MT-II stimulates melanogenesis via MC1R on melanocytes darker pigmentation following short subcutaneous dosing. In the CNS, MT-II can trigger erections without sexual stimulation, pointing to central melanocortin circuitry (hypothalamic and spinal sites). Discovery & Research Milestones Discovery & Research Milestones Originated at the University of Arizona in the 1980s, where researchers were exploring sunless tanning agents. Built as a short, stable analog of -MSH, improving its half-life and activity compared to the natural hormone. Early studies tested Melanotan II in skin pigmentation disorders and sexual dysfunction, but it never achieved regulatory approval
Jillian Foglesong Stabile, MD, FAAFP is a board-certified Family Physician
doi:doi:10.1126/science.1243650
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