Different Effects of TERT, TP63, and CYP2A6 Polymorphism on Individual Risk of Tobacco-Related Lung Cancer in Male Japanese Smokers


Recent genome-wide association studies have identified lung cancer susceptibility loci, such as chromosome 5p15 (telomerase reverse transcriptase, TERT and cleft lip and palate transmembrane protein 1-like, CLPTM1L), 15q25 (nicotinic cholinergic receptor α, CHRNA3-CHRNA5), and 3q28 (tumor protein p63, TP63). Replication study was performed to confirm the association of the recently-identified susceptible loci (i.e., TERT-CLPTM1L, CHRNA3-CHRNA5, and TP63) in a total of 1460 male Japanese smokers (885 lung cancer cases and 575 healthy control subjects), which were previously studied for a low odds ratio of impaired or deletion polymorphism in cytochrome P450 2A6 (CYP2A6) for lung cancer risk. The minor allele frequency (0.442) of rs2736100 on 5p15 (TERT) was significantly higher in lung cancer cases than that (0.395) of controls, with an odds ratio of 1.27 (95% CI of 1.07 - 1.50, p = 0.00504). A series of subgroup analyses revealed the significant associations of rs4488809 (TP63, odds ratio of 1.21, p = 0.0422) and rs2736100 (TERT, odds ratio of 1.47, p = 6.40 × 10–5) with the risk of lung adenocarcinoma. No significant association of CHRNA3-CHRNA5 and CLPTM1L was found in this population. The present results support replication of the association of TERT and TP63 loci with lung adenocarcinomas and suggest subtype-specific effects of these loci on higher risk of lung cancer in smokers. The CYP2A6 including copy number polymorphism, uninvestigated in large-scale genome-wide association studies, may influence lower risk to heavy tobacco use-related lung cancer.

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M. Shimizu, K. Kiyotani, H. Kunitoh, T. Kamataki and H. Yamazaki, "Different Effects of TERT, TP63, and CYP2A6 Polymorphism on Individual Risk of Tobacco-Related Lung Cancer in Male Japanese Smokers," Journal of Cancer Therapy, Vol. 2 No. 5, 2011, pp. 690-696. doi: 10.4236/jct.2011.25093.

Conflicts of Interest

The authors declare no conflicts of interest.


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