitor with clinical activity in BRAF(V600) mutant metastatic melanoma alone and in combination with dabrafenib. Trametinib is currently being explored in other genetic subsets as well, particularly those with NRAS mutations or atypical BRAF alterations. Furthermore, to maximize efficacy and overcome acquired resistance, studies evaluating the combination of trametinib with other targeted agents and immunotherapy are underway.

  8. Brachytherapy in the Management of Uveal Melanomas

    Directory of Open Access Journals (Sweden)

    Samuray Tuncer

    2014-09-01

    Full Text Available Uveal melanoma is the most common intraocular tumor in adults. Clinical studies have shown similar patient survival rates after treatment of medium-sized melanomas when comparing plaque brachytherapy with radioactive iodine-125 versus enucleation. This finding further emphasizes the importance of this globe-sparing treatment. Brachytherapy is a special local radiotherapy technique that aims to deliver high-dose radiation directly to the tumor by sparing the periocular structures. Brachytherapy is still the most widely used treatment for uveal melanoma. Iodine-125 and ruthenium-106 are the most common radioisotopes used in brachytherapy. After brachytherapy, sight-threatening complications occur unavoidably in many patients. Brachytherapy is mostly associated with long-term complications. Radiation retinopathy and cataract formation are the most common treatment-related complications. Brachytherapy provides local tumor control (ocular salvage in about 90% of patients. Adjunctive transpupillary thermotherapy (sandwich therapy improves the control rate of local tumors to 97%. About 10% of patients treated with brachytherapy subsequently require enucleation because of local tumor recurrence or neovascular glaucoma at 5 years of follow-up. Metastatic disease occurs in 10% of patients with medium-sized melanoma at 5-year follow-up. This rate increases to 55% at 10-year follow-up in patients with large melanomas (thickness >8 mm. Thus, it is very important to inform the patients under the light of these data prior to brachytherapy. (Turk J Ophthalmol 2014; 44: Supplement 43-8

  9. Antioxidants can increase melanoma metastasis in mice.

    Science.gov (United States)

    Le Gal, Kristell; Ibrahim, Mohamed X; Wiel, Clotilde; Sayin, Volkan I; Akula, Murali K; Karlsson, Christin; Dalin, Martin G; Akyürek, Levent M; Lindahl, Per; Nilsson, Jonas; Bergo, Martin O

    2015-10-07

    Antioxidants in the diet and supplements are widely used to protect against cancer, but clinical trials with antioxidants do not support this concept. Some trials show that antioxidants actually increase cancer risk and a study in mice showed that antioxidants accelerate the progression of primary lung tumors. However, little is known about the impact of antioxidant supplementation on the progression of other types of cancer, including malignant melanoma. We show that administration of N-acetylcysteine (NAC) increases lymph node metastases in an endogenous mouse model of malignant melanoma but has no impact on the number and size of primary tumors. Similarly, NAC and the soluble vitamin E analog Trolox markedly increased the migration and invasive properties of human malignant melanoma cells but did not affect their proliferation. Both antioxidants increased the ratio between reduced and oxidized glutathione in melanoma cells and in lymph node metastases, and the increased migration depended on new glutathione synthesis. Furthermore, both NAC and Trolox increased the activation of the small guanosine triphosphatase (GTPase) RHOA, and blocking downstream RHOA signaling abolished antioxidant-induced migration. These results demonstrate that antioxidants and the glutathione system play a previously unappreciated role in malignant melanoma progression. Copyright © 2015, American Association for the Advancement of Science.

  10. Frequent MAGE mutations in human melanoma.

    Directory of Open Access Journals (Sweden)

    Otavia L Caballero

    Full Text Available BACKGROUND: Cancer/testis (CT genes are expressed only in the germ line and certain tumors and are most frequently located on the X-chromosome (the CT-X genes. Amongst the best studied CT-X genes are those encoding several MAGE protein families. The function of MAGE proteins is not well understood, but several have been shown to potentially influence the tumorigenic phenotype. METHODOLOGY/PRINCIPAL FINDINGS: We undertook a mutational analysis of coding regions of four CT-X MAGE genes, MAGEA1, MAGEA4, MAGEC1, MAGEC2 and the ubiquitously expressed MAGEE1 in human melanoma samples. We first examined cell lines established from tumors and matching blood samples from 27 melanoma patients. We found that melanoma cell lines from 37% of patients contained at least one mutated MAGE gene. The frequency of mutations in the coding regions of individual MAGE genes varied from 3.7% for MAGEA1 and MAGEA4 to 14.8% for MAGEC2. We also examined 111 fresh melanoma samples collected from 86 patients. In this case, samples from 32% of the patients exhibited mutations in one or more MAGE genes with the frequency of mutations in individual MAGE genes ranging from 6% in MAGEA1 to 16% in MAGEC1. SIGNIFICANCE: These results demonstrate for the first time that the MAGE gene family is frequently mutated in melanoma.

  11. Plasma 25-Hydroxyvitamin D and Risk of Non-Melanoma and Melanoma Skin Cancer

    DEFF Research Database (Denmark)

    Afzal, Shoaib; Nordestgaard, Børge G; Bojesen, Stig E

    2013-01-01

    Sun exposure is a major risk factor for skin cancer and is also an important source of vitamin D. We tested the hypothesis that elevated plasma 25-hydroxyvitamin D (25-OH-vitD) associates with increased risk of non-melanoma and melanoma skin cancer in the general population. We measured plasma 25......-OH-vitD in 10,060 white individuals from the Danish general population. During 28 years of follow-up, 590 individuals developed non-melanoma skin cancer and 78 developed melanoma skin cancer. Increasing 25-OH-vitD levels, by clinical categories or by seasonally adjusted tertiles, were associated...... with increasing cumulative incidence of non-melanoma skin cancer (trend P=2 × 10(-15) and P=3 × 10(-17)) and melanoma skin cancer (P=0.003 and P=0.001). Multivariable adjusted hazard ratios of non-melanoma skin cancer were 5.04 (95% confidence interval (CI): 2.78-9.16) for 25-OH-vitD 50 vs. 60 years, 25-OH...

  12. Monolayer structures of alkyl aldehydes: Odd-membered homologues

    Energy Technology Data Exchange (ETDEWEB)

    Phillips, T.K. [BP Institute, Department of Chemistry, University of Cambridge, Cambridge (United Kingdom); Clarke, S.M., E-mail: stuart@bpi.cam.ac.u [BP Institute, Department of Chemistry, University of Cambridge, Cambridge (United Kingdom); Bhinde, T. [BP Institute, Department of Chemistry, University of Cambridge, Cambridge (United Kingdom); Castro, M.A.; Millan, C. [Instituto Ciencia de los Materiales de Sevilla, Departamento de Quimica Inorganica (CSIC-Universidad de Sevilla) (Spain); Medina, S. [Centro de Investigacion, Tecnologia e Innovacion de la Universidad de Sevilla (CITIUS), Sevilla (Spain)

    2011-03-01

    Crystalline monolayers of three aldehydes with an odd number of carbon atoms in the alkyl chain (C{sub 7}, C{sub 9} and C{sub 11}) at low coverages are observed by a combination of X-ray and neutron diffraction. Analysis of the diffraction data is discussed and possible monolayer crystal structures are proposed; although unique structures could not be ascertained for all molecules. We conclude that the structures are flat on the surface, with the molecules lying in the plane of the layer. The C{sub 11} homologue is determined to have a plane group of either p2, pgb or pgg, and for the C{sub 7} homologue the p2 plane group is preferred.

  13. Rhenium-catalysed hydroboration of aldehydes and aldimines.

    Science.gov (United States)

    Arévalo, Rebeca; Vogels, Christopher M; MacNeil, Gregory A; Riera, Lucía; Pérez, Julio; Westcott, Stephen A

    2017-06-28

    The first examples for the rhenium-catalysed hydroboration of aldehydes, ketones and aldimines, including heteroaromatic quinoline, are reported herein. Reactions are remarkably chemoselective and tolerant of several functional groups. A wide array of rhenium complexes were efficient pre-catalysts for these hydroborations, including new low-valent complexes of the formula [Re(N-N)(CO)3(L)]X (N-N = bipy derivative, L = labile ligand/solvent, and X = [BAr(F)4](-) and [B(3,5-di-tBu-cat)2](-)), which have been characterized fully including an X-ray diffraction study for [Re(bipy)(CO)3(quin)][BAr(F)4] (2). A new silver spiroboronate ester Ag[B(3,5-di-tBu-cat)2](NCCH3)3 (3) was prepared and characterized fully, including an X-ray diffraction study, and used to make one of the new rhenium complexes.

  14. Reduction of Aldehydes and Ketones with Potassium Borohydride as Reductant

    Institute of Scientific and Technical Information of China (English)

    罗慧谋; 李毅群

    2005-01-01

    A series of aldehydes and ketones were reduced by potassium borohydride in an ionic liquid/water ([bmim]PF6/H2O) biphasic system to afford corresponding alcohol with high purity in excellent yields. The ionic liquid/water biphasic system could promote the chemoselectivity and the substituents such as nitro group and chlorine remained intact. Aromatic ketones were not as active as aromatic aldhydes and cyclic ketones owing to their higher steric hindrance. The ionic liquid could be recycled and reused. This protocol has notable advantages of no need of phase transfer catalyst and organic solvents, mild conditions, simple operation, short reaction time, ease work-up, high yields and recycling of the ionic liquid.

  15. Targeting aldehyde dehydrogenase: a potential approach for cell labeling

    Energy Technology Data Exchange (ETDEWEB)

    Vaidyanathan, Ganesan [Department of Radiology, Duke University Medical Center, Box 3808, Durham, NC 27710 (United States)], E-mail: ganesan.v@duke.edu; Song, Haijing; Affleck, Donna; McDougald, Darryl L. [Department of Radiology, Duke University Medical Center, Box 3808, Durham, NC 27710 (United States); Storms, Robert W. [Division of Cellular Therapy, Department of Medicine, Duke University Medical Center, Durham, NC 27710 (United States); Zalutsky, Michael R.; Chin, Bennett B. [Department of Radiology, Duke University Medical Center, Box 3808, Durham, NC 27710 (United States)

    2009-11-15

    Introduction: To advance the science and clinical application of stem cell therapy, the availability of a highly sensitive, quantitative and translational method for tracking stem cells would be invaluable. Because hematopoetic stem cells express high levels of the cytosolic enzyme aldehyde dehydrogenase-1A1 (ALDH1), we sought to develop an agent that is specific to ALDH1 and thus to cells expressing the enzyme. Such an agent might be also helpful in identifying tumors that are resistant to cyclophosphomide chemotherapy because ALDH1 is known to be responsible for this resistance. Methods: We developed schemes for the synthesis of two radioiodinated aldehdyes - N-formylmethyl-5-[*I]iodopyridine-3-carboxamide ([*I]FMIC) and 4-diethylamino-3-[*I]iodobenzaldehyde ([*I]DEIBA)-at no-carrier-added levels from their respective tin precursors. These agents were evaluated using pure ALDH1 and tumor cells that expressed the enzyme. Results: The average radiochemical yields for the synthesis of [{sup 125}I]FMIC and [{sup 125}I]DEIBA were 70{+-}5% and 47{+-}14%, respectively. ALDH1 converted both compounds to respective acids suggesting their suitability as ALDH1 imaging agents. Although ability of ALDH1 within the cells to oxidize one of these substrates was shown, specific uptake in ALDH-expressing tumor cells could not be demonstrated. Conclusion: To pursue this approach for ALDH1 imaging, radiolabeled aldehydes need to be designed such that, in addition to being good substrates for ALDH1, the cognate products should be sufficiently polar so as to be retained within the cells.

  16. Pharmacological activities of cilantro's aliphatic aldehydes against Leishmania donovani.

    Science.gov (United States)

    Donega, Mateus A; Mello, Simone C; Moraes, Rita M; Jain, Surendra K; Tekwani, Babu L; Cantrell, Charles L

    2014-12-01

    Leishmaniasis is a chronic infectious disease caused by different Leishmania species. Global occurrences of this disease are primarily limited to tropical and subtropical regions. Treatments are available; however, patients complain of side effects. Different species of plants have been screened as a potential source of new drugs against leishmaniasis. In this study, we investigated the antileishmanial activity of cilantro (Coriandrum sativum) essential oil and its main components: (E)-2-undecenal, (E)-2-decenal, (E)-2-dodecenal, decanal, dodecanal, and tetradecanal. The essential oil of C. sativum leaves inhibits growth of Leishmani donovani promastigotes in culture with an IC50 of 26.58 ± 6.11 µg/mL. The aliphatic aldehydes (E)-2-decenal (7.85 ± 0.28 µg/mL), (E)-2-undecenal (2.81 ± 0.21 µg/mL), and (E)-2-dodecenal (4.35 ± 0.15 µg/mL), all isolated from C. sativum essential oil, are effective inhibitors of in vitro cultures of L. donovani promastigotes. Aldehydes (E)-2-decenal, (E)-2-undecenal, and (E)-2-dodecenal were also evaluated against axenic amastigotes and IC50 values were determined to be 2.47 ± 0.25 µg/mL, 1.25 ± 0.11 µg/mL, and 4.78 ± 1.12 µg/mL, respectively. (E)-2-Undecenal and (E)-2-dodecenal demonstrated IC50 values of 5.65 ± 0.19 µg/mL and 9.60 ± 0.89 µg/mL, respectively, against macrophage amastigotes. These cilantro compounds showed no cytotoxicity against THP-1 macrophages.

  17. Differential effect of three polyunsaturated aldehydes on marine bacterial isolates.

    Science.gov (United States)

    Ribalet, Francois; Intertaglia, Laurent; Lebaron, Philippe; Casotti, Raffaella

    2008-01-31

    Bioactive polyunsaturated aldehydes (PUAs) are produced by several marine phytoplankton (mainly diatoms) and have been shown to have a detrimental effect on a wide variety of organisms, including phytoplankton and invertebrates. However, their potential impact on marine bacteria has been largely neglected. We assess here the effect of three PUAs produced by marine diatoms: 2E,4E-decadienal, 2E,4E-octadienal and 2E,4E-heptadienal, on the growth of 33 marine bacterial strains, including 16 strains isolated during a bloom of the PUA-producing diatom Skeletonema marinoi in the Northern Adriatic Sea. A concentration-dependent growth reduction was observed for 19 bacterial strains at concentrations ranging from 3 to 145 micromolL(-1). Surprisingly, Eudora adriatica strain MOLA358 (Flavobacteriaceae) and Alteromonas hispanica strain MOLA151 (Alteromonadaceae) showed growth stimulation upon exposure to PUAs at concentrations between 13 and 18 micromolL(-1). The remaining 12 strains were unaffected by even very high PUA concentrations. Strains isolated during the diatom bloom showed remarkable resistance to PUA exposures, with only two out of 16 strains showing growth inhibition at PUA concentrations below 106, 130, and 145 micromolL(-1) for 2E,4E-decadienal, 2E,4E-octadienal and 2E,4E-heptadienal, respectively. No correlation between taxonomical position and sensitivity to PUA was observed. Considering that many bacteria thrive in close vicinity of diatom cells, it is likely that these compounds may shape the structure of associated bacterial communities by representing a selection force. This is even more relevant during the final stages of blooms, when senescence and nutrient limitation increase the potential production and release of aldehydes.

  18. CDKN2A (INK4A-ARF) mutation analysis to distinguish cutaneous melanoma metastasis from a second primary melanoma.

    NARCIS (Netherlands)

    Blokx, W.A.M.; Lesterhuis, W.J.; Andriessen, M.P.M.; Verdijk, M.A.J.; Punt, C.J.A.; Ligtenberg, M.J.L.

    2007-01-01

    The histologic differential diagnosis between a second primary cutaneous melanoma and cutaneous melanoma metastasis in a patient with a previous history of melanoma can be very difficult. This case report describes the first application of CDKN2A mutation analysis for discriminating a cutaneous

  19. Report from the Melanoma Independent Board First Melanoma MIB Conference, 21-22 October 2013.

    Science.gov (United States)

    Testori, A; Ascierto, P; Chiarion Sileni, V; De Lorenzo, F; Pelicci, Pg; Rossi, Cr

    2014-01-01

    The Melanoma Independent Board (MIB) held its first conference from 21 to 22 October, 2013, in Rome, Italy. Like the MIB itself, the conference brought together specialists from all aspects of cancer care: doctors, patient associations, journalists, and representatives from local government, hospitals, and pharma to encourage an interdisciplinary discussion on the future of melanoma. It was hoped that the conference would be an opportunity for all participants to see and understand each other's points of view. In memoriam of melanoma pioneer Natalie Cascinelli, the conference focussed on innovation and sustainability as well as the latest drug developments.

  20. Melanoma metastasis to the spleen: Laparoscopic approach

    Directory of Open Access Journals (Sweden)

    Trindade Manoel Roberto

    2009-01-01

    Full Text Available We report a case of minimally invasive surgery in the management of metastasis to the spleen. A 67-year-old male patient with possible splenic soft tissue melanoma metastasis was referred to our hospital. He had a history of an excised soft tissue melanoma from his back eight months earlier, and the control abdominal computer tomography (CT scan revealed a hypodense spleen lesion. The patient underwent laparoscopic surgery to diagnose and treat the splenic lesion. The splenectomy was performed and the histological examination revealed a melanoma. The patient had a good postoperative course and was discharged on the second postoperative day. On his 12-month follow-up there was no sign of recurrence. The laparoscopic approach is a safe and effective alternative for treatment of splenic metastases.

