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• W2010983722 abstract "Norharman, widely distributed in our environment such as cigarette smoke and cooked foods, is not mutagenic to Salmonella strains, but becomes mutagenic to Salmonella typhimurium TA98 and YG1024 with S9 mix in the presence of aromatic amines, including aniline and o-toluidine. Therefore, we have designated norharman as a co-mutagen. Since, humans are simultaneously exposed to norharman and aromatic amines in daily life, it is important to clarify the mechanisms of its co-mutagenic action to further understanding of the potential genotoxic effects in humans. Regarding the mechanisms of this action of norharman with aniline, a mutagenic compound, 9-(4'-aminophenyl)-9H-pyrido[3,4-b]indole[aminophenylnorharman (APNH)] is produced by their interaction, and converted to the hydroxyamino derivative which eventually forms the DNA adduct, dG-C8-APNH through possible ultimate reactive forms with esterification, and this induces mutations. Also other aminophenyl-beta-carboline compounds, such as 9-(4'-amino-3'-methylphenyl)-9H-pyrido[3,4-b]indole[amino-3'-methylphenylnorharman (3'-AMPNH)], 9-(4'-amino-2'-methylphenyl)-9H-pyrido[3,4-b]indole [amino-2'-methylphenylnorharman (2'-AMPNH)], 9-(4'-aminophenyl)-1-methyl-9H-pyrido[3,4-b]indole[aminophenylharman (APH)] and 9-(4'-amino-3'-methylphenyl)-1-methyl-9H-pyrido[3,4-b]indole[amino-3'-methylphenylharman (AMPH)], have been found on reaction of norharman or harman with aniline or toluidine isomers. These compounds showed mutagenic and clastogenic actions in bacterial and mammalian cells. Among them, APNH demonstrated the most potent activity, and it was most extensively studied. When APNH was administered as a single dose to F344 rats, severe testicular toxicity was observed after 6 days. Moreover, liver preneoplastic lesions (GST-P-positive foci) in the liver clearly developed in animals fed 10-50 ppm of APNH in the diet for 4 weeks. Since, APNH was detected in 24 h urine of rats upon simultaneous administration with norharman and aniline by gavage, it is likely to be also produced from norharman and aniline in the human body. From these findings, it is suggested that aminophenyl-beta-carboline derivatives may be classified as one of the novel types of endogenous mutagens and carcinogens." @default.
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• W2010983722 date "2004-03-01" @default.
• W2010983722 modified "2023-10-13" @default.
• W2010983722 title "Mutagens formed from β-carbolines with aromatic amines" @default.
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• W2010983722 doi "https://doi.org/10.1016/j.jchromb.2003.10.041" @default.
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