A genome-wide association study identifies risk loci for spirometric measures among smokers of European and African ancestry

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  • Sharon M Lutz
  • ,
  • Michael H Cho
  • ,
  • Kendra Young
  • ,
  • Craig P Hersh
  • ,
  • Peter J Castaldi
  • ,
  • Merry-Lynn McDonald
  • ,
  • Elizabeth Regan
  • ,
  • Manuel Mattheisen
  • Dawn L DeMeo
  • ,
  • Margaret Parker
  • ,
  • Marilyn Foreman
  • ,
  • Barry J Make
  • ,
  • Robert L Jensen
  • ,
  • Richard Casaburi
  • ,
  • David A Lomas
  • ,
  • Surya P Bhatt
  • ,
  • Per Bakke
  • ,
  • Amund Gulsvik
  • ,
  • James D Crapo
  • ,
  • Terri H Beaty
  • ,
  • Nan M Laird
  • ,
  • Christoph Lange
  • ,
  • John E Hokanson
  • ,
  • Edwin K Silverman
  • ,
  • ECLIPSE Investigators

BACKGROUND: Pulmonary function decline is a major contributor to morbidity and mortality among smokers. Post bronchodilator FEV1 and FEV1/FVC ratio are considered the standard assessment of airflow obstruction. We performed a genome-wide association study (GWAS) in 9919 current and former smokers in the COPDGene study (6659 non-Hispanic Whites [NHW] and 3260 African Americans [AA]) to identify associations with spirometric measures (post-bronchodilator FEV1 and FEV1/FVC). We also conducted meta-analysis of FEV1 and FEV1/FVC GWAS in the COPDGene, ECLIPSE, and GenKOLS cohorts (total n = 13,532).

RESULTS: Among NHW in the COPDGene cohort, both measures of pulmonary function were significantly associated with SNPs at the 15q25 locus [containing CHRNA3/5, AGPHD1, IREB2, CHRNB4] (lowest p-value = 2.17 × 10(-11)), and FEV1/FVC was associated with a genomic region on chromosome 4 [upstream of HHIP] (lowest p-value = 5.94 × 10(-10)); both regions have been previously associated with COPD. For the meta-analysis, in addition to confirming associations to the regions near CHRNA3/5 and HHIP, genome-wide significant associations were identified for FEV1 on chromosome 1 [TGFB2] (p-value = 8.99 × 10(-9)), 9 [DBH] (p-value = 9.69 × 10(-9)) and 19 [CYP2A6/7] (p-value = 3.49 × 10(-8)) and for FEV1/FVC on chromosome 1 [TGFB2] (p-value = 8.99 × 10(-9)), 4 [FAM13A] (p-value = 3.88 × 10(-12)), 11 [MMP3/12] (p-value = 3.29 × 10(-10)) and 14 [RIN3] (p-value = 5.64 × 10(-9)).

CONCLUSIONS: In a large genome-wide association study of lung function in smokers, we found genome-wide significant associations at several previously described loci with lung function or COPD. We additionally identified a novel genome-wide significant locus with FEV1 on chromosome 9 [DBH] in a meta-analysis of three study populations.

Original languageEnglish
JournalBMC Genetics
Volume16
Pages (from-to)138
ISSN1471-2156
DOIs
Publication statusPublished - 2015

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