DNA interstrand cross-link formation initiated by reaction between singlet oxygen and a modified nucleotide

被引：85

作者：

Hong, IS ^{[1
]}

Greenberg, MM ^{[1
]}

机构：

[1] Johns Hopkins Univ, Dept Chem, Baltimore, MD 21218 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2005年 / 127卷 / 30期

关键词：

D O I：

10.1021/ja053493m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

DNA is the target of many anti-cancer therapies. These agents damage the biopolymer by oxidation or by alkylation. Interstrand DNA cross-links are believed to be the source of cytotoxicity of anti-tumor agents, such as mitomycin C, which alkylate the biopolymer. In contrast, deoxyguanosine oxidation is the result of reaction between DNA and singlet oxygen, which is the damaging species produced in photodynamic therapy. We have shown that, upon oxidation by singlet oxygen, an analogue of thymidine (2) rearranges to a methide, which forms DNA-DNA interstrand cross-links. This novel process suggests that 2 may be a useful adjuvant in photodynamic therapy. Copyright © 2005 American Chemical Society.

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页码：10510 / 10511

页数：2

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