CXC ligand 5 is an adipose-tissue derived factor that links obesity to insulin resistance.
نویسندگان
چکیده
We show here high levels of expression and secretion of the chemokine CXC ligand 5 (CXCL5) in the macrophage fraction of white adipose tissue (WAT). Moreover, we find that CXCL5 is dramatically increased in serum of human obese compared to lean subjects. Conversely, CXCL5 concentration is decreased in obese subjects after a weight reduction program, or in obese non-insulin-resistant, compared to insulin-resistant, subjects. Most importantly we demonstrate that treatment with recombinant CXCL5 blocks insulin-stimulated glucose uptake in muscle in mice. CXCL5 blocks insulin signaling by activating the Jak2/STAT5/SOCS2 pathway. Finally, by treating obese, insulin-resistant mice with either anti-CXCL5 neutralizing antibodies or antagonists of CXCR2, which is the CXCL5 receptor, we demonstrate that CXCL5 mediates insulin resistance. Furthermore CXCR2-/- mice are protected against obesity-induced insulin resistance. Taken together, these results show that secretion of CXCL5 by WAT resident macrophages represents a link between obesity, inflammation, and insulin resistance.
منابع مشابه
Sulfonamides for the Prevention of Dabetes
Wasserfall et al., “Autoantibody markers for the diagnosis and prediction of type 1 diabetes.” Autoimmunity Reviews, 2006, 5(6):424-428. Aribi, "Candidate Genes Implicated in Type 1 Diabetes Suscepti bility,” Current Diabetes Reviews, 2008, 4:110-121. Bakshi et al., Novel Role of CXCR2 in Regulation of gamma Secretase Activity, ACS Chemical Biology, 3 (12):777-789, 2009. Chavey et al., CXC Liga...
متن کاملThe effect of aerobic exercise on epicardial adipose tissue, insulin resistance, and some liver enzymes in high-fat diet-induced obesity male wistar rat
Background and Aim: Due to the prevalence and socio-economic consequences of obesity in mortality, cardiovascular (CAD) and nonalcoholic fatty liver disease the effectiveness of aerobic exercise on epicardial adipose tissue (EAT), insulin resistance (IR) and some liver enzymes of high-fat diet-induced obesity male wistar rats was investigated. Methods: Thirty-two male Wistar rats with an averag...
متن کاملSimultaneous Effects of Metformin and Sitagliptin on the Contents of Insulin Resistance Proteins Glucose Transporter 4 and Protein Kinase B in Diabetic Patients\' Adipose Tissue
Objective: Obesity is a factor in the development of insulin resistance and type 2 diabetes. Obesity contributes a wide variety of metabolic changes such as insulin resistance. The insulin signal mechanism to intra-cells occurs in insulin resistance, primarily in adipose tissue cells, which can be appropriate targets for therapeutic approaches by recognizing the proteins in this pathway. The st...
متن کاملمعرفی هورمون ورزش (Irisin)
Introduction: Almost 15% of world populations suffer from obesity. Obesity and insulin resistance are the key pathogenesis risk factors of type 2 diabetes mellitus (T2DM) and cardiovascular disease. Exercise training can accelerate metabolism and help to prevent the obesity and diabetes through induction of Irisin and triggers conversion of white adipose tissue to brown adipose tissue. Metho...
متن کاملتاثیر 12 هفته تمرینات مقاومتی بر سطوح آپلین، امنتین-1 و مقاومت به انسولین در زنان مسن دارای اضافه وزن مبتلا به دیابت نوع 2
Background and Objective: Nowadays, it has been recognized that Apelin and Omentin as the hormones secreted by adipose tissue, can be effective in regulating metabolism. The purpose of the present study was to determine the impact of 12 weeks of resistance training exercises on the Apelin, Omentin-1 levels and insulin resistance in overweight elderly women suffering from type 2 diabetes. Materi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Cell metabolism
دوره 9 4 شماره
صفحات -
تاریخ انتشار 2009