1区 · 医学
Article
作者: Wythes, Martin ; Sutton, Scott ; Zhu, JinJiang ; Huang, Buwen ; Bingham, Patrick ; Stewart, Albert E. ; Sach, Neal ; Kania, Robert ; Ren, Shijian ; Kumpf, Robert A. ; Kung, Pei-Pei ; Hu, Wenyue ; Sharma, Shikhar ; Kephart, Susan E. ; Xin, Shuibo ; Rollins, Robert A. ; Fan, Connie ; Liu, Wei ; Maegley, Karen A. ; Zehnder, Luke ; Nguyen, Lisa ; Gukasyan, Hovhannes J. ; Zhu, Huichun ; Khamphavong, Penney ; Gajiwala, Ketan S. ; Edwards, Martin ; Uryu, Sean ; Wang, Hui ; Brooun, Alexei ; Sherrill, John ; Krivacic, Cody ; Deng, Ya-Li ; Wang, Shuiwang ; Yamazaki, Shinji ; Spangler, Jillian ; Collins, Michael ; Grantner, Rita ; Richter, Dan ; Dinh, Dac ; Verhelle, Dominique ; Kraus, Manfred
A new series of lactam-derived EZH2 inhibitors was designed via ligand-based and physicochemical-property-based strategies to address metabolic stability and thermodynamic solubility issues associated with previous lead compound 1. The new inhibitors incorporated an sp3 hybridized carbon atom at the 7-position of the lactam moiety present in lead compound 1 as a replacement for a dimethylisoxazole group. This transformation enabled optimization of the physicochemical properties and potency compared to compound 1. Analysis of relationships between calculated log D (clogD) values and in vitro metabolic stability and permeability parameters identified a clogD range that afforded an increased probability of achieving favorable ADME data in a single molecule. Compound 23a exhibited the best overlap of potency and pharmaceutical properties as well as robust tumor growth inhibition in vivo and was therefore advanced as a development candidate (PF-06821497). A crystal structure of 23a in complex with the three-protein PRC2 complex enabled understanding of the key structural features required for optimal binding.