title: Effect of weak-, non-, and co-carcinogenic chemicals on 2-acetylaminofluorene-induced mutation in Salmonella typhimurium.
abstract: The effects of various weak, non-, and co-carcinogenic chemicals on 2-acetylaminofluorene-induced mutation in Salmonella typhimurium were studied. We found that a single co-mutagen could provide for either enhanced or decreased mutagenesis. A differential effect on mutagenic expression was dependent upon: (1) the type of inducer of S-9 (supernatant from liver homogenate centrifuged at 9000 x g) liver enzymes; (2) the amount of S-9 enzyme preparation employed; and (3) the combined dose of mutagen plus co-mutagen studied. No effect was observed in the absence of S-9. Our data suggest that in S. typhimurium a primary factor in the alteration of mutagenesis by a combination of chemicals is changes in metabolism of the principal mutagen.
mesh_terms: D015073:2-Acetylaminofluorene / Q000633:toxicity*; D000818:Animals; D002273:Carcinogens / Q000633:toxicity*; D004347:Drug Interactions; D004790:Enzyme Induction / Q000187:drug effects; D008099:Liver / Q000201:enzymology; D008297:Male; D009153:Mutagens; D051381:Rats; D012486:Salmonella typhimurium / Q000187:drug effects / Q000235:genetics*
chemical_list: D002273:Carcinogens; D009153:Mutagens; D015073:2-Acetylaminofluorene