Discovery of Potent and Selective Quinoxaline-Based Protease-Activated Receptor 4 (PAR4) Antagonists for the Prevention of Arterial Thrombosis
作者:Xiaojun Zhang、Wen Jiang、Jeremy M. Richter、J. Alex Bates、Samuel K. Reznik、Sylwia Stachura、Richard Rampulla、Dyamanna Doddalingappa、Sankar Ulaganathan、Ji Hua、Jeffrey S. Bostwick、Chi Sum、Shana Posy、Sarah Malmstrom、Joyce Dickey、David Harden、R. Michael Lawrence、Victor R. Guarino、William A. Schumacher、Pancras Wong、Jing Yang、David A. Gordon、Ruth R. Wexler、E. Scott Priestley
DOI:10.1021/acs.jmedchem.3c01986
日期:2024.3.14
led to the discovery of a quinoxaline-benzothiazole series as potent and selective PAR4 antagonists. The lead compound 48, possessing a 2 nM IC50 against PAR4 activation by γ-thrombin in platelet-rich plasma (PRP) and greater than 2500-fold selectivity versus PAR1, demonstrated robust antithrombotic efficacy and minimal bleeding in the cynomolgus monkey models.
PAR4 是一种有前景的抗血栓靶点,相对于当前的抗血小板治疗,具有将疗效与出血风险分开的潜力。为了发现一种新型 PAR4 拮抗剂化学型,我们鉴定出了一种基于喹喔啉的 HTS hit 3 ,具有低 μM 效力。通过使用位置 SAR 扫描和构象约束核心的设计来优化 HTS 命中,导致发现了喹喔啉-苯并噻唑系列作为有效的选择性 PAR4 拮抗剂。先导化合物48在富含血小板的血浆 (PRP) 中对 γ-凝血酶激活 PAR4 具有 2 nM IC 50 ,且选择性相对于 PAR1 超过 2500 倍,在食蟹猴模型中表现出强大的抗血栓功效和最少的出血。