Gut-derived signaling molecules and vagal afferents in the control of glucose and energy homeostasis.

Details

Serval ID
serval:BIB_27014C39FE32
Type
Article: article from journal or magazin.
Publication sub-type
Review (review): journal as complete as possible of one specific subject, written based on exhaustive analyses from published work.
Collection
Publications
Institution
Title
Gut-derived signaling molecules and vagal afferents in the control of glucose and energy homeostasis.
Journal
Current Opinion in Clinical Nutrition and Metabolic Care
Author(s)
Thorens B., Larsen P.J.
ISSN
1363-1950[print], 1363-1950[linking]
Publication state
Published
Issued date
2004
Peer-reviewed
Oui
Volume
7
Number
4
Pages
471-478
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S. ; Review Publication Status: ppublish
Abstract
PURPOSE OF REVIEW: The control of glucose and energy homeostasis, including feeding behaviour, is tightly regulated by gut-derived peptidic and nonpeptidic endocrine mediators, autonomic nervous signals, as well as nutrients such as glucose. We will review recent findings on the role of the gastrointestinal tract innervation and of portal vein glucose sensors; we will review selected data on the action of gastrointestinally released hormones. RECENT FINDINGS: The involvement of mechanosensory vagal afferents in postprandial meal termination has been clarified using mouse models with selective impairments of genes required for development of mechanosensory fibres. These activate central glucogen-like peptide-1/glucogen-like peptide-2 containing ascending pathways linking the visceroceptive brainstem neurons to hypothalamic nuclei. Mucosal terminals comprise the chemosensory vagal afferents responsive to postprandially released gastrointestinal hormones. The mechanism by which the hepatoportal glucose sensor stimulates glucose utilization by muscles was demonstrated, using genetically modified mice, to be insulin-independent but to require GLUT4 and AMP-kinase. This sensor is a key site of glucogen-like peptide-1 action and plays a critical role in triggering first phase insulin secretion. PeptideYY and ghrelin target intracerebral receptors as they are bidirectionally transported across the blood brain barrier. The anorectic functions of peripherally released peptideYY may however be mediated both via vagal afferents and intracerebral Y2 receptors in the brainstem and arcuate nucleus. SUMMARY: These recent findings demonstrate that the use of improved anatomical and physiological techniques and animal models with targeted gene modifications lead to an improved understanding of the complex role of gastrointestinal signals in the control of energy homeostasis.
Keywords
Afferent Pathways/physiology, Animals, Appetite Regulation/physiology, Digestive System/innervation, Digestive System Physiological Phenomena, Eating, Energy Metabolism/physiology, Feeding Behavior, Glucose/metabolism, Humans, Neuropeptides/physiology, Signal Transduction, Vagus Nerve/physiology
Pubmed
Web of science
Create date
24/01/2008 13:41
Last modification date
20/08/2019 13:05
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