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Adrenergic beta(2)-receptor genotype predisposes to exacerbations in steroid-treated asthmatic patients taking frequent albuterol or salmeterol

On-demand inhaled albuterol is commonly prescribed worldwide. We have shown that the Arg16 allele of the adrenergic beta(2)-receptor agonist gene (ADRB2) predisposes to exacerbations in young asthmatic patients taking regular salmeterol. We have now extended our previous population by 636 patients a...

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Published in:Journal of allergy and clinical immunology 2009-12, Vol.124 (6), p.1188-94.e3
Main Authors: Basu, Kaninika, Palmer, Colin N A, Tavendale, Roger, Lipworth, Brian J, Mukhopadhyay, Somnath
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container_title Journal of allergy and clinical immunology
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creator Basu, Kaninika
Palmer, Colin N A
Tavendale, Roger
Lipworth, Brian J
Mukhopadhyay, Somnath
description On-demand inhaled albuterol is commonly prescribed worldwide. We have shown that the Arg16 allele of the adrenergic beta(2)-receptor agonist gene (ADRB2) predisposes to exacerbations in young asthmatic patients taking regular salmeterol. We have now extended our previous population by 636 patients and explored the role of the Arg16 allele on asthma exacerbations in the context of the use of on-demand albuterol and regular salmeterol. Arg/Gly status at position 16 of ADRB2 was assessed in 1182 young asthmatic patients (age, 3-22 years) from Scotland. Asthma exacerbations, use of beta-agonists and other medications over the previous 6 months, and lung function were also studied. An increased risk of exacerbations per copy of he Arg16 allele was observed in asthmatic patients, regardless of treatment regimen (odds ratio [OR], 1.30; 95% CI, 1.09-1.55; P = .003). This appears to be largely due to exposure to beta(2)-agonists because the risk of exacerbations observed in patients with the Arg16 allele was only observed in those receiving daily inhaled long- or short-acting beta(2)-agonist treatment (OR, 1.64; 95% CI, 1.22-2.20; P = .001). In contrast, there was no genotypic risk for exacerbations in patients using inhaled beta(2)-agonists less than once a day (OR, 1.08; 95% CI, 0.85-1.36; P = .525). The Arg16 genotype-associated risk for exacerbations was significantly different in those exposed to beta(2)-agonists daily versus those that were not (test for interaction, P = .022). The Arg16 genotype of ADRB2 is associated with exacerbations in asthmatic children and young adults exposed daily to beta(2)-agonists, regardless of whether the exposure is to albuterol or long-acting agonists, such as salmeterol.
doi_str_mv 10.1016/j.jaci.2009.07.043
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We have shown that the Arg16 allele of the adrenergic beta(2)-receptor agonist gene (ADRB2) predisposes to exacerbations in young asthmatic patients taking regular salmeterol. We have now extended our previous population by 636 patients and explored the role of the Arg16 allele on asthma exacerbations in the context of the use of on-demand albuterol and regular salmeterol. Arg/Gly status at position 16 of ADRB2 was assessed in 1182 young asthmatic patients (age, 3-22 years) from Scotland. Asthma exacerbations, use of beta-agonists and other medications over the previous 6 months, and lung function were also studied. An increased risk of exacerbations per copy of he Arg16 allele was observed in asthmatic patients, regardless of treatment regimen (odds ratio [OR], 1.30; 95% CI, 1.09-1.55; P = .003). This appears to be largely due to exposure to beta(2)-agonists because the risk of exacerbations observed in patients with the Arg16 allele was only observed in those receiving daily inhaled long- or short-acting beta(2)-agonist treatment (OR, 1.64; 95% CI, 1.22-2.20; P = .001). In contrast, there was no genotypic risk for exacerbations in patients using inhaled beta(2)-agonists less than once a day (OR, 1.08; 95% CI, 0.85-1.36; P = .525). The Arg16 genotype-associated risk for exacerbations was significantly different in those exposed to beta(2)-agonists daily versus those that were not (test for interaction, P = .022). 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This appears to be largely due to exposure to beta(2)-agonists because the risk of exacerbations observed in patients with the Arg16 allele was only observed in those receiving daily inhaled long- or short-acting beta(2)-agonist treatment (OR, 1.64; 95% CI, 1.22-2.20; P = .001). In contrast, there was no genotypic risk for exacerbations in patients using inhaled beta(2)-agonists less than once a day (OR, 1.08; 95% CI, 0.85-1.36; P = .525). The Arg16 genotype-associated risk for exacerbations was significantly different in those exposed to beta(2)-agonists daily versus those that were not (test for interaction, P = .022). 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subjects Administration, Inhalation
Adolescent
Adrenergic beta-2 Receptor Agonists
Albuterol - administration & dosage
Albuterol - analogs & derivatives
Alleles
Asthma - drug therapy
Asthma - genetics
Asthma - immunology
Bronchodilator Agents - administration & dosage
Child
Child, Preschool
Disease Progression
Female
Humans
Male
Polymorphism, Genetic
Receptors, Adrenergic, beta-2 - genetics
Salmeterol Xinafoate
Young Adult
title Adrenergic beta(2)-receptor genotype predisposes to exacerbations in steroid-treated asthmatic patients taking frequent albuterol or salmeterol
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