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adipocytokine AND adipocyte

Arif Ul Hasan, Koji Ohmori, Takeshi Hashimoto, Kazuyo Kamitori, Fuminori Yamaguchi, Takahisa Noma, Junsuke Igarashi, Kazuhito Tsuboi, Masaaki Tokuda, Akira Nishiyama, Masakazu Kohno
How nutritional excess leads to inflammatory responses in metabolic syndrome is not well characterized. Here, we evaluated the effects of ω-3 polyunsaturated fatty acid specific G-protein coupled receptor 120 (GPR120) activation on inflammatory pathways in adipocytes, and the influence of this process on macrophage migration. Using 3T3-L1 adipocytes, we found that agonizing GPR120 using its synthetic ligand, GSK137647, attenuated both basal and lipopolysaccharide-induced production of interleukin-6 (IL-6) and C-C motif chemokine ligand 2 (CCL2)...
March 3, 2017: Biochemical and Biophysical Research Communications
Magdalena Stojek
Adipose tissue is not merely a storage depot of triacylglycerols but also a major endocrine organ. Its cells, including adipocytes, synthesize and secrete a range of biologically active molecules termed adipokines. Adipokines that display the properties of cytokines are often called adipocytokines. In recent years there has been increasing interest in a new adipokine called chemerin. Chemerin is a protein synthesized mostly by the adipose tissue and the liver as inactive pre‑pro‑chemerin. After the intracellular hydrolytic cutting off of the 20‑amino‑acid N‑terminal polypeptide, it is secreted into the bloodstream as inactive pro‑chemerin...
February 15, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
J T Schwartze, K Landgraf, U Spielau, D Rockstroh, D Löffler, J Kratzsch, W Kiess, A Körner
BACKGROUND/OBJECTIVES: The recently identified adipocytokine C1QTNF5 (encodes for CTRP5) has been demonstrated to inhibit pro-metabolic insulin signaling in adipocytes. We hypothesized that adipocyte C1QTNF5 expression in subcutaneous (sc) adipose tissue (AT) would correlate with the degree of obesity, systemic CTRP5 serum levels, and early AT and metabolic dysfunction in children. SUBJECTS/METHODS: Sc AT samples were obtained from 33 healthy Caucasian lean children aged 10...
February 27, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
J I Khudyakov, C D Champagne, L M Meneghetti, D E Crocker
Stress can compromise an animal's ability to conserve metabolic stores and participate in energy-demanding activities that are critical for fitness. Understanding how wild animals, especially those already experiencing physiological extremes (e.g. fasting), regulate stress responses is critical for evaluating the impacts of anthropogenic disturbance on physiology and fitness, key challenges for conservation. However, studies of stress in wildlife are often limited to baseline endocrine measurements and few have investigated stress effects in fasting-adapted species...
February 10, 2017: Scientific Reports
Anna Alisi, Guido Carpino, Felipe L Oliveira, Nadia Panera, Valerio Nobili, Eugenio Gaudio
The obese phenotype is characterized by a state of chronic low-grade systemic inflammation that contributes to the development of comorbidities, including nonalcoholic fatty liver disease (NAFLD). In fact, NAFLD is often associated with adipocyte enlargement and consequent macrophage recruitment and inflammation. Macrophage polarization is often associated with the proinflammatory state in adipose tissue. In particular, an increase of M1 macrophages number or of M1/M2 ratio triggers the production and secretion of various proinflammatory signals (i...
2017: Mediators of Inflammation
Terence M Myckatyn, I Janelle Wagner, Babak J Mehrara, Melissa A Crosby, Julie E Park, Bahjat F Qaqish, Dominic T Moore, Evan L Busch, Amanda K Silva, Surinder Kaur, David W Ollila, Clara N Lee
BACKGROUND: Fat transfer is an increasingly popular method for refining postmastectomy breast reconstructions. However, concern persists that fat transfer may promote disease recurrence. Adipocytes are derived from adipose-derived stem cells and express adipocytokines that can facilitate active breast cancer cells in laboratory models. The authors sought to evaluate the association between fat transfer to the reconstructed breast and cancer recurrence in patients diagnosed with local or regional invasive breast cancers...
January 2017: Plastic and Reconstructive Surgery
Koji Ishiguro, Rie Kurata, Yoshikazu Shimada, Yoto Sameshima, Takashi Kume
Sweetpotato peptide (SPP) was prepared by enzyme digestion of sweetpotato protein from starch wastewater. Animal experiments assessed the effect of SPP on body weight, abdominal adipose tissue mass, serum lipids and adipocytokines. Body and liver weight and epididymal and mesenteric fat of mice fed a high-fat diet containing 0.5% or 5% SPP for 28 days were significantly lower than control mice. Triglyceride and cholesterol in VLDL and LDL and leptin levels were significantly lower in the serum of SPP-administered mice compared to control mice...
