Association between bronchodilating response to short-acting β-agonist and non-synonymous single-nucleotide polymorphisms of β2-adrenoceptor gene
Article first published online: 14 SEP 2005
Clinical & Experimental Allergy
Volume 35, Issue 9, pages 1162–1167, September 2005
How to Cite
Cho, S.-H., Oh, S.-Y., Bahn, J.-W., Choi, J.-Y., Chang, Y.-S., Kim, Y.-K., Min, K.-U. and Kim, Y.-Y. (2005), Association between bronchodilating response to short-acting β-agonist and non-synonymous single-nucleotide polymorphisms of β2-adrenoceptor gene. Clinical & Experimental Allergy, 35: 1162–1167. doi: 10.1111/j.1365-2222.2005.02319.x
- Issue published online: 14 SEP 2005
- Article first published online: 14 SEP 2005
- Submitted 29 March 2004; revised 13 April 2005; accepted 4 July 2005
- non-synonymous single-nucleotide polymorphism
Background With β-agonists being the most widely used agents in the treatment of asthma, in vitro studies reported that β2-adrenergic receptor (ADRB2) polymorphisms are associated with agonist-promoted down-regulation.
Objective The present population-based study aimed to evaluate the association between bronchodilating response to inhaled short-acting β-agonist and two non-synonymous single-nucleotide polymorphisms (SNPs) of ADRB2 (ADRB2-16 and ADRB2-27).
Methods Two hundred and nine children with reduction in forced expiratory volume in 1 s of more than 20% on methacholine bronchial challenge underwent bronchodilating response testing 5 min after the inhalation of 200 μg of albuterol. Of these 209, 195 gave peripheral blood for genotyping of ADRB2 polymorphisms.
Results The bronchodilating response was significantly higher in subjects with the homozygous Arg16 than in those with the homozygous Gly16. It was further demonstrated that haplotype pairs of the homozygous Arg16Gln27 and of the heterozygous Arg16Gln27/Gly16Glu27 showed the highest bronchodilating responses, and the haplotype pairs of the homozygous Gly16Gln27 the lowest response. As a whole, the bronchodilating response was more positively associated with the combined quantity of Arg16 and Glu27 polymorphisms than with that of Arg16 alone.
Conclusion Non-synonymous SNPs of ADRB2 at codons 16 and 27 is significantly associated with bronchodilating response to inhaled short acting β-agonists.