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Hyocholic acid species improve glucose homeostasis through a distinct TGR5 and FXR signaling mechanism

  • Xiaojiao Zheng
  • , Tianlu Chen
  • , Runqiu Jiang
  • , Aihua Zhao
  • , Qing Wu
  • , Junliang Kuang
  • , Dongnan Sun
  • , Zhenxing Ren
  • , Mengci Li
  • , Mingliang Zhao
  • , Shouli Wang
  • , Yuqian Bao
  • , Huating Li
  • , Cheng Hu
  • , Bing Dong
  • , Defa Li
  • , Jiayu Wu
  • , Jialin Xia
  • , Xuemei Wang
  • , Ke Lan
  • Cynthia Rajani, Guoxiang Xie, Aiping Lu, Weiping Jia*, Changtao Jiang*, Wei Jia*
*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

377 Citations (Scopus)

Abstract

Hyocholic acid (HCA) and its derivatives are found in trace amounts in human blood but constitute approximately 76% of the bile acid (BA) pool in pigs, a species known for its exceptional resistance to type 2 diabetes. Here, we show that BA depletion in pigs suppressed secretion of glucagon-like peptide-1 (GLP-1) and increased blood glucose levels. HCA administration in diabetic mouse models improved serum fasting GLP-1 secretion and glucose homeostasis to a greater extent than tauroursodeoxycholic acid. HCA upregulated GLP-1 production and secretion in enteroendocrine cells via simultaneously activating G-protein-coupled BA receptor, TGR5, and inhibiting farnesoid X receptor (FXR), a unique mechanism that is not found in other BA species. We verified the findings in TGR5 knockout, intestinal FXR activation, and GLP-1 receptor inhibition mouse models. Finally, we confirmed in a clinical cohort, that lower serum concentrations of HCA species were associated with diabetes and closely related to glycemic markers.

Original languageEnglish
Pages (from-to)791-803.E7
Number of pages20
JournalCell Metabolism
Volume33
Issue number4
Early online date17 Dec 2020
DOIs
Publication statusPublished - 6 Apr 2021

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

User-Defined Keywords

  • bile acid
  • diabetes
  • FXR
  • glucagon-like peptide-1
  • glucose homeostasis
  • hyocholic acid
  • hyodeoxycholic acid
  • insulin
  • pig
  • TGR5

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