title: Synthesis and characterization of the Zn(II) and Cu(II) piperidinyl isoeuxanthone complexes: DNA-binding and cytotoxic activity.
abstract: Two new complexes ZnL(2)x2H(2)O (1) and CuL(2)x2H(2)O (2) (HL=1-hydroxy-6-(2-(1-piperidinyl)ethoxy)xanthone) have been synthesized and characterized. Their interactions with calf thymus DNA (ct DNA) were investigated by absorption spectroscopy, fluorescence spectroscopy, ethidium bromide (EB) displacement experiments, circular dichroism spectroscopy and viscosity measurements. Experimental results suggested that there were intercalative interactions of the complexes with DNA. The binding affinity of complex 2 was higher than that of 1. In addition, the cytotoxic effects of both complexes were evaluated with lung adenocarcinoma (GLC-82), esophagus squamous cancer (ECA109) and human gastric cancer (SGC7901) cells using MTT assay. Both were potent exhibiting significant cytotoxicity in vitro.
authors: College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, PR China.
authors: Hui-Fang
authors: HF
authors: Wang
authors: Rui
authors: R
authors: Shen
authors: Ning
authors: N
authors: Tang
mesh_terms: D000230:Adenocarcinoma / Q000188:drug therapy; D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry / Q000494:pharmacology*; D002294:Carcinoma, Squamous Cell / Q000188:drug therapy; D002417:Cattle; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D003300:Copper / Q000737:chemistry / Q000494:pharmacology*; D004247:DNA / Q000378:metabolism*; D004354:Drug Screening Assays, Antitumor; D004938:Esophageal Neoplasms / Q000188:drug therapy; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy; D009369:Neoplasms / Q000188:drug therapy*; D019265:Spectroscopy, Near-Infrared; D013274:Stomach Neoplasms / Q000188:drug therapy; D014783:Viscosity; D044004:Xanthones / Q000737:chemistry / Q000494:pharmacology*; D015032:Zinc / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000970:Antineoplastic Agents; D044004:Xanthones; D003300:Copper; D004247:DNA; C427203:calf thymus DNA; C009689:xanthone; D015032:Zinc