Two silver(I) aminoacidate complexes {[Ag4(L-HAla)4(NO3)3]NO3}n (AgAla, complex 1, Ala = alanine) and {[Ag(L-Phe)]}n (AgPhe, complex 2, Phe = phenylalanine) were prepared and characterized by elemental, spectral analysis (FT-IR, NMR techniques) and single crystal X-ray analysis in solid state and their solution stability was measured in biological testing time-scale by 1H NMR. The bridging coordination modes of the zwitterionic Ala and deprotonated Phe ligands led to the formation of 1D polymeric chains of the complexes. The significant argentophilic interactions are presented in the structure of AgAla. Antimicrobial testing of prepared Ag(I) complexes was evaluated by IC50 and MIC values and were compared with AgGly, silver(I) sulfadiazine and AgNO3 samples. Moreover, MTS test was used to the testing of broad range antiproliferative activity of studied compounds against different cancer cell lines and also to the investigation of calf thymus DNA interactions by absorption spectroscopy, fluorescence spectroscopy, Ethidium bromide/Hoechst 33258 displacement experiments and circular dichroism spectroscopy. To evaluate the pUC19 DNA fragmentation by silver(I) complexes, the agarose gel electrophoresis was used. In addition to biological evaluation we used lipophilicity measurement results in the discussion about structure-activity relationship (SAR).
- MeSH
- alanin chemie metabolismus farmakologie MeSH
- antibakteriální látky chemie metabolismus farmakologie MeSH
- antifungální látky chemie metabolismus farmakologie MeSH
- antitumorózní látky chemie metabolismus farmakologie MeSH
- Candida parapsilosis účinky léků MeSH
- DNA metabolismus MeSH
- Escherichia coli účinky léků MeSH
- fenylalanin chemie metabolismus farmakologie MeSH
- katalýza MeSH
- komplexní sloučeniny chemie metabolismus farmakologie MeSH
- léky antitumorózní - screeningové testy MeSH
- lidé MeSH
- mikrobiální testy citlivosti MeSH
- molekulární struktura MeSH
- nádorové buněčné linie MeSH
- proliferace buněk účinky léků MeSH
- skot MeSH
- Staphylococcus aureus účinky léků MeSH
- štěpení DNA účinky léků MeSH
- stříbro chemie MeSH
- vztahy mezi strukturou a aktivitou MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- skot MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
We report DNA cleavage by ruthenium(II) arene anticancer complex [(η(6)-p-terp)Ru(II)(en)Cl](+) (p-terp=para-terphenyl, en=1,2-diaminoethane, complex 1) after its photoactivation by UVA and visible light, and the toxic effects of photoactivated 1 in cancer cells. It was shown in our previous work (T. Bugarcic et al., J. Med. Chem. 51 (2008) 5310-5319) that this complex exhibits promising toxic effects in several human tumor cell lines and concomitantly its DNA binding mode involves combined intercalative and monofunctional (coordination) binding modes. We demonstrate in the present work that when photoactivated by UVA or visible light, 1 efficiently photocleaves DNA, also in hypoxic media. Studies of the mechanism underlying DNA cleavage by photoactivated 1 reveal that the photocleavage reaction does not involve generation of reactive oxygen species (ROS), although contribution of singlet oxygen ((1)O2) to the DNA photocleavage process cannot be entirely excluded. Notably, the mechanism of DNA photocleavage by 1 appears to involve a direct modification of mainly those guanine residues to which 1 is coordinatively bound. As some tumors are oxygen-deficient and cytotoxic effects of photoactivated ruthenium compounds containing {Ru(η(6)-arene)}(2+) do not require the presence of oxygen, this class of ruthenium complexes may be considered potential candidate agents for improved photodynamic anticancer chemotherapy.
- MeSH
- antitumorózní látky chemická syntéza farmakologie MeSH
- DNA chemie MeSH
- ethylendiaminy chemie MeSH
- fotochemoterapie MeSH
- kationty dvojmocné MeSH
- komplexní sloučeniny chemická syntéza farmakologie MeSH
- lidé MeSH
- nádorové buněčné linie MeSH
- organokovové sloučeniny chemická syntéza farmakologie MeSH
- plazmidy chemie MeSH
- ruthenium chemie MeSH
- sekvence nukleotidů MeSH
- singletový kyslík chemie MeSH
- štěpení DNA účinky léků účinky záření MeSH
- světlo MeSH
- terfenylové sloučeniny chemie MeSH
- viabilita buněk účinky léků účinky záření MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
Six mixed-ligand copper(II) complexes with the composition [Cu(qui)(L)]BF(4)·xH(2)O (1-6), where Hqui=2-phenyl-3-hydroxy-4(1H)-quinolinone, L=2,2'-bipyridine (bpy) (1), 1,10-phenanthroline (phen) (2), bis(2-pyridyl)amine (ambpy) (3), 5-methyl-1,10-phenanthroline (mphen) (4), 5-nitro-1,10-phenanthroline (nphen) (5) and bathophenanthroline (bphen) (6), were prepared, fully characterized and studied for their in vitro cytotoxicity on human osteosarcoma (HOS) and human breast adenocarcinoma (MCF7) cancer cell lines. The overall promising results of the cytotoxicity were found for all the complexes, while the best results were achieved for complex 6, with IC(50)=2.6 ± 0.8 μM (HOS), and 1.3 ± 0.5 μM (MCF7). The interactions of the Cu(II) complexes 1-6 with calf thymus DNA were investigated by the UV-visible spectral titration. An agarose-gel electrophoretic method of oxidative damage determination to circular plasmid pUC19 was used to assess the ability of the complexes to act as chemical nucleases. A high effectiveness of DNA cleavage was observed for 2, 4 and 5. In vitro antioxidative activity of the complexes was studied by the superoxide dismutase-mimic (SOD-mimic) method. The best result was afforded by complex 1 with IC(50)=4.7 ± 1.0 μM, which corresponds to 10.2% of the native Cu,Zn-SOD enzyme activity. The ability of the tested complexes to interact with sulfur-containing biomolecules (cysteine and reduced glutathione) at physiological levels was proved by electrospray-ionization mass spectrometry (ESI-MS).
- MeSH
- chinoliny chemie MeSH
- hmotnostní spektrometrie s elektrosprejovou ionizací MeSH
- ligandy MeSH
- molekulární mimikry MeSH
- Ramanova spektroskopie MeSH
- spektrofotometrie ultrafialová MeSH
- spektroskopie infračervená s Fourierovou transformací MeSH
- štěpení DNA účinky léků MeSH
- superoxiddismutasa metabolismus MeSH
- techniky in vitro MeSH
- termogravimetrie MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- MeSH
- inhibitory enzymů chemická syntéza chemie farmakologie MeSH
- molekulární struktura MeSH
- organické sloučeniny křemíku chemická syntéza chemie farmakologie MeSH
- restrikční endonukleasy typu II antagonisté a inhibitory metabolismus MeSH
- štěpení DNA účinky léků MeSH
- stereoizomerie MeSH
- vztahy mezi strukturou a aktivitou MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
