One hundred and eleven COPD subjects, whose post-bronchodilator FEV1/FVC values were less than 0.7, and who had histories of smoking exceeding 10 pack-years, were prospectively recruited from pulmonology clinics of 11 hospitals in Seoul, Korea. The degrees of involvement of airway and parenchyma were evaluated by volumetric computed tomography (CT) scans. In-house software automatically calculated luminal areas, airway wall areas, percentages of wall areas in segmental bronchi, emphysema indices, and mean lung densities in the whole lung parenchyma. The ADRB2 genotypes at codon 16 were determined for all patients.
Gly16 was associated with lumen diameter, luminal area, and percentage of wall area in patients with COPD (p = 0.02), whereas neither wall area nor wall thickness differed with ADRB2 genotype. Neither emphysema index nor mean lung density was associated with ADRB2 genotype.
Gly16 variant in ADRB2 gene was associated with airway wall phenotypes measured using CT scanning in COPD patients.