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• W4253485272 abstract "Sixty-three male cigarette smokers were entered into a cross-sectional study to determine whether inverse associations existed between polycyclic aromatic hydrocarbon (PAH)-DNA adduct levels and intake/serum levels of vitamin A, vitamin C and vitamin E. Associations between PAH-DNA adducts and intakes of carotene as well as serum levels of (β-carotene were also determined. Fasting blood samples were collected for assays of PAH-DNA adducts in circulating mononuclear cells, plasma cotinine and serum levels of vitamin A, β-carotene, vitamin C and vitamin E. Since genetic deficiency in the detoxifying enzyme glutathione S-transferase M1 (GSTM1) has been associated with increased risk of lung cancer, GSTM1 genotype was also determined. Analysis of PAH-DNA adducts by competitive enzyme-linked immunosorbent assay (ELISA) indicated that 70% of the subjects had detectable adducts with a mean of 4.38 adducts/108 nucleotides (range 1.00-24.1/108). Pearson’s method was utilized to determine whether any associations existed between the various host variables and PAH-DNA adducts. Previously, no significant associations were found between PAH-DNA adducts and cigarettes smoked/day, pack-years, daily/lifetime tar exposures or plasma cotinine levels [Carcinogenesis 13:2041,1992]. PAH-DNA adducts were inversely associated with serum cholesterol-adjusted vitamin E levels (r=-0.25, p≤0.05) and with smoking-adjusted vitamin C serum levels (r=-0.22, p<_0.09). Stratification by GSTM1 genotype indicated that these associations were limited to subjects with the null genotype. The relationship between adducts and serum cholesterol-adjusted vitamin E was significant in those of the null genotype (r=-0.38, p≤0.04) but not in those with the gene present (r=-0.12, p=0.5). Similarly, for smoking-adjusted vitamin C, the relationship with adducts was stronger in subjects with the null genotype (r=-0.35, p≤0.06) than in those with GSTM1 present (r=-0.05, p=0.77). These results are consistent with findings of prior epidemiological studies identifying significant inverse associations between antioxidant micronutrient status or GSTM1 genotype and the incidence of lung cancer. Additional studies should be conducted to confirm a possible protective role for vitamin E in PAH-DNA adduct formation and to explore further the possible roles of vitamin A, ß-carotene and vitamin C in modulating adduct formation and lung cancer risk." @default.
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• W4253485272 date "1995-01-01" @default.
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• W4253485272 title "Polycyclic Aromatic Hydrocarbon-DNA Adducts in Smokers and Their Relationship to Micronutrient Levels and Glutathione-S-Transferase M1 Genotype" @default.
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• W4253485272 doi "https://doi.org/10.1007/978-1-4612-0237-0_12" @default.
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