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Ann-Kristin Picke Institute of Comparative Molecular Endocrinology, Ulm University, Ulm, Germany

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Graeme Campbell Institute of Biomechanics, TUHH Hamburg University of Technology, Hamburg, Germany

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Nicola Napoli Diabetes and Bone Network, Department Endocrinology and Diabetes, University Campus Bio-Medico of Rome, Rome, Italy
Division of Bone and Mineral Diseases, Washington University in St Louis, St Louis, Missouri, USA

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Lorenz C Hofbauer Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany

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Martina Rauner Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany

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) The number and function of bone-forming osteoblast is reduced. In addition, vitamin D serum levels are decreased, which alters calcium and phosphate homeostasis. (2) Osteoblasts derive from MSC that favor differentiating into fat-storing adipocytes in

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Liangming Li Center for Scientific Research and Institute of Exercise and Health, Guangzhou Sport University, Guangzhou, China
Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Yuan Wei Center for Scientific Research and Institute of Exercise and Health, Guangzhou Sport University, Guangzhou, China
Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Chunlu Fang Center for Scientific Research and Institute of Exercise and Health, Guangzhou Sport University, Guangzhou, China
Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Shujing Liu Center for Scientific Research and Institute of Exercise and Health, Guangzhou Sport University, Guangzhou, China
Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Fu Zhou Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Ge Zhao Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Yaping Li Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Yuan Luo Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Ziyi Guo Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Weiqun Lin Department of Clinical Nutrition, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, China

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Wenqi Yang Center for Scientific Research and Institute of Exercise and Health, Guangzhou Sport University, Guangzhou, China
Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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tissue fibrosis ( 7 , 8 ). Adipocytes are surrounded by a network of extracellular matrix (ECM) mainly composed of collagens and fibronectin. Adipose fibrosis is defined as an excessive accumulation of ECM components ( 9 ). It has been demonstrated

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Shane M Regnier Committee on Molecular Metabolism and Nutrition, Chicago, Illinois, USA
Pritzker School of Medicine, Chicago, Illinois, USA
University of Chicago, Chicago, Illinois, USA

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Andrew G Kirkley University of Chicago, Chicago, Illinois, USA
Committee on Molecular Pathogenesis and Molecular Medicine, Chicago, Illinois, USA

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Daniel Ruiz Committee on Molecular Metabolism and Nutrition, Chicago, Illinois, USA
University of Chicago, Chicago, Illinois, USA

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Wakanene Kamau University of Chicago, Chicago, Illinois, USA

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Qian Wu Wadsworth Center, New York Department of Health, Albany, New York, USA

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Kurunthachalam Kannan Wadsworth Center, New York Department of Health, Albany, New York, USA

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Robert M Sargis Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA

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adiposity relative to the HFHSD controls ( Fig. 2C ). Histologic analysis of perigonadal/epididymal adipose tissue identified a significant increase in the number of adipocytes per high-power field (hpf) in the TF-treated group ( Fig. 2D ). Despite this

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E M Winter Leiden University Medical Center, Department of Internal Medicine, Division of Endocrinology, Center for Bone Quality, Leiden, the Netherlands

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A Ireland Musculoskeletal Science and Sports Medicine Research Centre, Department of Life Sciences, Manchester Metropolitan University, Manchester, United Kingdom

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N C Butterfield Molecular Endocrinology Laboratory, Department of Metabolism, Digestion and Reproduction, Imperial College London, Commonwealth Building, DuCane Road, London, United Kingdom

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M Haffner-Luntzer Institute of Orthopaedic Research and Biomechanics, University Medical Center Ulm, Ulm, Germany

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M-N Horcajada Nestlé Research, Department of Musculoskeletal Health, Innovation EPFL Park, Lausanne, Switzerland.

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A G Veldhuis-Vlug Leiden University Medical Center, Department of Internal Medicine, Division of Endocrinology, Center for Bone Quality, Leiden, the Netherlands
Jan van Goyen Medical Center, Department of Internal Medicine, Amsterdam, the Netherlands

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L Oei Department of Internal Medicine, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
Department of Epidemiology, Erasmus MC, University Medical Center, Rotterdam, The Netherlands

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G Colaianni Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy

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N Bonnet Nestlé Research, Department of Musculoskeletal Health, Innovation EPFL Park, Lausanne, Switzerland.

