Rapid and sensitive methods to detect DNA lesions are essential in order to understand their role in carcinogenesis and for potential diagnosis of cancers. The 8‐nitroguanine DNA lesion, which is closely associated with inflammation‐induced cancers, has been characterized for the first time by surface‐enhanced Raman spectroscopy (SERS). This lesion has been studied as the free base, as well as part
快速,灵敏的检测DNA损伤的方法是必不可少的,以便了解其在癌变过程中的作用以及对癌症的潜在诊断。表面增强拉曼光谱法(
SERS)首次表征了与炎症诱发的癌症密切相关的
8-硝基鸟嘌呤DNA损伤。已经研究了该病灶的游离碱,以及在785-488 nm范围内的5种不同激发波长下的二核苷酸和寡脱氧核苷酸(ODN)的一部分。所有硝化的样品产生的光谱与对照
鸟嘌呤的光谱明显不同,硝基带通过DFT计算确定。在较短的激发波长处观察到了额外的共振增强,这些
SERRS测量可以检测到1,300多个碱基中的一种硝化
鸟嘌呤。此外,