title: Synthesis and characterization of palladium(II) and platinum(II) complexes with Schiff bases derivatives of 2-pyridincarboxyaldehyde. Study of their interaction with DNA.
abstract: Several Schiff bases ligand derivatives of 2-pyridincarboxyaldehyde and different amines, together with their palladium(II) and platinum(II) complexes have been synthesised and characterised. The aim of this study is to probe the influence of substituents beared on the pyridyl/toulene ring at different position to their possible antitumor activity. The amines used were o-, m-, p-toluidine and 4-hydroxyaniline. All the compounds were characterised by elemental analysis, FT-IR spectroscopy, 1H and 195Pt NMR spectroscopy and matrix assisted laser desorption/ionization time-of-flight mass spectroscopy. The formation of DNA adducts were analysed by circular dichroism and electrophoretic mobility. Atomic force microscopy images of the compounds with plasmid DNA pBR322 were also obtained. In all cases changes in the second and tertiary structure of DNA could be observed as a consequence of the covalent interaction of the palladium(II) or platinum(II) ions with the N of the nucleobases. However, there are not significant differences in the behavior of the complexes related to the position of the methyl groups or the presence of the OH group. Values of IC50 were also calculated for the platinum(II) complexes for several pairs of ovarian tumor cell lines which were either sensitive or resistant to cisplatin. Finally in vitro apoptosis studies for platinum(II) complexes with ovarian tumor cell lines A2780/A2780cisR were carried out. The results indicated interesting antiproliferative activity and significant apoptosis induction.
authors.affiliation: Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Catalonia, Spain.
authors.forename: Gloria
authors.initials: G
authors.lastname: García-Friaza
authors.forename: Alfonso
authors.initials: A
authors.lastname: Fernández-Botello
authors.forename: Jose M
authors.initials: JM
authors.lastname: Pérez
authors.forename: Maria J
authors.initials: MJ
authors.lastname: Prieto
authors.forename: Virtudes
authors.initials: V
authors.lastname: Moreno
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D045744:Cell Line, Tumor; D002945:Cisplatin / Q000494:pharmacology; D004247:DNA / Q000737:chemistry* / Q000187:drug effects* / Q000378:metabolism; D018736:DNA Adducts / Q000648:ultrastructure; D005260:Female; D006801:Humans; D020128:Inhibitory Concentration 50; D013058:Mass Spectrometry; D018625:Microscopy, Atomic Force; D015394:Molecular Structure; D009930:Organic Chemicals / Q000737:chemistry* / Q000378:metabolism; D010051:Ovarian Neoplasms / Q000188:drug therapy; D010165:Palladium / Q000737:chemistry* / Q000378:metabolism; D010984:Platinum / Q000737:chemistry* / Q000378:metabolism; D011725:Pyridines / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry* / Q000378:metabolism
chemical_list: C514298:2-pyridincarboxyaldehyde; D000447:Aldehydes; D000970:Antineoplastic Agents; D018736:DNA Adducts; D009930:Organic Chemicals; D011725:Pyridines; D012545:Schiff Bases; D010984:Platinum; D010165:Palladium; D004247:DNA; D002945:Cisplatin