Synthesis, structural characterization, cytotoxic properties and DNA binding of a dinuclear copper(II) complex
authors Ferreira, BJML; Brandao, P; Meireles, M; Martel, F; Correia-Branco, A; Fernandes, DM; Santos, TM; Felix, V
nationality International
journal JOURNAL OF INORGANIC BIOCHEMISTRY
author keywords Dinuclear copper(II) complex; Phenanthroline; Adenine; HeLa; Caco-2; DNA-binding
keywords PI-PI STACKING; CRYSTAL-STRUCTURE; ANTICANCER ACTIVITY; MAGNETIC-PROPERTIES; NUCLEASE ACTIVITY; CU(II) COMPLEXES; 1,10-PHENANTHROLINE COPPER; PLATINUM COMPLEXES; ANTITUMOR-ACTIVITY; METAL-COMPLEXES
abstract In this study a novel dinuclear copper(II) complex with adenine and phenanthroline has been synthesized and its structure determined by single crystal X-ray diffraction. In the dinuclear complex [Cu-2(mu-adenine)(2)(phen)(2)(H2O)2](NO3)(4)center dot 0.5H(2)O (phen = 1,10-phenanthroline) (1) the two Cu(II) centres exhibit a distorted square pyramidal coordination geometry linked by two nitrogen donors from adenine bridges leading to a Cu-Cu distance of 3.242(3) angstrom. Intramolecular and intermolecular pi center dot center dot center dot pi interactions as well as an H-bonding network were observed. The antitumor capacity of the complex has been tested in vitro against human cancer cell lines, cervical carcinoma (HeLa) and colorectal adenocarcinoma (Caco-2), by metabolic tests, using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide as reagent. The complex 1 has remarkable low IC50 values of 0.87 +/- 0.06 mu M (HeLa) and 0.44 +/- 0.06 mu M (Caco-2), when compared with values for cisplatin against the same cell lines. The interaction of complex 1 with calf thymus DNA (CT DNA) was further investigated by absorption and fluorescence spectroscopic methods. A binding constant of 5.09 x 10(5) M-1 was obtained from UV-vis absorption studies. (C) 2016 Elsevier Inc. All rights reserved.
publisher ELSEVIER SCIENCE INC
issn 0162-0134
year published 2016
volume 161
beginning page 9
ending page 17
digital object identifier (doi) 10.1016/j.jinorgbio.2016.04.026
web of science category Biochemistry & Molecular Biology; Chemistry, Inorganic & Nuclear
subject category Biochemistry & Molecular Biology; Chemistry
unique article identifier WOS:000378977700002
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journal impact factor 3.212
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