Abstract
Benzoin (ZOIN) and caprolactam (CAP) were administered by gavage to Fischer 344 rats at a dose of 750 mg/kg and the hepatocytes isolated 12, 24 or 48 h after treatment. The isolated hepatocytes were subsequently examined for the induction of DNA-strand breaks (SB) and unscheduled DNA synthesis (UDS). Neither ZOIN nor CAP induced SB or UDS in hepatocytes, however ZOIN did induce an increase in the fraction of cells in S-phase 24 h after treatment. These results correlate well with the observed lack of carcinogenicity of these compounds.
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