Dersimelagon (MT-7117) is an orally active, selective agonist for the melanocortin 1 receptor (MC1R), demonstrating EC50 values of 8.16 nM (h), 3.91 nM (cm), 1.14 nM (m), and 0.251 nM (r) across species such as human, cynomolgus monkey, mouse, and rat, respectively. It exhibits strong affinity for human MC1R and MC4R, with Ki values of 2.26 nM and 32.9 nM, respectively. This compound is applied in the study of skin pigmentation.

α-Melanocyte-stimulating hormone (α-MSH) is a 13-amino acid peptide hormone produced by post-translational processing of proopiomelanocortin (POMC) in the pituitary gland, as well as in keratinocytes, astrocytes, monocytes, and gastrointestinal cells.1It is an agonist of melanocortin receptor 3 (MC3R) and MC4R that induces cAMP production in Hepa cells expressing the human receptors (EC50s = 0.16 and 56 nM, respectively).2α-MSH (100 pM) reducesS. aureuscolony formation andC. albicansgerm tube formationin vitro.3It inhibits endotoxin-, ceramide-, TNF-α-, or okadaic acid-induced activation of NF-κB in U937 cells.1α-MSH reduces IL-6- or TNF-α-induced ear edema in mice.4It also prevents the development of adjuvant-induced arthritis in rats and increases survival in a mouse model of septic shock. Increased plasma levels of α-MSH are positively correlated with delayed disease progression and reduced death in patients with HIV.1 1.Catania, A., Airaghi, L., Colombo, G., et al.α-melanocyte-stimulating hormone in normal human physiology and disease statesTrends Endocrinol. Metab.11(8)304-308(2000) 2.Miwa, H., Gantz, I., Konda, Y., et al.Structural determinants of the melanocortin peptides required for activation of melanocortin-3 and melanocortin-4 receptorsJ. Pharmacol. Exp. Ther.273(1)367-372(1995) 3.Cutuli, M., Cristiani, S., Lipton, J.M., et al.Antimicrobial effects of a-MSH peptidesJ. Leukoc. Biol.67(2)233-239(2000) 4.Lipton, J.M., Ceriani, G., Macaluso, A., et al.Antiiinflammatory effect of the neuropeptide a-MSH in acute, chronic, and systemic inflammationAnn. N.Y. Acad. Sci.25(741)137-148(1994)

Agouti-related Protein (AGRP) (83-132) Amide (human) is a segment derived from the agouti-related protein (AGRP), abundantly present in the hypothalamus' arcuate nucleus. It predominantly functions as an inverse agonist for the melanocortin-4 receptor (MC4R), thereby promoting food intake [1] [2].

PF-00446687 is a selective agonist of melanocortin-4 receptor (MC4R) (EC50 of 12 ± 1 nM).

RO27-3225 TFA is a potent and selective agonist of melanocortin 4 receptor (MC4R; EC50: 1 nM and 8 nM for MC4R and MC1R) with neuroprotective and anti-inflammatory effects. RO27-3225 TFA shows ~30-fold selectivity for MC4R over MC3R.

MC-4R Agonist 1 is an agonist of human melanocortin-4 receptor (MC-4R) and can be used in the research of sexual dysfunction, obesity, and diabetes.

MC-4R Agonist 2 hydrochloride (Example 1) serves as an MC4R agonist, with applications in researching obesity, diabetes, inflammation, and erectile dysfunction. [1]

Melanotan II acetate is an agonist of melanocortin receptor 1 (MC1R), MC3R, MC4R, and MC5R. It has been shown to improve recovery of sciatic nerve function after mechanical injury and increase cisplatin-induced decreases in sensory nerve conduction velocity. Melanotan II acetate increases oxygen consumption and protein levels of uncoupling protein 1 (UCP1) in brown adipose tissue homogenates and decreases food intake, body weight, and serum levels of leptin, glucose, insulin, and cholesterol.

MC-4R Agonist 2 (Example 1), a melanocortin 4 receptor (MC4R) agonist, is employed in the research of conditions such as obesity, diabetes, inflammation, and erectile dysfunction [1].