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Sample records for adiponectin

  1. Adiponectin in childhood.

    Jeffery, Alison N; Murphy, Michael J; Metcalf, Brad S; Hosking, Joanne; Voss, Linda D; English, Patrick; Sattar, Naveed; Wilkin, Terence J

    2008-01-01

    Adiponectin, a hormone produced and secreted by adipocytes, is present in circulation in high circulating concentrations, suggesting an important physiological role. An indirect regulator of glucose metabolism, adiponectin increases insulin sensitivity, improves glucose tolerance and inhibits inflammation. Plasma adiponectin relates inversely to adiposity and, importantly, reflects the sequelae of accumulation of excess adiposity. The role of adiponectin in adults has been explored in detail. Studies in children are now available and, given the increasing rates of childhood obesity, it is important to establish the role of adiponectin in mediating insulin resistance and cardiovascular disease in this age group. This paper reviews the regulation of adiponectin, its effect on body mass, glucose metabolism and cardiovascular risk in infants, children and adolescents. It demonstrates clear links between adiponectin and features of the metabolic syndrome in obese children and adolescents. However, adiponectin's role as a predictor of metabolic dysfunction in healthy, normal-weight youngsters is less clear. PMID:19086185

  2. Adiponectin in atherosclerosis

    Persson, Jonas

    2012-01-01

    Adiponectin is a protein secreted from adipocytes, circulating at high levels in plasma (3 30μg/mL), and in overweight subjects it is down regulated. Adiponectin inhibits the development of atherosclerosis in experimental animal models but whether adiponectin is anti atherogenic in humans is not known. Furthermore, epidemiological studies on plasma adiponectin with regard to cardiovascular outcome are contradictory. We therefore explored the relationship between pla...

  3. Linking adiponectin to proteinuria

    Ahima, Rexford S.

    2008-01-01

    Obesity predisposes toward renal disease independently of diabetes and hypertension. In this issue of the JCI, Sharma and colleagues assessed the role of adiponectin, an adipose-derived hormone, in the pathogenesis of albuminuria (see the related article beginning on page 1645). Obese African Americans had reduced adiponectin levels associated with albuminuria. Adiponectin deficiency in mice induced oxidative stress, fusion of podocyte foot processes in the kidney glomerulus, and urinary albu...

  4. Cardiometabolic effects of adiponectin

    Parker-Duffen, Jennifer L.; Walsh, Kenneth

    2013-01-01

    Over the past two decades, adiponectin has been studied in more than eleven thousand publications. A classical adipokine, adiponectin was among the first factors secreted from adipose tissue that were found to promote metabolic function. Circulating levels of adiponectin consistently decline with increasing body mass index. Clinical and basic science studies have identified adiponectin’s cardiovascular-protective actions, providing a mechanistic link to the increased incidence of cardiovascul...

  5. Review: adiponectin in retinopathy.

    Fu, Zhongjie; Gong, Yan; Löfqvist, Chatarina; Hellström, Ann; Smith, Lois E H

    2016-08-01

    Neovascular eye diseases are a major cause of blindness including retinopathy of prematurity, diabetic retinopathy and age-related macular degeneration in which new vessel formation is driven by hypoxia or metabolic abnormalities affecting the fuel supply. White-adipose-tissue derived adipokines such as adiponectin modulate metabolic responses. Increasing evidence shows that lack of adiponectin may result in retinal neovascularization. Activation of the adiponectin pathway may in turn restore energy metabolism, to suppress the drive for compensatory but ultimately pathological neovessels of retinopathy. In this review, we will summarize our current knowledge of the role of adiponectin in eye diseases of premature infants, diabetic patients as well as the elderly. Further investigations in this field are likely to lead to new preventative approaches for these diseases. PMID:27155572

  6. Adiponectin protects rat hippocampal neurons against excitotoxicity

    Qiu, Guang; Wan, Ruiqian; Hu, Jingping; Mattson, Mark P.; Spangler, Edward; Liu, Shan; Yau, Suk-yu; Lee, Tatia M. C.; Gleichmann, Marc; Ingram, Donald K.; So, Kwok-Fai; Zou, Sige

    2010-01-01

    Adiponectin exerts multiple regulatory functions in the body and in the hypothalamus primarily through activation of its two receptors, adiponectin receptor1 and adiponectin receptor 2. Recent studies have shown that adiponectin receptors are widely expressed in other areas of the brain including the hippocampus. However, the functions of adiponectin in brain regions other than the hypothalamus are not clear. Here, we report that adiponectin can protect cultured hippocampal neurons against ka...

  7. Adiponectin effects on the kidney

    Sweiss, Natalie; Sharma, Kumar

    2013-01-01

    Adiponectin is a 30-kDa polypeptide secreted primarily by adipose tissue and plays a key role in kidney disease. In obesity, reduced adiponectin levels are associated with insulin resistance, cardiovascular disease and obesity related kidney disease. The latter includes microalbuminuria, glomerulomegaly, overt proteinuria and focal segmental glomerulosclerosis. Adiponectin levels in type 2 diabetics also negatively correlate with early features of nephropathy. However, in patients with establ...

  8. Adiponectin, Leptin, and Yoga Practice

    Kiecolt-Glaser, Janice K.; Christian, Lisa M.; Andridge, Rebecca; Hwang, Beom Seuk; Malarkey, William B.; Belury, Martha A.; Emery, Charles F.; Glaser, Ronald

    2012-01-01

    To address the mechanisms underlying hatha yoga’s potential stress-reduction benefits, we compared adiponectin and leptin data from well-matched novice and expert yoga practitioners. These adipocytokines have counter-regulatory functions in inflammation; leptin plays a proinflammatory role, while adiponectin has anti-inflammatory properties. Fifty healthy women (mean age=41.32, range=30-65), 25 novices and 25 experts, provided fasting blood samples during three separate visits. Leptin was 36%...

  9. Adiponectin as an anti-inflammatory factor

    Ouchi, Noriyuki; Walsh, Kenneth

    2007-01-01

    Obesity is characterized by low-grade systemic inflammation. Adiponectin is an adipose tissue-derived hormone, which is downregulated in obesity. Adiponectin displays protective actions on the development of various obesity-linked diseases. Several clinical studies demonstrate the inverse relationship between plasma adiponectin levels and several inflammatory markers including C-reactive protein. Adiponectin attenuates inflammatory responses to multiple stimuli by modulating signaling pathway...

  10. Globular adiponectin, acting via adiponectin receptor-1, inhibits leptin-stimulated oesophageal adenocarcinoma cell proliferation

    Ogunwobi, Olorunseun O.; Beales, Ian L.P.

    2008-01-01

    Globular adiponectin, acting via adiponectin receptor-1, inhibits leptin-stimulated oesophageal adenocarcinoma cell proliferation UNITED KINGDOM (Ogunwobi, Olorunseun O.) UNITED KINGDOM Received: 2007-09-18 Revised: 2008-01-14 Accepted: 2008-01-23

  11. Association of adiponectin gene polymorphism with adiponectin levels and risk for insulin resistance syndrome

    Jai Prakash; Balraj Mittal; Shally Awasthi; Neena Srivastava

    2015-01-01

    Background: Adiponectin is an abundant adipose tissue-derived protein with anti-atherogenic, anti-inflammatory and antidiabetic properties. Plasma adiponectin levels are decreased in obesity, type 2 diabetes, and coronary artery disease and low adiponectin levels also predict insulin resistance (IR). Methods: Case-control study in which 642 male and female subjects were participated from the North Indian population. Lipid, insulin, leptin and adiponectin level were estimated using standar...

  12. Adiponectin, type 2 diabetes and cardiovascular risk

    Lindberg, Søren; Jensen, Jan Skov; Bjerre, Mette;

    2015-01-01

    BACKGROUND: Adiponectin is viewed as an insulin-sensitizing hormone with anti-inflammatory effects. In accordance, plasma adiponectin is decreased in metabolic disorders including type 2 diabetes mellitus (T2DM). However, in spite of the apparently beneficially effects, recent data from large...... prospective studies have consistently linked high adiponectin levels with increased cardiovascular (CV) disease and mortality, thus questioning the positive view on adiponectin. Accordingly, we investigated the relationship between adiponectin, incident T2DM and subsequently CV events. METHODS: We...... prospectively followed 5349 randomly selected men and women from the community, without T2DM or CV disease. Plasma adiponectin was measured at study entry. Median follow-up time was 8.5 years (IQR 8.0-9.1 years). During follow up, 136 participants developed T2DM. Following their diagnosis, 36 of the 136...

  13. Specific dietary patterns and concentrations of adiponectin

    Vajihe Izadi; Leila Azadbakht

    2015-01-01

    Background: One of the adipokines mostly secreted from adipose tissue is adiponectin. Adiponectin is well known as the anti-diabetic, anti-obesity and cardio-protective factor. Present study focused on the review the previous studies about relationship between adherence to healthy dietary pattern, independent of one or two special dietary components, and concentration of adiponectin. Materials and Methods: We searched in PubMed search engine from 2003 to July 2014 using the following key word...

  14. Adiponectin Protein Exists in Aortic Endothelial Cells

    Noriyuki Komura; Norikazu Maeda; Takuya Mori; Shinji Kihara; Hideaki Nakatsuji; Ayumu Hirata; Yoshihiro Tochino; Tohru Funahashi; Iichiro Shimomura

    2013-01-01

    AIMS: Inflammation is closely associated with the development of atherosclerosis and metabolic syndrome. Adiponectin, an adipose-derived secretory protein, possesses an anti-atherosclerotic property. The present study was undertaken to elucidate the presence and significance of adiponectin in vasculature. METHODS AND RESULTS: Immunofluorescence staining was performed in aorta of wild-type (WT) mice and demonstrated that adiponectin was co-stained with CD31. Thoracic aorta was cut through and ...

  15. Adiponectin Actions in the Cardiovascular System

    Hopkins, Teresa A.; Ouchi, Noriyuki; Shibata, Rei; Walsh, Kenneth

    2006-01-01

    Obesity is strongly associated with the pathogenesis of type 2 diabetes, hypertension, and cardiovascular disease. Levels of the hormone adiponectin are downregulated in obese individuals, and several experimental studies show that adiponectin protects against the development of various obesity-related metabolic and cardiovascular diseases. Adiponectin exhibits favorable effects on atherogenesis, endothelial function, and vascular remodeling by modulation of signaling cascades in cells of the...

  16. Adiponectin Inhibits Lipolysis in Mouse Adipocytes

    Qiao, Liping; Kinney, Brice; Schaack, Jerome; Shao, Jianhua

    2011-01-01

    OBJECTIVE Adiponectin is an adipocyte-derived hormone that sensitizes insulin and improves energy metabolism in tissues. This study was designed to investigate the direct regulatory effects of adiponectin on lipid metabolism in adipocytes. RESEARCH DESIGN AND METHODS Basal and hormone-stimulated lipolysis were comparatively analyzed using white adipose tissues or primary adipocytes from adiponectin gene knockout and control mice. To further study the underlying mechanisms through which adipon...

  17. Serum Adiponectin in Women with Gestational Diabetes

    2014-01-01

    Background &Objective: Adiponectin is an adipose tissue adipokin that may contribute to obesity and insulin resistantance. The aim of this study was to evaluate the associations between serum concentrations of adiponectin and insulin resistance in gestational diabetes (GDM).Materials & Methods: Serum adiponectin levels, fasting blood sugar (FBS), glycated hemoglobin (HbA1C), insulin levels and blood lipids were measured in 66 women with GDM and 70 pregnant women without GDM. The associations ...

  18. Regulation of Adiponectin Multimerization, Signaling and Function

    Liu, Meilian; Liu, Feng

    2013-01-01

    Adiponectin, which exists in serum in three major complexes including trimer, hexamer, and the high molecular weight (HMW) form, has strong insulin sensitizing, antiinflammatory and anti-diabetic functions. Different adiponectin complexes exert tissue-specific biological functions and activate distinct signaling pathways. In this review, we summarize our current understanding on the mechanisms regulating adiponectin multimerization. We also describe the major target tissues in which distinct ...

  19. Energy intake and adiponectin gene expression

    Qiao, Liping; Lee, Bonggi; Kinney, Brice; Yoo, Hyung sun; Shao, Jianhua

    2011-01-01

    Hypoadiponectinemia and decreased adiponectin gene expression in white adipose tissue (WAT) have been well observed in obese subjects and animal models. However, the mechanism for obesity-associated hypoadiponectinemia is still largely unknown. To investigate the regulatory role of energy intake, dietary fat, and adiposity in adiponectin gene expression and blood adiponectin level, a series of feeding regimens was employed to manipulate energy intake and dietary fat in obese-prone C57BL/6, ge...

  20. Relationship between adiponectin and type 2 diabetes

    In order to study the effect of plasma adiponectin on type 2 diabetes patients, the correlation between plasma adiponectin, serum glucose, insulin and plasma lipid of the patients with type 2 diabetes was analyzed. 32 subjects with normal glucose, 105 with type 2 diabetes, including 53 subjects without obesity (BMI2) and 52 with obesity (BMI≥25kg/m2) were involved into this study. The fasting plasma adiponectin, serum glucose, insulin and plasma lipid were measured by RIA. The results showed that the mean plasma adiponectin in normal, non-obesity and obesity group was 9.46±0.89 mg/L, 5.83±1.06mg/L and 3.17± 0.56mg/L, respectively. The plasma adiponectin levels in the type 2 diabetes group were significantly lower than that in normal group (P<0.05), especially in obesity group. The adiponectin level was significantly correlated with serum glucose and triglyceride, r value was -0.59 and -0.76, respectively. Adiponectin may be a kind of protective factor. It takes part in the pathogenesis of type 2 diabetes, and is close correlated with insulin resistance. The plasma adiponectin might be an effective index in the early diagnosis, prevention and treatment of type 2 diabetes. (authors)

  1. Association between Risk Factors for Vascular Dementia and Adiponectin

    Juhyun Song; Won Taek Lee; Kyung Ah Park; Jong Eun Lee

    2014-01-01

    Vascular dementia is caused by various factors, including increased age, diabetes, hypertension, atherosclerosis, and stroke. Adiponectin is an adipokine secreted by adipose tissue. Adiponectin is widely known as a regulating factor related to cardiovascular disease and diabetes. Adiponectin plasma levels decrease with age. Decreased adiponectin increases the risk of cardiovascular disease and diabetes. Adiponectin improves hypertension and atherosclerosis by acting as a vasodilator and antia...

  2. Relationship between adiponectin, obesity and insulin resistance

    Guilherme Ardenghi Balsan

    2015-02-01

    Full Text Available Objectives: the conditions of obesity and overweight pose a major risk for a number of comorbidities, including clinical syndromes resulting from atherosclerotic disease. Recent studies strongly indicate that adipose tissue is an active endocrine organ that secretes bioactive factors such as adipokines. Adiponectin appears to have a regulatory role in the mechanism of insulin resistance and in the development of atherosclerosis. This systematic review aims to evaluate the anti-atherogenic effects of adiponectin and its properties to improve and mimic metabolic and vascular actions of insulin and its influence on endothelial function. Methods: a qualitative, exploratory and literature review was performed in the PubMed, Portal Capes and Scielo databases using as key-words "adiponectin", "obesity", "insulin resistance", "anti-inflammatory", "therapeutic strategies" and "future prospects". Results: evidence suggests that adiponectin has anti-atherogenic properties with anti-inflammatory effects on the vascular wall. Moreover, it modifies the vascular intracellular signaling and has indirect antioxidant effects on the human myocardium. On the other hand, there are studies suggesting that increased levels of adiponectin are paradoxically associated with a worse prognosis in heart failure syndrome, although the mechanisms are not clear. Conclusion: it is not clear whether adiponectin levels have any clinical significance for risk stratification in cardiovascular disease or if they simply reflect the activation of complex underlying mechanisms. Changes in lifestyle and some drug treatments for hypertension and coronary heart disease have shown significant effect to increase adiponectin levels, and simultaneously decrease in insulin resistance and endothelial dysfunction.

  3. Adiponectin multimers in patients with Barrett's Oesophagus

    Mohammed Fakhraldeen*, Huseen Saad Mostafa**, Ghada Ali Abdulwahab

    2010-06-01

    Full Text Available Barrett's oesophagus is associated with abdominal obesity. Adiponectin is a peptide that is secreted from adipocytes and circulates in three multimeric forms: low molecular weight (LMW, middle molecular weight (MMW, and high molecular weight (HMW. The anti-inflammatory effects of adiponectin are specific to individual multimers, with the LMW being most anti-inflammatory. We investigated the possibility that circulating levels of adiponectin and its multimers would be associated with the risk of Barrett's oesophagus. Subjects and methods This study comprised patients diagnosed to have Barrett's oesophagus, and control subjects diagnosed to have gastrooesophageal reflux disease (GORD, all were diagnosed in the gastroenterology and endoscopy unit, King Fahd hospital, Riyadh, Saudi Arabia. Plasma adiponectin levels and its multimers were evaluated for patients with Barrett's oesophagus and controls with GORD. Results There were 120 cases of Barrett's oesophagus and 250 GORD controls. Total adiponectin was not significantly associated with Barrett's oesophagus; low levels of LMW adiponectin and low LMW/total ratio were significantly present in patients with Barrett's oesophagus. Conclusion Low levels of LMW adiponectin are significantly associated with Barrett's oesophagus.

  4. Maternal serum levels of adiponectin in preeclampsia

    The results of the serum levels of adiponectin in pre eclamptic patients are conflicting. Objective: The aim of the present study was to assess serum levels of adiponectin in women with pre eclampsia compared with healthy pregnant women. Methods: A cross-sectional study was designed. The case group consisted of women with pre eclampsia (n=30). The control group consisted of 30 matched normal pregnant women. Serum levels of adiponectin were assessed using enzyme-linked immunosorbent assay method. Results: Serum levels of adiponectin were significantly higher in the pre eclamptic group than those in the normal control group. In the pre eclamptic patients serum levels of adiponectin showed a significant negative correlation with body mass index while no correlation was found in the normal pregnant women. In women with pre eclampsia, levels of adiponectin were decreased significantly in the overweight women compared with normal weight women, while in the control group no significant difference was observed. Conclusion: In conclusion, elevation of adiponectin levels might be a physiological feedback response to minimize endothelial dysfunction in pre eclamptic patients. (author)

  5. Relationships of Total Adiponectin and Molecular Weight Fractions of Adiponectin with Free Testosterone in African Men and Premenopausal Women

    Cui, Jie; Wu, Xiangdong; Andrel, Jocelyn; Falkner, Bonita

    2010-01-01

    Adiponectin, a protein secreted by adipose tissue, has anti-inflammatory, anti-thrombogenic and anti-diabetogenic properties. Lower plasma adiponectin levels are present in diabetes, obesity, and metabolic syndrome. Adiponectin levels are higher in women compared to men. The purpose of this study was to determine if there are relationships between total adiponectin, or the molecular weight fractions of adiponectin, with testosterone levels in African American men and pre-menopausal women. A s...

  6. Adiponectin and adiponectin receptors in insulin resistance, diabetes, and the metabolic syndrome

    Kadowaki, Takashi; Yamauchi, Toshimasa; KUBOTA, Naoto; Hara, Kazuo; Ueki, Kohjiro; Tobe, Kazuyuki

    2006-01-01

    Adiponectin is an adipokine that is specifically and abundantly expressed in adipose tissue and directly sensitizes the body to insulin. Hypoadiponectinemia, caused by interactions of genetic factors such as SNPs in the Adiponectin gene and environmental factors causing obesity, appears to play an important causal role in insulin resistance, type 2 diabetes, and the metabolic syndrome, which are linked to obesity. The adiponectin receptors, AdipoR1 and AdipoR2, which mediate the antidiabetic ...

  7. Specific dietary patterns and concentrations of adiponectin

    Vajihe Izadi

    2015-01-01

    Full Text Available Background: One of the adipokines mostly secreted from adipose tissue is adiponectin. Adiponectin is well known as the anti-diabetic, anti-obesity and cardio-protective factor. Present study focused on the review the previous studies about relationship between adherence to healthy dietary pattern, independent of one or two special dietary components, and concentration of adiponectin. Materials and Methods: We searched in PubMed search engine from 2003 to July 2014 using the following key words: Healthy dietary pattern, mediterranean dietary pattern, dietary pattern, diet intervention and adiponectin and adipokines. Then, we recruited 10 articles to review in the present study. Results: Cohort studies that are examined this relationship among women showed the strong positive association in this regard. According to cross-sectional studies adherence to healthy dietary pattern like Mediterranian intervention with moderate weight loss had a positive association with concentration of adiponectin. Conclusion: It seems that adherents to the healthy dietary patterns have great levels of circulating adiponectin. However, it is not clear that whether the separate components of healthy dietary patterns like good sources of fats or protein or fibers mostly have important roles in these beneficial effects of such dietary patterns or not.

  8. Association between circulating adiponectin levels and polycystic ovarian syndrome

    Mirza, Saira Saeed; Shafique, Kashif; Shaikh, Abdul Rauf; Khan, Naveed Ali; Anwar Qureshi, Masood

    2014-01-01

    Background: Low adiponectin levels in polycystic ovarian syndrome (PCOS) have been largely attributed to obesity which is common among these patients. In addition, evidence also suggests that low adiponectin in PCOS may be related to insulin resistance (IR) in these women. However, studies on the role of adiponectin in younger and lean patients are limited. Therefore, the aim of the present study was to examine the association of adiponectin levels in young and lean women with PCOS. Me...

  9. Adiponectin Upregulates Ferritin Heavy Chain in Skeletal Muscle Cells

    Ikegami, Yuichi; Inukai, Kouichi; Imai, Kenta; Sakamoto, Yasushi; Katagiri, Hideki; Kurihara, Susumu; Awata, Takuya; Katayama, Shigehiro

    2009-01-01

    OBJECTIVE—Adiponectin is an adipocyte-derived protein that acts to reduce insulin resistance in the liver and muscle and also inhibits atherosclerosis. Although adiponectin reportedly enhances AMP-activated protein kinase and inhibits tumor necrosis factor-α action downstream from the adiponectin signal, the precise physiological mechanisms by which adiponectin acts on skeletal muscles remain unknown. RESEARCH DESIGN AND METHODS—We treated murine primary skeletal muscle cells with recombinant...

  10. Adiponectin as a Biomarker of Osteoporosis in Postmenopausal Women: Controversies

    Anna Lubkowska; Aleksandra Dobek; Jan Mieszkowski; Wojciech Garczynski; Dariusz Chlubek

    2014-01-01

    The literature reports indicating a link between plasma levels of adiponectin and body fat, bone mineral density, sex hormones, and peri- and postmenopausal changes, draw attention to the possible use of adiponectin as an indicator of osteoporotic changes, suggesting that adiponectin may also modulate bone metabolism. In this study, we attempted to analyze the available in vitro and in vivo results which could verify this hypothesis. Although several studies have shown that adiponectin has an...

  11. Adiponectin promotes endothelial progenitor cell number and function

    Shibata, Rei; Skurk, Carsten; Ouchi, Noriyuki; Galasso, Gennaro; Kondo, Kazuhisa; Ohashi, Taiki; Shimano, Masayuki; Kihara, Shinji; Murohara, Toyoaki; Walsh, Kenneth

    2008-01-01

    Obesity-linked diseases are associated with suppressed endothelial progenitor cell (EPC) function. Adiponectin is an adipose-derived protein that is downregulated in obese and diabetic subjects. Here, we investigated the effects of adiponectin on EPCs. EPC levels did not increase in adiponectin deficient (APN-KO) in response to hindlimb ischemia. Adenovirus-mediated delivery of adiponectin increased EPC levels in both WT and APN-KO mice. Incubation of human peripheral blood mononuclear cells ...

  12. Genetic deficiency of adiponectin protects against acute kidney injury

    Jin, Xiaogao; Chen, Jiyuan; Hu, Zhaoyong; Chan, Lawrence; Wang, Yanlin

    2013-01-01

    Adiponectin is a multifunctional cytokine that has a role in regulating inflammation. Here we determined if adiponectin modulates ischemic acute kidney injury. Compared with wild-type mice, adiponectin knockout mice were found to have lower serum creatinine and less tubular damage or apoptosis following ischemia/reperfusion injury. This latter process was associated with decreased Bax and reduced activation of p53 and caspase-3. Targeted disruption of adiponectin was also found to inhibit the...

  13. Adiponectin and chronic kidney disease; a review on recent findings

    Heidari Maryam; Nasri Parto; Nasri Hamid

    2015-01-01

    Adiponectin is a multifunctional cytokine that has a role in regulating inflammation. In patients without chronic renal failure (CRF) and type 2 diabetics, decreased adiponectin levels are associated with insulin resistance. Lower serum plasma adiponectin values are link to larger tumor size and metastasis in clear-cell carcinoma of the kidney too. However, in patients with established chronic kidney disease (CKD), adiponectin levels are elevated and positively predict progression of disease....

  14. Low Serum Adiponectin Predicts Future Risk for Asthma in Women

    Sood, Akshay; Qualls, Clifford; Schuyler, Mark; Thyagarajan, Bharat; Steffes, Michael W.; Smith, Lewis J.; Jacobs, David R.

    2012-01-01

    Rationale: Our previous cross-sectional study showed that serum adiponectin is inversely associated with asthma among women. However, it is not known if serum adiponectin predicts future development of asthma or if asthma affects subsequent serum adiponectin concentrations among women.

  15. Adiponectin and plant-derived mammalian adiponectin homolog exert a protective effect in murine colitis

    Arsenescu, Violeta

    2011-04-11

    Background: Hypoadiponectinemia has been associated with states of chronic inflammation in humans. Mesenteric fat hypertrophy and low adiponectin have been described in patients with Crohn\\'s disease. We investigated whether adiponectin and the plant-derived homolog, osmotin, are beneficial in a murine model of colitis. Methods: C57BL/6 mice were injected (i.v.) with an adenoviral construct encoding the full-length murine adiponectin gene (AN+DSS) or a reporter-LacZ (Ctr and V+DSS groups) prior to DSS colitis protocol. In another experiment, mice with DSS colitis received either osmotin (Osm+DSS) or saline (DSS) via osmotic pumps. Disease progression and severity were evaluated using body weight, stool consistency, rectal bleeding, colon lengths, and histology. In vitro experiments were carried out in bone marrow-derived dendritic cells. Results: Mice overexpressing adiponectin had lower expression of proinflammatory cytokines (TNF, IL-1β), adipokines (angiotensin, osteopontin), and cellular stress and apoptosis markers. These mice had higher levels of IL-10, alternative macrophage marker, arginase 1, and leukoprotease inhibitor. The plant adiponectin homolog osmotin similarly improved colitis outcome and induced robust IL-10 secretion. LPS induced a state of adiponectin resistance in dendritic cells that was reversed by treatment with PPARγ agonist and retinoic acid. Conclusion: Adiponectin exerted protective effects during murine DSS colitis. It had a broad activity that encompassed cytokines, chemotactic factors as well as processes that assure cell viability during stressful conditions. Reducing adiponectin resistance or using plant-derived adiponectin homologs may become therapeutic options in inflammatory bowel disease. © 2011 Springer Science+Business Media, LLC.

  16. Plasma adiponectin before and after kidney transplantation

    Idorn, Thomas; Hornum, Mads; Bjerre, Mette;

    2012-01-01

    The role of plasma adiponectin (ADPN) in patients with impaired kidney function and following kidney transplantation (Tx) is debated. We aimed to: (i) determine whether pretransplant ADPN level is an independent risk factor for deterioration of glucose tolerance including development of new...

  17. Influence of serum adiponectin level and SNP +45 polymorphism of adiponectin gene on myocardial fibrosis

    Cheng-jun YAN; Su-mei LI; Qiang XIAO; Yan LIU; Jian HOU; Ai-fang CHEN; Li-ping XIA

    2013-01-01

    Adiponectin plays an important role in the development of hypertension,atherosclerosis,and cardiomyocyte hypertrophy,but very little was known about the influence of serum adiponectin or the adiponectin gene polymorphism on myocardial fibrosis.Our study investigates the influence of the SNP +45 polymorphism of the adiponectin gene and serum levels of adiponectin on myocardial fibrosis in patients with essential hypertension.A case-control study was conducted on 165 hypertensive patients and 126 normotensive healthy controls.The genotypes of adiponectin gene polymorphisms were detected by the polymerase chain reaction (PCR) method.Serum concentrations of procollagen were measured by a double antibody sandwich enzyme-linked immunosorbent assay (ELISA) in all subjects.The integrated backscatter score (IBS) was measured in the left ventricular myocardium using echocardiography.The serum levels of adiponectin in hypertensive patients were significantly lower than those in the normal control group ((2.69±1.0) lμg/ml vs.(4.21±2.89) lμg/ml,respectively,P<0.001).The serum levels of type-(Ⅰ)procollagen carboxyl end peptide (PICP) and type-Ⅲll procollagen ammonia cardinal extremity peptide (PⅢNP) in the hypertension group were significantly higher than those in the control group.In the hypertension group,serum levels of adiponectin were significantly and negatively related to the average acoustic intensity and corrected acoustic intensity of the myocardium (r=-0.46 and 0.61,respectively,P<0.05 for both).The serum levels of PICP and PⅢNP were significantly different among the three genotypes of SNP +45 (P<0.01).Logistic regression analyses showed that sex and genotype (GG+GT) were the major risk factors of myocardial fibrosis in hypertensive patients (OR=5.343 and 3.278,respectively,P<0.05).These data suggest that lower levels of adiponectin and SNP +45 polymorphism of the adiponectin gene are likely to play an important role in myocardial fibrosis in

  18. Association between multimeric adiponectin and free leptin index with atherogenic dyslipidemia in non-diabetic obese men

    Candra Ninghayu; Andi Wijaya; Suryani As’ad

    2011-01-01

    Background: To analyze the role of various adiponectin and free leptin index on the occurrence of atherogenic dislipidemia in non-diabetic central obese men.Methods: This is a cross-sectional study on 120 non-diabetic central obese men that was done in Jakarta. The measured indicators were total adiponectin, high molecular weight adiponectin (HMW adiponectin), medium molecular weight adiponectin (MMW adiponectin), low molecular weight adiponectin (LMW adiponectin), leptin, soluble leptin rece...

  19. Delayed liver regeneration after partial hepatectomy in adiponectin knockout mice

    We previously demonstrated that adiponectin has anti-fibrogenic and anti-inflammatory effects in the liver of mouse models of various liver diseases. However, its role in liver regeneration remains unclear. The aim of this study was to determine the role of adiponectin in liver regeneration. We assessed liver regeneration after partial hepatectomy in wild-type (WT) and adiponectin knockout (KO) mice. We analyzed DNA replication and various signaling pathways involved in cell proliferation and metabolism. Adiponectin KO mice exhibited delayed DNA replication and increased lipid accumulation in the regenerating liver. The expression levels of peroxisome proliferator-activated receptor (PPAR) α and carnitine palmitoyltransferase-1 (CPT-1), a key enzyme in mitochondrial fatty acid oxidation, were decreased in adiponectin KO mice, suggesting possible contribution of altered fat metabolism to these phenomena. Collectively, the present results highlight a new role for adiponectin in the process of liver regeneration.

  20. Modulation of Lupus Phenotype by Adiponectin Deficiency in Autoimmune Mouse Models

    Parker, Jennifer; Menn-Josephy, Hanni; Laskow, Bari; Takemura, Yukihiro; Aprahamian, Tamar

    2010-01-01

    Adiponectin is an adipocyte-derived cytokine with anti-inflammatory properties. Paradoxically, circulating adiponectin levels are increased in a number of inflammatory diseases. Thus, we sought to define the role of adiponectin deficiency in mouse models of autoimmunity. Adiponectin-deficient mice on a C57BL/6 background do not develop an autoimmune phenotype. Autoimmunity was also not observed in adiponectin-deficient mice generated on the permissive MRL background. However, adiponectin defi...

  1. Total and high molecular weight adiponectin have similar utility for the identification of insulin resistance

    Aguilar-Salinas Carlos A; Navarrete-Lopez Mariana; Arellano-Campos Olimpia; Cruz-Bautista Ivette; Gomez-Perez Francisco J; Mehta Roopa; Cuevas-Ramos Daniel; Almeda-Valdes Paloma

    2010-01-01

    Abstract Background Insulin resistance (IR) and related metabolic disturbances are characterized by low levels of adiponectin. High molecular weight adiponectin (HMWA) is considered the active form of adiponectin and a better marker of IR than total adiponectin. The objective of this study is to compare the utility of total adiponectin, HMWA and the HMWA/total adiponectin index (SA index) for the identification of IR and related metabolic conditions. Methods A cross-sectional analysis was per...

  2. The cardio-protective signaling and mechanisms of adiponectin

    Nanayakkara, Gayani; Kariharan, Thiruchelvan; Wang, Lili; Zhong, Juming; Amin, Rajesh

    2012-01-01

    Adiponectin is an endogenous insulin-sensitizing hormone which has been found to regulate energy metabolism throughout the body, including the heart. However, low levels of adiponectin are found in patients with diabetes, hypertension and cardiovascular diseases. Thus it has been suggested to be an independent predictor for cardiovascular risk. Paradoxically, recent studies have also determined that adiponectin has cardioprotective effects against various cardiac related pathologies which lea...

  3. Association of Low Plasma Adiponectin With Early Diastolic Dysfunction

    Negi, Smita I.; Jeong, Euy-Myoung; Shukrullah, Irfan; Raicu, Mihai; Dudley, Samuel C.

    2012-01-01

    Diastolic dysfunction (DD) with preserved left ventricular (LV) ejection fraction (EF) has been linked to obesity. Adiponectin is a cytokine related to obesity and obesity-linked cardiovascular complications. The authors aimed to determine the independent association of DD with adiponectin. Fifty patients with impaired relaxation DD and a normal EF and age-matched normal controls were recruited. Plasma levels of total and high molecular weight (HMW) adiponectin were measured. Mid and low mole...

  4. Systemic Fate of the Adipocyte-Derived Factor Adiponectin

    Halberg, Nils; Schraw, Todd D.; Wang, Zhao V.; Kim, Ja-Young; Yi, James; Hamilton, Mark P.; Luby-Phelps, Kate; Scherer, Philipp E.

    2009-01-01

    OBJECTIVE The adipocyte-derived secretory protein adiponectin has been widely studied and shown to have potent insulin-sensitizing, antiapoptotic, and anti-inflammatory properties. While its biosynthesis is well understood, its fate, once in circulation, is less well established. RESEARCH DESIGN AND METHODS Here, we examine the half-life of adiponectin in circulation by tracking fluorescently labeled recombinant adiponectin in the circulation, following it to its final destination in the hepa...

  5. Disparity in circulating adiponectin multimers between term and preterm infants

    Siahanidou, Tania; Garatzioti, Maria; Davradou, Maria; Apostolakou, Filia; Papassotiriou, Ioannis; Mandyla, Helen

    2009-01-01

    Aims: To study circulating levels and distribution of adiponectin multimers [low molecular weight (LMW)-, medium molecular weight (MMW)- and high molecular weight (HMW)-adiponectin] in preterm and full-term infants. Methods: Total serum adiponectin and its multimers were measured in 40 healthy infants at the age of one month and associations with anthropometric parameters [body weight and length, body mass index (BMI)], weight gain and metabolic indices (glucose, insulin) were examined. Twen...

  6. Serum adiponectin concentrations in patients with essential hypertension

    LI Xiao-ping; YANG Cheng-ti; GAO Xing-yu; ZHANG Ling; HU Hou-xiang; CHEN Li

    2004-01-01

    To explore the serum levels of adiponectin in patients with essential hypertension and the relationbetween adiponectin and blood pressure. Methods: Forty-five cases with essential hypertension and 43 healthy control sub-jects have been taken fasting blood samples for measurements of plasma glucose, plasma lipids, insulin, C-peptide, thyroidhormones, TNF-α, leptin and adiponectin. Glucose tolerance was assessed by 75-g oral glucose tolerance est. Results: Theconcentrations of adiponectin in cases with essential hypertension were significantly lower than those in the control group(4.15 ± 1.99 vs 7.04 ± 3.13 mg/ml, P = 0.000). Pearson relation analysis showed that serum adiponectin concentrationswere negatively and significantly correlated with body-mass index ( r = - 0. 274, P = 0. 038 ), total cholesterol(r = -0.257, P = 0.048)in control groups, while adiponectin concentrations were negatively and significantly correlatedwith systolic blood pressure ( r = - 0.356, P = 0.016), triglyceride ( r = - 0.367, P = 0.013), tumor necrosis factor-al-pha ( r = - 0. 298, P = 0.047) and triiodothyronine ( r = - 0.317, P = 0. 034) in essential hypertension group. Multipleregression analysis showed that body-mass index was the independent factor to adiponectin levels, and SBP and TNF-α wereadiponectin independent factors in the essential hypertension group. Conclusion: The serum adiponectin concentrations aresignificant lower in patients with essential hypertension, and there is negative and significantly correlation between adiponec-tin and blood pressure.

  7. Elevated Serum Leptin, Adiponectin and Leptin to Adiponectin Ratio Is Associated with Chronic Kidney Disease in Asian Adults

    Cynthia Ciwei Lim; Boon Wee Teo; Shyong Tai, E.; Su Chi Lim; Choong Meng Chan; Sunil Sethi; Tien Y Wong; Charumathi Sabanayagam

    2015-01-01

    Background Adiponectin and leptin, two of the key cytokines secreted by adipocytes, have been shown to be associated with cardiovascular disease. However, the association of these adipocytokines with chronic kidney disease (CKD) is not clear. We examined the association of serum adiponectin, leptin levels and leptin to adiponectin ratio (LAR) with CKD in a population-based sample of Asian adults. Methods We conducted a case-control study (450 CKD cases and 920 controls matched for age, sex an...

  8. Tracing the movement of adiponectin in a parabiosis model of wild-type and adiponectin-knockout mice

    Hideaki Nakatsuji; Ken Kishida; Ryohei Sekimoto; Tohru Funahashi; Iichiro Shimomura

    2014-01-01

    Adiponectin is exclusively synthesized by adipocytes and exhibits anti-diabetic, anti-atherosclerotic and anti-inflammatory properties. Hypoadiponectinemia is associated in obese individuals with insulin resistance and atherosclerosis. However, the mechanisms responsible for hypoadiponectinemia remain unclear. Here, we investigated adiponectin movement using hetero parabiosis model of wild type (WT) and adiponectin-deficient (KO) mice. WT mice were parabiosed with WT mice (WT–WT) or KO mice (...

  9. Tracing the movement of adiponectin in a parabiosis model of wild-type and adiponectin-knockout mice

    Hideaki Nakatsuji

    2014-01-01

    Full Text Available Adiponectin is exclusively synthesized by adipocytes and exhibits anti-diabetic, anti-atherosclerotic and anti-inflammatory properties. Hypoadiponectinemia is associated in obese individuals with insulin resistance and atherosclerosis. However, the mechanisms responsible for hypoadiponectinemia remain unclear. Here, we investigated adiponectin movement using hetero parabiosis model of wild type (WT and adiponectin-deficient (KO mice. WT mice were parabiosed with WT mice (WT–WT or KO mice (WT–KO and adiponectin levels were measured serially up to 63 days after surgery. In the WT–KO parabiosis model, circulating adiponectin levels of the WT partners decreased rapidly, on the other hand, those of KO partners increased, and then these reached comparable levels each other at day 7. Circulating adiponectin levels decreased further to the detection limit of assay, and remained low up to day 63. However, adiponectin protein was detected in the adipose tissues of not only the WT partner but also WT–KO mice. In the diet-induced obesity model, high adiponectin protein levels were detected in adipose stromal vascular fraction of diet-induced obese KO partner, without changes in its binding proteins. The use of parabiosis experiments shed light on movement of native adiponectin among different tissues such as the state of hypoadiponectinemia in obesity.

  10. Clinical significance of adiponectin expression in colon cancer patients

    Mustafa Canhoroz

    2014-01-01

    Conclusion: Adiponectin, which is secreted by adipose tissue, may have a role in the development and progression of cancer via its pro-apoptotic and/or anti-proliferative effects. Adiponectin expression in tumor tissues is likely to have a negative effect on disease - free survival in patients with stage II/III colon cancer; however, no statistically significant effect was demonstrated.

  11. Association between circulating adiponectin levels and polycystic ovarian syndrome

    S.S. Mirza (Saira Saeed); K. Shafique (Kashif); A.R. Shaikh (Abdul Rauf); N.A. Khan (Naveed Ali); M. Anwar Qureshi (Masood)

    2014-01-01

    textabstractBackground: Low adiponectin levels in polycystic ovarian syndrome (PCOS) have been largely attributed to obesity which is common among these patients. In addition, evidence also suggests that low adiponectin in PCOS may be related to insulin resistance (IR) in these women. However, studi

  12. Adiponectin mRNA Expression in the Cat (Felis domesticus

    Angela L. Lusby

    2010-01-01

    Full Text Available Problem statement: Adiponectin is a hormone expressed from adipose tissue in people, rodents and dogs. Adiponectin has anti-inflammatory action with beneficial effects on cardiovascular health and insulin sensitivity. With increasing fat mass, adiponectin concentrations paradoxically decrease. Adiponectin’s role in metabolism and diabetes mellitus is of interest in feline medicine because cats are susceptible to developing type II diabetes with weight gain. This study determined relative amounts of adiponectin mRNA expression from various body tissues and organs in domestic cats. Approach: Two intact male cats and one intact female cat were evaluated post-mortem. All cats were estimated to be young adults and had lean body conditions. Tissues samples from inguinal subcutaneous adipose, visceral mesenteric adipose, liver, skeletal muscle, cardiac muscle, aorta, stomach fundus, duodenum, pancreas, thyroid gland, adrenal gland (cortex and medulla and renal cortex were collected and frozen. Following RNA extraction, adiponectin mRNA expression of each tissue was detected using Reverse Transcriptase (RT real-time (Q PCR. Results: Visceral adipose tissue had the highest level of expression, averaging 12% higher than subcutaneous adipose. All other tissues had negligible levels of expression compared to adipose samples. Conclusion: This study provided a valuable step for adiponectin research in cats by determining which tissues express this hormone. Cats differ from human beings by expressing higher levels of adiponectin in visceral compared to subcutaneous fat. The metabolic impact of this expression pattern is not known and provides a basis for future research.

  13. Plasma adiponectin and endogenous glucose production in humans

    Stefan, Norbert; Stumvoll, Michael; Vozarova, Barbora;

    2003-01-01

    High plasma adiponectin is associated with reduced risk of type 2 diabetes, probably a consequence of its insulin-sensitizing properties. In vivo data in rodents suggest that the insulin-sensitization responsible for improvement of glycemia occurs in muscle and liver. Whereas associations of plasma...... adiponectin with muscle insulin sensitivity in humans have been examined, this has not been done for the liver....

  14. Linkage analysis of circulating levels of adiponectin in hispanic children

    Adiponectin, a hormone produced exclusively by adipose tissue, is inversely associated with insulin resistance and pro-inflammatory conditions. The aim of this study was to find quantitative trait loci (QTLs) that affect circulating levels of adiponectin in Hispanic children participating in the VVA...

  15. Adiponectin as a potential biomarker of vascular disease

    Ebrahimi-Mamaeghani M

    2015-01-01

    Full Text Available Mehrangiz Ebrahimi-Mamaeghani,1 Somayeh Mohammadi,2 Seyed Rafie Arefhosseini,3 Parviz Fallah,4 Zahra Bazi5 1Nutrition Research Center, 2Department of Nutrition, 3Department of Food Technology, Faculty of Nutrition Sciences, Tabriz University of Medical Sciences, Tabriz, 4Department of Molecular Biology and Genetic Engineering, Stem Cell Technology Research Center, Tehran, 5Department of Biotechnology, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, IranAbstract: The increasing prevalence of diabetes and its complications heralds an alarming situation worldwide. Obesity-associated changes in circulating adiponectin concentrations have the capacity to predict insulin sensitivity and are a link between obesity and a number of vascular diseases. One obvious consequence of obesity is a decrease in circulating levels of adiponectin, which are associated with cardiovascular disorders and associated vascular comorbidities. Human and animal studies have demonstrated decreased adiponectin to be an independent risk factor for cardiovascular disease. However, in animal studies, increased circulating adiponectin alleviates obesity-induced endothelial dysfunction and hypertension, and also prevents atherosclerosis, myocardial infarction, and diabetic cardiac tissue disorders. Further, metabolism of a number of foods and medications are affected by induction of adiponectin. Adiponectin has beneficial effects on cardiovascular cells via its antidiabetic, anti-inflammatory, antioxidant, antiapoptotic, antiatherogenic, vasodilatory, and antithrombotic activity, and consequently has a favorable effect on cardiac and vascular health. Understanding the molecular mechanisms underlying the regulation of adiponectin secretion and signaling is critical for designing new therapeutic strategies. This review summarizes the recent evidence for the physiological role and clinical significance of adiponectin in vascular health, identification of

  16. Adiponectin gene ADIPOQ SNP associations with serum adiponectin in two female populations and effects of SNPs on promoter activity

    Kyriakou, Theodosios; Collins, Laura J.; Spencer-Jones, Nicola J.; Malcolm, Claire; Wang, Xiaoling; Snieder, Harold; Swaminathan, Ramasamyiyer; Burling, Keith A.; Hart, Deborah J.; Spector, Tim D.; O'Dell, Sandra D.

    2008-01-01

    Adiponectin is an insulin sensitiser in muscle and liver, and low serum levels characterise obesity and insulin resistance. Eight tagging single nucleotide polymorphisms (tSNPs) in the ADIPOQ gene and promoter were selected, and association with serum adiponectin was tested, in two independent sampl

  17. Common Polymorphisms in the Adiponectin Gene ACDC Are Not Associated With Diabetes in Pima Indians

    de Courten, Barbora; Hanson, Robert L; Funahashi, Tohru;

    2005-01-01

    Adiponectin is an abundant adipose tissue-derived protein with important metabolic effects. Plasma adiponectin levels are decreased in obese individuals, and low adiponectin levels predict insulin resistance and type 2 diabetes. Two variants in the adiponectin gene ACDC have been previously assoc...

  18. High-Molecular-Weight Adiponectin and the Risk of Type 2 Diabetes in the ARIC Study

    Zhu, Na; James S. Pankow; Ballantyne, Christie M.; Couper, David; Hoogeveen, Ron C; Pereira, Mark; Duncan, Bruce B.; Schmidt, Maria Inês

    2010-01-01

    Context: Adiponectin, synthesized by adipocytes, has been shown to be a predictor of type 2 diabetes. Adiponectin circulates in plasma as three oligomeric isoforms. High-molecular-weight (HMW) adiponectin is thought to be the most biologically active form of adiponectin in terms of glucose homeostasis.

  19. Plasma adiponectin before and after kidney transplantation

    Idorn, Thomas; Hornum, Mads; Bjerre, Mette;

    2012-01-01

    The role of plasma adiponectin (ADPN) in patients with impaired kidney function and following kidney transplantation (Tx) is debated. We aimed to: (i) determine whether pretransplant ADPN level is an independent risk factor for deterioration of glucose tolerance including development of new......-onset diabetes mellitus after Tx, (ii) describe which parameters that influence the ADPN concentration before and after Tx. Fifty-seven nondiabetic kidney allograft recipients and 40 nondiabetic uraemic patients were included. The Tx group was examined at baseline and 3 and 12 months after Tx. The uraemic...

  20. Study on the influence of adiponectin genetic variants and adiponectin levels among Indonesian women with polycystic ovary syndrome

    Bertha Pangaribuan

    2012-05-01

    Full Text Available Background: Insulin resistance and central adiposity are frequent disorders in PCOS women, which are marked by biological marker dysregulation related to this metabolic abnormalities. Association between adiponectin and insulin resistance has been investigated in many studies, while only a few studies were done in PCOS patients. This study is to determine the association of T45G polymorphisms in Indonesian population with PCOS biological markers and their influence to adiponectin serum.Methods: Fifty-two PCOS patients and 52 normal ovulatory women without hyperandrogenism as control subjects were included. Blood samples were collected between day 3 and 5 of a spontaneous menstrual cycle at 7 to 9 am, after overnight fasting. Serum levels of FSH, LH, testosterone, SHBG, glucose, insulin, lipid profile and adiponectin were measured. Insulin resistance was estimated by HOMA-IR, HOMA-β, and SHBG. T45G gene polymorphisms were determined by PCR after genomic DNA was obtained from peripheral blood of patients and control subjects.Results: There were significant difference between PCOS and control group in term of BMI, LH, testosterone, SHBG, and FAI, but not significant to T45G gene polymorphisms frequency distribution. Adiponectin levels were lower in PCOS patients than control. There was an association between insulin resistance with PCOS. Among PCOS patients, no association between adiponectin LH, testosterone, SHBG, and FAI with T45G gene polymorphisms. T45G gene polymorphisms were more frequent in PCOS with low adiponectin levels compared to those with high adiponectin levels, although not significant statistically.Conclusion: T45G gene polymorphisms has no direct association with PCOS biological markers, but its association with adiponectin needs further study. (Med J Indones. 2012;21:83-91Keywords: Adiponectin, insulin resistance, polycystic ovary syndrome, T45G adiponectin gene

  1. Identification of Adiponectin Receptor Agonist Utilizing a Fluorescence Polarization Based High Throughput Assay

    Yiyi Sun; Zhihe Zang; Ling Zhong; Min Wu; Qing Su; Xiurong Gao; Wang Zan; Dong Lin; Yan Zhao; Zhonglin Zhang

    2013-01-01

    Adiponectin, the adipose-derived hormone, plays an important role in the suppression of metabolic disorders that can result in type 2 diabetes, obesity, and atherosclerosis. It has been shown that up-regulation of adiponectin or adiponectin receptor has a number of therapeutic benefits. Given that it is hard to convert the full size adiponectin protein into a viable drug, adiponectin receptor agonists could be designed or identified using high-throughput screening. Here, we report on the deve...

  2. Adiponectin Deficiency Promotes Tumor Growth in Mice by Reducing Macrophage Infiltration

    Yutong Sun; Lodish, Harvey F.

    2010-01-01

    Adiponectin is an adipocyte-derived plasma protein that has been implicated in regulating angiogenesis, but the role of adiponectin in regulating this process is still controversial. In this study, in order to determine whether adiponectin affects tumor growth and tumor induced vascularization, we implanted B16F10 melanoma and Lewis Lung Carcinoma cells subcutaneously into adiponectin knockout and wild-type control mice, and found that adiponectin deficiency markedly promoted the growth of bo...

  3. Adiponectin action: a combination of endocrine and autocrine/paracrine effects

    Gary eSweeney

    2011-01-01

    The widespread physiological actions of adiponectin have now been well characterized as clinical studies and work in animal models have established strong correlations between circulating adiponectin levels and various disease-related outcomes. Thus, conventional thinking attributes many of adiponectins beneficial effects to endocrine actions of adipose-derived adiponectin. However, it is now clear that several tissues can themselves produce adiponectin and there is growing evidence that loca...

  4. Selective Suppression of Endothelial Cell Apoptosis by the High Molecular Weight Form of Adiponectin

    Kobayashi, Hideki; Ouchi, Noriyuki; Kihara, Shinji; Walsh, Kenneth; Kumada, Masahiro; ABE, YUKI; Funahashi, Tohru; Matsuzawa, Yuji

    2004-01-01

    Adiponectin is an adipocyte-derived, antiatherogenic protein that is present in serum as three isoforms. Total adiponectin levels are decreased in obese or diabetic humans or animal models. This study was designed to elucidate the relative isoform distribution of adiponectin in human disease states and identify the active form of adiponectin toward vascular endothelial cells. The percentage of high molecular weight form (HMW) per total adiponectin was significantly lower in patients with coro...

  5. Adiponectin suppresses colorectal carcinogenesis under the high-fat diet condition

    Fujisawa, T.; Endo, H; Tomimoto, A; Sugiyama, M; Takahashi, H; Saito, S.; Inamori, M.; Nakajima, N.; Watanabe, M.(Niigata University, 950-2181, Niigata, Japan); Kubota, N; Yamauchi, T.; Kadowaki, T; Wada, K.; Nakagama, H; Nakajima, A

    2008-01-01

    Background and aims: The effect of adiponectin on colorectal carcinogenesis has been proposed but not fully investigated. We investigated the effect of adiponectin deficiency on the development of colorectal cancer. Methods: We generated three types of gene-deficient mice (adiponectin-deficient, adiponectin receptor 1-deficient, and adiponectin receptor 2-deficient) and investigated chemical-induced colon polyp formation and cell proliferation in colon epithelium. Western blot analysis was pe...

  6. Review: Adiponectin – The Missing Link between Maternal Adiposity, Placental Transport and Fetal Growth?

    Aye, Irving L.M.H.; Powell, Theresa L.; Jansson, Thomas

    2012-01-01

    Adiponectin has well-established insulin-sensitizing effects in non-pregnant individuals. Pregnant women who are obese or have gestational diabetes typically have low circulating levels of adiponectin, which is associated with increased fetal growth. Lean women, on the other hand, have high circulating levels of adiponectin. As a result, maternal serum adiponectin is inversely correlated to fetal growth across the full range of birth weights, suggesting that maternal adiponectin may limit fet...

  7. Chronic Ethanol Feeding to Rats Decreases Adiponectin Secretion by Subcutaneous Adipocytes

    Chen, Xiaocong; Sebastian, Becky M.; Nagy, Laura E.

    2006-01-01

    Chronic ethanol feeding to mice and rats decreases serum adiponectin concentration and adiponectin treatment attenuates chronic ethanol-induced liver injury. While it is clear that lowered adiponectin has pathophysiological importance, the mechanisms by which chronic ethanol decreases adiponectin are not known. Here we have investigated the impact of chronic ethanol feeding on adiponectin expression and secretion by adipose tissue. Rats were fed a 36% Lieber-DeCarli ethanol-containing liquid ...

  8. Circulating High-Molecular-Weight (HMW) Adiponectin Level Is Related with Breast Cancer Risk Better than Total Adiponectin: A Case-Control Study

    Ming-ming Guo; Xue-ning Duan; Shu-de Cui; Fu-guo Tian; Xu-chen Cao; Cui-zhi Geng; Zhi-min Fan; Xiang Wang; Shu Wang; Hong-chuan Jiang; Jian-guo Zhang; Feng Jin; Jin-hai Tang; Hong Liang; Zhen-lin Yang

    2015-01-01

    The level of total adiponectin, a mixture of different adiponectin forms, has been reported associated with breast cancer risk with inconsistent results. Whether the different forms play different roles in breast cancer risk prediction is unclear. To examine this, we measured total and high molecular weight (HMW) adiponectin in a case-control study (1167 sets). Higher circulating HMW adiponectin was negatively associated with breast cancer risk after adjusting for menopausal status and family...

  9. Adiponectin: an adipokine with protective features against metabolic syndrome

    Maryam Esfahani

    2015-05-01

    Full Text Available Metabolic syndrome (MetS as a collection of obesity-associated disorders is associated with inflammation, oxidative stress, pro-thrombotic state, elevated risk of developing cardiovascular disease and type 2 diabetes. Adiponectin is one of the most abundant peptide hormones derived from adipose tissue. This protein plays a major role in glucose and lipid metabolism and prevents development of vascular changes. Anti-oxidative and anti-inflammatory effects are the other features of adiponectin. Hypoadiponectinemia is associated with hypertension and pro-thrombotic state. In this review, we discuss the crucial role of adiponectin in prevention of metabolic syndrome considering its effects on the components of this syndrome. Pharmacological interventions and lifestyle modification may increase plasma adiponectin level or tissue sensitivity which seems to be a promising target for prevention and therapeutic approaches of MetS and related diseases.

  10. Regulation of adiponectin in adipocytes upon exposure to HIV-1

    Adipose dysregulation, dyslipidemia, and insulin resistance are hallmarks of HIV-related lipodystrophy. The precise mechanisms behind these disturbances are unknown. In HIV-infected patients, we previously demonstrated a strong relationship between lipodystrophy and levels of adiponectin, an adipose...

  11. Plasma Adiponectin Levels in Elderly Patients with Prediabetes

    Kong, Si Eun; Kang, Yea Eun; Joung, Kyong Hye; Lee, Ju Hee; Kim, Hyun Jin

    2015-01-01

    Background The significance of adiponectin levels in elderly individuals with prediabetes has yet to be determined. Thus, the present study was performed to evaluate the relationships between adiponectin levels and anthropometric variables, body composition parameters, insulin sensitivity, and lipid profiles in elderly prediabetic patients. Methods The present study included 120 subjects with prediabetes who were >65 years of age and were selected from among 1,993 subjects enrolled in the Korea Rural Genomic Cohort Study. All subjects underwent a 75 g oral glucose tolerance test and tests for measurement of insulin sensitivity. All diagnoses of prediabetes satisfied the criteria of the American Diabetes Association. Results Plasma adiponectin levels were lower in elderly prediabetic subjects than elderly subjects with normal glucose tolerance (P<0.01) as well as in elderly prediabetic patients with metabolic syndrome (MetS) than in those without MetS (P<0.02). When the subjects were categorized into two groups according to plasma adiponectin levels, the waist-to-hip ratio and 2-hour insulin levels were significantly lower in individuals with high plasma adiponectin levels than in those with low plasma adiponectin levels. Additionally, the plasma adiponectin levels of elderly prediabetic subject were inversely correlated with body mass index (BMI), waist circumference (WC), waist-to-hip ratio, visceral fat, visceral fat ratio, and 2-hour insulin levels. Conclusion The present findings demonstrated that the major factors correlated with adiponectin levels in elderly prediabetic subjects were BMI, WC, waist-to-hip ratio, visceral fat, visceral fat ratio, and 2-hour insulin levels. PMID:26248857

  12. Prediagnostic Adiponectin Concentrations and Pancreatic Cancer Risk in Male Smokers

    Stolzenberg-Solomon, Rachael Z; Weinstein, Stephanie; Pollak, Michael; Tao, Yuzhen; Taylor, Philip R.; Virtamo, Jarmo; Albanes, Demetrius

    2008-01-01

    Adiponectin, a hormone secreted by adipocytes, has insulin-sensitizing, antidiabetic, antiinflammatory, and antiangiogenic properties. The authors conducted a nested case-control study in the Alpha-Tocopherol, Beta-Carotene Cancer Prevention Study cohort, a cohort of male Finnish smokers aged 50–69 years at baseline, to test whether prediagnostic adiponectin concentrations are associated with pancreatic cancer. Between January 1985 and October 2004, 311 incident exocrine pancreatic cancer cas...

  13. Differentiation of human pre-adipocytes by recombinant adiponectin

    Avides, Maria do Carmo; Domingues, Lucília; Vicente, A.A.; J. A. Teixeira

    2008-01-01

    Obesity has become a global health problem and it is linked to a higher risk of diseases and metabolic disorders such as diabetes, cardiovascular disease, and cancer. The adipose tissue plays an important role in monitoring and controlling whole-body metabolism by secreting a variety of bioactive molecules such as adiponectin. Deficiencies of this hormone can cause type II diabetes and cardiovascular disease both in mice and in humans. Therefore, adiponectin is an attractive molecule...

  14. Epidemiologic evidence on serum adiponectin level and lipid profile

    Vajihe Izadi; Elaheh Farabad; Leila Azadbakht

    2013-01-01

    The concentration of adiponectin, a hormone which is secreted from adipose tissue, is inversely correlated with body fat mass. This hormone has anti inflammatory and anti atherogenic properties. Its concentration reduces in metabolic syndrome and cardiovascular diseases. This study reviews the evidence on the relationship between serum adiponectin concentration and lipid profile. In this study former clinical trials, cross sectional and prospective studies have been reviewed. The PubMed searc...

  15. Adiponectin: Genetic determinants and relations with subclinical cardiovascular disease

    Gustafsson, Stefan

    2013-01-01

    Cardiovascular disease (CVD) is a major cause of morbidity and premature death in Sweden and globally, which besides the substantial individual suffering, puts large restraints on the public health system. Adiponectin is a highly heritable trait, which is strongly associated with metabolic disturbances such as obesity and insulin resistance. Previous studies indicate that adiponectin may play a fundamental role in the development of CVD. However, further knowledge about pathways linking circu...

  16. IGFBP-3, hypoxia and TNF-α inhibit adiponectin transcription

    The thiazolidinedione rosiglitazone, an agonist ligand for the nuclear receptor PPAR-γ, improves insulin sensitivity in part by stimulating transcription of the insulin-sensitizing adipokine adiponectin. It activates PPAR-γ-RXR-α heterodimers bound to PPAR-γ response elements in the adiponectin promoter. Rosiglitazone-stimulated adiponectin protein synthesis in 3T3-L1 mouse adipocytes has been shown to be inhibited by IGFBP-3, which can be induced by hypoxia and the proinflammatory cytokine, TNF-α, two inhibitors of adiponectin transcription. The present study demonstrates that IGFBP-3, the hypoxia-mimetic agent cobalt chloride, and TNF-α inhibit rosiglitazone-induced adiponectin transcription in mouse embryo fibroblasts that stably express PPAR-γ2. Native IGFBP-3 can bind RXR-α and inhibited rosiglitazone stimulated promoter activity, whereas an IGFBP-3 mutant that does not bind RXR-α did not. These results suggest that IGFBP-3 may mediate the inhibition of adiponectin transcription by hypoxia and TNF-α, and that IGFBP-3 binding to RXR-α may be required for the observed inhibition.

  17. IGFBP-3, hypoxia and TNF-{alpha} inhibit adiponectin transcription

    Zappala, Giovanna, E-mail: zappalag@mail.nih.gov [Diabetes Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD (United States); Rechler, Matthew M. [Diabetes Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD (United States); Clinical Endocrinology Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD (United States)

    2009-05-15

    The thiazolidinedione rosiglitazone, an agonist ligand for the nuclear receptor PPAR-{gamma}, improves insulin sensitivity in part by stimulating transcription of the insulin-sensitizing adipokine adiponectin. It activates PPAR-{gamma}-RXR-{alpha} heterodimers bound to PPAR-{gamma} response elements in the adiponectin promoter. Rosiglitazone-stimulated adiponectin protein synthesis in 3T3-L1 mouse adipocytes has been shown to be inhibited by IGFBP-3, which can be induced by hypoxia and the proinflammatory cytokine, TNF-{alpha}, two inhibitors of adiponectin transcription. The present study demonstrates that IGFBP-3, the hypoxia-mimetic agent cobalt chloride, and TNF-{alpha} inhibit rosiglitazone-induced adiponectin transcription in mouse embryo fibroblasts that stably express PPAR-{gamma}2. Native IGFBP-3 can bind RXR-{alpha} and inhibited rosiglitazone stimulated promoter activity, whereas an IGFBP-3 mutant that does not bind RXR-{alpha} did not. These results suggest that IGFBP-3 may mediate the inhibition of adiponectin transcription by hypoxia and TNF-{alpha}, and that IGFBP-3 binding to RXR-{alpha} may be required for the observed inhibition.

  18. Elevated serum leptin, adiponectin and leptin to adiponectin ratio is associated with chronic kidney disease in Asian adults.

    Cynthia Ciwei Lim

    Full Text Available Adiponectin and leptin, two of the key cytokines secreted by adipocytes, have been shown to be associated with cardiovascular disease. However, the association of these adipocytokines with chronic kidney disease (CKD is not clear. We examined the association of serum adiponectin, leptin levels and leptin to adiponectin ratio (LAR with CKD in a population-based sample of Asian adults.We conducted a case-control study (450 CKD cases and 920 controls matched for age, sex and ethnicity involving Chinese and Indian adults aged 40-80 years who participated in the Singapore Epidemiology of Eye Diseases Study (2007-2011. CKD was defined as an estimated glomerular filtration rate 0.1.Higher levels of serum adiponectin, leptin and LAR were positively associated with CKD independent of traditional risk factors in this Asian population.

  19. Similar Adiponectin Levels in Obese Normotensive and Obese Hypertensive Men and No Vasorelaxant Effect of Adiponectin on Human Arteries

    Dreier, Rasmus; Asferg, Camilla; Berg, Jais O;

    2016-01-01

    Obesity is a strong risk factor for hypertension, but the mechanism linking obesity to hypertension is not fully elucidated. In obesity, circulating concentrations of adiponectin are decreased and hypoadiponectinaemia has in some but not all studies been associated with increased risk of...... hypertension. Due to this inconsistency, we decided to study adiponectin from two aspects in a cross-sectional in vivo study and in an experimental in vitro study. In the cross-sectional study, 103 men with body mass index (BMI) ≥ 30.0 kg/m(2) were studied; 63 had 24-hr ambulatory blood pressure (ABP) ≥ 130......, the direct vasomotor response of adiponectin was tested on subcutaneous resistance arteries from human abdominal adipose tissue. The two obese groups had lower adiponectin concentrations compared with LeanNT (p < 0.01) [median (interquartile range)]: ObeseHT 6.5 (5.1-8.3) mg/L; ObeseNT 6.6 (5...

  20. Similar Adiponectin Levels in Obese Normotensive and Obese Hypertensive Men and No Vasorelaxant Effect of Adiponectin on Human Arteries.

    Dreier, Rasmus; Asferg, Camilla; Berg, Jais O; Andersen, Ulrik B; Flyvbjerg, Allan; Frystyk, Jan; Linneberg, Allan; Jeppesen, Jørgen L; Edvinsson, Lars; Skovsted, Gry F

    2016-02-01

    Obesity is a strong risk factor for hypertension, but the mechanism linking obesity to hypertension is not fully elucidated. In obesity, circulating concentrations of adiponectin are decreased and hypoadiponectinaemia has in some but not all studies been associated with increased risk of hypertension. Due to this inconsistency, we decided to study adiponectin from two aspects in a cross-sectional in vivo study and in an experimental in vitro study. In the cross-sectional study, 103 men with body mass index (BMI) ≥ 30.0 kg/m(2) were studied; 63 had 24-hr ambulatory blood pressure (ABP) ≥ 130/80 mmHg (ObeseHT) and 40 had 24-hr ABP vasoconstriction. In conclusion, obese hypertensive men have similar serum concentrations of adiponectin as obese normotensive men. In combination with the in vitro data, these findings question a pathogenic role of adiponectin in human hypertension. PMID:26272341

  1. Total adiponectin and adiponectin multimeric complexes in relation to weight loss-induced improvements in insulin sensitivity in obese women

    Polak, J.; Kovacova, Z.; Holst, C.;

    2008-01-01

    AIM: Adiponectin increases insulin sensitivity, protects arterial walls against atherosclerosis, and regulates glucose metabolism, and is decreased in obese, insulin resistant, and type 2 diabetic patients. Adiponectin circulates in plasma as high, medium, and low molecular weight forms (HMW, MMW......, and LMW). The HMW form was suggested to be closely associated with insulin sensitivity. This study investigated whether diet-induced changes in insulin sensitivity were associated with changes in adiponectin multimeric complexes. SUBJECTS: Twenty obese women with highest and twenty obese women with...... kcal/d less than energy requirements). Plasma HMW, MMW, and LMW forms of adiponectin were quantified using Western blot method. RESULTS: LCD induced comparable weight reduction in responders and non-responders by 8.2 and 7.6 kg. Homeostasis model assessment insulin resistance index decreased by 48...

  2. Adiponectin promotes pancreatic cancer progression by inhibiting apoptosis via the activation of AMPK/Sirt1/PGC-1α signaling

    Huang, Bingqing; Cheng, Xixi; Wang, Dan; Peng, Meiyu; Xue, Zhenyi; Da, Yurong; Ning ZHANG; Yao, Zhi; Li, Min; Xu, Aimin; Zhang, Rongxin

    2014-01-01

    Adiponectin is an adipocyte-secreted adipokine with pleiotropic actions. Clinical evidence has shown that serum adiponectin levels are increased and that adiponectin can protect pancreatic beta cells against apoptosis, which suggests that adiponectin may play an anti-apoptotic role in pancreatic cancer (PC). Here, we investigated the effects of adiponectin on PC development and elucidated the underlying molecular mechanisms. Adiponectin deficiency markedly attenuated pancreatic tumorigenesis ...

  3. [Adipokines: adiponectin, leptin, resistin and coronary heart disease risk].

    Kopff, Barbara; Jegier, Anna

    2005-01-01

    Visceral obesity is among the known risk factors of atherosclerotic cardiovascular diseases. As long as adipose tissue was considered only an inert store of excess energy, accumulated in triglycerides, explanation of the mechanisms causing increased cardiovascular risk in obesity was difficult. Finding that the adipose tissue is an active endocrine organ and that the adipokines secreted in it influence several metabolic processes, allowed better understanding of this correlation. Several disturbances in secretion, function and balance of adipokines occur in the course of obesity. Changes of adiponectin, leptin and resistin concentrations are among the reasons of accelerated atherosclerosis occurring in the visceral adiposity. Adiponectin concentrations are decreased in visceral adiposity. Adiponectin is adipokine possessing antiatherogenic properties. It's effects exerted though the specific receptors in skeletal muscles and liver include decreased insulin resistance and improved plasma lipid profile. Acting directly in the vessel wall adiponectin prevents development of atheromatic lesions by inhibiting production of adhesive molecules and formation of foam cells. It has been found that decreased adiponectin concentrations are connected not only with increased coronary risk but also with progression of atherosclerosis in coronary vessels. Moreover it was found that adiponectin plasma concentration is significantly decreased in acute coronary incidences. Leptin regulates energy metabolism and balance. The concentrations of this adipokine are increased in obesity and correlate with insulin resistance. Hiperleptinemia has been also recognized as cardiovascular diseases risk factor. Resistin is considered to be a substance increasing insulin resistance, however the exact mechanisms are not known. Resistin plasma concentrations are increased in obese subjects and correlate with the inflammatory state that underlies the initiation and progression of atherosclerotic

  4. Status of serum adiponectin related to insulin resistance in prediabetics

    Obejctive: To find the status of serum adiponectin in individuals progressing towards Type 2 diabetes mellitus and compare it with normal glucose tolerant subjects to determine the stage where alteration of adiponectin occurred. Methods: The cross-sectional study was carried out at the Department of Biochemistry, Jinnah Postgraduate Medical Centre, Karachi, during January to August 2008. Subjects were invited through various diabetes screening camps. A total of 608 subjects >30 years of age without prior history of diabetes were screened through fasting plasma glucose and 2-hour oral glucose tolerance test. Forty randomly selected pre-diabetic subjects and 40 age and gender-matched subjects were included in the study. Anthropometric measurements were done. Serum insulin and adiponectin were estimated by enzyme-linked immunosorbent assay. Homeostasis model assessment of insulin resistance (HOMA-IR) was used to calculate insulin resistance mathematically. Result: Mean fasting and two-hour plasma glucose, body mass index, waist, hip circumference and blood pressure were significantly raised in pre-diabetics compared to those with normal glucose tolerance. Adiponectin was significantly decreased, while insulin and HOMA-IR were raised significantly in the pre-diabetics. Adiponectin showed significant negative correlation with body mass index (r=-0.31, p=0.005), fasting plasma glucose (r=-0.24, p= 0.032), 2-hour plasma glucose (r=-0.42, p<0.0001)), insulin (r-0.43, p<0.0001) and HOMA-IR (r= -0.43, p<0.0001) and remained significant after adjustment of body mass index, gender and insulin level in pre-diabetics. Conclusion: Adiponectin estimation may help in earlier identification of impending diabetes. However, casual link between adiponectin and pre-diabetes remained unexplored due to the study design and small sample size that warrants longitudinal large-scale studies. (author)

  5. Relationships between inflammation, adiponectin, and oxidative stress in metabolic syndrome.

    Shu-Ju Chen

    Full Text Available Metabolic syndrome (MS represents a cluster of physiological and anthropometric abnormalities. The purpose of this study was to investigate the relationships between the levels of inflammation, adiponectin, and oxidative stress in subjects with MS. The inclusion criteria for MS, according to the Taiwan Bureau of Health Promotion, Department of Health, were applied to the case group (n = 72. The control group (n = 105 comprised healthy individuals with normal blood biochemical values. The levels of inflammatory markers [high sensitivity C-reactive protein (hs-CRP and interleukin-6 (IL-6, adiponectin, an oxidative stress marker (malondialdehyde, and antioxidant enzymes activities [catalase (CAT, superoxide dismutase (SOD, and glutathione peroxidase (GPx] were measured. Subjects with MS had significantly higher concentrations of inflammatory markers and lower adiponectin level, and lower antioxidant enzymes activities than the control subjects. The levels of inflammatory markers and adiponectin were significantly correlated with the components of MS. The level of hs-CRP was significantly correlated with the oxidative stress marker. The IL-6 level was significantly correlated with the SOD and GPx activities, and the adiponectin level was significantly correlated with the GPx activity. A higher level of hs-CRP (≥1.00 mg/L, or IL-6 (≥1.50 pg/mL or a lower level of adiponectin (<7.90 µg/mL were associated with a significantly greater risk of MS. In conclusion, subjects suffering from MS may have a higher inflammation status and a higher level of oxidative stress. A higher inflammation status was significantly correlated with decreases in the levels of antioxidant enzymes and adiponectin and an increase in the risk of MS.

  6. Adiponectin as a protective factor in hepatic steatosis

    Nahum Méndez-Sánchez; Norberto C. Chávez-Tapia; Antonio R. Villa; Karla Sánchez-Lara; Daniel Zamora-Valdés; Martha H. Ramos; Misael Uribe

    2005-01-01

    AIM: Obesityand insulin resistance (IR) are closely related to hepatic steatosis (HS), and adiponectin is a hepatic insulin sensitizer that has important effects in liver function.This study aims at investigating the relationship between serum adiponectin concentration and the presence of HS.METHODS: We carried out a cross-sectional study in a check-up unit of a University Hospital in Mexico City. We enrolled 196 subjects, comprising 98 subjects with HS (27 women, 71 men) and 98 controls (37 women and 61men). Anthropometric, metabolic and biochemical variables were measured in the two groups. Serum adiponectin and leptin concentrations were determined,their association with grade of HS tested, and concentrations,according to quartiles, compared between cases and controls. χ2 analysis for linear trends was used to test for a dose-response relationship and logistic regression analysis was conducted to test for a protective effect of adiponectin.RESULTS: The HS subjects were older and more obese than controls, with a central obesity pattern. In the fourth quartile of adiponectin concentrations, HS was less common and severe. In a multivariate model of the fourth quartile of the adiponectin concentrations, we observed a protective effect (OR = 0.17, 95%CI: 0.04-0.67, P= 0.01).In subjects with more severe HS, we observed higher leptin concentrations, and caloric intakes, total fat and iron consumption were higher than in controls.CONCLUSION: The results of the present study suggest that a high serum concentration of adiponectin is associated with a protective effect against HS.

  7. Adiponectin mediates antiproliferative and apoptotic responses in human MCF7 breast cancer cells

    It is well established that obesity is a risk factor for breast cancer and that blood levels of adiponectin, a hormone mainly secreted by white adipocytes, are inversely correlated with the body fat mass. As adiponectin elicits anti-proliferative effects in some cell types, we tested the hypothesis that adiponectin could influence human breast cancer MCF-7 cell growth. Here we show that MCF-7 cells express adiponectin receptors and respond to human recombinant adiponectin by reducing their growth, AMPkinase activation, and p42/p44 MAPkinase inactivation. Further, we demonstrate that the anti-proliferative effect of adiponectin involves activation of cell apoptosis and inhibition of cell cycle. These findings suggest that adiponectin could act in vivo as a paracrine/endocrine growth inhibitor towards mammary epithelial cells. Moreover, adipose adiponectin production being strongly reduced in obesity, this study may help to explain why obesity is a risk factor of developing breast cancers

  8. The inverse association of incident cardiovascular disease with plasma bilirubin is unaffected by adiponectin

    Dullaart, Robin P. F.; Boersema, Jeltje; Lefrandt, Joop D.; Wolffenbuttel, Bruce H. R.; Bakker, Stephan J. L.

