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Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

Published on: November 4, 2010

β2-adrenergic receptor polymorphisms, asthma and COPD: two large population-based studies.

M Thomsen¹, B G Nordestgaard, A A Sethi

¹Dept of Clinical Biochemistry, Herlev Hospital, Herlev, Denmark.

The European Respiratory Journal

|November 15, 2011

Summary

The ADRB2 Thr164Ile gene variant is linked to poorer lung function and a higher risk of chronic obstructive pulmonary disease (COPD). This finding is based on genetic analysis of over 60,000 individuals, highlighting a significant association in the general population.

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Last Updated: May 27, 2026

Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

Published on: November 4, 2010

Area of Science:

Genetics and Respiratory Medicine
Pharmacogenomics of Adrenergic Receptors

Background:

The beta-2 adrenergic receptor (ADRB2) plays a crucial role in regulating airway smooth muscle tone.
Genetic variations in the ADRB2 gene may influence lung function and susceptibility to respiratory diseases.

Purpose of the Study:

To investigate the association between three functional polymorphisms in the ADRB2 gene (Thr164Ile, Gly16Arg, and Gln27Glu) and lung function, asthma, and COPD.
Specifically, to examine the impact of the Thr164Ile polymorphism on lung function parameters and COPD risk.

Main Methods:

Genotyping of 8,971 individuals from the Copenhagen City Heart Study for three ADRB2 polymorphisms.
Validation genotyping of 53,777 individuals from the Copenhagen General Population Study for the Thr164Ile polymorphism.
Statistical analysis to assess the association between genotypes and lung function (FEV(1)% predicted, FEV(1)/FVC) and COPD prevalence.

Main Results:

The ADRB2 Thr164Ile genotype was significantly associated with reduced FEV(1)% predicted and FEV(1)/FVC in both study cohorts.
Heterozygotes for Thr164Ile showed a 3% and 2% reduction in FEV(1)% pred and FEV(1)/FVC, respectively, in the Copenhagen City Heart Study.
In the Copenhagen General Population Study, Thr164Ile homozygotes and heterozygotes exhibited reduced FEV(1)% pred and FEV(1)/FVC.
An increased odds ratio for COPD was observed in Thr164Ile heterozygotes (1.46) in the Copenhagen City Heart Study and in homozygotes (4.53) in the Copenhagen General Population Study.

Conclusions:

The ADRB2 Thr164Ile polymorphism is associated with diminished lung function.
This genetic variant is linked to an increased risk of developing chronic obstructive pulmonary disease (COPD) in the general population.
These findings underscore the role of ADRB2 genetic variations in respiratory health and disease susceptibility.