  1. Melanoma metastasis to the spleen: Laparoscopic approach

    Science.gov (United States)

    Trindade, Manoel Roberto Maciel; Blaya, Rodrigo; Trindade, Eduardo Neubarth

    2009-01-01

    We report a case of minimally invasive surgery in the management of metastasis to the spleen. A 67-year-old male patient with possible splenic soft tissue melanoma metastasis was referred to our hospital. He had a history of an excised soft tissue melanoma from his back eight months earlier, and the control abdominal computer tomography (CT) scan revealed a hypodense spleen lesion. The patient underwent laparoscopic surgery to diagnose and treat the splenic lesion. The splenectomy was performed and the histological examination revealed a melanoma. The patient had a good postoperative course and was discharged on the second postoperative day. On his 12-month follow-up there was no sign of recurrence. The laparoscopic approach is a safe and effective alternative for treatment of splenic metastases. PMID:19547681

  2. Nodular Melanoma Mimicking Keratoacanthoma; Lessons to learn

    Directory of Open Access Journals (Sweden)

    Leelavathi Muthupalaniappen

    2012-07-01

    Full Text Available A 67-year-old man of Chinese descent presented with a painless nodular lesion that had been present on his right forearm for the previous 3 months. A single, well-defined, dome-shaped, firm nodule with a central keratin plug surrounded by erythema was noted. Keratoacanthoma with secondary bacterial infection was suspected and the patient underwent an excision biopsy. Biopsy of the nodule and immunohistochemical staining supported a diagnosis of nodular malignant melanoma. It should be noted both that nodular malignant melanoma may present with a wide variety of clinical appearances, and that the lack of melanin pigment in nodular malignant melanoma may hinder the diagnosis of this aggressive tumour.

  3. Bioelectric Applications for Treatment of Melanoma

    Directory of Open Access Journals (Sweden)

    Richard Heller

    2010-09-01

    Full Text Available Two new cancer therapies apply bioelectric principles. These methods target tumor structures locally and function by applying millisecond electric fields to deliver plasmid DNA encoding cytokines using electrogene transfer (EGT or by applying rapid rise-time nanosecond pulsed electric fields (nsPEFs. EGT has been used to locally deliver cytokines such as IL-12 to activate an immune response, resulting in bystander effects. NsPEFs locally induce apoptosis-like effects and affect vascular networks, both promoting tumor demise and restoration of normal vascular homeostasis. EGT with IL-12 is in melanoma clinical trials and nsPEFs are used in models with B16F10 melanoma in vitro and in mice. Applications of bioelectrics, using conventional electroporation and extensions of it, provide effective alternative therapies for melanoma.

  4. Bioelectric Applications for Treatment of Melanoma

    Energy Technology Data Exchange (ETDEWEB)

    Beebe, Stephen J., E-mail: sbeebe@odu.edu; Schoenbach, Karl H.; Heller, Richard [Frank Reidy Research Center for Bioelectrics/Old Dominion University 4211 Monarch Way, Suite 300, Norfolk, Virginia 23508 (United States)

    2010-09-27

    Two new cancer therapies apply bioelectric principles. These methods target tumor structures locally and function by applying millisecond electric fields to deliver plasmid DNA encoding cytokines using electrogene transfer (EGT) or by applying rapid rise-time nanosecond pulsed electric fields (nsPEFs). EGT has been used to locally deliver cytokines such as IL-12 to activate an immune response, resulting in bystander effects. NsPEFs locally induce apoptosis-like effects and affect vascular networks, both promoting tumor demise and restoration of normal vascular homeostasis. EGT with IL-12 is in melanoma clinical trials and nsPEFs are used in models with B16F10 melanoma in vitro and in mice. Applications of bioelectrics, using conventional electroporation and extensions of it, provide effective alternative therapies for melanoma.

  5. Pembrolizumab for the treatment of melanoma.

    Science.gov (United States)

    Kumar, Sanjeev Srinivas; McNeil, Catriona Mairi

    2015-01-01

    The immune system plays a vital role in regulating tumor growth, and the oncology community has witnessed an exciting resurgence in clinical research to develop effective immunotherapeutic strategies. The utility of these strategies in advanced melanoma has been at the forefront of these developments. In particular, blockade of programmed cell death protein 1 (PD-1) in advanced melanoma has proven to be a most promising new anticancer strategy. Pembrolizumab is a humanized IgG4 anti-PD-1 antibody that exerts its anti-tumor effect through blocking the interaction of the immune inhibitory molecule PD-1 with its ligands. Its effect has been most convincingly demonstrated in the setting of advanced melanoma, with growing evidence of clinical responses across a broad spectrum of other solid and hematological malignancies.

  6. Role of nuclear medicine in melanoma

    Energy Technology Data Exchange (ETDEWEB)

    Hoefnagel, C.A. [Department of Nuclear Medicine, The Netherlands Cancer Institute, Amsterdam (Netherlands)

    1998-11-01

    Melanoma is a malignant tumour of the melanocytes presenting characteristic metabolic and biological features, which remains a difficult and important issue in oncology. As a functional modality, nuclear medicine offers a variety of possibilities to assist in the clinical management of this disease. A brief survey of currently available techniques is presented for the diagnosis, staging and follow up, either by organ imaging or by using a great spectrum of tumour-seeking radiopharmaceuticals. The role of lymphoscintigraphy in melanoma is emphasized, as well as the supportive role of nuclear medicine in the surgical theater, enabling selective lymph node dissection by the sentinel node procedure and high dose regional chemotherapy by isolated limb perfusion. Although hardly used for metastatic melanoma so far, with all its tumour-seeking approaches nuclear medicine holds a therapeutic potential for this disease as well. (orig.) With 4 figs., 2 tabs., 47 refs.

  7. Orbital melanoma with calcification: A diagnostic dilemma

    Directory of Open Access Journals (Sweden)

    Sukhdeep Bains

    2016-01-01

    Full Text Available Primary orbital melanoma is rare and has varied initial presentation. A 28-year-old female presented with proptosis and decreased vision in the left eye. Computed tomography scan showed an orbital mass with contrast enhancement and calcification around the optic nerve leading to a diagnosis of meningioma. The patient chose to be on observation. Loss of vision with an increase in proptosis was seen at 6 months follow-up. On surgical exploration, a well-defined pigmented mass was seen encasing the optic nerve. Histopathological analysis revealed a malignant melanoma. Metastatic workup was negative. Left eye lid sparing exenteration was done. A high index of suspicion is necessary in a rapidly growing suspected optic nerve sheath meningioma and a differential diagnosis including orbital melanoma be considered.

  8. Focus on cutaneous and uveal melanoma specificities.

    Science.gov (United States)

    Pandiani, Charlotte; Béranger, Guillaume E; Leclerc, Justine; Ballotti, Robert; Bertolotto, Corine

    2017-04-15

    Cutaneous melanoma (CM) and uveal melanoma (UM) derive from cutaneous and uveal melanocytes that share the same embryonic origin and display the same cellular function. However, the etiopathogenesis and biological behaviors of these melanomas are very different. CM and UM display distinct landscapes of genetic alterations and show different metastatic routes and tropisms. Hence, therapeutic improvements achieved in the last few years for the treatment of CM have failed to ameliorate the clinical outcomes of patients with UM. The scope of this review is to discuss the differences in tumorigenic processes (etiologic factors and genetic alterations) and tumor biology (gene expression and signaling pathways) between CM and UM. We develop hypotheses to explain these differences, which might provide important clues for research avenues and the identification of actionable vulnerabilities suitable for the development of new therapeutic strategies for metastatic UM. © 2017 Pandiani et al.; Published by Cold Spring Harbor Laboratory Press.

  9. Melanoma in an Active Duty Marine.

    Science.gov (United States)

    Bartling, Samantha J; Rivard, Shayna C; Meyerle, Jon H

    2017-09-01

    Given that the majority of active duty service members are young and healthy, potentially malignant diagnoses such as skin cancer may be overlooked. Although melanoma accounts for only approximately 1% of skin cancers, it causes the greatest majority of skin cancer deaths. We present the case of a 27-year-old active duty Marine who presented with a hyperpigmented macule at his lateral neck that was a malignant melanoma in situ. This article reviews risk factors for the development of melanoma, offers guidelines for primary care providers, reviews resources for providers in a deployed or austere environment, offers recommendations for prevention and early diagnosis, and discusses follow up. Reprint & Copyright © 2017 Association of Military Surgeons of the U.S.

  10. Historical summary and recommendations on Melanoma in the LLNL workforce

    Energy Technology Data Exchange (ETDEWEB)

    Moore, D.H. II; Hatch, F.

    1994-12-01

    This document provides a historical summary and recommendations on melanoma in the Lawrence Livermore National Laboratory (LLNL) workforce. Melanoma of the skin comprises about 3.5% of the incidence (38,000 new cases in 1991) and 1.7% of the mortality (8500 deaths in 1991) of all cancer in the U.S. However, for several decades it has shown the fastest rate of increase of any cancer site. The following areas are discussed: background and recognition of increased melanoma at LLNL, history of melanoma studies at LLNL, results from occupational factors study, overall conclusion on increased melanoma incidence, and recommendations for future management.

  11. Current Research and Development of Chemotherapeutic Agents for Melanoma

    Directory of Open Access Journals (Sweden)

    Kyaw Minn Hsan

    2010-04-01

    Full Text Available Cutaneous malignant melanoma is the most lethal form of skin cancer and an increasingly common disease worldwide. It remains one of the most treatment-refractory malignancies. The current treatment options for patients with metastatic melanoma are limited and in most cases non-curative. This review focuses on conventional chemotherapeutic drugs for melanoma treatment, by a single or combinational agent approach, but also summarizes some potential novel phytoagents discovered from dietary vegetables or traditional herbal medicines as alternative options or future medicine for melanoma prevention. We explore the mode of actions of these natural phytoagents against metastatic melanoma.

  12. Genetic Testing in the Multidisciplinary Management of Melanoma.

    Science.gov (United States)

    Rashid, Omar M; Zager, Jonathan S

    2015-10-01

    Melanoma is increasing in incidence and represents an aggressive type of cancer. Efforts have focused on identifying genetic factors in melanoma carcinogenesis to guide prevention, screening, early detection, and targeted therapy. This article reviews the hereditary risk factors associated with melanoma and the known molecular pathways and genetic mutations associated with this disease. This article also explores the controversies associated with genetic testing and the latest advances in identifying genetic targets in melanoma, which offer promise for future application in the multidisciplinary management of melanoma.

  13. Braf V600E mutation in melanoma: translational current scenario.

    Science.gov (United States)

    Guadarrama-Orozco, J A; Ortega-Gómez, A; Ruiz-García, E B; Astudillo-de la Vega, H; Meneses-García, A; Lopez-Camarillo, C

    2016-09-01

    Melanoma was one of the translational cancer examples in clinic, including target therapy related to specific biomarkers impacting in the outcome of melanoma patients. Melanomagenesis involved a wide variety of mutations during his evolution; many of these mutated proteins have a kinase activity. One of the most cited proteins in melanoma is BRAF (about 50-60 % of melanomas harbors activating BRAF mutations), for these the most common is a substitution of valine to glutamic acid at codon 600 (p.V600E). Therefore, the precise identification of this underlying somatic mutation is essential; knowing the translational implications has opened a wide view of melanoma biology and therapy.

  14. Melanoma biomolecules: independently identified but functionally intertwined

    Directory of Open Access Journals (Sweden)

    Danielle Erin Dye

    2013-09-01

    Full Text Available The majority of patients diagnosed with melanoma present with thin lesions and generally these patients have a good prognosis. However, 5% of patients with early melanoma (< 1mm thick will have recurrence and die within 10 years, despite no evidence of local or metastatic spread at the time of diagnosis. Thus, there is a need for additional prognostic markers to help identify those patients that may be at risk of recurrent disease. Many studies and several meta-analyses have compared gene and protein expression in melanocytes, naevi, primary and metastatic melanoma in an attempt to find informative prognostic markers for these patients. However, although a large number of putative biomarkers have been described, few of these molecules are informative when used in isolation. The best approach is likely to involve a combination of molecules. We believe one approach could be to analyze the expression of a group of interacting proteins that regulate different aspects of the metastatic pathway. This is because a primary lesion expressing proteins involved in multiple stages of metastasis may be more likely to lead to secondary disease than one that does not. This review focuses on five putative biomarkers - melanoma cell adhesion molecule (MCAM, galectin-3 (gal-3, matrix metalloproteinase 2 (MMP-2, chondroitin sulfate proteoglycan 4 (CSPG4 and paired box 3 (PAX3. The goal is to provide context around what is known about the contribution of these biomarkers to melanoma biology and metastasis. Although each of these molecules have been independently identified as likely biomarkers, it is clear from our analyses that each are closely linked with each other, with intertwined roles in melanoma biology.

  15. Circulating tumor cells in melanoma patients.

    Directory of Open Access Journals (Sweden)

    Gary A Clawson

    Full Text Available Circulating tumor cells (CTCs are of recognized importance for diagnosis and prognosis of cancer patients. With melanoma, most studies do not show any clear relationship between CTC levels and stage of disease. Here, CTCs were enriched (∼400X from blood of melanoma patients using a simple centrifugation device (OncoQuick, and 4 melanocyte target RNAs (TYR, MLANA, MITF, and MIF were quantified using QPCR. Approximately one-third of melanoma patients had elevated MIF and MLANA transcripts (p<0.0001 and p<0.001, respectively compared with healthy controls. In contrast, healthy controls had uniformly higher levels of TYR and MITF than melanoma patients (p<0.0001. There was a marked shift of leukocytes into the CTC-enriched fractions (a 430% increase in RNA recovery, p<0.001, and no relationship between CTC levels and stage of disease was found. CTCs were captured on microfabricated filters and cultured. Captured melanoma CTCs were large cells, and consisted of 2 subpopulations, based on immunoreactivity. One subpopulation (∼50% stained for both pan-cytokeratin (KRT markers and the common leukocyte marker CD-45, whereas the second subpopulation stained for only KRT. Since similar cells are described in many cancers, we also examined blood from colorectal and pancreatic cancer patients. We observed analogous results, with most captured CTCs staining for both CD-45/KRT markers (and for the monocyte differentiation marker CD-14. Our results suggest that immature melanocyte-related cells (expressing TYR and MITF RNA may circulate in healthy controls, although they are not readily detectable without considerable enrichment. Further, as early-stage melanomas develop, immature melanocyte migration into the blood is somehow curtailed, whereas a significant proportion of patients develop elevated CTC levels (based on MIF and MLANA RNAs. The nature of the captured CTCs is consistent with literature describing leukocyte/macrophage-tumor cell fusion hybrids

  16. Hearing Impairments

    Science.gov (United States)

    Cavender, Anna; Ladner, Richard E.

    For many people with hearing impairments, the degree of hearing loss is only a small aspect of their disability and does not necessarily determine the types of accessibility solutions or accommodations that may be required. For some people, the ability to adjust the audio volume may be sufficient. For others, translation to a signed language may be more appropriate. For still others, access to text alternatives may be the best solution. Because of these differences, it is important for researchers in Web accessibility to understand that people with hearing impairments may have very different cultural-linguistic traditions and personal backgrounds.

  17. [Diagnostic Approaches to Suspected Choroidal Melanoma].

    Science.gov (United States)

    Girbardt, C; Rehak, M; Wiedemann, P

    2017-03-10

    Whenever funduscopy reveals possible choroidal melanoma, all available information must be gathered to either confirm or exclude the diagnosis. Well-defined funduscopic criteria are available, which can already lead to a high degree of diagnostic certainty. Additional technical examinations can be used to exclude possible differential diagnoses. In cases where no clear diagnosis can be established, it is possible to take a biopsy or to watch and wait in order to observe possible growth. Whenever the diagnosis of a choroidal melanoma is established, cancer staging has to be performed in order to search for possible metastases.

  18. Metastatic melanoma and vemurafenib: novel approaches

    Directory of Open Access Journals (Sweden)

    Ramon Andrade De Mello

    2012-04-01

    Full Text Available Metastatic melanoma (MM presents a treatment challenge to oncologists worldwide. Dacarbazine is the first line chemotherapy treatment for MM, though the overall response rates are very poor. Recently, the v-raf murine sarcoma viral oncogene homolog B1 (BRAF V600 mutation was found to play a main role in MM. This mutation is present in 40-60% of melanoma patients. Vemurafenib is a BRAF kinase inhibitor that showed impressive results in phase I-III trials and was thus recently approved for the treatment of MM. This paper will briefly focus on vemurafenib in the treatment of MM and highlight concerns.

  19. Anorectal melanoma: report of two cases.

    Science.gov (United States)

    Remigio, P A; Der, B K; Forsberg, R T

    1976-01-01

    We have described the clinicopathologic findings in two cases of anorectal melanoma, and extracted the salient features from the medical literature. The disease is rare. Melanoma arises from the anal squamous membrane and very often spreads upward through submucosal planes, producing secondary satelites in the rectum. Trauma from defecation, vast lymphatic and venous systems in the anorectal region, and high invasiveness of the tumor cells eviden;ly account for early distant metastases. Histologically, the neoplastic cells often mimic other cancers. Treatment is surgical, with dismal end results.