    2014-01-01

    Objective: Bilirubin may protect against atherosclerotic cardiovascular disease (CVD). The heme oxygenase pathway is crucial for bilirubin generation, and is stimulated by adiponectin. We tested the relationship of plasma bilirubin with adiponectin, and determined whether the association of incident

  9. DsbA-L Alleviates Endoplasmic Reticulum Stress–Induced Adiponectin Downregulation

    Zhou, Lijun; Liu, Meilian; Zhang, Jingjing; Chen, Hongzhi; Dong, Lily Q.; Liu, Feng

    2010-01-01

    OBJECTIVE Obesity impairs adiponectin expression, assembly, and secretion, yet the underlying mechanisms remain elusive. The aims of this study were 1) to determine the molecular mechanisms by which obesity impairs adiponectin multimerization and stability, and 2) to determine the potential role of disulfide-bond-A oxidoreductase-like protein (DsbA-L), a recently identified adiponectin interactive protein that promotes adiponectin multimerization and stability in obesity-induced endoplasmic r...

  10. Adiponectin mRNA Expression in the Cat (Felis domesticus)

    Angela L. Lusby; Kania, Stephen A.; Bartges, Joseph W.; Claudia A. Kirk

    2010-01-01

    Problem statement: Adiponectin is a hormone expressed from adipose tissue in people, rodents and dogs. Adiponectin has anti-inflammatory action with beneficial effects on cardiovascular health and insulin sensitivity. With increasing fat mass, adiponectin concentrations paradoxically decrease. Adiponectins role in metabolism and diabetes mellitus is of interest in feline medicine because cats are susceptible to developing type II diabetes with weight gain. This study deter...

  11. Adiponectin Action: A Combination of Endocrine and Autocrine/Paracrine Effects

    Dadson, Keith; Liu, Ying; Sweeney, Gary

    2011-01-01

    The widespread physiological actions of adiponectin have now been well characterized as clinical studies and works in animal models have established strong correlations between circulating adiponectin level and various disease-related outcomes. Thus, conventional thinking attributes many of adiponectin’s beneficial effects to endocrine actions of adipose-derived adiponectin. However, it is now clear that several tissues can themselves produce adiponectin and there is growing evidence that loc...

  12. Adiponectin Increases Skeletal Muscle Mitochondrial Biogenesis by Suppressing Mitogen-Activated Protein Kinase Phosphatase-1

    Qiao, Liping; Kinney, Brice; Yoo, Hyung sun; Lee, Bonggi; Schaack, Jerome; Shao, Jianhua

    2012-01-01

    Adiponectin enhances mitochondrial biogenesis and oxidative metabolism in skeletal muscle. This study aimed to investigate the underlying mechanisms through which adiponectin induces mitochondrial biogenesis in skeletal muscle. Mitochondrial contents, expression, and activation status of p38 mitogen-activated protein kinase (MAPK) and PPARγ coactivator 1α (PGC-1α) were compared between skeletal muscle samples from adiponectin gene knockout, adiponectin-reconstituted, and control mice. Adenovi...

  13. Clinical review: Adiponectin biology and its role in inflammation and critical illness

    Robinson, Katherine; Prins, John; Venkatesh, Bala

    2011-01-01

    Adiponectin is an adipokine first described just over a decade ago. Produced almost exclusively by adipocytes, adiponectin circulates in high concentrations in human plasma. Research into this hormone has revealed it to have insulin-sensitizing, anti-inflammatory and cardioprotective roles. This review discusses the history, biology and physiological role of adiponectin and explores its role in disease, with specific focus on adiponectin in inflammation and sepsis. It appears that an inverse ...

  14. Obesity-induced DNA hypermethylation of the adiponectin gene mediates insulin resistance

    Kim, A Young; Park, Yoon Jeong; Pan, Xuebo; Shin, Kyung Cheul; Kwak, Soo-Heon; Bassas, Abdulelah F.; Sallam, Reem M.; Park, Kyong Soo; Assim A. Alfadda; Xu, Aimin; Kim, Jae Bum

    2015-01-01

    Adiponectin plays a key role in the regulation of the whole-body energy homeostasis by modulating glucose and lipid metabolism. Although obesity-induced reduction of adiponectin expression is primarily ascribed to a transcriptional regulation failure, the underlying mechanisms are largely undefined. Here we show that DNA hypermethylation of a particular region of the adiponectin promoter suppresses adiponectin expression through epigenetic control and, in turn, exacerbates metabolic diseases ...

  15. Maternal and Cord Blood Adiponectin Multimeric Forms in Gestational Diabetes Mellitus

    Ballesteros, Mónica; Simón, Inmaculada; Vendrell, Joan; Ceperuelo-Mallafré, Victoria; Miralles, Ramon M.; Albaiges, Gerard; Tinahones, Francisco; Megia, Ana

    2011-01-01

    OBJECTIVE To analyze the relationship between maternal adiponectin (mAdiponectin) and cord blood adiponectin (cbAdiponectin) multimeric forms (high molecular weight [HMW], medium molecular weight [MMW], and low molecular weight [LMW]) in a cohort of gestational diabetes mellitus (GDM) and normal glucose–tolerant (NGT) pregnant women. RESEARCH DESIGN AND METHODS A total of 212 women with a singleton pregnancy, 132 with NGT and 80 with GDM, and their offspring were studied. Maternal blood was o...

  16. The relationship between adiponectin, ageing and renal function in a bi-ethnic sample

    Huisman, Hugo Willem; Kruger, Iolanthe Marike; Schutte, Aletta Elisabeth

    2011-01-01

    Ageing is associated with elevated adiponectin levels. Our aim was to assess whether age-related increase in adiponectin is associated with a decrease in renal function. The study comprised African (N = 277) and Caucasian (N = 326) men and women. Adiponectin levels, estimated creatinine clearance rate and obesity indices were determined. African men revealed significantly higher adiponectin levels compared to Caucasian men (p < 0.01), reflecting the lower adiposity levels of the African men. ...

  17. In utero gender dimorphism of adiponectin reflects insulin sensitivity and adiposity of the fetus

    Basu, S; Laffineuse, L.; Presley, L.; Minium, J; Catalano, PM; Hauguel-de Mouzon, S.

    2009-01-01

    Circulating adiponectin reflects the degree of energy homeostasis and insulin sensitivity of adult individuals. Low abundance of the high molecular mass multimers (HMW), the most active forms mediating the insulin-sensitizing effects of adiponectin, is indicative of impaired metabolic status. The increase in fetal adiponectin HMW compared with adults is a distinctive features of human neonates. In order to further understand the functional properties of adiponectin during fetal life, we have ...

  18. Adiponectin downregulation is associated with volume overload-induced myocyte dysfunction in rats

    Wang, Li-li; Miller, Dori; Wanders, Desiree; Nanayakkara, Gayani; Amin, Rajesh; Judd, Robert; Morrison, Edward E.; Zhong, Ju-ming

    2015-01-01

    Aim: Adiponectin has been reported to exert protective effects during pathological ventricular remodeling, but the role of adiponectin in volume overload-induced heart failure remains unclear. In this study we investigated the effect of adiponectin on cardiac myocyte contractile dysfunction following volume overload in rats. Methods: Volume overload was surgically induced in rats by infrarenal aorta-vena cava fistula. The rats were intravenously administered adenoviral adiponectin at 2-, 6- a...

  19. Induction of Chemokine Expression by Adiponectin In Vitro is Isoform-Dependent

    Song, Huijuan; Chan, James; Rovin, Brad H.

    2009-01-01

    Adiponectin is reported to have both pro- and anti-inflammatory effects. Because adiponectin circulates in isoforms of various sizes, and some responses to adiponectin are isoform-dependent, it was postulated that the pro-inflammatory effects of adiponectin may isoform-specific. To test this, peripheral blood mononuclear cells (PBMC), microvascular endothelial cells (MVEC), and human glomerular mesangial cells (HMC) were treated with high or low molecular weight (HMW, LMW) recombinant human a...

  20. Adiponectin and Leptin are Secreted Through Distinct Trafficking Pathways in Adipocytes

    Xie, Linglin; O'Reilly, Cormac P.; Chapes, Stephen K.; Mora, Silvia

    2008-01-01

    Adiponectin and leptin are two adipokines secreted by white adipose tissue that regulate insulin sensitivity. Previously we reported that adiponectin but not leptin release depends on GGA-coated vesicle formation, suggesting that leptin and adiponectin may follow different secretory routes. Here we have examined the intracellular trafficking pathways that lead to the secretion of these two hormones. While adiponectin and leptin displayed distinct localization in the steady-state, treatment of...

  1. Adiponectin Depolarizes Parvocellular Paraventricular Nucleus Neurons Controlling Neuroendocrine and Autonomic Function

    Hoyda, Ted Donald; Samson, Willis Kendrick; Ferguson, Alastair Victor

    2008-01-01

    Adiponectin plays important roles in the control of energy homeostasis and autonomic function through peripheral and central nervous system actions. The paraventricular nucleus (PVN) of the hypothalamus is a primary site of neuroendocrine (NE) and autonomic integration, and, thus, a potential target for adiponectin actions. Here, we investigate actions of adiponectin on parvocellular PVN neurons. Adiponectin influenced the majority (65%) of parvocellular PVN neurons, depolarizing 47%, whereas...

  2. Vascular smooth muscle cell-derived adiponectin: a paracrine regulator of contractile phenotype

    Ding, Min; Carrao, Ana Catarina; Wagner, Robert J.; Xie, Yi; Jin, Yu; Rzucidlo, Eva M.; Yu, Jun; Li, Wei; Tellides, George; Hwa, John; Aprahamian, Tamar R.; Martin, Kathleen A.

    2011-01-01

    Adiponectin is a cardioprotective adipokine derived predominantly from visceral fat. We recently demonstrated that exogenous adiponectin induces vascular smooth muscle cell (VSMC) differentiation via repression of mTORC1 and FoxO4. Here we report for the first time that VSMC express and secrete adiponectin, which acts in an autocrine and paracrine manner to regulate VSMC contractile phenotype. Adiponectin was found to be expressed in human coronary artery and mouse aortic VSMC. Importantly, s...

  3. Evidence that adiponectin receptor 1 activation exacerbates ischemic neuronal death

    Thundyil John

    2010-08-01

    Full Text Available Abstract Background- Adiponectin is a hormone produced in and released from adipose cells, which has been shown to have anti-diabetic and anti-inflammatory actions in peripheral cells. Two cell surface adiponectin receptors (ADRs mediate the majority of the known biological actions of adiponectin. Thus far, ADR expression in the brain has been demonstrated in the arcuate and the paraventricular nucleus of hypothalamus, where its activation affects food intake. Recent findings suggest that levels of circulating adiponectin increase after an ischemic stroke, but the role of adiponectin receptor activation in stroke pathogenesis and its functional outcome is unclear. Methods- Ischemic stroke was induced in C57BL/6 mice by middle cerebral artery occlusion (MCAO for 1 h, followed by reperfusion. Primary cortical neuronal cultures were established from individual embryonic neocortex. For glucose deprivation (GD, cultured neurons were incubated in glucose-free Locke's medium for 6, 12 or 24 h. For combined oxygen and glucose deprivation (OGD, neurons were incubated in glucose-free Locke's medium in an oxygen-free chamber with 95% N2/5% CO2 atmosphere for either 3, 6, 9, 12 or 24 h. Primary neurons and brain tissues were analysed for Adiponectin and ADRs using reverse transcriptase polymerase chain reaction (RT-PCR, immunoblot and immunochemistry methods. Results- Cortical neurons express ADR1 and ADR2, and that the levels of ADR1 are increased in neurons in response to in vitro or in vivo ischemic conditions. Neurons treated with either globular or trimeric adiponectin exhibited increased vulnerability to oxygen and glucose deprivation which was associated with increased activation of a pro-apoptotic signaling cascade involving p38 mitogen-activated protein kinase (p38MAPK and AMP-activated protein kinase (AMPK. Conclusions- This study reveals a novel pathogenic role for adiponectin and adiponectin receptor activation in ischemic stroke. We show that

  4. Adiponectin Ameliorates Endotoxin-Induced Acute Cardiac Injury

    Yoshio Watanabe

    2014-01-01

    Full Text Available Background. Obesity is a risk factor for cardiovascular disease. Increasing evidence suggests that reduced levels of the adipocyte-derived plasma protein adiponectin are associated with an increased cardiovascular risk. Here, we examined the effects of adiponectin on lipopolysaccharide- (LPS- induced acute cardiac injury in vivo. Methods and Results. A single dose of LPS (10 mg/kg was intraperitoneally injected into wild-type (WT and adiponectin-knockout (APN-KO mice. Following LPS administration, APN-KO mice had exacerbation of left ventricular (LV systolic dysfunction compared with WT mice. Administration of LPS to WT and APN-KO mice led to an increased expression of inflammatory cytokines including TNF-α and IL-6 in the heart, but the magnitude of this induction was greater in APN-KO mice compared to WT mice. Systemic delivery of an adenoviral vector expressing adiponectin (Ad-APN improved LPS-induced LV dysfunction in APN-KO mice, and this effect was accompanied by the reduced expression of TNF-α and IL-6 in the heart. Administration of etanercept, a soluble TNF receptor abolished the reduced LV contractile function in response to LPS in APN-KO mice. Conclusion. These results suggest that adiponectin protects against LPS-induced acute cardiac injury by suppressing cardiac inflammatory responses, and could represent a potential therapeutic target in sepsis-associated myocardial dysfunction.

  5. A 7-d exercise program increases high-molecular weight adiponectin in obese adults

    Kelly, Karen R; Blaszczak, Alecia; Haus, Jacob M;

    2012-01-01

    High-molecular weight (HMW) adiponectin is the biologically active form of adiponectin and is related to enhanced insulin sensitivity and metabolic function. Previously, we found that 7 d of exercise improves insulin sensitivity in obese subjects; however, whether short-term exercise training...... affects HMW adiponectin in obese persons is unknown....

  6. Circadian expression of adiponectin and its receptors in human adipose tissue

    Adiponectin is one of the most clinically relevant cytokines associated with obesity. However, circadian rhythmicity of adiponectin in human adipose tissue (AT) has not been analyzed. To assess whether the mRNA levels of adiponectin and its receptors (ADIPOR1 and ADIPOR2) might show daily circadian ...

  7. Gene Expression of Adiponectin and Adiponectin Receptor 1 in Type 2 Diabetic Rats and the Relationship with the Parameters of Glucose and Lipid Metabolism

    YAO Hui; LING Hanhua; WANG Hongwei; ZHANG Longjiang; HUANG Xiaoyan; XIA Zhi

    2005-01-01

    Summary: In order to confirm whether the mRNA levels of adiponectin in adipose tissue and mRNA levels of AdipoR1 in the skeletal muscles were correlated with the serum parameters of glucose and lipid metabolism and to clarify the regulation of adiponectin receptor gene expression in diabetic states, serum adiponectin, mRNA levels of adiponectin in adipose tissue and mRNA levels of AdipoR1 in the skeletal muscles were examined in type 2 diabetic rats. The model of type 2 diabetes was prepared by feeding high fat diet and injecting low dosage of streptozotocin (STZ). The diabetic rats were screened out by oral glucose tolerance test. One group of type 2 diabetic rats received rosiglitazone. The serum adiponectin concentration was detected by using ELISA and mRNA levels were examined by RT-PCR. The serum adiponectin levels and mRNA levels of adiponectin in adipose tissue of type 2 diabetic rats were significantly decreased as compared with the normal control rats (P<0.05, P<0.01 respectively). No siglificant changes were observed in the expression of adiponectin receptor 1 in the skeletal muscle of type 2 diabetic rats. The mRNA levels of adiponectin in adipose tissue were reversely correlated with serum insulin (r=-0.66, P<0.05), triglyceride (r=-0.58, P<0.05), cholesterol (r=-0.49, P<0.05), interleukin-6 (r=-0.49, P<0.05) and tumor necrosis factor (r=-0.43, P<0.05). The expression of adiponectin receptors was not altered in the skeletal muscle of Type 2 diabetic rats. The decreased serum adiponectin was caused by the decreased expression of adiponectin mRNA in adipose tissue rather than the adiponectin receptors in the skeletal muscle, which could be improved by rosiglitazone.

  8. Variants in the Adiponectin Gene and Serum Adiponectin: The Coronary Artery Development in Young Adults (CARDIA) Study

    Wassel, Christina L.; Pankow, James S.; Jacobs, David R.; Steffes, Michael W.; Li, Na; Schreiner, Pamela J.

    2016-01-01

    Circulating adiponectin is involved in the atherosclerotic process and has been associated with cardiovascular disease as well as obesity, insulin resistance, metabolic syndrome, and type 2 diabetes. The adiponectin gene (ADIPOQ) encodes the circulating protein adiponectin and affects its expression. Only a small proportion of all known ADIPOQ polymorphisms have been investigated in relation to circulating adiponectin concentrations. Using data from 3,355 African-American and white men and women aged 33–45 at the year 15 examination from the Coronary Artery Development in Young Adults (CARDIA) Study the association between 10 single-nucleotide polymorphisms (SNPs) within ADIPOQ and serum adiponectin was examined using linear regression. SNPs were chosen based on a tagSNP approach. Models were stratified by self-reported race to control for population stratification, and Bonferroni corrected for multiple comparisons. ADIPOQ SNPs rs17300539 (P Significant interactions were found between waist and rs182052 (P = 0.0029) and between rs9882505 and smoking (P = 0.001) in whites. Many ADIPOQ SNPs have not yet been examined, and additional studies are needed to determine whether these may be functional variants. PMID:20395949

  9. The Study on the Correlation Between Plasma Adiponectin Level and Coronary Heart Disease

    Zhang Jinguo; Yang Na; Wang Xuezhong; Song Guangyao; Gao Dongsheng; Wei Guanghe; He Hua

    2005-01-01

    Objectives To investigate the relationship between plasma adiponectin level and coronary heart disease (CHD), and some established cardiovascular risk factors and to probe its probable pathogenesis which adiponectin results in CHD.Methods The levels of plasma adiponectin, fasting plasma insulin (FINS), C-reactive protein (CRP) and P-selectin were measured by ELISA, plasma ET-1 was measured by radioimmunoassay (RIA) in 75 male patients with CHD and 30 healthy male people. Body mass index (BMI), waist / hip ratio (WHR) and insulin resistance index (Homa-IR) were calculated respectively. Results (1)The plasma adiponectin levels in CHD group were lower compared with control group[ (5.18±2.57)mg / L vs(8.94±2.59)mg / L, P<0.001 ], there was no significant difference of plasma adiponectin levels in CHD sub-groups (P > 0.05). (2)Based on multinominal stepwise logistic regression analysis, adiponectin was one of significant and independent risk factors for CHD. (3) Multivariate liner stepwise regression analysis showed that adiponectin had significant correlation with BMI and TG, BMI and TG were independent factors influencing on plasma adiponectin levels. (4) Pearson correlation analysis indicated plasma adiponectin levels were inversely related to FINS levels , Homa-IR, CRP, P-selectin and ET-1. Conclusions (1)Plasma adiponectin levels are lower in CHD patients compared the control subjects. there are no significant difference of plasma adiponectin levels in patients with SAP, UAP and AMI. (2) Plasma adiponectin levels are relative with CHD. Hypoadiponectinemia is an independent risk factor for CHD. (3)Established cardiovascular risk factors such as BMI and TG have an obvious influence on adiponectin. (4)The probable pathogenesis by which adiponectin involves in CHD is suggested that adiponectin relates to insulin resistance, inflammatory reaction and dysfunction of vessel endothelium.

  10. Adipokines (adiponectin and plasminogen activator inhhibitor-1 in metabolic syndrome

    M K Garg

    2012-01-01

    Full Text Available Background: The clustering of cardiovascular risk factors is termed the metabolic syndrome (MS, which strongly predicts the risk of diabetes and cardiovascular disease (CVD. Adipokines may contribute to the development of obesity and insulin resistance and may be a causal link between MS, diabetes and CVD. Hence, we studied the adipokines - adiponectin and plasminogen activator inhibitor-1 (PAI-1 - in subjects with MS. Materials and Methods: We studied 50 subjects with MS diagnosed by International Diabetes Federation (IDF criteria and 24 healthy age- and sex-matched controls. Clinical evaluation included anthropometry, body fat analysis by bioimpedance, highly sensitive C-reactive protein, insulin, adiponectin, and PAI-1 measurement. Results: Subjects with MS had lower adiponectin (4.01 ± 2.24 vs. 8.7 ± 1.77 μg/ml; P < 0.0001 and higher PAI-1 (53.85 ± 16.45 vs. 17.35 ± 4.45 ng/ml; P < 0.0001 levels than controls. Both were related with the number of metabolic abnormalities. Adiponectin was negatively and PAI-1 was positively associated with body mass index, waist hip ratio (WHR, body fat mass, percent body fat, and all the parameters of MS, except HDL where the pattern reversed. WHR and triglycerides were independent predictors of adipokines in multiple regression analysis. Receiver operating characteristic curve analysis showed that adiponectin (6.7 μg/ml and PAI-1 (25.0 ng/ml levels predicted the MS with high sensitivity, specificity and accuracy in Indian population. Conclusions: Subjects with MS have lower adiponectin and higher PAI-1 levels compared to healthy controls. Lifestyle measures have been shown to improve the various components of MS, and hence there is an urgent need for public health measures to prevent the ongoing epidemic of diabetes and CVD.

  11. Development of second generation peptides modulating cellular adiponectin receptor responses

    Otvos, Laszlo; Knappe, Daniel; Hoffmann, Ralf; Kovalszky, Ilona; Olah, Julia; Hewitson, Tim; Stawikowska, Roma; Stawikowski, Maciej; Cudic, Predrag; Lin, Feng; Wade, John; Surmacz, Eva; Lovas, Sandor

    2014-10-01

    The adipose tissue participates in the regulation of energy homeostasis as an important endocrine organ that secretes a number of biologically active adipokines, including adiponectin. Recently we developed and characterized a first-in-class peptide-based adiponectin receptor agonist by using in vitro and in vivo models of glioblastoma and breast cancer (BC). In the current study, we further explored the effects of peptide ADP355 in additional cellular models and found that ADP355 inhibited chronic myeloid leukemia (CML) cell proliferation and renal myofibroblast differentiation with mid-nanomolar IC50 values. According to molecular modeling calculations, ADP355 was remarkably flexible in the global minimum with a turn present in the middle of the peptide. Considering these structural features of ADP355 and the fact that adiponectin normally circulates as multimeric complexes, we developed and tested the activity of a linear branched dimer (ADP399). The dimer exhibited approximately 20-fold improved cellular activity inhibiting K562 CML and MCF-7 cell growth with high pM - low nM relative IC50 values. Biodistribution studies suggested superior tissue dissemination of both peptides after subcutaneous administration relative to intraperitoneal inoculation. After screening of a 397-member adiponectin active site library, a novel octapeptide (ADP400) was designed that counteracted 10-1000 nM ADP355- and ADP399-mediated effects on CML and BC cell growth at nanomolar concentrations. ADP400 induced mitogenic effects in MCF-7 BC cells perhaps due to antagonizing endogenous adiponectin actions or acting as an inverse agonist. While the linear dimer agonist ADP399 meets pharmacological criteria of a contemporary peptide drug lead, the peptide showing antagonist activity (ADP400) at similar concentrations will be an important target validation tool to study adiponectin functions.

  12. Development of second generation peptides modulating cellular adiponectin receptor responses

    Laszlo eOtvos

    2014-10-01

    Full Text Available The adipose tissue participates in the regulation of energy homeostasis as an important endocrine organ that secretes a number of biologically active adipokines, including adiponectin. Recently we developed and characterized a first-in-class peptide-based adiponectin receptor agonist by using in vitro and in vivo models of glioblastoma and breast cancer (BC. In the current study, we further explored the effects of peptide ADP355 in additional cellular models and found that ADP355 inhibited chronic myeloid leukemia (CML cell proliferation and renal myofibroblast differentiation with mid-nanomolar IC50 values. According to molecular modeling calculations, ADP355 was remarkably flexible in the global minimum with a turn present in the middle of the peptide. Considering these structural features of ADP355 and the fact that adiponectin normally circulates as multimeric complexes, we developed and tested the activity of a linear branched dimer (ADP399. The dimer exhibited approximately 20-fold improved cellular activity inhibiting K562 CML and MCF-7 cell growth with high pM - low nM relative IC50 values. Biodistribution studies suggested superior tissue dissemination of both peptides after subcutaneous administration relative to intraperitoneal inoculation. After screening of a 397-member adiponectin active site library, a novel octapeptide (ADP400 was designed that counteracted 10-1000 nM ADP355- and ADP399-mediated effects on CML and BC cell growth at nanomolar concentrations. ADP400 induced mitogenic effects in MCF-7 BC cells perhaps due to antagonizing endogenous adiponectin actions or acting as an inverse agonist. While the linear dimer agonist ADP399 meets pharmacological criteria of a contemporary peptide drug lead, the peptide showing antagonist activity (ADP400 at similar concentrations will be an important target validation tool to study adiponectin functions.

  13. Testosterone therapy decreases subcutaneous fat and adiponectin in aging men

    Frederiksen, L.; Højlund, K.; Hougaard, D. M.;

    2012-01-01

    -month testosterone therapy did not improve insulin sensitivity. We investigated the effect of testosterone therapy on regional body fat distribution and on the levels of the insulin-sensitizing adipokine, adiponectin, in aging men with low normal bioavailable testosterone levels. DESIGN: A randomized......), visceral adipose tissue (VAT), and thigh subcutaneous fat area (TFA) were measured by magnetic resonance imaging. Adiponectin levels were measured using an in-house immunofluorometric assay. Coefficients (b) represent the placebo-controlled mean effect of intervention. RESULTS: LEFM was decreased (b=–0...

  14. Antidiabetic treatment restores adiponectin serum levels and APPL1 expression, but does not improve adiponectin-induced vasodilation and endothelial dysfunction in Zucker diabetic fatty rats

    Schmid, Peter M.; Resch, Markus; Schach, Christian; Birner, Christoph; Günter A J Riegger; Luchner, Andreas; Endemann, Dierk H.

    2013-01-01

    Background Adiponectin is able to induce NO-dependent vasodilation in Zucker lean (ZL) rats, but this effect is clearly alleviated in their diabetic littermates, the Zucker diabetic fatty (ZDF) rats. ZDF rats also exhibit hypoadiponectinemia and a suppressed expression of APPL1, an adaptor protein of the adiponectin receptors, in mesenteric resistance arteries. Whether an antidiabetic treatment can restore the vasodilatory effect of adiponectin and improve endothelial function in diabetes mel...

  15. Adiponectin and peak bone mass in men: a cross-sectional, population-based study

    Nielsen, Morten Frost; Abrahamsen, B; Nielsen, T L;

    2010-01-01

    Adiponectin, a protein classically known to be secreted by adipocytes, is also secreted by bone-forming cells. Results of previous studies have been contradictory as to whether serum adiponectin and bone mineral density (BMD) are associated. The aim of this study was to investigate a possible...... of femoral cortical thickness and bone marrow size was performed in a subsample of 363 participants. The associations between serum adiponectin and various bone measures were investigated by means of regression analyses with adjustment for potential confounding variables. An inverse association was...... found between serum adiponectin and total hip BMD and a direct between adiponectin and femoral bone marrow size (r = -0.092; P = 0.036 and r = 0.164; P = 0.003, respectively). Femoral muscle size may, at least in part, explain the association between adiponectin and total hip BMD. Serum adiponectin was...

  16. Glucose level determines excitatory or inhibitory effects of adiponectin on arcuate POMC neuron activity and feeding

    Suyama, Shigetomo; Maekawa, Fumihiko; Maejima, Yuko; Kubota, Naoto; Kadowaki, Takashi; Yada, Toshihiko

    2016-01-01

    Adiponectin regulates glucose and lipid metabolism, acting against metabolic syndrome and atherosclerosis. Accumulating evidence suggest that adiponectin acts on the brain including hypothalamic arcuate nucleus (ARC), where proopiomelanocortin (POMC) neurons play key roles in feeding regulation. Several studies have examined intracerebroventricular (ICV) injection of adiponectin and reported opposite effects, increase or decrease of food intake. These reports used different nutritional states. The present study aimed to clarify whether adiponectin exerts distinct effects on food intake and ARC POMC neurons depending on the glucose concentration. Adiponectin was ICV injected with or without glucose for feeding experiments and administered to ARC slices with high or low glucose for patch clamp experiments. We found that adiponectin at high glucose inhibited POMC neurons and increased food intake while at low glucose it exerted opposite effects. The results demonstrate that glucose level determines excitatory or inhibitory effects of adiponectin on arcuate POMC neuron activity and feeding. PMID:27503800

  17. Glucose level determines excitatory or inhibitory effects of adiponectin on arcuate POMC neuron activity and feeding.

    Suyama, Shigetomo; Maekawa, Fumihiko; Maejima, Yuko; Kubota, Naoto; Kadowaki, Takashi; Yada, Toshihiko

    2016-01-01

    Adiponectin regulates glucose and lipid metabolism, acting against metabolic syndrome and atherosclerosis. Accumulating evidence suggest that adiponectin acts on the brain including hypothalamic arcuate nucleus (ARC), where proopiomelanocortin (POMC) neurons play key roles in feeding regulation. Several studies have examined intracerebroventricular (ICV) injection of adiponectin and reported opposite effects, increase or decrease of food intake. These reports used different nutritional states. The present study aimed to clarify whether adiponectin exerts distinct effects on food intake and ARC POMC neurons depending on the glucose concentration. Adiponectin was ICV injected with or without glucose for feeding experiments and administered to ARC slices with high or low glucose for patch clamp experiments. We found that adiponectin at high glucose inhibited POMC neurons and increased food intake while at low glucose it exerted opposite effects. The results demonstrate that glucose level determines excitatory or inhibitory effects of adiponectin on arcuate POMC neuron activity and feeding. PMID:27503800

  18. T-cadherin is a receptor for hexameric and high-molecular-weight forms of Acrp30/adiponectin

    Hug, Christopher; Wang, Jin; Ahmad, Naina Shehzeen; Bogan, Jonathan S.; Tsao, Tsu-Shuen; Lodish, Harvey F.

    2004-01-01

    Acrp30/adiponectin is reduced in the serum of obese and diabetic individuals, and the genetic locus of adiponectin is linked to the metabolic syndrome. Recombinant adiponectin, administered to diet-induced obese mice, induced weight loss and improved insulin sensitivity. In muscle and liver, adiponectin stimulates AMP-activated protein kinase activation and fatty acid oxidation. To expression-clone molecules capable of binding adiponectin, we transduced a C2C12 myoblast cDNA retroviral expres...

  19. Short-term overfeeding increases circulating adiponectin independent of obesity status.

    Farrell Cahill

    Full Text Available BACKGROUND: Adiponectin is an adipose tissue derived hormone which strengthens insulin sensitivity. However, there is little data available regarding the influence of a positive energy challenge (PEC on circulating adiponectin and the role of obesity status on this response. OBJECTIVE: The purpose of this study was to investigate how circulating adiponectin will respond to a short-term PEC and whether or not this response will differ among normal-weight(NW, overweight(OW and obese(OB. DESIGN: We examined adiponectin among 64 young men (19-29 yr before and after a 7-day overfeeding (70% above normal energy requirements. The relationship between adiponectin and obesity related phenotypes including; weight, percent body fat (%BF, percent trunk fat (%TF, percent android fat (%AF, body mass index (BMI, total cholesterol, HDLc, LDLc, glucose, insulin, homeostatic model assessment insulin resistance (HOMA-IR and β-cell function (HOMA-β were analyzed before and after overfeeding. RESULTS: Analysis of variance (ANOVA and partial correlations were used to compute the effect of overfeeding on adiponectin and its association with adiposity measurements, respectively. Circulating Adiponectin levels significantly increased after the 7-day overfeeding in all three adiposity groups. Moreover, adiponectin at baseline was not significantly different among NW, OW and OB subjects defined by either %BF or BMI. Baseline adiponectin was negatively correlated with weight and BMI for the entire cohort and %TF, glucose, insulin and HOMA-IR in OB. However, after controlling for insulin resistance the correlation of adiponectin with weight, BMI and %TF were nullified. CONCLUSION: Our study provides evidence that the protective response of adiponectin is preserved during a PEC regardless of adiposity. Baseline adiponectin level is not directly associated with obesity status and weight gain in response to short-term overfeeding. However, the significant increase of

  20. Influence of androgens on circulating adiponectin in male and female rodents.

    Joshua F Yarrow

    Full Text Available Several endocrine factors, including sex-steroid hormones are known to influence adiponectin secretion. Our purpose was to evaluate the influence of testosterone and of the synthetic non-aromatizable/non-5α reducible androgen 17β-hydroxyestra-4,9,11-trien-3-one (trenbolone on circulating adiponectin and adiponectin protein expression within visceral fat. Young male and female F344 rats underwent sham surgery (SHAM, gonadectomy (GX, or GX plus supraphysiologic testosterone-enanthate (TE administration. Total circulating adiponectin was 39% higher in intact SHAM females than SHAM males (p<0.05. GX increased total adiponectin by 29-34% in both sexes (p<0.05, while TE reduced adiponectin to concentrations that were 46-53% below respective SHAMs (p≤0.001 and ablated the difference in adiponectin between sexes. No differences in high molecular weight (HMW adiponectin were observed between sexes or treatments. Adiponectin concentrations were highly and negatively associated with serum testosterone (males: r = -0.746 and females: r = -0.742, p≤0.001; however, no association was present between adiponectin and estradiol. In separate experiments, trenbolone-enanthate (TREN prevented the GX-induced increase in serum adiponectin (p≤0.001 in young animals, with Low-dose TREN restoring adiponectin to the level of SHAMs and higher doses of TREN reducing adiponectin to below SHAM concentrations (p≤0.001. Similarly, TREN reduced adiponectin protein expression within visceral fat (p<0.05. In adult GX males, Low-dose TREN also reduced total adiponectin and visceral fat mass to a similar magnitude as TE, while increasing serum HMW adiponectin above SHAM and GX animals (p<0.05. Serum adiponectin was positively associated with visceral fat mass in young (r = 0.596, p≤0.001 and adult animals (r = 0.657, p≤0.001. Our results indicate that androgens reduce circulating total adiponectin concentrations in a dose-dependent manner, while maintaining HMW

  1. Association of single nucleotide polymorphism at position 45 in adiponectin gene with plasma adiponectin level and insulin resistance in obesity

    Objective: To explore the association of single nucleotide polymorphism at position 45 (SNP45) in adiponectin gene with plasma adiponectin level and insulin resistance in obesity in Quanzhou area of Fujian province. Methods: Two hundred and forty-eight patients with obesity and 225 normal control subjects were enrolled in this study.Fasting insulin (FINS) were measured by radioimmunoassay and fasting plasma glucose (FPG), total cholesterol (TC), triglyceride (TG), high density lipoprotein-cholesterol (HDL-C), low density lipoprotein-cholesterol (LDL-C) were measured by BECKMAN DXC800 biochemistry analyzer. Body mass index (BMI), waist to hip ratio,homeostasis model assessment of insulin resistance (HOMA-IR) were calculated. Plasma adiponectin levels were examined by means of enzyme-linked immunosorbentassy. The adiponectin gene SNP45 was identified by PCR-restriction fragment length polymorphism. Results: (1) Frequencies of GG+GT genotype in obesity group and normal control group were 61% and 44% respectively (χ2=14.182, P<0.01), and G allele frequencies were 35% and 25% (χ2=10.708, P<0.01). (2) In obesity group,the subjects with SNP45 GG+GT genotype had higher TG and LDL-C levels than those with TT genotype (t=2.604, P<0.01; t=5.507, P<0.01), and had lower adiponectin level than those with TT genotype (t=2.275, P<0.05), and had significantly lower HDL-L level than those with TT genotype (t=10.100, P< 0.01). (3) In normal control group,the subjects with SNP45 GG +GT genotype had significantly lower adiponectin,TG,TC levels than those with TT genotype (t=2.510, P<0.05; t=2.922, P<0.01; t=3.272, P< 0.01). (4) Logistic analysis proved that the SNP45 GG+GT genotype in obesity group was associated with decreased risk of plasma adiponectin level (OR=0.810, 95% CI : 0.673-0.975, P<0.05), and with increased risk of HOMA-IR (OR=1.746, 95% CI : 1.060-2.875, P<0.05). The SNP45 GG+GT genotype in normal control group was associated with increased risk of HOMA-IR (OR=3.962, 95

  2. Augmented Plasma Adiponectin after Prolonged Fasting During Ramadan in Men

    Sadegh Feizollahzadeh

    2014-07-01

    Full Text Available Background: Intermittent fasting during Ramadan entails major changes in metabolism and energy expenditure. This study sought to determine effect of the Ramadan fasting on serum levels of adiponectin and tumor necrosis factor-α (TNF-α as two inter-related peptides involved in cells sensitivity to insulin and glucose metabolism. Methods: Total of seventy healthy men, with age range equal or greater than 30, with at least three type2 diabetes mellitus (DM risk factors were selected. Serum lipid profile, anthropometric indices and plasma glucose levels were determined using conventional methods. Also, serum adiponectin and TNF- α concentrations were assessed using Enzyme-linked Immunosorbent Assay. Data were analyzed by paired t-test. Results: Ramadan fasting resulted in a significant increase of serum adiponectin (P< 0.000, fasting glucose (P< 0.000 and triglycride (P< 0.001. Body mass index was lowered during the fasting (P< 0.000. Finally, no remarkable decrease was found in serum TNF-α levels (P= 0.100. Conclusion: Ramadan fasting resulted in augmented adiponectin levels which may help in improving metabolic stress induced by insulin resistance in men with predisposing factors of type2 DM.

  3. Crosstalk between adiponectin and IGF-IR in breast cancer

    Loredana eMauro

    2015-07-01

    Full Text Available Obesity is a chronic and multifactorial disorder that is reaching epidemic proportions. It is characterized by an enlarged mass of adipose tissue caused by a combination of size increase of preexisting adipocytes (hypertrophy and de novo adipocyte differentiation (hyperplasia. Obesity is related to many metabolic disorders like hypertension, type 2 diabetes, metabolic syndrome, cardiovascular disease, and it is associated with an increased risk of cancer development in different tissues including breast. Adipose tissue is now regarded as not just a storage reservoir for excess energy, but rather as an endocrine organ, secreting a large number of bioactive molecules called adipokines. Among these, adiponectin represents the most abundant adipose tissue-excreted protein, which exhibits insulin-sensitizing, anti-inflammatory and antiatherogenic properties. The serum concentrations of adiponectin are inversely correlated with body mass index. Recently, low levels of plasma adiponectin have been associated with an increased risk for obesity-related cancers and development of more aggressive phenotype, concomitantly with alterations in the bioavailability of Insulin-like Growth Factor-I (IGF-I and IGF-I Receptor (IGF-IR signaling pathways. In this review we discuss the cross-talk between adiponectin/AdipoR1 and IGF-I/IGF-IR in breast cancer.

  4. Elevated Adiponectin Serum Levels in Women with Systemic Autoimmune Diseases

    Éric Toussirot

    2010-01-01

    Full Text Available Adipose tissue produces a wide range of proteins that may influence the immune system. In this study, we assessed the serum levels of leptin, adiponectin, and ghrelin, in association with the measurements of body composition, in 15 female patients with various autoimmune diseases (systemic lupus erythematosus, primary Sjögren's syndrome, sarcoidosis, mixed connective tissue disease, vasculitis, CREST syndrome, and polymyositis and in 15 healthy female controls. There were no statistically significant differences between the patients and controls with regard to serum leptin, serum ghrelin, global fat mass, adiposity, and fat mass in the android or gynoid regions, whereas serum adiponectin levels were higher in patients than controls (16.3±1.6 μg/mL versus 9.7±0.6 μg/mL; =.01. As adiponectin is known to exhibit potent anti-inflammatory properties, a high adiponectinemia in patients with systemic autoimmune disease may mitigate the inflammatory response. However, the precise consequences of these elevated serum adiponectin levels on the metabolic syndrome development and atherosclerotic cardiovascular risk in this patient population still needs to be determined.

  5. ASSOCIATION BETWEEN ADIPONECTIN, INSULIN RESISTANCE, AND ENDOMETRIAL CANCER

    BACKGROUND: Obesity is a well-known risk factor for the development of endometrial cancer; however, weight alone does not account for all cases. The authors hypothesized that insulin resistance also contributes to an increased risk for endometrial cancer. Adiponectin is a protein secreted by adipose...

  6. Adiponectin serum level in chronic hepatitis C infection andtherapeutic profile

    Valentina Peta; Carlo Torti; Natasa Milic; Alfredo Focà; Ludovico Abenavoli

    2015-01-01

    Hepatic steatosis is commonly seen in the patients withchronic hepatitis C virus (HCV) infection. HCV is closelyassociated with lipid metabolism, and viral steatosis ismore common in genotype 3 infection owing to a directcytopathic effect of HCV core protein. In non-genotype3 infection, hepatic steatosis is considered largely tobe the result of the alterations in host metabolism;metabolic steatosis is primarily linked with HCV genotype1. Adipose tissue secretes different hormonesinvolved in glucose and lipid metabolisms. It has beendemonstrated that adipocytokines are involved in thepathogenesis of non-alcoholic fatty liver disease, as thedecreased plasma adiponectin levels, a soluble matrixprotein expressed by adipoctyes and hepatocyte, areassociated with liver steatosis. Various studies haveshown that steatosis is strongly correlated negativelywith adiponectin in the patients with HCV infection.The role of adiponectin in hepatitis C virus inducedsteatosis is still not completely understood, but therelationship between adiponectin low levels and liversteatosis is probably due to the ability of adiponectinto protect hepatocytes from triglyceride accumulationby increasing β-oxidation of free fatty acid and thusdecreasing de novo free fatty acid production.

  7. Study the relationship between adiponectin and coronary heart disease

    Xue-Hui Yang; Li-Xin Zhao; Yan-Hong Lu; Xiao-Jun Li; Jun Shi

    2015-01-01

    Objective: To study whether adiponectin in serum of patients with coronary heart disease is reduced, and compare with the test results in total cholesterol (TC), Triglyceride (TG), high density lipoprotein cholesterol (HDL-C), low density lipoprotein cholesterol (LDL-C), blood glucose (GLU), C-reactive protein (CRP). Method: We selected 80 cases of coronary heart disease patients as the experimental group, 50 healthy subjects as control group. The coronary heart disease group compared with the control group, we know the changes of adiponectin in coronary heart disease group and compared coronary heart disease group with control group in test results of blood lipid, blood glucose, C-reactive protein. Results: Adiponectin in coronary heart disease group was (0.47±0.09) mg/L, which decreased significantly comparing to control group’s level (t=-18.4, P<0.001), HDL-C in coronary heart disease group was (1.24±0.04) mmol/L, which decreased significantly comparing to control group’s level (t=-27.67, P<0.001). The difference was statistically significant (P<0.05). Conclusion: The level’s adiponectin in patients of coronary heart disease dropped, which lead to hypoadiponectinemia, Hypoadiponectinemia may be one of the risk factors of coronary heart disease.

  8. Fetuin-A induces cytokine expression and suppresses adiponectin production.

    Anita M Hennige

    Full Text Available BACKGROUND: The secreted liver protein fetuin-A (AHSG is up-regulated in hepatic steatosis and the metabolic syndrome. These states are strongly associated with low-grade inflammation and hypoadiponectinemia. We, therefore, hypothesized that fetuin-A may play a role in the regulation of cytokine expression, the modulation of adipose tissue expression and plasma concentration of the insulin-sensitizing and atheroprotective adipokine adiponectin. METHODOLOGY AND PRINCIPAL FINDINGS: Human monocytic THP1 cells and human in vitro differenttiated adipocytes as well as C57BL/6 mice were treated with fetuin-A. mRNA expression of the genes encoding inflammatory cytokines and the adipokine adiponectin (ADIPOQ was assessed by real-time RT-PCR. In 122 subjects, plasma levels of fetuin-A, adiponectin and, in a subgroup, the multimeric forms of adiponectin were determined. Fetuin-A treatment induced TNF and IL1B mRNA expression in THP1 cells (p<0.05. Treatment of mice with fetuin-A, analogously, resulted in a marked increase in adipose tissue Tnf mRNA as well as Il6 expression (27- and 174-fold, respectively. These effects were accompanied by a decrease in adipose tissue Adipoq mRNA expression and lower circulating adiponectin levels (p<0.05, both. Furthermore, fetuin-A repressed ADIPOQ mRNA expression of human in vitro differentiated adipocytes (p<0.02 and induced inflammatory cytokine expression. In humans in plasma, fetuin-A correlated positively with high-sensitivity C-reactive protein, a marker of subclinical inflammation (r = 0.26, p = 0.01, and negatively with total- (r = -0.28, p = 0.02 and, particularly, high molecular weight adiponectin (r = -0.36, p = 0.01. CONCLUSIONS AND SIGNIFICANCE: We provide novel evidence that the secreted liver protein fetuin-A induces low-grade inflammation and represses adiponectin production in animals and in humans. These data suggest an important role of fatty liver in the pathophysiology of insulin resistance and

  9. Short-term lifestyle intervention significantly increases fasting adiponectin and induces a decline in serum adiponectin during oral glucose tolerance test, without changes in insulin resistance

    Krzysztof C. Lewandowski

    2006-09-01

    Full Text Available Introduction: Metabolic syndrome is associated with insulin resistance (IR and low concentrations of adiponectin, an adipocytokine that improves insulin sensitivity and has anti-inflammatory and anti-atherogenic properties. An increase in circulating adiponectin may, therefore, have beneficial effects in terms of reduction of cardiovascular risk. We aimed to establish whether short-term (two-week lifestyle intervention alters serum concentrations of adiponectin, and whether there are changes in adiponectin during oral glucose tolerance test (OGTT. Material and methods: We measured adiponectin levels during 75.0 gram OGTT before and after two weeks of a hospital-based lifestyle modification programme that consisted of hypocaloric diet and moderate exercise in 16 severely obese, non-diabetic subjects (4 males, aged 42.0±14.18 years, BMI 42.65±7.82 kg/m2 (mean ±SD. IR indices were assessed before and after intervention. Results: Exercise and diet programme resulted in a decline of BMI (to 40.21±7.14 kg/m2, p<0.001 and fasting glucose (p=0.002, although without significant improvement in IR. There was, however, a significant rise in fasting adiponectin (from 32.1±13.2 nmol/l to 35.38±11.04 nmol/l, p=0.008. Furthermore, though initially there was no change in serum adiponectin levels during OGTT, there was a significant decline in serum adiponectin during OGTT at the end of the study (p<0.001. Conclusions: A two-week period of lifestyle modification (hypocaloric diet and moderate exercise increases fasting adiponectin and induces a decline in serum adiponectin during OGTT in severely obese subjects. Favourable changes in serum adiponectin in subjects at high risk of cardiovascular disease are observed after a relatively short period and precede significant changes in insulin resistance.

  10. Association of Adiponectin Polymorphism with Metabolic Syndrome Risk and Adiponectin Level with Stroke Risk: A Meta-Analysis.

    Yuan, Hui-Ping; Sun, Liang; Li, Xing-Hui; Che, Fu-Gang; Zhu, Xiao-Quan; Yang, Fan; Han, Jing; Jia, Chun-Yuan; Yang, Ze

    2016-01-01

    Many previous studies have provided evidence that the ADIPOQ +45T>G polymorphism (rs2241766) might cause metabolic syndrome (MS). As a cardiovascular manifestation of MS, the incidence of stroke is associated with adiponectin; however, the results remain controversial and inconsistent. Systematic searches of relevant studies published up to Dec 2014 and Jan 2016 on the ADIPOQ +45T>G polymorphism and the risk of MS and adiponectin levels and the risk of stroke, respectively, were conducted in MEDLINE and EMBASE. The odds ratio (OR) or risk ratio (RR) and their 95% confidence interval (95% CI) were extracted. Sixteen studies containing 4,113 MS cases and 3,637 healthy controls indicated a weak positive association between ADIPOQ +45 T>G and MS in the dominant genetic model (OR = 1.30, 95% CI = 1.03-1.65), which was also validated by stratified subgroup analyses. Twelve studies including 26,213 participants and 4,246 stroke cases indicated that 5 μg/ml increments in adiponectin level were not relevant to stroke risk (RR = 1.05, 95% CI = 1.00-1.10, P = 0.069). This study suggested a weak positive association of ADIPOQ +45T>G with MS and a strong association with metabolic-related disease. Additionally, adiponectin level was not a causal factor of increasing stroke risk. PMID:27578536

  11. Carotid intima media thickness is associated with plasma adiponectin but not with the leptin: adiponectin ratio independently of metabolic syndrome

    R.P.F. Dullaart; P.J.W.H. Kappelle; G.M. Dallinga-Thie

    2010-01-01

    Purpose: A recent report showed no benefit of the leptin: adiponectin ratio (L: A ratio) over individual adipokine levels in CHD prediction [ 8]. We determined associations of carotid intima media thickness (IMT) with the L: A ratio taking account of cardiovascular risk factors in a high risk popula

  12. Carotid intima media thickness is associated with plasma adiponectin but not with the leptin : adiponectin ratio independently of metabolic syndrome

    Dullaart, Robin P. F.; Kappelle, Paul J. W. H.; Dallinga-Thie, Geesje M.

    2010-01-01

    Purpose: A recent report showed no benefit of the leptin: adiponectin ratio (L: A ratio) over individual adipokine levels in CHD prediction [ 8]. We determined associations of carotid intima media thickness (IMT) with the L: A ratio taking account of cardiovascular risk factors in a high risk popula

  13. Relation of Adiponectin to Glucose Tolerance Status, Adiposity, and Cardiovascular Risk Factor Load

    N. Wolfson

    2012-01-01

    Full Text Available Objective. Adiponectin has anti-atherogenic and anti-inflammatory properties. We investigated the influence of adiponectin on glucose tolerance status, adiposity and cardiovascular risk factors (CVRFs. Design and Patients. Study consisted of 107 subjects: 55 with normal glucose tolerance (NGT and 52 with impaired glucose regulation (IGR who were divided into two groups: 24 subjects with impaired fasting glucose (IFG Group and 28 patients with type 2 diabetes mellitus (DM Group. In additional analysis, study participants were divided into two groups, according to CVRFs: low and high risk. Measurements: Patients were evaluated for glucose, HbA1C, insulin, lipids, CRP, HOMA-IR and adiponectin. Measurements. Patients were evaluated for glucose, HbA1C, insulin, lipids, CRP, HOMA-IR and adiponectin. Results. Adiponectin was significantly higher in NGT group than in IFG (=0.003 and DM (=0.01 groups. Adiponectin was significantly, positively associated with HDL and inversely associated with glucose, HbA1c, ALT, AST, TG, HOMA-IR. Patients with higher CVRFs load have lesser adiponectin compared to patients with low cardiovascular risk <0.0001. Adiponectin was inversely associated with the number of risk factors (=−0.430, =0.0001. Conclusions. Circulating adiponectin was significantly lower in subjects with different degree of IGR compared to subjects with normal glucose homeostasis. Adiponectin was significantly lower in high risk group than low risk group and decreased concurrently with increased number of CVRFs.

  14. Correlation between Serum Level of Adiponectin and Severity of Coronary Artery Atherosclerosis

    Lei Juan; Zhou Shuxian; Xue Shengneng; Zhang Yuling; Fang Chang; Luo Niansang

    2007-01-01

    Objectives To investigate the correlation between serum level of adiponectin and severity of coronary artery atherosclerosis. Methods Coronary angiographies were performed and serum levels of adiponectin were measured in 88 patients with suspected coronary heart disease (CHD). Patients were divided into groups according to the coronary angiographies and Gensini's scores of coronary artery atherosclerosis. The serum levels of adiponectin were compared in different groups, and multiple regressions were used to analyze the correlation factors of adiponectin. Results ①Serum adiponectin concentration in CHD group [ 7.1 mg/L(2.4 ~21.1 mg/L) ] was decreased as compared with that in control group [ 11.6 mg/L(4.4 ~ 28.2 mg/L),P<0.01 ]; ②The serum levels of adiponectin fell while the Gensini' s scores of coronary artery atherosclerosis increased ( P<0.05, P<0.01 ); ③Serum level of adiponectin was positively correlated with the high-density lipoprotein cholesterol, while negatively correlated with the Gensini' s score of coronary artery atherosclerosis and triglyceride (P<0.01 ). Conclusions Serum adiponectin concentration was decreased in patients with CHD.Low serum levels of adiponectin reflected the severity of coronary artery atherosclerosis. Adiponectin was a protective factor of cardiovascular system.

  15. Conventional kinesin KIF5B mediates adiponectin secretion in 3T3-L1 adipocytes.

    Cui, Ju; Pang, Jing; Lin, Ya-Jun; Jiang, Ping; Gong, Huan; Wang, Zai; Li, Jian; Cai, Jian-Ping; Huang, Jian-Dong; Zhang, Tie-Mei

    2016-08-01

    Insulin stimulates adiponectin secretion and glucose transporter type 4 (GLUT4) translocation in adipocyte to regulate metabolism homeostasis. Similar to GLUT4 translocation, intracellular trafficking and release of adiponectin in adipocytes relies on the trans-Golgi network and endosomal system. Recent studies show that the heavy chain of conventional kinesin (KIF5B) mediates GLUT4 translocation in murine 3T3-L1 adipocytes, however, the motor machinery involved in mediating intracellular trafficking and release of adiponectin is unknown. Here, we examined the role of KIF5B in the regulation of adiponectin secretion. The KIF5B level was up-regulated during 3T3-L1 adipogenesis. This increase in cytosolic KIF5B was synchronized with the induction of adiponectin. Endogenous KIF5B and adiponectin were partially colocalized at the peri-nuclear and cytosolic regions. In addition, adiponectin-containing vesicles were co-immunoprecipitated with KIF5B. Knockdown of KIF5B resulted in a marked inhibition of adiponectin secretion and overexpression of KIF5B enhanced adiponectin release, whereas leptin secretion was not affected by changes in KIF5B expression. These data suggest that the secretion of adiponectin, but not leptin, is dependent on functional KIF5B. PMID:27264953

  16. Disulfide-dependent self-assembly of adiponectin octadecamers from trimers and presence of stable octadecameric adiponectin lacking disulfide bonds in vitro.

    Briggs, David B; Jones, Christopher M; Mashalidis, Ellene H; Nuñez, Martha; Hausrath, Andrew C; Wysocki, Vicki H; Tsao, Tsu-Shuen

    2009-12-29

    Adiponectin is a circulating insulin-sensitizing hormone that homooligomerizes into trimers, hexamers, and higher molecular weight (HMW) species. Low levels of circulating HMW adiponectin appear to increase the risk for insulin resistance. Currently, assembly of adiponectin oligomers and, consequently, mechanisms responsible for decreased HMW adiponectin in insulin resistance are not well understood. In the work reported here, we analyzed the reassembly of the most abundant HMW adiponectin species, the octadecamer, following its collapse to smaller oligomers in vitro. Purified bovine serum adiponectin octadecamer was treated with reducing agents at pH 5 to obtain trimers. These reduced trimers partially and spontaneously reassembled into octadecamers upon oxidative formation of disulfide bonds. Disulfide bonds appear to occupy a greater role in the process of oligomerization than in the structural stabilization of mature octadecamer. Stable octadecamers lacking virtually all disulfide bonds could be observed in abundance using native gel electrophoresis, dynamic light scattering, and collision-induced dissociation nanoelectrospray ionization mass spectrometry. These findings indicate that while disulfide bonds help to maintain the mature octadecameric adiponectin structure, their more important function is to stabilize intermediates during the assembly of octadecamer. Adiponectin oligomerization must proceed through intermediates that are at least partially reduced. Accordingly, fully oxidized adiponectin hexamers failed to reassemble into octadecamers at a rate comparable to that of reduced trimers. As the findings from the present study are based on in vitro experiments, their in vivo relevance remains unclear. Nevertheless, they describe a redox environment-dependent model of adiponectin oligomerization that can be tested using cell-based approaches. PMID:19943704

  17. Relationship Between Serum Adiponectin and Urinary Albumin Excretion Rate in Patients with Diabetes Nephropathy

    To explore the relationship between the levels of serum adiponectin and urinary albumin excretion rate in patients with type 2 diabetes nephropathy, the serum levels of adiponectin and the levels of urinary albumin excretion rate in diabetes patients before and after treatment with pioglitazone were tested by ELISA and automatic biochemical analyzer respectively. The results showed that the serum levels of adiponectin in DM and DN group were lower than that of normal controls(P<0.01), but they gradually increased with progression (P<0.01). The serum adiponectin level was positively correlated with urinary albumin excretion rate (r= 0.284, P<0.05). The urinary albumin level decreased (P<0.01) and the serum levels of adiponectin increased after treatment with pioglitazone in DN group. The serum levels of adiponectin and urinary albumin excretion rate may play important role in the indication of treatment of diabetes. (authors)

  18. Acute exercise increases adipose tissue interstitial adiponectin concentration in healthy overweight and lean subjects

    Højbjerre, Lise; Rosenzweig, Mary; Dela, Flemming;

    2007-01-01

    OBJECTIVE: We studied how an acute bout of exercise influences expression and concentration of adiponectin and regulators of adiponectin in adipose tissue and plasma. DESIGN AND METHODS: Eight overweight and eight lean males were examined by large-pore microdialysis in s.c. abdominal adipose tissue...... increased the SCAAT interstitial adiponectin concentration in both overweight and lean subjects and concentrations did not differ between groups. Plasma adiponectin did not increase during exercise and was similar in overweight and lean subjects. Adiponectin mRNA in SCAAT decreased during exercise and was...... similar in overweight and lean subjects. Surprisingly, the interstitial adiponectin concentration in SCAAT was only 20% of the plasma concentration. SCAAT interleukin-6 (IL-6) microdialyzate and plasma concentrations and SCAAT IL-6 mRNA increased during exercise in both groups. Tumor necrosis factor- (TNF...

  19. Low plasma adiponectin concentrations do not predict weight gain in humans

    Vozarova, Barbora; Stefan, Norbert; Lindsay, Robert S;

    2002-01-01

    Low concentrations of plasma adiponectin, the most abundant adipose-specific protein, are observed in obese individuals and predict the development of type 2 diabetes. Administration of adiponectin to rodents prevented diet-induced weight gain, suggesting a potential etiologic role of...... hypoadiponectinemia in the development of obesity. Our aim was to prospectively examine whether low plasma adiponectin concentrations predict future weight gain in Pima Indians, explaining the predictive effect of adiponectin on the development of type 2 diabetes. We measured plasma adiponectin concentrations in 219...... nondiabetic Pima Indians (112 M/107 F, age 31 +/- 9 years, body weight 96 +/- 20 kg [mean +/- SD]) in whom body weight and height were measured and BMI calculated at baseline and follow-up. Cross-sectionally, plasma adiponectin concentrations were negatively associated with body weight (r = -0.28, P = 0...

  20. Adiponectin Isoforms and Leptin Impact on Rheumatoid Adipose Mesenchymal Stem Cells Function

    Urszula Skalska; Ewa Kontny

    2016-01-01

    Adiponectin and leptin have recently emerged as potential risk factors in rheumatoid arthritis (RA) pathogenesis. In this study we evaluated the effects of adiponectin and leptin on immunomodulatory function of adipose mesenchymal stem cells (ASCs) derived from infrapatellar fat pad of RA patients. ASCs were stimulated with leptin, low molecular weight (LMW) and high/middle molecular weight (HMW/MMW) adiponectin isoforms. The secretory activity of ASCs and their effect on rheumatoid synovial ...

  1. Regulation of adiponectin production by insulin: interactions with tumor necrosis factor-α and interleukin-6

    Hajri, Tahar; Tao, Huan; Wattacheril, Julia; Marks-Shulman, Pamela; Abumrad, Naji N.

    2010-01-01

    Obesity is often associated with insulin resistance, low-grade systemic inflammation, and reduced plasma adiponectin. Inflammation is also increased in adipose tissue, but it is not clear whether the reductions of adiponectin levels are related to dysregulation of insulin activity and/or increased proinflammatory mediators. In this study, we investigated the interactions of insulin, tumor necrosis factor-α (TNF-α) and interleukin 6 (IL-6) in the regulation of adiponectin production using in v...

  2. Physiological, Pharmacological, and Nutritional Regulation of Circulating Adiponectin Concentrations in Humans

    Swarbrick, Michael M.; Peter J Havel

    2008-01-01

    Adiponectin is an adipocyte hormone that links visceral adiposity with insulin resistance and atherosclerosis. It is unique among adipocyte-derived hormones in that its circulating concentrations are inversely proportional to adiposity, and low adiponectin concentrations predict the development of type 2 diabetes and cardiovascular disease. Consequently, in the decade since its discovery, adiponectin has generated immense interest as a potential therapeutic target for the metabolic syndrome a...

  3. The rab11 effector protein FIP1 regulates adiponectin trafficking and secretion.

    Brian P Carson

    Full Text Available Adiponectin is an adipokine secreted by white adipocytes involved in regulating insulin sensitivity in peripheral tissues. Secretion of adiponectin in adipocytes relies on the endosomal system, however, the intracellular machinery involved in mediating adiponectin release is unknown. We have previously reported that intracellular adiponectin partially compartmentalizes with rab 5 and rab11, markers for the early/sorting and recycling compartments respectively. Here we have examined the role of several rab11 downstream effector proteins (rab11 FIPs in regulating adiponectin trafficking and secretion. Overexpression of wild type rab11 FIP1, FIP3 and FIP5 decreased the amount of secreted adiponectin expressed in HEK293 cells, whereas overexpression of rab11 FIP2 or FIP4 had no effect. Furthermore shRNA-mediated depletion of FIP1 enhanced adiponectin release whereas knock down of FIP5 decreased adiponectin secretion. Knock down of FIP3 had no effect. In 3T3L1 adipocytes, endogenous FIP1 co-distributed intracellularly with endogenous adiponectin and FIP1 depletion enhanced adiponectin release without altering insulin-mediated trafficking of the glucose transporter Glut4. While adiponectin receptors internalized with transferrin receptors, there were no differences in transferrin receptor recycling between wild type and FIP1 depleted adipocytes. Consistent with its inhibitory role, FIP1 expression was decreased during adipocyte differentiation, by treatment with thiazolidinediones, and with increased BMI in humans. In contrast, FIP1 expression increased upon exposure of adipocytes to TNFα. In all, our findings identify FIP1 as a novel protein involved in the regulation of adiponectin trafficking and release.

  4. Major components of metabolic syndrome and adiponectin levels: a cross-sectional study

    von Frankenberg, Anize D; do Nascimento, Filipe V; Gatelli, Lucas Eduardo; Nedel, Bárbara L; Garcia, Sheila P; de Oliveira, Carolina SV; Saddi-Rosa, Pedro; Reis, André F; Canani, Luis H; Gerchman, Fernando

    2014-01-01

    Background Adiponectin is a major regulator of glucose and lipid homeostasis by its insulin sensitizer properties. Since decreased insulin sensitivity is linked to metabolic syndrome (MS), decreased adiponectin levels may be related to its development. The purpose of the study was to investigate the relationship between adiponectin levels and MS. Methods Firstly, we cross-sectionally examined subjects with or without MS submitted to an oral glucose tolerance test at Hospital de Clínicas de Po...

  5. Xylitol does not directly affect adiponectin productionand adipogenesis in 3T3-L1 cells

    Pilaiwan Siripurkpong; Sompoch Prajan; Sudawadee Kongkhum

    2014-01-01

    Xylitol is widely used as a low-calorie sweetener in various kinds of food products, including diabetic foods. Adiponectin, secreted by adipocytes, plays a key role in carbohydrate and lipid metabolism. Low levels of plasma adiponectin are associated with cardiovascular disease and type II diabetes. The aims of this study were to determine effects of xylitol on the adipogenesis of pre-adipocytes, adiponectin synthesis and secretion. To assess adipogenesis, pre-adipocyte 3T3-L1 cel...

  6. Adiponectin is a Good Marker for Metabolic State among Type 1 Diabetes Mellitus Patients

    Hamdollah Karamifar; Narges Habibian; Gholamhossein Amirhakimi; Zohre Karamizadeh; Abbas Alipour

    2013-01-01

    Objective: Adiponectin is secreted from adipose tissue. This hormone has a fundamental role in pathogenesis of insulin resistance, and has anti-inflammatory and anti-atherogenic effects. The objectives of this study were to compare serum adiponectin level between type 1 diabetics and healthy people and to assess its related factors, and also to determine the relationship between adiponectin and metabolic state.Methods: This was a case control study involving 60 diabetics (25 good and 35 poor ...

  7. Up-regulation of the anti-inflammatory adipokine adiponectin in acute liver failure in mice

    Wolf, A.M.; Wolf, D; M.A. Avila; Moschen, A R; Berasain, C; Enrich, B. (Barbara); Rumpold, H. (Holger); Tilg, H

    2006-01-01

    BACKGROUND/AIMS: Recent reports suggest that the adipose tissue and adipokines are potent modulators of inflammation. However, there is only scarce knowledge on the functional role and regulation of endogenous adiponectin in non-fat tissues such as the liver under conditions of acute inflammation. METHODS: In the present study, we investigated adiponectin expression in healthy murine liver tissue and under inflammatory conditions in vivo. RESULTS: Adiponectin mRNA was readily detectable...

  8. Adiponectin modulates inflammatory reactions via calreticulin receptor–dependent clearance of early apoptotic bodies

    Takemura, Yukihiro; Ouchi, Noriyuki; Shibata, Rei; Aprahamian, Tamar; Kirber, Michael T.; Summer, Ross S; Kihara, Shinji; Walsh, Kenneth

    2007-01-01

    Obesity and type 2 diabetes are associated with chronic inflammation. Adiponectin is an adipocyte-derived hormone with antidiabetic and antiinflammatory actions. Here, we demonstrate what we believe to be a previously undocumented activity of adiponectin, facilitating the uptake of early apoptotic cells by macrophages, an essential feature of immune system function. Adiponectin-deficient (APN-KO) mice were impaired in their ability to clear apoptotic thymocytes in response to dexamethasone tr...

  9. Adiponectin Promotes Revascularization of Ischemic Muscle through a Cyclooxygenase 2-Dependent Mechanism ▿ †

    Ohashi, Koji; Ouchi, Noriyuki; Sato, Kaori; Higuchi, Akiko; Ishikawa, Tomo-o; Herschman, Harvey R.; Kihara, Shinji; Walsh, Kenneth

    2009-01-01

    Adiponectin is a fat-derived plasma protein that has cardioprotective roles in obesity-linked diseases. Because cyclooxygenase 2 (COX-2) is an important modulator of endothelial function, we investigated the possible contribution of COX-2 to adiponectin-mediated vascular responses in a mouse hind limb model of vascular insufficiency. Ischemic insult increased COX-2 expression in endothelial cells of wild-type mice, but this induction was attenuated in adiponectin knockout mice. Ischemia-induc...

  10. Adiponectin in mice with altered growth hormone action: links to insulin sensitivity and longevity?

    Lubbers, Ellen R; List, Edward O.; Jara, Adam; Sackman-Sala, Lucila; Cordoba-Chacon, Jose; Gahete, Manuel D.; Kineman, Rhonda D.; Boparai, Ravneet; Bartke, Andrzej; Kopchick, John J.; Berryman, Darlene E.

    2013-01-01

    Adiponectin is positively correlated with longevity and negatively correlated with many obesity-related diseases. While there are several circulating forms of adiponectin, the high molecular weight (HMW) version has been suggested to have the predominant bioactivity. Adiponectin gene expression and cognate serum protein levels are of particular interest in mice with altered growth hormone (GH) signaling as these mice exhibit extremes in obesity that are positively associated with insulin sens...

  11. Adiponectin as a tissue regenerating hormone: more than a metabolic function

    Fiaschi T; Magherini F; Gamberi T; PA.Modesti; Modesti A

    2014-01-01

    The great interest that scientists have for adiponectin is primarily due to its central metabolic role. Indeed, the major function of this adipokine is the control of glucose homeostasis that it exerts regulating liver and muscle metabolism. Adiponectin has insulin-sensitizing action and leads to down-regulation of hepatic gluconeogenesis and an increase of fatty acid oxidation. In addition, adiponectin is reported to play an important role in the inhibition of inflammation. The hormone is se...

  12. Adiponectin Expression in the Porcine Ovary during the Oestrous Cycle and Its Effect on Ovarian Steroidogenesis

    Anna Maleszka; Nina Smolinska; Anna Nitkiewicz; Marta Kiezun; Katarzyna Chojnowska; Kamil Dobrzyn; Hubert Szwaczek; Tadeusz Kaminski

    2014-01-01

    Adiponectin is an adipose-secreted hormone that regulates energy homeostasis and is also involved in the control of the reproductive system. The goal of the present study was to investigate changes in adiponectin gene and protein expression in porcine ovarian structures during the oestrous cycle and to examine the effects of in vitro administration of adiponectin on basal and gonadotrophin- and/or insulin-induced secretion of ovarian steroid hormones. Both gene and protein expression of adipo...

  13. Serum Ferritin Is Inversely Correlated with Serum Adiponectin Level: Population-Based Cross-Sectional Study

    Bon-Jeong Ku; Seul-Young Kim; Tae-Yong Lee; Kang-Seo Park

    2009-01-01

    Background: The serum concentrations of ferritin and adiponectin are associated with several metabolic disorders and have been used as predictors of insulin resistance and metabolic syndrome. But there have been no reports demonstrating a direct correlation between serum ferritin and adiponectin levels. We performed this study to evaluate the association between serum ferritin and adiponectin concentrations. Subjects and methods: We evaluated a total of 995 subjects from the Korea Rural Genom...

  14. Relationship between Visceral Adiposity and Plasma Adiponectin Concentration: Effect of Weight Loss

    Nasseri, E; M Djalali; SA Keshavarz; M. HOSSEINI; AR Dorosty; Chamari, M

    2008-01-01

    Background: Adiponectin is an anti-inflammatory and antiatherogenic protein that has a protective effect against athero­sclero­sis and diabetes. It is exclusively secreted by adipose tissue. Serum adiponectin levels are inversely associated with pa­rame­ters of overall adiposity including body mass index (BMI), fat mass, and percentage of body fat. Methods: In a cross-sectional study of 76 women we sought to evaluate if adiponectin is associated primarily with ...

  15. Insulin resistance, adiponectin and adverse outcomes following elective cardiac surgery: a prospective follow-up study

    Hjortdal Vibeke E; Christensen Thomas D; Andersen Niels H; Gjedsted Jakob; Hansen Troels K; Mikkelsen Martin M; Johnsen Søren P

    2010-01-01

    Abstract Background Insulin resistance and adiponectin are markers of cardio-metabolic disease and associated with adverse cardiovascular outcomes. The present study examined whether preoperative insulin resistance or adiponectin were associated with short- and long-term adverse outcomes in non-diabetic patients undergoing elective cardiac surgery. Methods In a prospective study, we assessed insulin resistance and adiponectin levels from preoperative fasting blood samples in 836 patients unde...

  16. Adiponectin changes in HCV-Genotype 4: relation to liver histology and response to treatment

    Derbala, M.; Rizk, N.; Al-Kaabi, S.; Amer, A; Shebl, F.; Al Marri, A.; Aigha, I.; Alyaesi, D.; Mohamed, H.; Aman, H; Basem, N.

    2009-01-01

    Summary.  Recently, attention has been focussed on adiponectin and its changes in different types of chronic liver disease. Its relation to hepatic fibrosis and insulin resistance in post-hepatitis liver disease is not clear. The aim of this study was to clarify the adiponectin changes in genotype 4 hepatitis C virus (HCV)-infected patient in relation to liver histology and insulin resistance, and its usefulness as a predictor of hepatic fibrosis and response to treatment. Total adiponectin a...

  17. Adiponectin and Risk of Coronary Heart Disease in Older Men and Women

    Kizer, Jorge R; Barzilay, Joshua I.; Kuller, Lewis H; Gottdiener, John S.

    2008-01-01

    Context: Despite established insulin-sensitizing and antiatherogenic preclinical effects, epidemiological investigations of adiponectin have yielded conflicting findings, and its relationship with coronary heart disease (CHD) remains uncertain.

  18. Identification of adiponectin receptor agonist utilizing a fluorescence polarization based high throughput assay.

    Sun, Yiyi; Zang, Zhihe; Zhong, Ling; Wu, Min; Su, Qing; Gao, Xiurong; Zan, Wang; Lin, Dong; Zhao, Yan; Zhang, Zhonglin

    2013-01-01

    Adiponectin, the adipose-derived hormone, plays an important role in the suppression of metabolic disorders that can result in type 2 diabetes, obesity, and atherosclerosis. It has been shown that up-regulation of adiponectin or adiponectin receptor has a number of therapeutic benefits. Given that it is hard to convert the full size adiponectin protein into a viable drug, adiponectin receptor agonists could be designed or identified using high-throughput screening. Here, we report on the development of a two-step screening process to identify adiponectin agonists. First step, we developed a high throughput screening assay based on fluorescence polarization to identify adiponectin ligands. The fluorescence polarization assay reported here could be adapted to screening against larger small molecular compound libraries. A natural product library containing 10,000 compounds was screened and 9 hits were selected for validation. These compounds have been taken for the second-step in vitro tests to confirm their agonistic activity. The most active adiponectin receptor 1 agonists are matairesinol, arctiin, (-)-arctigenin and gramine. The most active adiponectin receptor 2 agonists are parthenolide, taxifoliol, deoxyschizandrin, and syringin. These compounds may be useful drug candidates for hypoadiponectin related diseases. PMID:23691032

  19. Metabolic Risk Susceptibility in Men Is Partially Related to Adiponectin/Leptin Ratio

    Gloria Lena Vega

    2013-01-01

    Full Text Available Background. High adiponectin/leptin ratio may be protective from metabolic risks imparted by high triglyceride, low HDL, and insulin resistance. Methods. This cross-sectional study examines plasma adipokine levels in 428 adult men who were subgrouped according to low (<6.5 μg/mLand high (≥6.5 μg/mLadiponectin levels or a low or high ratio of adiponectin/leptin. Results. Men with high adiponectin/leptin ratio had lower plasma triglyceride and higher HDL cholesterol than those with low ratio. Similarly, those with high adiponectin/leptin ratio had lower TG/HDL cholesterol ratio and HOMA2-IR than those with low ratio. In contrast, levels of adiponectin or the ratio of adiponectin/leptin did not associate with systolic blood pressure. But the ratio of adiponectin/leptin decreased progressively with the increase in the number of risk factors for metabolic syndrome. Conclusion. Adipokine levels may reflect adipose tissue triglyceride storage capacity and insulin sensitivity. Leptin is an index of fat mass, and adiponectin is a biomarker of triglyceride metabolism and insulin sensitivity. Men with high adiponectin/leptin ratios have better triglyceride profile and insulin sensitivity than men with a low ratio regardless of waist girth.

