Novel 7-Oxyiminomethyl Derivatives of Camptothecin with Potent in Vitro and in Vivo Antitumor Activity
作者:Sabrina Dallavalle、Anna Ferrari、Barbara Biasotti、Lucio Merlini、Sergio Penco、Grazia Gallo、Mauro Marzi、Maria Ornella Tinti、Roberta Martinelli、Claudio Pisano、Paolo Carminati、Nives Carenini、Giovanni Beretta、Paola Perego、Michelandrea De Cesare、Graziella Pratesi、Franco Zunino
DOI:10.1021/jm0108092
日期:2001.9.1
In an attempt to synthesize potential anticancer agents acting by inhibition of topoisomerase I (Topo I) a new series of oxyiminomethyl derivatives in position 7 of camptothecin (CPT) was prepared. The synthesis relied on the condensation of 20S-CPT-7-aldehyde or 20S-CPT-7-ketones with alkyl, aryl, heteroaryl, arylalkyl, and heteroarylalkyl O-substituted hydroxylamines. The compounds were tested for
为了合成可能通过抑制拓扑异构酶I(Topo I)起作用的潜在抗癌药,制备了喜树碱(CPT)7位上的一系列新的氧亚氨基甲基衍生物。合成依赖于20S-CPT-7-醛或20S-CPT-7-酮与烷基,芳基,杂芳基,芳基烷基和杂芳基烷基O取代的羟胺的缩合。测试了这些化合物在体外对H460非小肺癌细胞系的细胞毒性活性,该活性针对0.01-0.3 microM范围内的37种化合物中的24种。QSAR分析表明,亲脂性是与细胞毒性相关的主要参数。对DNA-Topo I-药物可裂解复合物的研究表明,细胞毒性与Topo I抑制之间存在大致平行的关系。NaCl介导的三元复合物破坏后DNA裂解的持续性表明,对于最有效的化合物(例如15),细胞毒性至少部分与复合物的稳定有关,这也得到了DNA-的持续性的支持。药物处理细胞中的酶复合物。使用人肺肿瘤异种移植模型,与托泊替康直接比较,评估了最有效类似物(15)的体内抗肿瘤功效。在最佳剂量(2-3