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    Association between lung cancer risk and single nucleotide polymorphisms in the first intron and codon 178 of the DNA repair gene, O6-alkylguanine-DNA alkyltransferase.

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    Authors
    Crosbie, Philip A J
    McGown, Gail
    Thorncroft, Mary R
    O'Donnell, Paul
    Barber, Philip V
    Lewis, Sarah J
    Harrison, Kathryn L
    Agius, Raymond M
    Santibanez-Koref, Mauro F
    Margison, Geoffrey P
    Povey, Andrew C
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    Affiliation
    Cancer Research UK Carcinogenesis Group, Paterson Institute for Cancer Research, Christie Hospital NHS Trust, Manchester, United Kingdom.
    Issue Date
    2008-02-15
    
    Metadata
    Show full item record
    Abstract
    The association between lung cancer risk and 2 polymorphisms, rs12268840 and rs2308327 (codon K178R), in the DNA repair protein, O(6)-alkylguanine-DNA alkyltransferase, which are associated with interindividual differences in activity, have been investigated in 3 hospital-based case-control studies. Genotyping was carried out on 617 subjects of whom 255 had lung cancer. In 2 of the 3 series, there was a significant inverse association between the 178R allele and case status (p < 0.05). In a meta-analysis, the odds ratio (95% CI) associated with the 178R allele relative to the 178K allele was 0.64 (0.45-0.92, p = 0.01) and 0.51 (0.24-1.11, p = 0.09) in fixed effects and random effects models, respectively. In a pooled analysis, after adjustment for sex, age, pack years and series, the OR (95% CI) for a heterozygote was 0.67 (0.45-1.01) and for a 178R homozygote was 0.10 (0.01-0.94); the trend for a decreased risk with the number of R alleles was significant (p = 0.008). This trend was particularly pronounced in heavy smokers (trend test p = 0.003), but not significant in light smokers (p = 0.73). There was no evidence of an association between rs12268840 and lung cancer risk. These results suggest that the R allele may protect against lung cancer, specifically in heavy smokers, an effect that may result from this polymorphism affecting the function of the MGMT protein and/or levels in MGMT activity.
    Citation
    Association between lung cancer risk and single nucleotide polymorphisms in the first intron and codon 178 of the DNA repair gene, O6-alkylguanine-DNA alkyltransferase. 2008, 122 (4):791-5 Int. J. Cancer
    Journal
    International Journal of Cancer
    URI
    http://hdl.handle.net/10541/55036
    DOI
    10.1002/ijc.23059
    PubMed ID
    17957803
    Type
    Article
    Language
    en
    ISSN
    1097-0215
    ae974a485f413a2113503eed53cd6c53
    10.1002/ijc.23059
    Scopus Count
    Collections
    All Paterson Institute for Cancer Research
    Carcinogenesis Group

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