Coralyne and related compounds as mammalian topoisomerase I and topoisomerase II poisons
作者:Darshan Makhey、Barbara Gatto、Chiang Yu、Angela Liu、Leroy F. Liu、Edmond J. LaVoie
DOI:10.1016/0968-0896(96)00054-5
日期:1996.6
inium chloride was the most potent topoisomerase I poison among the coralyne analogues evaluated, having similar activity to camptothecin. This analogue also possessed exceptional potency as a topoisomerase II poison. Despite the pronounced activity of several of these coralyne derivatives as topoisomerase I poisons, none of these compounds had cytotoxic activity similar to camptothecin. Possible differences
DNA拓扑异构酶是负责修饰DNA拓扑状态的核酶。已经证明能够中毒拓扑异构酶的药物的开发是寻找新型癌症化学疗法的一种有吸引力的方法。Coralyne是一种抗白血病的生物碱,与有效的拓扑异构酶I和II毒物亚硝胺具有明显的结构相似性。合成了珊瑚状类似物,并评估了它们作为拓扑异构酶I和拓扑异构酶II毒物的活性。还评估了这些类似物在人淋巴母细胞系RPMI 8402及其耐喜树碱的变体CPT-K5中的细胞毒性。这些类似物的药理活性强烈依赖于取代模式和取代基的性质。还合成了几种1-苄基异喹啉和3-苯基异喹啉。这些仅掺入珊瑚环部分结构的化合物被评估为拓扑异构酶毒物并具有细胞毒性。这些结构活性研究表明,与珊瑚环系统相关的结构刚性可能对药理活性至关重要。这些珊瑚炔类似物上3,4-亚甲基二氧基取代基的存在通常与拓扑异构酶毒物的活性增强有关。5,6-二氢-3,4-亚甲基二氧基-10,11-二甲氧基二苯并[a,g]喹