  20. Sarcoidosis in Melanoma Patients: Case Report and Literature Review

    Energy Technology Data Exchange (ETDEWEB)

    Beutler, Bryce D., E-mail: brycebeutler@hotmail.com [School of Allied Health Sciences, University of Nevada, Las Vegas, 1060 Wiegand Road, Encinitas, CA 92024 (United States); Cohen, Philip R., E-mail: brycebeutler@hotmail.com [Department of Dermatology, University of California San Diego, 10991 Twinleaf Court, San Diego, CA 92131 (United States)

    2015-06-15

    Sarcoidosis is a systemic inflammatory disease characterized by the development of noncaseating granulomas in multiple organ systems. Many hematologic malignancies and solid tumors, including melanoma, have been associated with sarcoidosis. We describe the clinical and pathologic findings of a 54-year-old man with melanoma-associated sarcoidosis. In addition, we not only review the literature describing characteristics of other melanoma patients with sarcoidosis, but also the features of melanoma patients with antineoplastic therapy-associated sarcoidosis. Sarcoidosis has been described in 80 melanoma patients; sufficient information for analysis was provided in 39 of these individuals. In 43.6% of individuals (17 out of 39), sarcoidosis was directly associated with melanoma; in 56.4% of oncologic patients (22 out of 39), sarcoidosis was induced by antineoplastic therapy that had been administered for the treatment of their metastatic melanoma. The discovery of melanoma preceded the development of sarcoidosis in 12 of the 17 (70.5%) individuals who did not receive systemic treatment. Pulmonary and/or cutaneous manifestations of sarcoidosis were common among both groups of patients. Most patients did not require treatment for sarcoidosis. Melanoma patients—either following antineoplastic therapy or without systemic treatment—may be at an increased risk to develop sarcoidosis. In antineoplastic therapy naive melanoma patients, a common etiologic factor—such as exposure to ultraviolet light—may play a role in their developing melanoma and sarcoidosis.

  1. Sarcoidosis in Melanoma Patients: Case Report and Literature Review

    Science.gov (United States)

    Beutler, Bryce D.; Cohen, Philip R.

    2015-01-01

    Sarcoidosis is a systemic inflammatory disease characterized by the development of noncaseating granulomas in multiple organ systems. Many hematologic malignancies and solid tumors, including melanoma, have been associated with sarcoidosis. We describe the clinical and pathologic findings of a 54-year-old man with melanoma-associated sarcoidosis. In addition, we not only review the literature describing characteristics of other melanoma patients with sarcoidosis, but also the features of melanoma patients with antineoplastic therapy-associated sarcoidosis. Sarcoidosis has been described in 80 melanoma patients; sufficient information for analysis was provided in 39 of these individuals. In 43.6% of individuals (17 out of 39), sarcoidosis was directly associated with melanoma; in 56.4% of oncologic patients (22 out of 39), sarcoidosis was induced by antineoplastic therapy that had been administered for the treatment of their metastatic melanoma. The discovery of melanoma preceded the development of sarcoidosis in 12 of the 17 (70.5%) individuals who did not receive systemic treatment. Pulmonary and/or cutaneous manifestations of sarcoidosis were common among both groups of patients. Most patients did not require treatment for sarcoidosis. Melanoma patients—either following antineoplastic therapy or without systemic treatment—may be at an increased risk to develop sarcoidosis. In antineoplastic therapy naive melanoma patients, a common etiologic factor—such as exposure to ultraviolet light—may play a role in their developing melanoma and sarcoidosis. PMID:26083934

  2. All Vision Impairment

    Science.gov (United States)

    ... Home > Statistics and Data > All Vision Impairment All Vision Impairment Vision Impairment Defined Vision impairment is defined as the ... Ethnicity 2010 U.S. Age-Specific Prevalence Rates for Vision Impairment by Age and Race/Ethnicity Table for ...

  3. Epidermotropic metastatic melanoma with perilesional depigmentation in an Indian male

    Directory of Open Access Journals (Sweden)

    Bhavana Doshi

    2013-01-01

    Full Text Available Melanoma is a rare form of cutaneous malignancy encountered in the dark skin population. Epidermotropic metastatic melanoma is a rare form of cutaneous metastatic melanoma which can mimic primary melanoma on histopathology. Hence its differentiation is of immense prognostic importance. The occurrence of rim of depigmentation around the primary cutaneous melanoma has previously been reported to portend a bad prognosis. The occurrence of vitiligo like lesions in patients with metastatic melanoma in comparison has a better prognosis. However the occurrence of depigmentation around the secondaries is rare and its importance is not well known. Hence we wish to report a case of epidermotropic metastatic melanoma with perilesional depigmentation in a 78 year old Indian male.

  4. Isolation and Molecular Characterization of Circulating Melanoma Cells

    Directory of Open Access Journals (Sweden)

    Xi Luo

    2014-05-01

    Full Text Available Melanoma is an invasive malignancy with a high frequency of blood-borne metastases, but circulating tumor cells (CTCs have not been readily isolated. We adapted microfluidic CTC capture to a tamoxifen-driven B-RAF/PTEN mouse melanoma model. CTCs were detected in all tumor-bearing mice and rapidly declined after B-RAF inhibitor treatment. CTCs were shed early from localized tumors, and a short course of B-RAF inhibition following surgical resection was sufficient to dramatically suppress distant metastases. The large number of CTCs in melanoma-bearing mice enabled a comparison of RNA-sequencing profiles with matched primary tumors. A mouse melanoma CTC-derived signature correlated with invasiveness and cellular motility in human melanoma. CTCs were detected in smaller numbers in patients with metastatic melanoma and declined with successful B-RAF-targeted therapy. Together, the capture and molecular characterization of CTCs provide insight into the hematogenous spread of melanoma.

  5. Melanomas of unknown primary have a mutation profile consistent with cutaneous sun-exposed melanoma.

    Science.gov (United States)

    Dutton-Regester, Ken; Kakavand, Hojabr; Aoude, Lauren G; Stark, Mitchell S; Gartside, Michael G; Johansson, Peter; O'Connor, Linda; Lanagan, Cathy; Tembe, Varsha; Pupo, Gulietta M; Haydu, Lauren E; Schmidt, Christopher W; Mann, Graham J; Thompson, John F; Scolyer, Richard A; Hayward, Nicholas K

    2013-11-01

    Melanoma of unknown primary (MUP) is an uncommon phenomenon whereby patients present with metastatic disease without an evident primary site. To determine their likely site of origin, we combined exome sequencing from 33 MUPs to assess the total rate of somatic mutations and degree of UV mutagenesis. An independent cohort of 91 archival MUPs was also screened for 46 hot spot mutations highly prevalent in melanoma including BRAF, NRAS, KIT, GNAQ, and GNA11. Results showed that the majority of MUPs exhibited high somatic mutation rates, high ratios of C>T/G>A transitions, and a high rate of BRAF (45 of 101, 45%) and NRAS (32 of 101, 32%) mutations, collectively indicating a mutation profile consistent with cutaneous sun-exposed melanomas. These data suggest that a significant proportion of MUPs arise from regressed or unrecognized primary cutaneous melanomas or arise de novo in lymph nodes from nevus cells that have migrated from the skin.

  6. Tyrosinase expression in malignant melanoma, desmoplastic melanoma, and peripheral nerve tumors

    DEFF Research Database (Denmark)

    Boyle, Jenny L; Haupt, Helen M; Stern, Jere B

    2002-01-01

    . CONCLUSIONS: Our results support the sensitivity of tyrosinase expression and demonstrate the relative specificity of tyrosinase as a marker for melanocytic lesions, including desmoplastic melanoma, although pigmented peripheral nerve tumors may demonstrate focal positive staining. Immunoreactivity...

  7. Pathogenesis, diagnosis and management of primary melanoma of the colon

    Directory of Open Access Journals (Sweden)

    Imam Ayesha

    2011-02-01

    Full Text Available Abstract Background Melanomas within the alimentary tract are usually metastatic in origin. On the other hand, primary melanomas of the gastrointestinal tract are relatively uncommon. There are several published reports of melanomas occurring in the esophagus, stomach, small bowel, and anorectum. The occurrence of primary melanoma of the colon has, however, only been rarely reported. The optimum modus operandi for the management of primary colonic melanoma remains nebulous due to the limited number of reports in literature. Methods A comprehensive search of Medline, Cochrane and Highwire was performed using the following keywords: 'melanoma', 'malignant melanoma', 'primary melanoma', 'colon', 'gastrointestinal tract', 'alimentary tract', 'digestive tract', and 'large bowel'. All patients with primary melanoma localized to the colon were included in the review. Patients with metastatic melanomas to the gastrointestinal (GI tract and primary melanomas localized to the GI tract in anatomic locations other than colon were excluded. Results There have been only 12 reported cases of primary melanoma of the colon to date. The average age of patients on presentation was 60.4 years without any significant gender predilection. Right colon (33% and cecum (33% were the most common sites for the occurrence of primary colonic melanoma while abdominal pain (58% and weight loss (50% were the most common presenting complaints. Colonoscopy is the most reliable diagnostic investigation and offers the additional advantage of obtaining tissue for diagnosis. S-100 and HMB-45 are highly sensitive and specific for the diagnosis of this malignancy. For primary colonic melanomas that have not metastasized to any distant parts of the body, surgical resection with wide margins appears to be the treatment of choice. Although the management was individualized in every case, most of the authors preferred traditional hemicolectomy as the favored surgical approach

  8. Interpretation of Melanoma Risk Feedback in First-Degree Relatives of Melanoma Patients

    Directory of Open Access Journals (Sweden)

    Jennifer L. Hay

    2012-01-01

    Full Text Available Little is known about how individuals might interpret brief genetic risk feedback. We examined interpretation and behavioral intentions (sun protection, skin screening in melanoma first-degree relatives (FDRs after exposure to brief prototypic melanoma risk feedback. Using a 3 by 2 experimental pre-post design where feedback type (high-risk mutation, gene environment, and nongenetic and risk level (positive versus negative findings were systematically varied, 139 melanoma FDRs were randomized to receive one of the six scenarios. All scenarios included an explicit reminder that melanoma family history increased their risk regardless of their feedback. The findings indicate main effects by risk level but not feedback type; positive findings led to heightened anticipated melanoma risk perceptions and anticipated behavioral intentions. Yet those who received negative findings often discounted their family melanoma history. As such, 25%, 30%, and 32% of those who received negative mutation, gene-environment, and nongenetic feedback, respectively, reported that their risk was similar to the general population. Given the frequency with which those who pursue genetic testing may receive negative feedback, attention is needed to identify ideal strategies to present negative genetic findings in contexts such as direct to consumer channels where extensive genetic counseling is not required.

  9. Amuvatinib has cytotoxic effects against NRAS-mutant melanoma but not BRAF-mutant melanoma.

    Science.gov (United States)

    Fedorenko, Inna V; Fang, Bin; Koomen, John M; Gibney, Geoffrey T; Smalley, Keiran S M

    2014-10-01

    Effective targeted therapy strategies are still lacking for the 15-20% of melanoma patients whose melanomas are driven by oncogenic NRAS. Here, we report on the NRAS-specific behavior of amuvatinib, a kinase inhibitor with activity against c-KIT, Axl, PDGFRα, and Rad51. An analysis of BRAF-mutant and NRAS-mutant melanoma cell lines showed the NRAS-mutant cohort to be enriched for targets of amuvatinib, including Axl, c-KIT, and the Axl ligand Gas6. Increasing concentrations of amuvatinib selectively inhibited the growth of NRAS-mutant, but not BRAF-mutant melanoma cell lines, an effect associated with induction of S-phase and G2/M-phase cell cycle arrest and induction of apoptosis. Mechanistically, amuvatinib was noted to either inhibit Axl, AKT, and MAPK signaling or Axl and AKT signaling and to induce a DNA damage response. In three-dimensional cell culture experiments, amuvatinib was cytotoxic against NRAS-mutant melanoma cell lines. Thus, we show for the first time that amuvatinib has proapoptotic activity against melanoma cell lines, with selectivity observed for those harboring oncogenic NRAS.

  10. Aldehydes in hydrothermal solution - Standard partial molal thermodynamic properties and relative stabilities at high temperatures and pressures

    Science.gov (United States)

    Schulte, Mitchell D.; Shock, Everett L.

    1993-01-01

    Aldehydes are common in a variety of geologic environments and are derived from a number of sources, both natural and anthropogenic. Experimental data for aqueous aldehydes were taken from the literature and used, along with parameters for the revised Helgeson-Kirkham-Flowers (HKF) equations of state, to estimate standard partial molal thermodynamic data for aqueous straight-chain alkyl aldehydes at high temperatures and pressures. Examples of calculations involving aldehydes in geological environments are given, and the stability of aldehydes relative to carboxylic acids is evaluated. These calculations indicate that aldehydes may be intermediates in the formation of carboxylic acids from hydrocarbons in sedimentary basin brines and hydrothermal systems like they are in the atmosphere. The data and parameters summarized here allow evaluation of the role of aldehydes in the formation of prebiotic precursors, such as amino acids and hydroxy acids on the early Earth and in carbonaceous chondrite parent bodies.

  11. miR-579-3p controls melanoma progression and resistance to target therapy

    Science.gov (United States)

    Fattore, Luigi; Mancini, Rita; Acunzo, Mario; Romano, Giulia; Laganà, Alessandro; Pisanu, Maria Elena; Malpicci, Debora; Madonna, Gabriele; Mallardo, Domenico; Capone, Marilena; Fulciniti, Franco; Mazzucchelli, Luca; Botti, Gerardo; Croce, Carlo M.; Ascierto, Paolo Antonio; Ciliberto, Gennaro

    2016-01-01

    Therapy of melanoma patients harboring activating mutations in the BRAF (V-raf murine sarcoma viral oncogene homolog B1) oncogene with a combination of BRAF and MEK inhibitors is plagued by the development of drug resistance. Mutational events, as well as adaptive mechanisms, contribute to the development of drug resistance. In this context we uncover here the role of a miRNA, miR-579-3p. We first show that low expression of miR-579-3p is a negative prognostic factor correlating with poor survival. Expression levels of miR-579-3p decrease from nevi to stage III/IV melanoma samples and even further in cell lines resistant to BRAF/MEK inhibitors. Mechanistically, we demonstrate that miR-579-3p acts as an oncosuppressor by targeting the 3′UTR of two oncoproteins: BRAF and an E3 ubiquitin protein ligase, MDM2. Moreover miR-579-3p ectopic expression impairs the establishment of drug resistance in human melanoma cells. Finally, miR-579-3p is strongly down-regulated in matched tumor samples from patients before and after the development of resistance to targeted therapies. PMID:27503895

  12. Melanoma cutáneo asociado a nevo previo Cutaneous melanoma associated with previous nevus

    Directory of Open Access Journals (Sweden)

    María P. Gutiérrez

    2009-10-01

    Full Text Available El melanoma maligno es una neoplasia originada en los melanocitos de la piel y otras localizaciones. No existe información en nuestro país acerca de su incidencia y prevalecencia, sí se sabe cuáles son los factores de riesgo más importantes. El melanoma puede originarse de novo o a partir de lesiones melanocíticas previas. La noción de que un nevo melanocítico pueda servir como lesión precursora es sustentada por evidencias clínicas e histológicas. Realizamos en el Hospital Privado de Córdoba un estudio observacional, retrospectivo y analítico. El objetivo de este trabajo fue conocer cuál es la frecuencia de asociación de melanomas malignos que se desarrollan sobre nevos previos. Fueron analizados un total de 134 melanomas. En 32 pacientes (24%, los melanomas estuvieron histológicamente asociados con nevos, con espesores de Breslow mayores de 1 mm el porcentaje de asociación fue de 16.3%, y con Breslow menores de 1 mm, 38.1%. Al evaluar los melanomas en relación a la clasificación de Breslow y Clark, se objetivó que el grupo de melanomas asociados a nevos presentó un espesor de Breslow y niveles de Clark bajos y en el análisis estadístico fueron predictores significativos en la probabilidad de hallar esta asociación (p The malignant melanoma is a neoplasia originated from the melanocytes located in the skin and other locations. Even though there is not information regarding its incidence and prevalence in our country, its most important risk factors are known. The melanoma can originate de novo or from previous melanocytic lesions. The concept that a melanocytic nevus can serve as a precursor lesion is supported by clinical and histological evidence. An observational, retrospective and analytical study was carried out in the Hospital Privado de Córdoba. The objective was to determine which is the frequency of association of malignant melanomas that develop on previous nevus. A total of 134 melanomas were analyzed. In 32

  13. Immunotherapy of melanoma : toward clinical application

    NARCIS (Netherlands)

    Jorritsma-Smit, Annelies

    2008-01-01

    This thesis describes different immunotherapeutic strategies that can be used for the treatment of cancer in general, and of melanoma in particular. Tumor-specific T cell responses can be induced via either active or passive immunization. Active immunization can be used to target tumors for which hi

  14. Malignant melanoma revealed by testicular metastasi.

    Directory of Open Access Journals (Sweden)

    Marie Dusaud

    2015-01-01

    Due to rapid disease progression and high mortality rate within a short interval, a complete staging looking for other secondary locations must be done and a multidisciplinary care and palliative involvement must also be initiated in the context of metastatic melanoma.

  15. [Cutaneous malignant melanoma and the new drugs].

    Science.gov (United States)

    Nieweg, Omgo E; Gallegos-Hernández, José Francisco

    2015-01-01

    The treatment of cutaneous melanoma has historically been essentially surgical. Much progress has been made in this area, and the resection margins have been established based on tumour depth. Candidates are also identified for lymphadenectomy, avoiding the morbidity of the procedure in patients who do not require it. But little progress has been made in systemic treatment, since the 70's when the use of dacarbazine was introduced for the treatment of patients with tumour progression or distant metastasis, with disappointing results. Despite this, Dacarbazine has been the most used drug to the present. Three years ago, two new drugs were introduced, one of them based on the target therapy and other one in the immunotherapy, offering, with the obtained results, an alternative in the treatment of cutaneous melanoma The objectives of this article are to show the pathways of these drugs, to describe the current role of surgery in cutaneous melanoma, with the arrival of these drugs, as well as to know the therapeutic alternatives that are emerging for the cutaneous melanoma based on scientific evidence.

