Synthesis and Evaluation of Nitroheterocyclic Carbamate Prodrugs for Use with Nitroreductase-Mediated Gene-Directed Enzyme Prodrug Therapy
作者:Michael P. Hay、Robert F. Anderson、Dianne M. Ferry、William R. Wilson、William A. Denny
DOI:10.1021/jm030308b
日期:2003.12.1
carbamate prodrugs of phenylenediamine mustard and 5-amino-1-(chloromethyl)-3-[(5,6,7-trimethoxyindol-2-yl)carbonyl]-1,2-dihydro-3H- benz[e]indoline (amino-seco-CBI-TMI), covering a wide range of reduction potential, were prepared and evaluated for use in gene-directed enzyme prodrug therapy (GDEPT) using a two-electron nitroreductase (NTR) from Escherichia coli B. The carbamate prodrugs and corresponding
苯二胺芥末的1-甲基-2-硝基咪唑-5-氨基甲酸氨基甲酸酯被EMT6-NTR(neo)快速代谢,但未被EMT6细胞代谢,表明它是NTR的有效底物。尽管如此,苯二胺芥末的氨基甲酸酯在IC(50)分析中对NTR + ve细胞显示出相对较低的细胞毒性差异,显然是因为它们保留了足够的烷基化反应性,因此大多数前药在药物暴露期间会与亲核试剂反应。相反,相应的氨基-seco-CBI-TMI前药的NTR底物效率较低,但化学稳定性更高,效力更高,并且在细胞系面板中显示出相当大的NTR-ve / NTR + ve比,比例为15氨基-seco-CBI-TMI的1-甲基-2-硝基-1H-咪唑-5-基甲基和1-甲基-5-硝基-1H-咪唑-2-基甲基氨基甲酸酯的100倍。评估了这两种前药对表达NTR的EMT6肿瘤的活性,其中EMT6肿瘤约占10%。10%NTR + ve细胞。观察到对NTR + ve细胞的杀伤作用很小