Identification of MK-944a: A Second Clinical Candidate from the Hydroxylaminepentanamide Isostere Series of HIV Protease Inhibitors
作者:Bruce D. Dorsey、Colleen McDonough、Stacey L. McDaniel、Rhonda B. Levin、Christina L. Newton、Jacob M. Hoffman、Paul L. Darke、Joan A. Zugay-Murphy、Emilio A. Emini、William A. Schleif、David B. Olsen、Mark W. Stahlhut、Carrie A. Rutkowski、Lawrence C. Kuo、Jiunn H. Lin、I-W. Chen、Stuart R. Michelson、M. Katharine Holloway、Joel R. Huff、Joseph P. Vacca
DOI:10.1021/jm9903848
日期:2000.9.1
Recent results from human clinical trials have established the critical role of HIV protease inhibitors in the treatment of acquired immune-deficiency syndrome (AIDS). However, the emergence of viral resistance, demanding treatment protocols, and adverse side effects have exposed the urgent need for a second generation of HIV protease inhibitors. The continued exploration of our hydroxylaminepentanamide (HAPA) transition-state isostere series of HIV protease inhibitors, which initially resulted in the identification of Crixivan (indinavir sulfate, MK-639, L-735,524), has now yielded MK-944a (L-756,423). This compound is potent, is selective, and competitively inhibits HIV-1 PR with a Ki value of 0.049 nM. It stops the spread of the HIVIIIb-infected MT4 lymphoid cells at 25.0-50.0 nM, even in the presence of alpha(1) acid glycoprotein, human serum albumin, normal human serum, or fetal bovine serum. MK-944a has a longer half-life in several animal models (rats, dogs, and monkeys) than indinavir sulfate and is currently in advanced human clinical trials.