Hypoxia-selective antitumor agents. 4. Relationships between structure, physicochemical properties, and hypoxia-selective cytotoxicity for nitracrine analogs with varying side chains: the "iminoacridan hypothesis"
作者:William A. Denny、Graham J. Atwell、Robert F. Anderson、William R. Wilson
DOI:10.1021/jm00167a004
日期:1990.5
potent hypoxia-selective cytotoxin for mammalian cells in culture. In an attempt to modulate the degree of hypoxia selectivity among this class of compounds, we have studied a series of side-chain analogues of nitracrine. Both the electronic and steric properties of the side chain are shown to be important in determining the hypoxia selectivity of the compounds, by controlling the degree of aminoacridine/iminoacridan
硝基ac啶衍生物硝唑林是培养中的哺乳动物细胞的一种有效的低氧选择性细胞毒素。为了调节这类化合物中的低氧选择性程度,我们研究了一系列硝苯胺的侧链类似物。通过控制氨基ac啶/亚氨基ac啶互变异构的程度,侧链的电子和空间性质都对确定化合物的缺氧选择性很重要。对具有修复缺陷的中国仓鼠细胞系UV4的研究表明,所有化合物的细胞毒性均归因于硝基还原和随后形成的大分子加合物。但是,与9-烷基氨基衍生物相比,全部以氨基ac啶互变异构体形式存在的化合物(例如9-氨基衍生物)致死性损害要小得多,在亚氨基ac构象中不同程度地存在。对于整套化合物,缺氧选择性细胞毒性的程度与亚氨基ac啶互变异构体的存在比例密切相关。