期刊
NATURE
卷 572, 期 7771, 页码 614-+出版社
NATURE PORTFOLIO
DOI: 10.1038/s41586-019-1503-x
关键词
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资金
- NIH [DK97441, DK112268, U19CA179513, P30 DK063720]
- Edward Mallinckrodt Jr. Foundation
- American Diabetes Association Pathways Award [1-16-INI-17]
- AMED-CREST from the Japan Agency for Medical Research and Development
- JSPS Fellowships
Branched-chain amino acid (BCAA; valine, leucine and isoleucine) supplementation is often beneficial to energy expenditure; however, increased circulating levels of BCAA are linked to obesity and diabetes. The mechanisms of this paradox remain unclear. Here we report that, on cold exposure, brown adipose tissue (BAT) actively utilizes BCAA in the mitochondria for thermogenesis and promotes systemic BCAA clearance in mice and humans. In turn, a BAT-specific defect in BCAA catabolism attenuates systemic BCAA clearance, BAT fuel oxidation and thermogenesis, leading to diet-induced obesity and glucose intolerance. Mechanistically, active BCAA catabolism in BAT is mediated by SLC25A44, which transports BCAAs into mitochondria. Our results suggest that BAT serves as a key metabolic filter that controls BCAA clearance via SLC25A44, thereby contributing to the improvement of metabolic health.
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