Synthesis, modeling and evaluation of 3′-(1-aryl-1H-tetrazol-5-ylamino)-substituted 3′-deoxythymidine derivatives as potent and selective human mitochondrial thymidine kinase inhibitors
作者:Sara Van Poecke、Ana Negri、Jolien Janssens、Nicola Solaroli、Anna Karlsson、Federico Gago、Jan Balzarini、Serge Van Calenbergh
DOI:10.1039/c0ob00591f
日期:——
Based on the presumed binding mode of an earlier identified inhibitor, we herein report new 3â²-modified nucleosides as potent and selective inhibitors of mitochondrial thymidine kinase (TK2). A series of thirteen 3â²-amino-, 3â²-guanidino- and 3â²-tetrazole-containing nucleosides were synthesized and evaluated for their TK2 inhibitory activity. Within the tetrazole series, compounds with nanomolar inhibitory activity were identified. A homology model of TK2 allowed to elucidate the observed activities. Introduction of a 2-bromovinyl group on C-5 of the pyrimidine base of the most promising 3â²-derivative further improved the inhibitory activity, and caused a significant increase in the selectivity for TK2versusTK1. Interestingly, for the current series of analogues, a strong correlation was observed between TK2 and Drosophila melanogasterdNK inhibition, further substantiating the phylogenetic relationship between these two nucleoside kinases.
根据早先发现的一种抑制剂的假定结合模式,我们在此报告了作为线粒体胸苷激酶(TK2)的强效选择性抑制剂的新型 3²-修饰核苷。我们合成了一系列含 3â²-氨基、3â²-胍基和 3â²-四唑的核苷,并对其 TK2 抑制活性进行了评估。在四唑系列中,发现了具有纳摩尔抑制活性的化合物。通过 TK2 的同源模型可以阐明所观察到的活性。在最有前途的 3â²-衍生物的嘧啶基 C-5 上引入 2-溴乙烯基,进一步提高了抑制活性,并显著增加了对 TK2 和 TK1 的选择性。有趣的是,在目前的一系列类似物中,TK2 和黑腹果蝇dNK 的抑制作用之间存在很强的相关性,这进一步证实了这两种核苷激酶之间的系统发育关系。