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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

Diabetes. 2014;.

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Abstract

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.

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Digital Object Identifier:
10.2337/db13-1835
Pubmed Identifier:
25190567
Pii Identifier:
db13-1835
Access state:
Active

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Manchester eScholar ID:
uk-ac-man-scw:236672
Created by:
Loudon, Andrew
Created:
10th October, 2014, 12:48:38
Last modified by:
Loudon, Andrew
Last modified:
10th October, 2014, 12:48:38

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