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https://www.readbyqxmd.com/read/29775920/il-33-stimulates-expression-of-the-gpr84-ex33-fatty-acid-receptor-gene-and-of-cytokine-and-chemokine-genes-in-human-adipocytes
#1
Mohamed S Zaibi, Małgorzata A Kępczyńska, Parvathy Harikumar, Suliman Y Alomar, Paul Trayhurn
Expression of GPCR fatty acid sensor/receptor genes in adipocytes is modulated by inflammatory mediators, particularly IL-1β. In this study we examined whether the IL-1 gene superfamily member, IL-33, also regulates expression of the fatty acid receptor genes in adipocytes. Human fat cells, differentiated from preadipocytes, were incubated with IL-33 at three different dose levels for 3 or 24 h and mRNA measured by qPCR. Treatment with IL-33 induced a dose-dependent increase in GPR84 mRNA at 3 h, the level with the highest dose being 13...
May 15, 2018: Cytokine
https://www.readbyqxmd.com/read/29775748/microrna-204-5p-regulates-3t3-l1-preadipocyte-proliferation-apoptosis-and-differentiation
#2
Jingjing Du, Peiwen Zhang, Mailin Gan, Xue Zhao, Yan Xu, Qiang Li, Yanzhi Jiang, Guoqing Tang, Mingzhou Li, Jinyong Wang, Xuewei Li, Shunhua Zhang, Li Zhu
Obesity due to excessive lipid accumulation is closely associated with metabolic diseases such as type 2 diabetes, insulin resistance and inflammation. Therefore, a detailed understanding of the molecular mechanisms that underlie adipogenesis is crucial to develop treatments for diseases related to obesity. Here, we found that the microRNA-204-5p (miR-204-5p) was expressed at low levels in fat tissues from obese mice fed long-term with a high-fat diet (HFD). Overexpression or inhibition of miR-204-5p in vitro in 3T3-L1 preadipocytes significantly inhibited or promoted 3T3-L1 proliferation, respectively, an effect mediated by regulating cell proliferation factors...
May 15, 2018: Gene
https://www.readbyqxmd.com/read/29775644/redox-signal-mediated-trpm2-promotes-ang-ii-induced-adipocyte-insulin-resistance-via-ca-2-dependent-camkii-jnk-cascade
#3
Min Gao, Yu Du, Jing-Wen Xie, Jing Xue, Yi-Ting Wang, Li Qin, Ming-Ming Ma, Yong-Bo Tang, Xiao-Yan Li
BACKGROUND AND OBJECTIVE: Redox-sensitive transient receptor potential melastatin 2 (TRPM2) is a Ca2+ -permeable, nonselective cation channel which plays a crucial role in various physiological processes. However, little is known whether TRPM2 is involved in adipocyte dysfunction during hypertension. In the present study, we determined the role of TRPM2 in angiotensin II (Ang II)-induced insulin resistance in adipocytes and the underlying mechanisms. METHODS: Ang II-induced adipocyte insulin resistant model was conducted...
May 15, 2018: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29775611/reduced-adiposity-by-compensatory-wat-browning-upon-ibat-removal-in-mice
#4
Zhengyu Piao, Baiqiang Zhai, Xiaoxiao Jiang, Meng Dong, Changguo Yan, Jun Lin, Wanzhu Jin
The strong effects of classic brown adipose tissue (BAT) and recruited beige adipocytes in treatment of obesity and metabolic syndrome have been attracting increasing research interest. Cold treatment is an effective, convenient approach to stimulate BAT activity and induce white adipose tissue (WAT) browning. Here, we utilized prolonged cold exposure (from 2 h to 2 weeks in a 4° cold chamber) to elucidate dynamic changes in BAT and in WAT browning during acute and chronic cold exposure in mice. BAT mass decreased quickly, with reduced lipid droplet sizes within 8 h of cold exposure owing to the utilization of BAT pre-storage triglycerides, and subsequently increased during prolonged cold exposure...
May 15, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29775610/monocarboxylate-transporters-in-breast-cancer-and-adipose-tissue-are-novel-biomarkers-and-potential-therapeutic-targets
#5
Zhiyu Li, Qi Wu, Si Sun, Juan Wu, Juanjuan Li, Yimin Zhang, Changhua Wang, Jingping Yuan, Shengrong Sun
Monocarboxylate transporters (MCTs) are transmembrane proteins that control the lactate metabolism and associated with poor prognosis in solid tumors including breast cancer (BC). This study aimed to evaluate the clinical and prognostic value of MCTs used by immunohistochemistry and quantum dots-based fluorescent imaging technique in BC and surrounding stroma with emphasis on the interaction between tumour and stroma. Moreover, the data from The Cancer Genome Atlas (TCGA) was analyzed to evaluate the association between MCTs mRNA expression and prognosis of breast cancer patients...
