Synthesis, biological evaluation and structure-activity relationship of a novel class of PI3Kα H1047R mutant inhibitors
作者:Ning Zhang、Zhimei Yu、Xiaohong Yang、Yan Zhou、Jia Wang、Shao-Lin Zhang、Ming-Wei Wang、Yun He
DOI:10.1016/j.ejmech.2018.09.002
日期:2018.10
treatment. As our continuing endeavor to discover isoform and/or mutant selective class of PI3K inhibitors, herein we report the optimization of a structurally novel PI3Kα H1047R mutant inhibitor Hit-02 (EC50 = 115.3 μM), which was identified from a high-throughput screening campaign. Structure-activity relationship analysis enabled us to discover compound 7h, which strongly inhibited PI3Kα H1047R
磷脂酰肌醇3-激酶α(PI3Kα)是最有吸引力的癌症治疗靶标之一。作为我们不断努力发现PI3K抑制剂的同工型和/或突变体选择性类别的方法,我们在此报告了对结构新颖的PI3KαH1047R突变体抑制剂Hit-02(EC 50 = 115.3μM)的优化,该结构已通过高通量筛选确定活动。结构-活性关系分析使我们能够发现化合物7h,该化合物强烈抑制PI3KαH1047R突变体,其EC 50值为0.55μM ,效力比Hit-02高200倍以上,而对其他PI3K亚型的影响很小。Western blotting检测表明7h降低AKT的磷酸化水平,这是7h抑制PI3KαH1047R突变体功能的另一个证据。细胞活力测定显示7h抑制HCT-116癌细胞的生长,IC 50值为10.9μM。另外,发现7h使细胞周期停滞在G2期,但未显示任何细胞凋亡作用。此外,7h明显诱导细胞自噬,可能有助于其在癌细胞中的抗增