title: Human breast cell-mediated mutagenesis of mammalian cells by polycyclic aromatic hydrocarbons.
abstract: A system has been developed in which human breast cells activate chemical procarcinogens to mutagenic compounds. The degree of activation is quantitated by the estimation of induction of 6-thioguanine-resistant specific locus mutants in a cocultured Chinese hamster V-79 cell population which does not activate carcinogens. Both mammary stromal and parenchymal cells could activate the procarcinogen 7,12-dimethylbenz(a)anthracene. In addition, it is shown that the two mammary cell populations converted both 7,12-dimethylbenz(a)anthracene and benzo(a)pyrene to water-soluble metabolites. The stromal cells produced substantial amounts of glucuronic acid conjugates, but the parenchymal cells did not. Both cell types metabolize benzo(a)pyrene to the organic-soluble metabolites 9,10- and 7,8-dihydrodiol and both 9- and 3-hydroxybenzo(a)pyrene. These results suggest that the human breast may be a target for polycyclic aromatic hydrocarbon carcinogenesis.
mesh_terms: D015127:9,10-Dimethyl-1,2-benzanthracene / Q000378:metabolism*; D000818:Animals; D001551:Benz(a)Anthracenes / Q000378:metabolism*; D001564:Benzo(a)pyrene; D001580:Benzopyrenes / Q000378:metabolism*; D001711:Biotransformation; D001940:Breast / Q000502:physiology*; D002460:Cell Line; D002478:Cells, Cultured; D006224:Cricetinae; D003412:Cricetulus; D004848:Epithelium / Q000378:metabolism; D005260:Female; D006801:Humans; D008168:Lung; D008321:Mammary Glands, Animal / Q000502:physiology*; D009152:Mutagenicity Tests; D009153:Mutagens / Q000378:metabolism*; D009154:Mutation; D051381:Rats
chemical_list: D001551:Benz(a)Anthracenes; D001580:Benzopyrenes; D009153:Mutagens; D001564:Benzo(a)pyrene; D015127:9,10-Dimethyl-1,2-benzanthracene