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Synthesis, characterization, and antitumor properties of ruthenium(II) anthraquinone complexes

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Three new Ru(II) complexes, [Ru(dmb)2(ipad)](ClO4)2 (dmb = 4,4′-dimethyl-2,2′-bipyridine, ipad = 2-(anthracene-9,10-dione-2-yl) imidazo[4,5-f][1,10]phenanthroline, 1), [Ru(dmp)2(ipad)](ClO4)2 (dmp = 2,9-dimethyl-1,10-phenanthroline, 2), and [Ru(dip)2(ipad)](ClO4)2 (dip = 4,7-diphenyl-1,10-phenanthroline, 3), have been synthesized and characterized. The three Ru(II) complexes intercalate with the base pairs of DNA. The in vitro antiproliferative activities and apoptosis-inducing characteristics of these complexes were investigated. The complexes exhibited cytotoxicity against various human cancer cell lines. BEL-7402 cells displayed the highest sensitivity to 1, accounted for by the greatest cellular uptake. Complex 1 was shown to accumulate preferentially in the nuclei of BEL-7402 cells and cause DNA damage and induce apoptosis, which involved cell cycle arrest and reactive oxygen species generation.
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Keywords: DNA; Ruthenium(II) complexes; antitumor; apoptosis

Document Type: Research Article

Affiliations: 1: School of Life Science and Biopharmaceutical, Guangdong Pharmaceutical University, Guangzhou, PR China 2: Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, PR China

Publication date: January 17, 2016

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