Abstract
Pregnant Charles River CD1 mice were treated with a semipurified extract ofFusarium moniliforme culture containing 0, 12.5, 25, 50 or 100 mg FB1/kg each day orally (diluted in distilled water) between gestational days (GD) 7 and 15 to evaluate the developmental toxicity of FB1. Following sacrifice of dams on GD 18, litters were examined for gross abnormalities and divided equally for skeletal or visceral examination by routine techniques. Significant maternal mortality was observed at doses of 50 and 100 mg FB1/kg. Dose-dependant decreases in maternal body weight gains, number of live offsprings per litter, and mean body weight of the offspring were produced at FB1 doses of 25 mg/kg or higher. The percentage of implants resorbed increased at all doses in a dose-dependant manner. A dose-dependant increase, except at the lowest dose tested, in the incidence of ossification deficits involving digits and sternum, short and wavy ribs, and hydrocephalus of lateral and third ventricles was also evident. Cleft palate was seen only at the highest FB1 dose. Maternal intoxication manifested as a dose-dependant increase in the severity of ascites associated mainly with increased histopathologic scores reflecting hepatocellular damage at day 18. Concommittant increases in serum alanine amino transferase (ALT) on GD 12, reflecting parenchymal liver cell damage, was also observed at all doses above 12.5 mg of FB1/kg. These results suggest that FB1-containingF. moniliforme culture extract is developmentally toxic in mice, and that this toxicity may be mediated by maternal hepatotoxicity.
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Gross, S.M., Reddy, R.V., Rottinghaus, G.E. et al. Developmental effects of fumonisin B1-containingFusarium moniliforme culture extract in CD1 mice. Mycopathologia 128, 111–118 (1994). https://doi.org/10.1007/BF01103018
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DOI: https://doi.org/10.1007/BF01103018