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  • Title: 2,4-diaminopyrimidine derivatives as potent growth hormone secretagogue receptor antagonists.
    Author: Serby MD, Zhao H, Szczepankiewicz BG, Kosogof C, Xin Z, Liu B, Liu M, Nelson LT, Kaszubska W, Falls HD, Schaefer V, Bush EN, Shapiro R, Droz BA, Knourek-Segel VE, Fey TA, Brune ME, Beno DW, Turner TM, Collins CA, Jacobson PB, Sham HL, Liu G.
    Journal: J Med Chem; 2006 Apr 20; 49(8):2568-78. PubMed ID: 16610800.
    Abstract:
    Ghrelin, a gut-derived orexigenic hormone, is an endogenous ligand of the growth hormone secretagogue receptor (GHS-R). Centrally administered ghrelin has been shown to cause hunger and increase food intake in rodents. Inhibition of ghrelin actions with ghrelin antibody, peptidyl GHS-R antagonists, and antisense oligonucleosides resulted in weight loss and food intake decrease in rodents. Here we report the effects of GHS-R antagonists, some of which were potent, selective, and orally bioavailable. A structure-activity relationship study led to the discovery of 8a, which was effective in decreasing food intake and body weight in several acute rat studies.
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