Cited by 110Drug Transport and Resistance MechanismsGastrointestinal motility and disordersCholesterol and Lipid Metabolism

Neuro-humoral signalling by bile acids and the TGR5 receptor in the gastrointestinal tract

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Bunnett, Nigel W.·2014·The Journal of Physiology

Abstract

In addition to their role in the digestion and absorption of dietary fats, bile acids (BAs) are tightly regulated signalling molecules. Their levels in the intestinal lumen, circulation and tissues fluctuate after feeding and fasting, and as a result of certain diseases and therapies. BAs regulate many cell types in the gut wall and beyond by activating nuclear and plasma membrane receptors. Of these, the G protein-coupled receptor TGR5 has emerged as a key mediator of the non-genomic actions of BAs. TGR5 is a cell-surface receptor that couples to Gαs, formation of cAMP, activation of protein kinase A and extracellular signal-regulated kinases, and inhibition of inflammatory signalling pathways. TGR5 has been implicated in mediating the actions of BAs on secretion of glucagon-like peptide 1 and glucose homeostasis, gastrointestinal motility and transit, electrolyte and fluid transport in the colon, bile formation and secretion, sensory transduction and inflammation. TGR5 agonists have been developed as treatments for metabolic, inflammatory and digestive disorders, and emerging evidence suggests that TGR5 mutations are associated with inflammatory diseases. Thus, TGR5 plays an important role in the normal processes of digestion and is a new therapeutic target for important digestive diseases.

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Crossref · 10.1113/jphysiol.2014.271155

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  • Bile acids stimulate the release of 5-hydroxytryptamine and calcitonin gene-related peptide from enterochromaffin cells and intrinsic primary afferent neurons by activating TGR5, leading to the bowel peristaltic reflex.

    “BAs are known to stimulate the release of 5-hydroxytryptamine (5-HT) and calcitonin gene-related peptide from enterochromaffin cells and intrinsic primary afferent neurons by activating the G protein-coupled BA receptor (TGR5), leading to the bowel peristaltic reflex [ 38 , 39 ].”

    From Role of gut microbiota in functional constipation (2021) · cites this paper as [39]

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Authors
Bunnett, N. W.
Affiliations
The University of Melbourne (AU)
Corresponding author
Bunnett, Nigel W.
Venue
The Journal of Physiology
Publisher
Wiley
Published
2014-04-14
Volume
592
Issue
14
Pages
2943-2950
ISSN
  • 0022-3751 (ISSN-L)
  • 1469-7793
OpenAlex
W1581234793
Cited by
110
References
35
Citations by year
2026: 10 · 2025: 8 · 2024: 14 · 2023: 9 · 2022: 10 · 2021: 14 · 2020: 7 · 2019: 10 · 2018: 8 · 2017: 7 · 2016: 5 · 2015: 6 · 2014: 2
FWCI
0.76
Type
journal article
Language
en
Open access
Locations
  • The Journal of Physiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • NHMRC (63303, 1049682, 1031886)
  • Monash University
Topics
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
Keywords
bile acids, TGR5, G protein-coupled receptors, gastrointestinal tract, cAMP signaling, protein kinase A, ERK activation, glucagon-like peptide-1, glucose homeostasis, gastrointestinal motility, bile formation, intestinal inflammation, TGR5 agonists, gastrointestinal diseases
MeSH terms
Animals, Bile Acids and Salts, Humans, Gastrointestinal Tract, Receptors, G-Protein-Coupled

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