The Effect of Polyamine Homologation on the Transport and Cytotoxicity Properties of Polyamine−(DNA-Intercalator) Conjugates
作者:Phanstiel、Harry L. Price、Lu Wang、Jane Juusola、Martin Kline、Sapna Majmundar Shah
DOI:10.1021/jo0002792
日期:2000.9.1
DNA topoisomerase-II (TOPO-II) activity at 10 microM. Enzymatic activity was assessed as the ability to unknot (decatenate) and cleave kinetoplast DNA (kDNA). Polyamine conjugation did not disrupt the ability of the acridine-spermidine conjugates 2 and 3 to inhibit TOPO-II activity as compared with the 9-aminoacridine and 9-(N-butyl)aminoacridine controls (at 10 microM). In general, the acridine derivatives
开发了一种有效的五步合成方法来获得亚系列的亚精胺啶和亚精胺蒽共轭物。所述衍生物由在其N4位置通过脂肪族链共价拴系到an啶或蒽核的亚精胺片段(例如亚精胺-[脂族系链] -ac啶)组成。通过使用分别由四个或五个亚甲基单元组成的不同系链,改变了亚精胺和芳香核之间的距离。这些配体(2-5)已显示在10 microM时抑制人DNA拓扑异构酶II(TOPO-II)活性。酶活性被评估为解链(断端)和切割动素体DNA(kDNA)的能力。与9-氨基ac啶和9-(N-丁基)氨基ac啶对照(在10μM下)相比,多胺缀合不破坏the啶-亚精胺缀合物2和3抑制TOPO-II活性的能力。通常,the啶衍生物(2和3)显示出比其蒽对应物(4和5)更高的TOPO-II抑制活性。但是,这种趋势在L1210(鼠白血病)细胞的全细胞试验中被逆转,其中蒽类似物比than啶类似物更有效。在这方面,基于定性酶的测定不能预测相应IC(