Synthesis, DNA-binding and topoisomerase inhibitory activity of ruthenium(II) polypyridyl complexes
作者:Ke-Jie Du、Jin-Quan Wang、Jun-Feng Kou、Guan-Ying Li、Li-Li Wang、Hui Chao、Liang-Nian Ji
DOI:10.1016/j.ejmech.2011.01.019
日期:2011.4
Two ruthenium(II) complexes [Ru(bpy)(2)(bfipH)](2+) (I) and [Ru(phen)(2)(bfipH)](2+) (2) have been synthesized and characterized. The DNA-binding behaviors of complexes were studied by using spectroscopic and viscosity measurements. Results suggested that the two complexes bind to DNA in an intercalative mode. Complexes 1 and 2 can efficiently photocleave pBR322 DNA in vitro under irradiation, singlet oxygen (O-1(2)) was proved to contribute to the DNA photocleavage process. Topoisomerase inhibition and DNA strand passage assay confirmed that two Ru(11) complexes acted as efficient dual inhibitors of topoisomerases I and II. In MTT cytotoxicity studies, two Ru(II) complexes exhibited antitumor activity against BEL-7402, HeLa, MCF-7 tumor cells. The AO/EB staining assay indicated that Ru(II) complexes could induce the apoptosis of HeLa cells. (C) 2011 Elsevier Masson SAS. All rights reserved.