May 15, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29775452/the-effects-of-a-pulsed-electromagnetic-field-on-the-proliferation-and-osteogenic-differentiation-of-human-adipose-derived-stem-cells
#6
Yukun Yin, Ping Chen, Qiang Yu, Yan Peng, ZeHao Zhu, Jing Tian
BACKGROUND A low frequency pulsed electromagnetic field (PEMF) has been confirmed to play an important role in promoting the osteogenic differentiation of human bone marrow stem cells (BMSCs). Adipose-derived stem cells (ASCs) possess some attractive characteristics for clinical application compared to BMSCs, such as abundant stem cells from lipoaspirates, faster growth, less discomfort and morbidity during surgery. ASCs can become adipocytes, osteoblasts, chondrocytes, myocytes, neurocytes, and other cell types...
May 18, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29773671/targeted-inhibition-of-cd74-attenuates-adipose-cox-2-mif-mediated-m1-macrophage-polarization-and-retards-obesity-related-adipose-tissue-inflammation-and-insulin-resistance
#7
Pei-Chi Chan, Ting-Ni Wu, Ying-Chuan Chen, Chieh-Hua Lu, Martin Wabitsch, Yu-Feng Tian, Po-Shiuan Hsieh
Adipose tissue (AT) inflammation is crucial to the development of obesity-associated insulin resistance. Our aim was to investigate the contribution of COX-2/MIF-mediated crosstalk between hypertrophic adipocytes and macrophages to the etiology of AT inflammation and involvement of CD74 using human SGBS adipocytes, THP-1 macrophages and mice fed a high-fat (HF) diet. The MIF and CD74 mRNA levels in the adipocytes and SVCs (stromal vascular cells) of white fat were highly correlated with body weight, HOMA-IR and adipose macrophage marker expression levels, especially those in SVCs...
May 17, 2018: Clinical Science (1979-)
https://www.readbyqxmd.com/read/29773651/usp25m-protease-regulates-ubiquitin-like-processing-of-tug-proteins-to-control-glut4-glucose-transporter-translocation-in-adipocytes
#8
Estifanos N Habtemichael, Don T Li, Abel Alcázar-Román, Xavier O Westergaard, Muyi Li, Max C Petersen, Hanbing Li, Stephen G DeVries, Eric Li, Omar Julca-Zevallos, Joseph S Wolenski, Jonathan S Bogan
Insulin stimulates the exocytic translocation of specialized vesicles in adipocytes, which inserts GLUT4 glucose transporters into the plasma membrane to enhance glucose uptake.  Previous results support a model in which TUG proteins trap these GLUT4 storage vesicles at the Golgi matrix, and in which insulin triggers endoproteolytic cleavage of TUG to translocate GLUT4.  Here, we identify Usp25m as a protease required for insulin-stimulated TUG cleavage and GLUT4 translocation in adipocytes.  Usp25m is expressed in adipocytes, binds TUG and GLUT4, dissociates from TUG-bound vesicles after insulin addition, and colocalizes with TUG and insulin-responsive cargoes in unstimulated cells...
May 17, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29773163/epicardial-adipose-tissue-may-mediate-deleterious-effects-of-obesity-and-inflammation-on-the-myocardium
#9
REVIEW
Milton Packer
Epicardial adipose tissue has unique properties that distinguish it from other depots of visceral fat. Rather than having distinct boundaries, the epicardium shares an unobstructed microcirculation with the underlying myocardium, and in healthy conditions, produces cytokines that nourish the heart. However, in chronic inflammatory disorders (especially those leading to heart failure with preserved ejection fraction), the epicardium becomes a site of deranged adipogenesis, leading to the secretion of proinflammatory adipokines that can cause atrial and ventricular fibrosis...
