title: Hairpin-shaped tetranuclear palladium(II) complex: synthesis, crystal structure, DNA binding and cytotoxicity activity studies.
abstract: A novel tetranuclear palladium(II) complex [Pd(4)(phen)(4) (micro-pydc)(4)].10H(2)O (phen = 1,10-phenanthroline, pydc = pyridine-3,4-dicarboxylate) has been synthesized and characterized. In the tetranuclear complex, two pairs of dipalladated [Pd(phen)] moieties are bridged together by four pydc, presenting a hairpin molecular shape. The binding of the title complex with fish sperm DNA (FS-DNA) has been investigated by UV spectrum and fluorescence spectrum. All the results indicate that the complex bind to DNA in an intercalative mode and considerating the molecular shape and size, the dipalladated phenanthroline moieties bisintercalate to the base pairs of DNA. Agarose gel electrophoresis assay demonstrates the ability of the complex to cleave the pBR322 plasmid DNA. Cytotoxic activity studies show the complex exhibited good cytotoxic activity against four different cancer cell lines.
authors.affiliation: Laboratory of Coordination Chemisty, Shenyang University of Chemical Technology, Shenyang 110142, China. ejgao@yahoo.com.cn
authors.forename: En-Jun
authors.initials: EJ
authors.lastname: Gao
authors.forename: Ke-Hua
authors.initials: KH
authors.lastname: Wang
authors.forename: Ming-Chang
authors.initials: MC
authors.lastname: Zhu
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000378:metabolism* / Q000494:pharmacology*; D045744:Cell Line, Tumor; D018360:Crystallography, X-Ray; D004247:DNA / Q000378:metabolism*; D004583:Electrons; D006801:Humans; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry / Q000378:metabolism* / Q000494:pharmacology*; D010165:Palladium / Q000737:chemistry*; D012995:Solubility; D013057:Spectrum Analysis; D014867:Water / Q000737:chemistry
chemical_list: D000970:Antineoplastic Agents; D009942:Organometallic Compounds; D014867:Water; D010165:Palladium; D004247:DNA