Topoisomerase I-mediated DNA cleavage as a guide to the development of antitumor agents derived from the marine alkaloid lamellarin D: triester derivatives incorporating amino acid residues
作者:Christelle Tardy、Michaël Facompré、William Laine、Brigitte Baldeyrou、Dolores Garcı́a-Gravalos、Andrés Francesch、Cristina Mateo、Alfredo Pastor、José A Jiménez、Ignacio Manzanares、Carmen Cuevas、Christian Bailly
DOI:10.1016/j.bmc.2004.01.020
日期:2004.4
pentacyclic planar chromophore typical of the parent alkaloid were tested as topoisomerase I inhibitors. The non-amino compounds in group A showed no activity against topoisomerase I and were essentially non cytotoxic. In sharp contrast, compounds in group B incorporating amino acid residues strongly promoted DNA cleavage by human topoisomerase I. LAM-D derivatives tri-substituted with leucine, valine, proline
近来海洋生物碱lamellarin D(LAM-D)被定性为人类拓扑异构酶I的强力毒物,赋予其对肿瘤细胞的显着细胞毒活性。我们在这里报告LAM-D系列中的第一个结构-活性关系研究。两组三酯化合物,它们在6H- [1]苯并吡喃并[4',3':4,5]吡咯并[2,1-a]异喹啉-6-测试了一种典型的母体生物碱的五环平面生色团作为拓扑异构酶I抑制剂。A组中的非氨基化合物对拓扑异构酶I没有活性,并且基本上无细胞毒性。与之形成鲜明对比的是,B组中掺有氨基酸残基的化合物强烈促进了人类拓扑异构酶I对DNA的切割。亮氨酸三取代的LAM-D衍生物,缬氨酸,脯氨酸,苯丙氨酸或丙氨酸残基或相关的氨基侧链可稳定拓扑异构酶I-DNA复合物。用这些分子在T向下箭头G或C向下箭头G二核苷酸处检测到的DNA切割位点与LAM-D相同,但与喜树碱仅在T向下箭头G刺激拓扑异构酶I介导的切割的DNA切割位点略有不同。在DNA弛豫