Subchronic mycotoxicoses in Wistar rats: assessment of the in vivo and in vitro genotoxicity induced by fumonisins and aflatoxin B(1), and oxidative stress biomarkers status

THEUMER MG, CÁNEPA MC, LÓPEZ AG, MARY VS, DAMBOLENA JS, RUBINSTEIN HR

ELSEVIER IRELAND LTD

Año: 2010 vol. 268 p. 104 - 104

Some evidence suggests that fumonisin B1 (FB1), a worldwide toxic contaminant of grains produced by Fusarium verticillioides, exhibits an oxidative stress mediated genotoxicity. We studied the DNA damage (by the alkaline comet and the micronucleus tests) and biomarkers of cellular oxidative stress (malondialdehyde, MDA; catalase, CAT; and superoxide dismutase, SOD) in spleen mononuclear cells of male Wistar rats subchronically (90 days) fed on a control experimental diet (CED) or poisoned with experimental diets contaminated with a culture material containing 100 ppm of FB1 (FED), with 40 ppb of aflatoxin B1 (a common toxic co-contaminant in cereals, AFB1ED), and with a mixture of both toxins (MED). The DNA damage was found in 13.7%, 81.7%, 98.0% and 99.3% (comet assay) and in 2.8%, 7.0%, 10.8% and 8.8% (micronucleus technique) in groups CED, FED, AFB1ED and MED, respectively.