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• W2607566233 endingPage "4357" @default.
• W2607566233 startingPage "4342" @default.
• W2607566233 abstract "The centrally expressed melanocortin-3 and -4 receptors (MC3R/MC4R) have been studied as possible targets for weight management therapies, with a preponderance of studies focusing on the MC4R. Herein, a novel tetrapeptide scaffold [Ac-Xaa1-Arg-(pI)DPhe-Xaa4-NH2] is reported. The scaffold was derived from results obtained from a MC3R mixture-based positional scanning campaign. From these results, a set of 48 tetrapeptides were designed and pharmacologically characterized at the mouse melanocortin-1, -3, -4, and -5 receptors. This resulted in the serendipitous discovery of nine compounds that were MC3R agonists (EC50 < 1000 nM) and MC4R antagonists (5.7 < pA2 < 7.8). The three most potent MC3R agonists, 18 [Ac-Arg-Arg-(pI)DPhe-Tic-NH2], 1 [Ac-His-Arg-(pI)DPhe-Tic-NH2], and 41 [Ac-Arg-Arg-(pI)DPhe-DNal(2′)-NH2] were more potent (EC50 < 73 nM) than the melanocortin tetrapeptide Ac-His-DPhe-Arg-Trp-NH2. This template contains a sequentially reversed “Arg-(pI)DPhe” motif with respect to the classical “Phe-Arg” melanocortin signaling motif, which results in pharmacology that is first-in-class for the central melanocortin receptors." @default.
• W2607566233 created "2017-05-05" @default.
• W2607566233 creator A5005431998 @default.
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• W2607566233 creator A5091678168 @default.
• W2607566233 date "2017-05-15" @default.
• W2607566233 modified "2023-10-18" @default.
• W2607566233 title "Discovery of Mixed Pharmacology Melanocortin-3 Agonists and Melanocortin-4 Receptor Tetrapeptide Antagonist Compounds (TACOs) Based on the Sequence Ac-Xaa¹-Arg-(pI)DPhe-Xaa⁴-NH₂" @default.
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