Suspected carcinogen

Prostate mutations in rats induced by the suspected human carcinogen 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine.

Male lacl transgenic rats were fed a diet containing 200 ppm of 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP), a heterocyclic amine present in cooked meats. PhIP was found to be a powerful prostate mutagen. After 61 days of treatment, the lacl mutant frequency was 71 x 10(-5), >20-fold higher than the spontaneous mutant frequency of 3.2 x 10(-5). The predominant PhIP-induced mutations ...

A known human carcinogen.

Carcinogen risk assessment.

A molecular biological rationale for the linear nonthreshold dose-response pattern for carcinogenesis is presented based on the mutagenic activation of oncogens as the basis of initiation. The approach assumes that the linear nonthreshold dose pattern at very low doses applies only to tissues that are promoted by intrinsic and extrinsic agents other than the one being modeled, and that risk is ...

Guidelines for Carcinogen Risk Assessment

Guidelines for Carcinogen Risk Assessment