Topoisomerase I-Mediated Antiproliferative Activity of 10-Substituted and 12-Substituted Homocamptothecins
作者:Wei Guo、Wenfeng Liu、Lingjian Zhu、Yongqiang Zhang、Pengfei Cheng、Guoqiang Dong、Chunlin Zhuang、Jianzhong Yao、Chunquan Sheng、Zhenyuan Miao、Wannian Zhang
DOI:10.1002/cbdv.201000307
日期:2011.8
Homocamptothecin (hCPT) is an E‐ring modified camptothecin (CPT) analogue, which showed pronounced inhibitory activity of topoisomerase I. In search of novel hCPT‐type anticancer agents, two series of hCPT derivatives were synthesized and evaluated in vitro against three human tumor cell lines. The results indicated that the 10‐substituted hCPT derivatives had a considerably higher cytotoxic activity
Homocamptothecin (hCPT) 是一种 E 环修饰的喜树碱 (CPT) 类似物,对拓扑异构酶 I 显示出显着的抑制活性。 为了寻找新的 hCPT 型抗癌剂,合成了两个系列的 hCPT 衍生物并在体外对三种人类肿瘤进行了评估细胞系。结果表明,10-取代的hCPT衍生物比12-取代的具有更高的细胞毒活性。在 10 个取代的化合物中,8a、8b、9b 和 9i 对肺癌细胞系 A-549 显示出与阳性对照药物拓扑替康相当甚至更强的活性。此外,hCPT 类似物 8a 和 8b 在 100 μM 的浓度下表现出比 CPT 更高的拓扑异构酶 I 抑制活性。