  16. Giant melanoma of the left thumb

    NARCIS (Netherlands)

    Zeebregts, CJAM; Schraffordt Koops, H.

    2000-01-01

    A 74-year-old female patient is described with a giant melanoma of the left thenar and concomitant bilateral pulmonary metastases. Palliative treatment consisted of a two-staged procedure in order to save the limb from amputation. Firstly, perfusion with gamma-interferon, tumour necrosis factor-alph

  17. Choroidal melanoma clinically simulating a retinal angioma

    Energy Technology Data Exchange (ETDEWEB)

    Shields, J.A.; Joffe, L.; Guibor, P.

    1978-01-01

    An amelanotic fundus lesion in a 35-year-old man was associated with a dilated retinal vessel, thus suggesting the diagnosis of retinal angioma. Fluorescein angiography and B-scan ultrasonography were not diagnostic, but a radioactive phosphorus uptake test suggested the lesion was malignant. The enucleated globe showed a malignant choroidal melanoma drained by a large retinal vein.

  18. Choroidal melanoma clinically simulating a retinal angioma.

    Science.gov (United States)

    Shields, J A; Joffe, L; Guibor, P

    1978-01-01

    An amelanotic fundus lesion in a 35-year-old man was associated with a dilated retinal vessel, thus suggesting the diagnosis of retinal angioma. Fluorescein angiography and B-scan ultrasonography were not diagnostic, but a radioactive phosphorus uptake test suggested the lesion was malignant. The enucleated globe showed a malignant choroidal melanoma drained by a large retinal vein.

  19. CURRENT CONCEPTS IN THERAPY OF UVEAL MELANOMA

    Directory of Open Access Journals (Sweden)

    Detanac Dženana A

    2015-07-01

    Full Text Available There has been significant progress made in the diagnosis and treatment of the primary uveal melanoma during the past decades and despite that, survival rate of uveal melanoma patients is still stable. Treatment options for uveal melanoma include phototherapy, brachytherapy, proton beam therapy, stereotactic radiotherapy, local resection, anti-angiogenic therapy, immunotherapy, and enucleation. Genetic analysis of tumors provides us with valuable prognostic information although effective therapies are lacking at this moment. It is not established yet whether prolonged survival is the result of treatment or whether it merely reflects earlier detection of metastases. Also, there are indications that survival after treatment of uveal melanoma probably does not depend on the method of treatment but rather on many clinical, histological and genetic risk factors. New studies are needed to provide a better understanding of of ocular treatment impact on survival in patients whose prognosis can be estimated according to the clinical stage, histological grade and genetic type. Therefore, the patients should be treated in experienced multi-disciplinary teams that must include these patients in clinical trial.

  20. Gender Differences in Melanoma Progression and Survival

    NARCIS (Netherlands)

    A. Joosse (Arjen)

    2014-01-01

    markdownabstract__Abstract__ Cutaneous melanoma is developing into a major public health problem worldwide. Incidence differs greatly across the world with high incidence rates in the Unites states, Europe and especially in Australia and New Zealand, but relatively low incidence rates in Central an

  1. VIRUS - LIKE NUCLEAR DEGENERATION IN MALIGNANT MELANOMA

    Directory of Open Access Journals (Sweden)

    Marcus A. Hairstone

    1968-01-01

    Full Text Available Nuclear inclusion bodies were observed in certain cell ,. .typs of a malignat melanoma. These inclusion b di ." tPCS of a malignat . . 0 JCS contained vlrusc.llkc particle ',200 to :-UJO millimi., ccyroclnes. III diameter, Variations in particle structure and con lent implied a maturation cycle

  2. Improving pharmacological targeting of AKT in melanoma.

    Science.gov (United States)

    Kuzu, Omer F; Gowda, Raghavendra; Sharma, Arati; Noory, Mohammad A; Dinavahi, Saketh S; Kardos, Gregory; Drabick, Joseph J; Robertson, Gavin P

    2017-09-28

    Targeting AKT with pharmacological agents inhibiting this protein in the melanoma clinic is ineffective. This is a major contradiction considering the substantial preclinical data suggesting AKT as an effective target. Various approaches have been undertaken to unravel this contradiction and drug combinations sought that could resolve this concern. We have shown that genetic targeting AKT3 or WEE1 can be effective for inhibiting tumor growth in preclinical animal models. However, no one has examined whether combining pharmacological agents targeting each of these enzymes could be more effective than inhibiting each alone and enhance the efficacy of targeting AKT in melanoma. This report shows that combining the AKT inhibitors (AZD5363 or MK1775) with the WEE1 inhibitor, AZD5363, can synergistically kill cultured melanoma cells and decrease melanoma tumor growth by greater than 90%. Co-targeting AKT and WEE1 led to enhanced deregulation of the cell cycle and DNA damage repair pathways by modulating the transcription factors p53 and FOXM1, as well as the proteins whose expression is regulated by these two proteins. Thus, this study identifies a unique combination of pharmacological agents and the ratio needed for efficacy that could be used to potentially improve the therapeutic effectiveness of targeting AKT in the clinic. Copyright © 2017 Elsevier B.V. All rights reserved.

  3. Clinical prognostic markers in stage IIIC melanoma.

    Science.gov (United States)

    Madu, Max F; Schopman, Jaap H H; Berger, Danique M S; Klop, Willem M C; Jóźwiak, Katarzyna; Wouters, Michel W J M; van der Hage, Jos A; van Akkooi, Alexander C J

    2017-08-01

    Although the EORTC 18071-trial has shown a clear survival benefit for adjuvant ipilimumab, accurately selecting patients for this toxic adjuvant therapy is important. We aimed to identify prognostic factors for death and disease recurrence in AJCC stage IIIC melanoma patients. Retrospective analysis of patients who underwent lymph node dissection (LND) for stage IIIC melanoma in our institution between 2000 and 2016. Baseline characteristics, melanoma-specific survival (MSS), and disease-free survival (DFS) were assessed, and prognostic factors for recurrence and survival were analyzed using uni- and multivariable analysis. A total of 205 patients were included. Median follow-up was 20 months (interquartile range 11-43 months), median MSS was 28 months, and median DFS was 11 months. Five-year MSS was 33% and 5-year DFS was 23%. N3 (≥4 involved lymph nodes) and extracapsular extension (ECE) carried an increased risk of disease recurrence after LND and death by melanoma. Patients with both N3 and ECE had virtually no long-term survival. Although survival for patients with stage IIIC is poor in general, patients with both N3 disease and ECE constitute the group with the worst prognosis and should be considered for adjuvant therapy with ipilimumab or any other future effective adjuvant therapy (study). © 2017 Wiley Periodicals, Inc.

  4. Dabrafenib Plus Trametinib for Advanced Melanoma

    Science.gov (United States)

    A summary of results from two phase III trials show that patients with metastatic melanoma whose tumors have specific mutations in the BRAF gene lived longer following treatment with dabrafenib (Tafinlar®), a BRAF inhibitor, plus trametinib (Mekinist®), a

  5. Testing Adjuvant Ipilimumab in Advanced Melanoma

    Science.gov (United States)

    In this clinical trial, patients with stage III or stage IV melanoma that has been completely resected will be randomly assigned to receive post-surgical treatment with either ipilimumab or high-dose interferon alfa-2b, the current standard of care.

  6. Isolated Pancreatic Metastasis from Malignant Melanoma: Is ...

    African Journals Online (AJOL)

    Journal of Surgical Technique and Case Report | Jul-Dec 2013 | Vol-5 | Issue-2. 82. Isolated ... malignant melanoma develop metastases. ... which proved to be effective for the management of some types of cancer ... she presented an epigastric pain and a 5 kg weight loss. An ... A new intervention was done at day 15 for.

  7. Cutaneous Complications of Targeted Melanoma Therapy.

    Science.gov (United States)

    de Golian, Emily; Kwong, Bernice Y; Swetter, Susan M; Pugliese, Silvina B

    2016-11-01

    The landscape of advanced and metastatic melanoma therapy has shifted dramatically in recent years. Since 2011, eight drugs (ipilimumab, vemurafenib, dabrafenib, trametinib, cometinib, pembrolizumab, nivolumab, and talimogene laherparepvec) have received FDA approval for the treatment of advanced or metastatic melanoma, including combination regimens of both small molecule kinase and immune checkpoint inhibitors. These therapies have revolutionized the management of unresectable regional nodal and distant melanoma, providing hope of extended survival to patients. As the use of novel agents has increased, so have the cutaneous toxicities associated with these medications. While most skin reactions are low-grade and can be managed conservatively with topical therapies, malignant lesions and more serious or life-threatening drug reactions can arise during therapy, requiring prompt dermatologic recognition and treatment in order to improve patient outcome. Given the survival benefit attributed to these new agents, treating skin toxicity and maintaining patient quality of life is of paramount importance. Oncologists should be aware of the common cutaneous toxicities associated with these medications and should be encouraged to involve dermatologists in the collaborative care of advanced melanoma patients. Close communication between oncologists and dermatologists can help to avoid unnecessary dose reduction or treatment discontinuation and identify situations when treatment cessation is truly warranted.

  8. Developments in targeted therapy in melanoma.

    Science.gov (United States)

    Amann, V C; Ramelyte, E; Thurneysen, S; Pitocco, R; Bentele-Jaberg, N; Goldinger, S M; Dummer, R; Mangana, J

    2017-03-01

    Melanomas are disease entities driven in part by the mitogen activated protein kinase (MAPK) pathway. The TCGA network recently defined four genetic subtypes based on the most prevalent significantly mutated genes, including mutant BRAF, mutant RAS (N/H/K), mutant NF1, and Triple wild-type melanoma (harboring none of the aforementioned mutations, but instead includes KIT, GNA and GNAQ mutations). The successful development of kinase inhibitors marked a milestone in the treatment of metastatic melanoma. Combination treatment with a BRAF- and MEK-inhibitor is the current standard of care for inoperable stage IIIC/IV BRAF-mutated melanoma. Recent data demonstrate excellent long-term outcome, especially in patients with normal baseline LDH levels, and confirm that there is a subset of BRAF inhibitor-naive patients who experience durable responses without progression on combination treatment. In the future, adding a third compound based on individual genetic alterations might further improve the outcome of targeted therapy. Copyright © 2016 Elsevier Ltd, BASO ~ The Association for Cancer Surgery, and the European Society of Surgical Oncology. All rights reserved.

  9. Metastatic malignant melanoma. Successfull treatment with ipilimumab

    NARCIS (Netherlands)

    Jansen, T.J.G.; Bruch-Gerharz, D.; Reifenberger, J.; Schulte, K.W.

    2013-01-01

    A 73-year-old man, in whom 26 years ago a malignant melanoma with cervical lymph node metastases of the right retroauricular region was diagnosed, developed BRAF V600E-negative distant metastases, which progressed during both monochemotherapy and polychemotherapy. Therefore he was started on

  10. The Treatment of Melanoma Brain Metastases.

    Science.gov (United States)

    Kibbi, Nour; Kluger, Harriet

    2016-12-01

    Melanoma is the malignancy with the highest rate of dissemination to the central nervous system once it metastasizes. Until recently, the prognosis of patients with melanoma brain metastases (MBM) was poor. In recent years, however, the prognosis has improved due to high-resolution imaging that facilitates early detection of small asymptomatic brain metastases and early intervention with local modalities such as stereotactic radiosurgery. More recently, a number of systemic therapies have been approved by the Food and Drug Administration for metastatic melanoma, resulting in improved survival for many MBM patients. Registration trials for these newer therapies excluded patients with untreated brain metastases, and a number of studies specifically tailored to this population of patients have been conducted or are underway. Herein, we review contemporary locoregional and systemic therapies and describe the unique challenges posed by treatment of brain metastases, such as radionecrosis, cerebral edema, and pseudoprogression. Since the number of systemic and combined modality clinical trials has increased, we expect that the treatment landscape for patients with melanoma brain metastasis will change dramatically. In addition to ongoing clinical trials, which show great promise, we conclude that our understanding of intracranial metastasis remains quite limited. In addition to inter-disciplinary, multi-modality studies, bench-side work to better understand the process of cerebrotropism is needed to fuel more drug development and further improve outcomes.

  11. The biology of melanoma prognostic factors.

    NARCIS (Netherlands)

    Spatz, A.; Stock, N.; Batist, G.; Kempen, L.C.L.T. van

    2010-01-01

    Cutaneous melanoma still represents a paradox among all solid tumors. It is the cancer for which the best prognostic markers ever identified in solid tumors are available, yet there is very little understanding of their biological significance. This review focuses on recent biological data that shed

  12. Molecular Bases of Cutaneous and Uveal Melanomas

    Directory of Open Access Journals (Sweden)

    Sudeep Gaudi

    2011-01-01

    Full Text Available Intensive research in recent years has begun to unlock the mysteries surrounding the molecular pathogenesis of melanoma, the deadliest of skin cancers. The high-penetrance, low-frequency susceptibility gene CDKN2A produces tumor suppressor proteins that function in concert with p53 and retinoblastoma protein to thwart melanomagenesis. Aberrant CDKN2A gene products have been implicated in a great many cases of familial cutaneous melanoma. Sporadic cases, on the other hand, often involve constitutive signal transduction along the mitogen-activated protein kinase (MAPK pathway, with particular focus falling upon mutated RAS and RAF protooncogenes. The proliferative effects of the MAPK pathway may be complemented by the antiapoptotic signals of the PI3K/AKT pathway. After skin, melanoma most commonly affects the eye. Data for the constitutive activation of the MAPK pathway in uveal melanoma exists as well, however, not through mutations of RAS and RAF. Rather, evidence implicates the proto-oncogene GNAQ. In the following discussion, we review the major molecular pathways implicated in both familial and sporadic cutaneous melanomagenesis, the former accounting for approximately 10% of cases. Additionally, we discuss the molecular pathways for which preliminary evidence suggests a role in uveal melanomagenesis.

  13. Comparative Metabolic Flux Profiling of Melanoma Cell Lines

    Science.gov (United States)

    Scott, David A.; Richardson, Adam D.; Filipp, Fabian V.; Knutzen, Christine A.; Chiang, Gary G.; Ronai, Ze'ev A.; Osterman, Andrei L.; Smith, Jeffrey W.

    2011-01-01

    Metabolic rewiring is an established hallmark of cancer, but the details of this rewiring at a systems level are not well characterized. Here we acquire this insight in a melanoma cell line panel by tracking metabolic flux using isotopically labeled nutrients. Metabolic profiling and flux balance analysis were used to compare normal melanocytes to melanoma cell lines in both normoxic and hypoxic conditions. All melanoma cells exhibited the Warburg phenomenon; they used more glucose and produced more lactate than melanocytes. Other changes were observed in melanoma cells that are not described by the Warburg phenomenon. Hypoxic conditions increased fermentation of glucose to lactate in both melanocytes and melanoma cells (the Pasteur effect). However, metabolism was not strictly glycolytic, as the tricarboxylic acid (TCA) cycle was functional in all melanoma lines, even under hypoxia. Furthermore, glutamine was also a key nutrient providing a substantial anaplerotic contribution to the TCA cycle. In the WM35 melanoma line glutamine was metabolized in the “reverse” (reductive) direction in the TCA cycle, particularly under hypoxia. This reverse flux allowed the melanoma cells to synthesize fatty acids from glutamine while glucose was primarily converted to lactate. Altogether, this study, which is the first comprehensive comparative analysis of metabolism in melanoma cells, provides a foundation for targeting metabolism for therapeutic benefit in melanoma. PMID:21998308

  14. Importance of glycolysis and oxidative phosphorylation in advanced melanoma

    Directory of Open Access Journals (Sweden)

    Ho Jonhan

    2012-10-01

    Full Text Available Abstract Serum lactate dehydrogenase (LDH is a prognostic factor for patients with stage IV melanoma. To gain insights into the biology underlying this prognostic factor, we analyzed total serum LDH, serum LDH isoenzymes, and serum lactate in up to 49 patients with metastatic melanoma. Our data demonstrate that high serum LDH is associated with a significant increase in LDH isoenzymes 3 and 4, and a decrease in LDH isoenzymes 1 and 2. Since LDH isoenzymes play a role in both glycolysis and oxidative phosphorylation (OXPHOS, we subsequently determined using tissue microarray (TMA analysis that the levels of proteins associated with mitochondrial function, lactate metabolism, and regulators of glycolysis were all elevated in advanced melanomas compared with nevic melanocytes. To investigate whether in advanced melanoma, the glycolysis and OXPHOS pathways might be linked, we determined expression of the monocarboxylate transporters (MCT 1 and 4. Analysis of a nevus-to-melanoma progression TMA revealed that MCT4, and to a lesser extend MCT1, were elevated with progression to advanced melanoma. Further analysis of human melanoma specimens using the Seahorse XF24 extracellular flux analyzer indicated that metastatic melanoma tumors derived a large fraction of energy from OXPHOS. Taken together, these findings suggest that in stage IV melanomas with normal serum LDH, glycolysis and OXPHOS may provide metabolic symbiosis within the same tumor, whereas in stage IV melanomas with high serum LDH glycolysis is the principle source of energy.

