Small Molecule Antagonist of Leukocyte Function Associated Antigen-1 (LFA-1): Structure−Activity Relationships Leading to the Identification of 6-((5<i>S</i>,9<i>R</i>)-9-(4-Cyanophenyl)-3-(3,5-dichlorophenyl)-1-methyl-2,4-dioxo-1,3,7-triazaspiro[4.4]nonan-7-yl)nicotinic Acid (BMS-688521)
作者:Scott H. Watterson、Zili Xiao、Dharmpal S. Dodd、David R. Tortolani、Wayne Vaccaro、Dominique Potin、Michele Launay、Dawn K. Stetsko、Stacey Skala、Patric M. Davis、Deborah Lee、Xiaoxia Yang、Kim W. McIntyre、Praveen Balimane、Karishma Patel、Zheng Yang、Punit Marathe、Pathanjali Kadiyala、Andrew J. Tebben、Steven Sheriff、ChiehYing Y. Chang、Theresa Ziemba、Huiping Zhang、Bang-Chi Chen、Albert J. DelMonte、Nelly Aranibar、Murray McKinnon、Joel C. Barrish、Suzanne J. Suchard、T. G. Murali Dhar
DOI:10.1021/jm100348u
日期:2010.5.13
Leukocyte function-associated antigen-1 (LFA-1), also known as CD11a/CD18 or alpha(L)beta(2), belongs to the beta(2) integrin subfamily and is constitutively expressed on all leukocytes. The major ligands of LFA-1 include three intercellular adhesion molecules 1, 2, and 3 (ICAM 1, 2, and 3). The interactions between LFA-1 and the ICAMs are critical for cell adhesion, and preclinical animal studies and clinical data from the humanized anti-LFA-1 antibody efalizumab have provided proof-of-concept for LFA-1 as an immunological target. This article will detail the structure activity relationships (SAR) leading to a novel second generation series of highly potent spirocyclic hydantoin antagonists of LFA-1. With significantly enhanced in vitro and ex vivo potency relative to our first clinical compound (1), as well as demonstrated in vivo activity and an acceptable pharmacokinetic and safety profile, 6-((5S,9R)-9-(4-cyanophenyl)-3-(3, 5-dichlorophenyl)-1-methyl-2,4-dioxo-1,3,7-triazaspiro-[4.4]nonan-7-yl)nicotinic acid (2e) was selected to advance into clinical trials.