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    Keywords: CANCER ; CELL ; human ; LUNG ; MODEL ; PATHWAY ; PATHWAYS ; lung cancer ; LUNG-CANCER ; SUPPORT ; SYSTEM ; SYSTEMS ; RISK ; RISKS ; SITE ; ENZYMES ; GENE ; GENES ; GENOME ; PATIENT ; DNA ; MARKER ; BIOLOGY ; cell cycle ; CELL-CYCLE ; CYCLE ; SEQUENCE ; ASSOCIATION ; POLYMORPHISMS ; SUSCEPTIBILITY ; VARIANTS ; HEALTH ; DNA-REPAIR ; REPAIR ; COMPONENT ; MARKERS ; DAMAGE ; HUMAN GENOME ; REGION ; REGIONS ; DNA-DAMAGE ; CANCER-PATIENTS ; CANCER PATIENTS ; CYCLE CONTROL ; MULTICENTER ; DNA repair ; O-6-ALKYLGUANINE-DNA ALKYLTRANSFERASE ; ONCOLOGY ; RE ; VARIANT ; CHECKPOINT ; biomarker ; INTERVAL ; ENZYME ; analysis ; DNA damage ; HAPLOTYPE ; USA ; odds ratio ; cancer research ; cell cycle checkpoints ; modeling ; cell cycle control ; block ; nonsmokers ; INTEGRITY
    Abstract: The DNA repair systems maintain the integrity of the human genome and cell cycle checkpoints are a critical component of the cellular response to DNA damage. We hypothesized that genetic variants in DNA repair and cell cycle control pathways will influence the predisposition to lung cancer, and studied 27 variants in 17 DNA repair enzymes and 10 variants in eight cell cycle control genes in 1,604 lung cancer patients and 2,053 controls. To improve the estimation of risks for specific variants, we applied a Bayesian approach in which we allowed the prior knowledge regarding the evolutionary biology and physicochemical properties of the variant to be incorporated into the hierarchical model. Based on the estimation from the hierarchical modeling, MGMT 143V or 178R, and CHEK2 157I had an odds ratio of lung cancer equal to 1.45 [95% confidence interval (95% CI), 1.05-2.00], 1.18 (95% CI, 1.01-1.40), and 1.58 (95% CI, 1.14-2.17). The association of CHEK2 1571 seems to be overestimated in the conventional analysis. Nevertheless, this association seems to be robust in the hierarchical modeling. None of the pathways seem to have a prominent effect. In general, our study supports the notion that sequence variation may explain at least some of the variation of inherited susceptibility. In particular, further investigation of OGG1, MGMT, and CHEK2 focusing on the genetic regions where the present markers are located or the haplotype blocks tightly linked with these markers might be warranted
    Type of Publication: Journal article published
    PubMed ID: 18086781
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