Probing the Structural Properties of DNA/RNA Grooves with Sterically Restricted Phosphonium Dyes: Screening of Dye Cytotoxicity and Uptake
作者:Ivo Crnolatac、Lidija-Marija Tumir、Nedyalko Y. Lesev、Aleksey A. Vasilev、Todor G. Deligeorgiev、Katarina Mišković、Ljubica Glavaš-Obrovac、Oliver Vugrek、Ivo Piantanida
DOI:10.1002/cmdc.201300085
日期:2013.7
reported rare kinetic differentiation between homo‐polymeric and alternating AT‐DNA sequences by using sterically restricted phosphonium dyes that form dimers within the DNA minor groove, new analogues were prepared in which the quinolone phosphonium moiety was kept constant, while the size and hydrogen bonding properties of the rest of the molecule were varied. Structure–activity relationship studies
为了更详细地研究最近报道的通过使用在DNA小沟内形成二聚体的空间受限phospho染料,在均聚物和交替AT-DNA序列之间罕见的动力学区别,制备了新的类似物,其中喹诺酮phospho部分保持恒定,而其余分子的大小和氢键键合特性则有所不同。结构与活性之间的关系研究表明,附加亚甲基单元的长度略有增加会导致动力学AT选择性丧失,但会产生AT选择性荧光反应。这些与DNA / RNA结合的染料将极低的细胞毒性与有效的细胞摄取以及线粒体的独特荧光标记相结合。与更长的类似物相比,长度的减少(通过亚甲基单元的去除)和正电荷的重排导致染料转换为与GC DNA / dsRNA的插入结合模式,但仍在AT序列的小沟中形成二聚体,因此产生明显不同的手性光学响应。后者染料还显示出对HeLa癌细胞具有高度选择性的抗增殖活性。