Title | Dissociation of Adaptive Thermogenesis from Glucose Homeostasis in Microbiome-Deficient Mice. |
Publication Type | Journal Article |
Year of Publication | 2020 |
Authors | Krisko TI, Nicholls HT, Bare CJ, Holman CD, Putzel GG, Jansen RS, Sun N, Rhee KY, Banks AS, Cohen DE |
Journal | Cell Metab |
Volume | 31 |
Issue | 3 |
Pagination | 592-604.e9 |
Date Published | 2020 03 03 |
ISSN | 1932-7420 |
Abstract | Recent studies suggest that a key mechanism whereby the gut microbiome influences energy balance and glucose homeostasis is through the recruitment of brown and beige adipocytes, primary mediators of the adaptive thermogenic response. To test this, we assessed energy expenditure and glucose metabolism in two complementary mouse models of gut microbial deficiency, which were exposed to a broad range of thermal and dietary stresses. Neither ablation of the gut microbiome, nor the substantial microbial perturbations induced by cold ambient temperatures, influenced energy expenditure during cold exposure or high-fat feeding. Nevertheless, we demonstrated a critical role for gut microbial metabolism in maintaining euglycemia through the production of amino acid metabolites that optimized hepatic TCA (tricarboxylic acid) cycle fluxes in support of gluconeogenesis. These results distinguish the dispensability of the gut microbiome for the regulation of energy expenditure from its critical contribution to the maintenance of glucose homeostasis. |
DOI | 10.1016/j.cmet.2020.01.012 |
Alternate Journal | Cell Metab |
PubMed ID | 32084379 |
Grant List | R01 DK103046 / DK / NIDDK NIH HHS / United States R01 DK107717 / DK / NIDDK NIH HHS / United States T32 DK007533 / DK / NIDDK NIH HHS / United States P30 DK034854 / DK / NIDDK NIH HHS / United States S10 OD020100 / OD / NIH HHS / United States |