The only 3a complex showed negligible SOD-like activity but moder

The only 3a complex showed negligible SOD-like activity but moderate ability to reduction H2O2. Moreover, Cu(II) complexes were capable to decrease ROS level in melanoma cells. Those cells constantly exposed to oxidative stress induced by UV radiation and quinone toxicity from melanin synthesis are very efficient in scavenging ROS. Thus, click here the capacity of tested compounds to neutralize

hydrogen peroxide was shown to substantially support natural mechanisms existing in those cells. Acknowledgments We sincerely thank Dr. Roman Modranka and Dr. Magdalena Miernicka from Medical University in Łódź for providing Trolox assay and synthesis of ligands, respectively. Financial support from Collegium Medicum of Nicolaus Copernicus University (Grant No. 411) and Medical University of Łódź (Grant Nos. 507-13-041 and 503/3-066-02/AZD4547 in vivo 503-01 to E. Budzisz, 502-17-664 to K. Malinowska, and 503/1-156-01/503-01 to M. Czyz) are gratefully

acknowledged. Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. References Al-Allaf TAK, Rashan LJ (2001) Stereochemistry—cis- and trans-platinum and palladium complexes: a comparative study review as antitumour this website agents. Boll Chim Farm 140:205–210PubMed Beers R, Sizer T (1952) A spectrophotometric method for measuring the breakdown of hydrogen peroxide by catalase. J Biol Chem 195:133–140PubMed Budzisz E, Miernicka M, Lorenz IP, Mayer P, Krajewska U, Rozalski M (2009) Synthesis and X-ray structure of platinum(II), palladium(II) MycoClean Mycoplasma Removal Kit and copper(II) complexes with pyridine–pyrazole ligands: influence of ligands structure on cytotoxic activity. Polyhedron 28:637–645CrossRef Budzisz E, Miernicka M, Lorenz IP, Mayer P, Balcerczak E, Krajewka U, Rozalski M (2010) Synthesis, X-ray structures and cytotoxic activity of

platinum(II), palladium(II) and copper(II) complexes with chelating ligands. Eur J Med Chem 45:2613–2621PubMedCrossRef Day BJ (2009) Catalase and glutathione peroxidase mimics. Biochem Pharmacol 77:285–296PubMedCrossRef Duivenvoorden WCM, Liu Y, Schatte G, Kraatz HB (2005) Synthesis of redox-active ferrocene pyrazole conjugates and their cytotoxicity in human mammary adenocarcinoma MCF-7 cells. Inorg Chim Acta 358:3183–3189CrossRef Eicher T, Hauptmann S (ed) (1995) The chemistry of heterocycles structure, reaction synthesis and applications (trans: H. Suschitzky, J. Suschitzky) Georg Thime Verlag, Stuttgart, p 184 Eliguero J, Katritzky AR, Pees CW, Scriven EF (1997) Comprehensive heterocyclic chemistry II, vol 3. Pergamon, Oxford Ercal N, Gurer-Orhan H, Aykin-Burns N (2001) Toxic metals and oxidative stress part I: mechanisms involved in metal induced oxidative damage.

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