期刊
CELL METABOLISM
卷 31, 期 5, 页码 909-+出版社
CELL PRESS
DOI: 10.1016/j.cmet.2020.03.017
关键词
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资金
- IU Simon Cancer Center Support Grant [P30 CA082709]
- National Institutes of Health (NIH) [5U2C-DK093000]
- Career Development Award from the American Diabetes Association [1-18-JDF-017]
- NIH [DK123075]
- Allocation Jeune Chercheur from the Societe Francophone du Diabete
- CIHR
Perturbations in carbohydrate, lipid, and protein metabolism contribute to obesity- induced type 2 diabetes (T2D), though whether alterations in ketone body metabolism influence T2D pathology is unknown. We report here that activity of the rate-limiting enzyme for ketone body oxidation, succinyl-CoA:3-ketoacid-CoA transferase (SCOT/Oxct1), is increased in muscles of obese mice. We also found that the diphenylbutylpiperidine pimozide, which is approved to suppress tics in individuals with Tourette syndrome, is a SCOT antagonist. Pimozide treatment reversed obesity-induced hyperglycemia in mice, which was phenocopied in mice with muscle-specific Oxct1/SCOT deficiency. These actions were dependent on pyruvate dehydrogenase (PDH/Pdha1) activity, the rate-limiting enzyme of glucose oxidation, as pimozide failed to alleviate hyperglycemia in obese mice with a muscle-specific Pdha1/PDH deficiency. This work defines a fundamental contribution of enhanced ketone body oxidation to the pathology of obesity-induced T2D, while suggesting pharmacological SCOT inhibition as a new class of anti-diabetes therapy.
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