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Ghrelin as a potential anti-obesity target
Tamas L Horvath1, Tamara Castañeda, Mads Tang-Christensen
1Dept. of Ob/Gyn, Yale University School of Medicine, New Haven, CT, USA.
Current Pharmaceutical Design
|May 29, 2003
Summary
Ghrelin, a hunger hormone, is a potential drug target for obesity. Blocking ghrelin may reverse positive energy balance, but compensatory mechanisms or side effects could limit its effectiveness.
Area of Science:
- Endocrinology
- Neuroscience
- Pharmacology
Background:
- Obesity treatment requires targeting endogenous factors promoting positive energy balance.
- Ghrelin, a gastric endocrine agent discovered in 1999, is a potent circulating hunger-inducing factor.
- Ghrelin, an acylated peptide hormone, regulates energy balance and has diverse physiological functions.
Purpose of the Study:
- To explore ghrelin as a potential pharmacological target for obesity treatment.
- To investigate the feasibility of blocking or neutralizing ghrelin action to reverse positive energy balance.
- To consider potential challenges and side effects of ghrelin antagonism in obesity therapy.
Main Methods:
- Review of existing literature on ghrelin's role in energy homeostasis.
- Analysis of ghrelin's mechanism of action in increasing food intake and adiposity.
- Consideration of potential compensatory mechanisms and undesired effects of ghrelin antagonists.
Main Results:
- Ghrelin increases appetite and decreases fat oxidation, promoting positive energy balance.
- The exact mechanisms of ghrelin's action and differential effects of brain- vs. stomach-derived ghrelin are not fully understood.
- Blocking ghrelin is a plausible approach, but may be hindered by compensatory pathways or reveal other biological roles.
Conclusions:
- Ghrelin antagonism presents a potential strategy for obesity pharmacotherapy.
- Further research is needed to elucidate ghrelin's precise mechanisms and potential off-target effects.
- The efficacy of ghrelin antagonists may be limited by compensatory mechanisms or reveal ghrelin's broader physiological roles, such as in cardiovascular function, cell proliferation, and reproduction.