title: [Genotoxicity resulting from a complex mixture of environmental origin using 2 bacterial systems].
abstract: The genotoxicity of environmental complex mixtures was tested with Ames mutagenicity assay and with Bacillus subtilis rec assay for estimation of primary DNA damage. Soil samples obtained from an area contaminated with petrochemical wastes were sequentially extracted with ethyl ether and methanol. After evaporation to dryness the extracts were resuspended in dimethylsulfoxide for their use in biological tests. No mutagenic response was detected with the Ames test. Ether extract from parcel 1 showed an unusually high toxicity for Salmonella typhimurium TA100 and induced DNA damage in Bacillus subtilis with a clear relationship dose-genotoxic response. The analysis of the results obtained in both assays and the nature of the samples indicate that the genotoxicity detected in the complex mixture is compatible with the one caused by DNA intercalating compounds.
authors.affiliation: Cátedra de Higiene y Sanidad, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina.
authors.forename: L
authors.initials: L
authors.lastname: López
authors.forename: J
authors.initials: J
authors.lastname: Moretton
mesh_terms: D001412:Bacillus subtilis / Q000187:drug effects* / Q000235:genetics; D004249:DNA Damage; D004269:DNA, Bacterial / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D004986:Ether; D005798:Genes, Bacterial / Q000187:drug effects; D007220:Industrial Waste / Q000009:adverse effects* / Q000032:analysis; D007364:Intercalating Agents / Q000302:isolation & purification / Q000633:toxicity*; D000432:Methanol; D009152:Mutagenicity Tests; D012486:Salmonella typhimurium / Q000187:drug effects* / Q000235:genetics; D012989:Soil Pollutants / Q000302:isolation & purification / Q000633:toxicity*; D012997:Solvents; D013045:Species Specificity
chemical_list: D004269:DNA, Bacterial; D007220:Industrial Waste; D007364:Intercalating Agents; D012989:Soil Pollutants; D012997:Solvents; D004986:Ether; D000432:Methanol