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Updated: May 2, 2026

Pharmacologic Induction of Epidermal Melanin and Protection Against Sunburn in a Humanized Mouse Model
Published on: September 7, 2013
Synaptic changes induced by melanocortin signalling
Abstract:
The melanocortin system has a well-established role in the regulation of energy homeostasis, but there is growing evidence of its involvement in memory, nociception, mood disorders and addiction. In this Review, we focus on the role of the melanocortin 4 receptor and provide an integrative view of the molecular mechanisms that lead to melanocortin-induced changes in synaptic plasticity within these diverse physiological systems. We also highlight the importance of melanocortin peptides and receptors in chronic pain syndromes, memory impairments, depression and drug abuse, and the possibility of targeting them for therapeutic purposes.
Insights
The melanocortin 4 receptor influences energy balance, memory, mood, and addiction. Targeting this receptor offers therapeutic potential for various neurological and psychiatric conditions.
Area of Science:
- Neuroscience
- Endocrinology
- Pharmacology
Background:
- The melanocortin system regulates energy homeostasis.
- Emerging evidence links it to memory, pain, mood, and addiction.
Purpose of the Study:
- To review the role of the melanocortin 4 receptor (MC4R).
- To integrate molecular mechanisms of MC4R in synaptic plasticity.
- To highlight therapeutic potential in neurological and psychiatric disorders.
Main Methods:
- Literature review of studies on the melanocortin system and MC4R.
- Analysis of molecular pathways involved in synaptic plasticity.
- Synthesis of evidence linking MC4R to various physiological functions.
Main Results:
- MC4R plays a crucial role beyond energy homeostasis.
- Molecular mechanisms involve changes in synaptic plasticity.
- MC4R is implicated in chronic pain, memory deficits, depression, and drug abuse.
Conclusions:
- MC4R is a key regulator in diverse physiological systems.
- Targeting MC4R offers promising therapeutic strategies.
- Further research can elucidate MC4R's full potential in treating complex disorders.
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