Site-Specific Synthesis and Reactivity of Oligonucleotides Containing Stereochemically Defined 1,<i>N</i><sup>2</sup>-Deoxyguanosine Adducts of the Lipid Peroxidation Product <i>trans</i>-4-Hydroxynonenal
作者:Hao Wang、Ivan D. Kozekov、Thomas M. Harris、Carmelo J. Rizzo
DOI:10.1021/ja0288800
日期:2003.5.1
is a major peroxidation product of omega-6 polyunsaturated fatty acids. The reaction of HNE with DNA gives four diastereomeric 1,N(2)-gamma-hydroxypropano adducts of deoxyguanosine; background levels of these adducts have been detected in animal tissue. Stereospecific syntheses of these four adducts at the nucleoside level have been accomplished. In addition, a versatile strategy for their site-specific
trans-4-Hydroxynonenal (HNE) 是 omega-6 多不饱和脂肪酸的主要过氧化产物。HNE 与 DNA 的反应产生了四种非对映异构体 1,N(2)-γ-羟基丙酸脱氧鸟苷加合物;在动物组织中检测到这些加合物的背景水平。这四种加合物在核苷水平上的立体有择合成已经完成。此外,还开发了一种将它们定点掺入寡核苷酸的通用策略。与未加合物链相比,这些加合物是不稳定的,通过熔融温度测量。加合物 12 聚体的热失稳范围为 5 到 16 摄氏度,取决于加合物的绝对立体化学。还检查了 HNE 加合物在掺入 CpG 序列时形成链间 DNA-DNA 交联的能力。我们发现只有一种 HNE 立体异构体形成链间 DNA-DNA 交联。