title: Pt(II) complexes with N-(3-pyridyl)-2-(4-(trifluoromethyl)phenyl)diazenecarboxamide and their reactions with glutathione.
abstract: The reaction between [PtCl(dmso)(en)]Cl (dmso=dimethyl sulfoxide, en=ethylenediamine) and N-(3-pyridyl)-2-(4-(trifluoromethyl)phenyl)diazenecarboxamide (L) was studied using multinuclear NMR spectroscopy. The water-soluble complexes [PtCl(en)(L-N1)](+) (1) and [Pt(en)(L-N1)(2)](2+) (2) were isolated and their reactions with glutathione (GSH) were investigated to assess the oxidation properties of coordinated L. Both species 1 and 2 oxidized GSH to GSSG, while the reduced form of L (semicarbazide, SL) remained coordinated to Pt(2+). In complex 1 the labile chloride ion was substituted by the thiol moiety of GSH, which gave rise to the release of en in excess GSH over a period of 7 days. Complexes [PtCl(dmso)(en)]Cl, 1, 2 and ligand L were tested against T24 bladder carcinoma cells. Ligand L and complexes 1 and 2 showed higher cytotoxicity than [PtCl(dmso)(en)]Cl.
authors.affiliation: Faculty of Chemistry and Chemical Technology, University of Ljubljana, Askerceva 5, 1000 Ljubljana, Slovenia. sabina.grabner@uni-lj.si
authors.forename: Sabina
authors.initials: S
authors.lastname: Grabner
authors.forename: Janez
authors.initials: J
authors.lastname: Kosmrlj
authors.forename: Natasa
authors.initials: N
authors.lastname: Bukovec
authors.forename: Maja
authors.initials: M
authors.lastname: Cemazar
mesh_terms: D000970:Antineoplastic Agents / Q000737:chemistry / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D005978:Glutathione / Q000737:chemistry*; D006801:Humans; D006843:Hydrocarbons, Chlorinated / Q000737:chemistry; D007094:Imides / Q000737:chemistry* / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009944:Organoplatinum Compounds / Q000737:chemistry* / Q000494:pharmacology; D010084:Oxidation-Reduction; D010984:Platinum / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry* / Q000494:pharmacology; D013438:Sulfhydryl Compounds / Q000737:chemistry; D013997:Time Factors; D014407:Tumor Cells, Cultured; D001749:Urinary Bladder Neoplasms / Q000188:drug therapy
chemical_list: D000970:Antineoplastic Agents; D006843:Hydrocarbons, Chlorinated; D007094:Imides; D009944:Organoplatinum Compounds; D011725:Pyridines; D013438:Sulfhydryl Compounds; D010984:Platinum; D005978:Glutathione