  15. Tumoral Melanosis Associated with Pembrolizumab-Treated Metastatic Melanoma

    Science.gov (United States)

    Cohen, Philip R

    2017-01-01

    Tumoral melanosis is a form of completely regressed melanoma that usually presents as darkly pigmented lesions suspicious for malignant melanoma. Histology reveals dense dermal and subcutaneous infiltration of melanophages. Pembrolizumab is an antibody directed against programmed death receptor-1 (PD1) and is frontline treatment for advanced melanoma. An 81-year-old man with metastatic melanoma treated with pembrolizumab who developed tumoral melanosis at previous sites of metastases is described. The PubMed database was searched with the key words: antibody, immunotherapy, melanoma, melanosis, metastasis, pembrolizumab, and tumoral. The papers generated by the search and their references were reviewed. The patient was initially diagnosed with lentigo maligna melanoma on the left cheek three years earlier, and he was treated with wide local excision. The patient was subsequently diagnosed with epidermotropic metastatic malignant melanoma on the left parietal scalp 14 months later and was treated with wide local excision. Three months later, the patient was found to have metastatic melanoma in the same area of the scalp and was started on pembrolizumab immunotherapy. The patient was diagnosed with tumoral melanosis in the site of previous metastases nine months later. The patient remained free of disease 13 months after starting pembrolizumab. Tumoral melanosis may mimic malignant melanoma; hence a workup, including skin biopsy, should be undertaken. Extensive tumoral melanosis has been reported with ipilimumab, and we add a case following treatment with pembrolizumab. Additional cases of tumoral melanosis may present since immunotherapy has become frontline therapy for advanced melanoma.  PMID:28348944

  16. Whole-genome landscapes of major melanoma subtypes.

    Science.gov (United States)

    Hayward, Nicholas K; Wilmott, James S; Waddell, Nicola; Johansson, Peter A; Field, Matthew A; Nones, Katia; Patch, Ann-Marie; Kakavand, Hojabr; Alexandrov, Ludmil B; Burke, Hazel; Jakrot, Valerie; Kazakoff, Stephen; Holmes, Oliver; Leonard, Conrad; Sabarinathan, Radhakrishnan; Mularoni, Loris; Wood, Scott; Xu, Qinying; Waddell, Nick; Tembe, Varsha; Pupo, Gulietta M; De Paoli-Iseppi, Ricardo; Vilain, Ricardo E; Shang, Ping; Lau, Loretta M S; Dagg, Rebecca A; Schramm, Sarah-Jane; Pritchard, Antonia; Dutton-Regester, Ken; Newell, Felicity; Fitzgerald, Anna; Shang, Catherine A; Grimmond, Sean M; Pickett, Hilda A; Yang, Jean Y; Stretch, Jonathan R; Behren, Andreas; Kefford, Richard F; Hersey, Peter; Long, Georgina V; Cebon, Jonathan; Shackleton, Mark; Spillane, Andrew J; Saw, Robyn P M; López-Bigas, Núria; Pearson, John V; Thompson, John F; Scolyer, Richard A; Mann, Graham J

    2017-05-11

    Melanoma of the skin is a common cancer only in Europeans, whereas it arises in internal body surfaces (mucosal sites) and on the hands and feet (acral sites) in people throughout the world. Here we report analysis of whole-genome sequences from cutaneous, acral and mucosal subtypes of melanoma. The heavily mutated landscape of coding and non-coding mutations in cutaneous melanoma resolved novel signatures of mutagenesis attributable to ultraviolet radiation. However, acral and mucosal melanomas were dominated by structural changes and mutation signatures of unknown aetiology, not previously identified in melanoma. The number of genes affected by recurrent mutations disrupting non-coding sequences was similar to that affected by recurrent mutations to coding sequences. Significantly mutated genes included BRAF, CDKN2A, NRAS and TP53 in cutaneous melanoma, BRAF, NRAS and NF1 in acral melanoma and SF3B1 in mucosal melanoma. Mutations affecting the TERT promoter were the most frequent of all; however, neither they nor ATRX mutations, which correlate with alternative telomere lengthening, were associated with greater telomere length. Most melanomas had potentially actionable mutations, most in components of the mitogen-activated protein kinase and phosphoinositol kinase pathways. The whole-genome mutation landscape of melanoma reveals diverse carcinogenic processes across its subtypes, some unrelated to sun exposure, and extends potential involvement of the non-coding genome in its pathogenesis.

  17. Towards therapeutic advances in melanoma management: An overview.

    Science.gov (United States)

    Singh, Swarnendra; Zafar, Atif; Khan, Saman; Naseem, Imrana

    2017-04-01

    Melanoma is one of the most aggressive types of skin cancer with rapidly increasing incidence rate. The disease is largely considered incurable and the patients diagnosed with metastatic melanoma have a survival of not more than five years. Despite of the recent advances in anti-melanoma chemo- and immunotherapies, the available drugs are relatively toxic and responsive to only a limited subset of lesions. Currently, topical pharmacotherapy is demonstrated as an effective approach for the treatment of various skin cancers. Also, in vitro testing of melanoma cell lines and murine melanoma models has identified a number of relatively safe and effective phytochemicals. In this review, we described the use of topical pharmacotherapy for the treatment of skin cancers. Melanoma treatment by drugs targeting MAPK-pathway has also been discussed. Long non-coding RNAs and therapeutics targeting ER-associated pathways looks quite promising for the treatment of melanoma. Moreover, some natural anticancer compounds that have been reported to have anti-melanoma effects have also been described. At present a better understanding of genetics and epigenetics of initiation and progression of melanoma is needed for the identification of novel biomarkers and development of targeted therapeutics against melanoma. Copyright © 2017 Elsevier Inc. All rights reserved.

  18. Nasal pungency and odor of homologous aldehydes and carboxylic acids.

    Science.gov (United States)

    Cometto-Muñiz, J E; Cain, W S; Abraham, M H

    1998-01-01

    Airborne substances can stimulate both the olfactory and the trigeminal nerve in the nose, giving rise to odor and pungent (irritant) sensations, respectively. Nose, eye, and throat irritation constitute common adverse effects in indoor environments. We measured odor and nasal pungency thresholds for homologous aliphatic aldehydes (butanal through octanal) and carboxylic acids (formic, acetic, butanoic, hexanoic, and octanoic). Nasal pungency was measured in subjects lacking olfaction (i.e., anosmics) to avoid odor biases. Similar to other homologous series, odor and pungency thresholds declined (i.e., sensory potency increased) with increasing carbon chain length. A previously derived quantitative structure-activity relationship (QSAR) based on solvation energies predicted all nasal pungency thresholds, except for acetic acid, implying that a key step in the mechanism for threshold pungency involves transfer of the inhaled substance from the vapor phase to the receptive biological phase. In contrast, acetic acid - with a pungency threshold lower than predicted - is likely to produce threshold pungency through direct chemical reaction with the mucosa. Both in the series studied here and in those studied previously, we reach a member at longer chain-lengths beyond which pungency fades. The evidence suggests a biological cut-off, presumably based upon molecular size, across the various series.

  19. Measurements Alcohols, Ketones, and Aldehydes During Trace-P

    Science.gov (United States)

    Apel, E. C.; Riemer, D. D.; Hills, A.; Lueb, R.; Fried, A.; Sachse, G.; Crawford, J.; Singh, H.; Blake, D.

    2002-12-01

    A sensitive and selective instrument (fast gas chromatographic mass spectrometer - FGCMS) was developed for the continuous measurement of oxygenated volatile organic compounds (OVOCs: alcohols, ketones and aldehydes (except for formaldehyde)) containing fewer than 6 carbon atoms and subsequently deployed during the NASA's TRACE-P (Transport and Chemical Evolution over the Pacific) experiment. This paper will briefly describe the instrument and present results obtained from 15 mission flights. Dramatic differences were observed in the mixing ratios and vertical profiles of the longer-lived species, acetone and methanol, compared to the shorter-lived species. For example, between 6 and 7 km, the median mixing ratios for the two longest lived species measured, acetone and methanol, are 765 pptv and 1061 pptv, respectively whereas the combined mixing ratio for all other species measured was less than 500 pptv. A large variety of air masses were encountered during this experiment and this is reflected in the behavior of the measured OVOCs. Relationships between the OVOCs and other trace species will be explored. Implications of these measurements for our current understanding of global tropospheric chemistry will be discussed.

  20. Coniferyl Aldehyde Ameliorates Radiation Intestine Injury via Endothelial Cell Survival

    Energy Technology Data Exchange (ETDEWEB)

    Jeong, Ye Ji; Jung, Myung Gu; Lee, Yoonjin; Lee, Haejune [Korea Institute of Radiological and Medical Sciences, Seoul (Korea, Republic of); Lee, Yunsil [Ewha Woman' s Univ., Seoul (Korea, Republic of); Ko, Younggyu [Korea Univ., Seoul (Korea, Republic of)

    2014-05-15

    Cancer treatments related gastrointestinal toxicity has also been recognized as a significant economic burden. Especially, extensive apoptosis of microvascular endothelial cell of the lamina propria is the primary lesion initiating intestinal radiation damage after abdominal radiation therapy. Coniferyl aldehyde (CA) is phenolic compounds isolated from cork stoppers, and one of the major pyrolysis products of lignin. Shi H. was support for the empirical use of CA as a medicinal food for cardiovascular diseases. CA has positive effect in broad way but there is no consequence in radiation induced intestine damage. Here, we investigate effect of CA on small intestine after abdominal IR to mice in this study. In this study, CA increased the survival rate in C3H mice against 13.5 Gy abdominal IR. We found CA protects small intestine via preventing endothelial cell apoptosis and enhancing their angiogenic activity. CA also showed protective effect on crypt cell survival. Endothelial cell survival may affect crypt cell protection against IR. From this data, we concluded that CA is effective for protection against abdominal radiation injury. CA could ameliorate side-effect of radiation therapy.

  1. Sodium borohydride removes aldehyde inhibitors for enhancing biohydrogen fermentation.

    Science.gov (United States)

    Lin, Richen; Cheng, Jun; Ding, Lingkan; Song, Wenlu; Zhou, Junhu; Cen, Kefa

    2015-12-01

    To enhance biohydrogen production from glucose and xylose in the presence of aldehyde inhibitors, reducing agent (i.e., sodium borohydride) was in situ added for effective detoxification. The detoxification efficiencies of furfural (96.7%) and 5-hydroxymethylfurfural (5-HMF, 91.7%) with 30mM NaBH4 were much higher than those of vanillin (77.3%) and syringaldehyde (69.3%). Biohydrogen fermentation was completely inhibited without detoxification, probably because of the consumption of nicotinamide adenine dinucleotide (NADH) by inhibitors reduction (R-CHO+2NADH→R-CH2OH+2NAD(+)). Addition of 30mM NaBH4 provided the reducing power necessary for inhibitors reduction (4R-CHO+NaBH4+2H2O→4R-CH2OH+NaBO2). The recovered reducing power in fermentation resulted in 99.3% recovery of the hydrogen yield and 64.6% recovery of peak production rate. Metabolite production and carbon conversion after detoxification significantly increased to 63.7mM and 81.9%, respectively.

  2. A new resistance source of aldehyde reductase functions from Scheffersomyces stipitis against biomass fermentation inhibitor furfural

    Science.gov (United States)

    Aldehyde inhibitory compounds derived from lignocellulosic biomass pretreatment are a major class of toxic chemicals that interfere with microbial growth and subsequent fermentation for advanced biofuels production. This study identified five uncharacterized putative genes of Scheffersomyces stipiti...

  3. Fatty aldehydes in cyanobacteria are a metabolically flexible precursor for a diversity of biofuel products

    National Research Council Canada - National Science Library

    Kaiser, Brett K; Carleton, Michael; Hickman, Jason W; Miller, Cameron; Lawson, David; Budde, Mark; Warrener, Paul; Paredes, Angel; Mullapudi, Srinivas; Navarro, Patricia; Cross, Fred; Roberts, James M

    2013-01-01

    We describe how pathway engineering can be used to convert a single intermediate derived from lipid biosynthesis, fatty aldehydes, into a variety of biofuel precursors including alkanes, free fatty acids and wax esters...

  4. Oxidative Esterification of Aldehydes with Urea Hydrogen Peroxide Catalyzed by Aluminum Chloride Hexahydrate

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Sin-Ae; Kim, Yoon Mi; Lee, Jong Chan [Chung-Ang University, Seoul (Korea, Republic of)

    2016-08-15

    We have developed a new, environmentally benign and highly efficient oxidative preparation of methyl esters by the reaction of various aldehydes with UHP in methanol catalyzed by readily accessible aluminum(III) chloride hexahydrate. This new greener and cost effective direct esterification method can serve as a useful alternative to existing protocols. Esters are some of the most important functional groups in organic chemistry and have been found in the sub-structure of a variety of natural products, industrial chemicals, and pharmaceuticals. Numerous methods have been reported for the preparation of various esters. In particular, this method gives low yields for both aldehydes containing electron donating substituents in aromatic rings and heterocyclic aldehydes. Therefore, development of a more general, efficient, and greener protocol for the esterification of aldehydes with readily available catalyst is still desirable.

  5. A Direct Transformation of Aryl Aldehydes to Benzyl Iodides Via Reductive Iodination

    Energy Technology Data Exchange (ETDEWEB)

    Ruso, Jayaraman Sembian; Rajendiran, Nagappan; Kumaran, Rajendran Senthil [Univ. of Madras, Chennai (India)

    2014-02-15

    A facile transformation of aryl aldehydes to benzyl iodides through one-pot reductive iodination is reported. This protocol displays remarkable functional group tolerance and the title compound was obtained in good to excellent yield.

  6. Microwave Assisted Solvent Free Synthesis of Azomethines from Aryl Aldehydes on Melamin Formaldehyde as Solid Support

    Directory of Open Access Journals (Sweden)

    Ramin Rezaei

    2011-01-01

    Full Text Available Various aryl aldehydes underwent prompt one pot conversion into the corresponding azomethines in high yields by reacting with hydroxylamine hydrochloride supported on melamine formaldehyde under microwave irradiation.

  7. The applications of Schiff bases in Ti-catalyzed asymmetric alkynylation of aldehydes

    Institute of Scientific and Technical Information of China (English)

    Xian Jia; Lu Yin; Xuan Zhao; Xing Shu Li

    2007-01-01

    Sciff bases 1 and 2, which were derived from chiral aminoalcohols, were used as ligands in Ti-catalyzed asymmetric alkynylation of aldehydes. Good enantioselectivities (up to 88% ee) and high chemical yields (80-90 %) were obtained.

  8. Role of Lipid Peroxidation-Derived α, β-Unsaturated Aldehydes in Vascular Dysfunction

    Directory of Open Access Journals (Sweden)

    Seung Eun Lee

    2013-01-01

    Full Text Available Vascular diseases are the most prominent cause of death, and inflammation and vascular dysfunction are key initiators of the pathophysiology of vascular disease. Lipid peroxidation products, such as acrolein and other α, β-unsaturated aldehydes, have been implicated as mediators of inflammation and vascular dysfunction. α, β-Unsaturated aldehydes are toxic because of their high reactivity with nucleophiles and their ability to form protein and DNA adducts without prior metabolic activation. This strong reactivity leads to electrophilic stress that disrupts normal cellular function. Furthermore, α, β-unsaturated aldehydes are reported to cause endothelial dysfunction by induction of oxidative stress, redox-sensitive mechanisms, and inflammatory changes such as induction of cyclooxygenase-2 and cytokines. This review provides an overview of the effects of lipid peroxidation products, α, β-unsaturated aldehydes, on inflammation and vascular dysfunction.

  9. In vitro antibacterial activity of some aliphatic aldehydes from Olea europaea L.

    Science.gov (United States)

    Bisignano, G; Laganà, M G; Trombetta, D; Arena, S; Nostro, A; Uccella, N; Mazzanti, G; Saija, A

    2001-04-20

    In the present paper we report the 'in vitro' activity of eight aliphatic long-chain aldehydes from olive flavor (hexanal, nonanal, (E)-2-hexenal, (E)-2-eptenal, (E)-2-octenal, (E)-2-nonenal, (E)-2-decenal and (E,E)-2,4-decadienal) against a number of standard and freshly isolated bacterial strains that may be causal agents of human intestinal and respiratory tract infections. The saturated aldehydes characterized in the present study do not exhibit significant antibacterial activity, while the alpha,beta-unsaturated aldehydes have a broad antimicrobial spectrum and show similar activity against Gram-positive and Gram-negative microorganisms. The effectiveness of the aldehydes under investigation seems to depend not only on the presence of the alpha,beta-double bond, but also on the chain length from the enal group and on the microorganism tested.

  10. Ambient Ionic Liquids Used in the Reduction ofAldehydes and Ketones

    Institute of Scientific and Technical Information of China (English)

    Dan Qian XU; Shu Ping LUO; Bao You LIU; Zhen Yuan XU; Yin Chu SHEN

    2004-01-01

    The sodium borohydride reduction of aldehydes and ketones to corresponding alcohols has been accomplished via the use of ionic liquids. The alcohols are easily obtained with excellent yields and the ionic liquid BMImBF4 could be reused.

  11. Direct preparation of copper organometallics bearing an aldehyde function via an iodine-copper exchange.

    Science.gov (United States)

    Yang, Xiaoyin; Knochel, Paul

    2006-06-21

    The iodine-copper exchange reaction allows the direct preparation of various aryl, heteroaryl and alkenyl cuprates bearing a formyl group, thus allowing a direct synthesis of polyfunctional aldehydes without the need of protecting groups or an additional oxidation step.

