Abstract
N-(2,3-Epoxy-propyl)-phthalimide (EPP) was tested for genetic activity in the Salmonella/microsome mutagenicity test. Concentration-dependent mutagenicity was demonstrated in S. typhimurium strains TA1535, TA1537 and TA100 with and without rat S9. It was inactive in strain TA1538, and active without rat S9 in TA98 at the high dose. EPP induced 6-thioguanine-resistant mutants of Chinese hamster ovary cells in the absence of an exogenous activating system. EPP produced dose-dependent enhancement of SA7 virus transformation of primary hamster-embryo cells, and transformed secondary hamster-embryo cells in a non-dose-related fashion. At a dose of 5 g/kg p.o. or i.m., EPP was inactive in the host-mediated assay using C57B1/6XC3H mice and S. typhimurium strain TA1635. Murine testicular DNA synthesis was not inhibited by oral administration of EPP at 1000 mg/kg.
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