  20. Identification of adiponectin receptor agonist utilizing a fluorescence polarization based high throughput assay.

    Yiyi Sun

    Full Text Available Adiponectin, the adipose-derived hormone, plays an important role in the suppression of metabolic disorders that can result in type 2 diabetes, obesity, and atherosclerosis. It has been shown that up-regulation of adiponectin or adiponectin receptor has a number of therapeutic benefits. Given that it is hard to convert the full size adiponectin protein into a viable drug, adiponectin receptor agonists could be designed or identified using high-throughput screening. Here, we report on the development of a two-step screening process to identify adiponectin agonists. First step, we developed a high throughput screening assay based on fluorescence polarization to identify adiponectin ligands. The fluorescence polarization assay reported here could be adapted to screening against larger small molecular compound libraries. A natural product library containing 10,000 compounds was screened and 9 hits were selected for validation. These compounds have been taken for the second-step in vitro tests to confirm their agonistic activity. The most active adiponectin receptor 1 agonists are matairesinol, arctiin, (--arctigenin and gramine. The most active adiponectin receptor 2 agonists are parthenolide, taxifoliol, deoxyschizandrin, and syringin. These compounds may be useful drug candidates for hypoadiponectin related diseases.

  1. Yin-Yang Regulation of Adiponectin Signaling by APPL Isoforms in Muscle Cells*

    Wang, Changhua; Xin, Xiaoban; Xiang, Ruihua; Ramos, Fresnida J.; Liu, Meilian; Lee, Hak Joo; Chen, Hongzhi; Mao, Xuming; Kikani, Chintan K.; Liu, Feng; Dong, Lily Q.

    2009-01-01

    APPL1 is a newly identified adiponectin receptor-binding protein that positively mediates adiponectin signaling in cells. Here we report that APPL2, an isoform of APPL1 that forms a dimer with APPL1, can interacts with both AdipoR1 and AdipoR2 and acts as a negative regulator of adiponectin signaling in muscle cells. Overexpression of APPL2 inhibits the interaction between APPL1 and AdipoR1, leading to down-regulation of adiponectin signaling in C2C12 myotubes. In contrast, suppressing APPL2 ...

  2. Involvement of adiponectin in the pathogenesis of dystrophinopathy

    Abou-Samra, Michel; Lecompte, Sophie; Schakman, Olivier; Noel, Laurence; Many, Marie C.; Gailly, Philippe; Brichard, Sonia M

    2015-01-01

    Background The hormone adiponectin (ApN) is decreased in the metabolic syndrome, where it plays a key pathogenic role. ApN also exerts some anti-inflammatory effects on skeletal muscles in mice exposed to acute or chronic inflammation. Here, we investigate whether ApN could be sufficiently potent to counteract a severe degenerative muscle disease, with an inflammatory component such as Duchenne muscular dystrophy (DMD). Methods Mdx mice (a DMD model caused by dystrophin mutation) were crossed...

  3. The Effect Paraoxonase-1, Hydrogen Peroxide and Adiponectin

    Baghaiee B; Siahkuhian M; Hakimi M; Bolboli L; Ahmadi Dehrashid K

    2016-01-01

    Background and aims: Paraoxonase-1, Adiponectin and Hydrogen Peroxide are among indexes that are influenced by sedentary lifestyle; and it is possible that they’ll be effective on blood pressure. However, it is not clear the relationship between their changes with blood pressure as a result of participation in regular physical activity. So, the aim of this research was to investigate the effect of 12 weeks moderate aerobic exercise on relationship betw...

  4. Adiponectin, a key adipokine in obesity related liver diseases

    Christa Buechler; Josef Wanninger; Markus Neumeier

    2011-01-01

    Non-alcoholic fatty liver disease (NAFLD) comprising hepatic steatosis, non-alcoholic steatohepatitis (NASH),and progressive liver fibrosis is considered the most common liver disease in western countries. Fatty liver is more prevalent in overweight than normal-weight people and liver fat positively correlates with hepatic insulin resistance. Hepatic steatosis is regarded as a benign stage of NAFLD but may progress to NASH in a subgroup of patients. Besides liver biopsy no diagnostic tools to identify patients with NASH are available, and no effective treatment has been established. Visceral obesity is a main risk factor for NAFLD and inappropriate storage of triglycerides in adipocytes and higher concentrations of free fatty acids may add to increased hepatic lipid storage, insulin resistance, and progressive liver damage. Most of the adipose tissue-derived proteins are elevated in obesity and may contribute to systemic inflammation and liver damage. Adiponectin is highly abundant in human serum but its levels are reduced in obesity and are even lower in patients with hepatic steatosis or NASH. Adiponectin antagonizes excess lipid storage in the liver and protects from inflammation and fibrosis. This review aims to give a short survey on NAFLD and the hepatoprotective effects of adiponectin.

  5. Adiponectin Stimulates Angiogenesis by Promoting Cross-talk between AMP-activated Protein Kinase and Akt Signaling in Endothelial Cells*

    Ouchi, Noriyuki; Kobayashi, Hideki; Kihara, Shinji; Kumada, Masahiro; Sato, Kaori; Inoue, Tatsuya; Funahashi, Tohru; Walsh, Kenneth

    2003-01-01

    Adiponectin is an adipocyte-specific adipocytokine with anti-atherogenic and anti-diabetic properties. Here, we investigated whether adiponectin regulates angiogenic processes in vitro and in vivo. Adiponectin stimulated the differentiation of human umbilical vein endothelium cells (HUVECs) into capillary-like structures in vitro and functioned as a chemoattractant in migration assays. Adiponectin promoted the phosphorylation of AMP-activated protein kinase (AMPK), protein kinase Akt/protein ...

  6. DMPD: Mechanisms for the anti-inflammatory effects of adiponectin in macrophages. [Dynamic Macrophage Pathway CSML Database

    Full Text Available 18336664 Mechanisms for the anti-inflammatory effects of adiponectin in macrophages...(.html) (.csml) Show Mechanisms for the anti-inflammatory effects of adiponectin in macrophages. PubmedID 18...336664 Title Mechanisms for the anti-inflammatory effects of adiponectin in macro

  7. Adiponectin Isoforms and Leptin Impact on Rheumatoid Adipose Mesenchymal Stem Cells Function

    Skalska, Urszula; Kontny, Ewa

    2016-01-01

    Adiponectin and leptin have recently emerged as potential risk factors in rheumatoid arthritis (RA) pathogenesis. In this study we evaluated the effects of adiponectin and leptin on immunomodulatory function of adipose mesenchymal stem cells (ASCs) derived from infrapatellar fat pad of RA patients. ASCs were stimulated with leptin, low molecular weight (LMW) and high/middle molecular weight (HMW/MMW) adiponectin isoforms. The secretory activity of ASCs and their effect on rheumatoid synovial fibroblasts (RA-FLS) and peripheral blood mononuclear cells (PBMCs) from healthy donors have been analysed. RA-ASCs secreted spontaneously TGFβ, IL-6, IL-1Ra, PGE2, IL-8, and VEGF. Secretion of all these factors was considerably upregulated by HMW/MMW adiponectin, but not by LMW adiponectin and leptin. Stimulation with HMW/MMW adiponectin partially abolished proproliferative effect of ASC-derived soluble factors on RA-FLS but did not affect IL-6 secretion in FLS cultures. ASCs pretreated with HMW/MMW adiponectin maintained their anti-inflammatory function towards PBMCs, which was manifested by moderate PBMCs proliferation inhibition and IL-10 secretion induction. We have proved that HMW/MMW adiponectin stimulates secretory potential of rheumatoid ASCs but does not exert strong impact on ASCs function towards RA-FLS and PBMCs. PMID:26681953

  8. The association between adiponectin and ADIPOQ gene polymorphisms with obesity among young Jordanian women

    Alomari Mahmoud A.

    2016-01-01

    Full Text Available Obesity is a risk for multiple diseases and an independent cause of morbidity and mortality with staggering global rates. Adiponectin is an adipocyte-derived peptide associated with reduced obesity. In this study, the effect of ADIPOQ gene single nucleotide polymorphisms (SNPs on obesity and adiponectin relationship was examined. The study was conducted on 389 adult females. Obesity was measured using body weight, BMI, percent body fat, and waist and hip ratio. ADIPOQ G276T and I164T SNPs were genotyped using RFLP procedure. Adiponectin plasma levels were quantified using ELISA technique. Adiponectin correlated with all obesity measures (p0.05 with GG and TT of the G276T SNP. With respect to` I164T SNP, the correlations between adiponectin and obesity measures remained in all genotypes except with W/H ratio and %Bf remained in the participants with CC genotype and with W/H ratio in CT/TT genotypes. Further analyses reveled that adiponectin was lower (p<0.05 in the participants with GT versus the GG and TT genotypes of G276T SNP. The data confirms the effect of adiponectin for obesity. It also shows the importance of ADIPOQ SNPs in the relationship between adiponectin and obesity in young adult females.

  9. Serum Adiponectin and Resistin Levels in de Novo and Relapsed Acute Lymphoblastic Leukemia Children Patients

    Hatim A El-Baz

    2013-05-01

    Full Text Available Background: Adipose tissue secretes a large number of adipocytokines such as leptin, resistin, and adiponectin. Many of these hormones and cytokines are altered in obese individuals and may lead to disruption of the normal balance between cell proliferation, differentiation, and apoptosis. The aim of our work was to investigate the disturbance of secretion of adiponectin and resistin in de novo and relapsed acute lymphoblastic leukemia (ALL in Egyptian children and determine whether adiponectin and resistin are implicated in increased risk relapse compared to healthy individuals.Methods: Measurements of adiponectin and resistin were performed at diagnosis, in 32 patients with de novo ALL aged 3 to 18 years (mean 9.8 y and 19 children with relapsed ALL aged 5 to 17 (mean 9.9 yr. 10 apparently healthy children with matched age and sex were used as controls.Results: Mean adiponectin levels were low (P < 0.05, whereas mean resistin levels were high (P<0.05 at diagnosis and relapsed ALL (compared to healthy controls. A significant decrease of adiponectin levels was observed in relapsed ALL compared to de novo ALL. In contrast resistin was significantly increased in relapsed ALL compared to de novo patients. Adiponectin in ALL subjects inversely correlated with resistin level (r = -0.51, P < 0.001.Conclusion: Low adiponectin and high resistin level at diagnosis suggest their implication in ALL pathogenesis and may serve as potential clinically significant diagnostic markers to detect leukemic relapse.

  10. Adiponectin Decreases Plasma Glucose and Improves Insulin Sensitivity in Diabetic Swine

    Xiaobo HU; Meihua SHE; Hongjie HOU; Qinkai LI; Qingyun SHEN; Yi LUO; Weidong YIN

    2007-01-01

    To investigate the effects of recombinant human adiponectin on the metabolism of diabetic swine induced by feeding a high-fat/high-sucrose diet (HFSD), diabetic animal models were constructed by feeding swine with HFSD for 6 months. The effects of recombinant adiponectin were assessed by detecting the change of plasma glucose levels by commercially available enzymatic method test kits and evaluating the insulin sensitivity by oral glucose tolerance test (OGTT). About 1.5 g purified recombinant adiponectin was produced using a 15-liter fermenter. A single injection of purified recombinant human adiponectin to diabetic swine led to a 2- to 3-fold elevation in circulating adiponectin, which triggered a transient decrease in basal glucose level (P<0.05). This effect on glucose was not associated with an increase in insulin level. Moreover, after adiponectin injection, swine also showed improved insulin sensitivity compared with the control (P<0.05). Adiponectin might have the potential to be a glucose-lowering agent for metabolic disease. Adiponectin as a potent insulin enhancer linking adipose tissue and glucose metabolism could be useful to treat insulin resistance.

  11. Adiponectin and its receptors in rodent models of fatty liver disease and liver cirrhosis

    Neumeier, Markus; Hellerbrand, Claus; Gäbele, Erwin; Buettner, Roland; Bollheimer, Cornelius; Weigert, Johanna; Schäffler, Andreas; Weiss, Thomas S.; Lichtenauer, Monika; Schölmerich, Jürgen; Buechler, Christa

    2006-01-01

    AIM: To determine circulating and hepatic adiponectin in rodents with fatty liver disease or liver cirrhosis and investigate expression of the adiponectin receptors AdipoR1 on the mRNA and protein level and AdipoR2 on the mRNA level.

  12. APPL1-mediated activation of STAT3 contributes to inhibitory effect of adiponectin on hepatic gluconeogenesis.

    Ding, Youming; Zhang, Deling; Wang, Bin; Zhang, Yemin; Wang, Lei; Chen, Xiaoyan; Li, Mingxin; Tang, Zhao; Wang, Changhua

    2016-09-15

    Adiponectin has been shown to suppress hepatic gluconeogenesis. However, the signaling pathways underlying its action remain ill-defined. The purpose of this study was to examine the potential role of APPL1 in mediating anti-gluconeogenic ability of adiponectin. Primary hepatocytes were isolated from male C57BL/6 mice. Western blot and RT-PCR were performed to detect protein expression and mRNA level, respectively. The protein-protein association was determined by immunoprecipitation and GST pull-down assay. We found that APPL1 protein levels were negatively associated with expressions of proteins and mRNAs of gluconeogenesis enzymes under stimulation with adiponectin. In addition, adiponectin-stimulated STAT3 phosphorylation and acetylation were positively regulated by APPL1 and negative regulated by SirT1. Pharmacological and genetic inhibition of STAT3 mitigated impact of adiponectin on hepatic gluconeogenesis. Furthermore, adiponectin administration facilitated the binding of APPL1 to SirT1 and suppressed the association of SirT1 with STAT3. Taken together, our study showed that APPL1-SirT1-STAT3 pathway mediated adiponectin signaling in primary hepatocytes. This new finding provides a novel mechanism by which adiponectin suppresses hepatic gluconeogenesis. PMID:27246173

  13. Adiponectin: an independent risk factor for coronary heart disease in men in the Framingham Offspring Study

    Our aim was to determine whether plasma adiponectin levels were an independent predictor of coronary heart disease (CHD) risk. Plasma adiponectin levels were measured in 3,188 male and female participants from cycle 6 of the Framingham Offspring Study (mean age: 57 years in both men and women; BMI:...

  14.  Adiponectin in early and chronic rheumatoid arthritis and osteoarthritis

    Laurberg, Trine Bay

      Dato 31. januar 2006Title Adiponectin in early and chronic rheumatoid arthritis and osteoarthritisAuthors:Trine Bay Laurberg,Torkell Ellingsen,Jan Frystyk,Ib Hansen,Anette Jørgensen,Ulrik Tarp,Merete Lund Hetland,Kim Hørslev-Petersen,Nete Hornung,Jørgen Hjelm Poulsen,Allan Flyvbjerg,Kristian St......  Dato 31. januar 2006Title Adiponectin in early and chronic rheumatoid arthritis and osteoarthritisAuthors:Trine Bay Laurberg,Torkell Ellingsen,Jan Frystyk,Ib Hansen,Anette Jørgensen,Ulrik Tarp,Merete Lund Hetland,Kim Hørslev-Petersen,Nete Hornung,Jørgen Hjelm Poulsen,Allan Flyvbjerg...... progression of cartilage and bone destruction, and bone formation (osteophytes). Adiponectin is an adipocyte-derived protein with antiinflammatory activity. Low level of adiponectin has been associated with chronic low-inflammatory conditions such as obesity, atherosclerosis, insulin resistance, and type 2...... diabetes mellitus. It is unknown if adiponectin is involved in the disease process of RA and OA.Objectives:  The aim was to quantify plasma adiponectin (p-adiponectin) from RA and OA patients and to evaluate p-adiponectin as a marker of treatment response to methotrexate (MTX) and disease activity in RA...

  15. Sex-Specific Effects of Adiponectin on Carotid Intima-Media Thickness and Incident Cardiovascular Disease

    Persson, Jonas; Strawbridge, Rona J.; McLeod, Olga; Gertow, Karl; Silveira, Angela; Baldassarre, Damiano; Van Zuydam, Natalie; Shah, Sonia; Fava, Cristiano; Gustafsson, Stefan; Veglia, Fabrizio; Sennblad, Bengt; Larsson, Malin; Sabater-Lleal, Maria; Leander, Karin; Gigante, Bruna; Tabak, Adam; Kivimaki, Mika; Kauhanen, Jussi; Rauramaa, Rainer; Smit, Andries J.; Mannarino, Elmo; Giral, Philippe; Humphries, Steve E.; Tremoli, Elena; de Faire, Ulf; Lind, Lars; Ingelsson, Erik; Hedblad, Bo; Melander, Olle; Kumari, Meena; Hingorani, Aroon; Morris, Andrew D.; Palmer, Colin N. A.; Lundman, Pia; Ohrvik, John; Soderberg, Stefan

    2015-01-01

    Background-Plasma adiponectin levels have previously been inversely associated with carotid intima-media thickness (IMT), a marker of subclinical atherosclerosis. In this study, we used a sex-stratified Mendelian randomization approach to investigate whether adiponectin has a causal protective influ

  16. Endocytosis of adiponectin receptor 1 through a clathrin-and Rab5-dependent pathway

    Qiurong Ding; Zhenzhen Wang; Yan Chen

    2009-01-01

    In eukaryotic cells, receptor endocytosis is a key event regulating signaling transduction. Adiponectin receptors belong to a new receptor family that is distinct from G-protein-coupled receptors and has critical roles in the pathogen-esis of diabetes and metabolic syndrome. Here, we analyzed the endocytosis of adiponectin and adiponectin receptor 1 (AdipoR1) and found that they are both internalized into transferrin-positive compartments that follow similar traffic routes. Blocking clathrin-mediated endocytosis by expressing Epsl5 mutants or depleting K+ trapped AdipoRl at the plasma membrane, and K+ depletion abolished adiponectin internalization, indicating that the endocytosis of AdipoRl and adiponectin is clathrin-dependent. Depletion of K+ and overexpression of Eps15 mutants enhance adiponectin-stimulated AMP-activated protein kinase phosphorylation, suggesting that the endocytosis of AdipoR1 might down-regulate adiponectin signaling. In addition, AdipoR1 colocalizes with the small GTPase Rab5, and a dominant negative Rab5 abrogates AdipoR1 endocytosis. These data indicate that AdipoRl is internalized through a clathrin- and Rab5-dependent pathway and that endocytosis may play a role in the regulation of adiponectin signaling.

  17. The adiponectin receptor homologs in C. elegans promote energy utilization and homeostasis

    Svensson, Emma; Olsen, Louise Cathrine Braun; Mörck, Catarina;

    2011-01-01

    Adiponectin is an adipokine with insulin-sensitising actions in vertebrates. Its receptors, AdipoR1 and AdipoR2, are PAQR-type proteins with 7-transmembrane domains and topologies reversed that of GPCR's, i.e. their C-termini are extracellular. We identified three adiponectin receptor homologs in...

  18. ADIPONECTIN DIMINISHES ORGAN-SPECIFIC MICROVASCULAR ENDOTHELIAL CELL ACTIVATION ASSOCIATED WITH SEPSIS

    van Meurs, Matijs; Castro, Pedro; Shapiro, Nathan I.; Lu, Shulin; Yano, Midori; Maeda, Norikazu; Funahashi, Tohru; Shimomura, Ichiro; Zijlstra, Jan G.; Molema, Grietje; Parikh, Samir M.; Aird, William C.; Yano, Kiichiro

    2012-01-01

    Experimental sepsis was induced in male C57BL/6j, adiponectin-deficient mice (ADPNKO), and wild-type littermates by i.p. injection of 16 mg/kg lipopolysaccharide or cecal ligation and puncture. Blood and tissue samples were harvested 24 h after model induction. Circulating adiponectin is reduced in

  19. Relationship between serum leptin and adiponectin levels in patients with primary hypertensive nephropathy

    Objective: To explore the relationship between serum leptin and adiponectin levels in patients with primary hypertensive nephropathy. Methods: Serum leptin (wire RIA) and serum adiponectin (with ELISA) levels were measured in 34 patients with primary hypertensive nephropathy, in 50 patients with essential hypertension but no nephropathy, as well as in 35 controls. Results: Serum leptin levels in the patients were significantly higher than those in controls (P<0.01). While the serum adiponectin levels were significantly lower than those in controls (P<0.01 ). Among the patients, serum leptin levels were significantly higher in subject with nephropathy than those in subjects without nephropathy (P<0.05) while the reverse was true for adiponectin (P<0.05). Conclusion: The development of primary hypertensive nephropathy is correlated with a higher serum leptin and a decreased serum adiponectin levels. (authors)

  20. Dermal Lipogenesis Inhibits Adiponectin Production in Human Dermal Fibroblasts while Exogenous Adiponectin Administration Prevents against UVA-Induced Dermal Matrix Degradation in Human Skin

    Chien-Liang Fang

    2016-07-01

    Full Text Available Adiponectin is one of the most abundant adipokines from the subcutaneous fat, and regulates multiple activities through endocrine, paracrine, or autocrine mechanisms. However, its expression in adipogenic induced fibroblasts, and the potential role in photoaging has not been determined. Here, human dermal fibroblasts, Hs68, were presented as a cell model of dermal lipogenesis through stimulation of adipogenic differentiation medium (ADM. Similar to other studies in murine pre-adipocyte models (i.e., 3T3-L1, Hs68 fibroblasts showed a tendency to lipogenesis based on lipid accumulation, triglyceride formation, and the expressions of PPAR-γ, lipoprotein lipase (LPL, and FABP4 mRNA. As expected, ADM-treated fibroblasts displayed a reduction on adiponectin expression. Next, we emphasized the photoprotective effects of adiponectin against UVA-induced damage in Hs68 fibroblasts. UVA radiation can downregulate cell adhesion strength and elastic modulus of Hs68 fibroblasts. Moreover, UVA radiation could induce the mRNA expressions of epidermal growth factor receptor (EGFR, adiponectin receptor 1 (AdipoR1, matrix metalloproteinase-1 (MMP-1, MMP-3, and cyclooxygenase-2 (COX-2, but downregulate the mRNA expressions of type I and type III collagen. On the other hand, post-treatment of adiponectin can partially overcome UVA-induced reduction in the cell adhesion strength of Hs68 fibroblasts through the activation of AdipoR1 and the suppression of EGF-R. In addition, post-treatment of adiponectin indicated the increase of type III collagen and elastin mRNA expression and the decrease of MMP-1 and MMP-3 mRNA expression, but a limited degree of recovery of elastic modulus on UVA-irradiated Hs68 fibroblasts. Overall, these results suggest that dermal lipogenesis may inhibit the expression of adiponectin while exogenous adiponectin administration prevents against UVA-induced dermal matrix degradation in Hs68 fibroblasts.

  1. Dermal Lipogenesis Inhibits Adiponectin Production in Human Dermal Fibroblasts while Exogenous Adiponectin Administration Prevents against UVA-Induced Dermal Matrix Degradation in Human Skin

    Fang, Chien-Liang; Huang, Ling-Hung; Tsai, Hung-Yueh; Chang, Hsin-I

    2016-01-01

    Adiponectin is one of the most abundant adipokines from the subcutaneous fat, and regulates multiple activities through endocrine, paracrine, or autocrine mechanisms. However, its expression in adipogenic induced fibroblasts, and the potential role in photoaging has not been determined. Here, human dermal fibroblasts, Hs68, were presented as a cell model of dermal lipogenesis through stimulation of adipogenic differentiation medium (ADM). Similar to other studies in murine pre-adipocyte models (i.e., 3T3-L1), Hs68 fibroblasts showed a tendency to lipogenesis based on lipid accumulation, triglyceride formation, and the expressions of PPAR-γ, lipoprotein lipase (LPL), and FABP4 mRNA. As expected, ADM-treated fibroblasts displayed a reduction on adiponectin expression. Next, we emphasized the photoprotective effects of adiponectin against UVA-induced damage in Hs68 fibroblasts. UVA radiation can downregulate cell adhesion strength and elastic modulus of Hs68 fibroblasts. Moreover, UVA radiation could induce the mRNA expressions of epidermal growth factor receptor (EGFR), adiponectin receptor 1 (AdipoR1), matrix metalloproteinase-1 (MMP-1), MMP-3, and cyclooxygenase-2 (COX-2), but downregulate the mRNA expressions of type I and type III collagen. On the other hand, post-treatment of adiponectin can partially overcome UVA-induced reduction in the cell adhesion strength of Hs68 fibroblasts through the activation of AdipoR1 and the suppression of EGF-R. In addition, post-treatment of adiponectin indicated the increase of type III collagen and elastin mRNA expression and the decrease of MMP-1 and MMP-3 mRNA expression, but a limited degree of recovery of elastic modulus on UVA-irradiated Hs68 fibroblasts. Overall, these results suggest that dermal lipogenesis may inhibit the expression of adiponectin while exogenous adiponectin administration prevents against UVA-induced dermal matrix degradation in Hs68 fibroblasts. PMID:27428951

  2. Association between lifestyle factors and plasma adiponectin levels in Japanese men

    Nakayama Kunio

    2005-11-01

    Full Text Available Abstract Background Adiponectin is an adipocyte-specific protein that plays a role in obesity, insulin resistant, lipid metabolism, and anti-inflammation. Hypoadiponectinemia may be associated with a higher risk for type 2 diabetes and cardiovascular disease. Some studies suggest that adiponectin levels are modulated by lifestyle factors, but little is known about the associations between lifestyle factors and plasma adiponectin levels in Japanese people. We therefore investigated the associations between lifestyle factors and plasma adiponectin levels in general Japanese men. Methods The subjects were 202 Japanese male workers who participated in an annual health check. They provided details about anthropometrical data, blood collection, their use of prescribed medication, and the clinical history of their families. They also completed a self-administered questionnaire about their lifestyles. Results Subjects with plasma adiponectin levels below 4.0 μg/ml had significantly lower levels of HDL cholesterol and higher levels of BMI, SBP, DBP, total cholesterol, FBG, and platelets than did subjects with higher adiponectin levels. In multiple logistic regression after multiple adjustment, a plasma adiponectin level below 4.0 μg/ml was significantly associated with smoking (odds ratio [OR] = 2.08, 95% confidence interval [CI] = 1.01–4.30, a daily diet rich in deep-yellow vegetables (OR = 0.25, 95% CI= 0.07–0.91, frequent eating out (OR = 2.45, 95% CI = 1.19–5.08, and physical exercise two or more times a week (OR = 0.21, 95% CI = 0.06–0.74. Conclusion Our findings show that adiponectin levels in general Japanese men are independently related to smoking, dietary factors, and physical exercise. We think that lifestyle habits might independently modulate adiponectin levels and that adiponectin might be the useful biomarker helping people to avoid developing type 2 diabetes and cardiovascular disease by modifying their lifestyles.

  3. Serum Adiponectin and Cardiometabolic Risk in Patients with Acute Coronary Syndromes

    The adipose tissue is considered not only a storable energy source, but mainly an endocrine organ that secretes several cytokines. Adiponectin, a novel protein similar to collagen, has been found to be an adipocyte-specific cytokine and a promising cardiovascular risk marker. To evaluate the association between serum adiponectin levels and the risk for cardiovascular events in patients with acute coronary syndromes (ACS), as well as the correlations between adiponectin and metabolic, inflammatory, and myocardial biomarkers. We recruited 114 patients with ACS and a mean 1.13-year follow-up to measure clinical outcomes. Clinical characteristics and biomarkers were compared according to adiponectin quartiles. Cox proportional hazard regression models with Firth's penalization were applied to assess the independent association between adiponectin and the subsequent risk for both primary (composite of cardiovascular death/non-fatal acute myocardial infarction (AMI)/non-fatal stroke) and co-primary outcomes (composite of cardiovascular death/non-fatal AMI/non-fatal stroke/ rehospitalization requiring revascularization). There were significant direct correlations between adiponectin and age, HDL-cholesterol, and B-type natriuretic peptide (BNP), and significant inverse correlations between adiponectin and waist circumference, body weight, body mass index, Homeostasis Model Assessment (HOMA) index, triglycerides, and insulin. Adiponectin was associated with higher risk for primary and co-primary outcomes (adjusted HR 1.08 and 1.07/increment of 1000; p = 0.01 and p = 0.02, respectively). In ACS patients, serum adiponectin was an independent predictor of cardiovascular events. In addition to the anthropometric and metabolic correlations, there was a significant direct correlation between adiponectin and BNP

  4. Serum Adiponectin and Cardiometabolic Risk in Patients with Acute Coronary Syndromes

    Oliveira, Gustavo Bernardes de Figueiredo, E-mail: goliveira@cardiol.br; França, João Ítalo Dias; Piegas, Leopoldo Soares [Instituto Dante Pazzanese de Cardiologia, São Paulo, SP (Brazil)

    2013-11-15

    The adipose tissue is considered not only a storable energy source, but mainly an endocrine organ that secretes several cytokines. Adiponectin, a novel protein similar to collagen, has been found to be an adipocyte-specific cytokine and a promising cardiovascular risk marker. To evaluate the association between serum adiponectin levels and the risk for cardiovascular events in patients with acute coronary syndromes (ACS), as well as the correlations between adiponectin and metabolic, inflammatory, and myocardial biomarkers. We recruited 114 patients with ACS and a mean 1.13-year follow-up to measure clinical outcomes. Clinical characteristics and biomarkers were compared according to adiponectin quartiles. Cox proportional hazard regression models with Firth's penalization were applied to assess the independent association between adiponectin and the subsequent risk for both primary (composite of cardiovascular death/non-fatal acute myocardial infarction (AMI)/non-fatal stroke) and co-primary outcomes (composite of cardiovascular death/non-fatal AMI/non-fatal stroke/ rehospitalization requiring revascularization). There were significant direct correlations between adiponectin and age, HDL-cholesterol, and B-type natriuretic peptide (BNP), and significant inverse correlations between adiponectin and waist circumference, body weight, body mass index, Homeostasis Model Assessment (HOMA) index, triglycerides, and insulin. Adiponectin was associated with higher risk for primary and co-primary outcomes (adjusted HR 1.08 and 1.07/increment of 1000; p = 0.01 and p = 0.02, respectively). In ACS patients, serum adiponectin was an independent predictor of cardiovascular events. In addition to the anthropometric and metabolic correlations, there was a significant direct correlation between adiponectin and BNP.

  5. Insulin resistance, adiponectin and adverse outcomes following elective cardiac surgery: a prospective follow-up study

    Hjortdal Vibeke E

    2010-12-01

    Full Text Available Abstract Background Insulin resistance and adiponectin are markers of cardio-metabolic disease and associated with adverse cardiovascular outcomes. The present study examined whether preoperative insulin resistance or adiponectin were associated with short- and long-term adverse outcomes in non-diabetic patients undergoing elective cardiac surgery. Methods In a prospective study, we assessed insulin resistance and adiponectin levels from preoperative fasting blood samples in 836 patients undergoing cardiac surgery. Population-based medical registries were used for postoperative follow-up. Outcomes included all-cause death, myocardial infarction or percutaneous coronary intervention, stroke, re-exploration, renal failure, and infections. The ability of insulin resistance and adiponectin to predict clinical adverse outcomes was examined using receiver operating characteristics. Results Neither insulin resistance nor adiponectin were statistically significantly associated with 30-day mortality, but adiponectin was associated with an increased 31-365-day mortality (adjusted odds ratio 2.9 [95% confidence interval 1.3-6.4] comparing the upper quartile with the three lower quartiles. Insulin resistance was a poor predictor of adverse outcomes. In contrast, the predictive accuracy of adiponectin (area under curve 0.75 [95% confidence interval 0.65-0.85] was similar to that of the EuroSCORE (area under curve 0.75 [95% confidence interval 0.67-0.83] and a model including adiponectin and the EuroSCORE had an area under curve of 0.78 [95% confidence interval 0.68-0.88] concerning 31-365-day mortality. Conclusions Elevated adiponectin levels, but not insulin resistance, were associated with increased mortality and appear to be a strong predictor of long-term mortality. Additional studies are warranted to further clarify the possible clinical role of adiponectin assessment in cardiac surgery. Trial Registration The Danish Data Protection Agency; reference no

  6. Adiponectin and its receptors in rodent models of fatty liver disease and liver cirrhosis

    Markus Neumeier; Jürgen Sch(o)lmerich; Christa Buechler; Claus Hellerbrand; Erwin G(a)bele; Roland Buettner; Cornelius Bollheimer; Johanna Weigert; Andreas Sch(a)ffler; Thomas S Weiss; Monika Lichtenauer

    2006-01-01

    AIM: To determine circulating and hepatic adiponectin in rodents with fatty liver disease or liver cirrhosis and investigate expression of the adiponectin receptors AdipoR1 on the mRNA and protein level and AdipoR2 on the mRNA level.METHODS: Fat fed rats were used as a model for fatty liver disease and bile duct ligation in mice to investigate cirrhotic liver. Expression of AdipoR1 and AdipoR2 mRNA was determined by real time RT-PCR. AdipoR1 protein was analysed by immunoblot. Adiponectin was measured by ELISA.RESULTS: Systemic adiponectin is reduced in fat fed rats but is elevated in mice after bile duct ligation (BDL). Hepatic adiponectin protein is lower in steatotic liver but not in the liver of BDL-mice when compared to controls. Adiponectin mRNA was not detected in human liver samples or primary human hepatocytes nor in rat liver but recombinant adiponectin is taken up by isolated hepatocytes in-vitro. AdipoR1 mRNA and AdipoR1 protein levels are similar in the liver tissue of control and fat fed animals whereas AdipoR2 mRNA is induced. AdipoR2 mRNA and AdipoR1 mRNA and protein is suppressed in the liver of BDL-mice.CONCLUSION: Our studies show reduced circulating adiponectin in a rat model of fatty liver disease whereas circulating adiponectin is elevated in a mouse model of cirrhosis and similar findings have been described in humans. Diminished hepatic expression of adiponectin receptors was only found in liver cirrhosis.

  7. Total and high molecular weight adiponectin and hepatocellular carcinoma with HCV infection.

    Shuji Sumie

    Full Text Available BACKGROUND: Adiponectin is shown to be inversely associated with development and progression of various cancers. We evaluated whether adiponectin level was associated with the prevalence and histological grade of hepatocellular carcinoma (HCC, and liver fibrosis in patients with hepatitis C virus (HCV infection. METHODS: A case-control study was conducted on 97 HCC patients (cases and 97 patients (controls matched for sex, Child-Pugh grade and platelet count in patients with HCV infection. The serum total and high molecular weight (HMW adiponectin levels were measured by enzyme-linked immunosorbent assays and examined in their association with the prevalence of HCC. In addition, the relationship between these adiponectin levels and body mass index (BMI, progression of liver fibrosis, and histological grade of HCC was also evaluated. Liver fibrosis was assessed using the aspartate aminotransferase to platelet ratio index (APRI. RESULTS: There were no significant differences in the serum total and HMW adiponectin levels between cases and controls. Moreover, there were no inverse associations between serum total and HMW adiponectin levels and BMI in both cases and controls. On the other hand, serum total and HMW adiponectin levels are positively correlated with APRI in both cases (r = 0.491, P<0.001 and r = 0.485, P<0.001, respectively and controls (r = 0.482, P<0.001 and r = 0.476, P<0.001, respectively. Interestingly, lower serum total (OR 11.76, 95% CI: 2.97-46.66 [P<0.001] and HMW (OR 10.24, CI: 2.80-37.40 [P<0.001] adiponectin levels were independent risk factors of worse histological grade of HCC. CONCLUSIONS: Our results suggested that serum total and HMW adiponectin levels were predictors of liver fibrosis, but not prevalence of HCC in patients with HCV infection. Moreover, low these adiponectin levels were significantly associated with worse histological grades.

  8. Correlation between atherogenic risk and adiponectin in gestational diabetes mellitus

    Beata Matyjaszek-Matuszek

    2014-03-01

    Full Text Available Introduction and objective. Gestational diabetes mellitus (GDM is a pregnancy complication which increases the risk for maternal and foetal complications during pregnancy, and also significantly increases the cardiovascular risk for women’s health in the postpartum. Current literature provides contradictory information on the role of adiponectin (AdipoQ in the course of GDM. The aim of the study was to measure AdipoQ concentration in blood of women with GDM and to find correlations between this adipokine and clinical and biochemical parameters of the atherogenic risk. Material and methods. The GDM group included 50 women diagnosed with GDM between 24 – 28 weeks of gestation who underwent routine prenatal tests for GDM in compliance with the guidelines of the Polish Diabetes Association. All patients underwent clinical and laboratory evaluation at GDM diagnosis. Laboratory tests included serum AdipoQ concentration, fasting glucose and insulin, OGTT, lipid parameters, C-reactive protein and fibrinogen in serum. Results. The GDM group showed significantly elevated fasting glucose, insulin, HOMA-IR values, total cholesterol, LDLcholesterol and triglicerydes as compared with the control group (p<0.05. The atherogenic index, CRP, fibrinogen in women with GDM were significantly higher than in the control group (p<0.05. AdipoQ concentrations did not differ significantly between the groups during gestation (p=0.7054. No correlations, except with the neonatal weight (r= – 0.29, p<0.05, were found between AdipoQ and the studied parameters. Conclusions. Based on the conducted studies, it may be conclude that women with early diagnosed and promptly treated GDM have a normal adiponectin level, although insulin resistant changes and increased cardiovascular risk in basic metabolic parameters are observed. Moreover, adiponectin does not reflect the atherogenic risk in pregnant women with GDM.

  9. Study on the relationship between the serum adiponectin and insulin levels in patients with polycystic ovary syndrome (PCOS)

    Objective: To study the relationship between the serum adiponectin and insulin levels in patients with polycystic ovary syndrome (PCOS). Methods: Levels of serum adiponectin and insulin were detected with RIA in 36 patients with polycystic ovary syndrome and 35 controls. Results: In the patients, the serum adiponectin levels were significantly lower than those in controls (P <0.01), while the serum insulin levels were significantly higher (P <0.01). Serum adiponectin and insulin levels were mutually negatively correlated (r =-0.5034, P < 0.01). Conclusion: There is a close relationship between the serum adiponectin and insulin levels in patients with polycystic ovary syndrome. (authors)

  10. RELATIONSHIP OF SERUM ADIPONECTIN LEVELS WITH ADIPOSITY, GLUCOCORTICOIDS, LEPTIN AND INSULIN

    杨颖; 唐金凤; 汪启迪; 李凤英; 顾卫琼; 洪洁; 张一波; 周丽斌; 李荣英; 陈名道

    2005-01-01

    Objective To investigate the relationship between serum adiponectin levels with adiposity,glucocorticoids , insulin and leptin in Cushing' s syndrome, obesity and non-obese subjects. Methods The serum adiponectin concentrations were measured in 104 non-obese and 57 overweight or obese (BMI≥25) subjects by RIA. 15 patients with Cushing's syndrome, 10 with obesity and 9 non-obese subjects were investigated, with their serum adiponectin, glucocorticoids, insulin and leptin levels measured at 8: 00, 12: 00, 16: 00, 20: 00, 24: 00 and 3:00. Dexamethasone suppression tests in both obesity and Cushing's syndrome were performed at the dose of lmg,2mg and 5mg. Results The serum adiponectin concentrations in non-obese were (10.15±6.33) mg/L in male and (13.82 ±6. 09 ) mg/L in female, and those in overweight or obese ones were(5. 78 ±3.55)mg/L in male and (8. 13 ± 4. 32 ) mg/L in female. In both men and women, the fasting adiponectin levels in overweight or obese subjects were lower than those of the non-obese ones, and serum adiponectin concentrations were significantly nagetively correlated with BMI, % Fat and waist circumference. The circadian rhythmicity of adiponectin was not distinct, but the adiponectin levels in obesity were lower than those of the non-obese subjects at all 6 time spots. The serum adiponectin area under curve (AUC) were significantly nagetively correlated with BMI, waist circumference and insulin AUC. The adiponectin levels with dexamethasone administration for a short-term both at higher doses and lower doses did not change, but was decreased after surgery. Conclusion Adiponectin is a hormone secreted by adipocytes which may intimately related to obese and insulin resistance. Therefore, any treatment that could be used to increase adiponectin should be beneficial. Neither long-term endogenous hyper-glucocorticoid nor short-term dexamethasone administration may affect the adiponectin levels, and similarly, no change with elevated postprandial

  11. ADIPOQ, ADIPOR1, and ADIPOR2 Polymorphisms in Relation to Serum Adiponectin Levels and Body Mass Index in Black and White Women

    Sarah S Cohen; Gammon, Marilie D.; North, Kari E; Millikan, Robert C.; Lange, Ethan M.; Williams, Scott M.; Zheng, Wei; Cai, Qiuyin; Long, Jirong; SMITH, JEFFREY R.; Signorello, Lisa B.; William J Blot; Charles E Matthews

    2011-01-01

    Adiponectin is an adipose-secreted protein with influence on several physiologic pathways including those related to insulin sensitivity, inflammation, and atherogenesis. Adiponectin levels are highly heritable and several single nucleotide polymorphisms (SNPs) in adiponectin-related genes (ADIPOQ, ADIPOR1, ADIPOR2) have been examined in relation to circulating adiponectin levels and obesity phenotypes, but despite differences in adiponectin levels and obesity prevalence by race, few studies ...

  12. Higher Levels of Adiponectin in Vascular Endothelial Cells are Associated with Greater Brachial Artery Flow-mediated Dilation in Older Adults

    Yoo, Jeung-Ki; Hwang, Moon-Hyon; Luttrell, Meredith J.; Kim, Han-Kyul; Meade, Thomas H.; English, Mark; Segal, Mark S.; Christou, Demetra D.

    2015-01-01

    Adiponectin, an adipocyte-derived protein, exerts anti-atherosclerotic effects on the vascular endothelium. Recently adiponectin protein has been reported in murine vascular endothelial cells, however, whether adiponectin is present in human vascular endothelial cells remains unexplored. We sought to examine 1) adiponectin protein in vascular endothelial cells collected from older adults free of overt cardiovascular disease; 2) the relation between endothelial cell adiponectin and in vivo vas...

  13. Endogenous and exogenous factors influencing the concentrations of adiponectin in body fluids and tissues in the bovine.

    Sauerwein, Helga; Häußler, Susanne

    2016-07-01

    Adiponectin, one of the messenger molecules secreted from adipose tissue that are collectively termed adipokines, has been demonstrated to play a central role in lipid and glucose metabolism in humans and laboratory rodents; it improves insulin sensitivity and exerts antidiabetic and antiinflammatory actions. Adiponectin is synthesized as a 28 kDa monomer but is not secreted as such; instead, it is glycosylated and undergoes multimerization to form different molecular weight multimers before secretion. Adiponectin is one of the most abundant adipokines (μg/mL range) in the circulation. The concentrations are negatively correlated with adipose depot size, in particular with visceral fat mass in humans. Adiponectin exerts its effects by activating a range of different signaling molecules via binding to 2 transmembrane receptors, adiponectin receptor 1 and adiponectin receptor 2. The adiponectin receptor 1 is expressed primarily in the skeletal muscle, whereas adiponectin receptor 2 is predominantly expressed in the liver. Many of the functions of adiponectin are relevant to growth, lactation, and health and are thus of interest in both beef and dairy production systems. Studies on the role of the adiponectin protein in cattle have been impeded by the lack of reliable assays for bovine adiponectin. Although there are species-specific bovine adiponectin assays commercially available, they suffer from a lack of scientific peer-review of validity. Quantitative data about the adiponectin protein in cattle available in the literature emerged only during the last 3 yr and were largely based on Western blotting using either antibodies against human adiponectin or partial peptides from the bovine sequence. Using native bovine high-molecular-weight adiponectin purified from serum, we were able to generate a polyclonal antiserum that can be used for Western blot but also in an ELISA system, which was recently validated. The objective of this review is to provide an overview

  14. Globular adiponectin induces differentiation and fusion of skeletal muscle cells

    Tania Fiaschi; Domenico Cirelli; Giuseppina Comito; Stefania Gelmini; Giampietro Ramponi; Maria Serio; Paola Chiarugi

    2009-01-01

    The growing interest in skeletal muscle regeneration is associated with the opening of new therapeutic strategies for muscle injury after trauma, as well as several muscular degenerative pathologies, including dystrophies, muscu-lar atrophy, and cachexia. Studies focused on the ability of extracellular factors to promote myogenesis are therefore highly promising. We now report that an adipocyte-derived factor, globular adiponectin (gAd), is able to induce mus-cle gene expression and cell differentiation, gAd, besides its well-known ability to regulate several metabolic func-tions in muscle, including glucose uptake and consumption and fatty acid catabolism, is able to block cell cycle entry of myoblasts, to induce the expression of specific skeletal muscle markers such as myosin heavy chain or eaveolin-3, as well as to provoke cell fusion into multinucleated syneytia and, finally, muscle fibre formation, gAd exerts its pro-differentiative activity through redox-dependent activation of p38, Akt and 5'-AMP-activated protein kinase path-ways. Interestingly, differentiating myoblasts are autocrine for adiponectiu, and the mimicking of pro-inflammatory settings or exposure to oxidative stress strongly increases the production of the hormone from differentiating cells. These data suggest a novel function of adiponectin, directly coordinating the myogenic differentiation program and serving an autocrine function during skeletal myogenesis.

  15. Beneficial Effects of Adiponectin on Periodontal Ligament Cells under Normal and Regenerative Conditions

    Marjan Nokhbehsaim

    2014-01-01

    Full Text Available Type 2 diabetes and obesity are increasing worldwide and linked to periodontitis, a chronic disease which is characterized by the irreversible destruction of the tooth-supporting tissues, that is, periodontium. The mechanisms underlying the association of diabetes mellitus and obesity with periodontal destruction and compromised periodontal healing are not well understood, but decreased plasma levels of adiponectin, as found in diabetic and obese individuals, might be a critical mechanistic link. The aim of this in vitro study was to examine the effects of adiponectin on periodontal ligament (PDL cells under normal and regenerative conditions, and to study the regulation of adiponectin and its receptors in these cells. Adiponectin stimulated significantly the expression of growth factors and extracellular matrix, proliferation, and in vitro wound healing, reduced significantly the constitutive tumor necrosis factor-α expression, and caused a significant upregulation of its own expression. The beneficial actions of enamel matrix derivative on a number of PDL cell functions critical for periodontal regeneration were partially enhanced by adiponectin. The periodontopathogen Porphyromonas gingivalis inhibited the adiponectin expression and stimulated the expression of its receptors. In conclusion, reduced levels of adiponectin, as found in type 2 diabetes and obesity, may compromise periodontal health and healing.

  16. Relationship between Serum Umbilical Cord and Maternal Leptin and Adiponectin Concentrations with Fetal Growth Parameters

    F Zare

    2007-08-01

    Full Text Available Background: Pregnancy and accelerated fetal growth always are related with major metabolic changes and body fat redistribution and adiponectin is one of principle adipocyte hormones, so studying adiponectin changes during pregnancy may reveal some hidden parts of fetal metabolism. The aim of this study was to assess adiponectin and leptin levels in umbili¬cal cord and maternal serum, their relation with each other and with neonatal weight, birth length and other fetal growth markers. Methods: The study was carried out with 72 appropriate for age newborns (36 female, 36 male and their mothers. The anthropometric variables of the newborns studied were birth weight, birth length, and birth weight/birth length and ponderal in¬dex. Maternal and umbilical cord adiponectin and leptin levels were measured by ELISA and compared. Results: The median of cord blood adiponectin concentration were 3 fold higher than those of maternal group. Umbilical cord blood leptin levels were significantly correlated with neonatal birth weight and birth weight/ birth length (r= 0.29, P= 0.01 and r= 0.24, P= 0.04, respectively. No statistical difference has been demonstrated between both groups of male and fe¬male neonates regarding birth weight, birth length, maternal and neonatal leptin levels, ponderal index and maternal and neona¬tal adiponectin levels. Conclusion: Neonatal leptin is related to birth weight. Adiponectin has no relation with birth weight. Neither leptin nor adi¬ponectin correlated with gender difference.

  17. Relationship between Visceral Adiposity and Plasma Adiponectin Concentration: Effect of Weight Loss

    E Nasseri

    2008-05-01

    Full Text Available Background: Adiponectin is an anti-inflammatory and antiatherogenic protein that has a protective effect against athero­sclero­sis and diabetes. It is exclusively secreted by adipose tissue. Serum adiponectin levels are inversely associated with pa­rame­ters of overall adiposity including body mass index (BMI, fat mass, and percentage of body fat. Methods: In a cross-sectional study of 76 women we sought to evaluate if adiponectin is associated primarily with central adi­pos­ity rather than overall adiposity. We also assessed adiponectin changes after weight loss in a subgroup of 42 obese sub­jects.Results: Waist to hip ratio (WHR, an index of central obesity, was the only variable independently associated to adi­ponectin (Beta= 0.25, P< 0.05. A mean increase of 8.2±24.2% in adiponectin concentration was observed in response to the dietary restriction and weight loss (P= 0.03. Our findings provide evidence for association of serum adiponectin level with visceral fat, represented by waist to hip ratio index.Conclusion: Moderate weight loss result in significant improvements in adiponectin concentration and provide another bio­logi­cal explanation for the beneficial effect of body weight loss on reducing cardiovascular and diabetes risks in obese pa­tients.

  18. A preliminary study on correlation between adiponectin genotype polymorphisms and obstructive sleep apnea hypopnea syndrome

    CAO Juan; SU Shi-cheng; HUANG Han-peng; DING Ning; YIN Min; HUANG Mao; ZHANG Xi-long

    2012-01-01

    Background Obstructive sleep apnea hypopnea syndrome (OSAHS) is regarded as a disease with strong genetic background and associated with hypoadiponectinemia.It is worthwhile to investigate the possible correlation between the single nucleotide polymorphisms (SNPs) in the adiponectin gene and OSAHS.Methods With the TaqMan polymerase chain reaction (PCR) method,the SNPs at positions 45 and 276 in the adiponectin gene were determined in Chinese of Han nationality in Nanjing district consisting of 103 OSAHS patients (OSAHS group) and 67 normal controls (control group).The association of adiponectin genotype polymorphisms at positions 45 and 276 with OSAHS was analyzed.Results No evidence of a direct association was found between OSAHS and adiponectin genotype SNP at positions 45 and 276 (P >0.05).However,compared with those OSAHS patients having G/T+T/T genotype at position 276,the OSAHS patients with G/G genotype showed a longer neck circumference,a prolonged duration of the longest apnea event,and an elevated level of blood cholesterol and low-density lipoprotein cholesterol (P <0.05).Conclusions No direct association was suggested between OSAHS and adiponectin genotype distribution at positions 45 and 276 in Chinese of Han nationality in Nanjing district.However,in OSAHS patients,those with adiponectin G/G genotype at position 276,seemed to have a higher potential risk in development of OSAHS than those having adiponectin SNP276 G/T +T/T genotype.

  19. Adiponectin and cardiovascular risk factors in relation with glycemic control in type 2 diabetics

    Aniebetabasi S. Obot

    2013-08-01

    Full Text Available Background: Adiponectin has been associated with insulin resistance and dyslipidemia in Type 2 diabetes, though the mechanism of association is still uncertain. The adiponectin levels and lipid profile in relation to glycemic control were investigated in type 2 diabetics. Methods: Forty two diabetic subjects (35-64 years and 33 age-matched non-diabetic subjects were recruited into this case control study. Socio-demographic characteristics, anthropometric indices and blood pressure were obtained. Total cholesterol (TC, triglyceride (TG, low density lipoprotein (LDL, high density lipoprotein, (HDL, fasting plasma glucose (FPG, and glycated hemoglobin (HbA1c were estimated using colorimetric methods, atherogenic index (AI was calculated, while serum adiponectin was determined by ELISA method. Results: Adiponectin levels of type 2 diabetics were not significantly different from the non-diabetics studied (p>0.05. Higher TG levels were observed in diabetics with poor glycemic control compared with those with good glycemic control (p0.05. Conclusion: Type 2 diabetics do not have lower adiponectin levels. Gender, duration of diabetes and glycemic control does not seem to exert any influence on adiponectin levels in type 2 diabetes. Adiponectin may be associated with reduced risk of atherosclerosis through its effects on HDL cholesterol metabolism. [Int J Res Med Sci 2013; 1(4.000: 563-570

  20. Urinary adiponectin excretion rises with increasing albuminuria in type 1 diabetes

    Jorsal, Anders; Petersen, Emilie Hein; Tarnow, Lise;

    2013-01-01

    AIM: Urinary adiponectin (u-adiponectin) excretion has been suggested to reflect early glomerular damage. Inspired by this, we studied the levels of u-adiponectin in type 1 diabetic patients with different levels of urinary albumin excretion (UAE). METHODS: U-adiponectin was analysed by ELISA in...... type 1 diabetic patients: Fifty-eight with normoalbuminuria (<30mg albumin/24h), 43 with persistent microalbuminuria (30-300mg/24h) and 44 with persistent macroalbuminuria (>300mg/24h). For comparison, a control group of 55 healthy individuals was included. RESULTS: U-adiponectin increased with...... increasing levels of UAE (p<0.01). U-adiponectin median (interquartile range): Normoalbuminuria 0.38 (0.14-1.31), microalbuminuria 1.12 (0.20-2.68), macroalbuminuria 9.20 (1.10-23.35) and controls 0.09 (0.06-0.24) μg/g creatinine. Levels were unrelated to sex, age, cholesterol, diastolic BP and BMI. U-adiponectin...

  1. Association of adiponectin genotype polymorphisms at positions 45 and 276 with obstructive sleep apnea hypopnea syndrome

    Mei Su; Xilong Zhang; Shicheng Su

    2009-01-01

    Objective: To investigate the relationship between adiponectin genotype polymorphisms and obstructive sleep apnea hypopnea syndrome (OSAHS). Methods: Using the TaqMan polymerase chain reaction(PCR) method, the single nucleotide polymorphisms(SNP)at positions 45 and 276 in the adiponectin gene were determined in Chinese of the Han nationality in the Nanjing district. The OSAHS group consisted of 78 patients, and the control group contained 40 subjects. The association of adiponectin genotype polymorphisms at positions 45 and 276 with obstructive sleep apnea hypopnea syndrome was analyzed. Results: No evidence of a direct association was found between OSAHS and adiponectin genotype SNP at positions 45 and 276(P> 0.05). However, compared with those OSAHS patients having G/T+T/T genotype at position 276, the OSAHS patients with the G/G genotype showed a greater neck circumference(NC), a prolonged duration of the longest apnea event, and elevated levels of blood cholesterol and low-density lipoprotein cholesterol(P < 0.05). Conclusion: No direct association was detected between OSAHS and adiponectin genotype distribution at positions 45 and 276 in Chinese of Han nationality in the Nanjing district. However, OSAHS patients with the adiponectin GIG genotype at position 276 had a larger NC and the longest apnea event compared to those having the adiponectin SNP276 G/T +T/T genotype. This may have an indirect influence on the development of OSAHS.

  2. Metabolic syndrome in rheumatoid arthritis: role of adiponectin (preliminary results

    Yulia Nikolaevna Gorbunova

    2013-01-01

    Full Text Available The clinical value of the disorders and diseases integrated within the metabolic syndrome (MS is in the combination of traditional risk factors for cardiovascular diseases (CVD, which significantly accelerates the development of cardiovascular events (CVEs. The detection rate for MS in patients with rheumatoid arthritis (RA is shown to be higher than in the controls regardless of the diagnostic criteria for MS. At present, there are confusing data on the role of adipokins in RA. Objective: to determine the rate of MS and its components in RA patients and the association of the level of adipokin (adiponectin with the components of MS in relation to the duration of RA. Subjects and methods: The investigation enrolled 69 RA patients divided into two groups: 1 34 patients with early-stage (<2-year RA and 2 35 patients with end-stage (>2-year RA. Results. MS occurred in 12 (17.4% of the 69 patients with RA. There was central (abdominal obesity in 37 (53.6% patients with RA, hypertension in 29 (42%, low high-density cholesterol levels in 20 (29%, hyperglycemia in 11 (15.9%, and hypertriglyceridemia in 10 (14.5%. According to the presence or absence of MS, the patients were divided into 2 groups: 1 12 patients with MS; 2 57 without MS. In the patients with RA and MS, the duration of the disease was shorter; DAS28 and CDAI were higher than in those without MS: 15.4 [7; 24] months versus 51.8 [6; 72] months; DAS28 was 5.8 [4.9; 6.7] scores versus 5.1 [4.5; 5.8] scores; CDAI: 34.8 [21.8; 41.4] scores versus 24.2 [18; 31] scores, respectively (p < 0.05 in all cases. The serum level of adiponectin was lower: 13.1 [5.7; 10.7] ng/ml versus 20.6 [6.9; 30.9] ng/ml in the patients with RA and MS as compared to those without MS; but there were no significant differences. In the patients with early-end RA, the rate of MS was twice higher than that in those with end-stage RA; however, the differences were statistically insignificant (p = 0.1. The components of MS

  3. The aporphine alkaloid boldine induces adiponectin expression and regulation in 3T3-L1 cells.

    Yu, Bangning; Cook, Carla; Santanam, Nalini

    2009-10-01

    Adiponectin is an adipokine secreted by differentiated adipocytes. Clinical studies suggest a negative correlation between oxidative stress and adiponectin levels in patients with metabolic syndrome or cardiovascular disease. Natural compounds that can prevent oxidative stress mediated inhibition of adiponectin may be potentially therapeutic. Boldine, an aporphine alkaloid abundant in the medicinal plant Peumus boldus, is a powerful antioxidant. The current study demonstrates the effects of boldine on the expression of adiponectin and its regulators, CCAAT/enhancer binding protein-alpha (C/EBPalpha) and peroxisome proliferator-activated receptor (PPAR)-gamma, in 3T3-L1 cells. Differentiated 3T3-L1 adipocytes were exposed to either hydrogen peroxide (H(2)O(2)) (100 microM) or tumor necrosis factor-alpha (TNFalpha) (1 ng/mL) for 24 hours in the presence or absence of increasing concentrations of boldine (5-100 microM). Quantitative polymerase chain reaction showed that both the oxidants decreased the mRNA levels of adiponectin, PPARgamma, and C/EBPalpha to half of the control levels. Boldine, at all concentrations, counteracted the inhibitory effect of H(2)O(2) or TNFalpha and increased the expression of adiponectin and its regulators. The effect of boldine on adiponectin expression was biphasic, with the lower concentrations (5-25 microM) having a larger inductive effect compared to higher concentrations (50-100 microM). Boldine treatment alone in the absence of H(2)O(2) or TNFalpha was also able to induce adiponectin at the inductive phase of adipogenesis. Peroxisome proliferator response element-luciferase promoter transactivity analysis showed that boldine interacts with the PPAR response element and could potentially modulate PPAR responsive genes. Our results indicate that boldine is able to modulate the expression of adiponectin and its regulators in 3T3-L1 cells and has the potential to be beneficial in obesity-related cardiovascular disease. PMID:19857072

  4. Waist circumference does not predict circulating adiponectin levels in sub-Saharan women

    Gautier Jean-François

    2007-10-01

    Full Text Available Abstract Background Because of previously reported ethnic differences in determinants and markers of obesity and related metabolic disorders, we sought to investigate circulating levels of adiponectin and their correlates in a sub-Saharan African (sSA population. Subjects and Methods We studied 70 non-diabetic volunteers (33M/37F living in Yaoundé, Cameroon, aged 24–69 yr, with BMI 20–42 kg/m2. In all participants we measured waist circumference and total body fat by bioimpedance, and obtained a fasting venous blood sample for measurement of plasma glucose, serum insulin and adiponectin concentrations. We performed a euglycaemic hyperinsulinaemic clamp in 1/4 subjects, and HOMAIR was used as surrogate of fasting insulin sensitivity index since it best correlates to clamp measurements. Results Males had lower adiponectin levels than females (8.8 ± 4.3 vs. 11.8 ± 5.5 μg/L. There was no significant correlation between adiponectin and total body fat (rs = -0.03; NS, whereas adiponectin was inversely correlated with waist circumference (rs = -0.39; p = 0.001. Adiponectin correlated negatively with insulin resistance (rs = -0.35; p = 0.01. In a regression analysis using fasting adiponectin concentration as the dependent variable, and age, HOMAIR, waist circumference, and fat mass as predictors, waist circumference (β = -3.30; p = 0.002, fat mass (β = -2.68; p = 0.01, and insulin resistance (β = -2.38; p = 0.02 but not age (β = 1.11; p = 0.27 were independent predictors of adiponectin. When considering gender, these relations persisted with the exception of waist circumference in females. Conclusion Adiponectin correlates in this study population are comparable to those observed in Caucasians with the exception of waist circumference in women. The metabolic significance of waist circumference is therefore questioned in sSA women.

  5. Temporal and Molecular Analyses of Cardiac Extracellular Matrix Remodeling following Pressure Overload in Adiponectin Deficient Mice.

    Keith Dadson

    Full Text Available Adiponectin, circulating levels of which are reduced in obesity and diabetes, mediates cardiac extracellular matrix (ECM remodeling in response to pressure overload (PO. Here, we performed a detailed temporal analysis of progressive cardiac ECM remodelling in adiponectin knockout (AdKO and wild-type (WT mice at 3 days and 1, 2, 3 and 4 weeks following the induction of mild PO via minimally invasive transverse aortic banding. We first observed that myocardial adiponectin gene expression was reduced after 4 weeks of PO, whereas increased adiponectin levels were detected in cardiac homogenates at this time despite decreased circulating levels of adiponectin. Scanning electron microscopy and Masson's trichrome staining showed collagen accumulation increased in response to 2 and 4 weeks of PO in WT mice, while fibrosis in AdKO mice was notably absent after 2 weeks but highly apparent after 4 weeks of PO. Time and intensity of fibroblast appearance after PO was not significantly different between AdKO and WT animals. Gene array analysis indicated that MMP2, TIMP2, collagen 1α1 and collagen 1α3 were induced after 2 weeks of PO in WT but not AdKO mice. After 4 weeks MMP8 was induced in both genotypes, MMP9 only in WT mice and MMP1α only in AdKO mice. Direct stimulation of primary cardiac fibroblasts with adiponectin induced a transient increase in total collagen detected by picrosirius red staining and collagen III levels synthesis, as well as enhanced MMP2 activity detected via gelatin zymography. Adiponectin also enhanced fibroblast migration and attenuated angiotensin-II induced differentiation to a myofibroblast phenotype. In conclusion, these data indicate that increased myocardial bioavailability of adiponectin mediates ECM remodeling following PO and that adiponectin deficiency delays these effects.

  6. Adiponectin is a Good Marker for Metabolic State among Type 1 Diabetes Mellitus Patients

    Hamdollah Karamifar

    2013-06-01

    Full Text Available Objective: Adiponectin is secreted from adipose tissue. This hormone has a fundamental role in pathogenesis of insulin resistance, and has anti-inflammatory and anti-atherogenic effects. The objectives of this study were to compare serum adiponectin level between type 1 diabetics and healthy people and to assess its related factors, and also to determine the relationship between adiponectin and metabolic state.Methods: This was a case control study involving 60 diabetics (25 good and 35 poor metabolic controlled and 28 healthy persons (younger than 18 years old. The data about demographic (age and sex, clinical and paraclinical characteristics [body mass index (BMI, duration of disease, puberty state, and glycosylated hemoglobin (HbA1c and adiponectin level in serum] were collected. Determinants of adiponectin were assessed using univariate and multiple linear regression analyses.Findings: Mean (±SD serum adiponectin level in healthy persons, good-controlled and poor-controlled type 1 diabetes mellitus patients were 9.16 (±4.2 μg/cc, 10.89 (±4.48μg/cc, and 15.92 (±8.26μg/cc, respectively. Post hoc analysis revealed that differences of adiponectin between poor- and good-controlled type 1 diabetes mellitus patients (P=0.01 and between healthy persons and poor controlled type 1 diabetes mellitus (P<0.0001 were statistically significant. Adiponectin level was associated with puberty state and BMI in healthy persons. It was associated with puberty state and HbA1c in type 1 diabetic persons.Conclusion: Serum level of adiponectin was higher in type 1 diabetics than in healthy persons and it can be used as a good marker for metabolic control state among diabetics.

  7. Leptin and Adiponectin Levels in Patients with Chronic Hepatitis C with Carbohydrate and Lipid Metabolism Disorders

    T. V. Antonova

    2014-01-01

    Full Text Available Aim: to analyze leptin and adiponectin serum levels in patients with chronic hepatitis C in comparison with metabolic syndrome components, biochemical features and stage of hepatitis.Materials and methods: In 93 patients with chronic HCV in age 20-55 with a few symptomatic HCV-infection and minimal liver fibrosis stage serum leptin and adiponectin was measured. Associations between leptin, adiponectin and metabolic abnormalities, biochemical features, and hepatic fibrosis were determined.Results: Abdominal obesity was revealed at 40% patients, overweight – at 41%, insulin resistance – at 36,6% cases. The leptin and adiponectin levels were within normal limits range at most patients. Patients with minimal liver fibrosis had higher index of leptin by comparison to patients with moderate and severe fibrosis (r= – 0,402, р= 0,018. In patients with HCV genotype 3a the adiponectin level was below, than in HCV genotype 1b. Patients with abdominal obesity and overweight had higher leptin and lower adiponectin indexes by comparison to patients without these metabolic abnormalities. Direct cross-correlation between the leptin level and body mass index (r=0,358, p=0,001, waist circumference (r=0,292, p=0,01; negative cross-correlation between the adiponectin level and body mass index (r=- 0,435, р <0,021, waist circumference (r=- 0,386, р =0,001 were displayed.Conclusion: Leptin and adiponectin blood levels in HCVpatientis associated with abdominal obesity and overweight. The connection of leptin level and liver fibrosis stage was revealed. Difference of adiponectin level in HCV-patients with 3a and 1b genotypes of virus was found.

  8. High-fat diet and glucocorticoid treatment cause hyperglycemia associated with adiponectin receptor alterations

    Oller do Nascimento Cláudia

    2011-01-01

    Full Text Available Abstract Background Adiponectin is the most abundant plasma protein synthesized for the most part in adipose tissue, and it is an insulin-sensitive hormone, playing a central role in glucose and lipid metabolism. In addition, it increases fatty acid oxidation in the muscle and potentiates insulin inhibition of hepatic gluconeogenesis. Two adiponectin receptors have been identified: AdipoR1 is the major receptor expressed in skeletal muscle, whereas AdipoR2 is mainly expressed in liver. Consumption of high levels of dietary fat is thought to be a major factor in the promotion of obesity and insulin resistance. Excessive levels of cortisol are characterized by the symptoms of abdominal obesity, hypertension, glucose intolerance or diabetes and dyslipidemia; of note, all of these features are shared by the condition of insulin resistance. Although it has been shown that glucocorticoids inhibit adiponectin expression in vitro and in vivo, little is known about the regulation of adiponectin receptors. The link between glucocorticoids and insulin resistance may involve the adiponectin receptors and adrenalectomy might play a role not only in regulate expression and secretion of adiponectin, as well regulate the respective receptors in several tissues. Results Feeding of a high-fat diet increased serum glucose levels and decreased adiponectin and adipoR2 mRNA expression in subcutaneous and retroperitoneal adipose tissues, respectively. Moreover, it increased both adipoR1 and adipoR2 mRNA levels in muscle and adipoR2 protein levels in liver. Adrenalectomy combined with the synthetic glucocorticoid dexamethasone treatment resulted in increased glucose and insulin levels, decreased serum adiponectin levels, reduced adiponectin mRNA in epididymal adipose tissue, reduction of adipoR2 mRNA by 7-fold in muscle and reduced adipoR1 and adipoR2 protein levels in muscle. Adrenalectomy alone increased adiponectin mRNA expression 3-fold in subcutaneous adipose

  9. Reference values for serum total adiponectin in healthy non-obese children and adolescents

    Lausten-Thomsen, Ulrik; Christiansen, Michael; Fonvig, Cilius Esmann;

    2015-01-01

    : A total of 1193 healthy, non-obese Danish schoolchildren (730 girls, 463 boys) aged 6-18years (median 11.9) were examined by trained medical staff. Total serum adiponectin concentrations in venous fasting blood samples were quantitated by a DuoSet® ELISA human Adiponectin/Acrp30 (R&D Systems) following...... reference levels for total serum adiponectin in a sample of 1193 Danish children and adolescents aged 6-18years. A correlation with age was demonstrated in children, but no significant difference was seen between the sexes....

  10. Association of Metabolic Syndrome with the Adiponectin to Homeostasis Model Assessment of Insulin Resistance Ratio

    Yu-Song Ding; Shu-Xia Guo; Ru-Lin Ma; Shu-Gang Li; Heng Guo; Jing-Yu Zhang; Mei Zhang; Jia-Ming Liu; Jia He; Yi-zhong Yan; Wen-Jie Zhang; Lie-Gang Liu

    2015-01-01

    This study aimed at determining whether the adiponectin to HOMA-IR (A/H) ratio is associated with MetS and MetS components and comparing the diagnostic efficacy of adiponectin, HOMA-IR, and the A/H ratio in healthy, middle-aged participants. MetS was assessed in 1628 Kazakh participants (men, 768; women, 860). The associations between adiponectin, HOMA-IR, and the A/H ratio with the components of MetS and MetS were examined using logistic regression analysis and receiver operating characteris...

  11. Association between multimeric adiponectin and free leptin index with atherogenic dyslipidemia in non-diabetic obese men

    Candra Ninghayu

    2011-05-01

    Full Text Available Background: To analyze the role of various adiponectin and free leptin index on the occurrence of atherogenic dislipidemia in non-diabetic central obese men.Methods: This is a cross-sectional study on 120 non-diabetic central obese men that was done in Jakarta. The measured indicators were total adiponectin, high molecular weight adiponectin (HMW adiponectin, medium molecular weight adiponectin (MMW adiponectin, low molecular weight adiponectin (LMW adiponectin, leptin, soluble leptin receptor, triglycerides, high-density lipoprotein cholesterol (HDL cholesterol, low density lipoprotein cholesterol (LDL cholesterol and apolipoprotein B (Apo B. Atherogenic dyslipidemia was characterized by reduced level of HDL cholesterol, and high levels of triglyceride and small dense LDL (sdLDL. Ratio of LDL cholesterol and Apo B were calculated to get sdLDL. Free Leptin Index (FLI was the ratio between total leptin and soluble leptin receptor (sOB-R, and median values were used as cut off to defi ne high and low values of each parameter. Cross tabulation were done on categorical data. Relationships between multimeric adiponectin and free leptin index with atherogenic lipids were analyzed by using Spearman analysis. Further, the interaction of all indicators with the occurence of atherogenic dyslipidemia was analyzed using binary logistic regression.Results: A negative correlation of HMW adiponectin with atherogenic dyslipidemia (p < 0.05, whereas there were no correlation between MMW adiponectin and LMW adiponectin with atherogenic dyslipidemia (p > 0.05. Free Leptin Index was associated positively with atherogenic dyslipidemia (p < 0.05. Odds Ratio (OR of HMW adiponectin for the occurrence of atherogenic dyslipidemia was 3.62 (p < 0.05, where as OR of FLI with atherogenic dyslipidemia was 4.57 (p < 0.05.Conclusion: HMW Adiponectin and FLI might contribute to atherogenic dyslipidemia in central obese non-diabetic males. (Med J Indones 2011; 20

  12. Associations of Adiponectin with Adiposity, Insulin Sensitivity, and Diet in Young, Healthy, Mexican Americans and Non-Latino White Adults

    Rocio I. Pereira

    2015-12-01

    Full Text Available Low circulating adiponectin levels may contribute to higher diabetes risk among Mexican Americans (MA compared to non-Latino whites (NLW. Our objective was to determine if among young healthy adult MAs have lower adiponectin than NLWs, independent of differences in adiposity. In addition, we explored associations between adiponectin and diet. This was an observational, cross-sectional study of healthy MA and NLW adults living in Colorado (U.S.A.. We measured plasma total adiponectin, adiposity (BMI, and visceral adipose tissue, insulin sensitivity (IVGTT, and self-reported dietary intake in 43 MA and NLW adults. Mean adiponectin levels were 40% lower among MA than NLW (5.8 ± 3.3 vs. 10.7 ± 4.2 µg/mL, p = 0.0003, and this difference persisted after controlling for age, sex, BMI, and visceral adiposity. Lower adiponectin in MA was associated with lower insulin sensitivity (R2 = 0.42, p < 0.01. Lower adiponectin was also associated with higher dietary glycemic index, lower intake of vegetables, higher intake of trans fat, and higher intake of grains. Our findings confirm that ethnic differences in adiponectin reflect differences in insulin sensitivity, but suggest that these are not due to differences in adiposity. Observed associations between adiponectin and diet support the need for future studies exploring the regulation of adiponectin by diet and other environmental factors.

  13. ADIPONECTIN LEVELS AND ATHEROSCLEROTIC RISK FACTORS IN CHILDREN ON HEMODIALYSIS

    Atherosclerotic cardiovascular disease (ACVD) is the major cause of mortality in patients with end stage renal disease (ESRD) treated with hemodialysis (HD), even in children. Adiponectin (ADPN) is an adipocyte derived plasma protein having anti-atherogenic properties. ADPN levels are elevated in ESRD but it has been reported that ESRD patients with low plasma ADPN levels have a high risk of cardiovascular death. The aim of this study is to evaluate the relation between ADPN and atherosclerotic risk factors in children on hemodialysis.Twenty-eight children (17 boys and 11girls) with a mean age of 10.6 ± 3.34 years undergoing hemodialysis (HD) for a mean period of 11.96 ± 8.32 months (ranged from 6 to 36 months) and 10 healthy age and sex matched control subjects were enrolled in this study. The acute effect of a hemodialysis session on serum ADPN and other atherosclerotic risk factors , including blood pressure, serum lipids, C-reactive protein (CRP) and tumor necrosis factor-α (TNF-α) were assessed by comparison of pre- and post-hemodialysis determinations. Serum levels of ADPN and TNF-α were measured by enzyme linked immunosorbant assay (ELISA) while CRP was measured by the semi-quantitative latex agglutination assay.The data showed that serum ADPN levels were twice higher in the HD group as compared to the control subjects. Concerning the atherosclerotic risk factors, TNF-α, CRP and triglycerides levels showed significant elevation in the HD group. Meanwhile, serum albumin, cholesterol and phosphorus levels showed significant decreases. The linear regression analysis showed that adiponectin was negatively correlated with glomerular filtration rate (GFR) (r = -0.68,P < 0.0001), and body mass index (r = -0.73, P < 0.0007); ADPN levels are directly related to HDL cholesterol levels (r = 0.76, P < 0.0001) and inversely related to triglycerides level (r = -0.63, P < 0.0003). No relationship was found between adiponectin and CRP.It could be concluded that

  14. Serum Asymmetric Dimethylarginine, and Adiponectin as Predictors of Atherosclerotic Risk among Obese Egyptian Children

    Enas R. Abdel Hameed

    2014-06-01

    CONCLUSIONS: Our results revealed that ADMA, Adiponectin and lipid profile can be considered as predictive biomarkers in prediction and prevention of atherosclerotic risk in the future among overweight and obese Egyptian children.

