DNA breaking activity of the pesticide malathion and its metabolite assayed by the single cell gel electrophoresis [comet assay]

• Autorzy: Blasiak J. , Trzeciak A. , Jaloszynski P. , Szyfter K. , Osiecka R. , Blaszczyk A.
• Języki publikacji: EN

Abstrakty

EN

Genotoxicity of pesticides is of a special significance because of the common presence of these agents in the environment and the long latent period between the exposure and effects becoming apparent. The DNA damaging effects of the commonly used organophosphorus insecticide malathion and its major metabolite malaoxon were evaluated. Freshly isolated human peripheral blood lymphocytes were incubated with 75 and 300 µM of malathion or malaoxon for 1 h. Sensitive alkaline microgel single cell electrophoresis (comet assay) was used to assess damage to the lymphocyte DNA. Possible lesions detected by this technique could be single- and double-strand DNA breaks as well as alkali-labile sites. Malaoxon, unlike malathion, induced DNA damage in a dose-dependent manner. The effect of malaoxon at 300 µM was comparable with the effect of hydrogen peroxide at 20 µM. Well recognized genotoxic effects of malathion may be a consequence either of the interaction of its major metabolite malaoxon with DNA or use of technical grade of malathion which contains impurities, including malaoxon. However, humans are exposed to the pesticide of technical grade and have the ability to metabolize malathion to malaoxon and in this regard malathion used as an organophosphorus insecticide can be considered as a genotoxic substance.

Słowa kluczowe

EN

metabolite; malaoxon; malathion; genotoxicity; human lymphocyte; metabolic transformation; lymphocyte; environment; organophosphorus insecticide; pesticide; DNA damage

• Wydawca: -
• Czasopismo: Cellular and Molecular Biology Letters
• Rocznik: 1997
• Tom: 02
• Numer: 4
• Opis fizyczny: p.389-397,fig.

Twórcy

autor

Blasiak J.

• University of Lodz, Banacha 12-16, 90-237 Lodz, Poland

autor

Trzeciak A.

autor

Jaloszynski P.

autor

Szyfter K.

autor

Osiecka R.

autor

Blaszczyk A.

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