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Cytotoxicity, cellular uptake, cell cycle arrest, apoptosis, reactive oxygen species and DNA-binding studies of ruthenium(II) complexes
Authors:Yang-Yin Xie  Gan-Jian Lin  Guang-Bin Jiang  Zhen-Hua Liang  Hong-Liang Huang  Yun-Jun Liu
Affiliation:1. School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, People’s Republic of China
2. School of Life Science and Biopharmaceutical, Guangdong Pharmaceutical University, Guangzhou, 510006, People’s Republic of China
Abstract:Three ruthenium(II) polypyridyl complexes [Ru(dmb)2(dadppz)]2+ 1, [Ru(bpy)2(dadppz)]2+ 2 and [Ru(phen)2(dadppz)]2+ 3 were synthesized and characterized by elemental analysis, ES-MS, 1H NMR and 13C NMR. Their DNA-binding behaviors were investigated by absorption titration, fluorescence spectroscopy and viscosity measurements. Cytotoxicity in vitro, apoptosis, cell cycle arrest, cellular uptake and reactive oxygen species assays were performed. The complexes were found to show moderate DNA-binding affinities and high cytotoxicities toward A549, BEL-7402, MG-63 and SKBR-3 cell lines. These complexes can effectively induce apoptosis of BEL-7402. In cell cycle assays, the complexes induced S-phase arrest on BEL-7402 cells and G0/G1-phase arrest on SKBR-3 cells. The DNA-binding experiments showed that the three complexes interact with CT-DNA through an intercalative mode.
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