[D-Trp8]-γ-MSH is a selective melanocortin 3 (MC3) receptor agonist (IC50 values are 6.7, 340 and 600 nM for human MC3, MC5 and MC4 receptors respectively). [D-Trp8]-γ-MSH displays anti-inflammatory efficacy.
SHU 9119 is an effective human melanocortin 3 and 4 receptors (MC3 4R) antagonist and a partial MC5R agonist (IC50: 0.23, 0.06, and 0.09 nM for human MC3R, MC4R and MC5R, respectively).