  12. Blue light inhibits proliferation of melanoma cells

    Science.gov (United States)

    Becker, Anja; Distler, Elisabeth; Klapczynski, Anna; Arpino, Fabiola; Kuch, Natalia; Simon-Keller, Katja; Sticht, Carsten; van Abeelen, Frank A.; Gretz, Norbert; Oversluizen, Gerrit

    2016-03-01

    Photobiomodulation with blue light is used for several treatment paradigms such as neonatal jaundice, psoriasis and back pain. However, little is known about possible side effects concerning melanoma cells in the skin. The aim of this study was to assess the safety of blue LED irradiation with respect to proliferation of melanoma cells. For that purpose we used the human malignant melanoma cell line SK-MEL28. Cell proliferation was decreased in blue light irradiated cells where the effect size depended on light irradiation dosage. Furthermore, with a repeated irradiation of the melanoma cells on two consecutive days the effect could be intensified. Fluorescence-activated cell sorting with Annexin V and Propidium iodide labeling did not show a higher number of dead cells after blue light irradiation compared to non-irradiated cells. Gene expression analysis revealed down-regulated genes in pathways connected to anti-inflammatory response, like B cell signaling and phagosome. Most prominent pathways with up-regulation of genes were cytochrome P450, steroid hormone biosynthesis. Furthermore, even though cells showed a decrease in proliferation, genes connected to the cell cycle were up-regulated after 24h. This result is concordant with XTT test 48h after irradiation, where irradiated cells showed the same proliferation as the no light negative control. In summary, proliferation of melanoma cells can be decreased using blue light irradiation. Nevertheless, the gene expression analysis has to be further evaluated and more studies, such as in-vivo experiments, are warranted to further assess the safety of blue light treatment.

  13. Melanin content in melanoma metastases affects the outcome of radiotherapy.

    Science.gov (United States)

    Brożyna, Anna A; Jóźwicki, Wojciech; Roszkowski, Krzysztof; Filipiak, Jan; Slominski, Andrzej T

    2016-04-05

    Melanin possess radioprotective and scavenging properties, and its presence can affect the behavior of melanoma cells, its surrounding environment and susceptibility to the therapy, as showed in vitro experiments. To determine whether melanin presence in melanoma affects the efficiency of radiotherapy (RTH) we evaluated the survival time after RTH treatment in metastatic melanoma patients (n = 57). In another cohort of melanoma patients (n = 84), the relationship between melanin level and pT and pN status was determined. A significantly longer survival time was found in patients with amelanotic metastatic melanomas in comparison to the melanotic ones, who were treated with either RTH or chemotherapy (CHTH) and RTH. These differences were more significant in a group of melanoma patients treated only with RTH. A detailed analysis of primary melanomas revealed that melanin levels were significantly higher in melanoma cells invading reticular dermis than the papillary dermis. A significant reduction of melanin pigmentation in pT3 and pT4 melanomas in comparison to pT1 and T2 tumors was observed. However, melanin levels measured in pT3-pT4 melanomas developing metastases (pN1-3, pM1) were higher than in pN0 and pM0 cases. The presence of melanin in metastatic melanoma cells decreases the outcome of radiotherapy, and melanin synthesis is related to higher disease advancement. Based on our previous cell-based and clinical research and present research we also suggest that inhibition of melanogenesis can improve radiotherapy modalities. The mechanism of relationship between melanogenesis and efficacy of RTH requires additional studies, including larger melanoma patients population and orthotopic, imageable mouse models of metastatic melanoma.

  14. Rh(I)-Catalyzed Intermolecular Hydroacylation: Enantioselective Cross-Coupling of Aldehydes and Ketoamides

    Science.gov (United States)

    2015-01-01

    Under Rh(I) catalysis, α-ketoamides undergo intermolecular hydroacylation with aliphatic aldehydes. A newly designed Josiphos ligand enables access to α-acyloxyamides with high atom-economy and enantioselectivity. On the basis of mechanistic and kinetic studies, we propose a pathway in which rhodium plays a dual role in activating the aldehyde for cross-coupling. A stereochemical model is provided to rationalize the sense of enantioinduction observed. PMID:24937681

  15. An Improved Protocol for the Aldehyde Olefination Reaction Using (bmim ( as Reaction Medium

    Directory of Open Access Journals (Sweden)

    Vivek Srivastava

    2013-01-01

    Full Text Available [Ru(CODCl2]/CuCl2·2H2O/LiCl catalytic system works efficiently in ionic liquid media for aldehyde olefination reaction. It offers good yield and selectivity with the added advantage of 5 times recyclability for [Ru(CODCl2] /CuCl2·2H2O/LiCl catalytic system. We also successfully reduced the reaction time from 12 hours to 9 hours for the aldehyde olefination reaction.

  16. Silicon Amine Reagents for the Photocatalytic Synthesis of Piperazines from Aldehydes and Ketones.

    Science.gov (United States)

    Hsieh, Sheng-Ying; Bode, Jeffrey W

    2016-05-06

    Silicon amine protocol (SLAP) reagents for photocatalytic cross-coupling with aldehydes and ketones to form N-unprotected piperazines have been developed. This blue light promoted process tolerates a wide range of heteroaromatic, aromatic, and aliphatic aldehydes and structurally and stereochemically complex SLAP reagents. It provides a tin-free alternative to SnAP (tin amine protocol) reagents for the synthesis of substituted piperazines.

  17. Oxidation of Group 8 transition-Metal Hydrides and Ionic Hydrogenation of Ketones and Aldehydes

    Energy Technology Data Exchange (ETDEWEB)

    Smith, Kjell-Tore

    1996-08-01

    Transition-metal hydrides have received considerable attention during the last decades because of their unusual reactivity and their potential as homogeneous catalysts for hydrogenation and other reactions of organic substrates. An important class of catalytic processes where transition-metal hydrides are involved is the homogeneous hydrogenation of alkenes, alkynes, ketones, aldehydes, arenes and nitro compounds. This thesis studies the oxidation of Group 8 transition-metal hydrides and the ionic hydrogenation of ketones and aldehydes.

  18. Iron-Catalyzed Regioselective Transfer Hydrogenative Couplings of Unactivated Aldehydes with Simple Alkenes.

    Science.gov (United States)

    Zheng, Yan-Long; Liu, Yan-Yao; Wu, Yi-Mei; Wang, Yin-Xia; Lin, Yu-Tong; Ye, Mengchun

    2016-05-17

    An FeBr3 -catalyzed reductive coupling of various aldehydes with alkenes that proceeds through a direct hydride transfer pathway has been developed. With (i) PrOH as the hydrogen donor under mild conditions, previously challenging coupling reactions of unactivated alkyl and aryl aldehydes with simple alkenes, such as styrene derivatives and α-olefins, proceeded smoothly to furnish a diverse range of functionalized alcohols with complete linear regioselectivity.

  19. Nitric Oxide Mediates the Stress Response Induced by Diatom Aldehydes in the Sea Urchin Paracentrotus lividus

    OpenAIRE

    Giovanna Romano; Maria Costantini; Isabella Buttino; Adrianna Ianora; Anna Palumbo

    2011-01-01

    Diatoms are ubiquitous and abundant primary producers that have been traditionally considered as a beneficial food source for grazers and for the transfer of carbon through marine food webs. However, many diatom species produce polyunsaturated aldehydes that disrupt development in the offspring of grazers that feed on these unicellular algae. Here we provide evidence that production of the physiological messenger nitric oxide increases after treatment with the polyunsaturated aldehyde decadie...

  20. Molecular Prognostic Markers in Uveal Melanoma: Expression Profiling and Genomic Studies

    NARCIS (Netherlands)

    W. Gils (Walter)

    2008-01-01

    textabstractUveal Melanomas (UMs) arise from melanocytes. This cell type originates from neural crest cells and thereby uveal melanomas share their origin with pheochromocytomas, neuroblastomas, paragangliomas and cutaneous melanomas, other tumors that develop from neural crest originating cells.

  1. Accurate determination of aldehydes in amine catalysts or amines by 2,4-dinitrophenylhydrazine derivatization.

    Science.gov (United States)

    Barman, Bhajendra N

    2014-01-31

    Carbonyl compounds, specifically aldehydes, present in amine catalysts or amines are determined by reversed-phase liquid chromatography using ultraviolet detection of their corresponding 2,4-dinitrophenylhydrazones. The primary focus has been to establish optimum conditions for determining aldehydes accurately because these add exposure concerns when the amine catalysts are used to manufacture polyurethane products. Concentrations of aldehydes determined by this method are found to vary with the pH of the aqueous amine solution and the derivatization time, the latter being problematic when the derivatization reaction proceeds slowly and not to completion in neutral and basic media. Accurate determination of aldehydes in amines through derivatization can be carried out at an effective solution pH of about 2 and with derivatization time of 20min. Hydrochloric acid has been used for neutralization of an amine. For complete derivatization, it is essential to protonate all nitrogen atoms in the amine. An approach for the determination of an adequate amount of acid needed for complete derivatization has been described. Several 0.2M buffer solutions varying in pH from 4 to 8 have also been used to make amine solutions for carrying out derivatization of aldehydes. These solutions have effective pHs of 10 or higher and provide much lower aldehyde concentrations compared to their true values. Mechanisms for the formation of 2,4-dinitrophenylhydrazones in both acidic and basic media are discussed.

  2. Release and Formation of Oxidation-Related Aldehydes during Wine Oxidation.

    Science.gov (United States)

    Bueno, Mónica; Carrascón, Vanesa; Ferreira, Vicente

    2016-01-27

    Twenty-four Spanish wines were subjected to five consecutive cycles of air saturation at 25 °C. Free and bound forms of carbonyls were measured in the initial samples and after each saturation. Nonoxidized commercial wines contain important and sensory relevant amounts of oxidation-related carbonyls under the form of odorless bound forms. Models relating the contents in total aldehydes to the wine chemical composition suggest that fermentation can be a major origin for Strecker aldehydes: methional, phenylacetaldehyde, isobutyraldehyde, 2-methylbutanal, and isovaleraldehyde. Bound forms are further cleaved, releasing free aldehydes during the first steps of wine oxidation, as a consequence of equilibrium shifts caused by the depletion of SO2. At low levels of free SO2, de novo formation and aldehyde degradation are both observed. The relative importance of these phenomena depends on both the aldehyde and the wine. Models relating aldehyde formation rates to wine chemical composition suggest that amino acids are in most cases the most important precursors for de novo formation.

  3. Brain and Liver Headspace Aldehyde Concentration Following Dietary Supplementation with n-3 Polyunsaturated Fatty Acids.

    Science.gov (United States)

    Ross, Brian M; Babay, Slim; Malik, Imran

    2015-11-01

    Reactive oxygen species react with unsaturated fatty acids to form a variety of metabolites including aldehydes. Many aldehydes are volatile enough to be detected in headspace gases of blood or cultured cells and in exhaled breath, in particular propanal and hexanal which are derived from omega-3 and omega-6 polyunsaturated fatty acids, respectively. Aldehydes are therefore potential non-invasive biomarkers of oxidative stress and of various diseases in which oxidative stress is thought to play a role including cancer, cardiovascular disease and diabetes. It is unclear, however, how changes in the abundance of the fatty acid precursors, for example by altered dietary intake, affect aldehyde concentrations. We therefore fed male Wistar rats diets supplemented with either palm oil or a combination of palm oil plus an n-3 fatty acid (alpha-linolenic, eicosapentaenoic, or docosahexaenoic acids) for 4 weeks. Fatty acid analysis revealed large changes in the abundance of both n-3 and n-6 fatty acids in the liver with smaller changes observed in the brain. Despite the altered fatty acid abundance, headspace concentrations of C1-C8 aldehydes, and tissue concentrations of thiobarbituric acid reactive substances, did not differ between the 4 dietary groups. Our data suggest that tissue aldehyde concentrations are independent of fatty acid abundance, and further support their use as volatile biomarkers of oxidative stress.

  4. Posterior mediastinal melanoma causing severe dysphagia: A case report

    Directory of Open Access Journals (Sweden)

    Meacci Elisa

    2008-09-01

    Full Text Available Abstract Introduction We describe an original case of progressive severe dysphagia caused by a posterior mediastinal metastatic melanoma of unknown origin. To the best of our knowledge, such an event has never been described before in the literature. Case presentation A progressive severe dysphagia case is reported induced by a melanoma of unknown origin (metastatic to a posterior mediastinal lymph node. At the time of diagnosis, the lesion appeared as a large posterior mediastinal mass mimicking a neurogenic tumour with oesophageal involvement. After complete resection, pathological assessment of the tumour by immunohistochemistry was consistent with nodal metastatic melanoma. Conclusion This report of a posterior mediastinal lymph node melanoma is unique. The nodal origin is definitely unusual: a primary melanoma should always be carefully ruled out. In fact no other evidence, a part from the absence of the tumour elsewhere, can support the diagnosis of a primary nodal melanoma.

  5. Animal models of melanoma: a somatic cell gene delivery mouse model allows rapid evaluation of genesimplicated in human melanoma%Animal models of melanoma: a somatic cell gene delivery mouse model allows rapid evaluation of genes implicated in human melanoma

    Institute of Scientific and Technical Information of China (English)

    Andrea J. McKinney; Sheri L. Holmen

    2011-01-01

    The increasing incidence and mortality associated with advanced stages of melanoma are cause for concern. Few treatment options are available for advanced melanoma and the 5-year survival rate is less than 15%. Targeted therapies may revolutionize melanoma treatment by providing less toxic and more effective strategies. However, maximizing effectiveness requires further understanding of the molecular alterations that drive tumor formation, progression, and maintenance, as well as elucidating the mechanisms of resistance. Several different genetic alterations identified in human melanoma have been recapitulated in mice. This review outlines recent progress made in the development of mouse models of melanoma and summarizes what these findings reveal about the human disease. We begin with a discussion of traditional models and conclude with the recently developed RCAS/TVA somatic cell gene delivery mouse model of melanoma.

  6. Ability to self-detect malignant melanoma decreases with age

    DEFF Research Database (Denmark)

    Trolle, L; Henrik-Nielsen, R; Gniadecki, R

    2011-01-01

    The prognosis of malignant melanoma depends on the thickness of the tumour. In this study, we analysed the trends in Breslow thickness in 63 patients referred to our institution, a tertiary dermatology referral centre. The mean thickness of melanoma was 0.31 mm, which was lower than the national...... average of 1.10 mm. There was a significant trend towards increased melanoma thickness with increasing age, with a rate of 0.24 mm (95% CI 0.12-0.37) for each additional 10 years of age above the age of 20 years. This trend was only apparent in cases of self-diagnosed melanomas; the thickness of tumours...... diagnosed by a dermatologist did not show any dependence on patient age. As the mortality from melanoma increases with age, this study suggests that dermatologists should include older people in screening programmes for melanoma....

  7. DMBT1 expression distinguishes anorectal from cutaneous melanoma

    DEFF Research Database (Denmark)

    Helmke, Burkhard Maria; Renner, Marcus; Poustka, Annemarie

    2009-01-01

    AIMS: Anorectal melanoma (AM) forms a rare but highly malignant subset of mucosal melanoma with an extremely poor prognosis. Although AMs display histological and immunohistochemical features very similar to cutaneous melanoma (CM), no association exists either with exposure to ultraviolet light...... tumours 1 (DMBT1) in cases of primary anorectal malignant melanoma and CM. METHODS AND RESULTS: Expression analyses of classical immunohistochemical markers (S100, HMB45, Melan A and MiTF) and of the protein DMBT1 were carried out in 27 cases of primary anorectal malignant melanoma and 26 cases of CM. All...... AM cases analysed showed expression of at least three of the classical markers for melanoma. However, immunohistochemistry showed 19 out of 27 AM to be positive for DMBT1, which represented a statistically significant difference (P = 0.0009) compared with CM (six out of 26), which more commonly...

  8. Melanoma and obesity: Should antioxidant vitamins be addressed?

    Science.gov (United States)

    Oliveira, Sofia; Coelho, Pedro; Prudêncio, Cristina; Vieira, Mónica; Soares, Raquel; Guerreiro, Susana G; Fernandes, Rúben

    2016-11-15

    Melanoma is an aggressive form of skin cancer refractory to conventional therapies. Obesity has reached epidemic dimensions acting as a risk factor for several cancer types, such as melanoma. Several reactive species of oxygen are also involved in melanoma initiation and progression. Low levels of antioxidant content and/or activity in lightly pigmented cells could expose them to an extremely oxidative environment and rise the susceptibility to oxidative damage and consequently loss of cell homeostasis. Despite the knowledge about melanoma biology, pathogenesis and developed therapies, is extremely important to understand the antioxidant modulation of melanoma under an environment of obesity, especially the effect of some natural compounds of the diet, such as antioxidant vitamins A, C and E and selenium in order to establish alternatives to conventional therapies, which are known to be ineffective against melanoma.

  9. The NF1 gene in tumor syndromes and melanoma.

    Science.gov (United States)

    Kiuru, Maija; Busam, Klaus J

    2017-02-01

    Activation of the RAS/MAPK pathway is critical in melanoma. Melanoma can be grouped into four molecular subtypes based on their main genetic driver: BRAF-mutant, NRAS-mutant, NF1-mutant, and triple wild-type tumors. The NF1 protein, neurofibromin 1, negatively regulates RAS proteins through GTPase activity. Germline mutations in NF1 cause neurofibromatosis type I, a common genetic tumor syndrome caused by dysregulation of the RAS/MAPK pathway, ie, RASopathy. Melanomas with NF1 mutations typically occur on chronically sun-exposed skin or in older individuals, show a high mutation burden, and are wild-type for BRAF and NRAS. Additionally, NF1 mutations characterize certain clinicopathologic melanoma subtypes, specifically desmoplastic melanoma. This review discusses the current knowledge of the NF1 gene and neurofibromin 1 in neurofibromatosis type I and in melanoma.

