Abstract
An overview on the influence of metabolic and DNA repair polymorphisms on biological indicators of genotoxic risk in occupational, environmental, or lifestyle exposure is presented in this article. Indicators of genotoxic risk include biomarkers of internal dose (urinary concentration of the substance or its metabolites and urinary mutagenicity), biological effective dose (protein and DNA adducts), and indicators of early biological effects (chromosome aberrations, sister chromatid exchanges, micronuclei, COMET assay, HPRT mutants). Genetic polymorphisms include those involved in the activation and detoxification (i.e., P-450 cytochrome, acetyltransferase, glutathione transferase) of various classes of carcinogens and the newly discovered polymorphisms affecting DNA repair enzymes. Genetic polymorphisms are assessed for their importance in detecting the impact of genotype on biological indicators of genotoxic risk.
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