%0 Journal Article %J Am J Respir Crit Care Med %D 2012 %T Genome-wide association studies identify CHRNA5/3 and HTR4 in the development of airflow obstruction. %A Wilk, Jemma B %A Shrine, Nick R G %A Loehr, Laura R %A Zhao, Jing Hua %A Manichaikul, Ani %A Lopez, Lorna M %A Smith, Albert Vernon %A Heckbert, Susan R %A Smolonska, Joanna %A Tang, Wenbo %A Loth, Daan W %A Curjuric, Ivan %A Hui, Jennie %A Cho, Michael H %A Latourelle, Jeanne C %A Henry, Amanda P %A Aldrich, Melinda %A Bakke, Per %A Beaty, Terri H %A Bentley, Amy R %A Borecki, Ingrid B %A Brusselle, Guy G %A Burkart, Kristin M %A Chen, Ting-Hsu %A Couper, David %A Crapo, James D %A Davies, Gail %A Dupuis, Josée %A Franceschini, Nora %A Gulsvik, Amund %A Hancock, Dana B %A Harris, Tamara B %A Hofman, Albert %A Imboden, Medea %A James, Alan L %A Khaw, Kay-Tee %A Lahousse, Lies %A Launer, Lenore J %A Litonjua, Augusto %A Liu, Yongmei %A Lohman, Kurt K %A Lomas, David A %A Lumley, Thomas %A Marciante, Kristin D %A McArdle, Wendy L %A Meibohm, Bernd %A Morrison, Alanna C %A Musk, Arthur W %A Myers, Richard H %A North, Kari E %A Postma, Dirkje S %A Psaty, Bruce M %A Rich, Stephen S %A Rivadeneira, Fernando %A Rochat, Thierry %A Rotter, Jerome I %A Soler Artigas, Maria %A Starr, John M %A Uitterlinden, André G %A Wareham, Nicholas J %A Wijmenga, Cisca %A Zanen, Pieter %A Province, Michael A %A Silverman, Edwin K %A Deary, Ian J %A Palmer, Lyle J %A Cassano, Patricia A %A Gudnason, Vilmundur %A Barr, R Graham %A Loos, Ruth J F %A Strachan, David P %A London, Stephanie J %A Boezen, H Marike %A Probst-Hensch, Nicole %A Gharib, Sina A %A Hall, Ian P %A O'Connor, George T %A Tobin, Martin D %A Stricker, Bruno H %K Aged %K Female %K Forced Expiratory Volume %K Genome-Wide Association Study %K Humans %K Male %K Middle Aged %K Nerve Tissue Proteins %K Polymorphism, Single Nucleotide %K Pulmonary Disease, Chronic Obstructive %K Receptors, Nicotinic %K Receptors, Serotonin, 5-HT4 %K Smoking %K Vital Capacity %X

RATIONALE: Genome-wide association studies (GWAS) have identified loci influencing lung function, but fewer genes influencing chronic obstructive pulmonary disease (COPD) are known.

OBJECTIVES: Perform meta-analyses of GWAS for airflow obstruction, a key pathophysiologic characteristic of COPD assessed by spirometry, in population-based cohorts examining all participants, ever smokers, never smokers, asthma-free participants, and more severe cases.

METHODS: Fifteen cohorts were studied for discovery (3,368 affected; 29,507 unaffected), and a population-based family study and a meta-analysis of case-control studies were used for replication and regional follow-up (3,837 cases; 4,479 control subjects). Airflow obstruction was defined as FEV(1) and its ratio to FVC (FEV(1)/FVC) both less than their respective lower limits of normal as determined by published reference equations.

MEASUREMENTS AND MAIN RESULTS: The discovery meta-analyses identified one region on chromosome 15q25.1 meeting genome-wide significance in ever smokers that includes AGPHD1, IREB2, and CHRNA5/CHRNA3 genes. The region was also modestly associated among never smokers. Gene expression studies confirmed the presence of CHRNA5/3 in lung, airway smooth muscle, and bronchial epithelial cells. A single-nucleotide polymorphism in HTR4, a gene previously related to FEV(1)/FVC, achieved genome-wide statistical significance in combined meta-analysis. Top single-nucleotide polymorphisms in ADAM19, RARB, PPAP2B, and ADAMTS19 were nominally replicated in the COPD meta-analysis.

CONCLUSIONS: These results suggest an important role for the CHRNA5/3 region as a genetic risk factor for airflow obstruction that may be independent of smoking and implicate the HTR4 gene in the etiology of airflow obstruction.

%B Am J Respir Crit Care Med %V 186 %P 622-32 %8 2012 Oct 01 %G eng %N 7 %1 http://www.ncbi.nlm.nih.gov/pubmed/22837378?dopt=Abstract %R 10.1164/rccm.201202-0366OC