December 2016: Heliyon
Zhenjiang Liu, Lu Gan, Tianjiao Wu, Fei Feng, Dan Luo, Huihui Gu, Shimin Liu, Chao Sun
Adiponectin is a cytokine produced predominantly by adipose tissue and correlates with glucose and lipid homeostasis. However, the effects of adiponectin on endoplasmic reticulum (ER) stress and apoptosis of adipose tissue remain elusive. In this study, we found that tunicamycin-induced ER stress increased serum free fatty acid (FFA) and impaired glucose tolerance, elevated the mRNA levels of GRP78, Chop, ATF2 and caspase 3, but reduced adiponectin mRNA level in white adipose tissue. Moreover, ER stress-triggered adipocyte apoptosis by increasing cellular FFA level and Ca(2+) level...
November 24, 2016: Cell Death & Disease
Cuizhe Wang, Xiaodan Ha, Wei Li, Peng Xu, Yajuan Gu, Tingting Wang, Yan Wang, Jianxin Xie, Jun Zhang
Objective Recent studies have revealed a link between toll-like receptors (TLRs), Kruppel-like factors (KLFs), and the adipose tissue inflammation associated with obesity. TLR4 is associated with chronic inflammation in obesity. KLF7 is known to play an important role in the differentiation of adipocytes, but its role in visceral adipose tissue inflammation has not yet been investigated. Thus, the objective of this study was to determine the correlation of TLR4 and KLF7 in inflammation induced by obesity. Methods A total of 32 Wistar male rat subjects were fed in the center for experimental animals of Shihezi University...
October 6, 2016: Inflammation
Liang Shi, Chaoming Mao, Xuefeng Wang, Rencong Liu, Lin Li, Xiao Mou, Ping Xu, Hongli Li, Chengcheng Xu, Guoyue Yuan, Bing Wan, Hao Zhang
Increasing evidence suggests the association between obesity and bone metabolism. However, whether excessive fat accumulation has a beneficial or adverse effect on bone health remains controversial. Chemerin is a novel adipocyte-derived hormone and a chemoattractant cytokine that regulates adipogenesis. This study was performed to investigate the associations of serum chemerin with bone mineral density (BMD) and serum pro-inflammatory cytokine levels in 543 Chinese obese postmenopausal women. BMD of the femoral neck and lumbar spine, lean mass, and fat mass were measured using dual energy X-ray absorptiometry...
August 2016: Medicine (Baltimore)
Jinn-Yang Chen, Deng-Yuan Jian, Chih-Chan Lien, Yu-Ting Lin, Ching-Heng Ting, Luen-Kui Chen, Ting-Chia Hsu, Hsuan-Min Huang, Yu-Ting Wu, Tse-Ting Kuan, Yu-Wen Chao, Liang-Yi Wu, Seng-Wong Huang, Chi-Chang Juan
Obesity is a risk factor that promotes progressive kidney disease. Studies have shown that an adipocytokine imbalance contributes to impaired renal function in humans and animals, but the underlying interplay between adipocytokines and renal injury remains to be elucidated. We aimed to investigate the mechanisms linking obesity to chronic kidney disease. We assessed renal function in high-fat (HF) diet-fed and normal diet-fed rats, and the effects of preadipocyte- and adipocyte-conditioned medium on cultured podocytes...
November 2016: Journal of Endocrinology
Daniel Eriksson Hogling, Paul Petrus, Hui Gao, Jesper Bäckdahl, Ingrid Dahlman, Jurga Laurencikiene, Juan Acosta, Anna Ehrlund, Erik Näslund, Agne Kulyte, Niklas Mejhert, Daniel P Andersson, Peter Arner, Mikael Rydén
CONTEXT: Cardiometabolic complications in obesity may be linked to white adipose tissue (WAT) dysfunction. Transcriptomic studies of subcutaneous WAT have reported that CCL18, encoding the chemokine CCL18, is increased in obesity/insulin resistance but its functional role is unknown. OBJECTIVE: Determine if CCL18 is secreted from subcutaneous WAT and if secreted and/or serum levels associate with metabolic phenotypes. Define the primary cellular source and if CCL18 exerts effects on adipocytes...
July 26, 2016: Journal of Clinical Endocrinology and Metabolism
Toshiaki Shimizu, Munekazu Yamakuchi, Kamal Krishna Biswas, Bibek Aryal, Shingo Yamada, Teruto Hashiguchi, Ikuro Maruyama
OBJECTIVE: Obesity is a chronic inflammatory disease, and adipocytes contribute to obesity-associated inflammation by releasing inflammatory mediators. High mobility group box 1 (HMGB1), a highly conserved DNA-binding protein, mainly localized to cell nuclei, has been recently recognized as an innate pro-inflammatory mediator when released extracellularly. It was hypothesized that HMGB1 is an adipocytokine that acts as an innate pro-inflammatory mediator in white adipose tissue (WAT) of patients with obesity and is associated with insulin resistance...
