Yan, ShengminZhou, JunZhang, HaoLin, ZhenKhambu, BilonLiu, GangMa, MichelleChen, XiaoyunChalasani, NagaYin, Xiao-Ming2023-09-282023-09-282022Yan S, Zhou J, Zhang H, et al. Promotion of diet-induced obesity and metabolic syndromes by BID is associated with gut microbiota. Hepatol Commun. 2022;6(12):3349-3362. doi:10.1002/hep4.2052https://hdl.handle.net/1805/35874A growing body of evidence has indicated an expanding functional network of B-cell lymphoma 2 (BCL-2) family proteins beyond regulation of cell death and survival. Here, we examined the role and mechanisms of BH3 interacting-domain death agonist (BID), a pro-death BCL-2 family member, in the development of diet-induced metabolic dysfunction. Mice deficient in bid (bid-/- ) were resistant to high-fat diet (HFD)-induced obesity, hepatic steatosis, and dyslipidemia with an increased insulin sensitivity. Indirect calorimetry analysis indicated that bid deficiency increased metabolic rate and decreased respiratory exchange ratio, suggesting a larger contribution of lipids to overall energy expenditure. While expression of several genes related to lipid accumulation was only increased in wild-type livers, metabolomics analysis revealed a consistent reduction in fatty acids but an increase in certain sugars and Krebs cycle intermediates in bid-/- livers. Gut microbiota (GM) analysis indicated that HFD induced gut dysbiosis with differential patterns in wild-type and in bid-/- mice. Notably, abrogation of GM by antibiotics during HFD feeding eliminated the beneficial effects against obesity and hepatic steatosis conferred by the bid deficiency. Conclusion: These results indicate that the protective role of bid-deficiency against diet-induced metabolic dysfunction interacts with the function of GM.en-USAttribution 4.0 InternationalHigh-fat dietGastrointestinal microbiomeMetabolic syndromeObesityArticle