A Potent, Nonpeptidyl 1<i>H</i>-Quinolone Antagonist for the Gonadotropin-Releasing Hormone Receptor
作者:Robert J. DeVita、Thomas F. Walsh、Jonathan R. Young、Jinlong Jiang、Feroze Ujjainwalla、Richard B. Toupence、Mamta Parikh、Song X. Huang、Jason A. Fair、Mark T. Goulet、Matthew J. Wyvratt、Jane-L. Lo、Ning Ren、Joel B. Yudkovitz、Yi T. Yang、Kang Cheng、Jisong Cui、George Mount、Susan P. Rohrer、James M. Schaeffer、Linda Rhodes、Jennifer E. Drisko、Erin McGowan、D. Euan MacIntyre、Styliani Vincent、Josephine R. Carlin、Judith Cameron、Roy G. Smith
DOI:10.1021/jm000275p
日期:2001.3.1
Extensive development of the structure-activity relationships of a screening lead determined three important pharmacophores for gonadotropin-releasing hormone (GnRH) receptor antagonist activity. Incorporation of the 3,4,5-trimethylphenyl group at the 3-position, 2-(2(S)-azetidinyl)ethoxy group at the 4-position, and N-4-pyrimidinylcarboxamide at the g-position of the quinolone core resulted in the identification of 4-(2-(azetidin-2(S)-yl)ethoxy)-7-chloro-2-oxo-3-(3,4,5-trimethylphenyl)-1,2-dihydroquinoline-6-carboxylic acid pyrimidin-4-ylamide (1) as a potent antagonist of the GnRH receptor. A 104-fold increase in in vitro binding affinity is observed for the GnRH receptor as compared to the initial screening lead. Compound 1 exhibits nanomolar binding activity and functional antagonism at the human receptor and is 7-fold less active at the rhesus receptor. Intravenous administration of compound 1 to rhesus monkeys results in a significant decrease of the serum levels of downstream hormones, luteinizing hormone (79% decrease in area under the curve) and testosterone (92% decrease in area under the curve), at a dose of 3 mg/kg. Quinolone 1 is a potent nonpeptidyl antagonist for the human GnRH receptor that is efficacious for the suppression of luteinizing hormone and testosterone in primates.