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Ghrelin as a starvation signal
1Frontier Science Research Center, University of Miyazaki, Miyazaki 889-1692, Japan.
Obesity Research & Clinical Practice
|December 17, 2013
Summary
Ghrelin, a gastrointestinal hormone, stimulates feeding and growth hormone secretion. This overview details its discovery, role in disease, and how it triggers feeding behaviors.
Area of Science:
- Endocrinology
- Gastroenterology
- Neuroscience
Background:
- Ghrelin is a 28-amino acid gastrointestinal hormone.
- It acts as the endogenous ligand for the growth hormone secretagogue receptor (GHS-R).
- The Ser-3 residue undergoes octanoylation, a key post-translational modification.
Purpose of the Study:
- To provide an overview of ghrelin's discovery.
- To explore its pathophysiological significance.
- To elucidate the mechanism of ghrelin-induced feeding.
Main Methods:
- Literature review of ghrelin research.
- Analysis of ghrelin's molecular structure and function.
- Discussion of its physiological and pathological roles.
Main Results:
- Ghrelin stimulates appetite and growth hormone release.
- It plays a role in energy balance and conservation.
- The octanoylation modification is crucial for its activity.
Conclusions:
- Ghrelin is a critical regulator of feeding behavior and energy homeostasis.
- Understanding ghrelin's mechanisms offers therapeutic potential.
- Further research is needed to fully explore its complex roles.
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