  15. Quercetin enhances adiponectin secretion by a PPAR-gamma independent mechanism

    Wein, Silvia; Behm, Norma; Petersen, Rasmus Koefoed;

    2010-01-01

    weekly, and plasma concentrations of adiponectin, leptin, insulin, glucose, triacylglycerols, total cholesterol, as well as of markers of inflammation and oxidative stress were measured (12h fasted) at the end of the feeding period. Adiponectin and peroxisome-proliferator-activated-receptor (PPAR...... WAT mRNA levels of adiponectin were elevated compared with the HF group, however, PPAR-gamma mRNA concentration in WAT was decreased (HFQ vs. HF). Compared to both other groups quercetin feeding significantly reduced oxidative stress, measured by plasma 8-iso-PGF(2alpha), while body weight gain, body...... composition and plasma leptin levels were not affected. Neither quercetin nor its metabolites induced PPAR-gamma-mediated transactivation in vitro. Adiponectin stimulating effects of quercetin are PPAR-gamma-independent and prevent impairment of insulin sensitivity without affecting body weight and...

  16. Elevated levels of high-molecular-weight adiponectin in type 1 diabetes

    Leth, H.; Andersen, K.K.; Frystyk, J.;

    2008-01-01

    BACKGROUND: Several studies have shown that type 1 diabetic patients have elevated total levels of the adipocyte-derived adipocytokine adiponectin. However, adiponectin circulates in three different subforms, and the high-molecular-weight (HMW) subform is believed to be the primary biologically...... active form. The effects of the medium-molecular-weight (MMW) subform and the low-molecular-weight (LMW) subform are still unresolved. PURPOSE: The objective of the study was to investigate the distribution of the three molecular subforms of adiponectin in well-characterized groups of type 1 diabetics...... measured using a validated in-house time-resolved immunoflourometric assay after separation by fast protein liquid chromatography. RESULTS: The absolute concentrations of total adiponectin and all subforms were higher in type 1 diabetic patients than healthy controls. However, the relative HMW fraction was...

  17. The association of asthma, nasal allergies, and positive skin prick tests with obesity, leptin, and adiponectin

    Newson, R. B.; Jones, M.; Forsberg, B.;

    2014-01-01

    BackgroundCross-sectional and longitudinal reports show that obese adults have more asthma than non-obese adults. A proposed mechanism is via effects of adipokines (leptin and adiponectin) on the immune system. ObjectiveWe wished to measure the associations of asthma and other atopic diseases with...... survey, embedded in a larger multi-centre cross-sectional postal survey, involving, with a case/control design, enrichment of the sample with subjects with asthma and chronic rhinosinusitis (CRS). We recorded serum leptin or adiponectin in 845 men and 1110 women in 15 centres and also anthropometric......, adjusting for confounders (area, age, smoking history, and number of elder siblings) and also mutually adjusting associations with adipokines and fatness measures. ResultsOne thousand nine hundred and fifty-five subjects aged 16-77years had information on leptin or adiponectin levels. Leptin and leptin/adiponectin...

  18. Low Adiponectin Levels and Increased Risk of Type 2 Diabetes in Patients With Myocardial Infarction

    Lindberg, Søren; Jensen, Jan S; Pedersen, Sune H;

    2014-01-01

    OBJECTIVE: Patients with acute myocardial infarction (MI) have increased risk of developing type 2 diabetes mellitus (T2DM). Adiponectin is an insulin-sensitizing hormone produced in adipose tissue, directly suppressing hepatic gluconeogenesis, stimulating fatty acid oxidation and glucose uptake in...... skeletal muscle and insulin secretion. In healthy humans, low plasma adiponectin levels associate with increased risk of T2DM; however, the relationship between adiponectin and T2DM in patients with MI has never been investigated. RESEARCH DESIGN AND METHODS: We prospectively included 666 patients with ST......-segment elevation MI, without diabetes, treated with percutaneous coronary intervention, from September 2006 to December 2008 at a tertiary cardiac center. Blood samples were drawn before intervention, and total plasma adiponectin was measured in all samples. During follow-up (median 5.7 years [interquartile range...

  19. Significance of adiponectin in the risk of coronary lesions in patients with impaired glucose regulation

    黄珊

    2013-01-01

    Objective To investigate the association of impaired glucose regulation and adiponectin(APN) with the clinical severity of coronary lesions. Methods A total of 210 cases of suspected coronary heart disease were examined

  20. Adiponectin and peak bone mass in men: a cross-sectional, population-based study

    Frost, M; Abrahamsen, B; Nielsen, T L;

    2010-01-01

    Adiponectin, a protein classically known to be secreted by adipocytes, is also secreted by bone-forming cells. Results of previous studies have been contradictory as to whether serum adiponectin and bone mineral density (BMD) are associated. The aim of this study was to investigate a possible...... association between serum adiponectin and BMD in young, healthy men at a time of peak bone mass. BMD in the femoral neck, total hip, and lumbar spine were measured in this population-based cross-sectional study of 700 men aged 20-29 years participating in the Odense Androgen Study. Magnetic resonance imaging...... of femoral cortical thickness and bone marrow size was performed in a subsample of 363 participants. The associations between serum adiponectin and various bone measures were investigated by means of regression analyses with adjustment for potential confounding variables. An inverse association was...

  1. Effect of repeated US stimulation on adiponectin secretion by adipocytes of obese human subjects

    Fujii, Yasutomo; Taniguchi, Nobuyuki; Satoh, Masaaki; Irie, Takasuke; Itoh, Kouichi

    2006-05-01

    To clarify the effect of the repeated sonication on the adiponectin secretion by adipocytes obtained from obese subjects. Using 1-MHz continuous-wave ultrasound at an intensity of 0.50 or 2.1 W/cm2, we sonicated culture flasks of subcutaneous adipocytes obtained from obese human subjects, in a series of 3 sessions of US stimulation applied for a daily total of 15 min. For the measurement of adiponectin secretion, 50 μl of the culture medium was collected from each flask every 24 h after the 1st stimulation. Quantification of adiponectin protein levels in cell culture supernatants was performed with a commercially available ELISA kit recommended by the manufacturer. The adiponectin concentrations in the culture medium of the US stimulation groups rose significantly (padiponectin secretion in obese human adipocytes.

  2. Diet-induced weight loss and exercise alone and in combination enhance the expression of adiponectin receptors in adipose tissue and skeletal muscle, but only diet-induced weight loss enhanced circulating adiponectin

    Christiansen, Tore; Paulsen, Søren K; Bruun, Jens M;

    2009-01-01

    Objective: The aim of the study was to investigate the effect of weight loss and exercise independently and in combination on circulating levels of adiponectin including low molecular weight, medium molecular weight, and high molecular weight adiponectin and expression of adiponectin and...... adiponectin receptors (AdipoR) in adipose tissue (AT) and skeletal muscle (SM). Design and Methods: Seventy-nine obese males and females were randomized into the following: 1) exercise only (12 wk of exercise without diet restriction); 2) hypocaloric diet [8 wk of very low energy diet (600 kcal/d) followed by...... wk. The molecular subforms of adiponectin in serum were determined by Western blot. Results: The mRNA expression of AdipoR1 and -2 in SM was increased significantly in the exercise-only and DEX groups (both P < 0.05). The mRNA expression of adiponectin and AdipoRs in AT was increased significantly in...

  3. Adiponectin Induces A20 Expression in Adipose Tissue To Confer Metabolic Benefit

    Hand LE, Usan P, Cooper GJS, Xu LY, Ammori B, Cunningham PS, Aghamohammadzadeh R, Soran H, Greenstein A, Loudon ASI, Bechtold DA, Ray DW

    2014-01-01

    Obesity is a major risk factor for metabolic disease, with white adipose tissue (WAT) inflammation emerging as a key underlying pathology. We detail that mice lacking Reverbα exhibit enhanced fat storage without the predicted increased WAT inflammation or loss of insulin sensitivity. In contrast to most animal models of obesity and obese human patients, Reverbα−/− mice exhibit elevated serum adiponectin levels and increased adiponectin secretion from WAT explants in vitro, highlighting ...

  4. A Microfluidic Interface for the Culture and Sampling of Adiponectin from Primary Adipocytes

    Godwin, Leah A.; Brooks, Jessica C.; Hoepfner, Lauren D.; Wanders, Desiree; Robert L. Judd; Easley, Christopher J.

    2015-01-01

    Secreted from adipose tissue, adiponectin is a vital endocrine hormone that acts in glucose metabolism, thereby establishing its crucial role in diabetes, obesity, and other metabolic disease states. Insulin exposure to primary adipocytes cultured in static conditions has been shown to stimulate adiponectin secretion. However, conventional, static methodology for culturing and stimulating adipocytes falls short of truly mimicking physiological environments. Along with decreases in experimenta...

  5. Metabolic dysfunction associated with adiponectin deficiency enhances kainic acid-induced seizure severity

    Lee, Edward B; Warmann, Genevieve; Dhir, Ravindra; Ahima, Rexford S.

    2011-01-01

    Metabolic syndrome has deleterious effects on the central nervous system, and recent evidence suggests that obesity rates are higher at presentation in children who develop epilepsy. Adiponectin is secreted by adipose tissue and acts in the brain and peripheral organs to regulate glucose and lipid metabolism. Adiponectin deficiency predisposes toward metabolic syndrome, characterized by obesity, insulin resistance, impaired glucose tolerance, hyperlipidemia, and cardiovascular morbidity. To i...

  6. Plasma Adiponectin and Insulin Resistance in Korean Type 2 Diabetes Mellitus

    Kim, Mi-Jin; Yoo, Kwang-Ha; Park, Hyung-Suk; Chung, Sang-Man; Jin, Choon-Jo; Lee, Yoen; Shin, Young-Goo; Chung, Choon-Hee

    2005-01-01

    Insulin resistance, which implies impairment of insulin signaling in the target tissues, is a common cause of type 2 diabetes. Adipose tissue plays an important role in insulin resistance through the dysregulated production and secretion of adipose-derived proteins, including tumor necrosis factor-α, plasminogen activator inhibitor-1, leptin, resistin, angiotensinogen, and adiponectin. Adiponectin was estimated to be a protective adipocytokine against atherosclerosis, and also to have an anti...

  7. Adiponectin as a Protective Factor Against the Progression Toward Type 2 Diabetes Mellitus in Postmenopausal Women

    Darabi, Hossein; Raeisi, Alireza; Kalantarhormozi, Mohammad Reza; Ostovar, Afshin; Assadi, Majid; Asadipooya, Kamyar; Vahdat, Katayoun; Dobaradaran, Sina; Nabipour, Iraj

    2015-01-01

    Abstract Serum adiponectin levels have been suggested to be predictors of type 2 diabetes mellitus in diverse populations. However, the relationship between circulating adiponectin levels and the risk of development of type 2 diabetes in postmenopausal women has not been investigated. A total of 382 healthy postmenopausal women who participated in a prospective cohort study were followed for 5.8 years. Type 2 diabetes mellitus was defined according to the criteria set out by the American Diab...

  8. Adiponectin alleviates contractile dysfunction of genioglossus in rats exposed to chronic intermittent hypoxia

    WANG Wen-jing; LU Gan; DING Ning; HUANG Han-peng; DING Wen-xiao; ZHANG Xi-long

    2013-01-01

    Background Genioglossal dysfuntion takes an important role in pathogenesis of obstructive sleep apnea hypopnea syndrome (OSAHS) in which chronic intermittent hypoxia (CIH) is the major pathological origin.Recent studies have suggested genioglossal injury induced by CIH might be improved by adiponectin.The aim of this study was to investigate the effects of adiponectin on genioglossus contractile properties in rats exposed to CIH.Methods Thirty-nine healthy male Wistar rats were randomly divided into three groups:normal control (NC),CIH and adiponectin supplement (CIH+Ad) with 13 rats in each.Rats in NC were kept breathing normal air,while rats in CIH and CIH+Ad experienced the same CIH environment eight hours per day for 35 successive days.Rats in CIH+Ad were given intravenous adiponectin of 10 μg twice a week for 30 successive days.Rats in the NC and CIH were injected with normal saline as a control.After 35 days' CIH exposure,the levels of serum adiponectin and genioglossus contractile properties were compared.Results Serum adiponectin level was significantly lower in CIH than in NC (1210 ng/ml vs.2236 ng/ml).Serum adiponectin level in CIH+Ad (1844 ng/ml) was significantly higher than CIH but lower than NC.Twitch tension,time to peak tension,half relaxation time and tetanic tension were significantly lower in CIH than NC and improved in CIH+Ad.All mean tetanic fatigue indices decreased more rapidly in the first 20 seconds than during the subsequent 100 seconds.Tetanic fatigue indices in NC and CIH+Ad were significantly higher compared to CIH.Conclusions CIH could lead to hypoadiponectinaemia,impaired genioglossus contractile properties and decreased fatigue resistance in rats.Such changes could be partially offset by supplementation of adiponectin.

  9. Adiponectin is associated with risk of the metabolic syndrome and insulin resistance in women

    King, George A.; Deemer, Sarah E.; Thompson, Dixie L

    2010-01-01

    The purpose of this study was to examine insulin resistance, markers of the metabolic syndrome, cardiovascular disease (CVD) risk, and serum adiponectin concentrations in pre-menopausal Hispanic and non-Hispanic White (NHW) women. This cross-sectional study examined 119 pre-menopausal women (76 Hispanic, 45 NHW) for markers of the metabolic syndrome (ATP III criteria), level of insulin resistance (HOMA-IR), CVD risk factors, and serum total adiponectin concentrations. Relationships between va...

  10. Globular adiponectin induces a pro-inflammatory response in human astrocytic cells

    Wan, Zhongxiao; Mah, Dorrian; Simtchouk, Svetlana [School of Health and Exercise Sciences, University of British Columbia Okanagan, Kelowna, BC (Canada); Klegeris, Andis [Department of Biology, University of British Columbia Okanagan, Kelowna, BC (Canada); Little, Jonathan P., E-mail: jonathan.little@ubc.ca [School of Health and Exercise Sciences, University of British Columbia Okanagan, Kelowna, BC (Canada)

    2014-03-28

    Highlights: • Adiponectin receptors are expressed in human astrocytes. • Globular adiponectin induces secretion of IL-6 and MCP-1 from cultured astrocytes. • Adiponectin may play a pro-inflammatory role in astrocytes. - Abstract: Neuroinflammation, mediated in part by activated brain astrocytes, plays a critical role in the development of neurodegenerative disorders, including Alzheimer’s disease (AD). Adiponectin is the most abundant adipokine secreted from adipose tissue and has been reported to exert both anti- and pro-inflammatory effects in peripheral tissues; however, the effects of adiponectin on astrocytes remain unknown. Shifts in peripheral concentrations of adipokines, including adiponectin, could contribute to the observed link between midlife adiposity and increased AD risk. The aim of the present study was to characterize the effects of globular adiponectin (gAd) on pro-inflammatory cytokine mRNA expression and secretion in human U373 MG astrocytic cells and to explore the potential involvement of nuclear factor (NF)-κB, p38 mitogen-activated protein kinase (MAPK), extracellular signal-regulated kinase (ERK)1/2, c-Jun N-terminal kinase (JNK) and phosphatidylinositide 3-kinases (PI3 K) signaling pathways in these processes. We demonstrated expression of adiponectin receptor 1 (adipoR1) and adipoR2 in U373 MG cells and primary human astrocytes. gAd induced secretion of interleukin (IL)-6 and monocyte chemoattractant protein (MCP)-1, and gene expression of IL-6, MCP-1, IL-1β and IL-8 in U373 MG cells. Using specific inhibitors, we found that NF-κB, p38MAPK and ERK1/2 pathways are involved in gAd-induced induction of cytokines with ERK1/2 contributing the most. These findings provide evidence that gAd may induce a pro-inflammatory phenotype in human astrocytes.

  11. Gender Differences in Adiponectin Modulation of Cardiac Remodeling in Mice Deficient in Endothelial Nitric Oxide Synthase

    Durand, Jorge L.; Nawrocki, Andrea R.; Scherer, Philipp E.; Jelicks, Linda A.

    2012-01-01

    Left ventricular hypertrophy (LVH) is a risk factor for cardiovascular disease, a leading cause of death. Alterations in endothelial nitric oxide synthase (eNOS), an enzyme involved in regulating vascular tone, and in adiponectin, an adipocyte-derived secretory factor, are associated with cardiac remodeling. Deficiency of eNOS is associated with hypertension and LVH. Adiponectin exhibits vaso-protective, anti-inflammatory, and anti-atherogenic properties. We hypothesized that increased levels...

  12. Effects of DGAT1 deficiency on energy and glucose metabolism are independent of adiponectin

    Streeper, Ryan S.; Koliwad, Suneil K.; Villanueva, Claudio J.; Farese, Robert V

    2006-01-01

    Mice lacking acyl-CoA:diacylglycerol acyltransferase 1 (DGAT1), an enzyme that catalyzes the terminal step in triacylglycerol synthesis, have enhanced insulin sensitivity and are protected from obesity, a result of increased energy expenditure. In these mice, factors derived from white adipose tissue (WAT) contribute to the systemic changes in metabolism. One such factor, adiponectin, increases fatty acid oxidation and enhances insulin sensitivity. To test the hypothesis that adiponectin is r...

  13. The Role of Adiponectin in Cancer: A Review of Current Evidence

    Dalamaga, Maria; Diakopoulos, Kalliope N.; Mantzoros, Christos S.

    2012-01-01

    Excess body weight is associated not only with an increased risk of type 2 diabetes and cardiovascular disease (CVD) but also with various types of malignancies. Adiponectin, the most abundant protein secreted by adipose tissue, exhibits insulin-sensitizing, antiinflammatory, antiatherogenic, proapoptotic, and antiproliferative properties. Circulating adiponectin levels, which are determined predominantly by genetic factors, diet, physical activity, and abdominal adiposity, are decreased in p...

  14. Adiponectin, diabetes and ischemic heart failure: a challenging relationship

    Baldasseroni Samuele

    2012-12-01

    Full Text Available Abstract Background Several peptides, named adipokines, are produced by the adipose tissue. Among those, adiponectin (AD is the most abundant. AD promotes peripheral insulin sensitivity, inhibits liver gluconeogenesis and displays anti-atherogenic and anti-inflammatory properties. Lower levels of AD are related to a higher risk of myocardial infarction and a worse prognosis in patients with coronary artery disease. However, despite a favorable clinical profile, AD increases in relation to worsening heart failure (HF; in this context, higher adiponectinemia is reliably related to poor prognosis. There is still little knowledge about how certain metabolic conditions, such as diabetes mellitus, modulate the relationship between AD and HF. We evaluated the level of adiponectin in patients with ischemic HF, with and without type 2 diabetes, to elucidate whether the metabolic syndrome was able to influence the relationship between AD and HF. Results We demonstrated that AD rises in patients with advanced HF, but to a lesser extent in diabetics than in non-diabetics. Diabetic patients with reduced systolic performance orchestrated a slower rise of AD which began only in face of overt HF. The different behavior of AD in the presence of diabetes was not entirely explained by differences in body mass index. In addition, NT-proBNP, the second strongest predictor of AD, did not differ significantly between diabetic and non-diabetic patients. These data indicate that some other mechanisms are involved in the regulation of AD in patients with type 2 diabetes and coronary artery disease. Conclusions AD rises across chronic heart failure stages but this phenomenon is less evident in type 2 diabetic patients. In the presence of diabetes, the progressive increase of AD in relation to the severity of LV dysfunction is hampered and becomes evident only in overt HF.

  15. Adiponectin Enhances Cold-Induced Browning of Subcutaneous Adipose Tissue via Promoting M2 Macrophage Proliferation.

    Hui, Xiaoyan; Gu, Ping; Zhang, Jialiang; Nie, Tao; Pan, Yong; Wu, Donghai; Feng, Tianshi; Zhong, Cheng; Wang, Yu; Lam, Karen S L; Xu, Aimin

    2015-08-01

    Adiponectin is an abundant adipokine with pleiotropic protective effects against a cluster of obesity-related cardiometabolic disorders. However, its role in adaptive thermogenesis has scarcely been explored. Here we showed that chronic cold exposure led to a markedly elevated production of adiponectin in adipocytes of subcutaneous white adipose tissue (scWAT), which in turn bound to M2 macrophages in the stromal vascular fraction. Chronic cold exposure-induced accumulation of M2 macrophages, activation of beige cells, and thermogenic program were markedly impaired in scWAT of adiponectin knockout (ADN KO) mice, whereas these impairments were reversed by replenishment with adiponectin. Mechanistically, adiponectin was recruited to the cell surface of M2 macrophages via its binding partner T-cadherin and promoted the cell proliferation by activation of Akt, consequently leading to beige cell activation. These findings uncover adiponectin as a key efferent signal for cold-induced adaptive thermogenesis by mediating the crosstalk between adipocytes and M2 macrophages in scWAT. PMID:26166748

  16. Xylitol does not directly affect adiponectin productionand adipogenesis in 3T3-L1 cells

    Pilaiwan Siripurkpong

    2014-08-01

    Full Text Available Xylitol is widely used as a low-calorie sweetener in various kinds of food products, including diabetic foods. Adiponectin, secreted by adipocytes, plays a key role in carbohydrate and lipid metabolism. Low levels of plasma adiponectin are associated with cardiovascular disease and type II diabetes. The aims of this study were to determine effects of xylitol on the adipogenesis of pre-adipocytes, adiponectin synthesis and secretion. To assess adipogenesis, pre-adipocyte 3T3-L1 cells were treated with xylitol during cell differentiation and fat droplets in the mature adipocytes were stained with oil red O. Adiponectin levels were determined by Western blot in both culture media and mature adipocytes treated with xylitol. There were no significant differences in the levels of adipogenesis, adiponectin synthesis and secretion in the xylitol-treated 3T3-L1 cells compared with the untreated control cells. This suggests that xylitol does not have a direct effect on adipogenesis or on adiponectin synthesis and secretion.

  17. Biochemical Evaluation of Serum Adiponectin Level in Egyptian Breast Cancer Patients before and after Treatment

    In this study, serum adiponectin level was evaluated in 35 primary breast cancer patients and 10 healthy females, before and after treatment to assess if there is a relation between it and breast cancer, and to find out if it has a prognostic value. Serum adiponectin level was significantly lower in all and postmenopausal breast cancer patients before taking any type of treatment, and non-significantly lower in locally advanced breast cancer patients after treatment by 4 cycles of neoadjuvant chemotherapy than healthy controls. Non-significant elevations was shown after treatment by surgery, and also after completing treatment by surgery followed by taking 2 cycles of adjuvant chemotherapy followed by treatment by radiotherapy in case of premenopausal locally advanced breast cancer patients. Triglycerides showed significantly higher level in all groups of patients. There was statistical negative correlation between serum adiponectin level and body mass index (BMI) in postmenopausal healthy controls, and between serum adiponectin level and BMI, triglycerides in all and postmenopausal breast cancer patients before taking any type of treatment. In conclusion, this study suggests that low serum adiponectin level is likely to be associated with increased breast cancer risk, particularly among postmenopausal women. The association between obesity and breast cancer risk might be partly explained by adiponectin

  18. The Effects of Aerobic Exercise on the Levels of Leptin and Adiponectin in Overweight Women

    Seyyed Reza Attarzadeh Hosseini

    2015-05-01

    Full Text Available Background & Objectives: Several epidemiological studies have indicated factors such as Leptin level, Adiponectin and plasma adiponectin-to-leptin index to be the predicting biomarkers for cardiovascular diseases. Given the importance of healthy nutrition and adequate exercise in reducing the risk of Atherosclerosis, this study aimed to investigate the effects of fasting and aerobic exercise on the level of leptin and adiponectin in overweight women.   Materials and Methods: In this study, 27 overweight and obese women with the body mass index (BMI of ≥25 kg/m2 and the age range of 45-20 years were selected by targeted sampling and were divided into two groups of fasting accompanied with aerobic exercise (N=15, and fasting only (N=12. The active group had an exercise protocol including three 60-minute sessions of aerobic exercise per week, with the maximum heart rate of 50-65%. Anthropometric dimensions and blood levels of leptin and adiponectin were measured in all the subjects before, at the second week and the fourth week and one week after Ramadan. Data analysis was carried out using repeated measures, and a P value of ≤0.05 was considered significant.   Results: In this study, one month of fasting accompanied with aerobic exercise had a significant effect on the amount of leptin, adiponectin and leptin-to-adiponectin ratio (P

  19. Cardiometabolic Risk Factors Related to Vitamin D and Adiponectin in Obese Children and Adolescents

    Fatih Kardas

    2013-01-01

    Full Text Available Obesity-related diseases are becoming the most important causes of mortality worldwide. Several studies have suggested an association between low levels of vitamin D and obesity. In addition, plasma adiponectin levels have been found to be lower in obese subjects. We evaluated the association of metabolic risk factors with both adiponectin and vitamin D levels and that between adiponectin and vitamin D levels. The study consisted of 114 obese and healthy subjects. 25-Hydroxy vitamin D [25(OHD] levels were positively correlated with adiponectin and HDL-cholesterol (HDL-C and inversely correlated with body mass index (BMI, LDL-cholesterol (LDL-C, total cholesterol (T-C, triglyceride (TG, fasting glucose, homeostasis model assessment of insulin resistance (HOMA index, systolic blood pressure (SBP, and diastolic blood pressure (DBP. The mean 25(OHD levels in the obese and nonobese groups were and  ng/mL, respectively (. The mean adiponectin level in the obese group was lower than that in the nonobese group (. Lower vitamin D and adiponectin levels were strongly associated with metabolic risk factors and obesity in Turkish children and adolescents.

  20. Serum adiponectin and transient elastography as non-invasive markers for postoperative biliary atresia

    Udomsinprasert Wanvisa

    2011-02-01

    Full Text Available Abstract Background Biliary atresia (BA is a progressive inflammatory disorder of the extrahepatic bile ducts leading to the obliteration of bile flow. The purpose of this study was to determine serum adiponectin in BA patients and to investigate the relationship of adiponectin with clinical parameters and liver stiffness scores. Methods Sixty BA patients post Kasai operation and 20 controls were enrolled. The mean age of BA patients and controls was 9.6 ± 0.7 and 10.1 ± 0.7 years, respectively. BA patients were classified into two groups according to their serum total bilirubin (TB levels (non-jaundice, TB Results BA patients had markedly higher serum adiponectin levels (15.5 ± 1.1 vs. 11.1 ± 1.1 μg/ml, P = 0.03 and liver stiffness than controls (30.1 ± 3.0 vs. 5.1 ± 0.5 kPa, P P P r = 0.58, r = 0.46, and r = 0.60, P Conclusions Serum adiponectin and liver stiffness values were higher in BA patients compared with normal participants. The elevated serum adiponectin levels also positively correlated with the degree of hepatic dysfunction and liver fibrosis. Accordingly, serum adiponectin and transient elastography could serve as the useful non-invasive biomarkers for monitoring the severity and progression in postoperative BA.

  1. Is adiponectin level a predictor of nonalcoholic fatty liver disease in nondiabetic male patients?

    Haluk Sargin; Mehmet Sargin; Hülya Gozu; Asuman Orcun; Gülcan Baloglu; Murat Ozisik; Mesut Seker; Oya Uygur-Bayramicli

    2005-01-01

    AIM: To study the levels of adiponectin in nondiabetic patients with nonalcoholic fatty liver disease (NAFLD) in comparison with control group.METHODS: Thirty-five patients who had elevated serum aminotransferase levels with bright liver and 34 healthy volunteers without liver disease were evaluated. Age,gender and body mass index (BMI) were recorded. Fasting plasma glucose, insulin, adiponectin, proinsulin and lipid profile were measured. A standard oral glucose tolerance test (OGTT) with insulin response was performed and the index of insulin resistance was calculated according to the homeostasis model assessment (HOMA) method.RESULTS: According to the OGTT results, none of the participants had diabetes. Serum adiponectin levels were statistically significantly lower in patients with NAFLD than in control group (8.14±3.4 μg/mL vs12.4±9.4 μg/mL,respectively, P<0.01). A statistically significant correlation was found between adiponectin and BMI (r: -0.33, P<0.01),HOMA (r: -0.26, P<0.05), proinsulin (r: -0.32, P<0.01),AST (r: -0.25, P<0.05), ALT (r: -0.26, P<0.05) or GGT (r: -0.22, P<0.05). In multiple regression analysis models,adiponectin levels were the only predictor of NAFLD in males, whereas in female group it was the BMI.CONCLUSION: Low adiponectin level might be a predictor of NAFLD especially in male nondiabetics.

  2. Serum adiponectin level in patients with obstructive sleep apnea hypopnea syndrome

    张希龙; 殷凯生; 毛辉; 王虹; 杨玉

    2004-01-01

    Background Adiponectin, secreted by adipocytes, has been found to be associated with diabetes, obesity and some cardiovascular diseases. Obstructive sleep apnea hypopnea syndrome (OSAHS) is also closely related to obesity and easily complicated with diabetes and some cardiovascular diseases. This study was carried out to explore the change of serum adiponectin level in patients with OSAHS.Methods Polysomnography was performed in 71 patients with OSAHS (OSAHS group) and 26 simple obese controls (control group). The two groups had no significant difference in age and body mass index (BMI). Radioimmunoassy was used to test serum adiponectin level.Results Serum adiponectin level was significantly lower in OSAHS group [(5.03±1.01) mg/L] than that in the control group [(7.09±1.29) mg/L, P<0.05]. The differences between two groups were independent of gender. In OSAHS groups, serum adiponectin levels were negatively correlated with apnea hypopnea index (AHI) (r=-0.78, P<0.01), BMI (r=-0.13, P<0.05), waist circumsference (r=-0.36, P<0.01), and neck circumference (r=-0.42, P<0.01), but positively correlated with the minimal pulse oxyhemoglobin saturation (r=0.48, P<0.01). Conclusion OSAHS may contribute to the decrease of serum adiponectin level independent of obesity.

  3. Adiponectin deficiency exacerbates lipopolysaccharide/ D-galactosamine-induced liver injury in mice

    Hitoshi Matsumoto; Yuji Matsuzawa; Iichiro Shimomura; Norio Hayashi; Shinji Tamura; Yoshihiro Kamada; Shinichi Kiso; Juichi Fukushima; Akira Wada; Norikazu Maeda; Shinji Kihara; Tohru Funahashi

    2006-01-01

    AIM: To examine the effects of adiponectin on the functions of Kupffer cells, key modulators of lipopolysaccharide (LPS) -induced liver injury.METHODS: D-galactosamine (GaIN) and LPS were injected intraperitoneally into adiponectin-/- mice and wild type mice. Kupffer cells, isolated from Sprague-Dawley rats, were preincubated with or without adiponectin, and then treated with LPS.RESULTS: In knockout mice, GalN/LPS injection significantly lowered the survival rate, significantly raised the plasma levels of alanine transaminase and tumor necrosis factor-α (TNF-α) and significantly reduced IL-10 levels compared with wild type mice. TNF-α gene expression in the liver was which higher and those of IL-10 were lower in knockout mice than in wild type mice. In cultured adiponectin-pre-treated Kupffer cells, LPS significantly lowered TNF-α levels and raised IL-10 levels in the culture media and their respective gene expression levels, compared with Kupffer cells without adiponectinpre-treatment.CONCLUSION: Adiponectin supresses TNF-α production and induces IL-10 production by Kupffer cells in response to LPS stimulation, and a lack of adiponectin enhances LPS-induced liver injury.

  4. Reduced plasma adiponectin levels relative to oxidized low density lipoprotein and nitric oxide in coronary artery disease patients

    Gholam Basati; Morteza Pourfarzam; Ahmad Movahedian; Saed Ziaaldin Samsamshariat; Nizal Sarrafzadegan

    2011-01-01

    INTRODUCTION: Adiponectin is a circulating hormone that is produced exclusively by adipocytes and has antiinflammatory and anti-atherogenic properties. The hypothesis that there are differences in adiponectin levels between stable and unstable coronary-artery disease patients remains controversial. Furthermore, the potential relationships between the plasma adiponectin level and the inflammatory and non-inflammatory markers (oxidized low density lipoprotein and nitric oxide) in patients with ...

  5. Association of Atherosclerotic Peripheral Arterial Disease with Adiponectin Genes SNP+45 and SNP+276: A Case-Control Study

    Sorana D. Bolboacă; Doru Pamfil; Gherman, Claudia D.

    2013-01-01

    Objectives. We hypothesized that adiponectin gene SNP+45 (rs2241766) and SNP+276 (rs1501299) would be associated with atherosclerotic peripheral arterial disease (PAD). Furthermore, the association between circulating adiponectin levels, fetuin-A, and tumoral necrosis factor-alpha (TNF-α) in patients with atherosclerotic peripheral arterial disease was investigated. Method. Several blood parameters (such as adiponectin, fetuin-A, and TNF-α) were measured in 346 patients, 226 with atherosclero...

  6. Gene–environment interaction between adiponectin gene polymorphisms and environmental factors on the risk of diabetic retinopathy

    Li, Yuan; Wu, Qun Hong; Jiao, Ming Li; Fan, Xiao Hong; Hu, Quan; Hao, Yan Hua; Liu, Ruo Hong; Zhang, Wei; Cui, Yu; Han, Li Yuan

    2014-01-01

    Aims/Introduction To evaluate whether the adiponectin gene is associated with diabetic retinopathy (DR) risk and interaction with environmental factors modifies the DR risk, and to investigate the relationship between serum adiponectin levels and DR. Materials and Methods Four adiponectin polymorphisms were evaluated in 372 DR cases and 145 controls. Differences in environmental factors between cases and controls were evaluated by unconditional logistic regression analysis. The model-free mul...

  7. Adiponectin gene SNP 276G → T, nutrient intakes, and cardiovascular disease risk in Korean type 2 DM patients

    Yu, So Young; Ryu, Han Kyoung; Park, Hee Jung; Choi, Young Ju; Huh, Kap Bum; Kim, Wha Young

    2007-01-01

    Single nucleotide polymorphism (SNP) in adiponectin gene has been associated with insulin resistance, diabetes, and cardiovascular disease (CVD). This study was performed to investigate the association of SNP 276G→T at adiponectin gene with CVD risk factors in Korean type 2 diabetes mellitus (DM) patients. The subjects were 351 type 2 DM patients visited a DM clinic in Seoul, and the patients with known CVD were excluded. The adiponectin SNP 276G→T was analyzed and dietary intakes were assess...

  8. Short communication: Circulating and milk adiponectin change differently during energy deficiency at different stages of lactation in dairy cows

    Singh, S.P.; Häussler, S.; Gross, Josef Johann; Schwarz, F.J.; Bruckmaier, Rupert; Sauerwein, H.

    2014-01-01

    Adiponectin, one of the most abundant adipokines in circulation, is known for its role in regulation of body metabolism. The aim of this study was to evaluate the effects of a negative energy balance (NEB) at 2 stages of lactation (lactational NEB at the onset of lactation and an induced NEB by feed restriction near 100 d of lactation) on circulating adiponectin concentrations. We also investigated the effect of feed restriction on adiponectin concentrations in milk and the relationships of b...

  9. Adiponectin protects against myocardial ischemia-reperfusion injury through AMPK- and COX-2—dependent mechanisms

    Shibata, Rei; Sato, Kaori; Pimentel, David R.; Takemura, Yukihiro; Kihara, Shinji; Ohashi, Koji; Funahashi, Tohru; Ouchi, Noriyuki; Walsh, Kenneth

    2005-01-01

    Obesity-related disorders are associated with the development of ischemic heart disease. Adiponectin is a circulating adipose-derived cytokine that is downregulated in obese individuals and after myocardial infarction. Here, we examine the role of adiponectin in myocardial remodeling in response to acute injury. Ischemia-reperfusion in adiponectin-deficient (APN-KO) mice resulted in increased myocardial infarct size, myocardial apoptosis and tumor necrosis factor (TNF)-α expression compared w...

  10. Genetic determination of adiponectin and its relationship with body fat topography in multigenerational families of African heritage

    Miljkovic-Gacic, Iva; Wang, Xiaojing; Kammerer, Candace M.; Bunker, ClareAnn H; Wheeler, Victor W.; Patrick, Alan L.; Kuller, Lewis H.; Evans, Rhobert W.; Zmuda, Joseph M

    2007-01-01

    Adiponectin, an adipose-specific protein, is negatively associated with adiposity, insulin sensitivity, and diabetes. Very few studies have examined the role of heredity in the regulation of adiponectin and its association with body fat among individuals of African heritage. Thus, we measured fasting serum adiponectin levels by radioimmunoassay and body composition by dual-energy x-ray absorptiometry (DEXA) in 402 individuals aged 18 to 103 years belonging to 7 multigenerational families of A...

  11. Elevated Adiponectin Antibody Levels in Sera of Patients with Atherosclerosis- related Coronary Artery Disease, Cerebral Infarction and Diabetes Mellitus

    Hiwasa, Takaki; Zhang, Xiao-Meng; Kimura, Risa; Ohno, Mikiko; Chen, Po-Min; Nishi, Eiichiro; Ono, Koh; Kimura, Takeshi; Kamitsukasa, Ikuo; Wada, Takeshi; Aotsuka, Akiyo; Mine, Seiichiro; Takizawa, Hirotaka; Kashiwado, Koichi; Takemoto, Minoru

    2016-01-01

    Adiponectin secreted from the adipocytes plays pleiotrop‐ ic, anti-atherosclerotic roles, such as enhancement of insulin secretion and an increase in energy expenditure. The measurement of levels of circulating adiponectin is useful to evaluate the progression of atherosclerosis- related diseases, such as coronary artery disease (CAD), cerebral infarction (CI) and diabetes mellitus (DM). We examined the serum antibody levels against recombinant adiponectin protein via the amplified luminescen...

  12. ADIPONECTIN AND C-REACTIVE PROTEIN RELATIONSHIP IN PLASMA AND ADIPOSE TISSUE (STUDY AMONG HEALTHY OBESE EGYPTIAN FEMALES)

    The adipokine, adiponectin inhibits vascular inflammation and acts as an endogenous modulator of obesity - linked diseases. High - sensitive C-reactive protein (hs-CRP) is recently debated as a risk factor and mediator for atherosclerosis. The present study investigated the association between adiponectin and hs-CRP in plasma and adipose tissue, and their relation to body composition and insulin sensitivity in a cohort of normal (30 subjects), obese (30 subjects) and morbidly - obese females (10 subjects). Messenger RNA (mRNA) expression of CRP and adiponectin in human adipose tissue were measured using real-time polymerase chain reaction. Plasma adiponectin and insulin were measured using radioimmunoassay methods, while, plasma hs-CRP was measured using ultrasensitive latex method.Results showed that adiponectin was negatively correlated with weight, BMI and insulin sensitivity index, and positively correlated with HDLc. The plasma hs-CRP levels were negatively correlated with plasma adiponectin. The plasma adiponectin levels being significantly lower and plasma hs-CRP being significantly higher in obese than normal females. Real- Time PCR analysis revealed the expression of CRP m-RNA in human adipose tissue and this was inversely correlated to adiponectin m RNA. These results suggest that elevation of CRP and reduction of adiponectin could emerge as mediators of atherogenesis and insulin resistance

  13. Association of adiponectin with cardiovascular events in diabetic and non-diabetic hemodialysis patients

    Amir Elokely

    2012-01-01

    Full Text Available Adiponectin is a novel collagen-like protein synthesized by white adipose tissue. Its levels are decreased in obesity, type-2 diabetes and insulin-resistant states, and are increased in chronic renal failure. It has anti-inflammatory and anti-atherogenic properties. This study was planned to evaluate the levels of adiponectin in uremic patients with and without diabetes and to find any relationship between adiponectin levels and some cardiovascular risk factors, and to determine the possible predictive value of adiponectin for cardiovascular complications (CVC. The study included 100 subjects, 20 of them were healthy subjects and served as the control group (group I, 40 were uremic non-diabetic patients (group II (half of them were without CVC, group IIA, and the other half were patients with CVC, group IIB and, lastly, 40 uremic diabetic patients (group III (half of them were without CVC, group IIIA, and the other half were patients with CVC, group IIIB. All subjects were subjected to complete clinical examination, including determination of mean arterial blood pressure (MABP, body mass index (BMI, waist to hip ratio, routine laboratory investigations, fasting plasma glucose, fasting plasma insulin, lipid profile (cholesterol, TG, LDL, HDL, determination of insulin resistance by homeostasis model assessment index (HOMA-IR and estimation of serum levels of adiponectin. There was a significant increase in serum adiponectin levels in all the uremic patients (group II and group III when compared with the control (group I group, P <0.01; also, serum adiponectin levels were significantly decreased in uremic diabetic patients (group III when compared with uremic non-diabetic patients (group II, P <0.01; but this was still higher than in the controls. The patients with CVC, whether uremic non-diabetic (group IIB or uremic diabetic (group IIIB, had a significant decrease in serum adiponectin levels when compared with patients without CVC (group IIA and

  14. Effects of Adiponectin Including Reduction of Androstenedione Secretion and Ovarian Oxidative Stress Parameters In Vivo

    Comim, Fabio V.; Gutierrez, Karina; Bridi, Alessandra; Bochi, Guilherme; Chemeris, Raisa; Rigo, Melânia L.; Dau, Andressa Minussi P.; Cezar, Alfredo S.; Moresco, Rafael Noal; Gonçalves, Paulo Bayard Dias

    2016-01-01

    Adiponectin is the most abundantly produced human adipokine with anti-inflammatory, anti-oxidative, and insulin-sensitizing properties. Evidence from in vitro studies has indicated that adiponectin has a potential role in reproduction because it reduces the production of androstenedione in bovine theca cells in vitro. However, this effect on androgen production has not yet been observed in vivo. The current study evaluated the effect of adiponectin on androstenedione secretion and oxidative stress parameters in a rodent model. Seven-week-old female Balb/c mice (n = 33), previously treated with equine gonadotropin chorionic, were assigned to one of four different treatments: Group 1, control (phosphate-buffered saline); Group 2, adiponectin 0.1 μg/mL; Group 3, adiponectin 1.0 μg/mL; Group 4, adiponectin 5.0 μg/mL. After 24 h, all animals were euthanized and androstenedione levels were measured in the serum while oxidative stress markers were quantified in whole ovary tissue. Female mice treated with adiponectin exhibited a significant reduction (about 60%) in serum androstenedione levels in comparison to controls. Androstenedione levels decreased from 0.78 ± 0.4 ng/mL (mean ± SD) in controls to 0.28 ± 0.06 ng/mL after adiponectin (5 μg/mL) treatment (P = 0.01). This change in androgen secretion after 24 hours of treatment was associated with a significant reduction in the expression of CYP11A1 and STAR (but not CYP17A1). In addition, ovarian AOPP product levels, a direct product of protein oxidation, decreased significantly in adiponectin-treated mice (5 μg/mL); AOPP (mean ± SD) decreased to 4.3 ± 2.1 μmol/L in comparison with that of the controls (11.5 ± 1.7 μmol/L; P = 0.0003). Our results demonstrated for the first time that acute treatment with adiponectin reduced the levels of a direct oxidative stress marker in the ovary as well as decreased androstenedione serum levels in vivo after 24 h. PMID:27158926

  15. Glucose and Inflammatory Cells Decrease Adiponectin in Epicardial Adipose Tissue Cells: Paracrine Consequences on Vascular Endothelium.

    Fernández-Trasancos, Ángel; Guerola-Segura, Raquel; Paradela-Dobarro, Beatriz; Álvarez, Ezequiel; García-Acuña, José María; Fernández, Ángel Luis; González-Juanatey, José Ramón; Eiras, Sonia

    2016-05-01

    Epicardial adipose tissue (EAT) is a source of energy for heart that expresses the insulin-sensitizer, anti-inflammatory and anti-atherogenic protein, adiponectin. But, in coronary artery disease, adiponectin production declines. Our objective was to determine its regulation by glucose and inflammation in stromal cells from EAT and subcutaneous adipose tissue (SAT) and its paracrine effect on endothelial cells. Stromal cells of EAT and SAT were obtained from patients who underwent cardiac surgery. Adipogenesis was induced at 117, 200, or 295 mg/dl glucose, with or without macrophage-conditioned medium (MCM). Expression of adiponectin, GLUT-4 and the insulin receptor was analyzed by real-time PCR. The paracrine effect of stromal cells was determined in co-cultures with endothelial cells, by exposing them to high glucose and/or MCM, and, additionally, to leukocyte-conditioned medium from patients with myocardial infarction. The endothelial response was determined by analyzing vascular adhesion molecule expression. Our results showed a U-shaped dose-response curve of glucose on adiponectin in EAT, but not in SAT stromal cells. Conversely, MCM reduced the adipogenesis-induced adiponectin expression of EAT stromal cells. The presence of EAT stromal increased the inflammatory molecules of endothelial cells. This deleterious effect was emphasized in the presence of inflammatory cell-conditioned medium from patients with myocardial infarction. Thus, high glucose and inflammatory cells reduced adipogenesis-induced adiponectin expression of EAT stromal cells, which induced an inflammatory paracrine process in endothelial cells. This inflammatory effect was lower in presence of mature adipocytes, producers of adiponectin. These results contribute to understanding the role of EAT dysfunction on coronary atherosclerosis progression. PMID:26406271

  16. A genome-wide association study reveals variants in ARL15 that influence adiponectin levels.

    J Brent Richards

    2009-12-01

    Full Text Available The adipocyte-derived protein adiponectin is highly heritable and inversely associated with risk of type 2 diabetes mellitus (T2D and coronary heart disease (CHD. We meta-analyzed 3 genome-wide association studies for circulating adiponectin levels (n = 8,531 and sought validation of the lead single nucleotide polymorphisms (SNPs in 5 additional cohorts (n = 6,202. Five SNPs were genome-wide significant in their relationship with adiponectin (P< or =5x10(-8. We then tested whether these 5 SNPs were associated with risk of T2D and CHD using a Bonferroni-corrected threshold of P< or =0.011 to declare statistical significance for these disease associations. SNPs at the adiponectin-encoding ADIPOQ locus demonstrated the strongest associations with adiponectin levels (P-combined = 9.2x10(-19 for lead SNP, rs266717, n = 14,733. A novel variant in the ARL15 (ADP-ribosylation factor-like 15 gene was associated with lower circulating levels of adiponectin (rs4311394-G, P-combined = 2.9x10(-8, n = 14,733. This same risk allele at ARL15 was also associated with a higher risk of CHD (odds ratio [OR] = 1.12, P = 8.5x10(-6, n = 22,421 more nominally, an increased risk of T2D (OR = 1.11, P = 3.2x10(-3, n = 10,128, and several metabolic traits. Expression studies in humans indicated that ARL15 is well-expressed in skeletal muscle. These findings identify a novel protein, ARL15, which influences circulating adiponectin levels and may impact upon CHD risk.

  17. Adiponectin-coated nanoparticles for enhanced imaging of atherosclerotic plaques

    Almer G

    2011-06-01

    Full Text Available Gunter Almer1,6, Karin Wernig2, Matthias Saba-Lepek3, Samih Haj-Yahya1, Johannes Rattenberger4, Julian Wagner4, Kerstin Gradauer3, Daniela Frascione3, Georg Pabst3, Gerd Leitinger5, Harald Mangge1, Andreas Zimmer2, Ruth Prassl31Clinical Institute of Medical and Chemical Laboratory Diagnostics, 2Institute of Pharmaceutical Sciences, Department of Pharmaceutical Technology, University of Graz, 3Institute of Biophysics and Nanosystems Research, Austrian Academy of Science, 4Institute for Electron Microscopy and Fine Structure Research, Graz University of Technology, 5Institute of Cell Biology, Histology and Embryology, Medical University of Graz, 6Center for Medical Research, Medical University of Graz, AustriaBackground: Atherosclerosis is a leading cause of mortality in the Western world, and plaque diagnosis is still a challenge in cardiovascular medicine. The main focus of this study was to make atherosclerotic plaques visible using targeted nanoparticles for improved imaging. Today various biomarkers are known to be involved in the pathophysiologic scenario of atherosclerotic plaques. One promising new candidate is the globular domain of the adipocytokine adiponectin (gAd, which was used as a targeting sequence in this study.Methods: gAd was coupled to two different types of nanoparticles, namely protamine-oligonucleotide nanoparticles, known as proticles, and sterically stabilized liposomes. Both gAd-targeted nanoparticles were investigated for their potency to characterize critical scenarios within early and advanced atherosclerotic plaque lesions using an atherosclerotic mouse model. Aortic tissue from wild type and apolipoprotein E-deficient mice, both fed a high-fat diet, were stained with either fluorescent-labeled gAd or gAd-coupled nanoparticles. Ex vivo imaging was performed using confocal laser scanning microscopy.Results: gAd-targeted sterically stabilized liposomes generated a strong signal by accumulating at the surface of

  18. Adiponectin haploinsufficiency promotes mammary tumor development in MMTV-PyVT mice by modulation of phosphatase and tensin homolog activities.

    Janice B B Lam

    Full Text Available BACKGROUND: Adiponectin is an adipokine possessing beneficial effects on obesity-related medical complications. A negative association of adiponectin levels with breast cancer development has been demonstrated. However, the precise role of adiponectin deficiency in mammary carcinogenesis remains elusive. METHODOLOGY/PRINCIPAL FINDINGS: In the present study, MMTV-polyomavirus middle T antigen (MMTV-PyVT transgenic mice with reduced adiponectin expressions were established and the stromal effects of adiponectin haploinsufficiency on mammary tumor development evaluated. In mice from both FVB/N and C57BL/6J backgrounds, insufficient adiponectin production promoted mammary tumor onset and development. A distinctive basal-like subtype of tumors, with a more aggressive phenotype, was derived from adiponectin haplodeficient MMTV-PyVT mice. Comparing with those from control MMTV-PyVT mice, the isolated mammary tumor cells showed enhanced tumor progression in re-implanted nude mice, accelerated proliferation in primary cultures, and hyperactivated phosphatidylinositol-3-kinase (PI3K/Akt/beta-catenin signaling, which at least partly attributed to the decreased phosphatase and tensin homolog (PTEN activities. Further analysis revealed that PTEN was inactivated by a redox-regulated mechanism. Increased association of PTEN-thioredoxin complexes was detected in tumors derived from mice with reduced adiponectin levels. The activities of thioredoxin (Trx1 and thioredoxin reductase (TrxR1 were significantly elevated, whereas treatment with either curcumin, an irreversible inhibitor of TrxR1, or adiponectin largely attenuated their activities and resulted in the re-activation of PTEN in these tumor cells. Moreover, adiponectin could inhibit TrxR1 promoter-mediated transcription and restore the mRNA expressions of TrxR1. CONCLUSION: Adiponectin haploinsufficiency facilitated mammary tumorigenesis by down-regulation of PTEN activity and activation of PI3K

  19. The prevention and treatment of hypoadiponectinemia-associated human diseases by up-regulation of plasma adiponectin.

    Hossain, Md Murad; Mukheem, Abdul; Kamarul, Tunku

    2015-08-15

    Hypoadiponectinemia is characterized by low plasma adiponectin levels that can be caused by genetic factors, such as single nucleotide polymorphisms (SNPs) and mutations in the adiponectin gene or by visceral fat deposition/obesity. Reports have suggested that hypoadiponectinemia is associated with dyslipidemia, hypertension, hyperuricemia, metabolic syndrome, atherosclerosis, type 2 diabetes mellitus and various cardiovascular diseases. Previous studies have highlighted several potential strategies to up-regulate adiponectin secretion and function, including visceral fat reduction through diet therapy and exercise, administration of exogenous adiponectin, treatment with peroxisome proliferator-activating receptor gamma (PPARγ) agonists (e.g., thiazolidinediones (TZDs)) and ligands (e.g., bezafibrate and fenofibrate) or the blocking of the renin-angiotensin system. Likewise, the up-regulation of the expression and stimulation of adiponectin receptors by using adiponectin receptor agonists would be an effective method to treat obesity-related conditions. Notably, adiponectin is an abundantly expressed bioactive protein that also exhibits a wide spectrum of biological properties, such as insulin-sensitizing, anti-diabetic, anti-inflammatory and anti-atherosclerotic activities. Although targeting adiponectin and its receptors has been useful for treating diabetes and other metabolic-related diseases in experimental studies, current drug development based on adiponectin/adiponectin receptors for clinical applications is scarce, and there is a lack of available clinical trial data. This comprehensive review discusses the strategies that are presently being pursued to harness the potential of adiponectin up-regulation. In addition, we examined the current status of drug development and its potential for clinical applications. PMID:25818192

  20. Ratiometric measurements of adiponectin by mass spectrometry in bottlenose dolphins (Tursiops truncatus with iron overload reveal an association with insulin resistance and glucagon

    Benjamin A Neely

    2013-09-01

    Full Text Available High molecular weight (HMW adiponectin levels are reduced in humans with type 2 diabetes and insulin resistance. Similar to humans with insulin resistance, managed bottlenose dolphins (Tursiops truncatus diagnosed with hemochromatosis (iron overload have higher levels of 2 h post-prandial plasma insulin than healthy controls. A parallel reaction monitoring assay for dolphin serum adiponectin was developed based on tryptic peptides identified by mass spectrometry. Using identified post-translational modifications, a differential measurement was constructed. Total and unmodified adiponectin levels were measured in sera from dolphins with (n=4 and without (n=5 iron overload. This measurement yielded total adiponectin levels as well as site specific percent unmodified adiponectin that may inversely correlate with HMW adiponectin. Differences in insulin levels between iron overload cases and controls were observed 2 h post-prandial, but not during the fasting state. Thus, post-prandial as well as fasting serum adiponectin levels were measured to determine whether adiponectin and insulin would follow similar patterns. There was no difference in total adiponectin or percent unmodified adiponectin from case or control fasting animals. There was no difference in post-prandial total adiponectin levels between case and control dolphins (mean ± S.D. at 763 ± 298 and 727 ± 291 pmol/ml, respectively (p = 0.91; however, percent unmodified adiponectin was significantly higher in post-prandial cases compared controls (30.0 ± 6.3 versus 17.0 ± 6.6%, respectively; p = 0.016. Interestingly, both total and percent unmodified adiponectin were correlated with glucagon levels in controls (r = 0.999, p < 0.001, but not in cases, which is possibly a reflection of insulin resistance. Although total adiponectin levels were not significantly different, the elevated percent unmodified adiponectin follows a trend similar to HMW adiponectin reported for humans with

  1. Adiponectin induces A20 expression in adipose tissue to confer metabolic benefit.

    Hand, Laura E; Usan, Paola; Cooper, Garth J S; Xu, Lance Y; Ammori, Basil; Cunningham, Peter S; Aghamohammadzadeh, Reza; Soran, Handrean; Greenstein, Adam; Loudon, Andrew S I; Bechtold, David A; Ray, David W

    2015-01-01

    Obesity is a major risk factor for metabolic disease, with white adipose tissue (WAT) inflammation emerging as a key underlying pathology. We detail that mice lacking Reverbα exhibit enhanced fat storage without the predicted increased WAT inflammation or loss of insulin sensitivity. In contrast to most animal models of obesity and obese human patients, Reverbα(-/-) mice exhibit elevated serum adiponectin levels and increased adiponectin secretion from WAT explants in vitro, highlighting a potential anti-inflammatory role of this adipokine in hypertrophic WAT. Indeed, adiponectin was found to suppress primary macrophage responses to lipopolysaccharide and proinflammatory fatty acids, and this suppression depended on glycogen synthase kinase 3β activation and induction of A20. Attenuated inflammatory responses in Reverbα(-/-) WAT depots were associated with tonic elevation of A20 protein and ex vivo shown to depend on A20. We also demonstrate that adipose A20 expression in obese human subjects exhibits a negative correlation with measures of insulin sensitivity. Furthermore, bariatric surgery-induced weight loss was accompanied by enhanced WAT A20 expression, which is positively correlated with increased serum adiponectin and improved metabolic and inflammatory markers, including C-reactive protein. The findings identify A20 as a mediator of adiponectin anti-inflammatory action in WAT and a potential target for mitigating obesity-related pathology. PMID:25190567

  2. ADIPOQ single nucleotide polymorphism: Association with adiponectin and lipoproteins levels restricted to men

    Luciane Viater Tureck

    2015-09-01

    Full Text Available Adiponectin is an adipokine inversely correlated with obesity, which has beneficial effect on insulin resistance and lipid metabolism. Considering its potential as a therapeutic target in the metabolic disorder contexts, and in order to add knowledge in the area, our study evaluated the ADIPOQ 276G > T polymorphism effect on adiponectin levels, and on lipoproteins of clinical interest in a population sample composed of 211 healthy individuals. Significant effects were observed only among men: the carriers of heterozygous genotype (GT showed high levels of adiponectin (p = 0.018, while the rare homozygous genotype (TT gave its carriers a negative phenotype, represented by higher levels of low density lipoprotein cholesterol (LDL-C (p = 0.004 and p = 0.005 and total cholesterol (TC (p = 0.010 and p = 0.005 compared to carriers of other genotypes (GG and GT respectively, the independent effect of SNP on LDL-C and TC levels was confirmed by multiple regression analysis (p = 0.008 and p = 0.044. We found no evidence of correlation between circulating adiponectin levels and biochemical markers, which suggests, therefore, an SNP 276G > T independent effect on adiponectin levels and on lipoprotein metabolism in men enrolled in this study.

  3. Study of Leptin and Adiponectin as Disease Markers in Subjects with Obstructive Sleep Apnea

    Sana Al Mutairi

    2014-01-01

    Full Text Available Background. Published studies showed conflicting results of the associations between adiponectin and leptin levels and obstructive sleep apnoea (OSA. In obese patients, plasma leptin is elevated and adiponectin is decreased, and we postulate that these adipokines could be potential markers of clinical and metabolic perturbations in patients with OSA. Methods. 147 patients with suspected OSA had polysomnography to determine the Respiratory Disturbance Index (RDI. We measured fasting plasma glucose (FPG, fasting serum insulin, plasma leptin, adiponectin, and full lipid profile. Patients were classified on the basis of the RDI, degree of adiposity, and insulin resistance (IR (homeostasis model assessment of insulin resistance (HOMAIR. Results. 28.6% of subjects had normal polysomnography, 34.8% had mild OSA, 19.6% had moderate OSA, and 17% had severe OSA. Obesity was more prevalent in subjects with moderate-severe OSA (47%. Adiponectin decreased significantly (P=0.041 with increasing severity of OSA. Though BMI was significantly higher in subjects with severe OSA, paradoxically, leptin was lowest in those subjects independent of gender dimorphism. Conclusions. Adiponectin is an independent marker of disease severity in patients with OSA. The paradoxical decrease in circulating leptin, which suggests impaired secretion, deserves further studies as a potential marker of severe OSA.

  4. Is adiponectin associated with acute myocardial infarction in Iranian non obese patients?

    Sotoodah Abdoreza

    2009-05-01

    Full Text Available Abstract Backgrounds Adiponectin is an adipose tissue-derived mediator with significant anti-atherogenic properties. A few studies were done in acute phase of myocardial infarction especially in non obese patients. We design a study to investigate the association between adiponectin concentration and acute phase of myocardial infarction in non obese patients. Methods This case-control study was done in Paymaneah Hospital (Jahrom, Iran from Feb 2007 to May 2008. Plasma adiponectin levels were measured in 43 patients with AMI (mean age: 62.7 ± 13.3 years, male: 67.4% at the first 24 hours of admission and 43 normal controls (mean age: 62.1 ± 12.3 years, male: 55.8% matched for age, sex and other CAD risk factors. Results Adiponectin levels in patients with AMI (3.36 μg/mL were significantly lower than that of the control group (5.03 μg/mL (p Conclusion The present study showed that adiponectin was associated with AMI in non obese patients but it is not related to sex, age and other CAD risk factors.

  5. Hypoglycemic effects of three Iranian edible plants; jujube, barberry and saffron: Correlation with serum adiponectin level.

    Hemmati, Mina; Asghari, Somaye; Zohoori, Elham; Karamian, Mehdi

    2015-11-01

    One of the most common disorders of the endocrine system is diabetes mellitus. This disease is associated with dyslipidemia. Adiponectin is a protein hormone that secreted by adipocytes and has an important role in regulating of glucose and fatty acid metabolic pathways. This study was designed to investigate the changes in serum level of adiponectin in diabetic rats treated with hydroalcoholic extracts of three medicinal plants; jujube (Ziziphus jujuba), barberry (Berberis vulgaris) and saffron (Crocus sativus) in comparison with quercetin. Streptozotocin -induced diabetic male rats were gavaged with specified doses of the extracts (25 and 100mg/kg) for two weeks. At the end of treatment period, fasting blood specimens were collected. The levels of adiponectin, fasting blood sugar (FBS), total Cholesterol, triglycerides, HDL-C and LDL-C were measured. Statistical analysis showed that serum levels of triglyceride and VLDL decreased significantly (Pplant extracts had no effect on cholesterol. Jujube in two doses (25 and 100mg/kg) could increased significantly HDL-C (P<0.05) with no effect on total cholesterol and LDL-C. Serum adiponectin level increased in all treated groups. These beneficial effects of C. sativus, B. vulgaris and Z. jujube extracts and quercetin in diabetic rats may be associated with increase in adiponectin level. PMID:26639503

  6. Clinical Observation of Adiponectin in Inhibiting Fatty Toxicity by Acupuncture

    徐斌; 袁锦虹; 刘志诚; 吕雅妮; 王欣君; 陈梅; 姜军作

    2006-01-01

    Objective:To investigate if acupuncture has an inhibitory effect on fatty toxicity and its possible mechanism. Methods: Thirty-four patients with simple obesity were clinically treated with acupuncture for 3 courses. Before and after treatment, body mass index(BMI) and fat percentage(F%) were determined, and serum insulin and adiponectin were measured by enzyme linked immunoassay, blood lipid and sugar by biochemical colorimetry and eight kinds of free fatty acids(FFAs) by high performance liquid chromatography. Twenty normal persons were selected as a control. Results:The total efficacy rate was 88.2%. Acupuncture could increase the decreased insulin sensitivity index(ISI) in the patients(t=-5.103, P=0.000). The correlation of a decrease in F% with an increase in unsaturated fatty acid after acupuncture was of significance(r=0.402, P=0.019) and its correlation with an increase in the ratio between unsaturated fatty acid and saturated fatty acid was also of significance(r=0.348, P=0.044). The correlation between increases in high density lipoprotein and in eicosapentaenoic acid was of significance(r=0.352, P=0.041). The correlation between a decrease in BMI and an increase in high density lipoprotein was of significance(r=0.357, P=0.038). Adiponectin level significantly rose after acupuncture (compared with pre-treatment, P=0.000). The correlation between a decrease in FFAs and an increase in adiponectin was of significance(r=-0.349, P=0.043). Conclusion: Acupuncture can lower the levels of free fatty acids in the patients and increase their sensitivity to insulin to inhibit the fatty toxicity. The inhibitory effect of acupuncture on fatty toxicity is somewhat related to a rise in adiponectin level.%目的:探讨针刺是否具有抑制脂毒性的作用,及其可能机制.方法:临床针刺治疗34例单纯性肥胖病患者3个疗程,治疗前后测量体重指数(BMI)、脂肪百分率(F%),酶联免疫法测定血清胰岛素、脂联素,生化比色法测

  7. Haplotypes and Sequence Variation in the Ovine Adiponectin Gene (ADIPOQ

    Qing-Ming An

    2015-11-01

    Full Text Available The adiponectin gene (ADIPOQ plays an important role in energy homeostasis. In this study five separate regions (regions 1 to 5 of ovine ADIPOQ were analysed using PCR-SSCP. Four different PCR-SSCP patterns (A1-D1, A2-D2 were detected in region-1 and region-2, respectively, with seven and six SNPs being revealed. In region-3, three different patterns (A3-C3 and three SNPs were observed. Two patterns (A4-B4, A5-B5 and two and one SNPs were observed in region-4 and region-5, respectively. In total, nineteen SNPs were detected, with five of them in the coding region and two (c.46T/C and c.515G/A putatively resulting in amino acid changes (p.Tyr16His and p.Lys172Arg. In region-1, -2 and -3 of 316 sheep from eight New Zealand breeds, variants A1, A2 and A3 were the most common, although variant frequencies differed in the eight breeds. Across region-1 and region-3, nine haplotypes were identified and haplotypes A1-A3, A1-C3, B1-A3 and B1-C3 were most common. These results indicate that the ADIPOQ gene is polymorphic and suggest that further analysis is required to see if the variation in the gene is associated with animal production traits.

  8. Post-heparin plasma lipoprotein lipase, but not hepatic lipase activity, is related to plasma adiponectin in type 2 diabetic patients and healthy subjects

    De Vries, R; Wolffenbuttel, BHR; Sluiter, WJ; Van Tol, A; Dullaart, RPF

    2005-01-01

    The aim of this study was to determine the relationships of plasma adiponectin with post-heparin plasma lipoprotein lipase (LPL) and hepatic lipase (HL) activities, and to evaluate whether plasma adiponectin contributes to diabetes-associated dyslipidaemia. Plasma adiponectin, post-heparin plasma li

  9. Effect of the diet components on adiponectin levels Efecto de los componentes de la dieta sobre los niveles de adiponectina

    C. E. G. Reis; J. Bressan; R. C. G. Alfenas

    2010-01-01

    The prevalence of obesity has reached epidemic proportions worldwide, which requires nutritional interventions for its effective control. Adiponectin has antiinflammatory capacity, improves glucose tolerance and presents decreased plasma expression and concentration in obese individuals. Studies with animals reveal improvement in insulin resistance after the infusion of adiponectin; in humans, caloric restriction increases its levels. The present study aimed to analyze the effects of dietary ...

  10. The plasma leptin/adiponectin ratio predicts first cardiovascular event in men : A prospective nested case-control study

    Kappelle, Paul J. W. H.; Dullaart, Robin P. F.; van Beek, Andre P.; Hillege, Hans L.; Wolffenbuttel, Bruce H. R.

    2012-01-01

    Objective: The plasma leptin/adiponectin (L/A) ratio has been proposed as a preferential marker of atherosclerosis susceptibility compared to leptin and adiponectin alone. We determined the extent to which the L/A ratio predicts incident cardiovascular disease (CVD) taking account of clinical risk f

  11. Combined Adiponectin Deficiency and Resistance in Obese Patients: Can It Solve Part of the Puzzle in Nonalcoholic Steatohepatitis

    Salman, Ahmed; Hegazy, Mona; AbdElfadl, Soheir

    2015-01-01

    BACKGROUND: Nonalcoholic fatty liver disease (NAFLD) has become the most prevalent cause of liver disease, nonalcoholic steatohepatitis (NASH) and fibrosis in obese patients identifies the risk group with increased incidence of liver-related deaths. AIM: To clarify the role of serum adiponectin and its receptor liver gene expression in the progression of liver damage in NAFLD. METHODS: Fifty four (54) obese patients with NAFLD preliminary diagnosed by liver ultra-sound were recruited. Full medical history, anthropometric measurement, biochemical studies, serum adiponectin level, liver biopsy for histological examination and NAS score to identify NASH patients, and assessment of adiponectin receptor gene expression by RT-PCR, were conducted for each patients. Fifteen ages matched average weight healthy adult had been chosen as a control for serum adiponectin level. RESULTS: According to NAS score, patients were divided into non- NASH (8 patients), and NASH (46 patients). Serum adiponectin level was significantly lower in NAFLD patients compared to normal participants (p < 0.004). Serum adiponectin level was lower in NASH patients (4.437 ± 2.569 ng/dl in NASH vs. 5.138 ± 2.841 ng/dl in non-NASH). Adiponectin receptor liver gene expression was lower in NASH patients (0.8459 ± 0.4671 vs. 1.0688 ± 0.3965 in non-NASH). CONCLUSION: Both adiponectin deficiency and resistance had a role in progression of simple liver steatosis to severe injury in obese patients. PMID:27275239

  12. Type 2 diabetes mellitus is characterized by reduced postprandial adiponectin response: a possible link with diabetic postprandial dyslipidemia.

    Annuzzi, Giovanni; Bozzetto, Lutgarda; Patti, Lidia; Santangelo, Carmela; Giacco, Rosalba; Di Marino, Lucrezia; De Natale, Claudia; Masella, Roberta; Riccardi, Gabriele; Rivellese, Angela A

    2010-04-01

    We investigated postprandial plasma and adipose tissue (AT) adiponectin changes in relation to obesity and type 2 diabetes mellitus. Fasting and 6 hours after a standard fat-rich meal blood samples (adiponectin, glucose, insulin, lipids) and needle biopsies of abdominal subcutaneous AT (adiponectin messenger RNA, lipoprotein lipase activity) were taken in 10 obese diabetic (OD), 11 obese nondiabetic (OND), and 11 normal-weight control (C) men. The OD and OND subjects had similar adiposity (body mass index, waist circumference) and insulin resistance (hyperinsulinemic euglycemic clamp). Fasting plasma adiponectin and AT gene expression were not significantly different between groups. After meal, plasma adiponectin decreased in OD but significantly increased in OND and C, the changes being significantly different between groups (analysis of variance, P = .01); adiponectin messenger RNA decreased in OD (-0.27 +/- 0.25 AU, P = .01) but was unchanged in OND (P = .59) and C (P = .45). After meal, plasma adiponectin correlated inversely with triglyceride and cholesterol concentrations in chylomicrons and large very low-density lipoprotein, and directly with AT lipoprotein lipase activity (P < .05 for all). Type 2 diabetes mellitus is associated with lower postprandial plasma levels and AT gene expression of adiponectin independently of degree of adiposity and whole-body insulin sensitivity. In patients with diabetes, this may exacerbate postprandial abnormalities of lipoprotein metabolism. PMID:19922965

  13. Lower-body fat mass as an independent marker of insulin sensitivity--the role of adiponectin

    Buemann, B; Sørensen, T I A; Pedersen, O; Black, E; Holst, C; Toubro, S; Echwald, S; Holst, Jens Juul; Rasmussen, C; Astrup, A

    2005-01-01

    AIMS: To study the association between lower-body fat and estimates of whole-body insulin sensitivity in middle-aged men with and without a history of juvenile onset obesity, and to determine the possible mediating role of fasting serum adiponectin level as an insulin-sensitizing peptide. METHODS...... partly be statistically explained by variations in serum adiponectin levels....

  14. Preliminary evidence of genetic determinants of adiponectin response to fenofibrate in the Genetics of Lipid Lowering Drugs and Diet Network

    Adiponectin is an adipose-secreted protein that has been linked to changes in insulin sensitivity, high-density lipoprotein cholesterol levels, and inflammatory patterns. Although fenofibrate therapy can raise adiponectin levels, treatment response is heterogeneous and heritable, suggesting a role f...

  15. Exploration on the relationship between insulin resistance and adiponectin, leptin in patients with diabetes mellitus type 2 (DM2)

    Objective: To explore the relationship between development of insulin resistance and the change of adiponectin/leptin ratio in patients with DM2. Methods: Serum adiponectin (with ELISA) and leptin (with RIA) levels were measured in 87 patients with DM2, 25 patients with DM1 and 30 controls. Besides, the levels were measured in another 52 patients with DM2 both before and after one-year treatment. Results: The serum levels of adiponectin in patients with DM2 were significantly lower than those in patients with DM1 and controls (P<0.01). The serum levels of leptin in both the patients with DM1 and DM2 were significantly higher than those in controls with levels in DM2 patients much higher (DM2 vs DM1, P<0.01). The adiponectin/leptin ratio in DM2 patients was significantly smaller than that in DM1 patients (0.211 vs 1.183, P<0.001). In the 52 DM2 patients undergoing one year treatment, the adiponectin levels increased and the leptin levels dropped significantly with the adiponectin/leptin ratio greatly increased (vs before treatment, P<0.05-0.01). Conclusion: Increased insulin resistance in DM2 patients was shown to be in parallel with decreased serum levels of adiponectin and low adiponectin/leptin ratio (usually much lower than 1). (authors)

  16. Plasma adiponectin is modestly decreased during 24-hour insulin infusion but not after inhibition of lipolysis by Acipimox

    Dullaart, RPF; Riemens, SC; Meinardi, [No Value; Wolffenbuttel, BHR; Sluiter, WJ

    2005-01-01

    Objective. Plasma adiponectin is associated with insulin resistance and atherosclerosis. Adiponectin expression in adipose tissue is up-regulated by peroxisome proliferator-activated receptor (PPAR)-gamma agonist treatment and its plasma level may be affected by insulin. We tested the hypothesis tha

  17. Essential roles of insulin, AMPK signaling and lysyl and prolyl hydroxylases in the biosynthesis and multimerization of adiponectin.

    Zhang, Lin; Li, Ming-Ming; Corcoran, Marie; Zhang, Shaoping; Cooper, Garth J S

    2015-01-01

    Post-translational modifications (PTMs) of the adiponectin molecule are essential for its full bioactivity, and defects in PTMs leading to its defective production and multimerization have been linked to the mechanisms of insulin resistance, obesity, and type-2 diabetes. Here we observed that, in differentiated 3T3-L1 adipocytes, decreased insulin signaling caused by blocking of insulin receptors (InsR) with an anti-InsR blocking antibody, increased rates of adiponectin secretion, whereas concomitant elevations in insulin levels counteracted this effect. Adenosine monophosphate-activated protein kinase (AMPK) signaling regulated adiponectin production by modulating the expression of adiponectin receptors, the secretion of adiponectin, and eventually the expression of adiponectin itself. We found that lysyl hydroxylases (LHs) and prolyl hydroxylases (PHs) were expressed in white-adipose tissue of ob/ob mice, wherein LH3 levels were increased compared with controls. In differentiated 3T3-L1 adipocytes, both non-specific inhibition of LHs and PHs by dipyridyl, and specific inhibition of LHs by minoxidil and of P4H with ethyl-3,4-dihydroxybenzoate, caused significant suppression of adiponectin production, more particularly of the higher-order isoforms. Transient gene knock-down of LH3 (Plod3) caused a suppressive effect, especially on the high molecular-weight (HMW) isoforms. These data indicate that PHs and LHs are both required for physiological adiponectin production and in particular are essential for the formation/secretion of the HMW isoforms. PMID:25240468

  18. Alterations in total and high-molecular-weight adiponectin after 3 weeks of moderate alcohol consumption in premenopausal women

    Joosten, M.M.; Witkamp, R.F.; Hendriks, H.F.J.

    2011-01-01

    Moderate alcohol consumption is associated with increased concentrations of adiponectin. Whether this is the case for both total and high–molecular-weight (HMW) adiponectin is uncertain. Furthermore, the rate at which this increase occurs is unclear. Therefore, we examined the effect of moderate alc

  19. Alterations in total and high-molecular-weight adiponectin after 3 weeks of moderate alcohol consumption in premenopausal women

    Joosten, M.M.; Witkamp, R.F.; Hendriks, H.F.J.

    2011-01-01

    Moderate alcohol consumption is associated with increased concentrations of adiponectin. Whether this is the case for both total and high-molecular-weight (HMW) adiponectin is uncertain. Furthermore, the rate at which this increase occurs is unclear. Therefore, we examined the effect of moderate alc

  20. Adiponectin levels measured in dried blood spot samples from neonates born small and appropriate for gestational age

    Klamer, A; Skogstrand, Kristin; Hougaard, D M;

    2007-01-01

    Adiponectin levels measured in neonatal dried blood spot samples (DBSS) might be affected by both prematurity and being born small for gestational age (SGA). The aim of the study was to measure adiponectin levels in routinely collected neonatal DBSS taken on day 5 (range 3-12) postnatal from...

