PMID: 11909757Mar 23, 2002Paper

The genotoxicity of priority polycyclic aromatic hydrocarbons in complex mixtures

Mutation Research
Paul A White

Abstract

Risk assessment of complex environmental samples suffers from difficulty in identifying toxic components, inadequacy of available toxicity data, and a paucity of knowledge about the behavior of geno(toxic) substances in complex mixtures. Lack of information about the behavior of toxic substances in complex mixtures is often avoided by assuming that the toxicity of a mixture is simply the sum of the expected effects from each mixture component, i.e. no synergistic or antagonistic interactions. Although this assumption is supported by research investigating non-genotoxic end-points, the literature describing the behavior of genotoxic substances in complex mixtures is sparse and, occasionally, contradictory. In this study, the results of polycyclic aromatic hydrocarbon (PAH) analyses on freshwater bivalves were used to prepare realistic mixtures containing up to 16 PAHs. The SOS genotoxicity of the mixtures and each component were then assessed in an effort to evaluate the additivity of PAH genotoxicity. At nominal PAH concentrations above 1 microg/ml, observed genotoxic responses were far lower than those predicted under the assumption of additivity. At nominal concentrations below 0.75 microg/ml, differences are smaller and occa...Continue Reading

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Citations

Oct 17, 2007·Analytical and Bioanalytical Chemistry·Steffen KeiterHenner Hollert
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