Synthesis and biological activity of novel inhibitors of topoisomerase I: 2-Aryl-substituted 2-bis-1H-benzimidazoles
作者:Manish Singh、Vibha Tandon
DOI:10.1016/j.ejmech.2010.11.046
日期:2011.2
topoisomerase I constitute a novel family of antitumor agents. The class of benzimidazole derivatives contains compounds possessing affinity to DNA. For example, fluorescent stains Hoechst 33342 and Hoechst 33258 interact with DNA as ligand and produce nonspecific inhibition of the catalytic activity of many enzymes involved in DNA synthesis, including DNA topoisomerase and DNA helicase. Several 2-aryl-5-substituted-2
拓扑异构酶I的抑制剂构成了新的抗肿瘤剂家族。一类苯并咪唑衍生物包含对DNA具有亲和力的化合物。例如,荧光染料Hoechst 33342和Hoechst 33258作为配体与DNA相互作用,并对包括DNA拓扑异构酶和DNA解旋酶在内的许多参与DNA合成的酶的催化活性产生非特异性抑制。合成了几种2-芳基-5-取代的2,5-双苯并咪唑衍生物,并在体外评价了在拓扑异构酶I存在下这些衍生物诱导DNA裂解的能力。还测定了这些类似物对U87,MCF7和HeLa人肿瘤细胞的细胞毒性。四种化合物对所有细胞系均显示出有效的生长抑制作用,采用ICμM范围内为50。