Phenazine N,N′-dioxide scaffold as selective hypoxic cytotoxin pharmacophore. Structural modifications looking for further DNA topoisomerase II-inhibition activity
作者:Mariana Gonda、Marcos Nieves、Elia Nunes、Adela López de Ceráin、Antonio Monge、María Laura Lavaggi、Mercedes González、Hugo Cerecetto
DOI:10.1039/c3md00022b
日期:——
Phenazine-5,10-dioxides have been identified as prodrugs for antitumour therapy that undergo hypoxic-selective bioreduction, in the solid tumour cells, to form cytotoxic species. We investigated structural modifications of the phenazine-5,10-dioxide scaffold attempting to find new selective hypoxic cytotoxins with additional ability to inhibit DNA topoisomerase II. Four series of new phenazine-5,10-dioxides aryl-substituted connected by different linkers were prepared. The clonogenic survivals of V79 cells on aerobic and anaerobic conditions were determined, and studies of oxic DNA-interaction and hypoxic DNA topoisomerase II-inhibition, for the most relevant derivatives, were performed. Four new hypoxic-selective cytotoxins were identified at the assayed doses. In some of them were operative the DNA-interaction and/or the inhibition of DNA topoisomerase II. For one of the unselective cytotoxin biotransformation studies were performed on aerobic and anaerobic conditions, explaining the lack of selectivity.
吩嗪-5,10-二氧化物已被确定为抗肿瘤治疗的前药,在实体肿瘤细胞中,它们会经历缺氧选择性生物还原,形成细胞毒性物质。我们研究了吩嗪-5,10-二氧代骨架的结构修饰,试图找到新的选择性缺氧细胞毒素,并具有抑制DNA拓扑异构酶II的额外能力。我们制备了四个系列的新吩嗪-5,10-二氧化物,它们由不同的连接剂连接的芳基取代。