Design, synthesis and bioevaluation of PI3Kα-selective inhibitors as potential colorectal cancer drugs
作者:Xue-Mei Zheng、Yuan-Si Chen、Yu-Juan Ban、Yu-Jie Wang、Yong-Xi Dong、Li Lei、Bing Guo、Jian-Ta Wang、Lei Tang、Hong-Liang Li、Ji-Quan Zhang
DOI:10.1016/j.ejmech.2023.115754
日期:2023.11
rapamycin signaling pathway has been implicated in various human cancers, and isoform-selective inhibitors targeting PI3Kα have received significant interest in recent years. In this study, we have designed and synthesized three series of substituted benzoxazole derivatives based on the clinical candidate TAK-117 (8a). A detailed structure-activity relationship (SAR) study has identified the optimal
磷酸肌醇 3 激酶 (PI3K)/雷帕霉素信号通路哺乳动物靶标的失调与多种人类癌症有关,近年来针对 PI3Kα 的异构体选择性抑制剂引起了人们的极大兴趣。在本研究中,我们基于临床候选TAK-117(8a)设计并合成了三个系列的取代苯并恶唑衍生物。详细的构效关系 (SAR) 研究确定了带有喹喔啉支架的最佳化合物18a 。与对照8a相比,18a对 PI3Kα 的抑制活性高出 4.4 倍(IC 50:2.5 vs 11 nM),并且比其他 PI3K 具有更好的异构体选择性。此外,18a对 HCT-116 细胞系的抗增殖作用强于 1.5 倍(IC 50: 3.79 vs 5.80 μM),并且比正常组织细胞具有更好的选择性。还研究了18a的潜在抗肿瘤机制和体外代谢稳定性。值得注意的是,药代动力学测定表明,与8a相比, 18a具有更高的血浆暴露量、更高的最大浓度和更短的消除时间。