Abstract
Swiss mice were fed for 2, 4 and 8 weeks wheat grains treated with 1, 2, and 4 g benomyl/kg and stored for 6 and 12 weeks. The maximum effect of benomyl on the induction of chromosomal aberrations was observed after feeding mice for 8 weeks with wheat grains treated with 4 g benomyl/kg and stored for 12 weeks. Its proportion differed significantly in bone marrow and spermatocyte cells, 15±0.51% vs. 13.4±0.66%, respectively, from that in nontreated mice (background level), 4.4±0.24% and 3.8±0.20%, respectively. Lengthening the storage period of treated wheat grains caused a dose-dependent increase in the frequency of sister chromatid exchanges: 8.61±0.34 vs. 4.16±0.06/cell. The proportion of sperm-head abnormalities increased by lengthening the period of storage and feeding: 7.7±0.41% vs. 3.25±0.12%. In another experiment mice were orally treated by gavage with benomyl at 50, 100, 150, 200 mg/kg; a significant and dose-dependent increase in sperm-head abnormalities was observed. These findings demonstrate that benomyl (a 50% wettable powder formulation) and its residues in wheat grains are genotoxic in mice.
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Amer, S.M., Donya, S.M. & Aly, F.A.E. Genotoxicity of benomyl and its residues in somatic and germ cells of mice fed on treated stored wheat grains. Arch Toxicol 77, 712–721 (2003). https://doi.org/10.1007/s00204-003-0464-9
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DOI: https://doi.org/10.1007/s00204-003-0464-9