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- W2078807600 abstract "The mutagenic activity of some dietary mutagens, 2-amino-3-methylimidazo[4,5-f]quinoline (IQ), 2-amino-6-methyldipyrido[1,2-a:3',2'-d]imidazole (Glu-P-1) and 2-amino-dipyrido[1,2-a:3',2'-d]imidazole (Glu-P-2), was inhibited in the Salmonella-plate test preincubated with heat-inactivated rat intestinal preparations. A similar inhibition was observed by preincubating intestinal preparations with 2-acetylaminofluorene (AAF) and benzo[a]pyrene (B[a]P). The effect was not specific for small intestine and was also obtained with spleen, liver, lung, colon and stomach preparations. Mutagenic activity was not inhibited by beef muscle proteins. Lipids extracted from intestinal mucosa preparations were equally effective as inhibitors of the mutagenic activity. Lipid fractions from intestinal mucosa were capable of inhibiting the formation of activated IQ by mammalian S9, and other components of the intestinal preparations were able to bind the promutagens and their active metabolites. The mutagenic activity of 1-(2-hydroxyethyl)-2-methyl-5-nitroimidazole (metronidazole) and of N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) was also inhibited by intestinal preparations, but not by their lipid fractions. A binding of IQ to intestinal preparations was also demonstrated with HPLC techniques. The data indicate that tissue components may reduce the mutagenic activity of chemicals by interfering with the activation process and by reducing the concentration of the promutagens and their active metabolites at target sites." @default.
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- W2078807600 date "1986-01-01" @default.
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- W2078807600 title "Inhibition of the mutagenic activity of some heterocyclic dietary carcinogens and other mutagenic/carcinogenic compounds by rat organ preparations" @default.
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- W2078807600 doi "https://doi.org/10.1016/0165-1218(86)90015-7" @default.
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