作者:Katie J. Alexander、Matthew McConville、Kathryn R. Williams、Konstantin V. Luzyanin、Ian A. O'Neil、Richard Cosstick
DOI:10.1002/chem.201705541
日期:2018.2.26
nucleotides, despite the fact that their biological effects are closely linked to their chemical properties. To this end, a selection of chemical reactions have been performed on 8‐nitroguanine nucleosides and oligodeoxynucleotides. Reactions with alkylating reagents reveal how the 8‐nitro substituent affects the reactivity of the purine ring, by significantly decreasing the reactivity of the N2 position
DNA中的8-硝基鸟嘌呤损伤越来越多地与炎症相关的癌变相关,而鸟苷3',5'-环一磷酸的相同修饰在NO介导的信号转导中产生了第二个信使。尽管关于8-硝基鸟嘌呤核苷酸的生物学效应与其化学性质紧密相关,但对8-硝基鸟嘌呤核苷酸的化学知之甚少。为此,已对8-硝基鸟嘌呤核苷和寡脱氧核苷酸进行了化学反应选择。与烷基化试剂的反应揭示了8-硝基取代基如何通过显着降低N 2位置的反应性以及同时在N处的相对反应性而影响嘌呤环的反应性1似乎被增强。有趣的是,用硫醇置换硝基导致了标记该病灶的有效且特异性的方法,并在寡聚脱氧核苷酸中得到证实。另外,通过使用氢化物源的还原性脱硝作用,该病变的修复也被证明是化学上可行的反应。