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Benign form of monogenic obesity conferred by the melanocortin 4 receptor

Anke Hinney1, Triinu Peters1, Luisa Sophie Rajcsanyi1

  • 1Section of Molecular Genetics in Mental Disorders, LVR-University Hospital Essen, University of Duisburg-Essen, Essen, Germany; Institute of Sex- and Gender-Sensitive Medicine, University Hospital Essen, Essen, Germany; Center for Translational and Behavioural Neuroscience, University Hospital Essen, Essen, Germany.

Cell Metabolism
|January 7, 2026
PubMed

Insights

Mutations in the melanocortin 4 receptor (MC4R) cause severe obesity. Surprisingly, these individuals show protection against dyslipidemia and cardiovascular diseases, despite their condition.

Area of Science:

  • Genetics and Endocrinology
  • Cardiovascular Health
  • Metabolic Disorders

Background:

  • Severe obesity can result from mutations affecting the melanocortin 4 receptor (MC4R).
  • MC4R signaling is crucial for regulating energy balance and body weight.

Purpose of the Study:

  • To investigate the cardiovascular and metabolic health of individuals with MC4R-deficient obesity.
  • To determine if MC4R mutations confer protection against dyslipidemia and cardiovascular diseases.

Main Methods:

  • Genetic analysis to identify MC4R mutations.
  • Clinical assessment of lipid profiles and cardiovascular risk factors.
  • Comparison of health outcomes between affected individuals and control groups.

Main Results:

  • Individuals with MC4R mutations experience severe obesity.
  • Unexpectedly, these individuals exhibit lower prevalence of dyslipidemia.
  • Reduced incidence of cardiovascular diseases observed in the study cohort.

Conclusions:

  • MC4R deficiency, while causing obesity, may offer a protective effect against metabolic and cardiovascular complications.
  • Further research is warranted to understand the underlying mechanisms of this protection.
  • This finding opens new avenues for therapeutic strategies targeting MC4R pathways.

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