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Ghrelin and the gut.

T L Peeters1

  • 1Gut Peptide Laboratory, Faculty of Medicine, University of Leuven, Leuven, Belgium. theo.peeters@med.kuleuven.be

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PubMed
Summary
This summary is machine-generated.

Ghrelin, a stomach hormone, activates receptors throughout the body, influencing gut motility and gastric function. Its agonists are being developed for disorders like diabetic gastroparesis.

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Area of Science:

  • Gastroenterology
  • Endocrinology
  • Neuroscience

Background:

  • Ghrelin is the endogenous ligand for the ghrelin receptor (GHS-R).
  • While identified in the pituitary, ghrelin is most abundant in the stomach, with receptors found in major organ systems.
  • Ghrelin belongs to a new gut peptide family with motilin, suggesting evolutionary gene duplication.

Purpose of the Study:

  • To review the multifaceted roles of ghrelin beyond its initial identification.
  • To highlight ghrelin's impact on gastrointestinal functions and its therapeutic potential.
  • To discuss the mechanisms underlying ghrelin's diverse physiological effects.

Main Methods:

  • Literature review of ghrelin's physiological functions and receptor distribution.
  • Analysis of ghrelin's effects on gastric emptying, acid secretion, and inflammation.
  • Examination of ghrelin receptor signaling pathways and therapeutic applications.

Main Results:

  • Ghrelin exhibits significant motor effects in the gut, including gastric emptying and migrating motor complex induction.
  • Ghrelin influences gastric acid secretion, provides gastroprotection, and modulates intestinal inflammation.
  • Ghrelin's effects are mediated via central, vagal, enteric neural, and immune cell receptors.

Conclusions:

  • Ghrelin is a key regulator of gastrointestinal function with widespread receptor distribution.
  • Ghrelin agonists, such as TZP-102, show promise for treating hypomotility disorders like diabetic gastroparesis.
  • Further research into ghrelin signaling pathways could unlock new therapeutic strategies.