title: Inhibitory effects of selenium of the mutagenicity of 2-acetylaminofluorene (AAF) and AAF derivatives.
abstract: Selenium (Se) decreased the mutagenicity of 2-acetylaminofluorene (AAF), N-hydroxy-2-acetylaminofluorene (N-OH-AAF) and N-hydroxyaminofluorene (N-OH-AF) in the Salmonella typhimurium TA 1538 bacterial tester system. Metabolism of AAF and N-OH-AFF to the active mutagen, N-OH-AF, was accomplished by rat liver extracts. Graded decreases in mutagenicity with increasing Se concentrations were observed for each of the three mutagens. Se decreased the mutagenicity of AAF, N-OH-AAF and N-OH-AF to 65, 68 and 61% of their respective controls with mutagen alone. The effective molar ratios of Se to mutagen yielding these decreases were approximately 10:1 (Se:AAF), 10:1 (Se:N-OH-AAF) and 300:1 (Se:N-OH-AF). The largest Se effect observed was accomplished by a molar ratio of 100:1 (Se:N-OH-AAF) yielding 28% of the mutagenicity elicited by N-OH-AAF alone.
mesh_terms: D015073:2-Acetylaminofluorene / Q000037:antagonists & inhibitors* / Q000378:metabolism; D000818:Animals; D004305:Dose-Response Relationship, Drug; D005449:Fluorenes / Q000037:antagonists & inhibitors*; D006881:Hydroxyacetylaminofluorene / Q000031:analogs & derivatives / Q000037:antagonists & inhibitors* / Q000378:metabolism; D066298:In Vitro Techniques; D008862:Microsomes, Liver / Q000378:metabolism; D009154:Mutation / Q000187:drug effects*; D051381:Rats; D012486:Salmonella typhimurium / Q000187:drug effects; D012643:Selenium / Q000008:administration & dosage / Q000494:pharmacology*
chemical_list: D005449:Fluorenes; D006881:Hydroxyacetylaminofluorene; D015073:2-Acetylaminofluorene; D012643:Selenium