Carbonyl-heterobimetallic Ru(II)/Fe(II)-complexes containing polypyridyl ligands: synthesis, characterization, cellular viability assays and interactions with biomolecules.
DÁVILA-RODRÍGUEZ, María-José; BAROLLI, João Paulo; OLIVEIRA, Katia Mara de; COLINA-VEGAS, Legna; MIRANDA, Fábio da Silva; CASTELLANO, Eduardo Ernesto; POELHSITZ, Gustavo Von; BATISTA, Alzir Azevedo.
DÁVILA-RODRÍGUEZ, María-José; BAROLLI, João Paulo; OLIVEIRA, Katia Mara de; COLINA-VEGAS, Legna; MIRANDA, Fábio da Silva; CASTELLANO, Eduardo Ernesto; POELHSITZ, Gustavo Von; BATISTA, Alzir Azevedo.
 Abstract: This paper describes on the interaction studies of carbonyl heterobimetallic compounds of Ru(II)/Fe(II) containing polypyridyl ligands, with general formula ct-[RuCl(CO)(N-N)(dppf)]PF6, N-N=1,10-phenanthroline (phen) 5; dipyrido[3,2-f:2',3'-h]quinoxaline (dpq) 6; dipyrido[3,2-a:2',3'-c]phenazine (dppz) 7; dipyrido[ 3,2-f:2',3'-h]quinoxalino[2,3-b]quinoxaline (dpqQX) 8 and dppf=1,1'-bis(diphenylphosphino) ferrocene], with calf thymus DNA (ct-DNA) and bovine serum albumin (BSA). Also, it describes the cellular viability assays of these complexes in tumorigenic and non-tumorigenic cell lines. The carbonyl complexes 5-8 and their respective precursors with formula cis-[RuCl2(N-N)(dppf)], N-N=phen (1), dpq (2), dppz (3) and dpqQX (4), were characterized by elemental analysis and spectroscopic techniques (FTIR, UV-vis, 1H and 31P{1H} NMR). Also, a cyclic voltammetry study was performed for all complexes. The crystal structure of the complex 3 is presented and discussed. Spectrofluorimetric titrations shows spontaneous and strong interaction of 5-8 with BSA, through a static quenching mechanism, resulting in binding constants in the order of 104-106 L mol-1, at 310 K. Viscosity measurements and circular dichroism spectra prompts interactions of 5-8 with ct-DNA via non-classical intercalations or by an electrostatic pathway. MTT assays in breast tumor cells MDA-MB-231 and in non-tumorigenic cells MCF-10A and V79-4 cell lines revealed IC50 values ranging from 0.19 to 1.11 µmol L-1, 1.07-3.18 µmol L-1 and 1.29-3.85 µmol L-1 respectively, for complexes 5-8. | |
| Archives of Biochemistry and Biophysics |
| v. 660, p. 156-167 - Ano: 2018 |
| Fator de Impacto: 3,118 |
| http://dx.doi.org/10.1016/j.abb.2018.10.020 |  @article={002910182,author = {DÁVILA-RODRÍGUEZ, María-José; BAROLLI, João Paulo; OLIVEIRA, Katia Mara de; COLINA-VEGAS, Legna; MIRANDA, Fábio da Silva; CASTELLANO, Eduardo Ernesto; POELHSITZ, Gustavo Von; BATISTA, Alzir Azevedo.},title={Carbonyl-heterobimetallic Ru(II)/Fe(II)-complexes containing polypyridyl ligands: synthesis, characterization, cellular viability assays and interactions with biomolecules},journal={Archives of Biochemistry and Biophysics},note={v. 660, p. 156-167},year={2018}} |