  1. Carbohydrate-related dietary factors and plasma adiponectin levels in healthy adults in the Framingham Offspring Cohort

    Diet may influence circulating adiponectin levels by improving insulin sensitivity. We examined the associations between carbohydrate-related dietary factors and plasma adiponectin levels in healthy adults aged 26–81 y (n= 979 men and 1227 women). Dietary intakes were assessed using a FFQ. Fasting...

  2. Clinical significant of measurement of plasma Hcy and serum adiponectin levels after treatment in patients with acute cerebral infarction

    Objective: To explore the clinical significance of changes of plasma Hcy and serum adiponectin levels after treatment in patients with acute cerebral infarction. Methods: Plasma Hcy (with RIA) and serum adiponectin (with ELISA) levels were determined in 36 patients with acute cerebral infarction both before and after treatment as well as in 35 controls. Results: Before treatment, the plasma Hcy levels were significantly higher than those in controls (P<0.01), while serum adiponectin levels were significantly lower than those in controls (P<0.01), After treatment for three months, the levels, though corrected markedly, remained significantly different from those in controls (P<0.05). Plasma Hcy levels were negatively correlated with serum adiponectin levels (r =-0.4021, P<0.05). Conclusion: Plasma Hcy and serum adiponectin levels were closely related to the diseases process of acute cerebral infarction and determination of which were of great clinical importance. (authors)

  3. Subcutaneous rather than visceral adipose tissue is associated with adiponectin levels and insulin resistance in young men

    Frederiksen, L; Nielsen, T L; Wraae, K;

    2009-01-01

    INTRODUCTION: Studies on the association between adiponectin, body composition, and insulin resistance (IR) have been conflicting. AIM: Our aim was to evaluate the impact of body composition on adiponectin and IR determined by homeostasis model assessment (HOMA) in a population-based study on...... adiponectin levels, and, interestingly, fat on the lower extremities was positively associated with adiponectin. Focusing on insulin resistance, SAT rather than VAT and TFA independently predicted a higher HOMA-IR. The observation that adiponectin was independently associated with lower HOMA-IR must be......, and IR was determined using HOMA. Central fat mass (CFM) and lower extremity fat mass (LEFM) was measured by dual-energy x-ray absorptiometry, and visceral adipose tissue (VAT), sc adipose tissue (SAT), and thigh fat area (TFA) were assessed by magnetic resonance imaging. RESULTS: Using multiple...

  4. Association of Atherosclerotic Peripheral Arterial Disease with Adiponectin Genes SNP+45 and SNP+276: A Case-Control Study

    Claudia D. Gherman

    2013-01-01

    Full Text Available Objectives. We hypothesized that adiponectin gene SNP+45 (rs2241766 and SNP+276 (rs1501299 would be associated with atherosclerotic peripheral arterial disease (PAD. Furthermore, the association between circulating adiponectin levels, fetuin-A, and tumoral necrosis factor-alpha (TNF-α in patients with atherosclerotic peripheral arterial disease was investigated. Method. Several blood parameters (such as adiponectin, fetuin-A, and TNF-α were measured in 346 patients, 226 with atherosclerotic peripheral arterial disease (PAD and 120 without symptomatic PAD (non-PAD. Two common SNPs of the ADIPOQ gene represented by +45T/G 2 and +276G/T were also investigated. Results. Adiponectin concentrations showed lower circulating levels in the PAD patients compared to non-PAD patients (P0.05. Conclusion. The results of our study demonstrated that neither adiponectin SNP+45 nor SNP+276 is associated with the risk of PAD.

  5. The effect of cumulative endurance exercise on leptin and adiponectin and their role as markers to monitor training load.

    Voss, S C; Nikolovski, Z; Bourdon, P C; Alsayrafi, M; Schumacher, Y O

    2016-03-01

    Leptin and adiponectin play an essential role in energy metabolism. Leptin has also been proposed as a marker for monitoring training load. So far, no studies have investigated the variability of these hormones in athletes and how they are regulated during cumulative exercise. This study monitored leptin and adiponectin in 15 endurance athletes twice daily in the days before, during and after a 9-day simulated cycling stage race. Adiponectin significantly increased during the race (p = 0.001) and recovery periods (p = 0.002) when compared to the baseline, while leptin decreased significantly during the race (p supercompensation-like effect. For adiponectin, significant increases were observed within 5 days of commencing racing, with these elevated values failing to return to baseline levels after 3 days of recovery. Additionally, when using leptin and adiponectin to monitor training loads, establishing individual threshold values improves their sensitivity. PMID:26985130

  6. Investigating the causal effect of vitamin D on serum adiponectin using a mendelian randomization approach

    Husemoen, L. L. N.; Skaaby, T.; Martinussen, Torben;

    2014-01-01

    doubling of 25(OH)D was 4.78, 95% CI: 1.96, 7.68, P<0.001). Using variations in the vitamin D-binding protein gene and the filaggrin gene as instrumental variables, the causal effect in % was estimated to 61.46, 95% CI: 17.51, 120.28, P=0.003 higher adiponectin per doubling of 25(OH)D. In the MONICA10......Background/Objectives: The aim was to examine the causal effect of vitamin D on serum adiponectin using a multiple instrument Mendelian randomization approach. Subjects/Methods: Serum 25-hydroxy vitamin D (25(OH)D) and serum total or high molecular weight (HMW) adiponectin were measured in two...

  7. Adiponectin and Mortality in Smokers and Non-Smokers of the Ludwigshafen Risk and Cardiovascular Health (LURIC) Study.

    Delgado, Graciela E; Siekmeier, Rüdiger; März, Winfried; Kleber, Marcus E

    2016-01-01

    Cardiovascular diseases (CVD) are an important cause of morbidity and mortality worldwide. A decreased concentration of adiponectin has been reported in smokers. The aim of this study was to analyze the effect of cigarette smoking on the concentration of adiponectin and potassium in active smokers (AS) and life-time non-smokers (NS) of the Ludwigshafen Risk and Cardiovascular Health (LURIC) Study, and the use of these two markers for risk prediction. Smoking status was assessed by a questionnaire and measurement of plasma cotinine concentration. The serum concentration of adiponectin was measured by ELISA. Adiponectin was binned into tertiles separately for AS and NS and the Cox regression was used to assess the effect on mortality. There were 777 AS and 1178 NS among the LURIC patients. Within 10 years (median) of follow-up 221 AS and 302 NS died. In unadjusted analyses, AS had lower concentrations of adiponectin. However, after adjustment for age and gender there was no significant difference in adiponectin concentration between AS and NS. In the Cox regression model adjusted for age and gender, adiponectin was significantly associated with mortality in AS, but not in NS, with hazard ratio (95 % CI) of 1.60 (1.14-2.24) comparing the third with first tertile. In a model further adjusted for the risk factors, such as diabetes mellitus, hypertension, coronary artery disease, body mass index, LDL-cholesterol and HDL-cholesterol, adiponectin was significantly associated with mortality with hazard ratio of 1.83 (1.28-2.62) and 1.56 (1.15-2.11) for AS and NS, respectively. We conclude that increased adiponectin is a strong and independent predictor of mortality in both AS and NS. The determination of adiponectin concentration could be used to identify individuals at increased mortality risk. PMID:27358181

  8. Reduced plasma adiponectin levels relative to oxidized low density lipoprotein and nitric oxide in coronary artery disease patients

    Gholam Basati

    2011-01-01

    Full Text Available INTRODUCTION: Adiponectin is a circulating hormone that is produced exclusively by adipocytes and has antiinflammatory and anti-atherogenic properties. The hypothesis that there are differences in adiponectin levels between stable and unstable coronary-artery disease patients remains controversial. Furthermore, the potential relationships between the plasma adiponectin level and the inflammatory and non-inflammatory markers (oxidized low density lipoprotein and nitric oxide in patients with stable and unstable coronary-artery disease relative to normal subjects have not been assessed. OBJECTIVES: To assess whether plasma adiponectin levels differ among patients with stable and unstable coronary-artery disease and among control subjects, and to correlate plasma adiponectin level with inflammatory and clinical risk factors (such as oxidized-LDL and nitric oxide in these patients. METHODS: This study included 50 control subjects, 50 stable angina patients and 50 unstable angina patients with angiographically documented coronary-artery disease. Plasma adiponectin and oxidized-LDL levels were determined using an enzyme immunoassay. Plasma nitric oxide, high sensitivity C-reactive protein and lipid profile levels were also measured. RESULTS: Plasma adiponectin levels were lower in the unstable angina patients (4.9 ± 1.30 µg/mL than in the stable angina patients (6.34 ± 1.0 µg/mL or in the controls (9.25 ± 1.8 µg/mL; these levels were also significantly lower in stable angina patients versus controls (p<0.001. Plasma adiponectin levels were negatively correlated with oxidized-LDL, high sensitivity C-reactive protein, lipid profile and other clinical risk factors but positively correlated with nitric oxide. CONCLUSION: Plasma adiponectin levels were found to be lower in both stable and unstable angina patients relative to control subjects, and the correlation between plasma adiponectin and cardiovascular markers is weakened in these patients.

  9. The correlation of adiponectin, IL-6 with insulin resistance and macrovascular lesion in type 2 diabetes

    Objective: To investigate the serum level changes of adiponectin and IL-6 and their relation with macrovascular complications in patients with type 2 diabetes before and after thiazolidinediones intervention. Methods: Serum adiponectin and IL-6 level were examined using ELISA method in 16 patients with obese type 2 diabetes, 24 patients with diabetes with normal body weight, and 14 controls. Their body mass index (BMI) and HOMA-IR were calculated and the internal membrane thickness (IMT) of carotid artery was also observed. These indexes were reexamined after thiazolidinediones (Avandia) intervention and correlation analysis was performed. Results: A decreased serum concentration of adiponectin and an elevated level of IL-6 and HOMA-IR were found in diabetes group especially in those with obesity (P<0.01). Serum adiponectin was negatively correlated with HOMA-IR, BMI, IL-6 and IMT while IL-6 was positively correlated with the above-mentioned indexes. After treatment with thiazolidinediones, the insulin resistance state and adponectin and IL-6 were significantly improved especially in those with obesity (P<0.05, P<0.01). Conclusion: Adiponectin is closed correlated with obesity (P<0.05, P<0.01). Conclusion: Adiponectin is closed correlated with obesity, insulin resistance and macrovascular lesions. IL-6 may be involved in the mechanism of insulin resistance in type 2 diabetes patients especially in the obese diabetes group. In addition to enhance the sensitivity of insulin, thiazolidinediones may play a potential role in anti-inflammation, anti-atherosclerosis and immuno-regulation. (authors)

  10. Changes of Serum Adiponectin and Testosterone Concentrations Following Twelve Weeks Resistance Training in Obese Young Men

    Moradi

    2015-12-01

    Full Text Available Background Circulating levels of adiponectin and testosterone decrease in obese men and this increases risks of cardiovascular disease and diabetes. Objectives The purpose of this study was to survey changes of serum adiponectin and testosterone concentrations following twelve weeks resistance training in obese young men. Patients and Methods In a semi-experimental study, twenty one obese young men were randomly placed in two groups: resistance training (26.5 ± 2.8 years and control (27.4 ± 2.9 years. General characteristics of subjects and serum levels of adiponectin and testosterone were assessed before and after training. Resistance training protocol consisted of twelve weeks weight training (3 sessions per week, 10 exercises, 3 sets of 8 - 12 repetitions in each exercise, intensity 60% - 80% of one repetition maximum, rest between sets 1 minute and between exercises 2 minutes, duration of main training 20 - 40 minutes per each session. Results Resistance training had no significant effect on body weight and body mass index (P > 0.05, whereas it decreased body fat percent (P = 0.017. Also, serum adiponectin (8.1 ± 1.8 vs. 10.5 ± 2.3 μg/mL and testosterone concentrations (6.9 ± 2.4 vs. 8.2 ± 1.7 ng/mL were increased after resistance training (P = 0.033, P = 0.018 respectively, while there were no significant changes in serum levels of these hormones in control group (P > 0.05. Conclusions Twelve weeks of resistance training increased serum concentrations of adiponectin and testosterone in obese young men. With respect to inverse associations between changes of adiponectin and testosterone with BFP and insulin level variations after resistance training, it is recommended that obese young men do resistance training to benefit useful decreasing/preventive effects of this type of training against the risks of cardiovascular diseases and diabetes.

  11. Expression of Adiponectin Receptors in Human Placenta and Its Possible Implication in Gestational Diabetes

    Naglaa F. Al Husseini

    2010-01-01

    Full Text Available Problem statement: Similar to obese patients and type 2 diabetic patients, adiponectin levels are reduced in former Gestational Diabetes Mellitus (GDM patients and are lower in GDM women during late pregnancy compared with pregnant control subjects matched for BMI. Diabetic insult at later stages in gestation, such as may occur in gestational diabetes, will foremost lead to short-term changes in a variety of molecules for key functions including gene expression in the placenta. Approach: In this study we assessed the expression of adiponectin receptors in human placenta to identify the site (s of expression and to clarify the effect of gestational diabetes in this expression. This study was carried on 10 normoglycemic pregnant women and 20 GDM women. The placental tissue was collected immediately after delivery and tissue biopsies were taken from both fetal and maternal sides of each placenta. One step-RT-PCR for ADIPOR1 and ADIPOR2 was done by Real Time PCR using Syber Green technique. Relative quantification of mRNA of the ADIPOR1 and ADIPOR2 genes was measured using ABI7900 Real Time machine. Results: Both types of Adiponectin Receptors (ADIPOR1 and ADIPOR2 are expressed in human placenta. ADIPOR1 is more highly expressed than ADIPOR2 in both fetal and maternal sides of GDM cases and normal pregnant women. ADIPOR1 mRNA expression was significantly up regulated in GDM women compared to normal pregnant women, whereas no significant difference in the expression of ADIPOR2 was detected between the two groups. There was no evidence of maternal-fetal side difference in the expression of adiponectin receptors in GDM cases but in normal pregnant women there is a statistically significant difference between both sides in the expression of both ADIPOR1 and ADIPOR2. Conclusion: We concluded that adiponectin plays an important role in mediation the glucose metabolism in fetal tissues through its receptors, mainly Adiponectin Receptor 1 (ADIPOR1.

  12. Plasma resistin, adiponectin and leptin levels in relation to insulin resistance

    Adipose tissue regulates insulin sensitivity via the circulating adipo cytokines, adiponectin, resistin and leptin. The objective of this study was to compare the levels of resistin, adiponectin and leptin in lean and obese subjects and determine the relationship between circulating adipocytokines and insulin resistance. We examined plasma levels of resistin, adiponectin and leptin in 20 lean subjects with mean body mass index (BMI) of 24, and, 36 nondiabetic obese individuals with mean BMI 34. Insulin resistance was assessed using the homeostasis model assessment ratio (HOMA-R) formula derived from fasting insulin and glucose levels. Resistin levels were not significantly different between the two groups but were significantly higher in women compared with men, 30.4±6.5 vs. 14.4±2.9 mg/l, P<0.01. Resistin did not correlate with BMI but did significantly correlate with HOMA-R, P < 0.01, and this correlation remained significant after adjustment for gender and BMI. Adiponectin levels were significantly reduced in obese compared with lean subjects, P < 0.005 and higher in women, P< 0.001. Adiponectin levels showed significant correlation with HOMA-R and this correlation remained significant after adjustment for gender and BMI. Leptin levels were significantly higher in obese subjects and women and correlated with resistin, but, didn't correlate with HOMA-R. In this small group of patients we demonstrated that insulin resistance correlated most strongly and reciprocally with adiponectin levels. Significant correlation between resistin levels and insulin resistance was also observed. Although a similar trend was apparent for leptin, the correlation with insulin resistance did not achieve statistical significance

  13. Myocardial mitochondrial and contractile function are preserved in mice lacking adiponectin.

    Martin Braun

    Full Text Available Adiponectin deficiency leads to increased myocardial infarct size following ischemia reperfusion and to exaggerated cardiac hypertrophy following pressure overload, entities that are causally linked to mitochondrial dysfunction. In skeletal muscle, lack of adiponectin results in impaired mitochondrial function. Thus, it was our objective to investigate whether adiponectin deficiency impairs mitochondrial energetics in the heart. At 8 weeks of age, heart weight-to-body weight ratios were not different between adiponectin knockout (ADQ-/- mice and wildtypes (WT. In isolated working hearts, cardiac output, aortic developed pressure and cardiac power were preserved in ADQ-/- mice. Rates of fatty acid oxidation, glucose oxidation and glycolysis were unchanged between groups. While myocardial oxygen consumption was slightly reduced (-24% in ADQ-/- mice in isolated working hearts, rates of maximal ADP-stimulated mitochondrial oxygen consumption and ATP synthesis in saponin-permeabilized cardiac fibers were preserved in ADQ-/- mice with glutamate, pyruvate or palmitoyl-carnitine as a substrate. In addition, enzymatic activity of respiratory complexes I and II was unchanged between groups. Phosphorylation of AMP-activated protein kinase and SIRT1 activity were not decreased, expression and acetylation of PGC-1α were unchanged, and mitochondrial content of OXPHOS subunits was not decreased in ADQ-/- mice. Finally, increasing energy demands due to prolonged subcutaneous infusion of isoproterenol did not differentially affect cardiac contractility or mitochondrial function in ADQ-/- mice compared to WT. Thus, mitochondrial and contractile function are preserved in hearts of mice lacking adiponectin, suggesting that adiponectin may be expendable in the regulation of mitochondrial energetics and contractile function in the heart under non-pathological conditions.

  14. Structural and functional similarities between osmotin from Nicotiana tabacum seeds and human adiponectin.

    Marco Miele

    Full Text Available Osmotin, a plant protein, specifically binds a seven transmembrane domain receptor-like protein to exert its biological activity via a RAS2/cAMP signaling pathway. The receptor protein is encoded in the gene ORE20/PHO36 and the mammalian homolog of PHO36 is a receptor for the human hormone adiponectin (ADIPOR1. Moreover it is known that the osmotin domain I can be overlapped to the β-barrel domain of adiponectin. Therefore, these observations and some already existing structural and biological data open a window on a possible use of the osmotin or of its derivative as adiponectin agonist. We have modelled the three-dimensional structure of the adiponectin trimer (ADIPOQ, and two ADIPOR1 and PHO36 receptors. Moreover, we have also modelled the following complexes: ADIPOQ/ADIPOR1, osmotin/PHO36 and osmotin/ADIPOR1. We have then shown the structural determinants of these interactions and their physico-chemical features and analyzed the related interaction residues involved in the formation of the complexes. The stability of the modelled structures and their complexes was always evaluated and controlled by molecular dynamics. On the basis of these results a 9 residues osmotin peptide was selected and its interaction with ADIPOR1 and PHO36 was modelled and analysed in term of energetic stability by molecular dynamics. To confirm in vivo the molecular modelling data, osmotin has been purified from nicotiana tabacum seeds and its nine residues peptide synthesized. We have used cultured human synovial fibroblasts that respond to adiponectin by increasing the expression of IL-6, TNF-alpha and IL-1beta via ADIPOR1. The biological effect on fibroblasts of osmotin and its peptide derivative has been found similar to that of adiponectin confirming the results found in silico.

  15. STUDY ON OBESITY RELATED FACTORS: FFA, LEPTIN AND ADIPONECTIN IN SUBJECTS WITH VARYING GLUCOSE TOLERANCE

    顾卫琼; 洪洁; 张翼飞; 宁光; 陈名道; 唐金凤

    2005-01-01

    Objective To study the fasting serum levels of obesity related factors: FFA, leptin and adiponectin in subjects with varying glucose tolerance and their relationship with BMI, insulin sensitivity index and islet beta-cell function. Methods Serum levels of FFA, leptin and adiponectin in 24 normal, 32 simple obese, 34IGT and 36 T2DM subjects were measured by ACS-ACOD assay or RIA. Results The serum levels of leptin and FFA in three groups: simple obese, IGT and DM were much higher than those in normal control (P<0. 001 ). In contrast, serum level of adiponectin of simple obese, IGT and DM groups were significant lower than that of normal control, among them DM subjects had the lowest level ( P<0. 001 ). Correlation analysis showed that FFA was positively correlated to BMI, WHR, FBG, fasting insulin level and negatively correlated to SI; adiponectin was negatively correlated to BMI, WHR, FBG, PBG, but positively correlated to SI and AIRg; and leptin was positively correlated to BMI, fasting insulin and AIRg when negatively correlated to FBG and SI. None of them was correlated to age.Conclusion Subjects with insulin resistance have high serum FFA and leptin levels but low serum adiponectin level.With the glucose tolerance deterioration, serum FFA level increases much higher while the adiponectin deceases much lower. Unlike insulin, none of these obesity related factors can be used as the simple indicating or determining factor of SI, though each of them, to different extent, takes part in the development of insulin resistance.

  16. Association between adiponectin concentrations and diabetic retinopathy in patients with type 2 diabetes: a meta analysis

    Fan Xiaohong; Wu Qunhong; Li Yuan; Hao Yanhua; Ning Ning; Kang Zheng; Cui Yu

    2014-01-01

    Background Numerous studies have investigated the association between adiponectin concentrations and diabetic retinopathy (DR) caused by type 2 diabetic mellitus.However,the results remain conflicting.We performed a metaanalysis to explore the relationship between adiponectin concentrations and risk of DR caused by type 2 diabetic mellitus from published articles.Methods A published literature search was performed through the PubMed,Cochrane Library,EMBASE,Science Citation Index Expanded database,Chinese CNKI,and Chinese Wan Fang databases for articles published in English and Chinese.Pooled standardized mean differences (SMDs) and 95% confidence intervals (95% Cls) were calculated using random or fixed effects model.Heterogeneity between studies was assessed using the Cochrane Q test and/2 statistics.Results Nineteen studies with a total of 1 545 cases and 1 502 controls were retrieved.The original meta-analysis found a significant difference in the adiponectin concentrations between the DR and non-DR (NDR) groups.After excluding the high heterogeneity studies,the second meta-analysis also demonstrated the significant association (SMD (95% CI) =-0.62 (-0.80 to-0.44),P=0.0001).According to the available data,there was statistical significance in the adiponectin concentrations considering non-proliferative DR (NPDR) versus NDR,PDR versus NPDR in Chinese populations with high heterogeneity.Conclusion Adiponectin concentrations are correlated with DR; however,the relationship between adiponectin concentrations and DR needs more in-depth investigations with larger sample sizes.

  17. Relationship of adiponectin level with lipid profile in type-2 diabetic men with coronary heart disease

    Cerebro-vascular disease is a commonest long term complication of type-2 diabetes mellitus. The study was done to determine concentration of serum adiponectin and lipid profile in type-2 diabetic men with coronary heart disease (CHD) in the region of Khyber Pakhtunkhwa (KPK), and to find possible relationship between them. Methods: This was a cross-sectional study comprising of randomly selected thirty six healthy adult males and thirty six type-2 diabetic males with coronary heart disease. Their fasting blood samples were analysed for serum adiponectin, fasting blood glucose, glycosylated haemoglobin and lipid profile which included total cholesterol (T-C), triglycerides (TG), high-density lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C). The relationship of adiponectin with other variables in type-2 diabetic men with coronary heart disease was determined with Pearson correlations coefficient (r). Results: Type-2 diabetic males with coronary heart disease when compared to healthy males showed significantly low levels of serum adiponectin (p=<0.001) and HDL-C (p=<0.001) and significantly high level of FBG (p=<0.001), HbA1c (p=<0.001), TC (p=<0.05), TG (p=<0.05) and LDL-C (p=<0.05). Serum adiponectin level showed a significant negative correlation with FBG (r = -0.332; p= 0.04), HbA1c (r = -0.818; p=<0.01) and TG (r = -0.640; p=<0.01) in type-2 diabetic men with coronary heart disease. Adiponectin showed a significant positive association with HDL-C in controls (r = 0.948; p=<0.01) and patients of type-2 diabetes with CHD (r = 0.650; p=<0.01). Conclusion: Serum adiponectin concentration is markedly decreased in patients of type-2 diabetes with coronary heart disease. Hypoadiponectinemia is related with deranged lipid profile, i.e., high TG and low HDL-C levels in type-2 diabetic men with CHD. Moreover, adiponectin is associated positively with HDL-C and negatively with HbA1c and TG levels in the studied population. (author)

  18. Comparison of Aerobic, Resistance and Concurrent Exercise on Lipid Profiles and Adiponectin in Sedentary Men

    Mohammad-Ali Azarbayjani; bahram abedi

    2012-01-01

    Introduction: Recently adiponectin has appeared to be a modulator of lipid metabolism. But its response to physical activity is not clear yet. The purpose of this study was to determine the effects of type of exercise on lipid profiles and adiponectin in sedentary men. Methods: In this quasi-experimental research a sample of thirty male subjects were randomly assigned into 3 groups of aerobic exercise (AE), (AE: 60-70% of their maximal oxygen consumption (Vo¬2max) for 30 min), resistance exer...

  19. Adiponectin is required for cardiac MEF2 activation during pressure overload induced hypertrophy.

    Dadson, Keith; Turdi, Subat; Hashemi, Sarah; Zhao, Jianzhong; Polidovitch, Nazar; Beca, Sanja; Backx, Peter H; McDermott, John C; Sweeney, Gary

    2015-09-01

    Cardiomyocyte (CM) hypertrophy and increased heart mass in response to pressure overload are associated with hyper-activation of the myocyte enhancer factor-2 (MEF2) family of transcriptional regulators, and concomitant initiation of the fetal gene program. Adiponectin, an adipokine that is reduced in individuals with obesity and diabetes, has been characterized both as a negative regulator or permissive factor in cardiac hypertrophy. We therefore sought to analyze temporal regulation of MEF2 activity in response to pressure overload (PO) and changes in adiponectin status. To address this we crossed a well characterized transgenic MEF2 "sensor" mouse (MEF2-lacZ) with adiponectin null mice (Ad-KO) to create compound MEF2 lacZ/Ad-KO mice. Initially, we established that transverse aortic banding induced PO in wild-type (WT) mice increased heart mass and CM hypertrophy from 1 to 4weeks following surgery, indicated by increased CM diameter and heart weight/tibia length ratio. This was associated with cardiac dysfunction determined by echocardiography. Hypertrophic changes and dysfunction were observed in Ad-KO mice 4weeks following surgery. MEF2 lacZ activity and endogenous ANF mRNA levels, used as indicators of hypertrophic gene activation, were both robustly increased in WT mice after MTAB but attenuated in the Ad-KO background. Furthermore, activation of the pro-hypertrophic molecule p38 was increased following MTAB surgery in WT mice, but not in Ad-KO animals, and treatment of primary isolated CM with recombinant adiponectin induced p38 phosphorylation in a time dependent manner. Adiponectin also increased MEF2 activation in primary cardiomyocytes, an effect attenuated by p38 MAPK inhibition. In conclusion, our data indicate that robust hypertrophic MEF2 activation in the heart in vivo requires a background of adiponectin signaling and that adiponectin signaling in primary isolated CM directly enhances MEF2 activity through activation of p38 MAPK. We conclude that

  20. Effects of pioglitazone on serum leptin and adiponectin in polycystic ovary syndrome patients with insulin resistance

    2010-01-01

    Objective To investigate the effects of pioglitazone on serum leptin and adiponectin in polycystic ovary syndrome(PCOS)patients with insulin resistance(IR).Methods Thirty-five PCOS patients with IR were treated with pioglitazone 15mg/d for 12 weeks.The results of ovulation induction were observed.The changes of fasting plasma glucose(FPG),fasting serum insulin(FINS),serum levels of leptin,adiponectin,follicle-stimulating hormone(FSH),luteinizing hormone(LH),testosterone(T)and blood fat were examined at the ...

  1. Total and high molecular weight adiponectin have similar utility for the identification of insulin resistance

    Aguilar-Salinas Carlos A

    2010-06-01

    Full Text Available Abstract Background Insulin resistance (IR and related metabolic disturbances are characterized by low levels of adiponectin. High molecular weight adiponectin (HMWA is considered the active form of adiponectin and a better marker of IR than total adiponectin. The objective of this study is to compare the utility of total adiponectin, HMWA and the HMWA/total adiponectin index (SA index for the identification of IR and related metabolic conditions. Methods A cross-sectional analysis was performed in a group of ambulatory subjects, aged 20 to 70 years, in Mexico City. Areas under the receiver operator characteristic (ROC curve for total, HMWA and the SA index were plotted for the identification of metabolic disturbances. Sensitivity and specificity, positive and negative predictive values, and accuracy for the identification of IR were calculated. Results The study included 101 men and 168 women. The areas under the ROC curve for total and HMWA for the identification of IR (0.664 vs. 0.669, P = 0.74, obesity (0.592 vs. 0.610, P = 0.32, hypertriglyceridemia (0.661 vs. 0.671, P = 0.50 and hypoalphalipoproteinemia (0.624 vs. 0.633, P = 0.58 were similar. A total adiponectin level of 8.03 μg/ml was associated with a sensitivity of 57.6%, a specificity of 65.9%, a positive predictive value of 50.0%, a negative predictive value of 72.4%, and an accuracy of 62.7% for the diagnosis of IR. The corresponding figures for a HMWA value of 4.25 μg/dl were 59.6%, 67.1%, 51.8%, 73.7% and 64.2%. The area under the ROC curve of the SA index for the identification of IR was 0.622 [95% CI 0.554-0.691], obesity 0.613 [95% CI 0.536-0.689], hypertriglyceridemia 0.616 [95% CI 0.549-0.683], and hypoalphalipoproteinemia 0.606 [95% CI 0.535-0.677]. Conclusions Total adiponectin, HMWA and the SA index had similar utility for the identification of IR and metabolic disturbances.

  2. Relation of Serum Adiponectin Levels to Number of Traditional Atherosclerotic Risk Factors and All-Cause Mortality and Major Adverse Cardiovascular Events (from the Copenhagen City Heart Study)

    Lindberg, Soren; Mogelvang, Rasmus; Pedersen, Sune H;

    2013-01-01

    Adiponectin exerts anti-inflammatory and antiatherogenic effects and appears to protect against arteriosclerosis. Accordingly, an association between low concentrations of plasma adiponectin and cardiovascular (CV) disease has been demonstrated in several studies. In contrast, elevated plasma adi...... nonfatal myocardial infarction or ischemic stroke (n = 502). High adiponectin was inversely associated with an increasing number of traditional CV risk factors (p...... adiponectin has been associated with increased mortality and an increasing number of major adverse CV events (MACE). Because of these conflicting results, the true role of adiponectin remains to be elucidated. In the Copenhagen City Heart Study, we prospectively followed up 5,624 randomly selected men and...

  3. Adiponectin Promotes Human Jaw Bone Marrow Stem Cell Osteogenesis.

    Pu, Y; Wu, H; Lu, S; Hu, H; Li, D; Wu, Y; Tang, Z

    2016-07-01

    Human jaw bone marrow mesenchymal stem cells (h-JBMMSCs) are multipotent progenitor cells with osteogenic differentiation potential. The relationship between adiponectin (APN) and the metabolism of h-JBMMSCs has not been fully elucidated, and the underlying mechanism remains unclear. The aim of the study was to investigate the effect and mechanism of APN on h-JBMMSC metabolism. h-JBMMSCs were obtained from the primary culture of human jaw bones and treated with or without APN (1 µg/mL). Osteogenesis-related gene expression was evaluated by real-time polymerase chain reaction (PCR), alkaline phosphatase (ALP) activity assay, and enzyme-linked immunosorbent assay (ELISA). To further investigate the signaling pathway, mechanistic studies were performed using Western blotting, immunofluorescence, lentiviral transduction, and SB202190 (a specific p38 inhibitor). Alizarin Red staining showed that APN promoted h-JBMMSC osteogenesis. Real-time PCR, ALP assay, and ELISA showed that ALP, osteocalcin (OCN), osteopontin, and integrin-binding sialoprotein were up-regulated in APN-treated cells compared to untreated controls. Immunofluorescence revealed that adaptor protein containing a pleckstrin homology domain, phosphotyrosine domain, and leucine zipper motif (APPL1) translocated from the nucleus to the cytoplasm with APN treatment. Additionally, the phosphorylation of p38 mitogen-activated protein kinase (MAPK) increased over time with APN treatment. Moreover, knockdown of APPL1 or p38 MAPK inhibition blocked the expression of APN-induced calcification-related genes including ALP, Runt-related transcription factor 2 (RUNX2), and OCN. Furthermore, Alizarin Red staining of calcium nodes was not increased by the knockdown of APPL1 or p38 inhibition. Our data suggest that this regulation is mediated through the APPL1-p38 MAPK signaling pathway. These findings collectively provide evidence that APN induces the osteogenesis of h-JBMMSCs through APPL1-mediated p38 MAPK activation

  4. The i148m Pnpla3 polymorphism influences serum adiponectin in patients with fatty liver and healthy controls

    Valenti Luca

    2012-08-01

    Full Text Available Abstract Background Reduced adiponectin is implicated in the pathogenesis of nonalcoholic fatty liver disease (NAFLD and steatohepatitis (NASH, and the I148M Patatin-like phospholipase domain-containing 3 (PNPLA3 polymorphism predisposes to NAFLD and liver damage progression in NASH and chronic hepatitis C (CHC by still undefined mechanisms, possibly involving regulation of adipose tissue function. Aim of this study was to evaluate whether the I148M PNPLA3 polymorphism influences serum adiponectin in liver diseases and healthy controls. Methods To this end, we considered 144 consecutive Italian patients with NAFLD, 261 with CHC, 35 severely obese subjects, and 257 healthy controls with very low probability of steatosis, all with complete clinical and genetic characterization, including adiponectin (ADIPOQ genotype. PNPLA3 rs738409 (I148M and ADIPOQ genotypes were evaluated by Taqman assays, serum adiponectin by ELISA. Adiponectin mRNA levels were evaluated by quantitative real-time PCR in the visceral adipose tissue (VAT of 35 obese subjects undergoing bariatric surgery. Results Adiponectin levels were independently associated with the risk of NAFLD and with the histological severity of the disease. Adiponectin levels decreased with the number of 148 M PNPLA3 alleles at risk of NASH both in patients with NAFLD (p = 0.03, and in healthy subjects (p = 0.04. At multivariate analysis, PNPLA3 148 M alleles were associated with low adiponectin levels (ADIPOQ genotype (OR 1.67, 95% c.i. 1.07-2.1 for each 148 M allele. The p.148 M PNPLA3 variant was associated with decreased adiponectin mRNA levels in the VAT of obese patients (p PNPLA3 and ADIPOQ genotypes and viral features. Conclusions The I148M PNPLA3 variant is associated with adiponectin levels in patients with NAFLD and in healthy subjects, but in the presence of adiponectin resistance not in CHC patients. The I148M PNPLA3 genotype may represent a genetic determinant of serum

  5. STUDY OF SERUM ADIPONECTIN LEVELS IN TYPE 2 DIABETIC INDIVIDUALS & ITS COR R ELATION WITH BMI AND WAIST HIP RATIO

    Arshiya

    2015-01-01

    Full Text Available Adipose tissue is not simply an inert storage depot for lipids but an important endocrine organ. It secretes many hormones called Adipocytokines which include Adiponectin , which increase insulin sensitivity , has an ti - inflammatory and anti atherogenic properties. OBJECTIVES: To study serum Adiponectin levels in type II DM individuals and compare the results with healthy controls and also to study the effect of BMI and WHR on serum Adiponectin levels. MATERIALS AND ME THOD: The study was carried out in seventy seven subjects who included 6 healthy male controls and 6 healthy female controls , 30 diabetic males and 35 diabetic female individuals. The healthy controls both male and female of age around 40 to 50 years (+5 years were selected with no history of diabetes or hypertension. The study group were selected of the same age as the control group from the Outpatient Department , Diabetology unit , of our Medical College. Individuals Height , Weight and Waist Hip Ratio we re measured and BMI was calculated with the formula - Weight in Kg/ Height in m². Estimation of serum Adiponectin with Human Adiponectin/Acrp 30 Immunoassay by Solid - phase ELISA which employs – Quantitative Sandwich Enzyme Immunoassay Technique. Plasma Gluc ose by GOD/POD method. RESULTS: The result shows that 1. Males have low levels of Adiponectin when compared to females which is not statistically significant and could be due to androgens like testosterone which inhibits the secretion of Adiponectin from a dipocytes. 2. Comparison of serum Adiponectin levels in type 2 DM subjects and healthy controls shows statistically significant decrease in Serum Adiponectin levels (P Value < 0.05 in type II DM subjects. 3. Negative correlation between serum Adiponectin and WHR and BMI but it is not statistically significant. CONCLUSION : Serum Adiponectin levels are decreased in Type II DM individuals. Adiponectin may be considered as one of the significant novel markers in

  6. Adiponectin receptor 1 mediates the difference in adiponectininduced prostaglandin E2 production in rheumatoid arthritis and osteoarthritis synovial fibroblasts

    ZUO Wei; WU Zhi-hong; WU Nan; DUAN Yuan-hui; WU Ju-tai; WANG Hai; QIU Gui-xing

    2011-01-01

    Background The synovial fluid concentrations of adiponectin are significantly higher in patients with rheumatoid arthritis (RA) than in patients with osteoarthritis (OA).Accumulating evidence suggests that adiponectin may be an inducer of inflammation in arthritis,but the mechanism remains unclear.The objectives of this study were to compare the expression levels of adiponectin receptors in rheumatoid arthritis synovial fibroblasts (RASF) and osteoarthritis synovial fibroblasts (OASF),evaluate the roles of adiponectin receptors in adiponectin-induced prostaglandin E2 (PGE2) production,and then investigate the effects of a nonsteroidal anti-inflammatory drug (NSAID) and a cyclooxygenase (COX)-2-selective inhibitor on adiponectin-induced PGE2 release.Methods The expressions of adiponectin receptor 1 (AdipoR1) and AdipoR2 mRNA and protein in synovial fibroblasts from seven patients with RA and eight patients with OA undergoing total knee replacement were evaluated by real-time polymerase chain reaction,immunofluorescence microscopy and Western blotting analysis.Adiponectin-induced PGE2 production was detected by enzyme-linked immunosorbent assay.RNA interference against the AdipoR1 and AdipoR2 genes was performed to investigate the effects of the adiponectin receptors on adiponectin-induced PGE2 production in both RASF and OASF.Results AdipoR1 and AdipoR2 mRNA and protein were expressed by both RASF and OASF.Compared with OASF,RASF exhibited higher levels of AdipoR1,but there was no significant difference for AdipoR2.Adiponectin induced the production of PGE2 by the synovial fibroblasts in a concentration-dependent manner,and this was more obvious in RASF.RNA interference showed that the difference may be mediated by the diverse distribution of AdipoR1.The adiponectin-induced PGE2 production was efficiently relieved by the NSAID and COX-2-selective inhibitor.Conclusion The present findings suggest that AdipoR1 may mediate the difference in adiponectin-induced PGE2

  7. Comparison of Serum Adiponectin in Smoke-induced Pulmonary Emphysema Rats Fed Different Diets

    Rui-Ying Wang; Hu Liu; Li-Juan Ma; Jian-Ying Xu

    2016-01-01

    Background:Smoking and body mass index (BMI) are the key risk factors for chronic obstructive pulmonary disease (COPD).Adiponectin with both anti-inflammatory and pro-inflammatory properties is a vital modulator of inflammatory processes,which is expressed in epithelial cells in the airway in COPD-emphysema.The aim of this study was to examine the effects of adiponectin on tobacco smoke-induced emphysema in rats,which were fed different diets.Methods:Seventy-six adult (6-8 weeks old) male Sprague-Dawley rats (average weight 220 ± 20 g) were exposed to smoke or smoke-free room atmosphere and fed different diets (regular,high-fat,or low-fat diets) for 6 months.The rats were randomly divided into six groups.They are nonsmoke-exposed regular diet (n 10),nonsmoke-exposed high-fat diet (n =14),nonsmoke-exposed low-fat diet (n =14),smoke-exposed regular diet (n = 10),smoke-exposed high-fat diet (n =14),and smoke-exposed low-fat diet groups (n =14).A full 23 factorial design was used to evaluate the effect of independent variables on smoke exposure and different rearing methods.Serum adiponectin and inflammatory cytokines were measured by the enzyme-linked immunosorbent assay (ELISA).Results:Serum adiponectin levels in rats fed low-fat and regular diets exposed to smoke exposure were remarkably higher than that of rats exposed to room air while serum adiponectin levels of fat-rich diet rats exposed to tobacco smoke were lower than that of rats exposed to room air.Compared with regular diet or low-fat diet group,serum adiponectin levels in high-fat diet rats exposed to tobacco smoke were lower (t =6.932,11.026;all P < 0.001).BMI was inversely correlated with serum adiponectin levels (r =-0.751,P =0.012).Serum interleukin 6 (IL-6),tumor necrosis factor-α (TNF-α),and 4-hydroxy 2-nonenal (HNE) levels in rats exposed to low-fat or fat-rich diets were remarkably higher than that of rats exposed to normal diets (IL-6,t =4.196,3.480;P < 0.01,P =0.001;TNF-α,t =4

  8. Association of Plasma Adiponectin and Oxidized Low-Density Lipoprotein with Carotid Intima-Media Thickness in Diabetic Nephropathy

    Georgoulidou, Anastasia; Roumeliotis, Athanasios; Roumeliotis, Stefanos; Giannakopoulou, Efstathia; Papanas, Nikolaos; Passadakis, Ploumis; Manolopoulos, Vangelis G.; Vargemezis, Vassilis

    2015-01-01

    Aims. We sought to determine the association between levels of adiponectin and oxidized low-density lipoprotein (ox-LDL) in patients with diabetic nephropathy as well as their effect on carotid intima-media thickness (cIMT). Methods. Adiponectin and ox-LDL were determined in 25 diabetic patients without nephropathy and 94 patients at different stages of diabetic nephropathy including subjects on hemodialysis. cIMT was measured using real-time B-mode ultrasonography. Results. Plasma adiponectin levels increased significantly with severity of diabetic nephropathy (P = 0.002), on the contrary to ox-LDL which decreased with disease severity (P < 0.001). cIMT was significantly higher at late stages of diabetic nephropathy compared with early stages (P = 0.022). Adiponectin was a significant negative predictor of ox-LDL levels (β = −5.45, P = 0.023), independently of confounding factors. There was no significant correlation between cIMT and adiponectin or ox-LDL either in the total sample population or according to disease staging. Cluster analysis showed that patients with the highest cIMT values, highest levels of adiponectin, and lowest levels of ox-LDL were included in one cluster and all assigned to stage 5 of diabetic nephropathy. Conclusions. There was no significant association between adiponectin or ox-LDL and cIMT and, therefore, other factors affecting this surrogate marker of cardiovascular disease in diabetic nephropathy should be sought. PMID:26064982

  9. Adiponectin is associated with cardiovascular disease in male renal transplant recipients: baseline results from the LANDMARK 2 study

    Mudge David

    2009-10-01

    Full Text Available Abstract Background Adiponectin is a major adipocyte-derived protein with insulin-sensitizing, anti-inflammatory and anti-atherogenic properties. Adiponectin levels correlate inversely with renal function and higher levels are predictive of lower cardiovascular disease (CVD in patients with normal renal function and chronic kidney disease. No data exists on the association between adiponectin and CVD in renal transplant recipients (RTR. Methods Standard biochemistry, clinical data and adiponectin were collected from 137 RTR recruited to the LANDMARK 2 study at baseline. The LANDMARK 2 study is an ongoing randomized controlled study that compares the outcome of aggressive risk factor modification for cardiovascular disease versus standard post-transplant care in renal transplant recipients with impaired glucose tolerance or diabetes mellitus. Results Mean patient age was 53.4 ± 12 years and the median post-transplantation period was 5 (0.5-31.9 years. Mean serum adiponectin level was 12.3 ± 7.1 μg/mL. On univariate analysis, adiponectin was positively associated with female gender (P = 0.01 and serum high-density lipoprotein (HDL concentration (P Conclusion In conclusion, adiponectin is positively correlated with inflammation, dyslipidemia and abnormal glucose tolerance in RTR. Furthermore, hypoadiponectinemia correlated with increased baseline CVD in male RTR.

  10. Adiponectin Inhibits Nutrient Transporters and Promotes Apoptosis in Human Villous Cytotrophoblasts: Involvement in the Control of Fetal Growth.

    Duval, Fabien; Santos, Esther Dos; Poidatz, Dorothée; Sérazin, Valérie; Gronier, Héloïse; Vialard, François; Dieudonné, Marie-Noëlle

    2016-05-01

    The placenta exchanges nutrients between the mother and the fetus and requires a constant abundant energy supply. Adiponectin (a cytokine produced primarily by adipose tissue) controls glucose and lipid homeostasis. It is well-known that maternal serum adiponectin levels are inversely related to birth weight, suggesting that adiponectin has a negative effect on fetal growth. This effect appears to be related to the control of nutrient transporters in human placenta. However, the underlying molecular mechanisms have not yet been characterized. In the present work, we studied adiponectin's direct effect on human primary cytotrophoblasts from first-trimester placenta. Our result showed that in placental cells, adiponectin 1) inhibits the expression of the major glucose transporters (GLUT1 and GLUT12) and sodium-coupled neutral amino acid transporters (SNAT1, SNAT2, and SNAT4), 2) enhances total ATP production but decreases lactate production, 3) inhibits mitochondrial biogenesis and function, and 4) stimulates cell death by enhancing the expression of the pro-apoptotic B-cell lymphoma-2 (BCL-2)-associated X protein (BAX) and tumor protein P53 (TP53) gene expression and inducing the caspase activity. Small-interfering RNA mediating the down-regulation of adiponectin receptors (ADIPOR1 and ADIPOR2) was used to demonstrate that adiponectin effects on placental nutrient transport and apoptosis seemed to be essentially mediated by these specific receptors. Taken as a whole, these results strongly suggest that adiponectin regulates human placental function by limiting nutrient transporter expression and inducing apoptosis. These findings may help us to better understand adiponectin's role in placental pathologies such as intrauterine growth restriction, which is characterized by fetal weight loss and drastic apoptosis of placental cells. PMID:27030046

  11. Effect of 12 Weeks of Periodized Resistance Training Upon Total Plasma Adiponectin Concentration in Healthy Young Men.

    Davis, Greggory R; Stephens, Jacqueline M; Nelson, Arnold G

    2015-11-01

    The effects of resistance training on adiponectin have thus far yielded equivocal results. However, the effect of periodized resistance training on plasma adiponectin in offspring of type 2 diabetic and nondiabetic (ND) parents (first-degree family history) has yet to be determined. Untrained healthy young men with and without a first-degree family history of type 2 diabetes were assigned to an exercise intervention group (E) or an active control group (C). The E group performed a 12-week periodized resistance training program, whereas the C group did not participate in any structured exercise program. Fasting plasma samples were obtained pre- and posttraining. Total plasma adiponectin changed significantly in the E group (33.7 ± 14.7%, p = 0.025) but not in the C group (10.8 ± 19.2%). Offspring of type 2 diabetic parents subjects had significantly greater improvements in plasma adiponectin (69.3 ± 34.8%) compared with ND subjects (-3.2 ± 29.9%, p = 0.046). Regular aerobic exercise was significantly correlated with average plasma adiponectin (r = 0.32), whereas first-degree family history of type 2 diabetes (r = -0.58) and decreases in body fat percentage (r = -0.77) were inversely correlated with average plasma adiponectin. Periodized high-intensity resistance training seems to increase plasma adiponectin, particularly in individuals with a first-degree family history of type 2 diabetes or those who experience a significant loss of fat mass. The direct correlation between regular aerobic exercise and adiponectin further suggests that a combination of aerobic and resistance training yields greater improvements in plasma adiponectin compared with resistance training alone. PMID:26274372

  12. Association between Reduction of Plasma Adiponectin Levels and Risk of Bacterial Infection after Gastric Cancer Surgery

    Hiroshi Yamamoto; Kazuhisa Maeda; Yoshitaka Uji; Hiroshi Tsuchihashi; Tsuyoshi Mori; Tomoharu Shimizu; Yoshihiro Endo; Aya Kadota; Katsuyuki Miura; Yusuke Koga; Toshinori Ito; Tohru Tani

    2013-01-01

    BACKGROUND AND PURPOSE: Infections are important causes of postoperative morbidity after gastric surgery; currently, no factors have been identified that can predict postoperative infection. Adiponectin (ADN) mediates energy metabolism and functions as an immunomodulator. Perioperative ADN levels and perioperative immune functioning could be mutually related. Here we evaluated a potential biological marker to reliably predict the incidence of postoperative infections to prevent such comorbidi...

  13. Roles of PPAR-gamma and AMPK in physiological control of adiponectin

    Flachs, Pavel; Rossmeisl, Martin; Mohamed-Ali, V.; Foretz, M.; Viollet,, B.; Kopecký, Jan

    2006. s. 22-22. [FASEB summer research conferences. 12.08.2006-17.08.2006, Snowmass] R&D Projects: GA MŠk(CZ) 1M0520 Institutional research plan: CEZ:AV0Z50110509 Keywords : EPA/ DHA * adiponectin Subject RIV: FB - Endocrinology, Diabetology, Metabolism, Nutrition

  14. Does dietary iodine regulate oxidative stress and adiponectin levels in human breast milk?

    Gutiérrez-Repiso, Carolina; Velasco, Inés; Garcia-Escobar, Eva; Garcia-Serrano, Sara; Rodríguez-Pacheco, Francisca; Linares, Francisca; Ruiz de Adana, Maria Soledad; Rubio-Martin, Elehazara; Garrido-Sanchez, Lourdes; Cobos-Bravo, Juan Francisco; Priego-Puga, Tatiana; Rojo-Martinez, Gemma; Soriguer, Federico; García-Fuentes, Eduardo

    2014-02-10

    Little is known about the association between iodine and human milk composition. In this study, we investigated the association between iodine and different markers of oxidative stress and obesity-related hormones in human breast milk. This work is composed of two cross-sectional studies (in lactating women and in the general population), one prospective and one in vitro. In the cross-sectional study in lactating women, the breast milk iodine correlated negatively with superoxide dismutase (SOD), catalase, and glutathione peroxidase (GSH-Px) activities, and with adiponectin levels. An in vitro culture of human adipocytes with 1 μM potassium iodide (KI, dose similar to the human breast milk iodine concentration) produced a significant decrease in adiponectin, GSH-Px, SOD1, and SOD2 mRNA expression. However, after 2 months of treatment with KI in the prospective study, a positive correlation was found between 24-h urinary iodine and serum adiponectin. Our observations lead to the hypothesis that iodine may be a factor directly involved in the regulation of oxidative stress and adiponectin levels in human breast milk. PMID:24001137

  15. Elevated adiponectin prevents HIV protease inhibitor toxicity and preserves cerebrovascular homeostasis in mice.

    Dasuri, Kalavathi; Pepping, Jennifer K; Fernandez-Kim, Sun-Ok; Gupta, Sunita; Keller, Jeffrey N; Scherer, Philipp E; Bruce-Keller, Annadora J

    2016-06-01

    HIV protease inhibitors are key components of HIV antiretroviral therapies, which are fundamental in the treatment of HIV infection. However, the protease inhibitors are well-known to induce metabolic dysfunction which can in turn escalate the complications of HIV, including HIV associated neurocognitive disorders. As experimental and epidemiological data support a therapeutic role for adiponectin in both metabolic and neurologic homeostasis, this study was designed to determine if increased adiponectin could prevent the detrimental effects of protease inhibitors in mice. Adult male wild type (WT) and adiponectin-overexpressing (ADTg) mice were thus subjected to a 4-week regimen of lopinavir/ritonavir, followed by comprehensive metabolic, neurobehavioral, and neurochemical analyses. Data show that lopinavir/ritonavir-induced lipodystrophy, hypoadiponectinemia, hyperglycemia, hyperinsulinemia, and hypertriglyceridemia were attenuated in ADTg mice. Furthermore, cognitive function and blood-brain barrier integrity were preserved, while loss of cerebrovascular markers and white matter injury were prevented in ADTg mice. Finally, lopinavir/ritonavir caused significant increases in expression of markers of brain inflammation and decreases in synaptic markers in WT, but not in ADTg mice. Collectively, these data reinforce the pathophysiologic link from metabolic dysfunction to loss of cerebrovascular and cognitive homeostasis; and suggest that preservation and/or replacement of adiponectin could prevent these key aspects of HIV protease inhibitor-induced toxicity in clinical settings. PMID:26912411

  16. Novel loci for adiponectin levels and their influence on type 2 diabetes and metabolic traits

    Dastani, Zari; Hivert, Marie-France; Timpson, Nicholas;

    2012-01-01

    Circulating levels of adiponectin, a hormone produced predominantly by adipocytes, are highly heritable and are inversely associated with type 2 diabetes mellitus (T2D) and other metabolic traits. We conducted a meta-analysis of genome-wide association studies in 39,883 individuals of European...

  17. Characterization of the Expression of CTRP9, a Paralog of Adiponectin

    HUANG Ziwen; CUI Ting; LIU Jing; ZHUANG Yuan; MENG Qinghang; TAO Litao; LI Zhen

    2008-01-01

    Adiponectin is one of the hormones secreted exclusively by the adipose tissue with anti-diabetic,anti-inflammatory,anti-atherogenic,anti-atherosclerotic,and insulin-sensitizing effects.Adiponectin has structural features including a signal peptide at the N terminus,a short variable region,a collagenous domain,and a C-terminal globular domain homologous to Clq.The family of proteins containing this globular domain is called the Clq/tumor necrosis factor-α-related proteins (CTRP).Among all the CTRPs characterized so far,the CTRP9 protein has the highest homology to adiponectin.However,little is known about the functions of CTRP9.This study examines the tissue expression of CTRP9 as well as the ex-pression of CTRP9 during mouse development and 3T3-L1 preadipocyte differentiation.The effects of LPS,TNFα,and starvation on the expression of CTRP9 were also investigated.CTRP9 mRNA is shown to be expressed in a variety of tissues including the adipose tissues.The expression profile of CTRP9 dif-fers from that of adiponectin,implying that they are functionally diverse although structurally homologous.

  18. Adiponectin and cardiovascular remodeling in end-stage renal disease and co-morbid diabetes mellitus

    D. Karakitsos; E. de Groot; A.P. Patrianakos; F. Parthenakis; J. Boletis; A. Karabinis; J. Kyriazis; P. Vardas; E. Daphnis

    2006-01-01

    Objectives and Methods: Altered plasma high-sensitivity C-reactive protein (hs-CRP) and adiponectin (ADP) may contribute to increased vascular inflammation and accelerated atherosclerosis in patients with end-stage renal disease (ESRD) and co-morbid diabetes. Common carotid artery intima-media thick

  19. Effects of Simvastatin on adiponectin and endothelial function in apolipoprotein E-deficient mice

    Meng Liu; Donghua Yin; Ming Gui; Kejiang Cao

    2009-01-01

    0bjective:To investigate the effects of simvastatin,a 3-hydroxy-3-methylglutaryl coenzyme A(HMG-CoA) reductase inhibitor,on adiponectin and markers of endothelial function in apolipoprotein E-deficient mice at an early stage of atherosclerosis.Methods:Twenty-four 6-week old male apoE-deficient mice were randomly divided into two groups:control group(normal saline) and treatment group[simvastatin(5 mg/(kg·d)].Simvastatin was administered to treatment group mice by gavage and the same volume of normal saline was administered to control group mice by the same method for 4 weeks.Total cholesterol(TC),superoxide dismutase(SOD),malondialdehyde (MDA),and nitric oxide(NO) were measured by biochemical analysis,and adiponectin was measured by an ABC-ELISA method.Results:There was no significant difference in serum TC between control and treatment groups.Compared with the control animals,simvastafin-treated animals exhibited a significant increase in serurn levels of adponectin,SOD and NO,and decrease in serum MDA(P <0.01).Conclusion:Simvastatin protects endothelial function by increasing serum adiponectin,which may increase serum SOD and NO,and decrease serum MDA.This study suggests that sirnvastatin has therapeutic advantages,unrelated to its cholesterol-lowering effect,that are mediated by adiponectin.

  20. New Insight into Adiponectin Role in Obesity and Obesity-Related Diseases

    Ersilia Nigro

    2014-01-01

    Full Text Available Obesity is a major health problem strongly increasing the risk for various severe related complications such as metabolic syndrome, cardiovascular diseases, respiratory disorders, diabetic retinopathy, and cancer. Adipose tissue is an endocrine organ that produces biologically active molecules defined “adipocytokines,” protein hormones with pleiotropic functions involved in the regulation of energy metabolism as well as in appetite, insulin sensitivity, inflammation, atherosclerosis, cell proliferation, and so forth. In obesity, fat accumulation causes dysregulation of adipokine production that strongly contributes to the onset of obesity-related diseases. Several advances have been made in the treatment and prevention of obesity but current medical therapies are often unsuccessful even in compliant patients. Among the adipokines, adiponectin shows protective activity in various processes such as energy metabolism, inflammation, and cell proliferation. In this review, we will focus on the current knowledge regarding the protective properties of adiponectin and its receptors, AdipoRs (“adiponectin system”, on metabolic complications in obesity and obesity-related diseases. Adiponectin, exhibiting antihyperglycemic, antiatherogenic, and anti-inflammatory properties, could have important clinical benefits in terms of development of therapies for the prevention and/or for the treatment of obesity and obesity-related diseases.

  1. The Association of Adiponectin with Computed Tomography Phenotypes in Chronic Obstructive Pulmonary Disease

    Carolan, Brendan J.; Kim, Yu-Il; Williams, André A.; Kechris, Katerina; Lutz, Sharon; Reisdorph, Nichole; Bowler, Russell P.

    2013-01-01

    Rationale: Chronic obstructive pulmonary disease (COPD) is a heterogeneous disorder associated with systemic manifestations that contribute to its morbidity and mortality. Recent work suggests that biomarker signatures in the blood may be useful in evaluating COPD phenotypes and may provide insight into the pathophysiology of systemic manifestations. Adiponectin, primarily produced by fat cells, has been implicated in the pathophysiology of emphysema.

  2. Relation of Serum Leptin and Adiponectin Level to Serum C-Reactive Protein: The INTERLIPID Study

    Yasuyuki Nakamura

    2013-01-01

    Full Text Available Objective. Despite considerable study, the relevance of leptin and adiponectin for atherosclerosis development is still unsettled. We investigated relations of serum leptin and adiponectin to serum C-reactive protein (CRP, using the INTERLIPID dataset on Japanese emigrants living in Hawaii and Japanese in Japan. Design and Methods. Serum leptin, adiponectin, and CRP were measured by standardized methods in men and women of ages 40 to 59 years from two population samples, one Japanese-American in Hawaii (83 men, 89 women and the other Japanese in central Japan (111 men, 104 women. Participants with CRP >10 mg/L were excluded. Results. Sex-specific multiple linear regression analyses, with log-transformed leptin and adiponectin (log-leptin, log-adipo, site (Hawaii = 1, Japan = 0, SBP, HbA1c, smoking (cigarettes/day, and physical activity index score of the Framingham Offspring Study as covariates, showed that log-leptin directly related and log-adipo inversely related to log-CRP for both sexes (Ps < 0.05 to <0.01. Addition to the model of BMI and interaction terms (BMI × log-leptin, BMI × log-adipo, SITE × log-leptin, SITE × log-adipo resulted in disappearance of statistical significance except for direct relation of log-leptin to log-CRP in men (P=0.006. Conclusions. Leptin directly related to CRP independent of BMI and other confounding factors in men but not in women.

  3. Adiponectin and the mediation of HDL cholesterol change with improved lifestyle: The Look AHEAD Study

    Adipose tissue dysfunction plays a key role in the development of the metabolic abnormalities characteristic of type 2 diabetes (T2DM) and participates actively in lipid metabolism. Adiponectin, found abundantly in circulation and a marker of adipose health, is decreased in obese persons with T2DM. ...

  4. Dietary factors associated with plasma high molecular weight and total adiponectin levels in apparently healthy women

    Yannakoulia, Mary; Yiannakouris, Nikos; Melistas, Labros; Fappa, Evaggelia; Vidra, Nikoletta; Kontogianni, Meropi D; Mantzoros, Christos S

    2008-01-01

    OBJECTIVE: Our aim was to investigate associations between dietary factors and high molecular weight (HMW) as well as total adiponectin in a sample of apparently healthy adult Mediterranean women. DESIGN AND METHODS: Two hundred and twenty women were enrolled in this study. Anthropometric and body c

  5. Total Adiponectin and Risk of Symptomatic Lower Extremity Peripheral Artery Disease in Men

    Joosten, Michel M.; Joshipura, Kaumudi J.; Pai, Jennifer K.; Bertoia, Monica L.; Rimm, Eric B.; Mittleman, Murray A.; Mukamal, Kenneth J.

    2013-01-01

    Objective-Lower concentrations of adiponectin have been linked to subsequent risk of coronary heart disease in healthy individuals. Whether similar relationships exist for the development of systemic atherosclerosis, such as peripheral artery disease (PAD), is uncertain. We investigated the associat

  6. Serum resistin and adiponectin concentrations in patients with overweight and obesity

    LUO Rong; LI Xiao-ping; ZHAO Yan

    2007-01-01

    Objective:To explore the serum levels of resistin and adiponectin in patients with overweight and obesity. Methods: Fifty-eight cases with normal weight and 24 patients with overweight and obesity have taken fasting blood samples for measurements of plasma glucose, plasma lipids, insulin, C-peptide,thyroid hormones, C-response protein, interleukin-6, TNF-α, leptin, adiponectin and resistin. Results:The concentrations of resistin in cases with overweight and obesity were significant higher than those in the normal weight cases (16.01± 8. 60 vs 11. 63+ 9. 05 ng/ml, P = 0. 047). Pearson relation analysis showed that serum resistin concentrations were positively correlated with age (r= 0. 476, P= 0. 019), but negatively correlated with C-peptide (r=- 0.45, P = 0. 024), and adiponectin concentrations were positively correlated with HDL-c (r=0. 463, P=0. 023) and systolic blood pressure (r=0. 409, P=0. 047) in overweight and obesity cases. Conclusion: The concentrations of resistin in cases with over-weight and obesity are higher, and there is no correlation between resistin and blood glucose, blood lipids and insulin,while the serum adiponectin concentrations positively correlated with HDL-c and systolic blood pressure.

  7. Metabolic Risk Susceptibility in Men Is Partially Related to Adiponectin/Leptin Ratio

    Gloria Lena Vega; Grundy, Scott M.

    2013-01-01

    Background. High adiponectin/leptin ratio may be protective from metabolic risks imparted by high triglyceride, low HDL, and insulin resistance. Methods. This cross-sectional study examines plasma adipokine levels in 428 adult men who were subgrouped according to low (

  8. Adiponectin as a target for the treatment of nonalcoholic steatohepatitis with thiazolidinediones: A systematic review.

    Polyzos, Stergios A; Mantzoros, Christos S

    2016-09-01

    Thiazolidinediones (TZDs; pioglitazone and rosiglitazone) have provided promising results in clinical trials for nonalcoholic steatohepatitis (NASH). The main purpose of this systematic review was to summarize evidence on circulating adiponectin levels in relation to histological changes following TZD treatment in patients with histologically confirmed NASH. We performed a systematic search in PubMed, Scopus and Cochrane Library. We included four studies, published between 2006 and 2012, providing data for 187 histologically confirmed NASH adult patients (105 on TZD and 82 controls) treated for 6-12months. Significant increase in adiponectin (80-178%) after TZD treatment was observed in all included studies. Improvement in steatosis following treatment was observed in all studies. A trend towards improvement in lobular inflammation was observed in all studies after pioglitazone, but not after rosiglitazone. Trends toward improvement in ballooning and fibrosis were observed in the two studies after pioglitazone using either the highest doses or the longest duration of therapy. Overall disease activity score was improved in all studies after pioglitazone, but not after rosiglitazone. Insulin resistance and liver function tests were also improved after treatment. Despite weight gain, circulating leptin was not increased after treatment. In conclusion, parallel increases in circulating adiponectin levels and histological improvement were observed in this systematic review. These results warrant further consideration of TZDs, but even more importantly point to a key role for novel potential treatments for NASH patients such as the newer selective peroxisome proliferator activated receptor-γ modulators, which increase adiponectin without significant weight gain. PMID:27506737

  9. Osmotin: a plant sentinel and a possible agonist of mammalian adiponectin

    S. eANIL KUMAR

    2015-03-01

    Full Text Available Osmotin is a stress responsive antifungal protein belonging to the pathogenesis-related (PR-5 family that confers tolerance to both biotic and abiotic stresses in plants. Protective efforts of osmotin in plants range from high temperature to cold and salt to drought. It lyses the plasma membrane of the pathogens. It is widely distributed in fruits and vegetables. It is a differentially expressed and developmentally regulated protein that protects the cells from osmotic stress and invading pathogens as well, by structural or metabolic alterations. During stress conditions, osmotin helps in the accumulation of the osmolyte proline, which quenches reactive oxygen species and free radicals. Osmotin expression results in the accumulation of storage reserves and increases the shelf-life of fruits. It binds to a seven-transmembrane-domain receptor-like protein and induces programmed cell death in Saccharomyces cerevisiae through RAS2/cAMP signaling pathway. Adiponectin, produced in adipose tissues of mammals, is an insulin-sensitizing hormone. Strangely, osmotin acts like the mammalian hormone adiponectin in various in vitro and in vivo models. Adiponectin and osmotin, the two receptor binding proteins do not share sequence similarity at the amino acid level, but interestingly they have a similar structural and functional properties. In experimental mice, adiponectin inhibits endothelial cell proliferation and migration, primary tumor growth, and reduces atherosclerosis. This retrospective work examines the vital role of osmotin in plant defense and as a potential targeted therapeutic drug for humans.

  10. Effects of adiponectin on oxidative stress and apoptosis in human cardiac myocytes cultured with high glucose

    LI Xing; LI Mei-rong; GUO Zhi-xin

    2012-01-01

    Background Diabetic cardiomyopathy is the major cause of morbidity and mortality in diabetic patients.Oxidative stress plays an important role in diabetic cardiomyopathy.This study aimed to investigate the effects of adiponectin on oxidative stress and apoptosis in human cardiac myocytes (HCM) cultured with high glucose.Methods The cells were assigned to three group: control group,high glucose group and high glucose plus adiponectin group.After culture for 24,48,72 hours,oxidative stress was evaluated by detecting levels of malondialdehyde (MDA)and superoxide dismutase (SOD) in the supernatant of culture media.The expression of p66Shc and Heme oxygenase-1 (HO-1) was detected by real-time polymerase chain reaction (PCR).Flow cytometry was designed to observe and detect cellular apoptosis.Results Our findings showed significant increase in MDA levels and decrease in SOD activity in the high glucose group compared with the control group (P <0.05).However,MDA levels were significantly decreased and SOD activity was significantly increased in the adiponectin group compared with those in the high-glucose group (P <0.05).The mRNA expression of HO-1 in the high glucose group was significantly increased in a time-dependent manner compared with that in the control group (P <0.05).Adiponectin further increased the mRNA expression of HO-1 induced by high glucose in a time-dependent manner (P <0.05).The expression of p66Shc was significantly increased in high glucose group compared with that in the control group (P <0.05).Adiponectin significantly suppressed the upregulation of p66Shc induced by high glucose (P <0.05).The apoptotic rate of cardiomyocytes was significantly increased in the high glucose group compared with that in the control group while the apoptotic rate in the adiponectin group was remarkably declined in comparison with that in the high glucose group.Conclusion Adiponectin reduces high glucose-induced oxidative stress and apoptosis and plays a

  11. CRP and Adiponectin and Its Oligomers in the Metabolic Syndrome: Evaluation of New Laboratory-Based Biomarkers

    Devaraj, Sridevi; Swarbrick, Michael M.; Singh, Uma; Adams-Huet, Beverley; Havel, Peter J.; Jialal, Ishwarlal

    2008-01-01

    The metabolic syndrome (MetS) confers an increased risk for diabetes and cardiovascular disease. Although high-sensitive C-reactive protein (hsCRP) concentrations are higher and adiponectin concentrations lower in MetS, there is no reliable biochemical measure that can capture its various features. We evaluated whether hsCRP, adiponectin, or the ratio of adiponectin or its oligomers, especially the high-molecular-weight (HMW) oligomer, to hsCRP predict MetS in 123 subjects with MetS compared ...

  12. Single Nucleotide Polymorphism (SNP) in the Adiponectin Gene and Cardiovascular Disease.

    Chirumbolo, Salvatore

    2016-07-01

    Dear Editor, The recent article by Mohammadzadeh et al.[1] on the latest issue of this Journal showed that the T allele +276G/T SNP of ADIPOQ gene is more associated with the increasing risk of coronary artery disease (CAD) in subjects with type 2 diabetes. Adipocytes were described in myocardial tissue of CAD patients and their role recently discussed[2,3]. Susceptibility to CAD by polymorphism in the Q gene of adiponectin has been reported for 3'-UTR, which harbours some genetic loci associated with metabolic risks and atherosclerosis[4]. Actually, previous studies have shown that the haplotype SNP +276G>T was associated with a decreased risk of CAD, after adjustment for potential confounding factors, therefore some controversial opinion still exists[5]. This evidence should be associated with the role exerted by adipocytes and adiponectin in heart physiology. In particular, in hypertensive disorder complicating pregnancy (HDCP), by investigating the population frequency of alleles, genotypes, and haplotypes of two single nucleotide polymorphisms (SNPs), namely +45T>G (rs2241766) and +276G>T (rs1501299), some authors found that the SNP +276 TT genotype was significantly associated with protection against HDCP, when compared to the pooled G genotypes[6]. Moreover, the same +276G/T SNP haplotype was strongly associated with biliary atresia, an intractable neonatal inflammatory and obliterative cholangiopathy, leading to progressive fibrosis and cirrhosis[7]. CAD is closely related to adiponectin biology. The same isoforms of adiponectin seem to be not associated to CAD severity but to glucose metabolism and its impairment[8]. In the paper by Mohammadzadeh et al.[1], T allele in +276G/T SNP haplotype is highly associated with CAD in subjects with type 2 diabetes, but this linkage should be reappraised if related much more to diabetes rather than CAD. Association of T allele in the indicated SNP with CAD may be an indirect consequence of type 2 diabetes, as reported

  13. Postprandial plasma adiponectin response is reduced in prepubertal premature pubarche girls.

    Larqué, Elvira; Gil-Campos, Mercedes; Villada, Isabel; Ramírez-Tortosa, M Carmen; Cañete, Ramón; Gil, Angel

    2010-09-01

    The association between premature pubarche (PP) and metabolic syndrome is controversial and not supported by some authors. The aim of this study was to determine insulin resistance syndrome, plasma adiponectin, and fatty acid profile in PP girls to discern potential confounder variables and markers of metabolic disturbances. We studied 22 prepubertal girls with a diagnosis of PP and 20 healthy controls who differed in body mass index (BMI) (19.33 +/- 0.71 vs 17.30 +/- 0.60). We evaluated insulin resistance syndrome components and postprandial response of adiponectin, nonesterified fatty acids, and fatty acid profile after consumption of a standardized breakfast. No lipid disturbances were detected in the PP group. High-density lipoprotein to low-density lipoprotein cholesterol ratio tended to be lower in PP girls (P = .052), but this effect disappeared when data were adjusted for both BMI and age (P = .480). Insulin levels tended to be higher at 2 hours in PP girls, who showed significantly higher C-peptide area under the curve. In contrast, adiponectin at 3 hours after the meal and postprandial adiponectin area under the curve were significantly lower. The PP girls showed significantly higher percentages of eicosapentaenoic acid in total plasma and plasma phospholipids. No differences were found in the postprandial fatty acid clearance rate. In conclusion, PP girls and controls differed in postprandial plasma adiponectin response and in postprandial plasma C-peptide response after both BMI and age adjustment. Cholesterol plasma disturbances were mainly attributable to their higher BMI, although n-3 polyunsaturated fatty acids were higher because of the PP. PMID:20096425

  14. Phycocyanin prevents hypertension and low serum adiponectin level in a rat model of metabolic syndrome.

    Ichimura, Mayuko; Kato, Shigeko; Tsuneyama, Koichi; Matsutake, Sachiko; Kamogawa, Mai; Hirao, Eri; Miyata, Ayako; Mori, Sawako; Yamaguchi, Noriaki; Suruga, Kazuhito; Omagari, Katsuhisa

    2013-05-01

    Endothelial dysfunction is associated with hypertension, atherosclerosis, and metabolic syndrome. Phycocyanin is a pigment found in the blue-green algae, Spirulina, which possesses antihypertensive effect. In this study, we hypothesized that phycocyanin derived from Spirulina exerts antihypertensive actions by improving endothelial dysfunction in metabolic syndrome. Spontaneously hypertensive/NIH-corpulent (SHR/NDmcr-cp) rats were divided into 4 groups then fed a normal diet with or without phycocyanin (2500-, 5000-, or 10,000-mg/kg diet) for 25 weeks. At 34 weeks of age, although systolic blood pressure was not significantly different among groups, phycocyanin-fed groups exhibited a dose-dependent decrease in blood pressure. Serum levels of adiponectin and messenger RNA levels of adiponectin and CCAAT/enhancer-binding protein α in the adipose tissue of rats fed diets containing phycocyanin tended to be higher than those of rats fed a normal diet, but the differences were not statistically significant. Immunohistochemistry analysis showed a significant and positive correlation between aortic endothelial nitric oxide synthase (eNOS) expression levels, a downstream target of the adiponectin receptor, and serum adiponectin levels, although there were no significant differences in eNOS expression among groups. There was also no significant correlation between eNOS expression levels and systolic blood pressure. These results suggest that long-term administration of phycocyanin may ameliorate systemic blood pressure by enhancing eNOS expression in aorta that is stimulated by adiponectin. Phycocyanin may be beneficial for preventing endothelial dysfunction-related diseases in metabolic syndrome. PMID:23684441

  15. Osteopontin and adiponectin: how far are they related in the complexity of psoriasis?

    Kadry, D; Hegazy, R A; Rashed, L

    2013-12-01

    Increasing attention has been drawn towards the involvement of both osteopontin (OPN) and adiponectin in psoriasis. The relationship between them has been studied before in the context of essential hypertension. To our knowledge, whether a relation between them exists in cases of psoriasis and the metabolic status in such patients have not been investigated. We aimed to verify their possible roles and relations in psoriasis and its metabolic associations. 35 patients with psoriasis vulgaris and 35 controls were included. Patients were clinically assessed by PASI and investigated for the presence of metabolic syndrome (MetS) and/or its components. Plasma levels of OPN and adiponectin were measured using ELISA. On comparing psoriatics to controls, patients showed significantly elevated levels of OPN (90.474 ± 21.22 vs 34.709 ± 13.95 ng/mL) and significantly depressed levels of adiponectin (4,586 ± 1.187 vs 5,905 ± 1.374 ng/mL), (p patients (r = -0.912, p index, and MetS. This study demonstrates for the first time a significant correlation between OPN and adiponectin in psoriasis, hypothesized to be mostly attributed to the inflammatory milieu of psoriasis and MetS as well as the enhanced renin-angiotensin-aldosterone system previously documented in psoriasis. Adjuvant therapies aiming at modulating levels of OPN and adiponectin are speculated to add benefit in psoriasis treatment and protecting against its metabolic risks. PMID:23884541

  16. Adiponectin and C - reactive protein Relationship in the Polycystic Ovary Syndrome: Relation to Cardiovascular Disease

    The polycystic ovary syndrome (PCOS), one of the most common reproductive abnormalities, shares some components of the metabolic cardiovascular syndrome. Therefore, PCOS patients may represent the largest group of women at high risk for the development of early-onset cardiovascular disease (CVD) and/or diabetes. The adipokine, adiponectin inhibits vascular inflammation and acts as an endogenous modulator of obesity - linked diseases. High - sensitive C-reactive protein (hs-CRP) is recently debated as a risk factor and mediator for atherosclerosis. The objective of this study was to investigate the relation between adiponectin and hs- CRP in The Polycystic Ovary Syndrome and to identify their relation to Cardiovascular Disease. Adiponectin and hs- CRP measurements were undertaken in 90 PCOS patients and 70 body mass index-matched controls with regular menstrual cycles. Whereas 36.8% of the PCOS patients had CRP levels above 5 mg/liter, only 9.6% of the controls exhibited high CRP levels (P < 0.001). The mean ± SD was 5.46 ± 7.0 in the PCOS group vs. 2.04 ± 1.9 mg/liter in the control (P < 0.001). The body mass index, white blood cell count, TSH, glucose, cholesterol, and homocysteine levels were not significantly different between the two groups. CRP levels are elevated in patients with PCOS and may be a marker of early cardiovascular risk in these patients. The plasma adiponectin levels being significantly lower in these patients. These results suggest that elevation of CRP and reduction of adiponectin could emerge as mediators of atherogenesis and insulin resistance. (author)

  17. Telmisartan attenuates isoproterenol-induced cardiac remodeling in rats via regulation of cardiac adiponectin expression

    Bing-yan GUO; Yong-jun LI; Rui HAN; Shao-1ing YANG; Ying-hui SHI; De-rong HAN; Hong ZHOU; Mei WANG

    2011-01-01

    Aim:To investigate whether telmisartan(Telm)pretreatment attenuates isoproterenol(Iso)-induced postinfarction remodeling(PIR)in rats, and whether the effect of Telm is associated with cardiac expression of adiponectin.Methods:PIR was induced in male Wistar rats with two consecutive injections of Iso(80 mg/kg,sc)at an interval of 24 h.Primary Culture of ventricular myocytes from neonatal rats was prepared.Iso-induced cardiomyocyte injury was assessed based on cell growth and lactate dehydrogenase(LDH)activity.Cardiac adiponectin expression was measured using qRT-PCR and immunoblot analysis.Results:In the rats with PIR.Telm(10 mg·kg-1·d-1,po for 65 d)suppressed lso-induced increases in gravimetric parameters.cardiomyocyte diameter and collagen volume fraction,but had no effect on Iso-induced myocardial hypertrophy and interstitial fibrosis.The protective effect of Telm was associated with enhanced protein expression of cardiac adiponectin.In cultured cardiomyocytes,Telm (5-20 μmol/L)inhibited the celI death and LDH release induced by lSO(10 μmol/L).and reversed Iso-induced reduction in adiponectinprotein expression.In cardiomyocytes exposed to Iso(20 μmol/L).GW9662(30 μmol/L),a selective antagonist of PPAR-v,blocked the effects of Telm Dretreatment on adiponectin protein expression,as well as the protective effects of Telm on Iso-induced celI injUry.Conclusion:Telm attenuates Iso-induced cardiac remodeling and cell injury,which is associated with induction of cardiac adiponectin expression.

