Journal
AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE
Volume 183, Issue 1, Pages 43-49Publisher
AMER THORACIC SOC
DOI: 10.1164/rccm.201004-0541OC
Keywords
emphysema; chronic obstructive pulmonary disease; BICD1; single-nucleotide polymorphism
Categories
Funding
- GlaxoSmithKline [RES11080]
- ECLIPSE Study [NCT00292552, SCO104960]
- National Heart, Lung, and Blood Institute [N01HR76101-N01HR76116, N01HR76118, N01HR76119]
- Centers for Medicare and Medicaid Services
- Agency for Healthcare Research and Quality
- U.S. National Institutes of Health [K12HL089990, R01HL075478, R01HL084323, P01HL083069]
- Medical Research Council [G0500306] Funding Source: researchfish
- DIVISION OF LUNG DISEASES [N01HR076116, N01HR076119, N01HR076101, N01HR076118] Funding Source: NIH RePORTER
- NATIONAL HEART, LUNG, AND BLOOD INSTITUTE [K12HL089990, R01HL075478, P01HL083069, K08HL097029, R01HL084323] Funding Source: NIH RePORTER
- MRC [G0500306] Funding Source: UKRI
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Rationale: Chronic obstructive pulmonary disease (COPD), characterized by airflow limitation, is a disorder with high phenotypic and genetic heterogeneity. Pulmonary emphysema is a major but variable component of COPD; familial data suggest that different components of COPD, such as emphysema, may be influenced by specific genetic factors. Objectives: To identify genetic determinants of emphysema assessed through high-resolution chest computed tomography in individuals with COPD. Methods: We performed a genome-wide association study (GWAS) of emphysema determined from chest computed tomography scans with a total of 2,380 individuals with COPD in three independent cohorts of white individuals from (1) a cohort from Bergen, Norway, (2) the Evaluation of COPD Longitudinally to Identify Predictive Surrogate Endpoints (ECLIPSE) Study, and (3) the National Emphysema Treatment Trial (NETT). We tested single-nucleotide polymorphism associations with the presence or absence of emphysema determined by radiologist assessment in two of the three cohorts and a quantitative emphysema trait (percentage of lung voxels less than -950 Hounsfield units) in all three cohorts. Measurements and Main Results. We identified association of a single-ucleotide polymorphism in BICD1 with the presence or absence of emphysema (P = 5.2 x 10(-7) with at least mild emphysema vs. control subjects; P = 4.8 x 10(-8) with moderate and more severe emphysema vs. control subjects). Conclusions: Our study suggests that genetic variants in BICD1 are associated with qualitative emphysema in COPD. Variants in BICD1 are associated with length of telomeres, which suggests that a mechanism linked to accelerated aging may be involved in the pathogenesis of emphysema. Clinical trial registered with www.clinicaltrials.gov (NCT00292552).
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