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nervous system (SNS), which increases release of neurotransmitters such as norepinephrine, stimulates bone resorption through an enhanced RANKL secretion by osteoblasts (OBs). In the bone marrow adipose tissue (BMAT), adipocytes undergo lipolysis to

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Anouar Aznou Department of Internal Medicine, Amsterdam University Medical Centers, MB Amsterdam, the Netherlands

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Rick Meijer Department of Internal Medicine, Amsterdam University Medical Centers, MB Amsterdam, the Netherlands

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Daniel van Raalte Department of Internal Medicine, Amsterdam University Medical Centers, MB Amsterdam, the Netherlands

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Martin den Heijer Department of Internal Medicine, Amsterdam University Medical Centers, MB Amsterdam, the Netherlands

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Annemieke Heijboer Endocrine Laboratory, Department of Clinical Chemistry, Amsterdam University Medical Centers, MB Amsterdam, the Netherlands

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Renate de Jongh Department of Internal Medicine, Amsterdam University Medical Centers, MB Amsterdam, the Netherlands

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sensitivity, but also hypertrophy of adipocytes and an overall increase in body fat mass ( 15 ). In south Asian men, both increased serum sclerostin levels and decreased expression of insulin signalling genes in white adipose tissue were found ( 28 ). Also

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Wenqi Yang Center for Scientific Research and Institute of Exercise and Health, Guangzhou Sports University, Guangzhou, China
Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Ling Liu Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Yuan Wei Center for Scientific Research and Institute of Exercise and Health, Guangzhou Sports University, Guangzhou, China
Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Chunlu Fang Center for Scientific Research and Institute of Exercise and Health, Guangzhou Sports University, Guangzhou, China
Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Fu Zhou Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Jinbao Chen Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Qinghua Han Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Meifang Huang Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Xuan Tan Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Qiuyue Liu Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Qiang Pan Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Lu Zhang Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Xiaojuan Lei Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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Liangming Li Center for Scientific Research and Institute of Exercise and Health, Guangzhou Sports University, Guangzhou, China
Key Laboratory of Sports Technique, Tactics and Physical Function of General Administration of Sport of China, Scientific Research Center, Guangzhou Sport University, Guangzhou, China

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adipocyte ( 23 )) and a significant reduction in F4/80 mRNA levels ( Fig. 5A and B ). HFD feeding increased the expression of proinflammatory cytokines TNFα, IL-1β, IL-6 and MCP-1, which was largely prevented by exercise training ( Fig. 5B ). Figure 5

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Estíbaliz Castillero
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Ana Isabel Martín
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Maria Paz Nieto-Bona Department of Physiology, Department of Histology, Faculty of Medicine, Complutense University of Madrid, 28040 Madrid, Spain

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Carmen Fernández-Galaz
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María López-Menduiña
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María Ángeles Villanúa
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Asunción López-Calderón
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glucose metabolism by inhibiting gluconeogenesis in the liver and maintaining systemic lipid and insulin-dependent muscle glucose uptake. It has been reported that arthritic rats have reduced adipocyte size and downregulated membrane glucose transporter

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Emanuela Zaharieva Department of Internal Medicine, University Hospital Alexandrovska, Clinic of Endocrinology, Faculty of Medicine, Medical University-Sofia, Sofia, Bulgaria

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Zdravko Kamenov Department of Internal Medicine, University Hospital Alexandrovska, Clinic of Endocrinology, Faculty of Medicine, Medical University-Sofia, Sofia, Bulgaria

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Tsvetelina Velikova Department of Clinical Immunology, University Hospital St. Ivan Rilski, Laboratory of Clinical Immunology, Faculty of Medicine, Medical University-Sofia, Sofia, Bulgaria

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Adelina Tsakova Department of Clinical Laboratory, University Hospital Alexandrovska, Central Clinical Laboratory, Faculty of Medicine, Medical University-Sofia, Sofia, Bulgaria

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Yosif El-Darawish Laboratory of Tumor Immunology and Cell Therapy, Hyogo College of Medicine, Hyogo, Japan

