Interindividual variations in DNA adduct levels assessed by analysis of multiple genetic polymorphisms in smokers

Cancer Epidemiology, Biomarkers & Prevention : a Publication of the American Association for Cancer Research, Cosponsored by the American Society of Preventive Oncology
Hans B KetelslegersJ H van Delft

Abstract

Genetic polymorphisms in genes involved in processes that affect DNA damage may explain part of the large interindividual variation in DNA adduct levels in smokers. We investigated the effect of 19 polymorphisms in 12 genes involved in carcinogen metabolism, DNA repair, and oxidant metabolism on DNA adduct levels (determined by (32)P post-labeling) in lymphocytes of 63 healthy Caucasian smokers. The total number of alleles that were categorized as putatively high-risk alleles seemed associated with bulky DNA adduct levels (P = 0.001). Subsequently, to investigate which polymorphisms may have the highest contribution to DNA adduct levels in these smokers, discriminant analysis was done. In the investigated set of polymorphisms, GSTM1*0 (P < 0.001), mEH*2 (P = 0.001), and GPX1*1 (P < 0.001) in combination with the level of exposure (P < 0.001) were found to be key effectors. DNA adduct levels in subjects with a relatively high number of risk alleles of these three genes were >2-fold higher than in individuals not having these risk alleles. Noteworthy, all three genes are involved in deactivation of reactive carcinogenic metabolites. This study shows that analysis of multiple genetic polymorphisms may predict the interindividual v...Continue Reading

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Citations

Nov 3, 2009·The British Journal of Nutrition·Sabine A S LangieFrederik J van Schooten
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Aug 19, 2008·Cancer Epidemiology, Biomarkers & Prevention : a Publication of the American Association for Cancer Research, Cosponsored by the American Society of Preventive Oncology·Hans B KetelslegersJos C S Kleinjans

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