  18. Positive correlation between serum taurine and adiponectin levels in high-fat diet-induced obesity rats.

    You, Jeong Soon; Zhao, Xu; Kim, Sung Hoon; Chang, Kyung Ja

    2013-01-01

    The purpose of this study was to investigate the relationship between serum taurine level and serum adiponectin or leptin levels in high-fat diet-induced obesity rats. Five-week-old male Sprague-Dawley rats were randomly divided into three groups for a period of 8 weeks (normal diet, N group; high-fat diet, HF group; high-fat diet + taurine, HFT group). Taurine was supplemented by dissolving in feed water (3% w/v), and the same amount of distilled water was orally administrated to N and HF groups. In serum, adiponectin level was higher in HFT group compared to HF group. The serum taurine level was negatively correlated with serum total cholesterol (TC) level and positively correlated with serum adiponectin level. These results suggest that dietary taurine supplementation has beneficial effects on total cholesterol and adiponectin levels in high-fat diet-induced obesity rats. PMID:23392875

  19. Levels of adiponectin and leptin at onset of type 1 diabetes have changed over time in children and adolescents

    Safai, Narges; Eising, Stefanie; Hougaard, David Michael;

    2015-01-01

    Adiponectin and leptin are proteins secreted by the adipose tissue and have an influence on insulin sensitivity and on inflammatory markers. Altered levels could play a part in the pathogenesis of type 1 diabetes mellitus. We determined adiponectin and leptin levels over a nine-year period in...... diagnosed T1D (n = 482) were included, and healthy siblings (n = 479) were chosen as a control group. Leptin levels were significantly higher in recent years (in both patients and siblings), whereas for adiponectin, the levels were lower in recent years in the patient group. Leptin levels were lower in...... children with T1D (RR 0.74, p = 0.003) and in males (RR 0.52, p < 0.001) and increasing with age in both groups. For adiponectin, there was a negative association between level and age in patients. Both adipokines showed a significant correlation with BMI and lower levels in children with blood samples...

  20. Adiponectin stimulates autophagy and reduces oxidative stress to enhance insulin sensitivity during high-fat diet feeding in mice.

    Liu, Ying; Palanivel, Rengasamy; Rai, Esther; Park, Min; Gabor, Tim V; Scheid, Michael P; Xu, Aimin; Sweeney, Gary

    2015-01-01

    Numerous studies have characterized the antidiabetic effects of adiponectin, yet the precise cellular mechanisms in skeletal muscle, in particular, changes in autophagy, require further clarification. In the current study, we used a high-fat diet (HFD) to induce obesity and insulin resistance in wild-type (WT) or adiponectin knockout (Ad-KO) mice with and without adiponectin replenishment. Temporal analysis of glucose tolerance and insulin sensitivity using hyperinsulinemic-euglycemic clamp and muscle insulin receptor substrate and Akt phosphorylation demonstrated exaggerated and more rapid HFD-induced insulin resistance in skeletal muscle of Ad-KO mice. Superoxide dismutase activity, the reduced glutathione-to-glutathione disulfide ratio, and lipid peroxidation indicated that HFD-induced oxidative stress was corrected by adiponectin. Gene array analysis implicated several antioxidant enzymes, including Gpxs, Prdx, Sod, and Nox4, in mediating this effect. Adiponectin also attenuated palmitate-induced reactive oxygen species production in cultured myotubes and improved insulin-stimulated glucose uptake in primary muscle cells. Increased LC3-II and decreased p62 expression suggested that HFD induced autophagy in muscle of WT mice; however, these changes were not observed in Ad-KO mice. Replenishing adiponectin in Ad-KO mice increased LC3-II and Beclin1 and decreased p62 protein levels, induced fibroblast growth factor-21 expression, and corrected HFD-induced decreases in LC3, Beclin1, and ULK1 gene expression. In vitro studies examining changes in phospho-ULK1 (Ser555), LC3-II, and lysosomal enzyme activity confirmed that adiponectin directly induced autophagic flux in cultured muscle cells in an AMPK-dependent manner. We overexpressed an inactive mutant of Atg5 to create an autophagy-deficient cell model, and together with pharmacological inhibition of autophagy, demonstrated reduced insulin sensitivity under these conditions. In summary, adiponectin stimulated

  1. Adiponectin is essential for lipid homeostasis and survival under insulin deficiency and promotes β-cell regeneration

    Ye, Risheng; Holland, William L; Gordillo, Ruth; Wang, Miao; Wang, Qiong A; Shao, Mengle; Morley, Thomas S.; Gupta, Rana K.; Stahl, Andreas; Scherer, Philipp E.

    2014-01-01

    eLife digest Fat tissue is essential for health. Fat cells store energy and release it when it is needed; they also release hormones that are important for the health of our heart and for regulating our metabolism. One of these hormones, adiponectin, helps cells to remove fat molecules from the bloodstream. This allows the body to maintain appropriate cholesterol levels and prevents fatty build-ups from blocking blood vessels, which is associated with heart disease. Adiponectin also helps cel...

  2. A Comparative Study on the Expression, Purification and Functional Characterization of Human Adiponectin in Pichia pastoris and Escherichia coli

    Hussin A. Rothan

    2012-03-01

    Full Text Available Adiponectin is one of the most bioactive substances secreted by adipose tissue and is involved in the protection against metabolic syndrome, artherosclerosis and type II diabetes. Research into the use of adiponectin as a promising drug for metabolic syndromes requires production of this hormone in high quantities considering its molecular isoforms. The objective of this study is to produce recombinant human adiponectin by Pichia pastoris (P-ADP as a cheap and convenient eukaryotic expression system for potential application in pharmaceutical therapy. For comparison, adiponectin was also expressed using the Escherichia coli (E-ADP expression system. Adiponectin was constructed by overlap-extension PCR, and cloned in standard cloning vector and hosts. Recombinant expression vectors were cloned in the P. pastoris and E. coli host strains, respectively. SDS-PAGE and western blotting were used to detect and analyse expressed recombinant protein in both systems. Adiponectin was purified by affinity chromatography and quantified using the Bradford Assay. The results of this study indicated that P-ADP quantity (0.111 mg/mL was higher than that of E-ADP (0.04 mg/mL and both were produced in soluble form. However, P-ADP was able to form high molecular weights of adiponectin molecules, whilst E-ADP was not able to form isoforms higher than trimer. In addition, P-ADP was more active in lowering blood glucose compared with E-ADP. The two types of proteins were equally efficient and significantly decreased blood triglyceride and increased high density lipoprotein. We conclude that P. pastoris is able to produce high quantity of bioactive adiponectin for potential use in treatment of metabolic syndromes.

  3. Essential roles of insulin, AMPK signaling and lysyl and prolyl hydroxylases in the biosynthesis and multimerization of adiponectin

    Zhang L, Li M, Corcoran M, Zhang S, Cooper GJS

    2015-01-01

    Post-translational modifications (PTMs) of the adiponectin molecule are essential for its full bioactivity, and defects in PTMs leading to its defective production and multimerization have been linked to the mechanisms of insulin resistance, obesity, and type-2 diabetes. Here we observed that, in differentiated 3T3-L1 adipocytes, decreased insulin signaling caused by blocking of insulin receptors (InsR) with an anti-InsR blocking antibody, increased rates of adiponectin secretion, whereas con...

  4. Dietary fish oil did not prevent sleep deprived rats from a reduction in adipose tissue adiponectin gene expression

    Andersen Monica

    2008-11-01

    Full Text Available Abstract Sleep deprivation in humans has been related to weight gain and consequently, increased risk for insulin resistance. In contrast, there is a significant loss of weight in sleep deprived rats suggesting a state of insulin resistance without obesity interference. Thus, we aimed to assess the effects of a rich fish oil dietetic intervention on glucose tolerance, serum insulin and adiponectin, and adipose tissue gene expression of adiponectin and TNF-α of paradoxically sleep deprived (PSD rats. The study was performed in thirty day-old male Wistar randomly assigned into two groups: rats fed with control diet (soybean oil as source of fat and rats fed with a fish oil rich diet. After 45 days of treatment, the animals were submitted to PSD or maintained as home cage control group for 96 h. Body weight and food intake were carefully monitored in all groups. At the end of PSD period, a glucose tolerance test was performed and the total blood and adipose tissues were collected. Serum insulin and adiponectin were analyzed. Adipose tissues were used for RT-PCR to estimate the gene expression of adiponectin and TNF-α. Results showed that although fish oil diet did not exert any effect upon these measurements, PSD induced a reduction in adiponectin gene expression of retroperitoneal adipose tissues, with no change in serum adiponectin concentration or in adiponectin and TNF-α gene expression of epididymal adipose tissue. Thus, the stress induced by sleep deprivation lead to a desbalance of adiponectin gene expression.

  5. ERp46 binds to AdipoR1, but not AdipoR2, and modulates adiponectin signalling

    The pleiotropic effects of the insulin-sensitizing adipokine adiponectin are mediated, at least in part, by two seven-transmembrane domain receptors AdipoR1 and AdipoR2. Recent reports indicate a role for AdipoR-binding proteins, namely APPL1, RACK1 and CK2β, in proximal signal transduction events. Here we demonstrate that endoplasmic reticulum protein 46 (ERp46) interacts specifically with AdipoR1 and provide evidence that ERp46 modulates adiponectin signalling. Co-immunoprecipitation followed by mass spectrometry identified ERp46 as an AdipoR1-, but not AdipoR2-, interacting protein. Analysis of truncated constructs and GST-fusion proteins revealed the interaction was mediated by the cytoplasmic, N-terminal residues (1-70) of AdipoR1. Indirect immunofluorescence microscopy and subcellular fractionation studies demonstrated that ERp46 was present in the ER and the plasma membrane (PM). Transient knockdown of ERp46 increased the levels of AdipoR1, and AdipoR2, at the PM and this correlated with increased adiponectin-stimulated phosphorylation of AMPK. In contrast, adiponectin-stimulated phosphorylation of p38MAPK was reduced following ERp46 knockdown. Collectively these results establish ERp46 as the first AdipoR1-specific interacting protein and suggest a role for ERp46 in adiponectin receptor biology and adiponectin signalling.

  6. Serum Leptin and Adiponectin Levels in Obese and Nonobese Asthmatic School Children in relation to Asthma Control

    Atqah Abdul Wahab

    2013-01-01

    Full Text Available There is growing evidence of a positive correlation between asthma and obesity in children and adults. Leptin and adiponectin regulate several metabolic and inflammatory functions. This study aims to evaluate serum leptin and adiponectin concentrations in asthmatic school children to investigate their association with obesity and the degree of asthma control. Obese asthmatic (OA and nonobese asthmatic (NOA children, aged 7 to 14, were randomly enrolled in this prospective study. Data on demographic, anthropometric, serum lipids, and spirometric measures and allergy status were collected and analyzed. Serum leptin was significantly higher (25.8±11.1 versus 8.7±11.1; P<0.0001 and adiponectin levels were lower (2.5±1.2 versus 5.4±2.9; P<0.0001 in OA compared to NOA children. The uncontrolled group had higher leptin and lower adiponectin levels compared to well and partially controlled asthma. BMI was positively correlated with leptin (r=0.79; P<0.001 and negatively with adiponectin (r=-0.73; P<0.001. Mean BMI and leptin levels were observed to be higher in girls compared to boys. Stepwise multiple linear regression analysis showed that higher BMI and female gender had significant effect on serum leptin levels. Among asthmatic children higher serum leptin and lower adiponectin levels were significantly associated with obesity and showed no significant association with degree of asthma controls.

  7. Gender differences in the association of visceral and subcutaneous adiposity with adiponectin in African Americans: the Jackson Heart Study

    Bidulescu Aurelian

    2013-02-01

    Full Text Available Abstract Background Adiponectin, paradoxically reduced in obesity and with lower levels in African Americans (AA, modulates several cardiometabolic risk factors. Because abdominal visceral adipose tissue (VAT, known to be reduced in AA, and subcutaneous adipose tissue (SAT compartments may confer differential metabolic risk profiles, we investigated the associations of VAT and SAT with serum adiponectin, separately by gender, with the hypothesis that VAT is more strongly inversely associated with adiponectin than SAT. Methods Participants from the Jackson Heart Study, an ongoing cohort of AA (n = 2,799; 64% women; mean age, 55 ± 11 years underwent computer tomography assessment of SAT and VAT volumes, and had stored serum specimens analyzed for adiponectin levels. These levels were examined by gender in relation to increments of VAT and SAT. Results Compared to women, men had significantly lower mean levels of adiponectin (3.9 ± 3.0 μg/mL vs. 6.0 ± 4.4 μg/mL; p 3 vs. 2,668 ± 968 cm3; p 3 vs. 801 ± 363 cm3; p  Conclusion In African Americans, abdominal visceral adipose tissue had an inverse association with serum adiponectin concentrations only among women. Abdominal subcutaneous adipose tissue appeared as a protective fat depot in men.

  8. ERp46 binds to AdipoR1, but not AdipoR2, and modulates adiponectin signalling

    Charlton, Hayley K.; Webster, Julie; Kruger, Sarah; Simpson, Fiona; Richards, Ayanthi A. [Diamantina Institute for Cancer, Immunology and Metabolic Medicine, University of Queensland, Princess Alexandra Hospital, Brisbane, QLD 4102 (Australia); Whitehead, Jonathan P., E-mail: j.whitehead1@uq.edu.au [Diamantina Institute for Cancer, Immunology and Metabolic Medicine, University of Queensland, Princess Alexandra Hospital, Brisbane, QLD 4102 (Australia)

    2010-02-05

    The pleiotropic effects of the insulin-sensitizing adipokine adiponectin are mediated, at least in part, by two seven-transmembrane domain receptors AdipoR1 and AdipoR2. Recent reports indicate a role for AdipoR-binding proteins, namely APPL1, RACK1 and CK2{beta}, in proximal signal transduction events. Here we demonstrate that endoplasmic reticulum protein 46 (ERp46) interacts specifically with AdipoR1 and provide evidence that ERp46 modulates adiponectin signalling. Co-immunoprecipitation followed by mass spectrometry identified ERp46 as an AdipoR1-, but not AdipoR2-, interacting protein. Analysis of truncated constructs and GST-fusion proteins revealed the interaction was mediated by the cytoplasmic, N-terminal residues (1-70) of AdipoR1. Indirect immunofluorescence microscopy and subcellular fractionation studies demonstrated that ERp46 was present in the ER and the plasma membrane (PM). Transient knockdown of ERp46 increased the levels of AdipoR1, and AdipoR2, at the PM and this correlated with increased adiponectin-stimulated phosphorylation of AMPK. In contrast, adiponectin-stimulated phosphorylation of p38MAPK was reduced following ERp46 knockdown. Collectively these results establish ERp46 as the first AdipoR1-specific interacting protein and suggest a role for ERp46 in adiponectin receptor biology and adiponectin signalling.

  9. A meta-analysis of adiponectin gene rs22411766 T>G polymorphism and ischemic stroke susceptibility

    Xiuju Chen

    2016-04-01

    Full Text Available Several studies have investigated the correlation between adiponectin gene rs22411766 T>G polymorphism and ischemic stroke risk. However, the results were not conclusive with each other. Therefore, to overcome this obstacle, we performed this meta-analysis to further explicate the adiponectin gene rs22411766 T>G polymorphism and ischemic stroke susceptibility. Case-control or cohort studies focused on adiponectin gene rs22411766 T>G polymorphism and ischemic stroke risk were electronic searched in the databases of Medline, Pubmed, Cochrane library, Excerpta Medica database(EMBASE and China National Knowledge Infrastructure (CNKI. All the potentially relevant studies were included in this meta-analysis. The association between adiponectin gene rs22411766 T>G polymorphism and ischemic stroke was expressed by odds ratio with its confidence interval. Publication bias has been assessed by begg’s funnel plot. All the analyses have been performed by Revman 5.1 statistical software. Finally, a total of six studies with 1,345 cases and 1,421 controls were included in this meta-analysis. Our results demonstrated that there was a significant association between adiponectin gene rs22411766 T>G polymorphism and ischemic stroke risk (p<0.05. People with G single nucleotide of adiponectin gene have the increased risk of developing ischemic stroke compared to T single nucleotide.

  10. Importance of the high-molecular-mass isoform of adiponectin in improved insulin sensitivity with rosiglitazone treatment in HIV disease.

    Qurashi, Saima; Mynarcik, Dennis C; McNurlan, Margaret A; Ahn, Hongshik; Ferris, Robert; Gelato, Marie C

    2008-09-01

    The present study was designed to investigate the relationship of isoforms of adiponectin to insulin sensitivity in subjects with HIV-associated insulin resistance in response to treatment with the thiazolidinedione, rosiglitazone. The two isoforms of adiponectin, HMW (high-molecular-mass) and LMW (low-molecular-mass), were separated by sucrose-gradient-density centrifugation. The amount of adiponectin in gradient fractions was determined by ELISA. Peripheral insulin sensitivity (Rd) was determined with hyperinsulinaemic-euglycaemic clamp, whereas hepatic sensitivity [HOMA (Homoeostasis Model Assessment) %S] was based on basal glucose and insulin values. Treatment with rosiglitazone for 3 months resulted in a significant improvement in the index of hepatic insulin sensitivity (86.4+/-15% compared with 139+/-23; P=0.007) as well as peripheral insulin sensitivity (4.04+/-0.23 compared with 6.17+/-0.66 mg of glucose/kg of lean body mass per min; P<0.001). Improvement in HOMA was associated with increased levels of HMW adiponectin (r=0.541, P=0.045), but not LMW adiponectin. The present study suggests that the HMW isoform of adiponectin is important in the regulation of rosiglitazone-mediated improvement in insulin sensitivity in individuals with HIV-associated insulin resistance, particularly in the liver. PMID:18254722

  11. Serum adiponectin predicts all-cause mortality and end stage renal disease in patients with type I diabetes and diabetic nephropathy

    Jorsal, A.; Tarnow, L.; Frystyk, J.;

    2008-01-01

    Adiponectin levels are increased in patients with type I diabetes especially in the presence of microangiopathy. Here we determined the predictive value of serum adiponectin levels and 8 adiponectin gene polymorphisms for mortality, cardiovascular events and end-stage renal disease in type I......, age and duration of diabetes. Cox regression analysis of 373 patients showed a covariate-adjusted hazard ratio for all-cause mortality of 1.46 for a change of one standard deviation in log10 of serum adiponectin. There was no association with cardiovascular events; however, serum adiponectin levels...... predicted end stage renal disease in a covariate-adjusted analysis. Two of eight gene polymorphisms, found in the 878 patients, were associated with increased serum adiponectin levels but none of the polymorphisms were associated with a renal or cardiovascular outcome. These studies show that high serum...

  12. The Effects of Combined Adiponectin-Metformin on Glucose and Lipids Levels in Mice and Acute Toxicity and Anti-Ulcerogenic Activity of Adiponectin Against Ethanol-Induced Gastric Mucosal Injuries in Rat

    Mohammed A. Alshawsh

    2011-11-01

    Full Text Available Adiponectin is a protein hormone secreted entirely by abdominal fat tissue. It exhibits various biological activities. The present study was performed to evaluate the effects of metformin alone or in combination with adiponectin on blood glucose, TG (triglyceride, CHOL (Total cholesterol, LDL (Low density lipoprotein and HDL (High density lipoprotein levels in mice and also to evaluate the anti-ulcerogenic activity of adiponectin against ethanol induced gastric mucosal injury in rats. Three groups of mice were gavaged with 1% volume/body weight high fat-sucrose. Metformin at a dosage of 250 mg/kg was added to the feed and a dosage of 2.5 mg/kg adiponectin was injected intraperitoneally (i.p. Blood glucose was measured at one hour intervals for five hours. Blood concentrations of TG, CHOL, LDL and HDL were also measured at the end of the fifth hour of the experiment. On the other hand, four groups of adult healthy rats were i.p. injected with distilled water, omeprazole 20 mg/kg, 2.5 mg/kg and 5 mg/kg adiponectin one hour before oral administration of absolute ethanol to generate gastric mucosal injury. After an additional hour the rats were sacrificed and the ulcer areas of the gastric walls were determined. Furthermore, an acute toxicity study has indicated no mortality with 5 mg/kg dose of adiponectin injected i.p in rats and no major clinical signs of toxicity were observed. The results indicate that the effect of a combination of metformin and adiponectin on blood glucose and HDL is quite effective. Histology of the gastric wall of negative control rats revealed severe damage of gastric mucosa, along with edema and leucocyte infiltration of the submucosal layer compared to rats pre-treated with either omeprazole or adiponectin extract where there was marked gastric protection along with reduction or inhibition of edema and leucocytes infiltration. The results suggest that combination of metfomin and adiponectin give a promising antidiabetic

  13. Integral Role of PTP1B in Adiponectin-Mediated Inhibition of Oncogenic Actions of Leptin in Breast Carcinogenesis1 2

    Taliaferro-Smith, Latonia; Nagalingam, Arumugam; Knight, Brandi Brandon; Oberlick, Elaine; Saxena, Neeraj K; Sharma, Dipali

    2013-01-01

    The molecular effects of obesity are mediated by alterations in the levels of adipocytokines. High leptin level associated with obese state is a major cause of breast cancer progression and metastasis, whereas adiponectin is considered a “guardian angel adipocytokine” for its protective role against various obesity-related pathogenesis including breast cancer. In the present study, investigating the role of adiponectin as a potential inhibitor of leptin, we show that adiponectin treatment inh...

  14. Serum Adiponectin and Glomerular Filtration Rate in Patients with Type 2 Diabetes

    Ortega Moreno, Lorena; Lamacchia, Olga; Copetti, Massimiliano; Salvemini, Lucia; De Bonis, Concetta; De Cosmo, Salvatore; Cignarelli, Mauro; Trischitta, Vincenzo; Menzaghi, Claudia

    2015-01-01

    High serum adiponectin has been increased in several conditions of kidney disease. Only sparse and conflicting results have been reported in patients with type 2 diabetes (T2D), a subgroup of individuals who are at high risk for renal dysfunction. The aim of this study was to fill up this gap of knowledge by investigating such association in a large sample of Italian diabetic patients. The association between serum adiponectin levels and estimated glomerular filtration rate (eGFR by Chronic Kidney Disease-Epidemiology Collaboration CKD-EPI equation) was investigated in 1,243 patients with T2D from two cross-sectional Italian studies: 878 from San Giovanni Rotondo (SGR) and 365 from Foggia (FG). Serum adiponectin was inversely associated with eGFR in SGR [β (standard error, SE) for 1 standard deviation (SD) of adiponectin = -3.26 (0.64)] and in FG [β(SE)=-5.70(1.28)] sample, as well as in the two studies combined [β(SE)=-3.99(0.59)];(p<0.0001 for all). In this combined analysis, the association was still significant after adjusting for sex, smoking habits, body mass index (BMI), waist circumference, diabetes duration, glycated hemoglobin (HbA1c), albumin creatinine ratio (ACR) and anti-hyperglycemic, anti-hypertensive and anti-dyslipidemic treatments [β (SE)= -2.19 (0.59), p = 0.0001]. A stronger association between each SD adiponectin increment and low eGFR was observed among patients with micro-/macro-albuminuria, as compared to those with normo-albuminuria [adjusted β(SE)=-4.42(1.16) ml/min/1.73m2 vs. -1.50 (0.67) ml/min/1.73m2, respectively; p for adiponectin-by-albuminuric status = 0.022]. For each adiponectin SD increment, the odds of having eGFR < 60 ml/min/1.73m2 increased by 41% (odds ratio, OR = 1.41; 95% confidence interval, CI 1.21–1.64) in SGR sample, 53% (OR = 1.53; 95% CI 1.21–1.94) in FG sample, and 44% (OR = 1.44; 95%CI 1.27–1.64) in the two studies considered together (p<0.0001 for all). In the combined sample, further adjustment for the

  15. Leptin, not adiponectin, predicts hypertension in the Copenhagen City Heart Study

    Asferg, Camilla Lundegaard; Møgelvang, Rasmus; Flyvbjerg, Allan;

    2010-01-01

    BACKGROUND: Leptin and adiponectin are hormones secreted by adipose tissue, and both hormones are candidate intermediaries between adipose tissue and overweight-related diseases. So far, no prospective study has been published where the independent effects of these two hormones on the development...... of hypertension have been directly compared. The objective of this study was to investigate the relationships between plasma levels of leptin and adiponectin and new-onset hypertension in the Copenhagen City Heart Study (CCHS). METHODS: In a prospective study design, we examined new......, or diastolic blood pressure (DBP) > or = 90 mm Hg, or use of antihypertensive medication. Using logistic regression analysis, adjusting for age, sex, estimated glomerular filtration rate, triglycerides, high-density lipoprotein cholesterol (HDL-C), fibrinogen, and glucose, and with leptin and...

  16. Feeding a Modified Fish Diet to Bottlenose Dolphins Leads to an Increase in Serum Adiponectin and Sphingolipids

    Sobolesky, Philip M.; Harrell, Tyler S.; Parry, Celeste; Venn-Watson, Stephanie; Janech, Michael G.

    2016-01-01

    Feeding a modified fish diet has been suggested to improve insulin sensitivity in bottlenose dolphins; however, insulin sensitivity was not directly measured. Since demonstrating an improvement in insulin sensitivity is technically difficult in dolphins, we postulated that directional changes in the hormone axis: fibroblast growth factor 21 (FGF21)/Adiponectin/Ceramide (Cer), could provide further support to this hypothesis. We measured 2-h post-prandial serum FGF21, total adiponectin, percent unmodified adiponectin, ceramide, and sphingosine levels from dolphins fed a diet rich in heptadecanoic acid (C17:0) over 24 weeks. Serum FGF21 was quantified by ELISA with an observed range of 129–1599 pg/ml, but did not significantly change over the 24-week study period. Total adiponectin levels (mean ± SD) significantly increased from 776 ± 400 pmol/ml at week 0 to 1196 ± 467 pmol/ml at week 24. The percent unmodified adiponectin levels (mean ± SD) decreased from 23.8 ± 6.0% at week 0 to 15.2 ± 5.2% at week 24. Interestingly, although FGF21 levels did not change, there was a good correlation between FGF21 and total adiponectin (ρ = 0.788, P < 0.001). We quantified the abundances of serum ceramides and sphingosines (SPH) because adiponectin has a defined role in sphingolipid metabolism through adiponectin receptor-mediated activation of ceramidases. The most abundant ceramide in dolphin sera was Cer 24:1 comprising 49% of the ceramides measured. Significant reductions were observed in the unsaturated Cer 18:1, Cer 20:1, and Cer 24:1, whereas significant increases were observed in saturated Cer 22:0, Cer 24:0, and Cer 26:0. However, total serum ceramides did not change. Significant elevations were detected for total sphingosine, dihydrosphingosine, sphingosine-1-phosphate, and dihydrosphingosine-1-phosphate. Proteomic analysis of the serum proteins revealed few changes in serum proteins over the study period. In conclusion

  17. Adiponectin-induced secretion of interleukin-6 (IL-6, monocyte chemotactic protein-1 (MCP-1, CCL2 and interleukin-8 (IL-8, CXCL8 is impaired in monocytes from patients with type I diabetes

    Maier Kevin

    2006-08-01

    Full Text Available Abstract Background Systemic adiponectin is reduced in patients with cardiovascular disease (CVD and low adiponectin may contribute to the pathogenesis of atherosclerosis. However, circulating adiponectin is elevated in type 1 diabetes (T1D patients, who have also a higher incidence to develop CVD. Because monocytes play an important role in atherosclerosis, we analysed the influence of adiponectin on cytokine and chemokine release in monocytes from T1D patients and controls. Methods Systemic adiponectin was determined in the plasma and the high-molecular weight (HMW form of adiponectin was analysed by immunoblot. Monocytes were isolated from T1D patients and controls and the adiponectin-stimulated release of interleukin-6 (IL-6, monocyte chemotactic protein-1 (MCP-1, CCL2 and interleukin-8 (IL-8, CXCL8 was analysed. Results Systemic adiponectin was higher in T1D patients. Immunoblot analysis of the plasma indicate abundance of HMW adiponectin in T1D patients and controls. IL-6, CCL2 and CXCL8 secretion in response to adiponectin were found induced in monocytes from controls whereas only IL-6 was upregulated in T1D cells. The induction of IL-6 by adiponectin was abrogated by an inhibitor of the NFκB pathway. Conclusion These data indicate that adiponectin-mediated induction of IL-6, CCL2 and CXCL8 is disturbed in monocytes from T1D patients and therefore elevated systemic adiponectin in T1D patients may be less protective when compared to controls.

  18. Physical exercise-induced hippocampal neurogenesis and antidepressant effects are mediated by the adipocyte hormone adiponectin

    Yau, Suk Yu; Li, Ang; Hoo, Ruby L. C.; Ching, Yick Pang; Christie, Brian R.; Tatia M C Lee; Xu, Aimin; So, Kwok-Fai

    2014-01-01

    Adiponectin (ADN) is an adipocyte-secreted protein with insulin-sensitizing, antidiabetic, antiinflammatory, and antiatherogenic properties. Evidence is also accumulating that ADN has neuroprotective activities, yet the underlying mechanism remains elusive. Here we show that ADN could pass through the blood-brain barrier, and elevating its levels in the brain increased cell proliferation and decreased depression-like behaviors. ADN deficiency did not reduce the basal hippocampal neurogenesis ...

  19. Adiponectin Inhibits Insulin Function in Primary Trophoblasts by PPARα-Mediated Ceramide Synthesis

    Aye, Irving L M H; Gao, Xiaoli; Weintraub, Susan T.; Jansson, Thomas; Powell, Theresa L.

    2014-01-01

    Maternal adiponectin (ADN) levels are inversely correlated with birth weight, and ADN infusion in pregnant mice down-regulates placental nutrient transporters and decreases fetal growth. In contrast to the insulin-sensitizing effects in adipose tissue and muscle, ADN inhibits insulin signaling in the placenta. However, the molecular mechanisms involved are unknown. We hypothesized that ADN inhibits insulin signaling and insulin-stimulated amino acid transport in primary human trophoblasts by ...

  20. Genetische und metabolische Regulation von Adiponectin : Resultate von in vitro und humanen in vivo Studien

    Wegewitz, Uta Elke

    2008-01-01

    Übergewicht, Diabetes oder Fettstoffwechselstörungen sind mit erniedrigten Adiponectinspiegeln assoziiert. Eine Modulation des Adiponectins kann durch genetische und metabolische Gegebenheiten erfolgen. Das Ziel dieser Arbeit war die Analyse von Faktoren, welche die Adiponectinspiegel beeinflussen können, sowie eine Charakterisierung der Oligomerverteilung unter verschiedenen metabolischen Bedingungen. In der MeSyBePo-Kohorte waren die zirkulierenden Adiponectinspiegel mit den Promotorpolymor...

  1. The Relationship among Smoking, Plasma Adiponectin, Leptin, Inflammatory Markers and Insulin Resistance

    We aimed to study how smoking influences the relationship between fat mass ,soluble tumor necrosis factor-α, (TNF?) receptors 1 and 2 (sTNFR1 and sTNFR2),highly sensitive C-reactive protein(hs-CRP), adiponectin, leptin and insulin resistance.A total of 60 healthy men (age: 27-53 years, body mass index (BMI): 20-35 kg/m2), 30 of whom were never-smokers and 30 smokers, matched for age, BMI and waist-to-hip ratio were included in this study. Those were subdivided into insulin resistant (IR) and insulin sensitive (IS) subgroups. Measures included circulating soluble fractions of the tumor necrosis factor α (TNF α) receptors (sTNFR1 and sTNFR2) and their relationship to fat mass, fasting plasma adiponectin, leptin, hs- CRP and insulin sensitivity index.Smokers had significantly lower fat mass, lower fasting glucose, insulin and leptin concentrations than nonsmokers. Despite lower fat mass, insulin and leptin, smokers showed significantly increased circulating sTNFR2 levels (3.7±0.8 vs. 2.9 ±0.8 ng/ml, π=0.03). Being either a smoker or having insulin resistance was independently associated with lower adiponectin concentrations (π = 0.046 and 0.001, respectively). No difference was detected in average hs- CRP concentrations between smokers and nonsmokers (π = 0.18) and between IR and IS subjects (π = 0.13).Both fat mass and smoking are related to increased activity of the TNFα axis. Plasma adiponectin concentrations are lower in smokers and IR subjects. These two mechanisms could be associated with increased cardiovascular risk in smokers

  2. The Relationship among Smoking, Plasma Adiponectin, Leptin, Inflammatory Markers and Insulin Resistance

    The study aimed to investigate how smoking influences the relationship between fat mass, soluble tumor necrosis factor-α , (TNFα ) receptors 1 and 2 (sTNFR1 and sTNFR2), highly sensitive C-reactive protein (hs-CRP), adiponectin, leptin and insulin resistance. A total of 60 healthy men (age: 27-53 years, body mass index (BMI): 20-35 kg/m2), 30 of whom were never-smokers and 30 smokers, matched for age, BMI and waist-to-hip ratio were included in this study. Those were subdivided into insulin resistant (IR) and insulin sensitive (IS) subgroups. Measures included circulating soluble fractions of the tumor necrosis factor α (TNFα ) receptors (sTNFR1 and sTNFR2) and their relationship to fat mass, fasting plasma adiponectin, leptin, hs-CRP and insulin sensitivity index. Smokers had significantly lower fat mass, lower fasting glucose, insulin and leptin concentrations than nonsmokers. Despite lower fat mass, insulin and leptin, smokers showed significantly increased circulating sTNFR2 levels (3.7±0.8 vs. 2.9±0.8 ng/ml, P=0.03). Being either a smoker or having insulin resistance was independently associated with lower adiponectin concentrations (P = 0.046 and 0.001, respectively). No difference was detected in average hs- CRP concentrations between smokers and nonsmokers (P = 0.18) and between IR and IS subjects (P = 0.13).Both fat mass and smoking are related to increased activity of the TNFα axis. Plasma adiponectin concentrations are lower in smokers and IR subjects. These two mechanisms could be associated with increased cardiovascular risk in smokers

  3. Assessment of High Molecular Weight Adiponectin and Interleukin-6 in Metabolic Syndrome

    Delia Lupu; Dumitraşcu, Dan L.

    2014-01-01

    Background. Subclinical inflammation can represent a risk factor associated with the metabolic syndrome. Measurement of systemic inflammatory markers can improve early diagnosis in this disease. In the last decade different biomarkers have been suggested for the evaluation of inflammation in metabolic syndrome: high-sensitive C-reactive protein, leptin, tumor necrosis factor-alpha, total adiponectin.Aim. The aim of this study was to investigate a possible relationship between high molecular w...

  4. Metabolic Implications of Surgical Fat Removal: Increase of Adiponectin Plasma Levels After Reduction Mammaplasty and Abdominoplasty.

    Vinci, Valeriano; Valaperta, Serenella; Klinger, Marco; Montanelli, Alessandro; Specchia, Claudia; Forcellini, Davide; Maione, Luca; Klinger, Francesco Maria; Caviggioli, Fabio

    2016-06-01

    Recent studies tried to identify new indicators of risk in the development of insulin resistance, cardiovascular disease, and metabolic syndrome; recently, breast size has been proposed as a new measure of risk for type 2 diabetes mellitus in women. To understand the role of breast adipose tissue and subcutaneous adipose tissue in lipidic and glucose metabolism, we decided to evaluate the variation on levels of adiponectin in plasma and other well-known metabolic markers before and after surgical fat reduction.We formed 2 groups: breast reduction group (M-) and abdominoplasty group (ADD). For all patients enrolled in the study, we recorded anthropometric measurements 1 hour before surgery (that we considered as time zero). At time zero, we always performed a blood sample to observe the assay of glucose, total cholesterol, HDL cholesterol, LDL cholesterol, triglycerides, CRP, TNF-α, IL-1, IL-6, and adiponectin. The dosage of the above parameters was repeated 40 days after the surgical intervention with the aim of assessing whether they showed a statistically significant change after surgery.Adiponectin levels increased significantly in both groups of patients after surgery: in patients undergoing reduction mammaplasty and abdominoplasty, the mean increase was equal to 1.68 (P = 0.007) and 4.28 (P = 0.019), respectively. The variation in increase was not statistically different between the 2 groups (P = 0.254).Moreover, in the M- group, we observed that HDL levels increased and glycemia decreased significantly.Our study shows that reduction mammaplasty is a surgical procedure associated with a significant improvement in adiponectin level, HDL cholesterol level, and a significant decrease in glycemia level.The effective correlation between the role of breast adipose tissue and appearance of disease is still to be determined. PMID:25003417

  5. Association between nutritional status, C-reactive protein, adiponectin and HOMA-AD in Brazilian children

    Ana Luiza Gomes Domingos

    2014-07-01

    Full Text Available Introduction: In children, the presence of obesity is a major risk factor for the occurrence of cardiovascular diseases on the adulthood. Objective: To evaluate the association of anthropometry, body composition, clinical variables and biochemical profile with C-reactive protein and adiponectin levels, and insulin resistance in children in the municipality of Nova Era, Brazil. Methods: Nested case-control study following a crosssectional study. We evaluated 178 children, 57 of them classified as obese and 121 as normal-weight from a population of 1024 schoolchildren 6 to 10 years old: Blood samples were collected after 12-hour fast to obtain serum and plasma. We collected anthropometric and body composition measures, systolic and diastolic blood pressure data. Sexual maturation was assessed according to the stage of sexual development. We performed Student's t-test, Mann-Whitney U test, Pearson's correlation, Spearman's test and multiple linear regression analysis. Independent variables with p < 0.05 were included in the multiple regression model. Residual analysis was performed to assess model validity. Results: Among obese children, C-reactive protein levels were associated with triacylglycerol levels and body fat percentage estimated by skinfold thickness (R²adjusted = 27.6%, p < 0.001. Adiponectin was associated with HOMA-IR, HOMA-AD and body fat percentage estimated by skinfold thickness (R²adjusted = 75.5%, p < 0.001. HOMA-AD index was associated with HOMA-IR, adiponectin, systolic blood pressure and weight (R²adjusted = 90.7%, p < 0.001. Conclusion: Significant associations were found between body composition, anthropometry, clinical variables, biochemical profile and adiponectin and C-reactive protein levels and insulin resistance in obese and normal-weight children.

  6. Effect of strength training on serum levels of adiponectin, testosterone, and cortisol in sedentary lean men

    Fatah Moradi

    2013-08-01

    Conclusion: Performing a period of strength training can improve body weight, body mass index, and cardio respiratory function of sedentary lean men, while it results in no significant change in body fat percent. Also, since testosterone has anti-diabetic role, strength training can be useful through increasing testosterone levels in sedentary lean men. It doesn’t appear that twelve weeks strength training has effect on circulating levels of adiponectin and cortisol in sedentary lean men.

  7. Common genetic variation in adiponectin, leptin, and leptin receptor and association with breast cancer subtypes

    Nyante, Sarah J.; Gammon, Marilie D.; Jay S. Kaufman; Bensen, Jeannette T.; Lin, Dan Yu; Barnholtz-Sloan, Jill S.; Hu, Yijuan; He, Qianchuan; Luo, Jingchun; Millikan, Robert C.

    2011-01-01

    Adipocytokines are produced by visceral fat, and levels may be associated with breast cancer risk. We investigated whether single nucleotide polymorphisms (SNPs) in adipocytokine genes adiponectin (ADIPOQ), leptin (LEP), and the leptin receptor (LEPR) were associated with basal-like or luminal A breast cancer subtypes. 104 candidate and tag SNPs were genotyped in 1776 of 2022 controls and 1972 (200 basal-like, 679 luminal A) of 2311 cases from the Carolina Breast Cancer Study (CBCS), a popula...

  8. Local induction of adiponectin reduces lipopolysaccharide-triggered skeletal muscle damage

    Jortay, Julie; Senou, Maximin; Delaigle, Aurélie; Noel, Laurence; Funahashi, Tohru; Maeda, Norikazu; Many, Marie-Christine; Brichard, Sonia

    2010-01-01

    Adiponectin (ApN) exhibits metabolic and antiinflammatory properties. This hormone is exclusively secreted by adipocytes under normal conditions. We have shown that ApN was induced in tibialis anterior muscle of mice injected with lipopolysaccharide (LPS) and in C2C12 myotubes cultured with proinflammatory cytokines. We hypothesized that muscle ApN could be a local protective mechanism to counteract excessive inflammatory reaction and oxidative damage. To test this paradigm, we examined wheth...

  9. Similar to adiponectin, serum levels of osteoprotegerin are associated with obesity in healthy subjects.

    Ashley, David T

    2011-07-01

    An increase in serum osteoprotegerin (OPG) is associated with type 2 diabetes mellitus, the severity of vascular calcification, and coronary artery disease. Obesity is a risk factor for diabetes and cardiovascular disease, but little is known about the relationship between OPG and obesity. The purpose of this study was to determine if changes in body mass index (BMI) and insulin sensitivity influence circulating OPG in healthy subjects. A total of 100 subjects (36 lean, 41 overweight, and 23 obese) with normal glucose tolerance, blood pressure, and electrocardiogram stress test result volunteered for this study. Insulin sensitivity was estimated using a 2-hour oral glucose tolerance test with oral glucose insulin sensitivity analysis. Osteoprotegerin, tumor necrosis factor-related apoptosis-inducing ligand (TRAIL),soluble receptor activator of nuclear factor-κβ ligand (sRANKL), and adiponectin were analyzed using commercially available enzyme-linked immunosorbent assays. Osteoprotegerin (P < .01) and adiponectin (P < .001) were significantly decreased in the obese compared with lean subjects. There was no significant difference between BMI categories for TRAIL or sRANKL. Controlling for age and sex, there was a significant correlation between OPG and adiponectin (r = 0.391, P < .001), BMI (r = -0.331, P < .001), waist circumference (r = -0.268, P < .01), homeostasis model assessment of insulin resistance (r = -0.222, P < .05), and oral glucose insulin sensitivity (r = 0.221, P < .05). Both OPG and adiponectin were negatively correlated with body weight, BMI, waist circumference, and fasting plasma insulin while being positively correlated with insulin sensitivity (P < .05). Controlling for age, sex, and BMI, TRAIL was positively related to fat mass (r = 0.373, P < .001) and waist circumference (r = 0.257, P < .05). In contrast to patients with type 2 diabetes mellitus, circulating OPG is lower in obese, but otherwise healthy subjects and is positively correlated

  10. Decreased levels of plasma adiponectin associated with increased risk of colorectal cancer

    Sayaka; Otake; Hiroaki; Takeda; Shoichiro; Fujishima; Tadahisa; Fukui; Tomohiko; Orii; Takeshi; Sato; Yu; Sasaki; Shoichi; Nishise; Sumio; Kawata

    2010-01-01

    AIM:To investigate the association between adiponectin levels and risk of colorectal adenoma and cancer (early and advanced).METHODS: A cross-sectional study in a cohort of hospital-based patients was conducted between January 2004 and March 2006 at Yamagata University Hospital. Male subjects, who had colorectal tumors detected by endoscopic examination, were enrolled according to inclusion and exclusion criteria. Based on the T factor of the TNM system, intraepithelial carcinoma and submucosally invasive c...

  11. Influence of Exercise on Leptin, Adiponectin and Quality of Life in Type 2 Diabetics

    Nesrin Doğan Dede; Süleyman Hilmi İpekci; Levent Kebapcılar; Mihriban Arslan; Sevil Kurban; Mustafa Yıldız; Mustafa Sait Gönen

    2015-01-01

    Purpose: This study aimed to investigate the influence of aerobic exercise on the quality of life and leptin and adiponectin levels in patients with type 2 diabetes mellitus. Material and Method: Patients were randomized into two groups: aerobic exercise-training and control group. Parameters were assessed at baseline and end of the twelve-week follow-up for 60 type 2 diabetic patients who completed the program. The 36-item Short Form Health Survey was administered to the patients. Resu...

  12. Ethnic differences in leptin and adiponectin levels between Greenlandic Inuit and Danish children

    Munch-Andersen, Thor; Sorensen, Kaspar; Aachmann-Andersen, Niels-Jacob;

    2013-01-01

    Objective. In a recent study, we found that Greenlandic Inuit children had a more adverse metabolic profile than Danish children. Aerobic fitness and adiposity could only partly account for the differences. Therefore, we set out to evaluate and compare plasma leptin and adiponectin levels in Danish...... living Inuit girls [5,131 (6,444–4,085)] (p=0.052). Plasma adiponectin was higher for both Danish boys [22,359 (2,573–19,428)] [ng/mL unadjusted geometric mean (95% CI)] and girls [26,609 (28,994–24,420)] compared to southern living Inuit boys [15,306 (18,406–12,728)] and girls [18,864 (22......,640–15,717)] (both p<0.001), respectively. All differences remained after adjustment for body fat percentage (BF%), aerobic fitness, age and puberty. The leptin/adiponectin ratio was higher in Danish boys and tended to be higher in Danish girls compared to northern living Inuit boys and girls, respectively. These...

  13. Lifestyle-induced decrease in fat mass improves adiponectin secretion in obese adults

    Kelly, Karen R; Navaneethan, Sankar D; Solomon, Thomas;

    2014-01-01

    either a low-glycemic index diet (∼40 U) plus exercise (LoGIX) or a high-glycemic index diet (∼80 U) diet plus exercise (HiGIX) on plasma leptin and adiponectin (total and high molecular weight [HMW]) in 27 older obese adults (age = 65 ± 0.5 yr, body mass index = 34.5 ± 0.7 kg·m). METHODS: Insulin...... sensitivity was calculated from an oral glucose tolerance test. Fasting HMW adiponectin and leptin were quantified from plasma samples obtained before the insulin sensitivity index obtained from the oral glucose tolerance test. Glucose and insulin measures were obtained before and every 30 min during the test...... = 19.2 ± 4.5; HiGIX: preintervention = 27.9 ± 4.2, postintervention = 11.9 ± 2.2 ng·mL; P = 0.004), and HMW adiponectin was significantly increased (LoGIX: preintervention = 1606.9 ± 34.6, postintervention = 3502.3 ± 57; HiGIX: preintervention = 3704.8 ± 38.1, postintervention = 4284.3 ± 52.8 pg·mL; P...

  14. Adiponectin and AMP kinase activator stimulate proliferation, differentiation, and mineralization of osteoblastic MC3T3-E1 cells

    Yamauchi Mika

    2007-11-01

    Full Text Available Abstract Background Adiponectin is a key mediator of the metabolic syndrome that is caused by visceral fat accumulation. Adiponectin and its receptors are known to be expressed in osteoblasts, but their actions with regard to bone metabolism are still unclear. In this study, we investigated the effects of adiponectin on the proliferation, differentiation, and mineralization of osteoblastic MC3T3-E1 cells. Results Adiponectin receptor type 1 (AdipoR1 mRNA was detected in the cells by RT-PCR. The adenosine monophosphate-activated protein kinase (AMP kinase was phosphorylated by both adiponectin and a pharmacological AMP kinase activator, 5-amino-imidazole-4-carboxamide-riboside (AICAR, in the cells. AdipoR1 small interfering RNA (siRNA transfection potently knocked down the receptor mRNA, and the effect of this knockdown persisted for as long as 10 days after the transfection. The transfected cells showed decreased expressions of type I collagen and osteocalcin mRNA, as determined by real-time PCR, and reduced ALP activity and mineralization, as determined by von Kossa and Alizarin red stainings. In contrast, AMP kinase activation by AICAR (0.01–0.5 mM in wild-type MC3T3-E1 cells augmented their proliferation, differentiation, and mineralization. BrdU assay showed that the addition of adiponectin (0.01–1.0 μg/ml also promoted their proliferation. Osterix, but not Runx-2, appeared to be involved in these processes because AdipoR1 siRNA transfection and AICAR treatments suppressed and enhanced osterix mRNA expression, respectively. Conclusion Taken together, this study suggests that adiponectin stimulates the proliferation, differentiation, and mineralization of osteoblasts via the AdipoR1 and AMP kinase signaling pathways in autocrine and/or paracrine fashions.

  15. Circulating levels of adiponectin, resistin, and visfatin after mud-bath therapy in patients with bilateral knee osteoarthritis

    Fioravanti, Antonella; Giannitti, Chiara; Cheleschi, Sara; Simpatico, Antonella; Pascarelli, Nicola Antonio; Galeazzi, Mauro

    2015-11-01

    Adipocytokines, including adiponectin, resistin, and visfatin may play an important role in the pathophysiology of osteoarthritis (OA). Spa therapy is one of the most commonly used non-pharmacological approaches for OA, but its mechanisms of action are not completely known. The aim of the present study was to assess whether a cycle of mud-bath therapy (MBT) influences the serum levels of adiponectin, resistin, and visfatin in patients with knee OA. As part of a prospective randomized, single blind-controlled trial evaluating the efficacy of MBT in knee OA, we included in this study 95 outpatients. One group ( n = 49) received a cycle of MBT at the spa center of Chianciano Terme (Italy) in addition to the usual treatment, and one group (control group; n = 46) continued their regular care routine alone. Patients were assessed at basal time and at the end of the study (15 days) for clinical and biochemical parameters. Clinical assessments included spontaneous pain on a visual analog scale (VAS) score and the Western Ontario and McMaster Universities index (WOMAC) subscores for knee OA evaluated as total pain score (W-TPS), total stiffness score (W-TSS), and total physical function score (W-TPFS). Adiponectin, resistin and visfatin serum levels were assessed by enzyme immunoassay methods. At the end of the mud-bath therapy, serum adiponectin levels showed a significant decrease ( p adiponectin and resistin but not the circulating levels of visfatin. In view of the recent evidences about the involvement of adiponectin and resistin in the pathogenesis and progression of OA, the decrease of these adipokines after mud-bath therapy may play a protective role in the course of the disease. However, it remains to be clarified which of the mechanisms of action of MBT may have determined the changes in serum levels of adiponectin and resistin that we observed.

  16. Chlorogenic acid improves late diabetes through adiponectin receptor signaling pathways in db/db mice.

    Shasha Jin

    Full Text Available The aim of this study was to examine the effects of chlorogenic acid (CGA on glucose and lipid metabolism in late diabetic db/db mice, as well as on adiponectin receptors and their signaling molecules, to provide evidence for CGA in the prevention of type 2 diabetes. We randomly divided 16 female db/db mice into db/db-CGA and db/db-control (CON groups equally; db/m mice were used as control mice. The mice in both the db/db-CGA and db/m-CGA groups were administered 80 mg/kg/d CGA by lavage for 12 weeks, whereas the mice in both CON groups were given equal volumes of phosphate-buffered saline (PBS by lavage. At the end of the intervention, we assessed body fat and the parameters of glucose and lipid metabolism in the plasma, liver and skeletal muscle tissues as well as the levels of aldose reductase (AR and transforming growth factor-β1 (TGF-β1 in the kidneys and measured adiponectin receptors and the protein expression of their signaling molecules in liver and muscle tissues. After 12 weeks of intervention, compared with the db/db-CON group, the percentage of body fat, fasting plasma glucose (FPG and glycosylated hemoglobin (HbA1c in the db/db-CGA group were all significantly decreased; TGF-β1 protein expression and AR activity in the kidney were both decreased; and the adiponectin level in visceral adipose was increased. The protein expression of adiponectin receptors (ADPNRs, the phosphorylation of AMP-activated protein kinase (AMPK in the liver and muscle, and the mRNA and protein levels of peroxisome proliferator-activated receptor alpha (PPAR-α in the liver were all significantly greater. CGA could lower the levels of fasting plasma glucose and HbA1c during late diabetes and improve kidney fibrosis to some extent through the modulation of adiponectin receptor signaling pathways in db/db mice.

  17. Adiponectin promotes VEGF-C-dependent lymphangiogenesis by inhibiting miR-27b through a CaMKII/AMPK/p38 signaling pathway in human chondrosarcoma cells.

    Huang, Chun-Yin; Chang, An-Chen; Chen, Hsien-Te; Wang, Shih-Wei; Lo, Yuan-Shun; Tang, Chih-Hsin

    2016-09-01

    Chondrosarcoma is the second most frequently occurring type of bone malignancy characterized by distant metastatic propensity. Vascular endothelial growth factor-C (VEGF-C) is the major lymphangiogenic factor, and makes crucial contributions to tumour lymphangiogenesis and lymphatic metastasis. Adiponectin is a protein hormone secreted predominantly by differentiated adipocytes. In recent years, adiponectin has also been indicated as facilitating tumorigenesis, angiogenesis and metastasis. However, the effect of adiponectin on VEGF-C regulation and lymphangiogenesis in chondrosarcoma has remained largely a mystery. In the present study, we have shown a clinical correlation between adiponectin and VEGF-C, as well as tumour stage, in human chondrosarcoma tissues. We further demonstrated that adiponectin promoted VEGF-C expression and secretion in human chondrosarcoma cells. The conditioned medium from adiponectin-treated cells significantly induced tube formation and migration of human lymphatic endothelial cells. In addition, adiponectin knock down inhibited lymphangiogenesis in vitro and in vivo We also found that adiponectin-induced VEGF-C is mediated by the calmodulin-dependent protein kinase II (CaMKII), AMP-activated protein kinase (AMPK) and p38 signaling pathway. Furthermore, the expression of miR-27b was negatively regulated by adiponectin via the CaMKII, AMPK and p38 cascade. The present study is the first to describe the mechanism of adiponectin-promoted lymphangiogenesis by up-regulating VEGF-C expression in chondrosarcomas. Thus, adiponectin could serve as a therapeutic target in chondrosarcoma metastasis and lymphangiogenesis. PMID:27252405

  18. Adiponectin and its receptors in the ovary: further evidence for a link between obesity and hyperandrogenism in polycystic ovary syndrome.

    Fabio V Comim

    Full Text Available Polycystic ovary syndrome (PCOS, characterized by ovarian androgen excess, is the commonest endocrine disorder in women. Obesity increases androgen synthesis, a phenomenon attributed to the accompanying hyperinsulinemia. Our hypothesis was that adipokines, fat cell-derived hormones, play a direct role in modulating ovarian androgen secretion. Therefore, the aims of this study were to explore the effects of adipokines (in particular, adiponectin on ovarian steroidogenesis and compare the expression of adiponectin receptors in ovaries from women with and without PCO. Sections of archived human ovaries (nine from women with normal ovaries and 16 with PCOS, classified histologically, with reference to menstrual history and ultrasound were analysed by quantitative morphometry and the proportion of positive-labelling cells compared. In addition, studies of androgen production in relation to adipokine function in primary bovine theca cell culture were also performed. A significantly lower proportion of theca cells expressed adiponectin receptors 1 and 2 (AdipoR1, AdipoR2 in polycystic ovaries than in normal ovaries. In cultured theca cells, adiponectin suppressed androstenedione production and gene expression of LH receptor and key enzymes in the androgen synthesis pathway. Moreover, knockdown of genes for AdipoR1 and AdipoR2 was associated with increased androstenedione secretion by bovine theca cells. These results provide evidence for a direct link between fat cell metabolism and ovarian steroidogenesis, suggesting that disruption of adiponectin and/or its receptors plays a key role in pathogenesis of hyperandrogenism in PCOS.

  19. The effects of acute exercise on serum adiponectin and resistin levels and their relation to insulin sensitivity in overweight males.

    Jamurtas, A Z; Theocharis, V; Koukoulis, G; Stakias, N; Fatouros, I G; Kouretas, D; Koutedakis, Y

    2006-05-01

    The purpose of this study was to investigate the effects of a submaximal aerobic exercise bout on adiponectin and resistin levels as well as insulin sensitivity, until 48 h post-exercise in healthy overweight males. Nine subjects performed an exercise bout at an intensity corresponding to approximately 65% of their maximal oxygen consumption for 45 min. Adiponectin, resistin, cortisol, insulin, glucose and insulin sensitivity were measured prior to exercise, immediately after exercise as well as 24 and 48 h after exercise. Data were analyzed using repeated measures ANOVA while Pearson's correlations were performed to identify possible relationship among the assessed variables. There were no significant differences for adiponectin (microg ml(-1)) [pre, 3.61(0.73); post, 3.15(0.43); 24 h, 3.15(0.81); 48 h, 3.37(0.76)] or resistin (ng ml(-1)) [pre, 0.19(0.03); post, 0.13(0.03); 24 h, 0.23(0.04); 48 h, 0.23(0.03)] across time. Insulin sensitivity increased and insulin concentration decreased significantly only immediately after exercise. Furthermore, no significant correlations were observed among the variables assessed except for the expected between insulin level and insulin sensitivity. These results indicate that a submaximal aerobic workout does not result in significant changes in adiponectin and resistin up to 48 h post-exercise. Furthermore, it appears that adiponectin or resistin is not associated with insulin sensitivity. PMID:16525810

  20. Mendelian randomization studies do not support a causal role for reduced circulating adiponectin levels in insulin resistance and type 2 diabetes

    H. Yaghootkar (Hanieh); C. Lamina (Claudia); R.A. Scott (Robert); Z. Dastani (Zari); M.F. Hivert; L.L. Warren (Liling); A. Stancáková (Alena); S.G. Buxbaum (Sarah); L.-P. Lyytikäinen; P. Henneman (Peter); Y. Wu (Ying); C.Y.Y. Cheung (Chloe); J.S. Pankow (James); A.U. Jackson (Anne); S. Gustafsson (Stefan); J.H. Zhao (Jing); C. Ballantyne (Christie); W. Xie (Weijia); R.N. Bergman (Richard); M. Boehnke (Michael); F. El Bouazzaoui (Fatiha); F.S. Collins (Francis); S.H. Dunn (Sandra); J. Dupuis (Josée); N.G. Forouhi (Nita); C.J. Gillson (Christopher); A.T. Hattersley (Andrew); J. Hong (Jaeyoung); M. Kähönen (Mika); J. Kuusisto (Johanna); L. Kedenko (Lyudmyla); F. Kronenberg (Florian); A. Doria (Andrea); T.L. Assimes (Themistocles); E. Ferrannini (Ele); T. Hansen (Torben); K. Hao (Ke); H. Häring (Hans); J.W. Knowles (Joshua); C.M. Lindgren (Cecilia); J.J. Nolan (John); J. Paananen (Jussi); O. Pedersen (Oluf); T. Quertermous (Thomas); U. Smith (Ulf); T. Lehtimäki (Terho); C.-T. Liu (Ching-Ti); R.J.F. Loos (Ruth); M.I. McCarthy (Mark); A.D. Morris (Andrew); R.S. Vasan (Ramachandran Srini); T.D. Spector (Timothy); T.M. Teslovich (Tanya); J. Tuomilehto (Jaakko); J.A.P. Willems van Dijk (Ko); J. Viikari (Jorma); N. Zhu (Na); C. Langenberg (Claudia); E. Ingelsson (Erik); R.K. Semple (Robert); A. Sinaiko (Alan); C.N.A. Palmer (Colin); M. Walker (Mark); K.S.L. Lam (Karen); B. Paulweber (Bernhard); K.L. Mohlke (Karen); C.M. van Duijn (Cock); O. Raitakari (Olli); A. Bidulescu (Aurelian); N.J. Wareham (Nick); M. Laakso (Markku); D. Waterworth (Dawn); D.A. Lawlor (Debbie); J.B. Meigs (James); J.B. Richards (J. Brent); T.M. Frayling (Timothy)

    2013-01-01

    textabstractAdiponectin is strongly inversely associated with insulin resistance and type 2 diabetes, but its causal role remains controversial. We used a Mendelian randomization approach to test the hypothesis that adiponectin causally influences insulin resistance and type 2 diabetes. We used gene

  1. Adiponectin concentration is associated with muscle insulin sensitivity, AMPK phosphorylation and ceramide content in skeletal muslce of men, but not women

    Høeg, Louise Dalgas; Sjøberg, Kim Anker; Lundsgaard, Anne-Marie;

    2013-01-01

    Adiponectin is an adipokine that regulates metabolism and increases insulin sensitivity. Mechanisms behind this insulin sensitizing effect have been investigated in rodents, but little is known in humans especially in skeletal muscle. Women have higher serum concentrations of adiponectin than men...

  2. Total and high-molecular weight adiponectin and risk of colorectal cancer : the European Prospective Investigation into Cancer and Nutrition Study

    Aleksandrova, Krasimira; Boeing, Heiner; Jenab, Mazda; Bueno-de-Mesquita, H. Bas; Jansen, Eugene; van Duijnhoven, Franzel J. B.; Fedirko, Veronika; Rinaldi, Sabina; Romieu, Isabelle; Riboli, Elio; Romaguera, Dora; Westphal, Sabine; Overvad, Kim; Tjonneland, Anne; Boutron-Ruault, Marie Christine; Clavel-Chapelon, Francoise; Kaaks, Rudolf; Lukanova, Annekatrin; Trichopoulou, Antonia; Lagiou, Pagona; Trichopoulos, Dimitrios; Agnoli, Claudia; Mattiello, Amalia; Saieva, Calogero; Vineis, Paolo; Tumino, Rosario; Peeters, Petra H.; Argueelles, Marcial; Bonet, Catalina; Sanchez, Maria-Jose; Dorronsoro, Miren; Huerta, Jose-Maria; Barricarte, Aurelio; Palmqvist, Richard; Hallmans, Goran; Khaw, Kay-Tee; Wareham, Nick; Allen, Naomi E.; Crowe, Francesca L.; Pischon, Tobias

    2012-01-01

    Adiponectin an adipose tissue-derived protein may provide a molecular link between obesity and colorectal cancer (CRC), but evidence from large prospective studies is limited. In particular, no epidemiological study explored high-molecular weight (HMW) and non-HMW adiponectin fractions in relation t

  3. 循环脂联素:肝细胞癌的一种潜在预后指标%Circulating adiponectin: a potential prognostic marker for hepatocellular carcinoma

    Mohamed E. E. Shams; Mohammed M. H. Al-Gayyar; Enaase A. M. E. Barakat; Mohamed A. Ebrahim; Mamdouh M. El-Shishtawy

    2011-01-01

    Objective: We planned this study to investigate the relation between serum adiponectin level and hepatocel-lular carcinoma (HCC): risk, features and prognosis. Methods: The study included 100 patients with HCC and 40 healthy control subjects. Adiponectin levels were determined by an enzyme-linked immunosorbent assay kit. Results: In the subset of patients with compensated cirrhosis, the mean serum adiponectin level was significantly lower in HCC cases compared to healthy controls (88.6 versus 115 ng/mL; P = 0.012). In addition, serum adiponectin levels correlated negatively with tumor size (P = 0.004) and were significantly lower in patients with vascular invasion and distant metastases (P = 0.03 and P = 0.02 respectively). Furthermore, the median overall survival was significantly higher in the high adiponectin group than the low adiponectin group (median 12.5 versus 9.5 months; log rank = 4.6, P = 0.03). Conclusion: Decreased circulating adiponectin level may play a role in the development of HCC and is a potential poor prognostic marker. These data should be validated in further prospective studies. Also the mechanisms by which adiponectin affect the course of HCC need to be clarified.

  4. [Considerations about study on the underlying mechanism of acu-moxibustion in the treatment of obesity type polycystic ovary syndrome by regulating adiponectin].

    Liao, Yan-Jun; Shi, Yin; Yu, Li-Qing; Fang, Jian-Qiao

    2012-02-01

    Polycystic ovary syndrome (PCOS) is a common reproductive endocrine disease in women of reproductive age, and the obesity and insulin resistance are considered to be the key link in the pathophysiological process of PCOS of obesity type. Adiponectin, a protein hormone, is closely related to insulin resistance and obesity, which has been being researched extensively in recent years. The authors of the present article review the pathogenesis of PCOS of obesity type from the relationship between adiponectin and obesity, and between adiponectin and insulin resistance, separately. In particular, the authors review studies on the underlying mechanism of acupuncture and moxibustion interventions in regulating adiponectin level briefly. The authors think of that acupuncture and moxibustion interventions induced increase of adiponectin level is possibly to improve insulin resistance in obesity and/or PCOS patients, hoping to provide a new target for clinical treatment of PCOS. PMID:22574574

  5. Citrus auraptene acts as an agonist for PPARs and enhances adiponectin production and MCP-1 reduction in 3T3-L1 adipocytes

    Citrus fruit compounds have many health-enhancing effects. In this study, using a luciferase ligand assay system, we showed that citrus auraptene activates peroxisome proliferator-activated receptor (PPAR)-α and PPARγ. Auraptene induced up-regulation of adiponectin expression and increased the ratio of the amount of high-molecular-weight multimers of adiponectin to the total adiponectin. In contrast, auraptene suppressed monocyte chemoattractant protein (MCP)-1 expression in 3T3-L1 adipocytes. Experiments using PPARγ antagonist demonstrated that these effects on regulation of adiponectin and MCP-1 expression were caused by PPARγ activations. The results indicate that auraptene activates PPARγ in adipocytes to control adipocytekines such as adiponectin and MCP-1 and suggest that the consumption of citrus fruits, which contain auraptene can lead to a partial prevention of lipid and glucose metabolism abnormalities

  6. Autocrine and paracrine modulation of microRNA-155 expression by globular adiponectin in RAW 264.7 macrophages: involvement of MAPK/NF-κB pathway.

    Subedi, Amit; Park, Pil-Hoon

    2013-12-01

    Adiponectin, a hormone produced from adipose tissue, regulates various biological responses, including inflammation and many metabolic processes. MicroRNAs control expression of diverse target genes and various physiological responses. Many of these responses are commonly regulated by adiponectin. However, effects of adiponectin on microRNAs regulation are largely unknown. Herein we demonstrated that globular adiponectin induces increase in miR-155 expression, which plays an important role in inflammatory response, in RAW 264.7 macrophages. We further showed that this effect was modulated by and MAPK/NF-κB dependent mechanisms. These results suggest that miR-155 would be a novel promising target mediating adiponectin-induced various biological responses. PMID:24084329

  7. Physical activity, sedentary time, and sleep and the association with inflammatory markers and adiponectin in 8- to 11-year-old Danish children

    Nielsen, Mette Søndergaard; Quist, Jonas Salling; Chaput, Jean-Philippe;

    2016-01-01

    negatively associated with adiponectin in boys and girls (P<0.001) and with CRP and IL-6 in girls (P<0.05) independent of sleep duration, sedentary time, age, fat mass index (FMI), and pubertal status. Sedentary time was positively associated with adiponectin in boys and girls (both P<0.001), and sleep...... duration with adiponectin in boys independent of age, FMI, and pubertal status (P<0.001); however, these associations disappeared after mutual adjustments for movement behavior. Sleep duration variability was positively associated with CRP in girls independent of all covariates (P<0.01). CONCLUSION: MVPA...... remained negatively associated with inflammatory markers and adiponectin, and sleep duration variability positively associated with CRP after adjustment for FMI, pubertal status, and other movement behavior. The inverse association between MVPA and adiponectin conflicts with the anti...

  8. Relationship between serum adiponectin level and ATPase activity of erythrocyte membrance in patients with 2-type diabetes

    Objective: To explore the possible mechanism of development nephrosis as related to changes of serum adiponectin levels and alteration of activities of Na+·K+-ATPase and Ca+2·Mg+2-ATPase of erythrocyte membrance in patients with 2-type diabetes. Methods: Serum adiponectin levels (with RIA) and erythrocyte membrance (prepared with Reilnila method) Na+·K+- ATPase and Ca+2·Mg+2-ATPase activity were determined in 45 DM2 patients without nephropathy, 31 DM2 patients with nephropathy and 30 controls. Results: Serum adiponectin levels in the diabetic patients were significantly lower than those in controls (P+·K+-ATPase and Ca+2·Mg+2-ATPase activities were also significantly lower than those in controls (P+·K+-ATPase and Ca+2·Mg+2-ATPase activities of erythrocyte membrance. (authors)

  9. Thyroid status influence on adiponectin, acylation stimulating protein (ASP and complement C3 in hyperthyroid and hypothyroid subjects

    Zhang Jianhua

    2006-02-01

    Full Text Available Abstract Background Thyroid abnormalities (hyperthyroid and hypothyroid are accompanied by changes in intermediary metabolism including alterations in body weight, insulin resistance and lipid profile. The aims of this study were to examine plasma ASP, its precursor C3 and adiponectin in hyperthyroid and hypothyroid subjects as compared to controls. Methods A total of 99 subjects were recruited from endocrinology/out-patient clinics: 46 hyperthyroid subjects, 23 hypothyroid subjects and 30 control subjects. Subjects were evaluated for FT4, FT3, TSH, glucose, insulin, complete lipid profile and the adipokines: adiponectin, acylation stimulating protein (ASP and complement C3. Results Hyperthyroidism was associated with a 95% increase in adiponectin (p = 0.0002, a 47% decrease in C3 (p Conclusion These changes suggest that thyroid disease may be accompanied by changes in adipokines, which may contribute to the phenotype expressed.

  10. Association of IL-1ra and adiponectin with C-peptide and remission in patients with type 1 diabetes

    Pfleger, C.; Hansen, L.; Herder, C.;

    2008-01-01

    OBJECTIVE: We investigated the association of anti-inflammatory cytokine interleukin (IL)-1 receptor antagonist (IL-1ra), adiponectin, proinflammatory cytokines IL-1 beta, IL-6, and CCL2, and tumor necrosis factor-alpha with beta-cell function, metabolic status, and clinical remission in patients...... association of IL-1 beta with C-peptide after 1 month (P = 0.009). In contrast, anti-inflammatory adiponectin was elevated in patients with poor metabolic control after 6 and 12 months (P < 0.05) and positively correlated with A1C after 1 month (P = 0.0004). Proinflammatory IL-6 was elevated in patients with...... improving beta-cell function in type 2 diabetes, may also be a new therapeutic approach in type 1 diabetes. The relation of adiponectin and IL-6 with remission and metabolic status transfers observations from in vitro and animal models into the human situation in vivo Udgivelsesdato: 2008/4...

  11. Globular adiponectin, acting via AdipoR1/APPL1, protects H9c2 cells from hypoxia/reoxygenation-induced apoptosis.

    Min Park

    Full Text Available Cardiomyocyte apoptosis is an important remodeling event contributing to heart failure and adiponectin may mediate cardioprotective effects at least in part via attenuating apoptosis. Here we used hypoxia-reoxygenation (H/R induced apoptosis in H9c2 cells to examine the effect of adiponectin and cellular mechanisms of action. We first used TUNEL labeling in combination with laser scanning cytometry to demonstrate that adiponectin prevented H/R-induced DNA fragmentation. The anti-apoptotic effect of adiponectin was also verified via attenuation of H/R-induced phosphatidylserine exposure using annexin V binding. H/R-induced apoptosis via the mitochondrial-mediated intrinsic pathway of apoptosis as assessed by cytochrome c release into cytosol and caspase-3 activation, both of which were attenuated by adiponectin. Mechanistically, we demonstrated that adiponectin enhanced anti-oxidative potential in these cells which led to attenuation of the increase in intracellular reactive oxygen species (ROS caused by H/R. To further address the mechanism of adiponctins anti-apoptotic effects we used siRNA to efficiently knockdown adiponectin receptor (AdipoR1 expression and found that this attenuated the protective effects of adiponectin on ROS production and caspase 3 activity. Knockdown of APPL1, an important intracellular binding partner for AdipoR, also significantly reduced the ability of adiponectin to prevent H/R-induced ROS generation and caspase 3 activity. In summary, H/R-induced ROS generation and activation of the intrinsic apoptotic pathway was prevented by adiponectin via AdipoR1/APPL1 signaling and increased anti-oxidant potential.

