Melanotan-2: Research Overview

Melanotan-2 (MT-2) is a synthetic cyclic heptapeptide analogue of alpha-melanocyte stimulating hormone (α-MSH). It was originally developed at the University of Arizona as part of a research program exploring melanocortin receptor agonists for photoprotection — the hypothesis being that stimulating melanogenesis could reduce UV-associated skin damage. Since its development, MT-2 has been studied in a wide range of preclinical models, including research on pigmentation, sexual function, energy homeostasis, and cardiovascular biology.

Mechanism of Action

Melanotan-2 is a non-selective melanocortin receptor agonist with affinity for MC1R, MC3R, MC4R, and MC5R. MC1R activation in melanocytes stimulates melanin synthesis through the cAMP-PKA signaling cascade, promoting increased pigmentation in skin and hair follicle cells. MC4R activation in the hypothalamus is associated with reduced food intake and modulation of energy balance. MC4R signaling in the central nervous system has also been linked to sexual arousal pathways in animal models. The compound’s cyclic structure confers resistance to enzymatic degradation, giving it a longer duration of action than endogenous α-MSH.

Key Research Areas

• Melanogenesis Research: MT-2 is a standard tool compound in pigmentation biology, used in cell culture and animal models to study melanin synthesis, melanocyte biology, and photoprotection mechanisms.
• Energy Balance and Appetite Models: Research has examined MT-2’s MC4R-mediated effects on food intake and body weight in rodent models of obesity and metabolic dysfunction.
• Sexual Function Research: Animal studies have documented MT-2’s effects on sexual behavior through central melanocortin signaling, making it a reference compound in reproductive neuroendocrinology research.
• Cardiovascular Models: Some research has explored melanocortin receptor agonism in cardiovascular contexts, including blood pressure regulation and heart rate variability in animal models.

Research Applications

MT-2 is used as a research tool compound in melanocortin receptor pharmacology, pigmentation biology, and neuroendocrinology. In in vitro settings, it is applied to melanocyte cell lines to study cAMP signaling, MITF (microphthalmia transcription factor) activation, and melanin production. In animal models, it is administered subcutaneously and studied for dose-response effects on pigmentation, body weight, and behavioral endpoints. MT-2 is also used as a reference agonist when characterizing novel melanocortin receptor ligands.

Storage and Handling

Melanotan-2 is supplied as a lyophilized powder for research use. Store at -20°C in a dry, light-protected environment. Reconstitute with sterile bacteriostatic water using aseptic technique. Once reconstituted, store at 2–8°C and use within 28 days. Avoid repeated freeze-thaw cycles.

Available from Alpha Peptides US

Alpha Peptides US offers Melanotan-2 10mg for qualified research applications. Suitable for melanocortin receptor research, pigmentation studies, and neuroendocrinology models.

This product is intended for laboratory research purposes only. It is not approved by the FDA and is not intended for human or veterinary use, diagnosis, treatment, or prevention of any condition.