September 2016: Obesity
Yuntao Guo, Xiuxiu Zhang, Wanlong Huang, Xiangyang Miao
microRNAs (miRNAs), a class of endogenous non-coding RNA about 22 nucleotide long, regulate gene expression at the post-transcription level by inhibiting the translation or inducing the degradation of their target mRNAs in organisms. A lot of studies reveal that miRNAs in adipose tissues are involved in adipocyte differentiation and lipid metabolism and modulated by multiple transcription factors, adipocytokines and environmental factors, which form a complex regulatory network maintaining the homeostasis of adipose tissues...
February 2016: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
Di Wu, Qian-Yun Xi, Xiao Cheng, Tao Dong, Xiao-Tong Zhu, Gang Shu, Li-Na Wang, Qing-Yan Jiang, Yong-Liang Zhang
TNF-α is a multifunctional cytokine participating in immune disorders, inflammation, and tumor development with regulatory effects on energy metabolism. Our work focused on the function of TNF-α in adipogenesis of primary porcine adipocytes. TNF-α could suppress the insulin receptor (IR) at the mRNA and protein levels. Microarray analysis of TNF-α-treated porcine adipocytes was used to screen out 29 differentially expressed microRNAs (miRNAs), 13 of which were remarkably upregulated and 16 were intensely downregulated...
August 2016: Journal of Lipid Research
Cécile Martinerie, Marie Garcia, Thi Thu Huong Do, Bénédicte Antoine, Marthe Moldes, Guillaume Dorothee, Chantal Kazazian, Martine Auclair, Marion Buyse, Tatiana Ledent, Pierre-Olivier Marchal, Maria Fesatidou, Adrien Beisseiche, Haruhiko Koseki, Shuichi Hiraoka, Christos Evangelos Chadjichristos, Bertrand Blondeau, Raphael Georges Denis, Serge Luquet, Bruno Fève
Identification of new adipokines that potentially link obesity to insulin resistance represents a major challenge. We recently showed that NOV/CCN3, a multifunctional matricellular protein, is synthesized and secreted by adipose tissue, with plasma levels highly correlated with BMI. NOV involvement in tissue repair, fibrotic and inflammatory diseases, and cancer has been previously reported. However, its role in energy homeostasis remains unknown. We investigated the metabolic phenotype of NOV(-/-) mice fed a standard or high-fat diet (HFD)...
September 2016: Diabetes
Kristof Nagy, Shankar Prasad Nagaraju, Connie M Rhee, Zoltan Mathe, Miklos Z Molnar
In the last two decades, perceptions about the role of body fat have changed. Adipocytes modulate endocrine and immune homeostasis by synthesizing hundreds of hormones, known as adipocytokines. Many studies have been investigating the influences and effects of these adipocytokines and suggest that they are modulated by the nutritional and immunologic milieu. Kidney transplant recipients (KTRs) are a unique and relevant population in which the function of adipocytokines can be examined, given their altered nutritional and immune status and subsequent dysregulation of adipocytokine metabolism...
June 2016: Clinical Kidney Journal
Ying Zhang, Hao-Hang Zhang, Jia-Hui Lu, Si-Yuan Zheng, Tao Long, Ying-Tao Li, Wei-Zhen Wu, Fang Wang
AIMS/INTRODUCTION: To observe the longitudinal changes in serum adipocyte fatty acid-binding protein (AFABP), carbohydrate, and lipid metabolism parameters in women with and without gestational diabetes mellitus (GDM) during mid- and late pregnancy periods, as well as to identify whether there is any association between AFABP and development of GDM. MATERIALS AND METHODS: A total of 40 GDM and 240 normal glucose tolerance participants were enrolled at 24-28 weeks and completed the study...
September 2016: Journal of Diabetes Investigation
Keiko Nagahara, Kazushige Dobashi, Takuya Ishikawa, Yuya Nakano, Yoshifusa Abe, Daisuke Tanaka, Kazuo Itabashi
AIM: The increase in monocyte chemoattractant protein-1 (MCP-1) and the decrease in adiponectin production from hypertrophic adipocytes are associated with adipose tissue inflammation and its metabolic complications. The aim of this study was to determine whether 5-aminoimidazole-4-carboxamide 1-β-D-ribofuranoside (AICAR), an adenosine monophosphate-activated protein kinase (AMPK) activator, modulates these adipocytokine productions in tumor necrosis factor-α (TNFα)-treated adipocytes...
December 1, 2016: Journal of Atherosclerosis and Thrombosis
Satomi Kagota, Saki Iwata, Kana Maruyama, Hirokazu Wakuda, Kazumasa Shinozuka
Metabolic syndrome is a complex of disorders that includes visceral obesity, insulin resistance, hypertension, and dyslipidemia. It is characterized by an increased risk for serious cardiovascular events. Adipocytes are now recognized to contribute to the development of cardiovascular complications in metabolic syndrome via the release of several bioactive substances (adipocytokines). Obesity induces an increase in the volume of perivascular adipose tissue (PVAT), which is located outside the blood vessels...
2016: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
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