DNA interstrand cross-link formation by reductive activation of dehydropyrrolizidine progenitors

被引:7
|
作者
Tepe, JJ [1 ]
Kosogof, C [1 ]
Williams, RM [1 ]
机构
[1] Colorado State Univ, Dept Chem, Ft Collins, CO 80523 USA
基金
美国国家卫生研究院;
关键词
DNA interstrand cross-link; reductive activation; dehydropyrrolizidine progenitors;
D O I
10.1016/S0040-4020(02)00311-3
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Pyrrolizidine alkaloids (PAs) are potent hepatotoxins and carcinogens isolated from a wide variety of plants. The hepatotoxicity of these agents is a manifestation of the initial production and release of the reactive dehydropyrrolizidine, which is the DNA-cross-linking species, generated in the liver by the mixed function cytochrome P450 oxidases. A separate class of DNA cross-linkers, including the clinically significant mitomycins and the related FR900482 and congeners are reductively activated in vivo forming a very similar pyrrolic-type intermediate responsible for the DNA cross-linking reactivity of these substances. We report here the synthesis and DNA cross-linking studies of a reductively activated dehydromonocrotaline progentior and its dicarbamate derivative. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:3553 / 3559
页数:7
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