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Transcriptome‐wide association study reveals candidate causal genes for lung cancer

Yohan Bossé, Zhonglin Li, Jun Xia, Venkata Manem, Robert Carreras‐Torres, Aurélie Gabriel, Nathalie Gaudreault, Demetrius Albanes, Melinda C. Aldrich, Angeline Andrew, Susanne Arnold, Heike Bickeböller (+36 others)
2019 International Journal of Cancer  

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https://web.archive.org/web/20210717194329/https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/ijc.32771

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We have recently completed the largest GWAS on lung cancer including 29,266 cases and 56,450 controls of European descent. The goal of our study has been to integrate the complete GWAS results with a large-scale expression quantitative trait loci (eQTL) mapping study in human lung tissues (n = 1,038) to identify candidate causal genes for lung cancer. We performed transcriptome-wide association study (TWAS) for lung cancer overall, by histology (adenocarcinoma, squamous cell carcinoma and small
more » ... cell lung cancer) and smoking subgroups (never- and ever-smokers). We performed replication analysis using lung data from the Genotype-Tissue Expression (GTEx) project. DNA damage assays were performed in human lung fibroblasts for selected TWAS genes. As expected, the main TWAS signal for all histological subtypes and ever-smokers was on chromosome 15q25. The gene most strongly associated with lung cancer at this locus using the TWAS approach was IREB2 (pTWAS = 1.09E-99), where lower predicted expression increased lung cancer risk. A new lung adenocarcinoma susceptibility locus was revealed on 9p13.3 and associated with higher predicted expression of AQP3 (pTWAS = 3.72E-6). Among the 45 previously described lung cancer GWAS loci, we mapped candidate target gene for 17 of them. The association AQP3-adenocarcinoma on 9p13.3 was replicated using GTEx (pTWAS = 6.55E-5). Consistent with the effect of risk alleles on gene expression levels, IREB2 knockdown and AQP3 overproduction promote endogenous DNA damage. These findings indicate genes whose expression in lung tissue directly influences lung cancer risk.
doi:10.1002/ijc.32771 pmid:31696517 pmcid:PMC7008463 fatcat:ypawxwbm4naj5gca7yrrxvln3e
Citation

Yohan Bossé, Zhonglin Li, Jun Xia, Venkata Manem, Robert Carreras‐Torres, Aurélie Gabriel, Nathalie Gaudreault, Demetrius Albanes, Melinda C. Aldrich, Angeline Andrew, Susanne Arnold, Heike Bickeböller, Stig E. Bojesen, Paul Brennan, Hans Brunnstrom, Neil Caporaso, Chu Chen, David C. Christiani, John K. Field, Gary Goodman, Kjell Grankvist, Richard Houlston, Mattias Johansson, Mikael Johansson, Lambertus A. Kiemeney, Stephen Lam, Maria Teresa Landi, Philip Lazarus, Loic Le Marchand, Geoffrey Liu, Olle Melander, Gadi Rennert, Angela Risch, Susan M. Rosenberg, Matthew B. Schabath, Sanjay Shete, Zhuoyi Song, Victoria L. Stevens, Adonina Tardon, H‐Erich Wichmann, Penella Woll, Shan Zienolddiny, Ma'en Obeidat, Wim Timens, Rayjean J. Hung, Philippe Joubert, Christopher I. Amos, James D. McKay. "Transcriptome‐wide association study reveals candidate causal genes for lung cancer." International Journal of Cancer 146.7 (2019) 1862-1878