Symmetry-based ligand design and evaluation of small molecule inhibitors of programmed cell death-1/programmed death-ligand 1 interaction
作者:Seiji Kawashita、Koichi Aoyagi、Hiroshi Yamanaka、Rie Hantani、Shiori Naruoka、Atsuo Tanimoto、Yuji Hori、Yukiyo Toyonaga、Kyoko Fukushima、Susumu Miyazaki、Yoshiji Hantani
DOI:10.1016/j.bmcl.2019.07.027
日期:2019.9
The development of small molecule inhibitors of PD-1/PD-L1 is eagerly anticipated for treatment of cancer. We focused on the symmetry of the ternary complex structure of reported small molecule ligands and hPD-L1 homodimers, and designed partially- or fully-symmetric compounds for more potent inhibitors. The design of the new compounds was guided by our hypothesis that the designed symmetric compound
迫切期望开发PD-1 / PD-L1小分子抑制剂以治疗癌症。我们专注于已报道的小分子配体和hPD-L1同型二聚体的三元复杂结构的对称性,并为更有效的抑制剂设计了部分或完全对称的化合物。新化合物的设计受我们的假设指导,即所设计的对称化合物将诱导A Tyr56蛋白残基侧链翻转形成新的空腔。设计的化合物4在生理条件下显示出与hPD-L1的结合亲和力以及PD-1 / PD-L1的抑制活性显着提高。化合物4在混合淋巴细胞反应试验中,IFN-γ分泌水平也呈剂量依赖性增加。这些结果不仅表明用小分子靶向PD-1 / PD-L1途径的可行性,而且说明了基于对称的配体设计作为靶向蛋白质-蛋白质相互作用稳定剂的有吸引力的方法的适用性。