What Is Melanocortin Receptor?
Melanocortin receptors (MC1R through MC5R) are a family of G-protein coupled receptors that mediate pigmentation, appetite, sexual function, and inflammation. Key targets for peptides like Melanotan and PT-141.
Detailed Explanation
The melanocortin receptor system comprises five receptor subtypes (MC1R through MC5R) with distinct tissue distributions and functions. MC1R, found primarily on melanocytes, controls skin and hair pigmentation and is the primary target of Melanotan I (Afamelanotide). MC3R and MC4R in the hypothalamus regulate energy homeostasis, appetite, and sexual function; MC4R activation by PT-141 (Bremelanotide) produces pro-sexual effects, while MC4R agonism also reduces food intake. MC2R is the ACTH receptor in the adrenal cortex. MC5R regulates exocrine gland secretion. Alpha-MSH is the primary endogenous ligand, and synthetic melanocortin peptides vary in their receptor selectivity, explaining their different effect profiles.
Related Peptides
Related Terms
Peptide
A peptide is a short chain of amino acids linked by peptide bonds, typically containing 2 to 50 amino acids. Peptides are smaller than proteins and serve as signaling molecules, hormones, and neurotransmitters in the body.
Growth Hormone Secretagogue (GHS)
A growth hormone secretagogue is a compound that stimulates the pituitary gland to produce and release growth hormone. GHS peptides include GHRP-2, GHRP-6, Ipamorelin, and Hexarelin.
Research & Educational Use Only
All content is for informational and research purposes only. This site does not provide medical advice, diagnosis, or treatment. Consult a qualified healthcare professional before using any peptide or supplement.
The information presented here is compiled from published research studies and is intended for informational purposes only. Individual results may vary. Always consult with a licensed healthcare provider.