Structure-Guided Design and Initial Studies of a Bifunctional MEK/PI3K Inhibitor (ST-168)
作者:Marcian E. Van Dort、Stefanie Galbán、Charles A. Nino、Hao Hong、April A. Apfelbaum、Gary D. Luker、Greg M. Thurber、Lydia Atangcho、Cagri G. Besirli、Brian D. Ross
DOI:10.1021/acsmedchemlett.7b00111
日期:2017.8.10
displays improved MEK1 and PI3K isoform inhibition, is described. ST-168 demonstrated a 2.2-fold improvement in MEK1 inhibition and a 2.8-, 2.7-, 23-, and 2.5-fold improved inhibition toward the PI3Kα, PI3Kβ, PI3Kδ, and PI3Kγ isoforms, respectively, as compared to a previous lead compound (4; ST-162) in in vitro enzymatic inhibition assays. ST-168 demonstrated superior tumoricidal efficacy over ST-162
描述了一种新的单一实体MEK / PI3K双功能抑制剂(7,ST-168)的基于结构的设计,该抑制剂显示出改善的MEK1和PI3K同工型抑制作用。与以前的先导化合物相比,ST-168分别显示出对PI3Kα,PI3Kβ,PI3Kδ和PI3Kγ同工型的MEK1抑制作用提高了2.2倍,对PI3Kα,PI3Kβ,PI3Kδ和PI3Kγ的抑制作用分别提高了2.8、2.7、23和2.5倍。 (4;ST-162)在体外酶抑制试验中。在A375黑色素瘤球状肿瘤模型中,ST-168表现出优于ST-162的杀癌效果。ST-168比ST-162更有效在A375黑色素瘤小鼠模型中进行的肿瘤治疗研究中口服给药时,具有促进肿瘤控制的作用,证实了其对体内MEK1 / PI3K联合抑制的生物利用度和功效。