An assessment of the genetic toxicology of antimony trioxide
- PMID: 9711267
- DOI: 10.1016/s1383-5718(98)00065-5
An assessment of the genetic toxicology of antimony trioxide
Abstract
Antimony trioxide (Sb2O3, CAS 1309-64-4) has been examined in a range of in vitro and in vivo genotoxicity assays. Negative results were obtained with the Salmonella/microsome assay and the L5178Y mutation assay, but a positive response was observed in the in vitro cytogenetic assay using isolated human peripheral lymphocytes. However, in vivo, antimony trioxide was non-clastogenic in the mouse bone marrow micronucleus assay, following oral gavage administration for 1, 7, 14 or 21 days at dose levels of up to 5000 mg/kg (single dose) or 1000 mg/kg (repeat dose). A negative result was also obtained in the in vivo rat liver DNA repair (unscheduled DNA synthesis) assay following a single oral gavage administration of doses up to 5000 mg/kg. These data show no genotoxicity for antimony trioxide in vivo and do not confirm a previous report of clastogenicity in the mouse on repeated dosing. It is concluded that antimony trioxide is not genotoxic in vivo and does not present a genotoxic hazard to humans.
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