  12. Roles of adipocyte derived hormone adiponectin and resistin in insulin resistance of type 2 diabetes

    Hui-Ling Lu; Hong-Wei Wang; Yu Wen; Mu-Xun Zhang; Han-Hua Lin

    2006-01-01

    AIM: To detect plasma levels of new adipocyte derived hormone adiponectin and resistin in type 2 diabetes patients and to explore their potential roles in insulin resistance in type 2 diabetes.METHODS: According to the body mass index (BMI),60 type 2 diabetes patients were divided into two groups, one group was non-obese diabetes patients with BMI < 25Kg/M2 (30 cases) and the other group was obese diabetes patients with BMI >25Kg/M2 (30 cases).There were 28 healthy persons in the control group.ELISA technique was employed to determine the plasma adiponectin and resistin concentrations. The fasting blood glucose, insulin and blood lipid were detected respectively by electrocheminescence immunoassay and immunoturbidimetric assay. Insulin resistance index and insulin sensitive index were calculated by the homeostasis model assessment (HOMO).RESULTS: The levels of plasma adiponectin were decreased significantly in diabetes group compared to that in control group (non-obese: 8.58±0.86, obese: 6.22±1.34 vs 10.53±1.47 P<0.05); moreover, adiponectin concentration in obese diabetes group was significantly decreased compared to that in non-obese diabetes group (6.22±1.34 vs 8.58±0.86, P<0.05). The levels of plasma resistin were increased significantly in diabetes group compared to that in control group (obese: 18.64 ± 4.65, non-obese: 24.05±9.07 vs 14.16±5.25, P<0.05,P< 0.05); furthermore, the levels of resistin in obese diabetes group were increased significantly compared to that in non-obese diabetes group (P<0.05). Plasma adiponectin was correlated negatively with BMI, blood glucose, insulin resistance index and triglyceride (respectively, r=-0.55, P<0.01; r=-0.51, P<0.05; r=-0.52,P<0.05; r=-0.39, P<0.05), while it was positively correlated with insulin sensitive index (r=0.45, P< 0.05).Conversely, plasma resistin correlated positively with BMI, blood glucose, triglyceride and insulin resistance index (respectively, r=0.40, P<0.05; r=0

  13. Hypoxia dysregulates the production of adiponectin and plasminogen activator inhibitor-1 independent of reactive oxygen species in adipocytes

    Low plasma levels of adiponectin (hypoadiponectinemia) and elevated circulating concentrations of plasminogen activator inhibitor (PAI)-1 are causally associated with obesity-related insulin resistance and cardiovascular disease. However, the mechanism that mediates the aberrant production of these two adipokines in obesity remains poorly understood. In this study, we investigated the effects of hypoxia and reactive oxygen species (ROS) on production of adiponectin and PAI-1 in 3T3-L1 adipocytes. Quantitative PCR and immunoassays showed that ambient hypoxia markedly suppressed adiponectin mRNA expression and its protein secretion, and increased PAI-1 production in mature adipocytes. Dimethyloxallyl glycine, a stabilizer of hypoxia-inducible factor 1α (HIF-1α), mimicked the hypoxia-mediated modulations of these two adipokines. Hypoxia caused a modest elevation of ROS in adipocytes. However, ablation of intracellular ROS by antioxidants failed to alleviate hypoxia-induced aberrant production of adiponectin and PAI-1. On the other hand, the antioxidants could reverse hydrogen peroxide (H2O2)-induced dysregulation of adiponectin and PAI-1 production. H2O2 treatment decreased the expression levels of peroxisome proliferator-activated receptor gamma (PPARγ) and CCAAT/enhancer binding protein (C/EBPα), but had no effect on HIF-1α, whereas hypoxia stabilized HIF-1α and decreased expression of C/EBPα, but not PPARγ. Taken together, these data suggest that hypoxia and ROS decrease adiponectin production and augment PAI-1 expression in adipocytes via distinct signaling pathways. These effects may contribute to hypoadiponectinemia and elevated PAI-1 levels in obesity, type 2 diabetes, and cardiovascular diseases

  14. Tumor necrosis factor-α impairs adiponectin signalling, mitochondrial biogenesis, and myogenesis in primary human myotubes cultures.

    Sente, Tahnee; Van Berendoncks, An M; Fransen, Erik; Vrints, Christiaan J; Hoymans, Vicky Y

    2016-05-01

    Skeletal muscle metabolic changes are common in patients with chronic heart failure (HF). Previously, we demonstrated a functional skeletal muscle adiponectin resistance in HF patients with reduced left ventricular ejection fraction (HFrEF). We aimed to examine the impact of adiponectin receptor 1 (AdipoR1) deficiency and TNF-α treatment on adiponectin signaling, proliferative capacity, myogenic differentiation, and mitochondrial biogenesis in primary human skeletal muscle cells. Primary cultures of myoblasts and myotubes were initiated from the musculus vastus lateralis of 10 HFrEF patients (left ventricular ejection fraction; 31.30 ± 2.89%) and 10 age- and gender-matched healthy controls. Healthy control cultures were transfected with siAdipoR1 and/or exposed to TNF-α (10 ng/ml; 72 h). Primary cultures from HFrEF patients preserved the features of adiponectin resistance in vivo. AdipoR1 mRNA was negatively correlated with time to reach maximal cell index (r = -0.7319, P = 0.003). SiRNA-mediated AdipoR1 silencing reduced pAMPK (P mitochondrial (FOXO3, P = 0.018) metabolism, impaired myogenesis (MyoD1, P = 0.053; myogenin, P = 0.048) and polarized cytokine secretion toward a growth-promoting phenotype (IL-10, IL-1β, IFN-γ, P < 0.05 for all; Meso Scale Discovery Technology). Major features of adiponectin resistance are retained in primary cultures from the skeletal muscle of HFrEF patients. In addition, our results suggest that an increased inflammatory constitution contributes to adiponectin resistance and confers alterations in skeletal muscle differentiation, growth, and function. PMID:26921438

  15. Additive regulation of adiponectin expression by the mediterranean diet olive oil components oleic Acid and hydroxytyrosol in human adipocytes.

    Egeria Scoditti

    Full Text Available Adiponectin, an adipocyte-derived insulin-sensitizing and anti-inflammatory hormone, is suppressed in obesity through mechanisms involving chronic inflammation and oxidative stress. Olive oil consumption is associated with beneficial cardiometabolic actions, with possible contributions from the antioxidant phenol hydroxytyrosol (HT and the monounsaturated fatty acid oleic acid (OA, 18:1n-9 cis, both possessing anti-inflammatory and vasculo-protective properties. We determined the effects of HT and OA, alone and in combination, on adiponectin expression in human and murine adipocytes under pro-inflammatory conditions induced by the cytokine tumor necrosis factor(TNF-α. We used human Simpson-Golabi-Behmel syndrome (SGBS adipocytes and murine 3T3-L1 adipocytes as cell model systems, and pretreated them with 1-100 μmol/L OA, 0.1-20 μmol/L HT or OA plus HT combination before stimulation with 10 ng/mL TNF-α. OA or HT significantly (P<0.05 prevented TNF-α-induced suppression of total adiponectin secretion (by 42% compared with TNF-α alone as well as mRNA levels (by 30% compared with TNF-α alone. HT and OA also prevented-by 35%-TNF-α-induced downregulation of peroxisome proliferator-activated receptor PPARγ. Co-treatment with HT and OA restored adiponectin and PPARγ expression in an additive manner compared with single treatments. Exploring the activation of JNK, which is crucial for both adiponectin and PPARγ suppression by TNF-α, we found that HT and OA additively attenuated TNF-α-stimulated JNK phosphorylation (up to 55% inhibition. In conclusion, the virgin olive oil components OA and HT, at nutritionally relevant concentrations, have additive effects in preventing adiponectin downregulation in inflamed adipocytes through an attenuation of JNK-mediated PPARγ suppression.

  16. Association of ADIPOQ gene variants with body weight, type 2 diabetes and serum adiponectin concentrations: the Finnish Diabetes Prevention Study

    Venojärvi Mika

    2011-01-01

    Full Text Available Abstract Background Adiponectin, secreted mainly by mature adipocytes, is a protein with insulin-sensitising and anti-atherogenic effects. Human adiponectin is encoded by the ADIPOQ gene on the chromosomal locus 3q27. Variations in ADIPOQ are associated with obesity, type 2 diabetes (T2DM and related phenotypes in several populations. Our aim was to study the association of the ADIPOQ variations with body weight, serum adiponectin concentrations and conversion to T2DM in overweight subjects with impaired glucose tolerance. Moreover, we investigated whether ADIPOQ gene variants modify the effect of lifestyle changes on these traits. Methods Participants in the Finnish Diabetes Prevention Study were randomly assigned to a lifestyle intervention group or a control group. Those whose DNA was available (n = 507 were genotyped for ten ADIPOQ single nucleotide polymorphisms (SNPs. Associations between SNPs and baseline body weight and serum adiponectin concentrations were analysed using the univariate analysis of variance. The 4-year longitudinal weight data were analysed using linear mixed models analysis and the change in serum adiponectin from baseline to year four was analysed using Kruskal-Wallis test. In addition, the association of SNPs with the risk of developing T2DM during the follow-up of 0-11 (mean 6.34 years was analysed by Cox regression analysis. Results rs266729, rs16861205, rs1501299, rs3821799 and rs6773957 associated significantly (p Conclusions These results from the Finnish Diabetes Prevention Study support the concept that genetic variation in ADIPOQ locus contributes to variation in body size and serum adiponectin concentrations and may also modify the risk of developing T2DM. Trial registration number ClinicalTrials.gov NCT00518167

  17. Changes in genioglossus and their association with serum adiponectin levels in rats subjected to chronic intermittent hypoxia

    ZHANG Xiao-feng; WANG Ya-hui; LI Qin; ZHANG Xi-long; SHEN Jiu-cheng; LI Chong; LIU Hao

    2010-01-01

    Background The genioglossus (GG) is involved in the maintenance of an open airway for effective breathing.Although the pathogenesis of obstructive sleep apnea hypopnea syndrome (OSAHS) was closely associated with GG dysfunction,its causes and possible treatment have not been elucidated.The aim of the study was to investigate the effects of chronic intermittent hypoxia (CIH) on serum adiponectin levels, electromyograph (EMG) activity and ultrastructure of GG, as well as the effect of an adiponectin supplement in anesthetized rats.Methods Forty-two healthy male Wistar rats were randomly divided into normal control (A), CIH (B) and adiponectin treatment (C) groups, 14 rats in each group.CIH was performed eight hours per day for five weeks in both groups B and C.Group C received transvenous injection of adiponectin at the dosage of 10 μg per injection, twice a week for five weeks.At the end of the 5th week the GG EMG voltage was measured and compared among the three groups.Transmission electron microscope was used to observe the ultrastructure of the GG.Results CIH caused significant hypoadiponectinemia, weakened activity of GG EMG at both baseline and hypoxia stimulation, and induced ultrastructural pathological changes, such as, myofibril discontinuities, lysis of myofilament,edema of mitochondria and disruption of cristae, vacuolus and lysis of some mitochondria.Venous supplement of adiponectin improved the above pathological changes resulting from CIH.Conclusion CIH resulted in pathological changes in GG's EMG and ultrastructure, which could be improved by supplement of adiponectin and be associated with hypoadiponectinemia caused by ClH.

  18. Profile of leptin, adiponectin, and body fat in patients with hyperprolactinemia: Response to treatment with cabergoline

    Nazir Ahmad Pala

    2016-01-01

    Full Text Available Introduction: Though hypoadiponectinemia and leptin resistance have been proposed as potential factors for weight gain in patients with hyperprolactinemia (HPL, the effects of HPL and cabergoline on these adipocyte-derived hormones are not clear. Aims of this study were (i to assess the alterations of body fat, leptin, and adiponectin in patients with HPL (ii effect of cabergoline treatment on these parameters. Methods: Nineteen consecutive patients with prolactinoma (median prolactin [PRL] 118.6 (interquartile range: 105.3 μg/L and 20 controls were studied in a nonrandomized matched prospective design. The controls were age, gender, and body mass index (BMI matched. Anthropometric data, metabolic variables, leptin, and adiponectin were studied at baseline and 3 and 6 months after cabergoline treatment. Results: Patients with prolactinoma had increased level of fasting plasma glucose (P < 0.001 as compared to age-, gender-, and BMI-matched healthy controls. Estradiol concentration of controls was higher than that of patients (P = 0.018. Patients with prolactinoma had higher levels of leptin (P = 0.027 as compared to healthy controls without a significant difference in adiponectin levels. There was a significant decrease of body weight at 3 months (P = 0.029, with a further decline at 6 months (P < 0.001 of cabergoline therapy. Furthermore, there was a significant decrement of BMI (P < 0.001, waist circumference (P = 0.003, waist-hip ratio (P = 0.03, total body fat (P = 0.003, plasma glucose (P < 0.001, leptin levels (P = 0.013, and an increase in estradiol concentration (P = 0.03 at 6 months of cabergoline treatment. Conclusion: Patients with prolactinoma have adverse metabolic profile compared to matched controls. Normalization of PRL with cabergoline corrects all the metabolic abnormalities.

  19. Adiponectin gene polymorphism is selectively associated with the concomitant presence of metabolic syndrome and essential hypertension.

    Hsin-Bang Leu

    Full Text Available OBJECTIVE: Cardiovascular risk increases with the presence of both metabolic syndrome (MetS and hypertension (HTN. Although the adiponectin (ADIPOQ gene has been reported to be involved in MetS, its association with HTN remained undetermined. This study aimed to investigate the association of ADIPOQ gene with the phenotypes of HTN and MetS. METHODS: A total of 962 participants from 302 families from the Taiwan young-onset hypertension genetic study were enrolled. Plasma adiponectin were measured, and association analysis was conducted by using GEE regression-based method. Another study, of 1448 unrelated participants, was conducted to replicate the association between ADIPOQ gene and variable phenotypes of MetS with or without HTN. RESULTS: Among 962 subjects from family samples, the lowest plasma adiponectin value was observed in MetS with HTN component (9.3±0.47 µg/ml compared with hypertensives (13.4±0.74 µg /ml or MetS without HTN (11.9±0.60 µg/ml, P<0.05. The SNP rs1501299 (G276T in ADIPOQ gene was found associated with the presence of HTN in MetS (odds ratio for GG+GT vs. TT = 2.46; 95% CI: 1.14-5.3, p = 0.02, but not rs2241766 (T45G. No association of ADIPOQ gene with HTN alone or MetS without HTN was observed. The significant association of the SNP rs1501299 (G276T with the phenotype of presence of HTN in MetS was confirmed (odds ratio for GG+GT vs. TT = 2.15; 95% CI: 1.1-4.3 in the replication study. CONCLUSIONS: ADIPOQ genetic variants were selectively and specifically associated with the concomitant presence of MetS and HTN, suggesting potential genetic linkage between MetS and HTN.

  20. The effects of prolonged fasting on the levels of adiponectin, leptin, apelin, and omentin in pregnant women.

    Kiyak Caglayan, Emel; Engin-Ustun, Yaprak; Sari, Nagihan; Gocmen, Ayşe Yesim; Polat, M Fevzi

    2016-05-01

    The aim of the present study was to evaluate serum adiponectin, leptin, apelin and omentin levels to explore metabolic changes occurring during fasting in the month of Ramadan. The study was designed as a prospective study. The patients were divided into two groups, each comprising 20 patients: Group I, fasting pregnant women, and Group II, non-fasting pregnant women. The patients' age, parity, gestational week and body mass index were recorded. Adiponectin and omentin levels were significantly lower in fasting pregnant women (p fast during 24-38 weeks' gestation should be informed about insulin resistance. PMID:26759187

  1. Globular adiponectin controls insulin-mediated vasoreactivity in muscle through AMPKα2

    de Boer, Michiel P; Meijer, Rick I; Richter, Erik;

    2016-01-01

    -activated protein kinase (AMPK), specifically its α2 subunit, and studied the mechanisms involved. In healthy volunteers, we found that decreased plasma gAdn levels in obese subjects associate with insulin resistance and reduced capillary perfusion during hyperinsulinemia. In cultured human microvascular......Decreased tissue perfusion increases the risk of developing insulin resistance and cardiovascular disease in obesity, and decreased levels of globular adiponectin (gAdn) have been proposed to contribute to this risk. We hypothesized that gAdn controls insulin's vasoactive effects through AMP...

  2. Application of adiponectin, TNF-α and ferrtin in type 2 diabetes with intrahepatic lipid infiltration

    The aim of this study was to find and establish the serum marker which can reflect the degree of intrahepatic lipid infiltration in Type 2 diabetes patients and assess the therapeutic effect. It helps us to observe the improvement of intrahepatic lipid deposit under controlled serum glucose metabolism. Twenty-three Type 2 diabetes patients with obvious intrahepatic lipid infiltration diagnosed by CT scan were divided into two groups, one group took rosiglitazone orally (male: female 5:6), and the combined treatment group took rosiglitazone and metformin simultaneously (male: female 6:6), in daily therapeutic dose of 4 mg rosiglitazone and 2 g metformin for 24 weeks. Before and after treatment, we measured fasting serum glucose, glycated hemoglobin (GHb), insulin, insulin resistant index, plasma adiponectin, leptin, tumor necrotic factor α (TNF-α), ferrtin respectively. After the treatment, fasting serum glucose and GHb decreased obvious, especially the combined treatment group. Intrahepatic lipid content percent decreased, too, in both groups (the rosiglitazone group: 43.3±25.8 vs 29.1±18.7, P<0.01, the combined group: 43.4±21.8 vs 22.0±16.7, P<0.01). Plasma adiponectin and TNF-α had correlation to intrahepatic lipid contend percent change. Plasma adiponectin and TNF-α was obviously improved in the rosiglitazone group and the combined treatment group (Adiponectin: 11.96±7.3 vs 20.61±12.0 ng/mL, 12.76±6.7 vs 25.81±12.8 ng/mL; TNFα: 6.92±2.5 vs 5.89±1.9 pg/mL, 6.81±2.14 vs 5.45±2.0 pg/mL; P<0.01). In addition, serum ferrtin concentration decreased obviously, especially the combined treatment group (rosiglitazone group: 345±116 vs 288±71ng/mL, P<0.05, combined treatment group: 362±194 vs 258±109 ng/mL, P<0.01). It can be concluded that 1) rosiglitazone and metformin controls serum glucose metabolism and improves intrahepatic lipid infiltration by especially the combined treatment, 2) plasma adiponectic and TNF-α are effective markers to reflect

  3. Adiponectin deficiency: a model of pulmonary hypertension associated with pulmonary vascular disease

    Summer, Ross; Fiack, Christopher A.; Ikeda, Yasumasa; Sato, Kaori; Dwyer, Daniel; Ouchi, Noriyuki; Fine, Alan; Farber, Harrison W.; Walsh, Kenneth

    2009-01-01

    Adiponectin (APN) is an adipocyte-derived factor that exists at high concentrations in serum and has anti-inflammatory and systemic vascular-protective properties. In this study, we investigated the role of APN in pulmonary vascular homeostasis. We found that APN localizes to the luminal side of blood vessels in lung and acts in vitro to block TNF-α-induced E-selectin upregulation in pulmonary artery endothelial cells. Targeted deletion of the APN gene in mice leads to a vascular phenotype in...

  4. Adiponectin and its association with insulin resistance and type 2 diabetes

    Tianxin Sheng; Kangjuan Yang

    2008-01-01

    Adiponectin is an adipokine, which is expressed in adipose tissue and is thought to play an important role in glucose metabolism. Hypoadiponectinemia can cause reduction of fatty acid oxidation, decreased glucose uptake in skeletal muscle cells, and increased gluconeogenesis in hepatic cells. The level of plasma glucose can be increased. On the other hand, the decrease of fatty acid oxidation increases the level of free fatty acid (FFA), which increases the insulin resistance, and then decreases the glucose uptake, which ultimately causes increased plasma glucose and type 2 diabetes (T2D). This review describes the process from hypoadiponectinemia to T2D and the genesis of hypoadiponeetinemia at a molecular level.

  5. Ethnic differences in leptin and adiponectin levels between Greenlandic Inuit and Danish children

    Thor Munch-Andersen

    2013-08-01

    Full Text Available Objective. In a recent study, we found that Greenlandic Inuit children had a more adverse metabolic profile than Danish children. Aerobic fitness and adiposity could only partly account for the differences. Therefore, we set out to evaluate and compare plasma leptin and adiponectin levels in Danish and Inuit children. Methods. In total, 187 Inuit and 132 Danish children (5.7–17.1 years had examinations of anthropometrics, body fat content, pubertal staging, fasting blood and aerobic fitness. Results. Plasma leptin was higher in Danish boys [3,774 (4,741–3,005] [pg/mL unadjusted geometric mean (95% CI] compared to both northern [2,076 (2,525–1,706] (p<0.001 and southern (2,515 (3,137–2,016 (p<0.001 living Inuit boys and higher in Danish girls [6,988 (8,353–5,847] compared to southern living Inuit girls [4,910 (6,370–3,785] (p=0.021 and tended to be higher compared to northern living Inuit girls [5,131 (6,444–4,085] (p=0.052. Plasma adiponectin was higher for both Danish boys [22,359 (2,573–19,428] [ng/mL unadjusted geometric mean (95% CI] and girls [26,609 (28,994–24,420] compared to southern living Inuit boys [15,306 (18,406–12,728] and girls [18,864 (22,640–15,717] (both p<0.001, respectively. All differences remained after adjustment for body fat percentage (BF%, aerobic fitness, age and puberty. The leptin/adiponectin ratio was higher in Danish boys and tended to be higher in Danish girls compared to northern living Inuit boys and girls, respectively. These differences were eliminated after adjustment for BF%, aerobic fitness, age and puberty. Conclusions. In contrast to our hypothesis, plasma leptin was higher in Danish children despite a more healthy metabolic profile compared to Inuit children. As expected, plasma adiponectin was lowest in Inuit children with the most adverse metabolic profile.

  6. Chlorogenic Acid Improves Late Diabetes through Adiponectin Receptor Signaling Pathways in db/db Mice

    Shasha Jin; Cuiqing Chang; Lantao Zhang; Yang Liu; Xianren Huang; Zhimin Chen

    2015-01-01

    The aim of this study was to examine the effects of chlorogenic acid (CGA) on glucose and lipid metabolism in late diabetic db/db mice, as well as on adiponectin receptors and their signaling molecules, to provide evidence for CGA in the prevention of type 2 diabetes. We randomly divided 16 female db/db mice into db/db-CGA and db/db-control (CON) groups equally; db/m mice were used as control mice. The mice in both the db/db-CGA and db/m-CGA groups were administered 80 mg/kg/d CGA by lavage f...

  7. Chronic Kidney Disease, Obesity, and Hypertension: The Role of Leptin and Adiponectin

    M. Tesauro

    2012-01-01

    Full Text Available Chronic kidney disease is a major public health problem and characterized by a progressive loss in renal function over a period of months or years as defined by structural or functional abnormalities of the kidney. Several elements contribute to determine a progression of the kidney injury, inducing a worsening of renal damage and accelerating the decline of renal function: obesity and hypertension are two known factors of kidney progression. Remarkable improvements have been recently achieved in the study of the endocrine features of the adipose tissue and have been able to produce hormone-like peptides named adipokines or adipocytokines. Among these adipocytokines, which represent a link between obesity, hypertension, and chronic nephropathy, leptins and adiponectin appear to play an important role. Leptin not only is a prohypertension element (renal progression factor through the activation sympathetic nervous, but also is able to induce prosclerotic effects directly on the kidney. In contrast, a decline of adiponectin levels has been shown to be related to a picture of hypertension: an endothelial dysfunction has been described as the main pathogenic mechanism responsible for this phenomenon.

  8. Naringenin Inhibits Adipogenesis and Reduces Insulin Sensitivity and Adiponectin Expression in Adipocytes

    Allison J. Richard

    2013-01-01

    Full Text Available Adipose tissue development and function are widely studied to examine the relationship between obesity and the metabolic syndrome. It is well documented that the inability of adipose tissue to properly increase its lipid storage capacity during the obese state can lead to metabolic dysfunction. In a blind screen of 425 botanicals, we identified naringenin as an inhibitor of adipocyte differentiation. Naringenin is one of the most abundant citrus flavonoids, and recent studies have demonstrated antihyperlipidemic capabilities. These studies have largely focused on the effects of naringenin on the liver. Our biochemical studies clearly demonstrate that naringenin inhibits adipogenesis and impairs mature fat cell function. Naringenin specifically inhibited adipogenesis in a dose-dependent fashion as judged by examining lipid accumulation and induction of adipocyte marker protein expression. In mature 3T3-L1 adipocytes, naringenin reduced the ability of insulin to induce IRS-1 tyrosine phosphorylation and substantially inhibited insulin-stimulated glucose uptake in a dose-dependent manner and over a time frame of 1.5 to 24 hours. Exposure to naringenin also inhibited adiponectin protein expression in mature murine and human adipocytes. Our studies have revealed that naringenin may have a negative impact on adipocyte-related diseases by limiting differentiation of preadipocytes, by significantly inducing insulin resistance, and by decreasing adiponectin expression in mature fat cells.

  9. Globular adiponectin activates motility and regenerative traits of muscle satellite cells.

    Tania Fiaschi

    Full Text Available Regeneration of adult injured skeletal muscle is due to activation of satellite cells, a population of stem cells resident beneath the basal lamina. Thus, information on soluble factors affecting satellite cell activation, as well as migration towards injury and fusion into new myofibers are essential. Here, we show that globular adiponectin (gAd, positively affects several features of muscle satellite cells. gAd activates satellite cells to exit quiescence and increases their recruitment towards myotubes. gAd elicits in satellite cells a specific motility program, involving activation of the small GTPase Rac1, as well as expression of Snail and Twist transcription factors driving a proteolytic motility, useful to reach the site of injury. We show that satellite cells produce autocrine full length adiponectin (fAd, which is converted to gAd by activated macrophages. In turns, gAd concurs to attract to the site of injury both satellite cells and macrophages and induces myogenesis in muscle satellite cells. Thus, these findings add a further role for gAd in skeletal muscle, including the hormone among factors participating in muscle regeneration.

  10. 肥胖儿童脂联素水平与肥胖相关生化指标的研究%Study on the adiponectin level and the relationship between adiponectin and the related biochemistry variables in obese schoolchildren

    肖黎; 陈新峰; 袁飞; 倪雨中; 俞晓红

    2011-01-01

    Objective This study aims to investigate the level of adiponectin and correlations among serum adiponectin concentration and related biochemistry variables in obese children. Methods Serum adiponectin was analyzed with ELISA. 78 pairs of obese children and normal control children were recruited to study the correlation of adiponectin and serum levels of biochemistry variables. All the children were matched by age, gender and height and were all from junior and middle schools. Results The serum adiponectin of teenagers were not normally distributed. Serum adiponectin concentration was significantly lower in obese children than in control children (7.60μg/ml ± 4.58μg/ml vs 10.08 μg/ml ± 5.36μg/ml, P < 0.05; Median P506.12μg/ml vs 8.71μg/ml). The abnormality rates of ALT and TG are higher in obese children than that in normal children. Serum adiponectin concentration was positively correlated with APO-A1 (r=0.32, P=0.012) but negatively correlated with GLU (r= -0.33, P=0.004) in normal children. Serum adiponectin concentration was positively correlated with GLU ( r = 0.23, P = 0.041 ) but negatively correlated with GGT (r= -0.25,P=0.049), insulin (r= -0.31,P=0.006) and ISI (r= -0.36,P=0.001) in obese children. Conclusions The serum adiponectin level is significantly lower in obese children than that in normal children. There are certain correlations among adiponectin, liver cell injury, and derangement of glucose and lipid metabolism.%目的 探讨肥胖儿体内脂联素水平的变化情况及脂联素与肥胖相关生化指标的关系.方法 采用配对设计,测定78对肥胖和对照儿童的血清脂联素,胰岛素,糖、脂代谢指标等.结果 儿童脂联素测定值为非正态分布.肥胖儿童脂联素水平低于正常对照儿童(7.60 μg/ml±4.58 μg/ml vs 10.08 μg/ml±5.36 μg/ml,P<0.05;中位数P50 6.12 μg/ml vs 8.71μg/ml).肥胖组谷丙转氨酶、甘油三酯的异常率都明显高于对照组.正常体重儿童的脂

  11. High adiponectin levels fail to protect against the risk of hypertension and,in women,against coronary disease:involvement in autoimmunity?

    Altan; Onat; Mesut; Aydln; Günay; Can; Bayram; Kroglu; Ahmet; Karagz; Servet; Altay

    2013-01-01

    AIM:To investigate whether serum adiponectin protects against cardiometabolic risk in a population sample with prevailing metabolic syndrome.METHODS:Middle-aged adults representative of a general population with baseline circulating adiponectin measurements(n=1224)were analyzed prospectively at a mean of 3.8 years’follow-up,using continuous values or sex-specific tertiles.Total adiponectin was assayed by an ELISA kit.Type-2 diabetes was identified by criteria of the American Diabetes Association.Hypertension was defined as a blood pressure≥140 mmHg and/or≥90 mmHg and/or use of antihypertensive medication.Outcomes were predicted using Cox proportional hazards regression analysis in models that were controlled for potential confounders.RESULTS:In models of multiple linear regression,sex hormone-binding globulin,fasting insulin(inverse)and,in men,age were significant independent covariates of serum adiponectin which further tended in women to be positively associated with serum creatinine.Cox regression analyses for incident coronary heart disease(CHD),adjusted for sex,age,non-HDL cholesterol,waist circumference and C-reactive protein,revealed significant inverse association with adiponectin tertiles in men but not women(HR=0.66;95%CI:0.32-1.38 for highest tertile).Cox regression for type-2 diabetes in a similar model(wherein glucose replaced non-HDL cholesterol),adiponectin tertiles appeared to protect in each gender.HR for incident hypertension roughly displayed unity in each of the adiponectin tertiles(P-trend=0.67).CONCLUSION:High adiponectin levels failed to protect against the development of hypertension and,in women,against CHD,presumably paralleling impairment in renal function as well.Involvement of adiponectin in autoimmune complex with loss of antioxidative-antiatherogenic properties may be underlying.

  12. Perinatal BPA Exposure Induces Hyperglycemia, Oxidative Stress and Decreased Adiponectin Production in Later Life of Male Rat Offspring

    Shunzhe Song

    2014-04-01

    Full Text Available The main object of the present study was to explore the effect of perinatal bisphenol A (BPA exposure on glucose metabolism in early and later life of male rat offspring, and to establish the potential mechanism of BPA-induced dysglycemia. Pregnant rats were treated with either vehicle or BPA by drinking water at concentrations of 1 and 10 µg/mL BPA from gestation day 6 through the end of lactation. We measured the levels of fasting serum glucose, insulin, adiponectin and parameters of oxidative stress on postnatal day (PND 50 and PND100 in male offspring, and adiponectin mRNA and protein expression in adipose tissue were also examined. Our results showed that perinatal exposure to 1 or 10 µg/mL BPA induced hyperglycemia with insulin resistance on PND100, but only 10 µg/mL BPA exposure had similar effects as early as PND50. In addition, increased oxidative stress and decreased adiponectin production were also observed in BPA exposed male offspring. Our findings indicated that perinatal exposure to BPA resulted in abnormal glucose metabolism in later life of male offspring, with an earlier and more exacerbated effect at higher doses. Down-regulated expression of adiponectin gene and increased oxidative stress induced by BPA may be associated with insulin resistance.

  13. Serum Adiponectin and Leptin Concentrations in Relation to Body Fat Distribution, Hematological Indices and Lipid Profile in Humans

    Anna Lubkowska

    2015-09-01

    Full Text Available The purpose of the study was to evaluate the relationship between serum adiponectin and leptin concentrations and body composition, hematological indices and lipid profile parameters in adults. The study involved 95 volunteers (BMI from 23.3 to 53 kg/m2. Anthropometric parameters were measured: body weight and height, waist and hip circumference, waist-to-hip ratio, body fat mass (BMF, subcutaneous and visceral fat mass (SFM, VFM, lean body mass (LBM, skeletal muscle mass (SMM. In serum we determined adiponectin and leptin concentrations, extracellular hemoglobin, total bilirubin, as well as lipid metabolism (TCh, HDL-Ch, LDL-Ch, TG. Mean adipokine levels were significantly higher in women (p ≤ 0.01, adiponectin significantly negatively correlated with body height and weight, systolic blood pressure and absolute LBM and SMM values. The same relation was observed for erythroid system indicators and lipid indicators. A positive correlation was exceptionally found between adiponectin and HDL-Ch. LEP negatively correlated with some percentage rates (%LBM, %SMM. Only in women, we observed a positive correlation between LEP and body weight, BMI and WHR. Studies on ADPN and the ADPN/LEP ratio as a valuable complementary diagnostic element in the prediction and prevention of cardiovascular diseases need to be continued.

  14. Negative association between plasma levels of adiponectin and polychlorinated biphenyl 153 in obese women under non-energy-restrictive regime

    Mullerová, D.; Kopecký, Jan; Matějková, D.; Muller, L.; Rosmus, J.; Racek, J.; Šefrna, F.; Opatrná, S.; Kuda, Ondřej; Matejovic, M.

    2008-01-01

    Roč. 32, č. 12 (2008), s. 1875-1878. ISSN 0307-0565 Institutional research plan: CEZ:AV0Z50110509 Keywords : POPs * adiponectin * PCB 153 Subject RIV: FB - Endocrinology, Diabetology, Metabolism, Nutrition Impact factor: 3.640, year: 2008

  15. The effects of adiponectin and metformin on prostate and colon neoplasia involve activation of AMP-activated protein kinase.

    Zakikhani, Mahvash; Dowling, Ryan J O; Sonenberg, Nahum; Pollak, Michael N

    2008-10-01

    Population studies provide evidence that obesity and insulin resistance are associated not only with elevated serum insulin levels and reduced serum adiponectin levels but also with increased risk of aggressive prostate and colon cancer. We show here that adiponectin activates AMP-activated protein kinase (AMPK) in colon (HT-29) and prostate (PC-3) cancer cells. These results are consistent with prior observations in myocytes, but we show that in epithelial cancer cells AMPK activation is associated with reduction in mammalian target of rapamycin activation as estimated by Ser(2448) phosphorylation, with reduction in p70S6 kinase activation as estimated by Thr(389) phosphorylation, with ribosomal protein S6 activation as estimated by Ser(235/236) phosphorylation, with reduction in protein translation as estimated by [(35)S]methionine incorporation, and with growth inhibition. Adiponectin-induced growth inhibition is significantly attenuated when AMPK level is reduced using small interfering RNA, indicating that AMPK is involved in mediating the antiproliferative action of this adipokine. Thus, adiponectin has the characteristics of a AMPK-dependent growth inhibitor that is deficient in obesity, and this may contribute to the adverse effects of obesity on neoplastic disease. Furthermore, metformin was observed to activate AMPK and to have growth inhibitory actions on prostate and colon cancer cells, suggesting that this compound may be of particular value in attenuating the adverse effects of obesity on neoplasia. PMID:19138981

  16. Association of adiponectin,free fatty acids,and insulin resistance with metabolic syndrome and its components in Uygur Xinjiang

    闫贻忠

    2014-01-01

    Objective To investigate the association of adiponectin(APN),free fatty acids(FFA),and insulin resistance(IR)with metabolic syndrome(MS)and its components.Methods In the baseline survey,the subjects were divided into MS group and the control group based

  17. A rosiglitazone-induced increase in adiponectin does not improve glucose metabolism in HIV-infected patients with overt lipoatrophy

    R.M.E. Blümer; M. van der Valk; M. Ackermans; E. Endert; M.J. Serlie; P. Reiss; H.P. Sauerwein

    2009-01-01

    Blumer RM, van der Valk M, Ackermans M, Endert E, Serlie MJ, Reiss P, Sauerwein HP. A rosiglitazone-induced increase in adiponectin does not improve glucose metabolism in HIV-infected patients with overt lipoatrophy. Am J Physiol Endocrinol Metab 297: E1097-E1104, 2009. First published August 18, 20

  18. Adiponectin levels are associated with the number and activity of circulating endothelial progenitor cells in patients with coronary artery disease

    Zhi-qiang YING; Dan-dan ZHONG; Geng XU; Miao-yan CHEN; Qing-yu CHEN

    2009-01-01

    Objective: To study the relationship between plasma adiponectin concentration and the functional activities of circulating endothelial progenitor cells (EPCs) in patients with coronary artery disease (CAD). Methods: Circulating EPCs were enumerated as AC133+/KDR+ cells via flow cytometry and identified by co-staining with Dii-acLDL and fluorescein isothiocy-anate (FITC)-conjugated lectin under a fluorescent microscope. The migratory capacity of EPCs was measured by modified Boyden chamber assay. Adhesion capacity was performed to count adherent cells after replating EPCs on six-well culture dishes coated with fibronectin. Results: The number of circulating EPCs (AC133+/KDR+ cells) decreased significantly in CAD patients, compared with control subjects [(74.2±12.3) vs (83.5±12.9) cells/ml blood, P<0.0\\]. In addition, the number of EPCs also decreased in CAD patients after ex vivo cultivation [(54.4±8.6) vs (71.9±11.6) EPCs/field, P<0.01]. Both circulating EPCs and differentiated EPCs were positively correlated with plasma adiponectin concentration. The functional activities of EPCs from CAD patients, such as migratory and adherent capacities, were also impaired, compared with control subjects, and positively correlated with plasma adiponectin concentration. Conclusion: The study demonstrates that the impairment of the number and functional activities of EPCs in CAD patients is correlated with their lower plasma adiponectin concentrations.

  19. The effect of moderate alcohol consumption on adiponectin oligomers and muscle oxidative capacity: A human intervention study

    Beulens, J.W.J.; Loon, L.J.C. van; Kok, F.J.; Pelsers, M.; Bobbert, T.; Spranger, J.; Helander, A.; Hendriks, H.F.J.

    2007-01-01

    Aims/hypothesis: The aim of this study was to investigate whether moderate alcohol consumption increases plasma high molecular weight (HMW) adiponectin and/or muscle oxidative capacity. Materials and methods: Eleven lean (BMI 18-25 kg/m2) and eight overweight (BMI ≥27 kg/m2) men consumed 100 ml whis

  20. The effect of moderate alcohol consumption on adiponectin oligomers and muscle oxidative capacity: a human intervention study

    Beulens, J.W.J.; Loon, van L.J.C.; Kok, F.J.; Pelsers, M.; Bobbert, T.; Spranger, J.; Helander, A.; Hendriks, H.F.J.

    2007-01-01

    Aims/hypothesis The aim of this study was to investigate whether moderate alcohol consumption increases plasma high molecular weight (HMW) adiponectin and/or muscle oxidative capacity. Materials and methods Eleven lean (BMI 18 - 25 kg/m(2)) and eight overweight ( BMI >= 27 kg/m(2)) men consumed 1

  1. Adiponectin Gene Variants are Associated with Insulin Sensitivity in Response to Dietary Fat Consumption in Caucasian Men

    Adiponectin (adipoQ) gene variants have been associated with type 2 diabetes mellitus and insulin resistance. Our aim was to examine whether the presence of several polymorphisms at the adipoQ gene locus (211391 G . A, 211377C.G, 45 T.G, and 276 G.T) influences the insulin sensitivity to dietary fat...

  2. Adiponectin provides additional information to conventional cardiovascular risk factors for assessing the risk of atherosclerosis in both genders.

    Jin-Ha Yoon

    Full Text Available BACKGROUND: This study evaluated the relation between adiponectin and atherosclerosis in both genders, and investigated whether adiponectin provides useful additional information for assessing the risk of atherosclerosis. METHODS: We measured serum adiponectin levels and other cardiovascular risk factors in 1033 subjects (454 men, 579 women from the Korean Genomic Rural Cohort study. Carotid intima-media-thickness (CIMT was used as measure of atherosclerosis. Odds ratios (ORs with 95% confidence intervals (95% CI were calculated using multiple logistic regression, and receiver operating characteristic curves (ROC, the category-free net reclassification improvement (NRI and integrated discrimination improvement (IDI were calculated. RESULTS: After adjustment for conventional cardiovascular risk factors, such as age, waist circumference, smoking history, low-density and high-density lipoprotein cholesterol, triglycerides, systolic blood pressure and insulin resistance, the ORs (95%CI of the third tertile adiponectin group were 0.42 (0.25-0.72 in men and 0.47 (0.29-0.75 in women. The area under the curve (AUC on the ROC analysis increased significantly by 0.025 in men and 0.022 in women when adiponectin was added to the logistic model of conventional cardiovascular risk factors (AUC in men: 0.655 to 0.680, p = 0.038; AUC in women: 0.654 to 0.676, p = 0.041. The NRI was 0.32 (95%CI: 0.13-0.50, p<0.001, and the IDI was 0.03 (95%CI: 0.01-0.04, p<0.001 for men. For women, the category-free NRI was 0.18 (95%CI: 0.02-0.34, p = 0.031 and the IDI was 0.003 (95%CI: -0.002-0.008, p = 0.189. CONCLUSION: Adiponectin and atherosclerosis were significantly related in both genders, and these relationships were independent of conventional cardiovascular risk factors. Furthermore, adiponectin provided additional information to conventional cardiovascular risk factors regarding the risk of atherosclerosis.

  3. Effect of Exercise Training on Adiponectin Receptor Expression and Insulin Resistance in Mice Fed a High Fat Diet

    Naglaa Fathy Alhusseini

    2010-01-01

    Full Text Available Problem statement: Adiponectin is an adipocyte secreted hormones, exerts its effects via the specific receptors. AdipoR1 and adipoR2 and plays a pivotal role in lipid and glucose metabolism. Approach: We investigated the effect of increased physical activities on insulin resistance and if this effect is modulated through adiponectin receptor expression. Results: We also assessed the effect of High Fat Diet (HFD on adipoRs expression. Mice were subjected to 16 weeks of HFD protocol then to 4, 6 and 8 weeks of exercise training. Following the experimental protocol the fasting plasma glucose, insulin and index of Homeostasis Model Assessment of insulin Resistance (HOMA-R were evaluated. The mRNA expression of adiponectin receptors genes were also analyzed using reverse transcription RT-PCR. The consumption of high fat diet by the mice for 16 weeks resulted in a significant increase in weight associated with insulin resistance and associated with significant decrease in adiponectin receptors R1 and R2 expression in both liver and skeletal muscle. Exercise training for 4 weeks resulted in a significant improvement in the insulin resistance state, significant increase in expression of AdipoR1 and AdipoR2 in both liver and skeletal muscles. On increasing duration of exercise training for 6 weeks and 8 weeks there was significant improvement in insulin resistance and significant increase in the expression of AdipoR1 in liver, AdipoR1 and AdipoR2 in muscle, whereas liver AdipoR2 expression was significantly decreased. Conclusion/Recommendations: we conclude that the exercise training improves insulin sensitivity and up-regulates mRNA expression of AdipoR1 in both skeletal muscle and liver in mice and AdiopR2 in muscle and this suggests that the insulin sensitizing effect of exercise training may be mediated even partially through increased adiponectin receptor expression and up regulation of adiponectin receptors reaches certain level and increasing the

  4. Association of adiponectin gene polymorphism with nonalcoholic fatty liver disease in Taiwanese patients with type 2 diabetes.

    Ching-Jung Hsieh

    Full Text Available Patients with type 2 diabetes and nonalcoholic fatty liver disease (NAFLD have a higher prevalence of cardiovascular diseases. In this study we investigated the frequency of single nucleotide polymorphisms (SNPs of several candidate genes associated with NAFLD in Taiwanese patients with type 2 diabetes mellitus (DM and NAFLD and in those with DM but without fatty liver disease.We enrolled 350 patients with type 2 DM and NAFLD and 209 patients with DM but without NAFLD. Body mass index (BMI, % body fat (% BF, glycated hemoglobin (HbA1c, high molecular weight (HMW isoform of adiponectin, aspartate aminotransferase (AST, alanine aminotransferase (ALT, total cholesterol (TC, low-density lipoprotein (LDL, high-density lipoprotein (HDL, and triglyceride (TG levels were measured. Thirteen SNPs in 5 genes (adiponectin, leptin, peroxisome proliferator-activated receptor alpha, adiponutrin/patatin-like phospholipase domain-containing protein 3 and peroxisome proliferator-activated receptor γ co-activator 1α were measured.Only adiponectin rs266729 polymorphism was associated with susceptibility to NAFLD (p = 0.001. Subgroup analysis revealed that the proportion of subjects with homozygous genotype GG was higher in patients with NAFLD (31% than in controls (11% and that the proportions of heterozygous CG and homozygous CC were higher in controls (37% and 52%, respectively than in patients with NAFLD (33% and 36%, respectively. Patients with NAFLD carrying the GG genotype of rs266729 showed significantly lower serum HMW adiponectin levels than patients carrying the GC or CC genotype (3.75±0.37 vs. 3.99±0.66 vs. 4.79±0.58 μg/ml, p< 0.001. Body fat and serum HMW adiponectin levels were the strongest predictors of developing NAFLD (p < 0.001 and 0.004, respectively.In patients with type 2 diabetes gene polymorphism of adiponectin rs266729 is associated with risk of NAFLD. G allele of rs266729 is associated with hypoadiponectinemia. Low serum adiponectin

  5. Association of Adiponectin SNP+45 and SNP+276 with Type 2 Diabetes in Han Chinese Populations: A Meta-Analysis of 26 Case-Control Studies

    Yiping Li; Xianli Li; Li Shi; Man Yang; Ying Yang; Wenyu Tao; Lei Shi; Yuxin Xiong; Ying Zhang; Yufeng Yao

    2011-01-01

    Recently, many studies have reported that the SNP+45(T>G) and SNP+276(G>T) polymorphisms in the adiponectin gene are associated with type 2 diabetes (T2DM) in the Chinese Han population. However, the previous studies yielded many conflicting results. Thus, a meta-analysis of the association of the adiponectin gene with T2DM in the Chinese Han population is required. In the current study, we first determined the distribution of the adiponectin SNP+276 polymorphism in T2DM and nondiabetes (NDM)...

  6. IMPACT OF DIET, EXERCISE AND DIET COMBINED WITH EXERCISE PROGRAMS ON PLASMA LIPOPROTEIN AND ADIPONECTIN LEVELS IN OBESE GIRLS

    Omar Ben Ounis

    2008-12-01

    Full Text Available We studied the effect of three programs, diet restriction (D, individualized exercise training (E at the maximal lipid oxidation point (LIPOXmax and diet combined with exercise (D+E, on body mass, plasma lipoprotein and adiponectin levels in obese girls. Eighteen obese adolescents girls aged 12-14 years were studied. A longitudinal intervention was carried out, consisting of a two-month diet (D; -500 kcal·day-1, of individualized exercise (E; 4 days/week, 90 min·day-1 and of diet combined with exercise (D+E. Body mass, body mass index (BMI, body fat mass, waist circumference, substrate crossover point, LIPOXmax point, homeostasis model assessment (HOMA-IR index, fasting levels of lipids and circulatory adiponectin, were measured in all subjects before and after the program. In subjects of the D+E group, body mass, BMI, body fat mass, waist circumference, HOMA-IR, low-density lipoprotein cholesterol (LDL-C and total cholesterol / high-density lipoprotein cholesterol (TC/HDL-C ratio were significantly lower, and HDL-C and adiponectin were higher after the program than that of subjects in the D or E groups. Diet/exercise improved the ability to oxidize lipids during exercise (crossover point: + 18.5 ± 3.4 of % Wmax; p < 0.01 and fat oxidation rate at LIPOXmax: + 89.7 ± 19.7 mg·min-1; p < 0.01. In the D+E group, significant correlations were found between changes in body mass and adiponectin and between changes in the TC/HDL-C ratio and LIPOXmax. These findings show that the combined program of diet restriction and individualized exercise training at the LIPOXmax point is necessary to simultaneously improve body mass loss, adiponectin levels, as well as metabolic parameters, in obese girls

  7. Additive regulation of adiponectin expression by the mediterranean diet olive oil components oleic Acid and hydroxytyrosol in human adipocytes.

    Scoditti, Egeria; Massaro, Marika; Carluccio, Maria Annunziata; Pellegrino, Mariangela; Wabitsch, Martin; Calabriso, Nadia; Storelli, Carlo; De Caterina, Raffaele

    2015-01-01

    Adiponectin, an adipocyte-derived insulin-sensitizing and anti-inflammatory hormone, is suppressed in obesity through mechanisms involving chronic inflammation and oxidative stress. Olive oil consumption is associated with beneficial cardiometabolic actions, with possible contributions from the antioxidant phenol hydroxytyrosol (HT) and the monounsaturated fatty acid oleic acid (OA, 18:1n-9 cis), both possessing anti-inflammatory and vasculo-protective properties. We determined the effects of HT and OA, alone and in combination, on adiponectin expression in human and murine adipocytes under pro-inflammatory conditions induced by the cytokine tumor necrosis factor(TNF)-α. We used human Simpson-Golabi-Behmel syndrome (SGBS) adipocytes and murine 3T3-L1 adipocytes as cell model systems, and pretreated them with 1-100 μmol/L OA, 0.1-20 μmol/L HT or OA plus HT combination before stimulation with 10 ng/mL TNF-α. OA or HT significantly (Pwell as mRNA levels (by 30% compared with TNF-α alone). HT and OA also prevented-by 35%-TNF-α-induced downregulation of peroxisome proliferator-activated receptor PPARγ. Co-treatment with HT and OA restored adiponectin and PPARγ expression in an additive manner compared with single treatments. Exploring the activation of JNK, which is crucial for both adiponectin and PPARγ suppression by TNF-α, we found that HT and OA additively attenuated TNF-α-stimulated JNK phosphorylation (up to 55% inhibition). In conclusion, the virgin olive oil components OA and HT, at nutritionally relevant concentrations, have additive effects in preventing adiponectin downregulation in inflamed adipocytes through an attenuation of JNK-mediated PPARγ suppression. PMID:26030149

  8. Variations of tumor necrosis factor-α,leptin and adiponectin in mid-trimester of gestational diabetes mellitus

    GAO Xue-lian; YANG Hui-xia; ZHAO Yi

    2008-01-01

    Background Many cytokines have been found to increase the insulin resistance during pregnancy complicated by glucose metabolism disorder. This study aimed to investigate which comes first, the changes of some cytokines or the abnormal glucose metabolism. Methods This nested case-control study was undertaken from January 2004 to March 2005. Twenty-two women with gestational diabetes mellitus(GDM), 10 with gestational impaired glucose tolerance(GIGT), and 20 healthy pregnant women were chosen from the women who had visited the antenatal clinics and had blood samples prospectively taken and kept during their visit. The levels of tumor necrosis factor-α(TNF-α), leptin and adiponectin were determined. One-way ANOVA analysis and bivariate correlation analysis were used to assess the laboratory results and their relationship with body mass index(BMI). Results Women with GDM have the highest values of TNF-α and leptin and the lowest value of adiponectin compared with those with GIGT and the healthy controls(P<0.01)at 14-20 weeks of gestation. This was also found when these women progressed to 24-32 weeks. The significantly increased levels of TNF-α and leptin and the decreased level of adiponectin were found at the different periods of gestation within the same group. Positive correlation was shown between the levels of TNF-α and leptin at the two periods of gestation with the BMI at 14-20 weeks. while adiponectin was negatively correlated (P<0.05). Conclusions The concentrations of TNF-α. leptin and adiponectin may change before the appearance of the abnormal glucose level during pregnancy. Further studies are required to verify the mechanism of this alteration and whether the three cytokines can be predictors for GDM at an early stage of pregnancy.

  9. Plasma adiponectin concentration is associated with skeletal muscle insulin receptor tyrosine phosphorylation, and low plasma concentration precedes a decrease in whole-body insulin sensitivity in humans

    Stefan, Norbert; Vozarova, Barbora; Funahashi, Tohru;

    2002-01-01

    -induced tyrosine phosphorylation of the insulin receptor (IR) and also increase whole-body insulin sensitivity. To further characterize the relationship between plasma adiponectin concentration and insulin sensitivity in humans, we examined 1) the cross-sectional association between plasma adiponectin...... concentration and skeletal muscle IR tyrosine phosphorylation and 2) the prospective effect of plasma adiponectin concentration at baseline on change in insulin sensitivity. Fasting plasma adiponectin concentration, body composition (hydrodensitometry or dual energy X-ray absorptiometry), insulin sensitivity...... (insulin-stimulated glucose disposal, hyperinsulinemic clamp), and glucose tolerance (75-g oral glucose tolerance test) were measured in 55 Pima Indians (47 men and 8 women, aged 31 +/- 8 years, body fat 29 +/- 8% [mean +/- SD]; 50 with normal glucose tolerance, 3 with impaired glucose tolerance, and 2...

  10. Evaluation of metabolic risk markers in polycystic ovary syndrome (PCOS). Adiponectin, ghrelin, leptin and body composition in hirsute PCOS patients and controls

    Glintborg, Dorte; Andersen, Marianne; Hagen, Claus;

    2006-01-01

    OBJECTIVE: Polycystic ovary syndrome (PCOS) patients are abdominally obese and are at increased risk of developing the metabolic syndrome. Low adiponectin and ghrelin levels in PCOS patients could be caused by insulin resistance as well as high testosterone levels. DESIGN: Adiponectin and ghrelin...... levels were evaluated in 51 hirsute PCOS patients referred to the outpatient clinic of an academic, tertiary care medical centre and in 63 weight-matched female controls. Relationships between adiponectin, ghrelin, leptin, body composition, testosterone and insulin were examined. METHODS: Measurements of....... RESULTS: Adiponectin levels were significantly decreased in obese PCOS patients compared with weight-matched controls (geometric mean (-2 to 2 s.d.) 5.3 (2.5-11.1) vs 7.3 (3.0-17.4) mg/l, P<0.05). Mean ghrelin was significantly lower in hirsute PCOS patients than in controls (0.6 (0.3 to 1.4) vs 0.8 (0...

  11. The effect of menopause on carotid artery remodeling, insulin sensitivity, and plasma adiponectin in healthy women

    Muscelli, Elza; Kozàkovà, Michaela; Flyvbjerg, Allan;

    2009-01-01

    secretion and sensitivity, plasma adiponectin), and carotid intima-media thickness (IMT) in healthy women. METHODS: In 74 menopausal women (mean age = 51 +/- 3 years, mean duration of menopause = 2.9 +/- 1.2 years) and in 74 nonmenopausal women comparable for age and body mass index (BMI), common carotid...... mathematical modeling. RESULTS: CCA diameter (5.55 +/- 0.46 vs. 5.21+/- 0.51 mm, P < 0.001), CCA IMT (608 +/- 78 vs. 576 +/- 74 microm, P < 0.01) and systolic blood pressure (BP) (117 +/- 12 vs. 113 +/- 11 mm Hg, P < 0.05) were higher in menopausal women, whereas CCA IMT/diameter ratio and IMT in other carotid...

  12. Association of polymorphism in adiponectin (+45 T/G) and leptin (–2548 G/A) genes with type 2 diabetes mellitus in male Egyptians

    Motawi, Tarek; Salman, Tarek; Shaker, Olfat

    2015-01-01

    Introduction Adiponectin is an adipose tissue-specific protein with insulin-sensitizing properties. Many investigators have explored the association between adiponectin single nucleotide polymorphisms (SNPs) and type 2 diabetes mellitus (T2DM) in different ethnic populations from different regions. Leptin is a protein hormone constituting an important signal in the regulation of adipose tissue mass and body weight. The aim of this study was to explore potential associations between SNP +45 T>G of the adiponectin gene and SNP 2548G/A of leptin with T2DM and the effect of SNPs on serum adiponectin and leptin levels. Material and methods From the Egyptian population, we enrolled 110 T2DM patients and 90 non-diabetic controls. Serum lipid profile, blood glucose, serum adiponectin, and leptin were measured. Genotyping for two common SNPs of the adiponectin and leptin genes was performed by polymerase chain reaction–restriction fragment length polymorphism. Results The G allele and TG/GG genotype of SNP 45 occurred more frequently than the T allele and TT genotype in T2DM patients compares to the controls. Subjects with the GG + TG genotype of SNP 45 were at increased risk for T2DM (OR = 6.476; 95% CI: 3.401–12.33) and associated with a low serum adiponectin level compared with the TT genotype. The serum leptin concentration of GA + AA genotype carriers was not significantly different from that of the GG genotype in the diabetic group. Conclusions The G allele carriers who have reduced plasma concentrations of adiponectin may have an association with T2DM, while leptin SNP 2548 G/A is not associated with the risk of development of T2DM in the Egyptian population. PMID:26528333

  13. A comparison of osteoprotegerin with adiponectin and high-sensitivity C-reactive protein (hsCRP) as a marker for insulin resistance.

    O'Sullivan, Eoin P

    2013-01-01

    Insulin resistance (IR) is associated with low adiponectin and elevated high sensitivity C-reactive protein (hsCRP). Osteoprotegerin (OPG) has been shown to be elevated in type 2 diabetes, but whether it reflects underlying IR is unclear. We aimed to compare the ability of serum OPG with adiponectin and hsCRP to act as a marker for IR in individuals with normal and abnormal glucose tolerance.

  14. Acute knockdown of the insulin receptor or its substrates Irs1 and 2 in 3T3-L1 adipocytes suppresses adiponectin production

    Groeneveld, Matthijs P; Brierley, Gemma V.; Rocha, Nuno M.; Kenneth Siddle; Semple, Robert K.

    2016-01-01

    Loss of function of the insulin receptor (INSR) in humans produces severe insulin resistance. Unlike “common” insulin resistance, this is associated with elevated plasma levels of the insulin-sensitising, adipose-derived protein adiponectin. The underlying mechanism for this paradox is unclear, and it is at odds with the acute stimulation of adiponectin secretion reported on insulin treatment of cultured adipocytes. Given recent evidence for ligand-independent actions of the INSR, we used a l...

  15. Potential impact of renin-angiotensin system inhibitors and calcium channel blockers on plasma high-molecular-weight adiponectin levels in hemodialysis patients

    Although metabolic syndrome confers an increased risk of cardiovascular disease in the general population, little is known about the alteration of abdominal adiposity and its association with adipocytokines in hemodialysis patients. We investigated the plasma high-molecular-weight (HMW) adiponectin level and its relationship to visceral fat area (VFA) and various markers of atherosclerosis in hemodialysis patients. In a cross-sectional study, conventional cardiovascular risk factors, plasma total and HMW adiponectin, the number of components of the metabolic syndrome and, using computed tomography, the distribution of abdominal adiposity were assessed in 144 hemodialysis patients (90 men and 54 women; mean age, 60.7 years) and 30 age- and sex-matched patients with chronic kidney disease (CKD). Plasma HMW adiponectin levels in hemodialysis patients were significantly higher than those in patients with CKD, negatively associated with VFA and serum triglycerides and positively associated with plasma total adiponectin, as well as the HMW-to-total adiponectin ratio in men and women (all P<0.05) in a simple regression analysis. In a multiple regression analysis, VFA was a significant determinant of HMW adiponectin in hemodialysis patients. Furthermore, after adjustment for classical risk factors, HMW adiponectin levels were significantly higher in patients undergoing treatment with renin-angiotensin system inhibitors or calcium channel blockers compared with patients not undergoing such treatment. This study shows that plasma HMW adiponectin levels were negatively associated with VFA and positively associated with treatment with blockade of the renin-angiotensin system and of the calcium channel. Therefore, these drugs might be effective for improving adipocytokine-related metabolic abnormalities in hemodialysis patients. (author)

  16. High-molecular-weight adiponectin is selectively reduced in women with polycystic ovary syndrome independent of body mass index and severity of insulin resistance.

    O'Connor, A

    2010-03-01

    Context: High-molecular-weight (HMW) adiponectin contributes to insulin resistance (IR), which is closely associated with the pathophysiology of polycystic ovary syndrome (PCOS). Abnormalities in adipocyte function have been identified in PCOS and potentially contribute to lower adiponectin concentrations. Objective: Our objective was to determine which variables in plasma and adipose tissue influence HMW adiponectin in a well characterized cohort of women with PCOS. Design: This was a cross-sectional study. Settings and Participants: A teaching hospital. Women with PCOS (n = 98) and body mass index (BMI)-matched controls (n = 103) (including 68 age-, BMI-, and IR-matched pairs). Interventions: A standard 75-g oral glucose tolerance test was performed for each participant. Subcutaneous adipose tissue samples were taken by needle biopsy for a subset of PCOS women (n = 9) and controls (n = 8). Main Outcome Measures: Serum levels of HMW adiponectin and their relation to indices of insulin sensitivity, body composition, and circulating androgens as well as adipose tissue expression levels of ADIPOQ, TNFalpha, PPARgamma, and AR were assessed. Results: HMW adiponectin was significantly lower in women with PCOS compared with both BMI- and BMI- and IR-matched controls (P = 0.009 and P = 0.027, respectively). Although BMI and IR were the main predictors of HMW adiponectin, an interaction between waist to hip ratio and plasma testosterone contributed to its variance (P = 0.026). Adipose tissue gene expression analysis demonstrated that AR and TNFalpha (P = 0.008 and P = 0.035, respectively) but not ADIPOQ mRNA levels were increased in PCOS compared with controls. Conclusions: HMW adiponectin is selectively reduced in women with PCOS, independent of BMI and IR. Gene expression analysis suggests that posttranscriptional\\/translational modification contributes to reduced HMW adiponectin in PCOS.

  17. Identification of the promoter region required for human adiponectin gene transcription: Association with CCAAT/enhancer binding protein-β and tumor necrosis factor-α

    Adiponectin, an adipose tissue-specific plasma protein, is involved in insulin sensitizing and has anti-atherosclerotic properties. Plasma levels of adiponectin are decreased in obese individuals and patients with type 2 diabetes with insulin resistance. Tumor necrosis factor-α (TNF-α) decreases the expression of adiponectin in adipocytes. The aims of the present study were: (1) to identify the promoter region responsible for basal transcription of the human adiponectin gene, and (2) to investigate the mechanism by which adiponectin was regulated by TNF-α. The human adiponectin promoter (2.1 kb) was isolated and used for luciferase reporter analysis by transient transfection into 3T3-L1 adipocytes. Deletion analysis demonstrated that the promoter region from -676 to +41 was sufficient for basal transcriptional activity. Mutation analysis of putative response elements for sterol regulatory element binding protein (SREBP) (-431 to -423) and CCAAT/enhancer binding protein (C/EBP) (-230 to -224) showed that both elements were required for basal promoter activity. Adiponectin transcription was increased 3-fold in cells that over-expressed constitutively active C/EBP-β. Electrophoretic mobility shift assay, using nuclear extract from 3T3-L1 cells and the -258 to -199 region as a probe, demonstrated specific DNA-protein binding, which was abolished by TNF-α treatment. The present data indicate that the putative response elements for SREBP and C/EBP are required for human adiponectin promoter activity, and that suppression by TNF-α may, at least in part, be associated with inactivation of C/EBP-β

  18. Ratiometric Measurements of Adiponectin by Mass Spectrometry in Bottlenose Dolphins (Tursiops truncatus) with Iron Overload Reveal an Association with Insulin Resistance and Glucagon

    Neely, Benjamin A.; Kevin P Carlin; Arthur, John M.; McFee, Wayne E.; Janech, Michael G.

    2013-01-01

    High molecular weight (HMW) adiponectin levels are reduced in humans with type 2 diabetes and insulin resistance. Similar to humans with insulin resistance, managed bottlenose dolphins (Tursiops truncatus) diagnosed with hemochromatosis (iron overload) have higher levels of 2 h post-prandial plasma insulin than healthy controls. A parallel reaction monitoring assay for dolphin serum adiponectin was developed based on tryptic peptides identified by mass spectrometry. Using identified post-tran...

  19. Host-derived adiponectin is tumor-suppressive and a novel therapeutic target for multiple myeloma and the associated bone disease

    Fowler, Jessica A.; Lwin, Seint T.; Drake, Matthew T.; Edwards, James R.; Kyle, Robert A.; Mundy, Gregory R; Edwards, Claire M.

    2011-01-01

    The contributions of the host microenvironment to the pathogenesis of multiple myeloma, including progression from the non-malignant disorder monoclonal gammopathy of undetermined significance, are poorly understood. In the present study, microarray analysis of a murine model requiring a unique host microenvironment for myeloma development identified decreased host-derived adiponectin compared with normal mice. In support, clinical analysis revealed decreased serum adiponectin concentrations ...

  20. Impact of the adipokine adiponectin and the hepatokine fetuin-A on the development of type 2 diabetes: prospective cohort- and cross-sectional phenotyping studies.

    Norbert Stefan

    Full Text Available BACKGROUND: Among adipokines and hepatokines, adiponectin and fetuin-A were consistently found to predict the incidence of type 2 diabetes, both by regulating insulin sensitivity. OBJECTIVE: To determine to what extent circulating adiponectin and fetuin-A are independently associated with incident type 2 diabetes in humans, and the major mechanisms involved. METHODS: Relationships with incident diabetes were tested in two cohort studies: within the European Prospective Investigation into Cancer and Nutrition (EPIC-Potsdam study (628 cases and the Nurses' Health Study (NHS; 470 cases. Relationships with body fat compartments, insulin sensitivity and insulin secretion were studied in the Tübingen Lifestyle Intervention Program (TULIP; N = 358. RESULTS: Circulating adiponectin and fetuin-A, independently of several confounders and of each other, associated with risk of diabetes in EPIC-Potsdam (RR for 1 SD: adiponectin: 0.45 [95% CI 0.37-0.54], fetuin-A: 1.18 [1.05-1.32] and the NHS (0.51 [0.42-0.62], 1.35 [1.16-1.58]. Obesity measures considerably attenuated the association of adiponectin, but not of fetuin-A. Subjects with low adiponectin and concomitantly high fetuin-A had the highest risk. Whereas both proteins were independently (both p<1.8×10(-7 associated with insulin sensitivity, circulating fetuin-A (r = -0.37, p = 0.0004, but not adiponectin, associated with insulin secretion in subjects with impaired glucose tolerance. CONCLUSIONS: We provide novel information that adiponectin and fetuin-A independently of each other associate with the diabetes risk. Furthermore, we suggest that they are involved in the development of type 2 diabetes via different mechanisms, possibly by mediating effects of their source tissues, expanded adipose tissue and nonalcoholic fatty liver.

  1. The impact of visceral adipose tissue and high-molecular weight adiponectin on cardio-ankle vascular index in asymptomatic Japanese subjects

    Ohashi, Norihiko; Ito, Chikako; Fujikawa, Rumi; Yamamoto, Hideya; Kihara, Yasuki; Kohno, Nobuoki

    2009-01-01

    Few studies addressed the relation of visceral adiposity and high-molecular weight (HMW) adiponectin to arterial stiffness. We investigated the impact of visceral adipose tissue (VAT) and HMW adiponectin on cardio-ankle vascular index (CAVI) in asymptomatic Japanese subjects. We studied 487 consecutive subjects (271 men and 216 women) who underwent general health examination between October 2005 and May 2008. The abdominal, visceral, and subcutaneous adipose tissue areas were determined by lo...

  2. Cadmium reduces adipocyte size and expression levels of adiponectin and Peg1/Mest in adipose tissue

    Adipose tissue dysfunction has been associated with diabetogenic effects. The effects of repeated Cd exposure on adipocytes remain largely unknown. We administered Cd at doses of 0, 5, 10, and 20 μmol/kg bw sc for 2 weeks (3.5 times/week) to mice and assessed the possible alteration of epididymal white adipose tissue (WAT), including histological difference, adipocyte differentiation and functional capacity. Whereas hepatic weight did not differ between the control and Cd-exposed groups, WAT weight, as well as adipose cell mass, significantly decreased in a dose-dependent manner in Cd-treated mice. The Cd concentration in WAT significantly increased in Cd-treated groups after 2 weeks of exposure. Next, we examined the effects of Cd on adipocyte differentiation and hypertrophy. Cd exposure significantly decreased the paternally expressed gene 1/Mesoderm-specific transcript mRNA expression levels. Both peroxisome proliferator-activated receptor γ2 and CCAAT/enhancer-binding protein α mRNA expression levels in WAT tended to decrease in the Cd-treated groups. Next, we determined the effects of Cd exposure on the mRNA expression levels of adipose-derived hormones, such as adiponectin and resistin. The adiponectin mRNA expression level in WAT decreased after both 6 h and 2 weeks of exposure to a high dose of Cd, and the reduction in resistin mRNA expression levels was observed after 2 weeks of exposure. These results suggest that Cd exposure causes abnormal adipocyte differentiation, expansion, and function, which might lead to development of insulin resistance, hypertension, and cardiovascular disease.

  3. Mitochondrial dysfunction leads to impairment of insulin sensitivity and adiponectin secretion in adipocytes.

    Wang, Chih-Hao; Wang, Ching-Chu; Huang, Hsin-Chang; Wei, Yau-Huei

    2013-02-01

    Adipocytes play an integrative role in the regulation of energy metabolism and glucose homeostasis in the human body. Functional defects in adipocytes may cause systemic disturbance of glucose homeostasis. Recent studies revealed mitochondrial abnormalities in the adipose tissue of patients with type 2 diabetes. In addition, patients with mitochondrial diseases usually manifest systemic metabolic disorder. However, it is unclear how mitochondrial dysfunction in adipocytes affects the regulation of glucose homeostasis. In this study, we induced mitochondrial dysfunction and overproduction of reactive oxygen species (ROS) by addition of respiratory inhibitors oligomycin A and antimycin A and by knockdown of mitochondrial transcription factor A (mtTFA), respectively. We found an attenuation of the insulin response as indicated by lower glucose uptake and decreased phosphorylation of Akt upon insulin stimulation of adipocytes with mitochondrial dysfunction. Furthermore, the expression of glucose transporter 4 (Glut4) and secretion of adiponectin were decreased in adipocytes with increased ROS generated by defective mitochondria. Moreover, the severity of insulin insensitivity was correlated with the extent of mitochondrial dysfunction. These results suggest that higher intracellular ROS levels elicited by mitochondrial dysfunction resulted in impairment of the function of adipocytes in the maintenance of glucose homeostasis through attenuation of insulin signaling, downregulation of Glut4 expression, and decrease in adiponectin secretion. Our findings substantiate the important role of mitochondria in the regulation of glucose homeostasis in adipocytes and also provide a molecular basis for the explanation of the manifestation of diabetes mellitus or insulin insensitivity in a portion of patients with mitochondrial diseases such as MELAS or MERRF syndrome. PMID:23253816

  4. Effect of exercise on chemically-induced colitis in adiponectin deficient mice

    Saxena Arpit

    2012-08-01

    Full Text Available Abstract Background Inflammatory bowel diseases are associated with increased adiponectin (APN levels, which may exert pro-inflammatory effects in these individuals. Since habitual exercise may increase APN, the aim of this study was to determine how exercise training affects mice with acute colitis. Methods Male adiponectin knock out (APNKO and wild type (WT mice (C57BL/6 were randomly assigned to 4 different groups: 1 Sedentary (SED; 2 Exercise trained (ET; 3 Sedentary with dextran sodium sulfate (DSS treatment (SED + DSS; and 4 Exercise trained with DSS (ET + DSS. Exercise-trained mice ran at 18 m/min for 60 min, 5d/wk for 4 weeks. Subsequently, the ET + DSS and the SED + DSS mice received 2% DSS in their drinking water for 5 days (d, followed by 5d of regular water. Results The clinical symptoms of acute colitis (diarrhea, stool haemoccult, and weight loss were unaffected by exercise and there was no difference between the APNKO and WT mice (p > 0.05 except on day 39. However, the clinical symptoms of the DSS-treated APNKO mice were worse than WT mice treated with DSS and had increased susceptibility to intestinal inflammation due to increased local STAT3 activation, higher IL-6, TNF-α, IL-1β and IL-10 levels, and as a result had increased intestinal epithelial cell proliferation (p  Conclusions Exercise training may contribute in alleviating the symptoms of acute colitis and APN deficiency may exacerbate the intestinal inflammation in DSS-induced colitis.

  5. Gene molecular analysis and Adiponectin expression in professional Water Polo players.

    Nigro, Ersilia; Sangiorgio, Dino; Scudiero, Olga; Monaco, Maria Ludovica; Polito, Rita; Villone, Giovanni; Daniele, Aurora

    2016-05-01

    Metabolic Syndrome prevalence has reaching epidemic proportions worldwide. Adiponectin (Acrp30), and in particular its High Molecular Weight (HMW) oligomers, contributes to enhance insulin sensitivity and to reduce inflammation levels. Physical exercise improves body's biochemical balance and metabolism resulting effective in prevention of metabolic diseases. Whether improvement of metabolic features mediated by physical exercise is associated with changes in Acrp30 serum composition is not yet clarified. In the present study, we investigated total Acrp30 expression, its oligomeric status and genetic variants in adiponectin gene (ACDC) in twenty-two professional Water Polo (WP) Players and 40 age- and sex-matched controls. Anthropometric, metabolic parameters and total Acrp30 were assessed; Acrp30 oligomeric profile was characterized by Western blot as well as by FPLC analysis. ACDC gene was analyzed by direct-sequencing analysis. Significant elevated body mass index, aspartate aminotransferase and lactate dehydrogenase levels and, conversely, significantly lower concentrations of total and cholesterol low density lipoprotein were present in WP players. No significant difference was found in total Acrp30 and/or HMW oligomers. Interestingly, in WP players, a direct relationship between total Acrp30 and monocytes as well as an inverse relationship between total Acrp30 and AST levels were found. ACDC screening revealed previously described SNPs. In conclusion, our study confirms the long-term beneficial effects of high physical training on metabolism and suggests that they are not associated with Acrp30 and/or HMW oligomers changes. Moreover, the correlation of Acrp30 with monocytes in WP athletes could represent a mechanism by which Acrp30 participates in exercise-induced anti-inflammatory functions and/or cardiovascular health. PMID:26970705

  6. Interdisciplinary therapy changes superoxide dismutase activity and adiponectin in obese adolescents: a randomised controlled trial.

    Nunes, João Elias Dias; Cunha, Heitor Santos; Freitas, Zulmária Rezende; Nogueira, Ana Maria Caixeta; Dâmaso, Ana Raimunda; Espindola, Foued Salmen; Cheik, Nadia Carla

    2016-05-01

    The objective of this study is to evaluate the effect of interdisciplinary therapy in the parameters of the oxidative stress and the anti-inflammatory responses of obese adolescents. We selected 57 participants, who were randomly divided into 2 groups: interdisciplinary therapy group and a control group. After 6 months of intervention, 17 participants of the interdisciplinary therapy group and 8 of the control group returned for re-evaluation. The interdisciplinary therapy group participated in a treatment with 4 weekly sessions of exercise, a weekly group therapy session and a weekly nutritional education session. Blood parameters of oxidative stress and anti-inflammatory response were evaluated. The results demonstrated that there were significant increases in the interdisciplinary therapy group for superoxide dismutase activity (6.56 ± 3.22 to 11.40 ± 7.49) and ferric-reducing antioxidant potential concentration (532.91 ± 106.48 to 573.25 ± 112.57), although adiponectin levels did not reduce (40.9 ± 29.34 to 49.05 ± 41.22). A significant decrease in nitrite levels was also found (14.23 ± 8.48 to 11.45 ± 6.05). In the control group, significant reduction was found in adiponectin (31.56 ± 18.88 to 18.01 ± 11.66). This study suggests that interdisciplinary therapy for 6 months was effective in improving the anti-inflammatory responses and the antioxidant defences in obese adolescents. PMID:26367325

  7. Effect of adiponectin deficiency on intestinal damage and hematopoietic responses of mice exposed to gamma radiation

    Ponemone, Venkatesh; Fayad, Raja; Gove, Melissa E.; Pini, Maria [Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612 (United States); Fantuzzi, Giamila, E-mail: giamila@uic.edu [Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612 (United States)

    2010-08-07

    Adiponectin (APN) is an adipose tissue-derived cytokine that regulates insulin sensitivity and inflammation. It is also involved in modulation of cell proliferation by binding to various growth factors. Based on its known effects in modulating cell proliferation and oxidative stress, APN may potentially be involved in regulating tissue damage and repair following irradiation. Adiponectin KO mice and their WT littermates were exposed to a single whole-body dose of 3 or 6 Gy gamma radiation. Radiation-induced alterations were studied in jejunum, blood, bone marrow and thymus at days 1 and 5 post-irradiation and compared with sham-irradiated groups. In WT mice, irradiation did not significantly alter serum APN levels while inducing a significant decrease in serum leptin. Irradiation caused a significant reduction in thymocyte cellularity, with concomitant decrease in CD4{sup +}, CD8{sup +} and CD4{sup +}CD8{sup +} T cell populations, with no significant differences between WT and APN KO mice. Irradiation resulted in a significantly higher increase in the frequency of micronucleated reticulocytes in the blood of APN KO compared with WT mice, whereas frequency of micronucleated normochromatic erythrocytes in the bone marrow at day 5 was significantly higher in WT compared with APN KO mice. Finally, irradiation induced similar alterations in villus height and crypt cell proliferation in the jejunum of WT and APN KO mice. Jejunum explants from sham-irradiated APN KO mice produced higher levels of IL-6 compared with tissue from WT animals, but the difference was no longer apparent following irradiation. Our data indicate that APN deficiency does not play a significant role in modulating radiation-induced gastrointestinal injury in mice, while it may participate in regulation of damage to the hematopoietic system.

