Novel triazole and morpholine substituted bisnaphthalimide: Synthesis, photophysical and G-quadruplex binding properties
作者:Zhize Ou、Zhiyuan Li、Yunyan Gao、Wenli Xing、Hongdan Jia、Huan Zhang、Na Yi
DOI:10.1016/j.molstruc.2019.02.073
日期:2019.6
Abstract Four bisnaphthalimides derivatives 3a, 3b, 5a and 5b with polyamine linkage have been synthesized and characterized. Different spectroscopic techniques, including UV–Vis spectroscopy, fluorescence spectroscopy, circular dichroism and fluorescence resonance energy transfer (FRET), have been used to explore the interaction of these compounds with G-quadruplex structures (Htelo, c-myc, c-kit)
摘要 合成并表征了四种具有多胺键的双萘二甲酰亚胺衍生物3a、3b、5a和5b。不同的光谱技术,包括紫外-可见光谱、荧光光谱、圆二色性和荧光共振能量转移 (FRET),已被用于探索这些化合物与 G-四链体结构(Htelo、c-myc、c-kit)的相互作用. 化合物 3a、3b 和 5b 对 Htelo、c-myc 和 c-kit G-四链体显示出高亲和力(Ka > 4.42 × 106 M-1),并且对四链体的选择性比 CT DNA 高 40 倍以上。3a、3b 与端粒和致癌 G-四链体的结合诱导荧光强度的强烈增强(18-27 倍),而双链 CT DNA 诱导的荧光增强要弱得多(大约 2 倍)。有荧光,3a、3b 的细胞定位可以通过荧光成像方便地跟踪。结果表明3a、3b可以很容易地被A549肺癌细胞吸收。分子对接研究表明,3a、3b、5a和5b主要结合在G-四链体的凹槽和/或环区,氢键在双