title: Ruthenium(II) polypyridyl complexes as G-quadruplex inducing and stabilizing ligands in telomeric DNA.
abstract: Two ruthenium(ii) polypyridyl complexes [Ru(phen)2(4idip)](ClO4)2 () and [Ru(bpy)2(4idip)](ClO4)2 () (phen = 1,10-phenanthroline, bpy = 2,2'-bipyridine, 4idip = 4-indoleimidazo[4,5-f][1,10]phenanthroline) designed as telomeric G-quadruplex ligands have been synthesized and characterized. The interaction of human telomeric G-quadruplex DNA (HTG21) with the designed ligands was explored by fluorescence analysis, absorption spectroscopy, continuous variation, circular dichroism spectroscopy, fluorescence resonance energy transfer (FRET) melting assay, polymerase chain reaction (PCR) stop assay, telomerase repeat amplification protocol (TRAP), and visual studies. The results showed that both complexes could induce and stabilize different G-quadruplex structures by using a 1 : 1 [quadruplex]/[complex] binding mode ratio. Complex exhibited higher interaction ability and better G-quadruplex selectivity than duplex DNA. Furthermore, both ruthenium complexes led to the inhibition of the enzyme telomerase, and complex was the significantly better inhibitor.
authors: Department of Chemistry, Jinan University, Guangzhou 510632, China.
authors: Qianqian
authors: Q
authors: Yu
authors: Yanyu
authors: Y
authors: Liu
authors: Jingnan
authors: J
authors: Zhang
authors: Fang
authors: F
authors: Yang
authors: Dongdong
authors: D
authors: Sun
authors: Du
authors: D
authors: Liu
authors: Yanhui
authors: Y
authors: Zhou
authors: Jie
authors: J
authors: Liu
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry* / Q000494:pharmacology*; D004247:DNA / Q000737:chemistry* / Q000187:drug effects*; D004355:Drug Stability; D054856:G-Quadruplexes / Q000187:drug effects*; D012428:Ruthenium / Q000737:chemistry*; D013237:Stereoisomerism; D016615:Telomere / Q000235:genetics*
chemical_list: D056831:Coordination Complexes; D012428:Ruthenium; D004247:DNA