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AG-045572 is a nonpeptide antagonist of the gonadotropin-releasing hormone (GnRH) receptor (Kis = 6, 2.2, and 3.8 nM for the human, mouse, and rat receptors, respectively).1 It is selective for the GnRH receptor over a panel of 43 receptors, ion channels, and enzymes at 1 µM. AG-045572 prevents GnRH-induced increases in inositol phosphate production in HEK293 cells expressing the human GnRH receptor (KB = 25 nM). Oral or intravenous administration of AG-045572 decreases plasma luteinizing hormone (LH) levels in castrated rats. It inhibits GnRH-A-induced increases in plasma LH and testosterone levels in non-castrated rats when administered at a dose of 20 mg/kg.
WARNING This product is not for human or veterinary use.
1. Biological characterization of a novel, orally active small molecule gonadotropin-