  10. Early Detection and Classification of Melanoma Skin Cancer

    Directory of Open Access Journals (Sweden)

    Abbas Hanon. Alasadi

    2015-10-01

    Full Text Available Melanoma is a form of cancer that begins in melanocytes (cells that make the pigment melanin. It can affect the skin only, or it may spread to the organs and bones. It is less common, but more serious and aggressive than other types of skin cancer. Melanoma can be of benign or malignant. Malignant melanoma is the dangerous condition, while benign is not. In order to reduce the death rate due to malignant melanoma skin cancer, it is necessary to diagnose it at an early stage. In this paper, a detection system has been designed for diagnosing melanoma in early stages by using digital image processing techniques. The system consists of two phases: the first phase detects whether the pigmented skin lesion is malignant or benign; the second phase recognizes malignant melanoma skin cancer types. Both first and second phases have several stages. The experimental results are acceptable.

  11. Ability to self-detect malignant melanoma decreases with age

    DEFF Research Database (Denmark)

    Trolle, L; Henrik-Nielsen, R; Gniadecki, R

    2011-01-01

    The prognosis of malignant melanoma depends on the thickness of the tumour. In this study, we analysed the trends in Breslow thickness in 63 patients referred to our institution, a tertiary dermatology referral centre. The mean thickness of melanoma was 0.31 mm, which was lower than the national...... average of 1.10 mm. There was a significant trend towards increased melanoma thickness with increasing age, with a rate of 0.24 mm (95% CI 0.12-0.37) for each additional 10 years of age above the age of 20 years. This trend was only apparent in cases of self-diagnosed melanomas; the thickness of tumours...... diagnosed by a dermatologist did not show any dependence on patient age. As the mortality from melanoma increases with age, this study suggests that dermatologists should include older people in screening programmes for melanoma....

  12. PD-1 and PD-L1 antibodies for melanoma.

    Science.gov (United States)

    Tsai, Katy K; Zarzoso, Inés; Daud, Adil I

    2014-01-01

    Melanoma is the most serious form of skin cancer. Metastatic melanoma historically carries a poor prognosis and until recently there have been few effective agents available to treat widely disseminated disease. Recognition of the immunogenic nature of melanoma has resulted in the development of various immunotherapeutic approaches, especially with regards to the programmed cell death 1 (PD-1) receptor and its ligand (PD-L1). Antibodies targeting the PD-1 axis have shown enormous potential in the treatment of metastatic melanoma. Here, we will review the immune basis for the disease and discuss approved immunotherapeutic options for advanced melanoma, as well as the current state of development of PD-1 and PD-L1 antibodies and their importance in shaping the future of melanoma treatment.

  13. Metastatic melanoma treatment: Combining old and new therapies.

    Science.gov (United States)

    Davey, Ryan J; van der Westhuizen, Andre; Bowden, Nikola A

    2016-02-01

    Metastatic melanoma is an aggressive form of cancer characterised by poor prognosis and a complex etiology. Until 2010, the treatment options for metastatic melanoma were very limited. Largely ineffective dacarbazine, temozolamide or fotemustine were the only agents in use for 35 years. In recent years, the development of molecularly targeted inhibitors in parallel with the development of checkpoint inhibition immunotherapies has rapidly improved the outcomes for metastatic melanoma patients. Despite these new therapies showing initial promise; resistance and poor duration of response have limited their effectiveness as monotherapies. Here we provide an overview of the history of melanoma treatment, as well as the current treatments in development. We also discuss the future of melanoma treatment as we go beyond monotherapies to a combinatorial approach. Combining older therapies with the new molecular and immunotherapies will be the most promising way forward for treatment of metastatic melanoma. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

  14. Malignant melanoma with liver and spleen metastases: case report

    Directory of Open Access Journals (Sweden)

    Laura Cotta Ornellas

    2000-03-01

    Full Text Available CONTEXT: The diagnosis of primary melanoma is easily confirmed after histological analysis of the lesion, whereas it is rarely diagnosed when the patient even has distant metastases. DESIGN: Case report CASE REPORT: Malignant melanoma is responsible for about 1% of all deaths caused by cancer in the USA and only 3% of all malig-nant skin diseases. Malignant melanoma is a rare disease, although it corresponds to 65% of all deaths caused by skin cancer. The liver and spleen are rarely the first sites of melanoma metastases. This paper reports on the clinical picture of a patient with fatal malignant melanoma and hepatic and spleen metastases. As this was an un-usual presentation, the melanoma diagnosis could only be made after pathological analysis of the skin and hepatic lesions.

  15. Therapeutic interventions to disrupt the protein synthetic machinery in melanoma.

    Science.gov (United States)

    Kardos, Gregory R; Robertson, Gavin P

    2015-09-01

    Control of the protein synthetic machinery is deregulated in many cancers, including melanoma, to increase the protein production. Tumor suppressors and oncogenes play key roles in protein synthesis from the transcription of rRNA and ribosome biogenesis to mRNA translation initiation and protein synthesis. Major signaling pathways are altered in melanoma to modulate the protein synthetic machinery, thereby promoting tumor development. However, despite the importance of this process in melanoma development, involvement of the protein synthetic machinery in this cancer type is an underdeveloped area of study. Here, we review the coupling of melanoma development to deregulation of the protein synthetic machinery. We examine existing knowledge regarding RNA polymerase I inhibition and mRNA translation focusing on their inhibition for therapeutic applications in melanoma. Furthermore, the contribution of amino acid biosynthesis and involvement of ribosomal proteins are also reviewed as future therapeutic strategies to target deregulated protein production in melanoma.

  16. Intracellular Metabolism of α,β-Unsaturated Carbonyl Compounds, Acrolein, Crotonaldehyde and Methyl Vinyl Ketone, Active Toxicants in Cigarette Smoke: Participation of Glutathione Conjugation Ability and Aldehyde-Ketone Sensitive Reductase Activity.

    Science.gov (United States)

    Horiyama, Shizuyo; Hatai, Mayuko; Takahashi, Yuta; Date, Sachiko; Masujima, Tsutomu; Honda, Chie; Ichikawa, Atsushi; Yoshikawa, Noriko; Nakamura, Kazuki; Kunitomo, Masaru; Takayama, Mitsuo

    2016-01-01

    The major toxicants in cigarette smoke, α,β-unsaturated aldehydes, such as acrolein (ACR) and crotonaldehyde (CA), and α,β-unsaturated ketone, methyl vinyl ketone (MVK), are known to form Michael-type adducts with glutathione (GSH) and consequently cause intracellular GSH depletion, which is involved in cigarette smoke-induced cytotoxicity. We have previously clarified that exposure to cigarette smoke extract (CSE) of a mouse melanoma cell culture medium causes rapid reduction of intracellular GSH levels, and that the GSH-MVK adduct can be detected by LC/MS analysis while the GSH-CA adduct is hardly detected. In the present study, to clarify why the GSH-CA adduct is difficult to detect in the cell medium, we conducted detailed investigation of the structures of the reaction products of ACR, CA, MVK and CSE in the GSH solution or the cell culture medium. The mass spectra indicated that in the presence of the cells, the GSH-CA and GSH-ACR adducts were almost not detected while their corresponding alcohols were detected. On the other hand, both the GSH-MVK adducts and their reduced products were detected. In the absence of the cells, the reaction of GSH with all α,β-unsaturated carbonyls produced only their corresponding adducts. These results show that the GSH adducts of α,β-unsaturated aldehydes, CA and ACR, are quickly reduced by certain intracellular carbonyl reductase(s) and excreted from the cells, unlike the GSH adduct of α,β-unsaturated ketone, MVK. Such a difference in reactivity to the carbonyl reductase might be related to differences in the cytotoxicity of α,β-unsaturated aldehydes and ketones.

  17. Approach to Malign Melanoma in Anorectal Area

    Directory of Open Access Journals (Sweden)

    Huseyin Pulat

    2014-12-01

    Full Text Available Aim: Anorectal malign melanoma comprise 0.2-1 % of all malign melanoma. They are extremely aggressive. Most patients are lost beacuse of incurable systemic illness. In our study, we aim to evaluate the results of surgical and oncological follow-up of our patients that we operated because of anorectal malign melanoma. Material and Method: Our 4 patients operated because of anorectal malign melanoma between October 2008 and April 2013 were analysed. The patients were analysed in terms of demographic datas, complaint and its time, physical examination and imaging findings, treatment procedure, local recurrence or presence of metastasis and follow-up results.Results: Our study group comprised 4 people (2 men and 2 women with the mean age of 64,2 years. The main complaint was rectal bleeding. The avarage complaint duration was 7.5 months. In all patients, anorectal mass was detected after physical examination and imaging studies. Biopsies of the mass were reported to be consistent with malign melanoma. With the further studies, one patient was detected to have metastasis in liver. Abdominoperineal resection was applied to one patient after wide local excision and to three patients during the first aplication. The avarage follow-up time was 19,25 months. The avarage diameter of tumor was 3,9 cm. One patient was applied lymph node dissection because of recurrence in iliac region. The avarage stay time at hospital of the patients who had no postoperative problems was 9,7 days. During follow-up time, three of the patients died because of common metastasis. A patient followed regularly is still continuing his life without illness in his postoperative 22nd month. Discussion: Anorectal malign melanoma is a rare, with a bad prognosis and a late diagnosed entity as it has a similarity with benign illnesses which are mostly seen in anorectal area in terms of clinical symptoma. To correct the prognosis of the illness, the suitable surgery and adjuvant treatment

  18. Surgery and radiotherapy in the treatment of cutaneous melanoma

    DEFF Research Database (Denmark)

    Testori, A; Rutkowski, P; Marsden, J;

    2009-01-01

    Adequate surgical management of primary melanoma and regional lymph node metastasis, and rarely distant metastasis, is the only established curative treatment. Surgical management of primary melanomas consists of excisions with 1-2 cm margins and primary closure. The recommended method of biopsy...... on individual circumstances. Radiotherapy is indicated as a treatment option in select patients with lentigo maligna melanoma and as an adjuvant in select patients with regional metastatic disease. Radiotherapy is also indicated for palliation, especially in bone and brain metastases....

  19. Prognostic factors of choroidal melanoma in Slovenia, 1986–2008

    Directory of Open Access Journals (Sweden)

    Jancar Boris

    2016-03-01

    Full Text Available Choroidal melanoma is the most common primary malignancy of the eye, which frequently metastasizes. The Cancer Registry of Slovenia reported the incidence of choroid melanoma from 1983 to 2009 as stable, at 7.8 cases/million for men and 7.4/million for women. The aim of the retrospective study was to determinate the prognostic factors of survival for choroidal melanoma patients in Slovenia.

  20. Clinical systemic lupeol administration for canine oral malignant melanoma

    OpenAIRE

    YOKOE, INORU; AZUMA, Kazuo; Hata, Keishi; MUKAIYAMA, TOSHIYUKI; Goto, Takahiro; Tsuka, Takeshi; Imagawa, Tomohiro; ITOH, Norihiko; Murahata, Yusuke; Osaki, Tomohiro; Minami, Saburo; Okamoto, Yoshiharu

    2014-01-01

    Canine oral malignant melanoma (COMM) is the most aggressive malignant tumor in dogs. Lupeol is a triterpene extracted from various fruits and vegetables that reportedly inhibits melanoma cell proliferation in vitro and in vivo. In this study, the efficacy of subcutaneous lupeol for spontaneous COMM was evaluated. A total of 11 dogs (3, 5 and 3 dogs diagnosed with clinical stage I, II and III melanoma, respectively) were evaluated. Subcutaneous lupeol (10 mg/kg) was administered postoperative...

  1. Detection of chondroitin sulfate proteoglycan 4 (CSPG4) in melanoma.

    Science.gov (United States)

    Wang, Yangyang; Sabbatino, Francesco; Wang, Xinhui; Ferrone, Soldano

    2014-01-01

    The tumor antigen chondroitin sulfate proteoglycan 4 (CSPG4) appears to be a useful biomarker to identify melanoma cells and an attractive target to apply antibody-based immunotherapy for the treatment of melanoma. Here we described the reverse transcription-polymerase chain reaction (RT-PCR) method and the immunohistochemical (IHC) staining method to detect the expression of CSPG4 in melanoma cells and tissues.

  2. Microsomal PGE2 synthase-1 regulates melanoma cell survival and associates with melanoma disease progression.

    Science.gov (United States)

    Kim, Sun-Hee; Hashimoto, Yuuri; Cho, Sung-Nam; Roszik, Jason; Milton, Denái R; Dal, Fulya; Kim, Sangwon F; Menter, David G; Yang, Peiying; Ekmekcioglu, Suhendan; Grimm, Elizabeth A

    2016-05-01

    COX-2 and its product PGE2 enhance carcinogenesis and tumor progression, which has been previously reported in melanoma. As most COX inhibitors cause much toxicity, the downstream microsomal PGE2 synthase-1 (mPGES1) is a consideration for targeting. Human melanoma TMAs were employed for testing mPGES1 protein staining intensity and percentage levels, and both increased with clinical stage; employing a different Stage III TMA, mPGES1 intensity (not percentage) associated with reduced patient survival. Our results further show that iNOS was also highly expressed in melanoma tissues with high mPGES1 levels, and iNOS-mediated NO promoted mPGES1 expression and PGE2 production. An mPGES1-specific inhibitor (CAY10526) as well as siRNA attenuated cell survival and increased apoptosis. CAY10526 significantly suppressed tumor growth and increased apoptosis in melanoma xenografts. Our findings support the value of a prognostic and predictive role for mPGES1, and suggest targeting this molecule in the PGE2 pathway as another avenue toward improving melanoma therapy.

  3. Para-Phenylenediamine Induces Apoptotic Death of Melanoma Cells and Reduces Melanoma Tumour Growth in Mice

    Directory of Open Access Journals (Sweden)

    Debajit Bhowmick

    2016-01-01

    Full Text Available Melanoma is one of the most aggressive forms of cancer, usually resistant to standard chemotherapeutics. Despite a huge number of clinical trials, any success to find a chemotherapeutic agent that can effectively destroy melanoma is yet to be achieved. Para-phenylenediamine (p-PD in the hair dyes is reported to purely serve as an external dyeing agent. Very little is known about whether p-PD has any effect on the melanin producing cells. We have demonstrated p-PD mediated apoptotic death of both human and mouse melanoma cells in vitro. Mouse melanoma tumour growth was also arrested by the apoptotic activity of intraperitoneal administration of p-PD with almost no side effects. This apoptosis is shown to occur primarily via loss of mitochondrial membrane potential (MMP, generation of reactive oxygen species (ROS, and caspase 8 activation. p-PD mediated apoptosis was also confirmed by the increase in sub-G0/G1 cell number. Thus, our experimental observation suggests that p-PD can be a potential less expensive candidate to be developed as a chemotherapeutic agent for melanoma.

  4. AIRE polymorphism, melanoma antigen-specific T cell immunity, and susceptibility to melanoma.

    Science.gov (United States)

    Conteduca, Giuseppina; Fenoglio, Daniela; Parodi, Alessia; Battaglia, Florinda; Kalli, Francesca; Negrini, Simone; Tardito, Samuele; Ferrera, Francesca; Salis, Annalisa; Millo, Enrico; Pasquale, Giuseppe; Barra, Giusi; Damonte, Gianluca; Indiveri, Francesco; Ferrone, Soldano; Filaci, Gilberto

    2016-09-20

    AIRE is involved in susceptibility to melanoma perhaps regulating T cell immunity against melanoma antigens (MA). To address this issue, AIRE and MAGEB2 expressions were measured by real time PCR in medullary thymic epithelial cells (mTECs) from two strains of C57BL/6 mice bearing either T or C allelic variant of the rs1800522 AIRE SNP. Moreover, the extent of apoptosis induced by mTECs in MAGEB2-specific T cells and the susceptibility to in vivo melanoma B16F10 cell challenge were compared in the two mouse strains.The C allelic variant, protective in humans against melanoma, induced lower AIRE and MAGEB2 expression in C57BL/6 mouse mTECs than the T allele. Moreover, mTECs expressing the C allelic variant induced lower extent of apoptosis in MAGEB2-specific syngeneic T cells than mTECs bearing the T allelic variant (p AIRE genotype than in those bearing the TT one (p AIRE SNP may differentially shape the MA-specific T cell repertoire potentially influencing susceptibility to melanoma.

  5. Aldehyde measurements in indoor environments in Strasbourg (France)

    Science.gov (United States)

    Marchand, C.; Bulliot, B.; Le Calvé, S.; Mirabel, Ph.

    Formaldehyde and acetaldehyde concentrations have been measured in indoor environments of various public spaces (railway station, airport, shopping center, libraries, underground parking garage, etc.) of Strasbourg area (east of France). In addition, formaldehyde, acetaldehyde propionaldehyde and hexanal concentrations have been measured in 22 private homes in the same area. In most of the sampling sites, indoor and outdoor formaldehyde and acetaldehyde concentrations were measured simultaneously. Gaseous aldehydes levels were quantified by a conventional DNHP-derivatization method followed by liquid chromatography coupled to UV detection. Outdoor formaldehyde and acetaldehyde concentrations were both in the range 1-10 μg m -3, the highest values being measured at the airport and railway station. Indoor concentrations were strongly dependant upon the sampling sites. In homes, the average concentrations were 37 μg m -3 (living rooms) and 46 μg m -3 (bedrooms) for formaldehyde, 15 μg m -3 (living rooms) and 18 μg m -3 (bedrooms) for acetaldehyde, 1.2 μg m -3 (living rooms) and 1.6 μg m -3 (bedrooms) for propionaldehyde, 9 μg m -3 (living rooms) and 10 μg m -3 (bedrooms) for hexanal. However, concentrations as high as 123, 80 and 47 μg m -3 have been found for formaldehyde, acetaldehyde and hexanal respectively. In public spaces, the highest formaldehyde concentration (62 μg m -3) was found in a library and the highest concentration of acetaldehyde (26 μg m -3) in the hall of a shopping center. Additional measurements of formaldehyde and acetaldehyde were made inside a car both at rest or in a fluid or heavy traffic as well as in a room where cigarettes were smoked. Our data have been discussed and compared with those of previous studies.

