Accumulation of succinate controls activation of adipose tissue thermogenesis.


Type
Article
Change log
Authors
Mills, Evanna L 
Pierce, Kerry A 
Jedrychowski, Mark P 
Garrity, Ryan 
Winther, Sally 
Abstract

Thermogenesis by brown and beige adipose tissue, which requires activation by external stimuli, can counter metabolic disease1. Thermogenic respiration is initiated by adipocyte lipolysis through cyclic AMP-protein kinase A signalling; this pathway has been subject to longstanding clinical investigation2-4. Here we apply a comparative metabolomics approach and identify an independent metabolic pathway that controls acute activation of adipose tissue thermogenesis in vivo. We show that substantial and selective accumulation of the tricarboxylic acid cycle intermediate succinate is a metabolic signature of adipose tissue thermogenesis upon activation by exposure to cold. Succinate accumulation occurs independently of adrenergic signalling, and is sufficient to elevate thermogenic respiration in brown adipocytes. Selective accumulation of succinate may be driven by a capacity of brown adipocytes to sequester elevated circulating succinate. Furthermore, brown adipose tissue thermogenesis can be initiated by systemic administration of succinate in mice. Succinate from the extracellular milieu is rapidly metabolized by brown adipocytes, and its oxidation by succinate dehydrogenase is required for activation of thermogenesis. We identify a mechanism whereby succinate dehydrogenase-mediated oxidation of succinate initiates production of reactive oxygen species, and drives thermogenic respiration, whereas inhibition of succinate dehydrogenase supresses thermogenesis. Finally, we show that pharmacological elevation of circulating succinate drives UCP1-dependent thermogenesis by brown adipose tissue in vivo, which stimulates robust protection against diet-induced obesity and improves glucose tolerance. These findings reveal an unexpected mechanism for control of thermogenesis, using succinate as a systemically-derived thermogenic molecule.

Description
Keywords
Adipocytes, Adipose Tissue, Brown, Adipose Tissue, White, Animals, Female, Male, Metabolomics, Mice, Obesity, Oxidation-Reduction, Reactive Oxygen Species, Succinate Dehydrogenase, Succinic Acid, Thermogenesis, Uncoupling Protein 1
Journal Title
Nature
Conference Name
Journal ISSN
0028-0836
1476-4687
Volume Title
560
Publisher
Springer Science and Business Media LLC
Sponsorship
Medical Research Council (MC_UU_00015/3)
Wellcome Trust (110159/Z/15/Z)