May 22, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29772836/soybean-hop-alleviates-estrogen-deficiency-related-bone-loss-and-metabolic-dysfunction-in-ovariectomized-rats-fed-a-high-fat-diet
#10
Dasom Noh, Yeni Lim, Hansol Lee, Hyejin Kim, Oran Kwon
Soybeans and hops have been traditionally used as a natural estrogen replacement therapy and their major active ingredients, isoflavones and prenylflavanones, are known to have estrogenic/antiestrogenic effects depending on the target organ. However, their potential benefits are still subject to controversies. The present study investigated the dual effect of soy isoflavones plus hop prenylflavanones (Soy-Hop) on bone loss and metabolic dysfunction under estrogen deficient condition. Rats were sham-operated ( n = 10) or ovariectomized (OVX; n = 40) and then fed a high-fat diet (HFD) to develop hyperlipidemia in OVX rats within the experimental period of 8 weeks...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772784/capsaicin-in-metabolic-syndrome
#11
REVIEW
Sunil K Panchal, Edward Bliss, Lindsay Brown
Capsaicin, the major active constituent of chilli, is an agonist on transient receptor potential vanilloid channel 1 (TRPV1). TRPV1 is present on many metabolically active tissues, making it a potentially relevant target for metabolic interventions. Insulin resistance and obesity, being the major components of metabolic syndrome, increase the risk for the development of cardiovascular disease, type 2 diabetes, and non-alcoholic fatty liver disease. In vitro and pre-clinical studies have established the effectiveness of low-dose dietary capsaicin in attenuating metabolic disorders...
May 17, 2018: Nutrients
https://www.readbyqxmd.com/read/29771917/the-differentiation-of-preadipocytes-and-gene-expression-related-to-adipogenesis-in-ducks-anas-platyrhynchos
#12
Shasha Wang, Yang Zhang, Qi Xu, Xiaoya Yuan, Wangcheng Dai, Xiaokun Shen, Zhixiu Wang, Guobin Chang, Zhiquan Wang, Guohong Chen
Meat quality is closely related to adipose tissues in ducks, and adipogenesis is controlled by a complex network of transcription factors tightly acting at different stages of differentiation especially in ducks. The aim of this study was to establish the preadipocyte in vitro culture system and understand the biological characteristics of expansion of duck adipocyte tissue at the cellular and molecular level. We isolated pre-adipocytes from the subcutaneous fat of three breeds of duck and differentiated them into mature adipocytes using a mixture of insulin, rosiglitazone, dexamethasone, 3-isobutyl-1-methylxanthine, and oleic acid over 0,2, 4, 6, and 8 days...
2018: PloS One
https://www.readbyqxmd.com/read/29771444/low-level-laser-irradiation-promotes-the-differentiation-of-bone-marrow-stromal-cells-into-osteoblasts-through-the-apn-wnt-%C3%AE-catenin-pathway
#13
R-F Zhang, Q Wang, A-A Zhang, J-G Xu, L-D Zhai, X-M Yang, X-T Liu
OBJECTIVE: The relationship between adiponectin (APN) pathway and Wnt pathway was explored through BMSCs, and the effect of low-level laser irradiation (LLLI) on bone marrow stromal cells (BMSCs) and its mechanism were further studied. MATERIALS AND METHODS: 3-week-old Sprague-Dawley (SD) rats were selected, and mesenchymal stem cells were separately cultured and purified. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was used to analyze cell proliferation...
May 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29769704/effect-of-protocatechuic-acid-on-insulin-responsiveness-and-inflammation-in-visceral-adipose-tissue-from-obese-individuals-possible-role-for-ptp1b
#14
Paulina Ormazabal, Beatrice Scazzocchio, Rosaria Varì, Carmela Santangelo, Massimo D'Archivio, Gianfranco Silecchia, Annunziata Iacovelli, Claudio Giovannini, Roberta Masella
BACKGROUND/OBJECTIVES: The occurrence of chronic inflammation in visceral adipose tissue (VAT) in obese subjects precipitates the development of insulin resistance and type 2 diabetes (T2D). Anthocyanins and their main metabolite protocatechuic acid (PCA) have been demonstrated to stimulate insulin signaling in human adipocytes. The aim of this study was to investigate whether PCA is able to modulate insulin responsiveness and inflammation in VAT from obese (OB) and normal weight (NW) subjects...
May 16, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29769661/circulating-mir-374a-5p-is-a-potential-modulator-of-the-inflammatory-process-in-obesity
#15
Ayo P Doumatey, William J He, Amadou Gaye, Lin Lei, Jie Zhou, Gary H Gibbons, Adebowale Adeyemo, Charles N Rotimi
Obese individuals without expected metabolic co-morbidities are referred to as metabolically healthy obese (MHO). The molecular mechanisms underlying this phenotype remain elusive. MicroRNAs may be involved in the MHO phenotype. To test this hypothesis, we screened 179 serum miRNAs in 20 African-American women (10 MHOs and 10 metabolically abnormal obese individuals -MAO). We identified 8 differentially expressed miRNAs (DEMs) with validation in an independent sample of 64 MHO and 34 MAO. Of the eight DEMs in the screening phase (p ≤ 0...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29768501/secretion-of-autoimmune-antibodies-in-the-human-subcutaneous-adipose-tissue
#16
Daniela Frasca, Alain Diaz, Maria Romero, Seth Thaller, Bonnie B Blomberg
The adipose tissue (AT) contributes to systemic and B cell intrinsic inflammation, reduced B cell responses and secretion of autoimmune antibodies. In this study we show that adipocytes in the human obese subcutaneous AT (SAT) secrete several pro-inflammatory cytokines and chemokines, which contribute to the establishment and maintenance of local and systemic inflammation, and consequent suboptimal immune responses in obese individuals, as we have previously shown. We also show that pro-inflammatory chemokines recruit immune cells expressing the corresponding receptors to the SAT, where they also contribute to local and systemic inflammation, secreting additional pro-inflammatory mediators...
