Novel topoisomerase II (Topo II) inhibitors have gained considerable interest for the development of anticancer agents. In this study, a series of carbazole derivatives containing chalcone analogs (CDCAs) were synthesized and investigated for their Topo II inhibition and cytotoxic activities. The results from Topo II mediated DNA relaxation assay showed that CDCAs could significantly inhibit the activity
新型拓扑异构酶II(Topo II)
抑制剂对抗癌药的开发引起了极大的兴趣。在这项研究中,合成了一系列包含查耳
酮类似物(
CDCAs)的
咔唑衍
生物,并研究了它们对Topo II的抑制作用和细胞毒性活性。Topo II介导的DNA弛豫试验的结果表明,
CDCAs可以显着抑制Topo II的活性,并且结构-活性关系表明苯环中的卤素取代基在该活性中起重要作用。进一步的机理研究表明,
CDCAs充当非嵌入的Topo II催化
抑制剂。此外,一些
CDCAs显示出微摩尔的细胞毒活性。最有效的化合物3h表现出对四种人类癌
细胞系的显着生长抑制作用。流式细胞仪分析表明,化合物3d和3h通过诱导凋亡将HL-60细胞阻滞在sub G1期。膜联蛋白-V-FITC结合测定法进一步证实了这一点。蛋白质印迹分析表明,化合物3h可能通过激活caspase蛋白来诱导细胞凋亡。