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The melanocortin-4 receptor: physiology, pharmacology, and pathophysiology

Ya-Xiong Tao1

  • 1Department of Anatomy, Physiology, and Pharmacology, Auburn University, Alabama 36849-5519, USA. taoyaxi@auburn.edu

Endocrine Reviews
|March 2, 2010
PubMed

Insights

Mutations in the melanocortin-4 receptor (MC4R) are the leading genetic cause of obesity. Research has uncovered MC4R

Area of Science:

  • Endocrinology and Metabolism
  • Genetics and Molecular Biology
  • Neuroscience

Background:

  • The melanocortin-4 receptor (MC4R) was cloned in 1993, with its role in energy homeostasis elucidated through studies in mice and humans.
  • MC4R gene mutations are the most prevalent cause of monogenic obesity, with over 150 identified variants.

Purpose of the Study:

  • To comprehensively review the multifaceted roles of MC4R beyond energy homeostasis.
  • To explore the pharmacology, signaling pathways, and regulation of MC4R.
  • To discuss the pathophysiology of MC4R in obesity and potential therapeutic strategies.

Main Methods:

  • Literature review of studies on MC4R cloning, functional characterization, and genetic analysis.
  • Analysis of research on MC4R's physiological functions, including energy balance, cardiovascular health, and reproduction.
  • Examination of pharmacological studies on MC4R ligands, signaling, and therapeutic interventions for MC4R-related disorders.

Main Results:

  • MC4R plays critical roles in energy homeostasis, cachexia, cardiovascular function, glucose/lipid metabolism, reproduction, and neurological processes.
  • Over 150 distinct MC4R mutations are linked to monogenic obesity, highlighting its significance in metabolic regulation.
  • Pharmacological approaches, including small molecules and pharmacological chaperones, show promise for treating MC4R-related conditions.

Conclusions:

  • MC4R is a key regulator of numerous physiological processes, and its dysfunction is a major cause of obesity.
  • Understanding MC4R's complex roles and pathophysiology is crucial for developing targeted therapies.
  • Therapeutic strategies aimed at modulating MC4R activity offer potential for treating obesity and related metabolic disorders.

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