2018: PloS One
https://www.readbyqxmd.com/read/29768259/precise-intradermal-injection-of-nanofat-derived-stromal-cells-combined-with-platelet-rich-fibrin-improves-the-efficacy-of-facial-skin-rejuvenation
#17
Zhi-Jie Liang, Xiang Lu, De-Quan Li, Yi-Dan Liang, Dan-Dan Zhu, Fang-Xiao Wu, Xiao-Lin Yi, Ning He, Yan-Qing Huang, Chao Tang, Hong-Mian Li
BACKGROUND/AIMS: The rejuvenation properties of nanofat grafting have been described in recent years. However, it is not clear whether the clinical efficacy of the procedure is attributable to stem cells or linked to other components of adipose tissue. In this study we isolated nanofat-derived stem cells (NFSCs) to observe their biological characteristics and evaluate the efficacy of precise intradermal injection of nanofat combined with platelet-rich fibrin (PRF) in patients undergoing facial rejuvenation treatment...
May 11, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29768199/the-autism-related-protein-chd8-cooperates-with-c-ebp%C3%AE-to-regulate-adipogenesis
#18
Yasuyuki Kita, Yuta Katayama, Taichi Shiraishi, Takeru Oka, Tetsuya Sato, Mikita Suyama, Yasuyuki Ohkawa, Keishi Miyata, Yuichi Oike, Michiko Shirane, Masaaki Nishiyama, Keiichi I Nakayama
The gene encoding the chromatin remodeler CHD8 is the most frequently mutated gene in individuals with autism spectrum disorder (ASD). Heterozygous mutations in CHD8 give rise to ASD that is often accompanied by macrocephaly, gastrointestinal complaints, and slender habitus. Whereas most phenotypes of CHD8 haploinsufficiency likely result from delayed neurodevelopment, the mechanism underlying slender habitus has remained unknown. Here, we show that CHD8 interacts with CCAAT/enhancer-binding protein β (C/EBPβ) and promotes its transactivation activity during adipocyte differentiation...
May 15, 2018: Cell Reports
https://www.readbyqxmd.com/read/29768198/myocardin-related-transcription-factor-a-promotes-recruitment-of-itga5-profibrotic-progenitors-during-obesity-induced-adipose-tissue-fibrosis
#19
Jean Z Lin, Nabil Rabhi, Stephen R Farmer
Adipose tissue fibrosis is associated with inflammation and insulin resistance in human obesity. In particular, visceral fat fibrosis is correlated with hyperlipidemia and ectopic fat accumulation. Myocardin-related transcription factor A (MRTFA) is an important coactivator that mediates the transcription of extracellular matrix and other fibrogenic genes. Here, we examine the role of MRTFA in the development of adipose tissue fibrosis and identify a signaling pathway that regulates the fate of vascular progenitors...
May 15, 2018: Cell Reports
https://www.readbyqxmd.com/read/29768196/loss-of-abhd15-impairs-the-anti-lipolytic-action-of-insulin-by-altering-pde3b-stability-and-contributes-to-insulin-resistance
#20
Wenmin Xia, Ariane R Pessentheiner, Dina C Hofer, Melina Amor, Renate Schreiber, Gabriele Schoiswohl, Thomas O Eichmann, Evelyn Walenta, Bianca Itariu, Gerhard Prager, Hubert Hackl, Thomas Stulnig, Dagmar Kratky, Thomas Rülicke, Juliane G Bogner-Strauss
Elevated circulating fatty acids (FAs) contribute to obesity-associated metabolic complications, but the mechanisms by which insulin suppresses lipolysis are poorly understood. We show that α/β-hydrolase domain-containing 15 (ABHD15) is required for the anti-lipolytic action of insulin in white adipose tissue (WAT). Neither insulin nor glucose treatments can suppress FA mobilization in global and conditional Abhd15-knockout (KO) mice. Accordingly, insulin signaling is impaired in Abhd15-KO adipocytes, as indicated by reduced AKT phosphorylation, glucose uptake, and de novo lipogenesis...
May 15, 2018: Cell Reports
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