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Incretins include glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), which stimulate insulin secretion post-meals. In type 2 diabetes, GIP's efficacy is reduced, making GLP-1 a viable drug target. GIP originates from preproGIP.
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Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
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Enteroendocrine cells, accounting for only 1% of stomach epithelial cells, play a significant role in digestion and are classified by their digestive hormone secretions.
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Related Experiment Video

Updated: Jul 11, 2025

A RAPID Method for Blood Processing to Increase the Yield of Plasma Peptide Levels in Human Blood
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Ghrelin.

Miguel López1, Ruben Nogueiras2

  • 1Department of Physiology, CIMUS, University of Santiago de Compostela, Santiago de Compostela, Spain; CIBER Fisiopatologia de la Obesidad y Nutrición (CIBERobn), Spain.

Current Biology : CB
|November 7, 2023
PubMed
Summary

Researchers introduce ghrelin, a peptide hormone that stimulates appetite and growth hormone release, highlighting its key physiological functions in metabolic regulation.

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Area of Science:

  • Endocrinology
  • Metabolic Research
  • Physiology

Background:

  • Ghrelin is an endogenous peptide hormone.
  • Its primary roles in appetite stimulation and growth hormone secretion are recognized.
  • Understanding ghrelin's functions is crucial for metabolic and endocrine research.

Purpose of the Study:

  • To introduce the peptide ghrelin.
  • To elucidate the physiological functions of ghrelin.
  • To highlight ghrelin's roles in appetite and growth hormone release.

Main Methods:

  • Literature review and synthesis.
  • Introduction of ghrelin as a key endocrine factor.
  • Description of ghrelin's physiological actions.

Main Results:

  • Ghrelin's function as a potent appetite stimulant was detailed.
  • Ghrelin's role in promoting growth hormone release was explained.
  • The peptide's significance in physiological regulation was established.

Conclusions:

  • Ghrelin is a critical peptide hormone with significant physiological roles.
  • Its functions in appetite and growth hormone regulation are essential.
  • Further research into ghrelin pathways may offer therapeutic insights.