PMID: 7546226Sep 1, 1995Paper

The impact of glutathione s-transferase M1 and cytochrome P450 1A1 genotypes on white-blood-cell polycyclic aromatic hydrocarbon-DNA adduct levels in humans

Molecular Carcinogenesis
N RothmanP T Strickland

Abstract

Carcinogenic polycyclic aromatic hydrocarbons (PAHs) form DNA adducts via a complex metabolic activation pathway that includes cytochrome P450 (CYP) 1A1, whereas intermediate metabolites can be detoxified by conjugation through pathways including glutathione s-transferase M1 (GSTM1). PAH-DNA adducts can be measured in peripheral white blood cells (WBCs) and should reflect the net effect of competing activation and detoxification pathways and DNA repair as well as exposure. We have previously shown that WBC PAH-DNA adducts measured by an enzyme-linked immunosorbent assay (ELISA) were associated with recent, frequent consumption of charbroiled food among 47 nonsmoking wildland fire-fighters who provided two blood samples 8 wk apart. In the investigation reported here, which was performed in the same population, we measured the association between the GSTM1 null genotype, which results in loss of enzyme activity, and PAH-DNA adduct levels, hypothesizing that subjects with this genotype would have higher levels of DNA adducts because of their decreased ability to detoxify PAH metabolites. However, PAH-DNA adduct levels were nonsignificantly lower in subjects with the GSTM1 null genotype (n = 28) compared with other subjects (n = 19...Continue Reading

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Citations

Feb 26, 2010·Journal of Toxicology and Environmental Health. Part B, Critical Reviews·Gary GinsbergBabasaheb Sonawane
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