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Haruki Okamura Laboratory of Tumor Immunology and Cell Therapy, Hyogo College of Medicine, Hyogo, Japan

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major contributor to inflammatory cytokine release in these states ( 23 ). As with other adipokines ( 24 , 25 ), adipocytes can produce IL-18 ( 26 , 27 ), but they do not seem to be the main source of the interleukin – rather it is being predominantly

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Eric M Ndombi Bomu Hospital, Department of Pathology, Department of Environment and Health Sciences, Department of Biomedical Sciences and Technology, Department of Medical Laboratory Sciences, Kapkatet Campus, Centre for Virus Research, Department of Medical Laboratory Sciences, Mombasa, Kenya

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Valentine Budambula Bomu Hospital, Department of Pathology, Department of Environment and Health Sciences, Department of Biomedical Sciences and Technology, Department of Medical Laboratory Sciences, Kapkatet Campus, Centre for Virus Research, Department of Medical Laboratory Sciences, Mombasa, Kenya

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Mark K Webale Bomu Hospital, Department of Pathology, Department of Environment and Health Sciences, Department of Biomedical Sciences and Technology, Department of Medical Laboratory Sciences, Kapkatet Campus, Centre for Virus Research, Department of Medical Laboratory Sciences, Mombasa, Kenya

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Francis O Musumba Bomu Hospital, Department of Pathology, Department of Environment and Health Sciences, Department of Biomedical Sciences and Technology, Department of Medical Laboratory Sciences, Kapkatet Campus, Centre for Virus Research, Department of Medical Laboratory Sciences, Mombasa, Kenya

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Jesca O Wesongah Bomu Hospital, Department of Pathology, Department of Environment and Health Sciences, Department of Biomedical Sciences and Technology, Department of Medical Laboratory Sciences, Kapkatet Campus, Centre for Virus Research, Department of Medical Laboratory Sciences, Mombasa, Kenya

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Erick Mibei Bomu Hospital, Department of Pathology, Department of Environment and Health Sciences, Department of Biomedical Sciences and Technology, Department of Medical Laboratory Sciences, Kapkatet Campus, Centre for Virus Research, Department of Medical Laboratory Sciences, Mombasa, Kenya

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Aabid A Ahmed
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Raphael Lihana Bomu Hospital, Department of Pathology, Department of Environment and Health Sciences, Department of Biomedical Sciences and Technology, Department of Medical Laboratory Sciences, Kapkatet Campus, Centre for Virus Research, Department of Medical Laboratory Sciences, Mombasa, Kenya

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Tom Were Bomu Hospital, Department of Pathology, Department of Environment and Health Sciences, Department of Biomedical Sciences and Technology, Department of Medical Laboratory Sciences, Kapkatet Campus, Centre for Virus Research, Department of Medical Laboratory Sciences, Mombasa, Kenya

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.5 kg/m 2 ), lower body weight and fat mass in HIV-infected and uninfected IDUs (13, 14) , indicate that anthropometric measures are valuable in estimating adiposity in IDUs. In addition, the link between lipodystrophy and adipocyte dysfunction (15

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Nannan Bian Department of Endocrinology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China

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Xiaomeng Sun Department of Endocrinology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China

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Biao Zhou Departments of General Surgery and Obesity and Metabolic Disease Center, China-Japan Friendship Hospital, Beijing, China

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Lin Zhang Department of Endocrinology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China

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Qiu Wang Department of Endocrinology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China

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Yu An Department of Endocrinology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China

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Xiaohui Li Department of Endocrinology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China

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Yinhui Li Department of Endocrinology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China

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Jia Liu Department of Endocrinology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China

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Hua Meng Departments of General Surgery and Obesity and Metabolic Disease Center, China-Japan Friendship Hospital, Beijing, China

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Guang Wang Department of Endocrinology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China

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-body metabolism. Adipocytes release multiple anti-inflammatory and pro-inflammatory cytokines. A low degree of inflammation is a link between IR and obesity. Studies showed that elevated proinflammatory cytokines TNF-α and IL-6 impaired insulin receptor substrate

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