MT-2

MT-2 (Melanotan II) is a synthetic cyclic heptapeptide analogue of alpha-melanocyte-stimulating hormone ($\alpha$-MSH). Specifically, it functions as a non-selective agonist across multiple melanocortin receptor subtypes, including MC1R, MC3R, MC4R, and MC5R. mt-2 peptide

In contrast to its predecessor MT-1, this broad multi-receptor engagement grants MT-2 a diverse pharmacological profile. Mechanistically, investigations focusing on its binding at the MC1 receptor have demonstrated potent melanogenic effects, driving eumelanin production in cutaneous cells to promote pigmentation independent of ultraviolet (UV) radiation. mt-2 peptide

Consequently, research into its activity at the MC4 receptor has been particularly extensive. In addition, studies indicate that appetite suppression, energy balance regulation, and sexual behavior modulation represent key downstream outcomes mediated by central MC4R stimulation. Furthermore, preclinical trials have highlighted MT-2’s capacity to facilitate libido and erectile function via central nervous system pathways. Overall, its multi-receptor activity renders MT-2 an essential research tool for probing the pleiotropic functions of the melanocortin system in both peripheral physiology and central neuroendocrine control.