Effects of vitamin A on the metabolism and mutagenicity of 2AAF in vitro and on the covalent binding to rat liver DNA/RNA in vivo.
Vitamin A has been shown to affect the in vitro metabolism of 2AAF. At low concentrations of retinol or retinyl palmitate, a decreased production of ring-hydroxylated as well as deacetylated and N-hydroxylated metabolites was observed, measured by high performance liquid chromatography. The increased mutagenicity of 2AAF observed after addition of vitamin A in the Ames test cannot therefore be explained as a result of stimulated N-hydroxylation. However, the addition of retinol was found to enhance the mutagenicity of the metabolite N-OH-2AAF in the presence of an S-9 fraction of rat liver homogenate. No differences with regard to the covalent binding of 2AAF or its metabolites to rat liver DNA/RNA in vivo could be demonstrated in animals fed diets with normal or high vitamin A content.
L
L
Rondahl
L
L
Busk
U G
UG
Ahlborg
K
K
Bergman
D015073:2-Acetylaminofluorene / Q000378:metabolism* / Q000494:pharmacology; D000818:Animals; D001711:Biotransformation / Q000187:drug effects; D004247:DNA / Q000378:metabolism; D066298:In Vitro Techniques; D008099:Liver / Q000187:drug effects / Q000378:metabolism; D009153:Mutagens; D012313:RNA / Q000378:metabolism; D051381:Rats; D011919:Rats, Inbred Strains; D014801:Vitamin A / Q000494:pharmacology*
D009153:Mutagens; D014801:Vitamin A; D012313:RNA; D004247:DNA; D015073:2-Acetylaminofluorene