Abstract
Casiopeínas® are mixed-chelate copper complexes with antitumor tested potential. Their activity, both in vitro and in vivo, as antiproliferative, cytotoxic, and genotoxic drugs has been assessed. Biological results of these copper compounds have deserved some of them entering clinical trials. Significant efforts have been devoted to the in-depth identification of their mechanism of action. Using gel electrophoresis analysis, we have previously shown that the interaction of the Casiopeínas® Cas II-gly, [Cu(4,7-dimethyl-1,10-phenanthroline)(glycinate)]NO3 with DNA, triggers the cleavage of the biomolecule by a free radical mechanism. In this work, we further study the behavior of different complexes of the same Casiopeínas® series also including glycinate as co-ligand {Cas VI-gly (5,6 dimethyl-1,10-phenanthroline glycinato copper(II) nitrate), Cas VII-gly (1,10-phenanthroline glycinato copper(II) nitrate), and Cas IX-gly (2,2′-bipyridine glycinato copper(II) nitrate)} and of a Casiopeínas® with a different co-ligand (Cas III-Cs; 4,7-dimethyl-1,10-phenanthroline salicylaldehydato-copper(II) nitrate). While all of them produce DNA degradation, the performance in the presence of a radical scavenger suggests the existence of differences in their mechanism of interaction with DNA.
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Acknowledgments
LB thanks ANII Uruguay for the financial support through the grant BE_INI_2010_1979. Authors would like to thank the Iberoamerican program CYTED, network RIIDFCM (209RT0380), CONACYT 179119 and ICYTDF PINVII-32.
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Becco, L., García-Ramos, J.C., Azuara, L.R. et al. Analysis of the DNA Interaction of Copper Compounds Belonging to the Casiopeínas® Antitumoral Series. Biol Trace Elem Res 161, 210–215 (2014). https://doi.org/10.1007/s12011-014-0098-1
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DOI: https://doi.org/10.1007/s12011-014-0098-1