Synthesis and Anticancer Activity of Simplified Indenoisoquinoline Topoisomerase I Inhibitors Lacking Substituents on the Aromatic Rings
作者:Muthukaman Nagarajan、Andrew Morrell、Brian C. Fort、Marintha Rae Meckley、Smitha Antony、Glenda Kohlhagen、Yves Pommier、Mark Cushman
DOI:10.1021/jm040025z
日期:2004.11.1
where it is involved in a hydrogen bonding interaction with the side chain guanidine group of Arg364. The DNA cleavage patterns observed in the presence of topoisomerase I and various indenoisoquinolines were similar, although significant differences were detected. There were also variations in the DNA cleavage pattern seen with camptothecin vs the indenoisoquinolines, which indicates that these two
茚并异喹啉类是一类细胞毒性拓扑异构酶I抑制剂,与喜树碱相比具有某些优势,包括化合物本身的稳定性更高,以及药物-酶-DNA裂解复合物的稳定性更高。为了研究存在于先前合成的茚并异喹啉拓扑异构酶I抑制剂的芳香环上的二(甲氧基)和亚甲基二氧基取代基的可能的生物学作用,合成了一系列缺少这些取代基的化合物,并测试了其在癌细胞培养中的细胞毒性和酶的毒性。抑制活性。结果表明,芳族取代基对生物活性的贡献很小,但可观察到。关于三元复合物中未取代的茚并异喹啉与DNA和拓扑异构酶I结合的分子模型表明,内酰胺氮上的取代基突出于主沟,羰基被引出其参与的次沟。与Arg364的侧链胍基的氢键相互作用。尽管存在显着差异,但在拓扑异构酶I和各种茚并异喹啉存在下观察到的DNA切割模式相似。喜树碱与茚并异喹啉之间的DNA裂解模式也存在差异,这表明这两种拓扑异构酶I抑制剂可能以不同的方式靶向癌细胞基因组,从而产生了不同的抗癌活性谱。