The effect of a bromide leaving group on the properties of nitro analogs of the duocarmycins as hypoxia-activated prodrugs and phosphate pre-prodrugs for antitumor therapy
作者:Ralph J. Stevenson、William A. Denny、Amir Ashoorzadeh、Frederik B. Pruijn、Wouter F. van Leeuwen、Moana Tercel
DOI:10.1016/j.bmc.2011.08.045
日期:2011.10
(nitroCBIs) of the antitumor antibiotic duocarmycins are a new class of hypoxia activated prodrugs. These compounds undergo hypoxia-selective metabolism to form potent DNA alkylating agents. A series of four nitroCBI alcohol prodrugs containing a bromide rather than chloride or sulfonate leaving group was synthesized. In assays for in vitro hypoxia-selective cytotoxicity against human tumor cell lines
硝基塞科抗肿瘤抗生素Duocarcincins的类似物(nitroCBIs)是一类新型的缺氧激活前药。这些化合物进行缺氧选择性代谢,形成有效的DNA烷基化剂。合成了一系列四个含有溴化物而不是氯化物或磺酸盐离去基团的硝基CBI醇前药。在针对人类肿瘤细胞系的体外低氧选择性细胞毒性测定中,两种带有DNA小沟结合基本侧链的溴化物在HT29细胞中的缺氧细胞毒性比(HCR)为52-286,在SiHa细胞中的41-43。这些值与先前报道的相关氯化物类似物比较好。合成了溴化物的相应的更具水溶性的磷酸盐前药,并评估了其对SiHa人肿瘤异种移植物的体内抗肿瘤活性。所有四种磷酸盐,在无毒剂量下可杀死10个细胞,其杀灭率为0.87–2.80,与氯离子类似物的杀伤力相当或更高。