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Double-strand break DNA repair genotype predictive of later mortality and cancer incidence in a cohort of non-smokers.
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2009 (English)In: DNA Repair, ISSN 1568-7864, Vol. 8, no 1, 60-71 p.Article in journal (Refereed) Published
Abstract [en]

We followed-up for mortality and cancer incidence 1088 healthy non-smokers from a population-based study, who were characterized for 22 variants in 16 genes involved in DNA repair pathways. Follow-up was 100% complete. The association between polymorphism and mortality or cancer incidence was analyzed using Cox Proportional Hazard regression models. Ninety-five subjects had died in a median follow-up time of 78 months (inter-quartile range 59-93 months). None of the genotypes was clearly associated with total mortality, except variants for two Double-Strand Break DNA repair genes, XRCC3 18067 C>T (rs#861539) and XRCC2 31479 G>A (rs#3218536). Adjusted hazard ratios were 2.25 (1.32-3.83) for the XRCC3 C/T genotype and 2.04 (1.00-4.13) for the T/T genotype (reference C/C), and 2.12 (1.14-3.97) for the XRCC2 G/A genotype (reference G/G). For total cancer mortality, the adjusted hazard ratios were 3.29 (1.23-7.82) for XRCC3 C/T, 2.84 (0.81-9.90) for XRCC3 T/T and 3.17 (1.21-8.30) for XRCC2 G/A. With combinations of three or more adverse alleles, the adjusted hazard ratio for all cause mortality was 17.29 (95% C.I. 8.13-36.74), and for all incident cancers the HR was 5.28 (95% C.I. 2.17-12.85). Observations from this prospective study suggest that polymorphisms of genes involved in the repair of DNA double-strand breaks significantly influence the risk of cancer and non-cancer disease, and can influence mortality.

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2009. Vol. 8, no 1, 60-71 p.
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URN: urn:nbn:se:umu:diva-19673DOI: 10.1016/j.dnarep.2008.08.012PubMedID: 18824251OAI: oai:DiVA.org:umu-19673DiVA: diva2:202287
Available from: 2009-03-09 Created: 2009-03-09 Last updated: 2010-01-13

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Jarvholm, Bengt

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