Journal
DNA AND CELL BIOLOGY
Volume 26, Issue 3, Pages 186-191Publisher
MARY ANN LIEBERT INC
DOI: 10.1089/dna.2006.9999
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DNA repair forms the most effective defense system against DNA damage. The XRCC1 gene product is implicated in single-strand and base-excision repair mechanisms. Our main aim was to investigate the relationship between the XRCC1 gene with lung cancer on the north-Indian population. Blood samples from 225 North-Indian subjects including 103 newly diagnosed cases and 122 population-based healthy persons were collected. XRCC1 genotypes were detected using a PCR-RFLP technique. The data were analyzed by logistic regression analysis. XRCC1 polymorphisms at codon 399 were found to be protective in the development of lung cancer (OR-0.6, 95% CI-0.46-0.80, p-0.0008). The codon 194 Trp/Trp genotype was associated with a slightly increased risk of lung cancer. When assessed in nonsmokers, only the Arg/Trp genotype of XRCC1 codon 194 was positively associated with lung cancer (OR-2.3, 95% CI-0.77-7.20). Smoking also seemed to significantly interact with the combined genotypes of XRCC1 codon 399 Arg/Gln/Gln/Gln. In conclusion, the results have suggested that the XRCC1 gene might be the risk genotype for lung cancer in this population.
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