Mixed Ternary Mononuclear Copper(II) Complexes Based on Valproic Acid with 1,10-Phenanthroline and 2,2’-Bipyridine Ligands: DNA Interaction and Cytotoxicity in V79 Cells
作者:Claus Pich、Paulo dos Santos、Tatiana Fortunato、Marilda Chiarello、Iuri de Oliveira、Bárbara Soares、Nour Ghermani、Miriana Machado、Mariana Roesch-Ely、Françoise Dumas、Hernan Terenzi、João Henriques、Sidnei Moura
DOI:10.21577/0103-5053.20180229
日期:——
This paper reports the DNA interaction and cytotoxicity of binary and ternary copper(II) complexes of valproic acid with phenanthroline or bipyridine and the complementary characterization of Cu(Valp)(2) Bipy by crystallography. Circular dichroism, plasmid and oligonucleotide assays have shown that the complexes interact with DNA in different manners and are able to cleave plasmid DNA and oligonucleotides at concentrations from 10 to 1000 mol L-1. The plasmid DNA cleavage is enhanced 650, 375 and 285 times by photo activation with UVB light for the complexes Cu(Valp)(2)Phen, Cu(Valp)(2)Bipy and Cu-2(Valp)(4), respectively. Cytotoxicity assays demonstrated that V79 cells were more sensitive to Cu-II derivatives than sodium valproate as evaluated by 3-(4,5-dimethylthiazol-2yl)-2,5-diphenyl tetrazolium bromide (MTT) and clonogenic assays, where the cytotoxic profile of the compounds was: Cu(Valp)(2)Phen higher than Cu(Valp)(2)Bipy, higher than Cu-2(Valp)(4). Therefore, we report two copper complexes, which interact with DNA and promote its cleavage, leading to an enhanced cytotoxicity when compared to valproic acid.
THERAPEUTICAL USE OF TERNARY COMPLEXES OF VALPROIC ACID
申请人:Sylla-Iy Arreta Veitia Maite
公开号:US20120142658A1
公开(公告)日:2012-06-07
A method of treating a human subject having a condition responsive to valproic acid therapy, includes administering to the subject an effective amount of a metal-based ternary complex of valproic acid with nitrogen donor ligands, in particular with diimines or diamines.