Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2016 Aug:98:33-42.
doi: 10.1016/j.lungcan.2016.05.008. Epub 2016 May 13.

Genome-wide association study confirms lung cancer susceptibility loci on chromosomes 5p15 and 15q25 in an African-American population

Affiliations

Genome-wide association study confirms lung cancer susceptibility loci on chromosomes 5p15 and 15q25 in an African-American population

Krista A Zanetti et al. Lung Cancer. 2016 Aug.

Abstract

Objectives: Genome-wide association studies (GWAS) of lung cancer have identified regions of common genetic variation with lung cancer risk in Europeans who smoke and never-smoking Asian women. This study aimed to conduct a GWAS in African Americans, who have higher rates of lung cancer despite smoking fewer cigarettes per day when compared with Caucasians. This population provides a different genetic architecture based on underlying African ancestry allowing the identification of new regions and exploration of known regions for finer mapping.

Materials and methods: We genotyped 1,024,001 SNPs in 1737 cases and 3602 controls in stage 1, followed by a replication phase of 20 SNPs (p<1.51×10(-5)) in an independent set of 866 cases and 796 controls in stage 2.

Results and conclusion: In the combined analysis, we confirmed two loci to be associated with lung cancer that achieved the threshold of genome-wide significance: 15q25.1 marked by rs2036527 (p=1.3×10(-9); OR=1.32; 95% CI=1.20-1.44) near CHRNA5, and 5p15.33 marked by rs2853677 (p=2.8×10(-9); OR=1.28; 95% CI=1.18-1.39) near TERT. The association with rs2853677 is driven by the adenocarcinoma subtype of lung cancer (p=1.3×10(-8); OR=1.37; 95% CI=1.23-1.54). No SNPs reached genome-wide significance for either of the main effect models examining smoking - cigarettes per day and current or former smoker. Our study was powered to identify strong risk loci for lung cancer in African Americans; we confirmed results previously reported in African Americans and other populations for two loci near plausible candidate genes, CHRNA5 and TERT, on 15q25.1 and 5p15.33 respectively, are associated with lung cancer. Additional work is required to map and understand the biological underpinnings of the strong association of these loci with lung cancer risk in African Americans.

Keywords: African Americans; Genome-wide association study; Lung neoplasms; Receptors, Cholinergic; Smoking; Telomerase.

PubMed Disclaimer

Conflict of interest statement

Conflict of Interest Statement:

We wish to confirm that there are no known conflicts of interest associated with this publication and there has been no significant financial support for this work that could have influenced its outcome.

Figures

Fig. 1
Fig. 1
Regional plots of association results, recombination rates, and linkage disequilibrium for the (a) 15q25.1 marked by rs2036527; (b) 5p15.33 marked by rs2853677. Association results from a log-additive genetic model in −log10 P-values of the SNPs were shown according to their chromosomal positions (hg18) within 1Mb region centering around the index SNP. P values were based on the stage 1 only except for both rs2036527 and rs2853677 where the combined P values were shown. Linkage Disequilibrium (LD) r2 values were estimated on 1000 Genomes Project data June 2010 YRI population (hg18). The colors of the dots reflect the LD with the index SNP as shown in the legend box. The figures were generated using locusZoom (http://csg.sph.umich.edu/locuszoom/).
Fig. 1
Fig. 1
Regional plots of association results, recombination rates, and linkage disequilibrium for the (a) 15q25.1 marked by rs2036527; (b) 5p15.33 marked by rs2853677. Association results from a log-additive genetic model in −log10 P-values of the SNPs were shown according to their chromosomal positions (hg18) within 1Mb region centering around the index SNP. P values were based on the stage 1 only except for both rs2036527 and rs2853677 where the combined P values were shown. Linkage Disequilibrium (LD) r2 values were estimated on 1000 Genomes Project data June 2010 YRI population (hg18). The colors of the dots reflect the LD with the index SNP as shown in the legend box. The figures were generated using locusZoom (http://csg.sph.umich.edu/locuszoom/).

Similar articles

Cited by

References

    1. American Cancer Society; American Cancer Society, editor. Cancer Facts & Figures 2015. Atlanta: 2015.
    1. NCI Surveillance Research Program. Fast Stats: An interactive tool for access to SEER cancer statistics. 2013.
    1. Doll R, Hill AB. A study of the aetiology of carcinoma of the lung. Br Med J. 1952;2:1271–1286. - PMC - PubMed
    1. Doll R, Peto R. Cigarette smoking and bronchial carcinoma: dose and time relationships among regular smokers and lifelong non-smokers. J Epidemiol Community Health. 1978;32:303–313. - PMC - PubMed
    1. Spitz MR, Wu X, Wilkinson A, Wei Q. Cancer of the Lung. In: Scottenfeld D, Fraumeni JF Jr, editors. Cancer Epidemiology adn Prevention. New York, NY: Oxford Univ Press; 2006. pp. 638–658.

Publication types

MeSH terms

Grants and funding