Microbiota-gut-adipose axis: butyrate-mediated the improvement effect on inflammatory response and fatty acid oxidation dysregulation attenuates obesity in sleep-restricted mice.

BACKGROUND: Insufficient sleep was considered as a substantial cause of obesity. The present study further explored the mechanism whereby sleep restriction (SR)-mediated intestinal dysbiosis induced metabolic disorder and ultimately lead to obesity in mice and the improvement effect of butyrate exerting on it.

METHODS: A continuous 3 months SR mouse model with or without butyrate supplementation and fecal microbiota transplantation to explore the key role of intestinal microbiota in butyrate improving inflammatory response in inguinal white adipose tissue (iWAT) and fatty acid oxidation dysfunction in brown adipose tissue (BAT), further ameliorating SR-induced obesity.

RESULTS: SR-mediated gut microbiota dysbiosis (down-regulation in butyrate level and up-regulation in LPS level) induced intestinal permeability increase and inflammatory response in iWAT and fatty acid oxidation dysfunction in BAT, ultimately resulting in obesity. Further, we demonstrated butyrate ameliorated gut microbiota homeostasis, suppressed inflammatory response via GPR43/LPS/TLR4/MyD88/GSK-3β/β-catenin loop in iWAT and restored fatty acid oxidation function via HDAC3/PPARα/PGC-1α/UCP1/Calpain1 pathway in BAT, ultimately reversing SR-induced obesity.

CONCLUSIONS: We revealed that gut dysbiosis is a key factor for SR-induced obesity and provided a better understanding of the effects of butyrate. We further expected that reversing SR-induced obesity by improving microbiota-gut-adipose axis disorder could be a possible treatment for metabolic diseases.