Abstract
Pulmonary function is a heritable trait, and recent genome-wide association studies (GWASs) have identified a number of loci influencing the trait. Genome-wide Complex Trait Analysis (GCTA) is a novel method provided by a software package that estimates the total additive genetic influence caused by common single nucleotide polymorphisms (SNPs) on whole-genome arrays. We conducted a GWAS and assessed the heritability of pulmonary function in an adult Japanese population using this approach. We initially conducted a GWAS on %forced vital capacity (FVC), %forced expiratory volume (FEV1) and FEV1/FVC in healthy Japanese adults (N=967). We then examined the heritability of these traits using GCTA with a total of 480,026 SNPs. We also estimated the genetic impact of the 24 genes identified as susceptibility genes to FEV1/FVC in six previous GWASs on the heritability of FEV1/FVC in the Japanese population. The heritabilities for %FVC, %FEV1, and FEV1/FVC were 71.2%, 51.9% and 41.6%, respectively. These results corresponded to previous heritability estimates for pulmonary function obtained by GCTA or by twin studies. The 24 previously reported pulmonary function genes accounted for 4.3-12.0% of the entire estimated heritability of FEV...Continue Reading
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