Related Experiment Video
Updated: Aug 21, 2026

Pharmacologic Induction of Epidermal Melanin and Protection Against Sunburn in a Humanized Mouse Model
Published on: September 7, 2013
Melanocortin-4 receptor agonists for the treatment of obesity
1Chiron Corp, 4560 Horton Street, Emeryville, CA 94608, USA. rustum_boyce@chiron.com
Abstract:
The identification of a highly efficacious anti-obesity agent remains an illusive goal. While many avenues of investigation have been pursued, none of the existing compounds claim much more than a 10% reduction in weight in humans (over a one year period with diet and exercise). Nonetheless, the potential reward for fulfilling this unmet medical need has kept interest levels high in the research community. The recent explosion of genetic information has identified numerous potential targets for drug screening. The melanocortin-4 receptor is a promising target and is currently being intensively investigated by many companies and academic research groups.
Insights
Developing effective anti-obesity medications is challenging, with current treatments offering minimal weight loss. The melanocortin-4 receptor presents a promising new target for innovative obesity drug discovery.
Area of Science:
- Pharmacology
- Genetics
- Metabolic Diseases
Background:
- Obesity is a significant global health issue with limited effective pharmacological treatments.
- Existing anti-obesity agents demonstrate modest efficacy, typically achieving less than 10% weight reduction in humans over one year.
- The pursuit of novel anti-obesity agents is driven by a substantial unmet medical need.
Purpose of the Study:
- To highlight the challenges in identifying highly efficacious anti-obesity agents.
- To identify promising molecular targets for the development of new obesity drugs.
- To emphasize the potential of the melanocortin-4 receptor as a therapeutic target.
Main Methods:
- Review of current anti-obesity drug efficacy and limitations.
- Analysis of recent advancements in genetic information for target identification.
- Investigation of the melanocortin-4 receptor as a potential drug target.
Main Results:
- Current anti-obesity drugs show limited effectiveness in human trials.
- Genetic research has revealed numerous potential targets for drug development.
- The melanocortin-4 receptor is identified as a highly promising target.
Conclusions:
- Significant unmet need exists for effective anti-obesity therapies.
- The melanocortin-4 receptor is a key focus for current research and development in obesity pharmacotherapy.
- Continued investigation into the melanocortin-4 receptor may lead to breakthrough treatments for obesity.
Related Concept Videos
Antidepressant Drugs: MAOIs and Other Agents
Glucagon-like Receptor Agonists
GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by the...
Adrenergic Agonists: Indirect-Acting Agents
One mechanism involves depleting stored catecholamines by displacing them from synaptic vesicles. These agents, known as "displacers," are transported into vesicles at the expense of noradrenaline. Examples include amphetamine and tyramine, which lack a catechol moiety, resulting in prolonged action, improved oral bioavailability, and...
Dipeptidyl Peptidase 4 Inhibitors
Adrenergic Agonists: Direct-Acting Agents
These agents can be classified...
Adrenergic Antagonists: Pharmacological Actions of ɑ-Receptor Blockers
α1-blockers: These drugs inhibit α1-adrenoceptors on smooth muscle cells, resulting in vasodilation. This vasodilation lowers blood pressure, making α1-blockers valuable in treating hypertension. Additionally, α1-blockers effectively address urinary obstruction...

