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• W2079931352 startingPage "269" @default.
• W2079931352 abstract "Little is known about the impact of genetic variation on the genetic damage induced by urban air pollution or environmental tobacco smoke (ETS) in exposed populations. The levels of bulky DNA adducts ( 32P-postlabelling, nuclease P1 enrichment) and chromosomal aberrations were measured in lymphocytes of 194 non-smoking students living in the city of Athens, and the rural region of Halkida, Greece. In these individuals personal exposure to PAH was also measured. Furthermore, genetic polymorphisms were examined in cytochromes P450 1A1, 1B1, in the GSTM1, GSTP1 and GSTT1 as well as in microsomal epoxy hydrolase (EPHX) genes. Subjects with the CYP1*2A mutant genotype also suffering significant ETS exposure tended to exhibit higher adduct levels and % aberrant cells. In contrast, CYP1B1 polymorphisms seemed to have an impact on the DNA adduct levels only among individual with negligible ETS exposure. Subjects carrying both the CYP1*2A mutant genotype and the GSTM1 null genotype tended to have higher DNA adduct levels. A similar effect was also observed with the combined CYP1A1*2A/GSTP1 (Ile/Val) and the CYP1A1*2A/mEH slow polymorphisms. In both cases, the effect was more pronounced among subjects with higher levels of ETS exposure. Stepwise restriction of the observations to subjects characterised by (a) GSTP1 mutant, (b) GSTM1 null, (c) mEH slow (His139His) genotypes and (d) ETS exposure resulted in a significant trend of increasing DNA adduct levels only among individuals with at least one CYP1A1*2A mutated allele, illustrating the importance and complexity of gene-exposure and gene-gene interactions in determining the level of genotoxic damage on an individual levels." @default.
• W2079931352 created "2016-06-24" @default.
• W2079931352 creator A5071637943 @default.
• W2079931352 date "2004-04-01" @default.
• W2079931352 modified "2023-10-06" @default.
• W2079931352 title "Impact of phase I or phase II enzyme polymorphisms on lymphocyte DNA adducts in subjects exposed to urban air pollution and environmental tobacco smoke" @default.
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• W2079931352 doi "https://doi.org/10.1016/j.toxlet.2003.12.038" @default.
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