Effect of 6p21 region on lung function is modified by smoking: a genome-wide interaction study

초록

Smoking is a major risk factor for chronic obstructive pulmonary disease (COPD); however, more than 25% of COPD patients are non-smokers, and gene-by-smoking interactions are expected to affect COPD onset. We aimed to identify the common genetic variants interacting with pack-years of smoking on FEV1/FVC ratios in individuals with normal lung function. A genome-wide interaction study (GWIS) on FEV1/FVC was performed for individuals with FEV1/FVC ratio >= 70 in the Korea Associated Resource cohort data, and significant SNPs were validated using data from two other Korean cohorts. The GWIS revealed that rs10947231 and rs8192575 met genome-wide significant levels; For H0:beta SNP=beta SNPpack-years=0mml:mspace width="0.333333em"mml:mspace vs H1:notH0, the likelihood ratio (LR) test was conducted, and its P values, P-LR, for rs10947231 and rs8192575 were 2.23x10(-12) and 1.18x10(-8), respectively. Interaction between rs8192575 and smoking is significantly replicated with two additional data (P-INT=0.0454, 0.0131). Expression quantitative trait loci, topologically associated domains, and PrediXcan analyses revealed that rs8192575 is significantly associated with AGER expression. SNPs on the 6p21 region are associated with FEV1/FVC, and the effect of smoking on FEV1/FVC differs among the associated genotypes.

키워드