  8. Effect of adiponectin deficiency on intestinal damage and hematopoietic responses of mice exposed to gamma radiation

    Adiponectin (APN) is an adipose tissue-derived cytokine that regulates insulin sensitivity and inflammation. It is also involved in modulation of cell proliferation by binding to various growth factors. Based on its known effects in modulating cell proliferation and oxidative stress, APN may potentially be involved in regulating tissue damage and repair following irradiation. Adiponectin KO mice and their WT littermates were exposed to a single whole-body dose of 3 or 6 Gy gamma radiation. Radiation-induced alterations were studied in jejunum, blood, bone marrow and thymus at days 1 and 5 post-irradiation and compared with sham-irradiated groups. In WT mice, irradiation did not significantly alter serum APN levels while inducing a significant decrease in serum leptin. Irradiation caused a significant reduction in thymocyte cellularity, with concomitant decrease in CD4+, CD8+ and CD4+CD8+ T cell populations, with no significant differences between WT and APN KO mice. Irradiation resulted in a significantly higher increase in the frequency of micronucleated reticulocytes in the blood of APN KO compared with WT mice, whereas frequency of micronucleated normochromatic erythrocytes in the bone marrow at day 5 was significantly higher in WT compared with APN KO mice. Finally, irradiation induced similar alterations in villus height and crypt cell proliferation in the jejunum of WT and APN KO mice. Jejunum explants from sham-irradiated APN KO mice produced higher levels of IL-6 compared with tissue from WT animals, but the difference was no longer apparent following irradiation. Our data indicate that APN deficiency does not play a significant role in modulating radiation-induced gastrointestinal injury in mice, while it may participate in regulation of damage to the hematopoietic system.

  9. Effects of high levels of glucose on the steroidogenesis and the expression of adiponectin receptors in rat ovarian cells

    Ramé Christelle

    2008-03-01

    Full Text Available Abstract Background Reproductive dysfunction in the diabetic female rat is associated with altered folliculogenesis and steroidogenesis. However, the molecular mechanisms involved in the reduction of steroid production have not been described. Adiponectin is an adipocytokine that has insulin-sensitizing actions including stimulation of glucose uptake in muscle and suppression of glucose production in liver. Adiponectin acts via two receptor isoforms – AdipoR1 and AdipoR2 – that are regulated by hyperglycaemia and hyperinsulinaemia in liver and muscle. We have recently identified AdipoR1 and AdipoR2 in rat ovary. However, their regulation in ovaries of diabetic female rat remains to be elucidated. Methods We incubated rat primary granulosa cells in vitro with high concentrations of glucose (5 or 10 g/l + or - FSH (10-8 M or IGF-1 (10-8 M, and we studied the ovaries of streptozotocin-induced diabetic rats (STZ in vivo. The levels of oestradiol and progesterone in culture medium and serum were measured by RIA. We used immunoblotting to assay key steroidogenesis factors (3beta HSD, p450scc, p450 aromatase, StAR, and adiponectin receptors and various elements of signalling pathways (MAPK ERK1/2 and AMPK in vivo and in vitro. We also determined cell proliferation by [3H] thymidine incorporation. Results Glucose (5 or 10 g/l impaired the in vitro production in rat granulosa cells of both progesterone and oestradiol in the basal state and in response to FSH and IGF-1 without affecting cell proliferation and viability. This was associated with substantial reductions in the amounts of 3beta HSD, p450scc, p450 aromatase and StAR proteins and MAPK ERK1/2 phosphorylation. In contrast, glucose did not affect the abundance of AdipoR1 or AdipoR2 proteins. In vivo, as expected, STZ treatment of rats caused hyperglycaemia and insulin, adiponectin and resistin deficiencies. Plasma progesterone and oestradiol levels were also reduced in STZ rats. However, the

  10. ω-3 Polyunsaturated fatty acids prevent pressure overload-induced ventricular dilation and decrease in mitochondrial enzymes despite no change in adiponectin

    O'Shea Karen M

    2010-09-01

    Full Text Available Abstract Background Pathological left ventricular (LV hypertrophy frequently progresses to dilated heart failure with suppressed mitochondrial oxidative capacity. Dietary marine ω-3 polyunsaturated fatty acids (ω-3 PUFA up-regulate adiponectin and prevent LV dilation in rats subjected to pressure overload. This study 1 assessed the effects of ω-3 PUFA on LV dilation and down-regulation of mitochondrial enzymes in response to pressure overload; and 2 evaluated the role of adiponectin in mediating the effects of ω-3 PUFA in heart. Methods Wild type (WT and adiponectin-/- mice underwent transverse aortic constriction (TAC and were fed standard chow ± ω-3 PUFA for 6 weeks. At 6 weeks, echocardiography was performed to assess LV function, mice were terminated, and mitochondrial enzyme activities were evaluated. Results TAC induced similar pathological LV hypertrophy compared to sham mice in both strains on both diets. In WT mice TAC increased LV systolic and diastolic volumes and reduced mitochondrial enzyme activities, which were attenuated by ω-3 PUFA without increasing adiponectin. In contrast, adiponectin-/- mice displayed no increase in LV end diastolic and systolic volumes or decrease in mitochondrial enzymes with TAC, and did not respond to ω-3 PUFA. Conclusion These findings suggest ω-3 PUFA attenuates cardiac pathology in response to pressure overload independent of an elevation in adiponectin.

  11. Aldehyde oxidase 1 is highly abundant in hepatic steatosis and is downregulated by adiponectin and fenofibric acid in hepatocytes in vitro

    Adiponectin protects the liver from steatosis caused by obesity or alcohol and therefore the influence of adiponectin on human hepatocytes was analyzed. GeneChip experiments indicated that recombinant adiponectin downregulates aldehyde oxidase 1 (AOX1) expression and this was confirmed by real-time RT-PCR and immunoblot. AOX1 is a xenobiotic metabolizing protein and produces reactive oxygen species (ROS), that promote cell damage and fibrogenesis. Adiponectin and fenofibric acid activate peroxisome proliferator-activated receptor-α (PPAR-α) and both suppress AOX1 protein and this is blocked by the PPAR-α antagonist RU486. Obesity is associated with low adiponectin, reduced hepatic PPAR-α activity and fatty liver, and AOX1 was found induced in the liver of rats on a high-fat diet when compared to controls. Free fatty acids and leptin, that are elevated in obesity, failed to upregulate AOX1 in vitro. The current data indicate that adiponectin reduces AOX1 by activating PPAR-α whereas fatty liver disease is associated with elevated hepatic AOX1. High AOX1 may be associated with higher ROS well described to induce fibrogenesis in liver tissue but may also influence drug metabolism and activity

  12. A comprehensive analysis of adiponectin QTLs using SNP association, SNP cis-effects on peripheral blood gene expression and gene expression correlation identified novel metabolic syndrome (MetS) genes with potential role in carcinogenesis and systemic inflammation

    Zhang, Yi; Kent, Jack W; Olivier, Michael; ALI Omar; Cerjak, Diana; Broeckel, Ulrich; Abdou, Reham M; Dyer, Thomas D.; Comuzzie, Anthony; Curran, Joanne E.; Carless, Melanie A.; Rainwater, David L.; Göring, Harald H. H.; Blangero, John; Kissebah, Ahmed H.

    2013-01-01

    Background Metabolic syndrome (MetS) is an aberration associated with increased risk for cancer and inflammation. Adiponectin, an adipocyte-produced abundant protein hormone, has countering effect on the diabetogenic and atherogenic components of MetS. Plasma levels of adiponectin are negatively correlated with onset of cancer and cancer patient mortality. We previously performed microsatellite linkage analyses using adiponectin as a surrogate marker and revealed two QTLs on chr5 (5p14) and c...

  13. Fat cell-secreted adiponectin mediates physical exercise-induced hippocampal neurogenesis:an alternative anti-depressive treatment?

    Suk Yu Yau; Ang Li; Aimin Xu; Kwok-fai So

    2015-01-01

    Psychological depression is drawing accumulating attention nowadays, due to the skyrocketing incidence worldwide and the enormous burdens it incurs. Physical exercise has been long recog-nized for its therapeutic effects on depressive disorders, although knowledge of the underlying mechanisms remains limited. Suppressed hippocampal neurogenesis in adult brains has been regarded, at least partly, contributive to depression, whereas physical exercise that restores neuro-genesis accordingly exerts the anti-depressive action. Several recent publications have suggested the potential role of adiponectin, a protein hormone secreted by peripheral mature adipocytes, in mediating physical exercise-triggered enhancement of hippocampal neurogenesis and alleviation of depression. Here, we brielfy review these novel ifndings and discuss the possibility of counter-acting depression by modulating adiponectin signaling in the hippocampus with interventions including physical exercise and administration of pharmacological agents.

  14. Role of the Peroxisome Proliferator-Activated Receptors, Adenosine Monophosphate-Activated Kinase, and Adiponectin in the Ovary

    Joëlle Dupont

    2008-01-01

    Full Text Available The mechanisms controlling the interaction between energy balance and reproduction are the subject of intensive investigations. The integrated control of these systems is probably a multifaceted phenomenon involving an array of signals governing energy homeostasis, metabolism, and fertility. Two fuel sensors, PPARs, a superfamily of nuclear receptors and the kinase AMPK, integrate energy control and lipid and glucose homeostasis. Adiponectin, one of the adipocyte-derived factors mediate its actions through the AMPK or PPARs pathway. These three molecules are expressed in the ovary, raising questions about the biological actions of fuel sensors in fertility and the use of these molecules to treat fertility problems. This review will highlight the expression and putative role of PPARs, AMPK, and adiponectin in the ovary, particularly during folliculogenesis, steroidogenesis, and oocyte maturation.

  15. Ascofuranone stimulates expression of adiponectin and peroxisome proliferator activated receptor through the modulation of mitogen activated protein kinase family members in 3T3-L1, murine pre-adipocyte cell line

    Highlights: ► Ascofuranone increases expression of adiponectin and PPARγ. ► Inhibitors for MEK and JNK increased the expression of adiponectin and PPARγ. ► Ascofuranone significantly suppressed phosho-ERK, while increasing phospho-p38. -- Abstract: Ascofuranone, an isoprenoid antibiotic, was originally isolated as a hypolipidemic substance from a culture broth of the phytopathogenic fungus, Ascochyta visiae. Adiponectin is mainly synthesized by adipocytes. It relieves insulin resistance by decreasing the plasma triglycerides and improving glucose uptake, and has anti-atherogenic properties. Here, we found that ascofuranone increases expression of adiponectin and PPARγ, a major transcription factor for adiponectin, in 3T3-L1, murine pre-adipocytes cell line, without promoting accumulation of lipid droplets. Ascofuranone induced expression of adiponectin, and increases the promoter activity of adiponectin and PPRE, PPAR response element, as comparably as a PPARγ agonist, rosiglitazone, that stimulates lipid accumulation in the preadipocyte cell line. Moreover, inhibitors for MEK and JNK, like ascofuranone, considerably increased the expression of adiponectin and PPARγ, while a p38 inhibitor significantly suppressed. Ascofuranone significantly suppressed ERK phosphorylation, while increasing p38 phosphorylation, during adipocyte differentiation program. These results suggest that ascofuranone regulates the expression of adiponectin and PPARγ through the modulation of MAP kinase family members.

  16. Ascofuranone stimulates expression of adiponectin and peroxisome proliferator activated receptor through the modulation of mitogen activated protein kinase family members in 3T3-L1, murine pre-adipocyte cell line

    Chang, Young-Chae, E-mail: ycchang@cu.ac.kr [Research Institute of Biomedical Engineering and Department of Medicine, Catholic University of Daegu School of Medicine, Daegu 705-718 (Korea, Republic of); Cho, Hyun-Ji, E-mail: hjcho.dr@gmail.com [Research Institute of Biomedical Engineering and Department of Medicine, Catholic University of Daegu School of Medicine, Daegu 705-718 (Korea, Republic of)

    2012-06-08

    Highlights: Black-Right-Pointing-Pointer Ascofuranone increases expression of adiponectin and PPAR{gamma}. Black-Right-Pointing-Pointer Inhibitors for MEK and JNK increased the expression of adiponectin and PPAR{gamma}. Black-Right-Pointing-Pointer Ascofuranone significantly suppressed phosho-ERK, while increasing phospho-p38. -- Abstract: Ascofuranone, an isoprenoid antibiotic, was originally isolated as a hypolipidemic substance from a culture broth of the phytopathogenic fungus, Ascochyta visiae. Adiponectin is mainly synthesized by adipocytes. It relieves insulin resistance by decreasing the plasma triglycerides and improving glucose uptake, and has anti-atherogenic properties. Here, we found that ascofuranone increases expression of adiponectin and PPAR{gamma}, a major transcription factor for adiponectin, in 3T3-L1, murine pre-adipocytes cell line, without promoting accumulation of lipid droplets. Ascofuranone induced expression of adiponectin, and increases the promoter activity of adiponectin and PPRE, PPAR response element, as comparably as a PPAR{gamma} agonist, rosiglitazone, that stimulates lipid accumulation in the preadipocyte cell line. Moreover, inhibitors for MEK and JNK, like ascofuranone, considerably increased the expression of adiponectin and PPAR{gamma}, while a p38 inhibitor significantly suppressed. Ascofuranone significantly suppressed ERK phosphorylation, while increasing p38 phosphorylation, during adipocyte differentiation program. These results suggest that ascofuranone regulates the expression of adiponectin and PPAR{gamma} through the modulation of MAP kinase family members.

  17. Genetic variants in adiponectin and blood pressure responses to dietary sodium or potassium interventions: a family-based association study.

    Chu, C; Wang, Y; Ren, K-Y; Yan, D-Y; Guo, T-S; Zheng, W-L; Yuan, Z-Y; Mu, J-J

    2016-09-01

    Previous studies have shown that genetic factors might have an important role in blood pressure (BP) responses to dietary salt or potassium intake. The aim of this study was to assess the association of common genetic variants of the adiponectin gene with BP responses to controlled dietary sodium or potassium interventions. Subjects (n=334) from 124 families in rural areas of Northern China were recruited. After a 3-day baseline observation, participants sequentially maintained a 7-day low-sodium diet (NaCl, 3 g per day; or sodium, 51.3 mmol per day), followed by a 7-day high-sodium diet (NaCl, 18 g per day; or sodium, 307.8 mmol per day) and a 7-day high-sodium plus potassium supplementation intervention (KCl, 4.5 g per day; or potassium, 60 mmol per day). A total of seven single nucleotide polymorphisms (SNPs) in the adiponectin gene were selected as the study sites. After adjustment for multiple testing, the adiponectin SNP rs16861205 was significantly associated with the diastolic BP (DBP) response to low-salt intervention, and the DBP and mean arterial pressure (MAP) responses to high-salt intervention (P=0.028, 0.023 and 0.027, respectively). SNP rs822394 was associated with the DBP and MAP responses to low-salt intervention and the DBP response to high-salt intervention (P=0.023, 0.030 and 0.033 respectively). Meanwhile, significant association also existed between SNP rs16861194 and the systolic BP response to potassium supplementation intervention (P=0.026). In addition, SNP rs822394 was significantly associated with basal DBP after adjustment for multiple testing (P=0.033). Our study indicated that the genetic polymorphisms in the adiponectin gene are significantly associated with BP responses to dietary sodium and potassium intake. PMID:27011258

  18. Adiponectin and Its Receptors in the Ovary: Further Evidence for a Link between Obesity and Hyperandrogenism in Polycystic Ovary Syndrome

    Fabio V Comim; Kate Hardy; Stephen Franks

    2013-01-01

    Polycystic ovary syndrome (PCOS), characterized by ovarian androgen excess, is the commonest endocrine disorder in women. Obesity increases androgen synthesis, a phenomenon attributed to the accompanying hyperinsulinemia. Our hypothesis was that adipokines, fat cell-derived hormones, play a direct role in modulating ovarian androgen secretion. Therefore, the aims of this study were to explore the effects of adipokines (in particular, adiponectin) on ovarian steroidogenesis and compare the exp...

  19. The Role of Novel Biomarkers of Cardiovascular Disease in Chronic Kidney Disease: Focus on Adiponectin and Leptin

    Kaisar, Omar M; David W. Johnson; Prins, Judith B; Isbel, Nicole

    2008-01-01

    Cardiovascular disease (CVD) remains a major cause of premature death in patients with chronic kidney disease (CKD), including renal transplant recipients. Both interplay of traditional cardiovascular and renal specific risk factors have been shown to be associated with an increased risk of cardiovascular death in patients with CKD. Recently, there has been great interest in the role of novel biomarkers, in particular adiponectin and leptin, and its association with CVD in the CKD population....

  20. Differentiation of human adipocytes at physiological oxygen levels results in increased adiponectin secretion and isoproterenol-stimulated lipolysis

    Famulla, Susanne; Schlich, Raphaela; Sell, Henrike; Eckel, Jürgen

    2012-01-01

    Adipose tissue (AT) hypoxia occurs in obese humans and mice. Acute hypoxia in adipocytes causes dysregulation of adipokine secretion with an increase in inflammatory factors and diminished adiponectin release. O2 levels in humans range between 3 and 11% revealing that conventional in vitro culturing at ambient air and acute hypoxia treatment (1% O2) are performed under non-physiological conditions. In this study, we mimicked physiological conditions by differentiating human primary adipocytes...

  1. Association between SNP and haplotypes in PPARGCl and adiponectin genes and bone mineral density in Chinese nuclear families

    Zhen-lin ZHANG; Jin-wei HE; Yue-juan QIN; Yun-qiu HU; Miao LI; Yu-juan LIU; Hao ZHANG; Wei-wei HU

    2007-01-01

    Aim: To assess the contribution of single nucleotide polymorphisms (SNP) and haplotypes in the peroxisome proliferator-activated receptor-γ co-activator-1(PPARGC1) and adiponectin genes to normal bone mineral density (BMD) variation in healthy Chinese women and men. Methods: We performed population-based (ANOVA) and family-based (quantitative trait locus transmission disequi-librium test) association studies of PPARGC1 and adiponectin genes. SNP in the 2 genes were genotyped. BMD was measured using dual-energy X-ray absorptiometry in the lumbar spine and hip in 401 nuclear families with a total of1260 subjects, including 458 premenopausal women, 20-40 years of age; 401 post-menopausal women (mothers), 43-74 years of age; and 401 men (fathers), 49-76years of age. Results: Significant within-family association was found between the Thr394Thr polymorphism in the PPGAGC1 gene and peak BMD in the femoral neck (P=0.026). Subsequent permutations were in agreement with this significant within-family association result (P=0.016), but Thr394Thr SNP only accounted for0.7% of the variation in femoral neck peak BMD. However, no significant within-family association was detected between each SNP in the adiponect in gene and peak BMD. Although no significant association was found between BMD and SNP in the PPARGC1 and adiponectin genes in both men and postmenopausal women, haplotype 2 (T-T) in the adiponect in gene was associated with lumbar spine BMD in postmenopausal women (P=0.019). Conclusion: Our findings sug-gest that Thr394Thr SNP in the PPARGC1 gene was associated with peak BMD in the femoral neck in Chinese women. Confirmation of our results is needed in other populations and with more functional markers within and flanking the PPARGC1 or adiponectin genes region.

  2. Additive Regulation of Adiponectin Expression by the Mediterranean Diet Olive Oil Components Oleic Acid and Hydroxytyrosol in Human Adipocytes

    Egeria Scoditti; Marika Massaro; Maria Annunziata Carluccio; Mariangela Pellegrino; Martin Wabitsch; Nadia Calabriso; Carlo Storelli; Raffaele De Caterina

    2015-01-01

    Adiponectin, an adipocyte-derived insulin-sensitizing and anti-inflammatory hormone, is suppressed in obesity through mechanisms involving chronic inflammation and oxidative stress. Olive oil consumption is associated with beneficial cardiometabolic actions, with possible contributions from the antioxidant phenol hydroxytyrosol (HT) and the monounsaturated fatty acid oleic acid (OA, 18:1n-9 cis), both possessing anti-inflammatory and vasculo-protective properties. We determined the effects of...

  3. Lower leptin/adiponectin ratio and risk of rapid lung function decline in chronic obstructive pulmonary disease

    Suzuki, Masaru; Makita, Hironi; Östling, Jörgen;

    2014-01-01

    compared with the Hokkaido COPD cohort study. There were no significant associations between lung function decline and adipokine levels in subjects without airflow limitation. CONCLUSIONS: A lower leptin/adiponectin ratio was associated with lung function decline in patients with COPD in two independent...... Japanese and Western cohort studies of populations of different ethnicity. Measure of systemic adipokines may provide utility in predicting patients with COPD at higher risk of lung function decline....

  4. Pathway-Based Genome-wide Association Studies Reveal That the Rac1 Pathway Is Associated with Plasma Adiponectin Levels

    Wei-Dong Li; Hongxiao Jiao; Kai Wang; Fuhua Yang; Grant, Struan F.A.; Hakon Hakonarson; Rexford Ahima; R. Arlen Price

    2015-01-01

    Pathway-based analysis as an alternative and effective approach to identify disease-related genes or loci has been verified. To decipher the genetic background of plasma adiponectin levels, we performed genome wide pathway-based association studies in extremely obese individuals and normal-weight controls. The modified Gene Set Enrichment Algorithm (GSEA) was used to perform the pathway-based analyses (the GenGen Program) in 746 European American females, which were collected from our previou...

  5. Genetic variants in adiponectin and blood pressure responses to dietary sodium or potassium interventions: a family-based association study

    Chu, C; Wang, Y; Ren, K-y; Yan, D-y; Guo, T-s; Zheng, W-l; Yuan, Z-y; Mu, J-j

    2016-01-01

    Previous studies have shown that genetic factors might have an important role in blood pressure (BP) responses to dietary salt or potassium intake. The aim of this study was to assess the association of common genetic variants of the adiponectin gene with BP responses to controlled dietary sodium or potassium interventions. Subjects (n=334) from 124 families in rural areas of Northern China were recruited. After a 3-day baseline observation, participants sequentially maintained a 7-day low-sodium diet (NaCl, 3 g per day; or sodium, 51.3 mmol per day), followed by a 7-day high-sodium diet (NaCl, 18 g per day; or sodium, 307.8 mmol per day) and a 7-day high-sodium plus potassium supplementation intervention (KCl, 4.5 g per day; or potassium, 60 mmol per day). A total of seven single nucleotide polymorphisms (SNPs) in the adiponectin gene were selected as the study sites. After adjustment for multiple testing, the adiponectin SNP rs16861205 was significantly associated with the diastolic BP (DBP) response to low-salt intervention, and the DBP and mean arterial pressure (MAP) responses to high-salt intervention (P=0.028, 0.023 and 0.027, respectively). SNP rs822394 was associated with the DBP and MAP responses to low-salt intervention and the DBP response to high-salt intervention (P=0.023, 0.030 and 0.033 respectively). Meanwhile, significant association also existed between SNP rs16861194 and the systolic BP response to potassium supplementation intervention (P=0.026). In addition, SNP rs822394 was significantly associated with basal DBP after adjustment for multiple testing (P=0.033). Our study indicated that the genetic polymorphisms in the adiponectin gene are significantly associated with BP responses to dietary sodium and potassium intake. PMID:27011258

  6. Lipoprotein Particles, Insulin, Adiponectin, C-Reactive Protein and Risk of Coronary Heart Disease among Men with Metabolic Syndrome

    Kuller, Lewis H; Grandits, Gregory; Cohen, Jerome D.; Neaton, James D.; Ronald, Prineas

    2006-01-01

    We tested the hypotheses whether nuclear magnetic resonance (NMR) determined lipoprotein particles, insulin and adiponectin, and C-reactive protein (CRP) and white blood cell (WBC) count as markers of inflammation predicted risk of coronary heart disease (CHD) death among 428 men age 35–57 years with metabolic syndrome (MetSyn) in a matched case control study within the Multiple Risk Factor Intervention Trial.

  7. Dietary ω-3 polyunsaturated fatty acids decrease retinal neovascularization by adipose–endoplasmic reticulum stress reduction to increase adiponectin1234

    Fu, Zhongjie; Lofqvist, Chatarina A; Shao, Zhuo; Sun, Ye; Joyal, Jean-Sebastien; Hurst, Christian G.; Cui, Ricky Z; Evans, Lucy P.; Tian, Katherine; SanGiovanni, John Paul; Chen, Jing; Ley, David; Hansen Pupp, Ingrid; Hellstrom, Ann; Smith, Lois EH

    2015-01-01

    Background: Retinopathy of prematurity (ROP) is a vision-threatening disease in premature infants. Serum adiponectin (APN) concentrations positively correlate with postnatal growth and gestational age, important risk factors for ROP development. Dietary ω-3 (n–3) long-chain polyunsaturated fatty acids (ω-3 LCPUFAs) suppress ROP and oxygen-induced retinopathy (OIR) in a mouse model of human ROP, but the mechanism is not fully understood.

  8. Adiponectin inhibits oxidized low density lipoprotein-induced increase in matrix metalloproteinase 9 expression in vascular smooth muscle cells

    Saneipour, Maryam; Ghatreh-Samani, Keihan; Heydarian, Esfandiar; Farrokhi, Effat; Abdian, Narges

    2015-01-01

    BACKGROUND High expression of matrix metalloproteinase 9 (MMP9) during vascular injury and inflammation plays an important role in atherosclerotic plaque formation and rupture. In the process of atherosclerosis, oxidized low-density lipoprotein (oxLDL) upregulates MMP9 in human aortic vascular smooth muscle cells (HA/VSMCs). Adiponectin is an adipose tissue-derived hormone that has been shown to exert anti-atherogenic and anti-inflammatory effects. The aim of this study was to investigate the...

  9. N-acetylcysteine and allopurinol synergistically enhance cardiac adiponectin content and reduce myocardial reperfusion injury in diabetic rats

    Tingting Wang; Shigang Qiao; Shaoqing Lei; Yanan Liu; Kwok F J Ng; Aimin Xu; Karen S L Lam; Irwin, Michael G; Zhengyuan Xia

    2011-01-01

    Background: Hyperglycemia-induced oxidative stress plays a central role in the development of diabetic myocardial complications. Adiponectin (APN), an adipokine with anti-diabetic and anti-ischemic effects, is decreased in diabetes. It is unknown whether or not antioxidant treatment with N-acetylcysteine (NAC) and/or allopurinol (ALP) can attenuate APN deficiency and myocardial ischemia reperfusion (MI/R) injury in the early stage of diabetes. Methodology/Principal Findings: Control or strept...

  10. Body Composition and Circulating High-Molecular-Weight Adiponectin and IGF-I in Infants Born Small for Gestational Age

    Zegher, Francis de; Sebastiani, Giorgia; Diaz, Marta; Sánchez-Infantes, David; Lopez-Bermejo, Abel; Ibáñez, Lourdes

    2012-01-01

    Prenatal growth restraint, if followed by postnatal overweight, confers risk for adult disease including diabetes. The mechanisms whereby neonatal nutrition may modulate such risk are poorly understood. We studied the effects of nutrition (breast-feeding [BRF] vs. formula-feeding [FOF]) on weight partitioning and endocrine state (as judged by high-molecular-weight [HMW] adiponectin and IGF-I) of infants born small for gestational age (SGA). Body composition (by absorptiometry), HMW adiponecti...

  11. Pre-diagnostic levels of adiponectin and soluble vascular cell adhesion molecule-1 are associated with colorectal cancer risk

    Mathilde Touvier; Pilar Galan; Sébastien Czernichow; Léopold Fezeu; Namanjeet Ahluwalia; Chantal Julia; Nathalie Charnaux; Angela Sutton; Caroline Méjean; Paule Latino-Martel; Serge Hercberg

    2012-01-01

    AIM:To examine the relationships between pre-diag-nostic biomarkers and colorectal cancer risk and assess their relevance in predictive models.METHODS:A nested case-control study was designed to include all first primary incident colorectal cancer cases diagnosed between inclusion in the SUpplementation en VItamines et Minéraux AntioXydants cohort in 1994 and the end of follow-up in 2007.Cases (n =50) were matched with two randomly selected controis (n =100).Conditional logistic regression models were used to investigate the associations between prediagnostic levels of hs-CRP,adiponectin,leptin,soluble vascular cell adhesion molecule-1 (sVCAM-1),soluble intercellular adhesion molecule-1,E-selectin,monocyte chemoattractant protein-1 and colorectal cancer risk.Area under the receiver operating curves (AUC) and relative integrated discrimination improvement (RIDI) statistics were used to assess the discriminatory poten tial of the models.RESULTS:Plasma adiponectin level was associated with decreased colorectal cancer risk (P for linear trend =0.03).Quartiles of sVCAM-1 were associated with increased colorectal cancer risk (P for linear trend =0.02).No association was observed with any of the other biomarkers.Compared to standard models with known risk factors,those including both adiponectin and sVCAM-1 had substantially improved performance for colorectal cancer risk prediction (P for AUC improvement =0.01,RIDI =26.5%).CONCLUSION:These results suggest that pre-diagnostic plasma adiponectin and sVCAM-1 levels are associated with decreased and increased colorectal cancer risk,respectively.These relationships must be confirmed in large validation studies.

  12. Elevated Adiponectin Antibody Levels in Sera of Patients with Atherosclerosis- related Coronary Artery Disease, Cerebral Infarction and Diabetes Mellitus

    Takaki Hiwasa

    2016-04-01

    (AlphaLISA method. The results revealed that the anti‐ body levels were significantly higher in patients with CAD, CI and type 2 DM, than in healthy donors. Receiver operating curve analysis showed that the sensitivity was in a range of 41–48% for CAD, CI and DM. Thus, the serum anti-adiponectin antibody levels could be a common marker for atherosclerosis-related diseases.

  13. Polyunsaturated fatty acids of marine origin induce a metabolic switch and stimulate adiponectin release in white fat

    Kopecký, Jan; Flachs, Pavel; Horáková, Olga; Pecina, Petr; Franssen-van Hal, N.; Rossmeisl, Martin; Brauner, Petr; Keijer, J.; Mohamed-Ali, V.; Houštěk, Josef

    2006-01-01

    Roč. 7, č. S2 (2006), s. 120-121. ISSN 1467-7881. [International Congress on Obesity (ICO) /10./. 03.09.2006-08.09.2006, Sydney] R&D Projects: GA ČR GA303/05/2580; GA MŠk(CZ) 1M0520 Institutional research plan: CEZ:AV0Z50110509 Keywords : adiponectin * adipose tissue * C57BL/6J mice * n-3 PUFA * mitochodnria Subject RIV: FB - Endocrinology, Diabetology, Metabolism, Nutrition

  14. Effect of 8 Weeks of High Intensity Interval Training on Plasma Levels of Adiponectin and Leptin in Overweight Nurses

    Sahar Avazpor

    2016-07-01

    Full Text Available Background: High intensity interval training (HIIT is a novel training method which has received most attention in recent years. The aim of this study was to examine the effect of 8 weeks of high intensity interval training (HIIT on plasma levels of adiponectin and leptin in overweight nurses.Materials and Methods: 27 nurses (mean age 25.81±60 years, height 158.01±67 cm and weight 69.41±25 kg were voluntarily selected and randomly assigned to three groups (each group 9 subjects: 1. HIIT (type 1 including 8 seconds of sprint running and 12 seconds of active recovery 2. HIIT (type 2 including 40-m shuttle run with maximum speed 3. Control group. HIIT (type 1 was performed for eight weeks, three sessions per week, each session 6-9 min. With more than 90% HRmax. HIIT (type 2 was applied for eight weeks, three sessions per week with more than 90% HRmax. The control group did not participate in any training protocol.Results: The data were analyzed by the dependent t test and ANOVA. The results showed that the HIIT (type 1 and (type 2 had significant effects on plasma leptin decrease and plasma adiponectin concentration increase in nurses. One-way analysis of variance (ANOVA was used to analyze the intergroup data at p˂0.05.Conclusion: The results showed a significant difference in the variables (leptin and adiponectin among HIIT (type 1, HIIT (type 2 and control.

  15. A Moderate Low-Carbohydrate Low-Calorie Diet Improves Lipid Profile, Insulin Sensitivity and Adiponectin Expression in Rats

    Jie-Hua Chen

    2015-06-01

    Full Text Available Calorie restriction (CR via manipulating dietary carbohydrates has attracted increasing interest in the prevention and treatment of metabolic syndrome. There is little consensus about the extent of carbohydrate restriction to elicit optimal results in controlling metabolic parameters. Our study will identify a better carbohydrate-restricted diet using rat models. Rats were fed with one of the following diets for 12 weeks: Control diet, 80% energy (34% carbohydrate-reduced and 60% energy (68% carbohydrate-reduced of the control diet. Changes in metabolic parameters and expressions of adiponectin and peroxisome proliferator activator receptor γ (PPARγ were identified. Compared to the control diet, 68% carbohydrate-reduced diet led to a decrease in serum triglyceride and increases inlow density lipoprotein-cholesterol (LDL-C, high density lipoprotein-cholesterol (HDL-C and total cholesterol; a 34% carbohydrate-reduced diet resulted in a decrease in triglycerides and an increase in HDL-cholesterol, no changes however, were shown in LDL-cholesterol and total cholesterol; reductions in HOMA-IR were observed in both CR groups. Gene expressions of adiponectin and PPARγ in adipose tissues were found proportionally elevated with an increased degree of energy restriction. Our study for the first time ever identified that a moderate-carbohydrate restricted diet is not only effective in raising gene expressions of adiponectin and PPARγ which potentially lead to better metabolic conditions but is better at improving lipid profiles than a low-carbohydrate diet in rats.

  16. Increases in ghrelin and decreases in leptin without altering adiponectin during extreme weight loss in male competitive bodybuilders.

    Mäestu, Jarek; Jürimäe, Jaak; Valter, Ivo; Jürimäe, Toivo

    2008-02-01

    The aim of this study was to investigate responses of ghrelin, leptin, and adiponectin to a weight reduction period of 10 weeks in male subjects with high lean body mass and low body fat values. Fourteen male bodybuilders (7 competitors: 28.3 +/- 10.3 years, 175.3 +/- 5.4 cm, 82.2 +/- 9.3 kg; 7 controls: 22.4 +/- 3.0 years, 182.4 +/- 6.9 cm, 85.3 +/- 10.5 kg) participated in this study. The subjects were tested 3 times: 11 weeks (TEST1), 5 weeks (TEST2), and 3 days (TEST3) before the national championships. Testing procedure included dual-energy x-ray absorptiometry scan; calculation of daily energy intake and expenditure; and venous blood sampling for fasting ghrelin, leptin, and adiponectin. In the competitors' group, a significant (P .05). The pattern of leptin was opposite, with a significant 27.7% decrease at TEST2 and no further decrease at TEST3 (P > .05). No significant change was observed in adiponectin concentration during the study. In the control group, no significant changes in biochemical parameters were observed. In conclusion, ghrelin concentration significantly increases, but is suppressed in conditions of limited energy availability that is accompanied by significant body mass loss in male subjects with initial low body fat values. PMID:18191052

  17. Green tea polyphenols reduced fat deposits in high fat-fed rats via erk1/2-PPARγ-adiponectin pathway.

    Chong Tian

    Full Text Available OBJECTIVE: Hypoadiponectinemia contributes to the development of obesity and related disorders such as diabetes, hyperlipidemia, and cardiovascular diseases. In this study we investigated the effects of green tea polyphenols (GTPs on adiponectin levels and fat deposits in high fat (HF fed rats, the mechanism of signaling pathway was explored as well. METHODS AND RESULTS: Male Wistar rats were fed with high-fat diet. GTPs (0.8, 1.6, 3.2 g/L were administered via drinking water. Serum adiponectin and insulin were measured by ELISA, mRNA levels of adiponectin and PPARγ in visceral adipose tissue (VAT were determined by Real-time PCR, protein levels of PPARγ, phospho (p - PPARγ, extracellular signal regulated kinase (erk 1/2 and p-erk1/2 in VAT were determined by western blot. GTPs treatment attenuated the VAT accumulation, hypoadiponectinemia and the decreased mRNA level of adiponectin in VAT induced by HF. Decreased expression and increased phosphorylation of PPARγ (the master regulator of adiponectin, and increased activation of erk1/2 were observed in HF group, and these effects could be alleviated by GTPs treatment. To explore the underlying mechanism, VAT was cultured in DMEM with high glucose to mimic the hyperglycemia condition in vitro. Similar to the results of in vivo study, decreased adiponectin levels, decreased expression and increased phosphorylation of PPARγ, and elevated erk1/2 phosphorylation in cultured VAT were observed. These effects could be ameliorated by co-treatment with GTPs or PD98059 (a selective inhibitor of erk1/2. CONCLUSION: GTPs reduced fat deposit, ameliorated hypoadiponectinemia in HF-fed rats, and relieved high glucose-induced adiponectin decrease in VAT in vitro. The signaling pathway analysis indicated that PPARγ regulation mediated via erk1/2 pathway was involved.

  18. Adiponectin Levels Are Reduced While Markers of Systemic Inflammation and Aortic Remodelling Are Increased in Intrauterine Growth Restricted Mother-Child Couple

    Silvia Visentin

    2014-01-01

    Full Text Available Aim of the Study. To investigate the relationships between the adipocytokine levels, markers of inflammation, and vascular remodelling in pregnancies complicated by intrauterine growth restriction (IUGR. Materials and Methods. This was a retrospective study. One hundred and forty pregnant patients were enrolled. Adiponectin, leptin, tumor necrosis factor α (TNFα, interleukin-6 (IL-6, and C reactive protein (CRP were assessed in IUGR, small for gestational age (SGA, and appropriate for gestational age (AGA mother-child couples at delivery. IUGR and SGA fetuses were defined as fetuses whose estimated fetal weight (EFW was below 10th percentile for gestational age with and without umbilical artery (UA Doppler abnormalities, respectively. Fetal aorta intima media thickness (aIMT was evaluated by ultrasound in the same fetal groups. Data were analyzed by R (version 2.15.2. Results. There were 37 IUGR mother-child couples, 33 SGA, and 70 AGA. Leptin, TNFα, IL-6, and CRP serum levels were higher in IUGR pregnant patients (P<0.05. Adiponectin levels were significantly reduced in IUGR fetuses compared to SGA and AGA, while leptin, TNFα, and IL-6 levels were higher in IUGR group (P≤0.05. Fetal aIMT was significantly higher in IUGR (P<0.05 and in this group there was a negative correlation between aIMT and adiponectin/leptin ratio (A/L ratio (P<0.05 and between adiponectin and IL-6 levels (P<0.05. Conclusions. In conclusion, compared to SGA and AGA, IUGR fetuses had reduced circulating levels of adiponectin and elevated measures of aIMT and several inflammatory markers. Moreover, adiponectin levels were negatively correlated with aIMT in IUGR fetuses suggesting a possible causal link between reduced adiponectin and vessel remodelling.

  19. Role of adiponectin in liver fibrogenesis: progress in basic and clinical research%脂联素在肝纤维化发生中的作用

    王美娟; 马红

    2011-01-01

    脂联素(ADN)具有多种生物学作用.近年研究表明其可抑制肝纤维化的发展.一些动物实验显示ADN基因敲除(ADN-KO)鼠易发生纤维化,可能与ADN具有抗氧化应激及抗炎作用有关.肝星状细胞(HSC)在肝纤维化中起核心作用,ADN可抑制HSC增殖、迁移,促进其凋亡.临床研究报道ADN与慢性肝病的纤维化进展有关,为肝纤维化的无创性诊断提供新的方向.进一步分析ADN的抗肝纤维化机制有重要意义.%Adiponectin possesses many biological effects. Recent studies have found that adiponectin can inhibit the development of hepatic fibrosis. Some animal experiments demonstrate that adiponectin-knockout (ADN-KO)mice tend to develop severe hepatic fibrosis which may be associated with anti-oxidative stress and anti-inflammatory effects of adiponectin. Hepatic stellate cell (HSC) play a central role in liver fibrogenesis. Studies showed that adiponectin can inhibit proliferation, migration of HSC and promote its apoptosis. Clinical researches also reported that adiponectin was related to progression of hepatic fibrosis in chronic liver diseases, which is a new way for the non-invasive diagnosis of hepatic fibrosis. It is necessary to investigate the precise mechanism of adiponectin on hepatic fibrosis.

  20. Inflammatory adipokines, high molecular weight adiponectin, and insulin resistance: a population-based survey in prepubertal schoolchildren.

    Giuseppe Murdolo

    Full Text Available BACKGROUND: The aim of this study was to investigate sex differences and associations of high molecular weight (HMW adiponectin, leptin and proinflammatory adipokines, individually or in combinations, with adiposity and insulin resistance (IR measures in prepubertal childhood. METHODOLOGY: We studied 305 prepubertal children (boys/girls: 144/161; Tanner stage 1; age: 5-13 yr, included in a cohort of 44,231 adolescents who participated in an extensive Italian school-based survey. According to Cole's criteria, 105 individuals were lean (L; boys/girls: 59/46, 60 overweight (OW; boys/girls: 32/28 and 140 obese (OB; boys/girls: 70/70. Measurements comprised total and HMW adiponectin, leptin, as well as a panel of proinflammatory adipokines/chemokines associated with diabetes risk. PRINCIPAL FINDINGS: Leptin-, and the leptin-to-HMW adiponectin ratio (L/HMW-, increased progressively (p<0.0001 from L to OW to OB boys and girls. When compared with L peers, OW and OB girls exhibited lower (p<0.001 HMW adiponectin levels, while in boys the HMW multimers did not differ significantly across the BMI-stratified groups. OB girls displayed higher (p<0.05 IL-8, IL-18, monocyte chemoattractant protein-1 (MCP-1 and soluble intercellular adhesion molecule-1 levels (sICAM-1 than L girls, whereas increased macrophage migration inhibitory factor (MIF concentrations in OB vs OW boys were seen. HMW adiponectin (negatively, leptin or inflammatory markers (positively correlated with adiposity and IR measures. In multivariate models, leptin represented a strong and independent determinant of HOMA-IR (R(2 0.378; p<0.01. Adjustment for age, BMI(z-score, lipids and inflammatory mediators abolished the association between leptin and HOMA-IR in boys, while in girls leptin remained still a significant predictor of IR (R(2 0.513; p<0.01. Finally, in both sexes, the joint effect of the L/HMW did not improve the prediction of basal IR as compared with leptin levels alone, which were

  1. Adiponectin promotes hyaluronan synthesis along with increases in hyaluronan synthase 2 transcripts through an AMP-activated protein kinase/peroxisome proliferator-activated receptor-{alpha}-dependent pathway in human dermal fibroblasts

    Yamane, Takumi; Kobayashi-Hattori, Kazuo [Department of Nutritional Sciences, Faculty of Applied Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502 (Japan); Oishi, Yuichi, E-mail: y3oishi@nodai.ac.jp [Department of Nutritional Sciences, Faculty of Applied Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502 (Japan)

    2011-11-18

    Highlights: Black-Right-Pointing-Pointer Adiponectin promotes hyaluronan synthesis along with an increase in HAS2 transcripts. Black-Right-Pointing-Pointer Adiponectin also increases the phosphorylation of AMPK. Black-Right-Pointing-Pointer A pharmacological activator of AMPK increases mRNA levels of PPAR{alpha} and HAS2. Black-Right-Pointing-Pointer Adiponectin-induced HAS2 mRNA expression is blocked by a PPAR{alpha} antagonist. Black-Right-Pointing-Pointer Adiponectin promotes hyaluronan synthesis via an AMPK/PPAR{alpha}-dependent pathway. -- Abstract: Although adipocytokines affect the functions of skin, little information is available on the effect of adiponectin on the skin. In this study, we investigated the effect of adiponectin on hyaluronan synthesis and its regulatory mechanisms in human dermal fibroblasts. Adiponectin promoted hyaluronan synthesis along with an increase in the mRNA levels of hyaluronan synthase 2 (HAS2), which plays a primary role in hyaluronan synthesis. Adiponectin also increased the phosphorylation of AMP-activated protein kinase (AMPK). A pharmacological activator of AMPK, 5-aminoimidazole-4-carboxamide-1{beta}-ribofuranoside (AICAR), increased mRNA levels of peroxisome proliferator-activated receptor-{alpha} (PPAR{alpha}), which enhances the expression of HAS2 mRNA. In addition, AICAR increased the mRNA levels of HAS2. Adiponectin-induced HAS2 mRNA expression was blocked by GW6471, a PPAR{alpha} antagonist, in a concentration-dependent manner. These results show that adiponectin promotes hyaluronan synthesis along with increases in HAS2 transcripts through an AMPK/PPAR{alpha}-dependent pathway in human dermal fibroblasts. Thus, our study suggests that adiponectin may be beneficial for retaining moisture in the skin, anti-inflammatory activity, and the treatment of a variety of cutaneous diseases.

  2. Effect of the diet components on adiponectin levels Efecto de los componentes de la dieta sobre los niveles de adiponectina

    C. E. G. Reis

    2010-12-01

    Full Text Available The prevalence of obesity has reached epidemic proportions worldwide, which requires nutritional interventions for its effective control. Adiponectin has antiinflammatory capacity, improves glucose tolerance and presents decreased plasma expression and concentration in obese individuals. Studies with animals reveal improvement in insulin resistance after the infusion of adiponectin; in humans, caloric restriction increases its levels. The present study aimed to analyze the effects of dietary components on gene expression and plasma concentration of adiponectin. Sixteen articles were found following a literature review -seven with interventions in animal models and nine in human. The results in animal models demonstrate that the consumption of hyperlipidemic diets, rich in saturated fat, reduces the levels of adiponectin, while the diets rich in polyunsaturated fatty acids and supplementation with omega-3 and eicosapentaenoic acid increase its gene expression and plasma levels. In humans, the consumption of a healthy and Mediterranean diet are positively associated with adiponectin levels, although the mechanisms are not fully understood. Due to the importance of adiponectin in preventing metabolic diseases and reducing cardiovascular risk, more research are needed on food strategies to promote the increase of adiponectin levels. Therefore, studies must be carried out to evaluate the response to different sources and levels of various dietary components and the safety of the supplementation of specific nutrients.La adiponectina tiene capacidad anti-inflamatoria, mejora la tolerancia a la glucosa y presenta una menor expresión de plasma y la concentración en personas obesas. Estudios con animales revelan una mejora en la resistencia a la insulina después de la infusión de la adiponectina, en los seres humanos, el aumento de la restricción calórica ocasiona el aumento os niveles de la adiponectina. El presente estudio tuvo como objetivo

  3. The associations between serum adiponectin, leptin, C-reactive protein, insulin, and serum long-chain omega-3 fatty acids in Labrador Retrievers

    Streeter RM

    2015-04-01

    Full Text Available Renee M Streeter,1 Angela M Struble,1 Sabine Mann,2 Daryl V Nydam,2 John E Bauer,3 Marta G Castelhano,1 Rory J Todhunter,1 Bethany P Cummings,4 Joseph J Wakshlag11Department of Clinical Sciences, 2Department of Population Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA; 3Department of Clinical Sciences, Texas A&M University, College Station, TX, USA; 4Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USAAbstract: Obesity has been associated with an increased inflammatory response and insulin resistance due to adipose tissue–derived adipokines and increases in C-reactive protein (CRP. Dogs appear to be similar to other species with the exception of adiponectin, which might not be affected by obesity status. Serum long-chain polyunsaturated fatty acid concentrations have been positively and negatively associated with serum adipokines. The aim of the study was to examine the relationship between leptin, CRP, adiponectin, and insulin to body condition score (BCS and to the long-chain omega-3 fatty acids in serum lipoproteins, including alpha-linolenic acid, eicosapentaenoic acid (EPA, docosapentanenoic acid (DPA, and docosahexaenoic acid (DHA as a reflection of dietary omega-3 status in the Labrador Retriever. Seventy-seven Labrador Retrievers were evaluated for BCS, percent fasting serum lipoprotein fatty acid concentrations, as well as serum leptin, adiponectin, insulin, and CRP. A multivariable general linear regression model was constructed to examine the association between the dependent variables leptin, CRP, adiponectin, and insulin and the predictor variables of BCS, age, and sex, as well as concentrations of alpha-linolenic acid, EPA, DHA, and DPA. Adiponectin concentration was positively associated with age (P<0.0008, EPA (P=0.027 and negatively associated with DHA (P=0.008. Leptin concentration was positively associated with an increased DHA (P=0.009, BCS (P

  4. Effect of dexamethasone on peroxisome proliferator activated receptor-gamma mRNA expression in 3T3-L1 adipocytes with the human recombinant adiponectin

    SHE Qi-mei; ZHAO Jing; WANG Xia-lian; ZHOU Chang-man; SHI Xian-zhong

    2007-01-01

    Background The fat derived protein adiponectin plays an important role in the regulation of glucose metabolism. The aim of this study was to provide the experimental basis for further investigating on adiponectin (ADPN) function. Its eukaryotic recombinant was constructed and expressed in precursor cells of 3T3-L1 adipocytes. The effects of dexamethasone on peroxisome proliferator activated receptor-gamma (PPAR-γ) mRNA expression in 3T3-L1 cells with human recombinant adiponectin were assessed. Methods The recombinant plasmid pMD18-T-hADPN and eukaryotic expression vector pcDNA3.1 + were digested by two restrictive endonucleases and adiponectin and linear pcDNA3.1+ were obtained. Then, they were ligated and translated into JM109. The recombinant pcDNA3.1+-hADPN so obtained was identified by digestion by restrictive endonuclease and nucleotide sequencing. The 3T3-L1 precursor cells were transfected using SuperFect Transfection Reagent (Qiagen). Furthermore, 3T3-L1 cells with human recombinant adiponectin incubated with dexamethasone (0.5 mmol/L) for 24 hours, cells were collected and total RNA was extracted. The PPAR-γ mRNA expression was quantified by semiquantitative reverse transcription-polymerase chain reaction (RT-PCR). Results After eukaryotic recombinant was digested by Hind Ⅲ and EcoR Ⅰ, fragments of 800 bp and 5.4 kb were identified by nucleotide sequence scanning and consistent with theoretical values. Electrophoretogram of RT-PCR in 3T3-L1 precursors showed only one band in front of 250 bp, which was consistent with theoretical value 234 bp. In the 3T3-L1 cells, 3T3-L1 cells with plasmid and 3T3-L1 cells human recombinant adiponectin, treatment with dexamethasone (0.5 mmol/L) decreased PPAR-γ mRNA expression compared to untreated controls (P<0.01). Effect of dexamethasone on PPAR-γ mRNA expression in 3T3-L1 cells was reversed by stably transfected human recombinant adiponectin.Conclusion The 3T3-L1 cells stably transfected human recombinant

  5. Study on the relationship between changes of serum, adiponectin some inflammatory cytokines levels and insulin resistance in newly diagnosed type 2 diabetes mellitus patients

    Objective: To study the relationship between changes of serum adiponectin,interleukin-6 (IL-6)tumor necrosis factor-α (TNF-α) levels and insulin resistance (IR), obesity parameters in newly diagnosed type 2 diabetes mellitus (DM2) patients. Methods: Serum adiponectin (with RIA), IL-6, TNF-α (with ELISA) levels as well as fBG, 2hPG, fasting insulin, 2h insulin, lipid profile were measured in 42 obese newly diagnosed DM2 patients (BMI>25), 50 non-obese DM2 patients (BMI<25) and 40 controls. Results: The levels of adiponectin obese group were significantly those in the other groups (P<0.05 and P<0.01), while levels in non-obese group were significantly lower than those in controls (P<0.01). The levels of IL-6 and TNF-α in obese group were significantly higher than those in the other groups (P<0.05 and P<0.01), while the levels in non-obese group were significantly higher than the levels in controls (P<0.01). The adiponectin levels were negatively correlated with insulin resistance(HOMA-IR) and BMI, while the cytokines levels were posisitively correlated with HOMA-IR and BMI. Conclusion: Adiponectin, IL-6 and TNF-α are closely related with insulin resistance, and take parts in development of the abnormal glucose metabolism. (authors)

  6. Screening of dried plant seed extracts for adiponectin production activity and tumor necrosis factor-alpha inhibitory activity on 3T3-L1 adipocytes.

    Okada, Yoshinori; Okada, Mizue; Sagesaka, Yumi

    2010-09-01

    To search for dried plant seeds with potent anti-diabetes activity, we conducted a large scale screening for inhibitory activity on tumor necrosis factor-alpha and facilitating activity on adiponectin production in vitro. These activities in 3T3-L1 adipocytes were screened from ethanol extracts of 20 kinds of dried plant seed marketed in Japan. komatsuna (Brassica rapa var. perviridis), common bean (Phaseolus vulgaris L.), qing geng cai (Brassica rapa var. chinensis), green soybean (Glycine max), spinach (Spinacia oleracea L.) and sugar snap pea (Pisum sativum L.) markedly enhanced adiponectin production (11.3 ~ 12.7 ng/ml) but Japanese radish (Raphanus sativus), edible burdock (Arctium lappa L.), bitter melon (Momordica charantia) and broccoli (Brassica oleracea var. italica) did not (0.9 ~ 2.7 ng/ml). All adiponectin-production-enhancing seeds except spinach (2.7 pg/ml) and okra (Abelmoschus esculentus) (6.6 pg/ml) effectively decreased tumor necrosis factor-alpha levels (0.0 pg/ml). We further examined the effects on free radical scavenging activities in the dried seed extracts. Although scavenging activity correlated well with total phenolic content of samples, no correlation was observed with adiponectin production. These results point to the potential of dried seed extracts as a means to modify the activity of tumor necrosis factor-alpha for the adiponectin production. PMID:20717728

  7. Acute knockdown of the insulin receptor or its substrates Irs1 and 2 in 3T3-L1 adipocytes suppresses adiponectin production

    Groeneveld, Matthijs P.; Brierley, Gemma V.; Rocha, Nuno M.; Siddle, Kenneth; Semple, Robert K.

    2016-01-01

    Loss of function of the insulin receptor (INSR) in humans produces severe insulin resistance. Unlike “common” insulin resistance, this is associated with elevated plasma levels of the insulin-sensitising, adipose-derived protein adiponectin. The underlying mechanism for this paradox is unclear, and it is at odds with the acute stimulation of adiponectin secretion reported on insulin treatment of cultured adipocytes. Given recent evidence for ligand-independent actions of the INSR, we used a lentiviral system to knock down Insr or its substrates Irs1 and Irs2 conditionally in 3T3-L1 murine preadipocytes/adipocytes to assess whether acute loss of their expression has different consequences to withdrawal of insulin. Efficient knockdown of either Insr or Irs1/2 was achieved by conditional shRNA expression, severely attenuating insulin-stimulated AKT phosphorylation and glucose uptake. Dual knockdown of Irs1 and Irs2 but not Insr in preadipocytes impaired differentiation to adipocytes. Acute knockdown of Insr or both Irs1 and Irs2 in adipocytes increased Adipoq mRNA expression but reduced adiponectin secretion, assessed by immunoassay. Knockdown sustained for 14 days also reduced immunoassay-detected adiponectin secretion, and moreover induced delipidation of the cells. These findings argue against a distinct effect of Insr deficiency to promote adiponectin secretion as the explanation for paradoxical insulin receptoropathy-related hyperadiponectinaemia. PMID:26888756

  8. Effect of Exercise on the Expression of Adiponectin mRNA and GLUT4 mRNA in Type 2 Diabetic Rats

    2005-01-01

    To investigate the impact of exercise on the expression of adiponectin and GLUT4 mR NA in type 2 diabetic rats, type 2 diabetic rat model was made. The diabetic rats were treated with swimming training for 8 weeks. The expression of adiponectin mRNA in perirenal fat and GLUT4mRNA in skeletal muscles were assessed by reverse transcription polymerase chain reaction (RT PCR) and the levels of blood glucose, serum insulin, and blood lipid were measured. Our results showed that the expression of adiponectin mRNA and GLUT4 mRNA in diabetic model group was decreased by 45 % (P<0.01), 43 % (P<0.01) respectively. The gene expression of adiponectin and GLUT4 was increased significantly in swimming group (P<0.05 and P<0.01, respectively).Compared with the model group, fasting insulin, TG, TC and FFA were decreased significantly in the training group (P<0.05 or P<0.01) as compared with model group. It is concluded that exercise can promote the expression of adiponectin mRNA and GLUT4 mRNA in type 2 diabetic rats,which may be one of the mechanisms responsible for the amelioration of insulin resistance in the rats.

  9. Circulating S100B and Adiponectin in Children Who Underwent Open Heart Surgery and Cardiopulmonary Bypass

    Alessandro Varrica

    2015-01-01

    Full Text Available Background. S100B protein, previously proposed as a consolidated marker of brain damage in congenital heart disease (CHD newborns who underwent cardiac surgery and cardiopulmonary bypass (CPB, has been progressively abandoned due to S100B CNS extra-source such as adipose tissue. The present study investigated CHD newborns, if adipose tissue contributes significantly to S100B serum levels. Methods. We conducted a prospective study in 26 CHD infants, without preexisting neurological disorders, who underwent cardiac surgery and CPB in whom blood samples for S100B and adiponectin (ADN measurement were drawn at five perioperative time-points. Results. S100B showed a significant increase from hospital admission up to 24 h after procedure reaching its maximum peak (P0.05 have been found all along perioperative monitoring. ADN/S100B ratio pattern was identical to S100B alone with the higher peak at the end of CPB and remained higher up to 24 h from surgery. Conclusions. The present study provides evidence that, in CHD infants, S100B protein is not affected by an extra-source adipose tissue release as suggested by no changes in circulating ADN concentrations.

  10. Repeated electroacupuncture in obese Zucker diabetic fatty rats: adiponectin and leptin in serum and adipose tissue.

    Peplow, Philip V

    2015-04-01

    Fasted, male, obese, Zucker, diabetic fatty rats aged 10-16 weeks were anesthetized with 1% halothane in nitrous oxide-oxygen (3:1) on alternate weekdays over 2 weeks. Group 1 (n = 4) did not receive electroacupuncture (controls); Group 2 (n = 4) received electroacupuncture using the Zhongwan and the Guanyuan acupoints; Group 3 (n = 4) received electroacupuncture using the bilateral Zusanli acupoints; Group 4 (n = 6) received neither halothane in nitrous oxide:oxygen nor electroacupuncture. At the end of study, animals were injected with sodium pentobarbitone (60 mg/mL, i.p.), and blood and white adipose tissue were collected. Analysis of variance and Duncan's tests showed that the mean leptin in serum was significantly lower and the adiponectin:leptin ratio was significantly higher in Group 2 than in Group 1 (p insulin: glucose ratio was significantly higher than it was for Group 1 (p insulin and insulin: glucose ratio were significantly higher than they were for Groups 1 and 3 (p  0.05). No significant differences in the serum or the adipose-tissue measurements between Groups 1 and 3 were observed (p > 0.05). PMID:25952122

  11. Adiponectin corrects premature cellular senescence and normalizes antimicrobial peptide levels in senescent keratinocytes.

    Jin, Taewon; Kim, Min Jeong; Heo, Won Il; Park, Kui Young; Choi, Sun Young; Lee, Mi-Kyung; Hong, Seung-Phil; Kim, Seong-Jin; Im, Myung; Moon, Nam Ju; Seo, Seong Jun

    2016-09-01

    Stress-induced premature senescence or aging causes dysfunction in the human somatic system. Adiponectin (Acrp30) plays a role in functional recovery, especially with adenosine 3',5'-monophosphate (AMP)-activated protein kinase (AMPK) and silent mating type information regulation 2 homolog 1 (SIRT1). Acrp30 stimulation reduced the premature senescence positive ratio induced by hydrogen peroxide (H2O2) and restituted human β-defensin 2 (hBD-2) levels in senescent keratinocytes. Acrp30 recovered AMPK activity in senescent keratinocytes and increased SIRT1 deacetylation activity. As a result, FoxO1 and FoxO3 transcription activity was recovered. Additionally, Acrp30 stimulation suppresses NFκB p65, which induces abnormal expression of hBD-2 induced by H2O2. In the present study, we have shown that Acrp30 reduces premature senescence and recovers cellular function in keratinocytes. These results suggest a role for Acrp30 as an anti-aging agent to improve impaired skin immune barriers. PMID:27349869

  12. Progesterone and adiponectin receptor family member 3 expression and clinical significance in breast cancer tissues

    Xiao-Qiang Dai; Hai-Liang Zhang; Hong-Mei Li

    2016-01-01

    Objective:To discuss progesterone and adiponectin receptor family member 3 expression and clinical significance in breast cancer tissues. Method:A total of 90 cases with breast cancer who were admitted in our hospital from Jan 2000 to Jan 2010 were selected. Meanwhile, normal tumor-adjacent breast tissues were selected as comparison. Diagnosis of all patients was confirmed by postoperative pathological examinations. Immunohistochemistry method was adopted to detect PAQR3 protein expression in breast cancer tissues and normal tumor-adjacent breast tissues and its clinical significance was discussed. Results:PAQR3 protein positive expression rate in breast cancer tissues was 25.6%, which was significantly lower than that (78.9%) in normal tumor-adjacent breast tissues;PAQR3 protein positive expression rate had nothing to do with age, tumor size, pathological types and differentiated degree of patients, but had significant correlation with TNM staging and lymphatic metastasis existence of patients. Kaplan–Meier survival analysis results showed that five years survival rate of patients with PAQR3 protein positive expression was significantly higher than whom with negative expression. Conclusion:PAQR3 protein expression in breast cancer tissues was significantly reduced, which indicated that PAQR3 protein possibly played an important role in pathogenesis of breast cancer.

  13. Relationship between Adiponectin Gene Polymorphisms and Late-Onset Alzheimer's Disease.

    Wei Li

    Full Text Available In recent years, researchers have found that adiponectin (ANP plays an important role in the pathogenesis of Alzheimer's disease (AD, and low serum concentrations of ANP are associated with AD. Higher plasma ANP level have a protective effect against the development of cognitive decline, suggesting that ANP may affect AD onset. Meanwhile, accumulating evidence supports the crucial role of ANP in the pathogenesis of AD. To study the relationship between ANP gene polymorphisms (rs266729, -11377C>G and rs1501299, G276T and late-onset AD (LOAD, we carried out a case-control study that included 201 LOAD patients and 257 healthy control subjects. Statistically significant differences were detected in the genotype and allelotype frequency distributions of rs266729 and rs1501299 between the LOAD group and the control group, with a noticeable increase in the G and T allelotype frequency distributions in the LOAD group (P 0.05 between the LOAD group and control group, whereas the CG and GT haplotypes were significantly different (P < 0.05, suggesting a negative correlation between the CG haplotype and LOAD onset (OR = 0.74, 95% CI = 0.57-0.96, P = 0.022, and a positive correlation between the GT haplotype and LOAD onset (OR = 2.29, 95% CI = 1.42-3.68, P = 0.005. Therefore, we speculated that the rs266729 and rs1501299 of ANP gene polymorphisms and the GT and CG haplotypes were associated with LOAD.

  14. Association of decrease in liver triglyceride content with increase in plasma adiponectin levels after pioglitazone treatment in Japanese patients with type 2 diabetes

    Pioglitazone, an insulin-sensitizing thiazolidinedione, has multiple clinical effects including improvement of insulin sensitivity, blood glucose levels and serum lipid profiles, decrease in liver triglyceride (TG) content, and increase in serum adiponectin. However, the correlation and causal relationship between these effects are not fully understood clinically. Therefore, we analyzed these relationships in patients with type 2 diabetes treated with pioglitazone, focusing on changes in liver TG content and serum adiponectin. Thirteen Japanese patients with type 2 diabetes were treated with pioglitazone (15 mg/day) for more than 3 months. Before and after the pioglitazone treatment, liver TG content was measured by magnetic resonance spectroscopy and various clinical variables were also measured. The pioglitazone treatment significantly decreased the liver TG content (-12.9±8.1%, p2=0.53, p=0.017), implying increased serum adiponectin may have decreased liver fat content. (author)

  15. Effect of Simavastatin on IL-6 and Adiponectin Secretion and mRNA Expression in 3T3-L1 Adipocytes

    YIN Xiaoming; TU Ling; YANG Huiqing

    2007-01-01

    In order to investigate the effects of simvastatin on secretion and mRNA expression of interleukin-6 (IL-6) and adiponectin in 3T3-L1 adipocytes, mouse 3T3-L1 adipocytes were stimulated with lipopolysaccharide (LPS). Production and mRNA expression of IL-6 and adiponectin in 3T3-L1 adipocytes were measured using enzyme-linked immunosorbent assay (ELISA) and reverse transcriptase polymerase chain reaction (RT-PCR), respectively. The results showed that simvastatin could significantly suppress LPS-induced IL-6 production and mRNA expression in adipocytes (P<0.05), but increase the LPS-induced adiponectin secretion and mRNA expression in a dose-dependent manner (P<0.05). It was suggested that simvastatin could exert beneficial effects on prevention of obesity-induced metabolic changes in adipocytes.

  16. C-reactive protein, high-molecular-weight adiponectin and development of metabolic syndrome in the Japanese general population: a longitudinal cohort study.

    Yoshifumi Saisho

    Full Text Available AIMS: To clarify predictive values of C-reactive protein (CRP and high-molecular-weight (HMW adiponectin for development of metabolic syndrome. RESEARCH DESIGN AND METHODS: We conducted a prospective cohort study of Japanese workers who had participated in an annual health checkup in 2007 and 2011. A total of 750 subjects (558 men and 192 women, age 46±8 years who had not met the criteria of metabolic syndrome and whose CRP and HMW-adiponectin levels had been measured in 2007 were enrolled in this study. Associations between CRP, HMW-adiponectin and development of metabolic syndrome after 4 years were assessed by logistic regression analysis and their predictive values were compared by receiver operating characteristic analysis. RESULTS: Among 750 subjects, 61 (8.1% developed metabolic syndrome defined by modified National Cholesterol Education Program Adult Treatment Panel III (NCEP-ATP III criteria and 53 (7.1% developed metabolic syndrome defined by Japan Society for the Study of Obesity (JASSO in 2011. Although CRP and HMW-adiponectin were both significantly correlated with development of metabolic syndrome, multivariate logistic regression analysis revealed that HMW-adiponectin but not CRP was associated with metabolic syndrome independently of BMI or waist circumference. Adding these biomarkers to BMI or waist circumference did not improve the predictive value for metabolic syndrome. CONCLUSION: Our findings indicate that the traditional markers of adiposity such as BMI or waist circumference remain superior markers for predicting metabolic syndrome compared to CRP, HMW-adiponectin, or the combination of both among the Japanese population.

  17. The relationships of leptin, adiponectin levels and paraoxonase activity with metabolic and cardiovascular risk factors in females treated with psychiatric drugs

    Aliye Ozenoglu

    2008-01-01

    Full Text Available OBJECTIVES: The aim of this study was to investigate serum leptin, adiponectin and paraoxonase1 levels in adult females receiving pharmacotherapy for various psychiatric disorders. METHODS: The study group consisted of 32 obese females (mean age 40.53 ± 11.00 years, mean body mass index 35.44 ± 5.33 kg/m² who were receiving treatment for psychiatric disorders, and the control group included 22 obese females (mean age 35.95 ± 9.16 years, mean body mass index 30.78 ± 3.33 kg/m² who were free of psychiatric disorders. Analyses were performed using a bioelectrical impedance device. Fasting blood samples were obtained for complete blood count and various biochemical tests, including determination of leptin, adiponectin and paraoxonase1 activity. RESULTS: Body mass index, waist and hip circumference, body fat percentage, fasting blood glucose, insulin, glycosylated hemoglobin, homeostasis model assesment of insulin resistance, alanine transaminase, aspartate tarnsaminase, and leptin levels were significantly higher in the study group than in controls. Although body weight was positively correlated with leptin levels in both groups, body weight was negatively correlated with adiponectin levels in the control group and positively correlated with adiponectin levels in the study group. In the study group, body mass index and hip circumference correlated positively with leptin levels, hip circumference correlated positively with adiponectin levels, and waist to hip ratio correlated positively with paraoxonase levels. In the control group, body mass index as well as waist and hip circumferences were positively correlated with leptin levels. Weight, body mass index, and hip circumference were also negatively correlated with the adiponectin/leptin ratio in the control group. CONCLUSION: This study indicates a higher risk for obesity-related disorders, particularly metabolic syndrome, diabetes and cardiovascular disease, in patients treated with

  18. The Liposuction-Induced Effects on Adiponectin and Selected Cytokines Are Not Affected by Exercise Training in Women

    Marina Yazigi Solis

    2014-01-01

    Full Text Available It has been suggested that the abrupt liposuction-induced decrease in adipose tissue could affect adipokine secretion pattern. We hypothesized that exercise training could positively impact adipokine metabolism following liposuction. The aim of this study was to investigate the effects of liposuction on inflammation-related adipokines in women who were either exercise-trained or remained sedentary after surgery. Thirty-six healthy normal-weight women underwent an abdominal liposuction and two months after surgery were randomly allocated into two groups: trained (TR, n=18, four-month exercise program and nontrained (NT, n=18. Inflammation-related adipokine serum levels (TNF-α, IL-6, IL-10, and adiponectin and abdominal and thigh subcutaneous adipose tissue (scAT mRNA levels were assessed before (PRE and six months after surgery (POST6. TNF-α, IL-6, and IL-10 serum levels were unchanged in both groups. In contrast, TNF-α, IL-6, and IL-10 mRNA levels in scAT were increased, whereas adiponectin scAT mRNA and serum levels were decreased at POST6 (P<0.05, main effect for time. No changes were observed in mRNA levels of MCP-1, CD14, and CD68 in any of the groups. In conclusion, liposuction downregulates adiponectin scAT gene expression and serum levels and upregulates scAT gene expression of inflammation-related genes six months after surgery in normal-weight women, irrespective of exercise training.

  19. Relation of Absolute or Relative Adiposity to Insulin Resistance, Retinol Binding Protein-4, Leptin, and Adiponectin in Type 2 Diabetes

    You Lim Kim

    2012-12-01

    Full Text Available BackgroundCentral fat mass (CFM correlates with insulin resistance and increases the risk of type 2 diabetes and cardiovascular complications; however, peripheral fat mass (PFM is associated with insulin sensitivity. The aim of this study was to investigate the relation of absolute and relative regional adiposity to insulin resistance index and adipokines in type 2 diabetes.MethodsTotal of 83 overweighted-Korean women with type 2 diabetes were enrolled, and rate constants for plasma glucose disappearance (KITT and serum adipokines, such as retinol binding protein-4 (RBP4, leptin, and adiponectin, were measured. Using dual X-ray absorptiometry, trunk fat mass (in kilograms was defined as CFM, sum of fat mass on the lower extremities (in kilograms as PFM, and sum of CFM and PFM as total fat mass (TFM. PFM/TFM ratio, CFM/TFM ratio, and PFM/CFM ratio were defined as relative adiposity.ResultsMedian age was 55.9 years, mean body mass index 27.2 kg/m2, and mean HbA1c level 7.12±0.84%. KITT was positively associated with PMF/TFM ratio, PMF/CFM ratio, and negatively with CFM/TFM ratio, but was not associated with TFM, PFM, or CFM. RBP4 levels also had a significant relationship with PMF/TFM ratio and PMF/CFM ratio. Adiponectin, leptin, and apolipoprotein A levels were related to absolute adiposity, while only adiponectin to relative adiposity. In correlation analysis, KITT in type 2 diabetes was positively related with HbA1c, fasting glucose, RBP4, and free fatty acid.ConclusionThese results suggest that increased relative amount of peripheral fat mass may aggravate insulin resistance in type 2 diabetes.

  20. Body fat mass and macronutrient intake in relation to circulating soluble leptin receptor, free leptin index, adiponectin, and resistin concentrations in healthy humans.

    Yannakoulia, Mary; Yiannakouris, Nikos; Blüher, Susann; Matalas, Antonia-Leda; Klimis-Zacas, Dorothy; Mantzoros, Christos S

    2003-04-01

    The adipocyte-derived hormones leptin [which circulates in a free form and bound to a soluble leptin receptor (sOB-R)], adiponectin, and resistin play a key role in regulating energy homeostasis and metabolism. We assessed the association between body composition, total energy, and macronutrient intake and serum leptin, sOB-R, free leptin index, adiponectin, and resistin concentrations in 61 female and 53 male consecutively enrolled healthy Greek students. In this cross-sectional study, total energy and macronutrient intake were determined using 3-d food records. Body composition was assessed by bioelectrical impedance analysis; fasting blood samples were taken for the measurement of total leptin, sOB-R, adiponectin, and resistin; and the ratio leptin/sOB-R was used as an index of free leptin. Serum sOB-R concentrations were lower in the female subjects compared with the males (27.24 +/- 29.06 vs. 50.14 +/- 39.74 ng/ml, P < 0.001), whereas leptin, adiponectin, and resistin concentrations were significantly higher in females (leptin: 9.93 +/- 6.01 vs. 3.27 +/- 2.54 ng/ml, P < 0.001; adiponectin: 11.40 +/- 6.73 micro g/ml vs. 4.90 +/- 2.79 micro g/ml; P < 0.001; resistin: 16.86 +/- 5.39 ng/ml in females vs. 14.00 +/- 7.16 ng/ml in males, P < 0.02). Simple regression analysis showed that, in both genders, leptin, free leptin index, adiponectin, and resistin correlated positively with body fat mass and negatively with waist to hip ratio. sOB-R correlated negatively with body fat mass and positively with waist to hip ratio. Multiple regression analysis models controlling for gender, body fat, and total energy intake demonstrated that sOB-R is positively associated with energy intake from carbohydrates and negatively with energy intake from dietary fat, whereas free leptin index is negatively associated with energy intake from carbohydrates and positively with energy intake from dietary fat. No statistically significant correlations were observed between serum