title: Rabbit alveolar macrophage-mediated mutagenesis of polycyclic aromatic hydrocarbons in V79 Chinese hamster cells.
abstract: Rabbit pulmonary alveolar macrophages (PAM) were used as a metabolizing device in combination with V79 Chinese hamster cells as a mutational indicator system. The capacity for metabolic activation of benzo[a]pyrene (B[a]P), its 7,8-diol and 2-aminoanthracene by PAM was investigated. Because of the high variation between different PAM preparations, a statistically significant effect of the 3 compounds could only be demonstrated in a series of 4 or 5 experiments. When the ability of PAM to metabolize B[a]P and the 7,8-diol to mutagenic products was compared with that of primary embryonic fibroblasts from Syrian hamsters, PAM were found to be one-tenth as efficient. Experiments were performed to find out how the phagocytic process could affect the metabolic activation of polycyclic aromatic hydrocarbons. The results showed that PAM-mediated mutagenesis of the 7,8-diol was enhanced 5-10-fold if PAM were fed with opsonized particles. The mechanism by which the phagocytosis of PAM enhanced the mutagenicity of 7,8-diol, as detected in co-cultivated V79 cells, can so far only be a matter for speculation.
mesh_terms: D000818:Animals; D000873:Anthracenes / Q000378:metabolism; D001564:Benzo(a)pyrene; D001580:Benzopyrenes / Q000378:metabolism; D001711:Biotransformation; D002460:Cell Line; D006224:Cricetinae; D003412:Cricetulus; D004101:Dihydroxydihydrobenzopyrenes; D008168:Lung; D008264:Macrophages / Q000378:metabolism*; D009152:Mutagenicity Tests; D009153:Mutagens / Q000378:metabolism* / Q000633:toxicity; D009154:Mutation; D011817:Rabbits
chemical_list: D000873:Anthracenes; D001580:Benzopyrenes; D004101:Dihydroxydihydrobenzopyrenes; D009153:Mutagens; C017228:benzo(a)pyrene 7,8-dihydrodiol; D001564:Benzo(a)pyrene; C006593:2-anthramine