Open AccessIntestinal Farnesoid X Receptor and Takeda G Protein Couple Receptor 5 Signaling in Metabolic Regulation
Author(s) -
John Y.L. Chiang,
Preeti Pathak,
Hailiang Liu,
Ajay C. Donepudi,
Jessica M. Ferrell,
Shan Boehme
Publication year - 2017
Publication title -
digestive diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.879
H-Index - 66
eISSN - 1421-9875
pISSN - 0257-2753
DOI - 10.1159/000450981
Subject(s) - g protein coupled bile acid receptor , farnesoid x receptor , bile acid , medicine , endocrinology , lipid metabolism , biology , nuclear receptor , biochemistry , transcription factor , gene
Bile acids play a critical role in the regulation of glucose, lipid and energy metabolisms by activating the nuclear bile acid receptor farnesoid X receptor (FXR) and membrane G protein-coupled bile acid receptor-1 (aka takeda G protein couple receptor 5, TGR5) signaling. Paradoxical roles of FXR in the regulation of glucose and lipid metabolism and metabolic disorder have been reported recently. The activation or inhibition of intestinal FXR signaling has been shown to improve insulin and glucose sensitivity and energy metabolism to prevent diabetes, obesity and non-alcoholic fatty liver disease (NAFLD). TGR5 has an anti-inflammatory function in the intestine and stimulates glucagon-like peptide-1 (GLP-1) secretion in the intestine to stimulate insulin secretion from the pancreas. The role of TGR5 in metabolism and metabolic regulation is not clear and warrants further study. FXR and TGR5 are co-expressed in the ileum and colon. These 2 bile acid-activated receptors may cooperate to stimulate GLP-1 secretion and improve hepatic metabolism. FXR and TGR5 dual agonists may have therapeutic potential for treating diabetes and NAFLD.