High temperature and humidity in the environment disrupt bile acid metabolism, the gut microbiome, and GLP-1 secretion in mice

Author:

Chen Song,Hu Zongren,Tang Jianbang,Zhu Haipeng,Zheng Yuhua,Xiao Jiedong,Xu Youhua,Wang YaoORCID,Luo Yi,Mo Xiaoying,Wu YalanORCID,Guo JianwenORCID,Zhang YongliangORCID,Luo HuanhuanORCID

Abstract

AbstractHigh temperature and humidity in the environment are known to be associated with discomfort and disease, yet the underlying mechanisms remain unclear. We observed a decrease in plasma glucagon-like peptide-1 levels in response to high-temperature and humidity conditions. Through 16S rRNA gene sequencing, alterations in the gut microbiota composition were identified following exposure to high temperature and humidity conditions. Notably, changes in the gut microbiota have been implicated in bile acid synthesis. Further analysis revealed a decrease in lithocholic acid levels in high-temperature and humidity conditions. Subsequent in vitro experiments demonstrated that lithocholic acid increases glucagon-like peptide-1 secretion in NCI-H716 cells. Proteomic analysis indicated upregulation of farnesoid X receptor expression in the ileum. In vitro experiments revealed that the combination of lithocholic acid with farnesoid X receptor inhibitors resulted in a significant increase in GLP-1 levels compared to lithocholic acid alone. In this study, we elucidate the mechanism by which reduced lithocholic acid suppresses glucagon-like peptide 1 via farnesoid X receptor activation under high-temperature and humidity condition.

Funder

National Natural Science Foundation of China

Guangzhou University of Chinese Medicine

Publisher

Springer Science and Business Media LLC

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