Hypoxia-Selective DNA Interstrand Cross-Link Formation by Two Modified Nucleosides
作者:Yunyan Kuang、Huabing Sun、J. Craig Blain、Xiaohua Peng
DOI:10.1002/chem.201201960
日期:2012.10.1
The clean crossed code: Two nitroimidazole‐modified thymidines 1 a and 1 b were synthesized and incorporated into DNA oligomers. The 350 nm photolysis of 1 a and 1 b generated a 5‐(2′‐deoxyuridinyl)methyl radical that induced DNA interstrand cross‐links (ICL; see scheme). A higher ICL yield was observed under hypoxic conditions than under aerobic conditions.
干净的交叉代码:合成了两个硝基咪唑修饰的胸苷1a和1b,并将其整合到 DNA 寡聚体中。1a和1b的 350 nm 光解产生 5-(2'-脱氧尿苷基)甲基自由基,诱导 DNA 链间交联(ICL;见方案)。在缺氧条件下观察到比在有氧条件下更高的 ICL 产量。