Abstract
Background
Spirometric measurements of pulmonary function are important in diagnosing and determining the severity of chronic obstructive pulmonary disease (COPD). We performed this study to determine whether candidate genes identified in genome-wide association studies of spirometric measurements were associated with COPD and if they interacted with smoking intensity.
Methods
The current analysis included 1,000 COPD subjects and 1,000 controls recruited from 24 hospital-based pulmonary clinics. Thirteen SNPs, chosen based on genome-wide association studies of spirometric measurements in the Korean population cohorts, were genotyped. Genetic association tests were performed, adjusting for age, sex, and smoking intensity, using models including a SNP-by-smoking interaction term.
Results
PID1 and FAM13A were significantly associated with COPD susceptibility. There were also significant interactions between SNPs in ACN9 and FAM13A and smoking pack-years, and an association of ACN9 with COPD in the lowest smoking tertile. The risk allele of FAM13A was associated with increased expression of FAM13A in the lung.
Conclusions
We have validated associations of FAM13A and PID1 with COPD. ACN9 showed significant interaction with smoking and is a potential candidate gene for COPD. Significant associations of genetic variants of FAM13A with gene expression levels suggest that the associated loci may act as genetic regulatory elements for FAM13A gene expression.
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Acknowledgments
This study was supported by the National Project for Personalized Genomic Medicine (A111218-11-GM02) and a grant from the Korean Health 21 R&D Project, Ministry of Health and Welfare, Republic of Korea (A102065). DNA samples were generously provided by the Kangwon National University Hospital Biobank, which is part of the National Biobank of Korea, supported by the Ministry of Health and Welfare, Republic of Korea. For the recruitment of COPD participants and also for the collection of data and samples, we thank all members of the Korean Obstructive Lung Disease (KOLD) Study Group anrsd the ASAN Network: Ji-Hyun Lee, Eun Kyung Kim, Tae-Hyung Kim, Tae Rim Shin, Jin Hwa Lee, Seong Yong Lim, Sang Yeub Lee, Ho Il Yoon, Kwang Ha Yoo, Seung Soo Sheen, Joo Hun Park, Yong Bum Park, Changhwan Kim, Yong Il Hwang, Young Sam Kim, Ji Ye Jung, Yoonki Hong, Seung Won Ra, Joon Beom Seo, Sang Min Lee, In A Jeong, Chang Hoon Lee, Sei Won Lee, Jae Seung Lee, Jin Won Huh, Ji Yong Moon, HyeKyeong Park, Hye Yun Park, Jin Woo Kim, Chin Kook Rhee, Hyoung Kyu Yoon, Woo Jin Kim, Jong Deog Lee, Kang Hyeon Choi, Bock Hyun Jung, Joo Ock Na, Doh Hyung Kim, Hye Sook Choi, Kwang Ha Lee, Myung Jae Park, Sung Soon Lee, Yeon-Mok Oh, and Sang Do Lee.
Conflict of interest
SDL received payment for lecturing from Nycomed, Takeda, and Norvatis. YMO received payment for lecturing from MSD Korea, AstraZeneca Korea, Boehringer Ingelheim Korea, Norvatis, DongWha, Takeda, and GSK Korea. EKS received a consultant fee from GSK, AstraZeneca, and Merck and payment for lecturing from GSK, AstraZeneca, and Merck. The other authors have no conflicts of interest to disclose.
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Kim, W.J., Lim, M.N., Hong, Y. et al. Association of Lung Function Genes with Chronic Obstructive Pulmonary Disease. Lung 192, 473–480 (2014). https://doi.org/10.1007/s00408-014-9579-4
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DOI: https://doi.org/10.1007/s00408-014-9579-4