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DNA Damage Induced by New Pophyrins of Different Chemical Structure  

Galina Hovhannisyan (Department of Genetics and Cytology, Yerevan State University)
Samvel Haroutiunian (Department of Molecular Physics, Yerevan State University)
Kristina Margaryan (Department of Genetics and Cytology, Yerevan State University)
Robert Ghazaryan (Department of Pharmacological Chemistry, Yerevan Medical State University)
Rouben Aroutiounian (Department of Genetics and Cytology, Yerevan State University)
Publication Information
Korean Journal of Environmental Biology / v.23, no.4, 2005 , pp. 379-382 More about this Journal
Abstract
The new cationic meso-substituted N-quarternized 4-pyridylporphyrins and their metal derivatives were synthesized as novel chemotherapeutics. The level of DNA damage induced by porphyrins TOBut4PyP, TOBut4PyP, TOEt4PyPMn and TOBut4PyPMn and its dependence on the chemical structure of compounds were analyzed by the Comet-assay. On the base of data obtained, the investigated porphyrins may be arranged by their genotoxic activity in the following order: TOEt4PyP>TOEt4PyPMn>TOBut4PyP>TOBut4PyPMn. Thus, i) the genotoxicity of the Mn-derivatives of TOEt4PyP and TOBut4PyP is higher than the original porphyrins and ii) the genotoxicity of TOEt4PyP and TOEt4PyPMn is increased after substitution of a butyl radical for ethyl one. The applied Comet-assay permits to reveal the dependence of DNA damage induction on the chemical structure of porphyrins.
Keywords
Porphyrins; Comet-assay; human leukocytes; DNA strand breaks;
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