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- W4380303912 abstract "Discovery of pan-antagonist ligands for the melanocortin receptors will help identify the physiological activities controlled by these receptors. The previously reported MC3R/MC4R antagonist Ac-DPhe(pI)-Arg-Nal(2′)-Arg-NH2 was identified herein, for the first time, to possess MC1R and MC5R antagonist activity. Further structure–activity relationship studies probing the second and fourth positions were performed toward the goal of identifying potent melanocortin antagonists. Of the 21 tetrapeptides synthesized, 13 possessed MC1R, MC3R, MC4R, and MC5R antagonist activity. Three tetrapeptides were more than 10-fold selective for the mMC1R, including 8 (LTT1-44, Ac-DPhe(pI)-DArg-Nal(2′)-Arg-NH2) that possessed 80 nM mMC1R antagonist potency and was at least 40-fold selective over the mMC3R, mMC4R, and mMC5R. Nine tetrapeptides were selective for the mMC4R, including 14 [SSM1-8, Ac-DPhe(pI)-Arg-Nal(2′)-Orn-NH2] with an mMC4R antagonist potency of 1.6 nM. This compound was administered IT into mice, resulting in a dose-dependent increase in the food intake and demonstrating the in vivo utility of this compound series." @default.
- W4380303912 created "2023-06-13" @default.
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- W4380303912 date "2023-06-12" @default.
- W4380303912 modified "2023-10-18" @default.
- W4380303912 title "Discovery of a Pan-Melanocortin Receptor Antagonist [Ac-DPhe(pI)-Arg-Nal(2′)-Orn-NH<sub>2</sub>] at the MC1R, MC3R, MC4R, and MC5R that Mediates an Increased Feeding Response in Mice and a 40-Fold Selective MC1R Antagonist [Ac-DPhe(pI)-DArg-Nal(2′)-Arg-NH<sub>2</sub>]" @default.
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- W4380303912 doi "https://doi.org/10.1021/acs.jmedchem.3c00432" @default.
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