Abstract
The oxidation-promoting reactivity of copper(II) complex of aminoglycosidic antibiotic amikacin [Cu(II)-Ami] in the presence of hydrogen peroxide, was studied at pH 7.4, using 2'-deoxyguanosine (dG), pBR322 plasmid DNA and yeast tRNAPhe as target molecules. The mixtures of complex with H2O2 were found to be efficient oxidants, converting dG to its 8-oxo derivative, generating strand breaks in plasmid DNA and multiple cleavages in tRNAPhe. The complex underwent autooxidation as well, with amikacin hydroperoxides as likely major products. This reactivity pattern was found to be due to a combination of metal-bound and free hydroxyl radicals.
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