  6. Health-Beneficial Phenolic Aldehyde in Antigonon leptopus Tea

    Directory of Open Access Journals (Sweden)

    Vanisree Mulabagal

    2011-01-01

    Full Text Available Tea prepared from the aerial parts of Antigonon leptopus is used as a remedy for cold and pain relief in many countries. In this study, A. leptopus tea, prepared from the dried aerial parts, was evaluated for lipid peroxidation (LPO and cyclooxygenase (COX-1 and COX-2 enzyme inhibitory activities. The tea as a dried extract inhibited LPO, COX-1 and COX-2 enzymes by 78%, 38% and 89%, respectively, at 100 g/mL. Bioassay-guided fractionation of the extract yielded a selective COX-2 enzyme inhibitory phenolic aldehyde, 2,3,4-trihydroxy benzaldehyde. Also, it showed LPO inhibitory activity by 68.3% at 6.25 g/mL. Therefore, we have studied other hydroxy benzaldehydes and their methoxy analogs for LPO, COX-1 and COX-2 enzymes inhibitory activities and found that compound 1 gave the highest COX-2 enzyme inhibitory activity as indicated by a 50% inhibitory concentration (IC50 at 9.7 g/mL. The analogs showed only marginal LPO activity at 6.25 g/mL. The hydroxy analogs 6, 7 and 9 showed 55%, 61% and 43% of COX-2 inhibition at 100 g/mL. However, hydroxy benzaldehydes 3 and 12 showed selective COX-1 inhibition while compounds 4 and 10 gave little or no COX-2 enzyme inhibition at 100 g/mL. At the same concentration, compounds 14, 21 and 22 inhibited COX-1 by 83, 85 and 70%, respectively. Similarly, compounds 18, 19 and 23 inhibited COX-2 by 68%, 72% and 70%, at 100 g/mL. This is the first report on the isolation of compound 1 from A. leptopus tea with selective COX-2 enzyme and LPO inhibitory activities.

  7. Residues that influence coenzyme preference in the aldehyde dehydrogenases.

    Science.gov (United States)

    González-Segura, Lilian; Riveros-Rosas, Héctor; Julián-Sánchez, Adriana; Muñoz-Clares, Rosario A

    2015-06-01

    To find out the residues that influence the coenzyme preference of aldehyde dehydrogenases (ALDHs), we reviewed, analyzed and correlated data from their known crystal structures and amino-acid sequences with their published kinetic parameters for NAD(P)(+). We found that the conformation of the Rossmann-fold loops participating in binding the adenosine ribose is very conserved among ALDHs, so that coenzyme specificity is mainly determined by the nature of the residue at position 195 (human ALDH2 numbering). Enzymes with glutamate or proline at 195 prefer NAD(+) because the side-chains of these residues electrostatically and/or sterically repel the 2'-phosphate group of NADP(+). But contrary to the conformational rigidity of proline, the conformational flexibility of glutamate may allow NADP(+)-binding in some enzymes by moving the carboxyl group away from the 2'-phosphate group, which is possible if a small neutral residue is located at position 224, and favored if the residue at position 53 interacts with Glu195 in a NADP(+)-compatible conformation. Of the residues found at position 195, only glutamate interacts with the NAD(+)-adenosine ribose; glutamine and histidine cannot since their side-chain points are opposite to the ribose, probably because the absence of the electrostatic attraction by the conserved nearby Lys192, or its electrostatic repulsion, respectively. The shorter side-chains of other residues-aspartate, serine, threonine, alanine, valine, leucine, or isoleucine-are distant from the ribose but leave room for binding the 2'-phosphate group. Generally, enzymes having a residue different from Glu bind NAD(+) with less affinity, but they can also bind NADP(+) even sometimes with higher affinity than NAD(+), as do enzymes containing Thr/Ser/Gln195. Coenzyme preference is a variable feature within many ALDH families, consistent with being mainly dependent on a single residue that apparently has no other structural or functional roles, and therefore can

  8. A Search for CD36 Ligands from Flavor Volatiles in Foods with an Aldehyde Moiety: Identification of Saturated Aliphatic Aldehydes with 9-16 Carbon Atoms as Potential Ligands of the Receptor.

    Science.gov (United States)

    Tsuzuki, Satoshi; Amitsuka, Takahiko; Okahashi, Tatsuya; Kimoto, Yusaku; Inoue, Kazuo

    2017-08-09

    Volatile compounds with an aldehyde moiety such as (Z)-9-octadecenal are potential ligands for cluster of differentiation 36 (CD36), a transmembrane receptor that has recently been shown to play a role in mammalian olfaction. In this study, by performing an assay using a peptide mimic of human CD36, we aimed to discover additional ligands for the receptor from volatiles containing a single aldehyde group commonly found in human foods. Straight-chain, saturated aliphatic aldehydes with 9-16 carbons exhibited CD36 ligand activities, albeit to varying degrees. Notably, the activities of tridecanal and tetradecanal were higher than that of oleic acid, the most potent ligand among the fatty acids tested. Among the aldehydes other than aliphatic aldehydes, only phenylacetaldehyde showed a weak activity. These findings make a contribution to our knowledge of recognition mechanisms for flavor volatiles in foods with an aldehyde group.

  9. Primary cerebello-pontine angle malignant melanoma : a case report.

    Directory of Open Access Journals (Sweden)

    Desai K

    2001-04-01

    Full Text Available A rare case of primary malignant melanoma in the cerebello-pontine angle, in a 17 year old girl is presented. The patient presented with one month history of headache, diplopia, facial asymmetry and ataxia. The computerised tomography (CT scan and magnetic resonance imaging (MRI revealed a large cerebello-pontine angle mass with features suggestive of a melanoma. The typical black coloured, solid and vascular melanoma was excised completely. Cerebello-pontine angle melanoma are extremely rare tumours with dismal long term outcome in majority of these cases.

  10. [Melanoma: from molecular studies to the treatment breakthrough].

    Science.gov (United States)

    Imianitov, E N

    2013-01-01

    Melanoma holds a leading position in the mortality from skin tumors. Standard treatment of metastatic melanoma allows tumor remission to be achieved only in a small subset of patients. Studies on melanoma molecular pathogenesis led to the identification of several causative genetic events and, consequently, to the development of novel targeted drugs. More than a half of melanomas contain amine acid substitutions in serine-threonine kinase BRAF. Clinical trials involving specific BRAF inhibitors--vemurafenib and dabrafenib--demonstrated high efficacy of these agents towards BRAF-mutated melanoma. MEK inhibitors may show activity against both BRAF--and NRAS-driven tumors. Mucosal and acral melanomas frequently contain mutation in KIT receptor and can be successfully treated by imatinib. There are novel therapeutic monoclonal antibodies targeted against immunosuppressive molecules CTLA4, PD-1 and PD-L1. In some instances these drugs allow to obtain exceptionally prolonged responses. Whole genome sequencing led to the identification of new melanoma genes, e.g. GRIN2A, TRRAP, PREX2, RAC1, STK19, PPP6C, etc. Molecular testing, especially BRAF mutation analysis, has become a mandatory part of melanoma diagnosis. Nevertheless, despite the revolution in melanoma treatment, the prevention of excessive ultraviolet exposure, cancer awareness and early diagnosis remain the main tools for the management of this disease.

  11. Metastatic melanoma mimicking solitary fibrous tumor: report of two cases.

    Science.gov (United States)

    Bekers, Elise M; van Engen-van Grunsven, Adriana C H; Groenen, Patricia J T A; Westdorp, Harm; Koornstra, Rutger H T; Bonenkamp, Johannes J; Flucke, Uta; Blokx, Willeke A M

    2014-02-01

    Malignant melanomas are known for their remarkable morphological variation and aberrant immunophenotype with loss of lineage-specific markers, especially in recurrences and metastases. Hot spot mutations in BRAF, NRAS, GNAQ, and GNA11 and mutations in KIT are oncogenic events in melanomas. Therefore, genotyping can be a useful ancillary diagnostic tool. We present one case each of recurrent and metastatic melanoma, both showing histological and immunohistochemical features of solitary fibrous tumor (SFT). Mutational analysis detected BRAF and NRAS mutations in the primary and secondary lesions, respectively. This result confirmed the diagnosis of recurrent/metastastic melanoma.

  12. Prognosis of thin cutaneous head and neck melanoma (

    DEFF Research Database (Denmark)

    Andersson, A P; Dahlstrøm, Karin Kjærgaard; Drzewiecki, K T

    1996-01-01

    Thin malignant melanomas, i.e. tumours less than 1 mm, are generally considered to have a good prognosis. The records of 148 patients with thin invasive melanomas located to the head and neck region were reviewed. All patients were followed for the excision of the primary tumour until death...... of these 16 patients (75%) died of disseminated melanoma. We conclude that thin head and neck melanomas do not necessarily carry an excellent prognosis. Prognosis is not dependent upon tumour thickness when less than 1.00 mm....

  13. Expression of PIWIL3 in primary and metastatic melanoma.

    Science.gov (United States)

    Gambichler, Thilo; Kohsik, Christina; Höh, Ann-Kathrin; Lang, Kerstin; Käfferlein, Heiko U; Brüning, Thomas; Stockfleth, Eggert; Stücker, Markus; Dreißigacker, Max; Sand, Michael

    2017-03-01

    The PIWI-interacting RNA machinery in malignant melanoma (MM) has not been sufficiently studied. We aimed to investigate the PIWIL3 expression profiles in primary melanomas and metastases of MM including a correlation with clinical data. We studied 161 primary melanomas, 45 lymph node metastases, and 16 distant metastases of 183 patients with MM. We used immunohistochemistry to assess PIWIL3 protein expression in situ. The relationship between the immunoreactivity of PIWIL3 and clinical data was statistically evaluated. We observed a significantly (P = 0.000059) higher median immunoreactivity score in primary melanomas (4.9; range, 0.1-6), lymph node metastases (5.1; range, 3.3-6), and distant metastases (5.6; range, 4.5-6). PIWIL3 was expressed significantly higher (P = 0.0002) in primary nodular melanomas and acral melanomas (5.2; range, 3.4-6) when compared to other melanoma subtypes (4.7; range, 0.1-6). On univariate analysis, a significant positive correlation was observed between primary melanoma PIWIL3 expression and tumor thickness (r = 0.2; P = 0.014). On univariate and multivariate analysis, PIWIL3 did not prove to be an independent predictor for melanoma relapse or death. Our data indicate that PIWIL3 protein expression is elevated in more aggressive primary MM and metastatic disease. As also observed in other malignancies, PIWIL3 seems to play a role in MM progression.

  14. Histopathological diagnosis of acral lentiginous melanoma in early stages.

    Science.gov (United States)

    Fernandez-Flores, Angel; Cassarino, David S

    2017-02-01

    Acral lentiginous melanoma is a rare variant of melanoma that is associated with a relatively low survival rate. The latter is partly due to the advanced stage in which the tumor is usually diagnosed. The diagnostic delay is mainly due to difficulties in identifying the very early histopathological signs of acral melanoma. The current article is a review of diagnostic clues, concepts, and definitions from the literature, as well as illustrating examples from our own archives. We have sought to provide an article that can be easily consulted in difficult cases of acral lentiginous melanoma.

  15. Identification of donor melanoma in a renal transplant recipient.

    Science.gov (United States)

    Wilson, L J; Horvat, R T; Tilzer, L; Meis, A M; Montag, L; Huntrakoon, M

    1992-12-01

    A patient with chronic renal failure received a closely matched cadaveric kidney. Approximately 3 months after transplantation, the patient developed a metastatic malignant melanoma. A large retroperitoneal mass consisting of large pleomorphic polygonal neoplastic cells was found close to the donated kidney. This tumor was diagnosed as a malignant melanoma. DNA analysis of this tumor, the donated kidney, and the recipient indicated that the melanoma originated from the donor. Although this is not the first report of a donated melanoma, it is the first report of definitive DNA analysis of the origin of the malignant cells.

  16. Molecular biology of normal melanocytes and melanoma cells.

    Science.gov (United States)

    Bandarchi, Bizhan; Jabbari, Cyrus Aleksandre; Vedadi, Ali; Navab, Roya

    2013-08-01

    Malignant melanoma is one of the most aggressive malignancies in humans and is responsible for 60-80% of deaths from skin cancers. The 5-year survival of patients with metastatic malignant melanoma is about 14%. Its incidence has been increasing in the white population over the past two decades. The mechanisms leading to malignant transformation of melanocytes and melanocytic lesions are poorly understood. In developing malignant melanoma, there is a complex interaction of environmental and endogenous (genetic) factors, including: dysregulation of cell proliferation, programmed cell death (apoptosis) and cell-to-cell interactions. The understanding of genetic alterations in signalling pathways of primary and metastatic malignant melanoma and their interactions may lead to therapeutics modalities, including targeted therapies, particularly in advanced melanomas that have high mortality rates and are often resistant to chemotherapy and radiotherapy. Our knowledge regarding the molecular biology of malignant melanoma has been expanding. Even though several genes involved in melanocyte development may also be associated with melanoma cell development, it is still unclear how a normal melanocyte becomes a melanoma cell. This article reviews the molecular events and recent findings associated with malignant melanoma.

  17. Prognosis of thin cutaneous head and neck melanoma (

    DEFF Research Database (Denmark)

    Andersson, A P; Dahlstrøm, Karin Kjærgaard; Drzewiecki, K T

    1996-01-01

    Thin malignant melanomas, i.e. tumours less than 1 mm, are generally considered to have a good prognosis. The records of 148 patients with thin invasive melanomas located to the head and neck region were reviewed. All patients were followed for the excision of the primary tumour until death...... of these 16 patients (75%) died of disseminated melanoma. We conclude that thin head and neck melanomas do not necessarily carry an excellent prognosis. Prognosis is not dependent upon tumour thickness when less than 1.00 mm....

  18. Multiple cutaneous melanomas associated with gastric and brain metastases*

    Science.gov (United States)

    Grander, Lara Caroline; Cabral, Fernanda; Lisboa, Alice Paixão; Vale, Gabrielle; Barcaui, Carlos Baptista; Maceira, Juan Manuel Pineiro

    2016-01-01

    The occurrence of multiple primary melanomas in a single individual is rare. Most commonly, malignant melanocytic lesions subsequent to the initial diagnosis of melanoma are secondary cutaneous metastases. We report a patient with gastrointestinal bleeding from gastric metastasis of cutaneous melanoma. During clinical evaluation and staging, we discovered a brain metastasis associated with 3 synchronous primary cutaneous melanomas. We suggest the research on the mutation in the cyclin-dependent kinase inhibitor 2A (CDKN2A) (INK4a) in such cases. We also emphasize the importance of clinical examination and dermoscopy of the entire tegument, even after a malignant melanocytic lesion is identified.

  19. Dendritic cells in melanoma - immunohistochemical study and research trends.

    Science.gov (United States)

    Nedelcu, Roxana Ioana; Ion, Daniela Adriana; Holeab, Cosmin Adrian; Cioplea, Mirela Daniela; Brînzea, Alice; Zurac, Sabina Andrada

    2015-01-01

    Cutaneous dendritic cells play multiple physiological roles and are involved in various pathophysiological processes. Research studies of dendritic cells abound in the medical literature. Nevertheless, the role of dendritic cells in melanoma regression phenomenon is not completely understood. We conducted a scientometric analysis in order to highlight the current state on research regarding dendritic cells and melanoma. We also performed an immunohistochemical study, using specific markers for dendritic cells (CD1a, langerin). We evaluated the frequency and distribution of dendritic cells in areas of tumor regression compared to the areas of inflammatory infiltrate of melanoma without regression. The immunohistochemical study we performed revealed that dendritic cells are more frequent in the regressed areas, comparing with non-regressed ones. In regressed areas, dendritic cells have a predominant nodular pattern (19 cases), followed by diffuse isolate pattern (eight cases) and mixed pattern (diffuse and nodular) (three cases). In melanoma without regression, most cases presented a diffuse pattern (27 cases) of dendritic cells distribution. In conclusion, our immunohistochemical study stressed differences between frequency and distribution of dendritic cells located in the melanoma with regression and melanoma without regression. These data suggest that dendritic cells are involved in the regression phenomenon. Following the literature analysis we obtained, we observed that dendritic cells profile in melanoma with regression was poorly studied. Insights into antitumor immune response and dendritic cells may be essential for the understanding of the potential prognostic role of dendritic cells in melanoma and for the development of new promising therapeutic strategies for melanoma.

  20. Lessons from Cancer Immunoediting in Cutaneous Melanoma

    Directory of Open Access Journals (Sweden)

    Mariana Aris

    2012-01-01

    Full Text Available We will revisit the dual role of the immune system in controlling and enabling tumor progression, known as cancer immunoediting. We will go through the different phases of this phenomenon, exposing the most relevant evidences obtained from experimental models and human clinical data, with special focus on Cutaneous Melanoma, an immunogenic tumor per excellence. We will describe the different immunotherapeutic strategies employed and consider current models accounting for tumor heterogeneity. And finally, we will propose a rational discussion of the progress made and the future challenges in the therapeutics of Cutaneous Melanoma, taking into consideration that tumor evolution is the resulting from a continuous feedback between tumor cells and their environment, and that different combinatorial therapeutic approaches can be implemented according to the tumor stage.