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LABUDA, Malgorzata; LABERGE, Sophie; BRIERE, Julie; BERUBE, Denis; BEAULIEU, Patrick; PASTINEN, Tomi; KRAJINOVIC, Maja
Mediators of Inflammation, 01/2011, Letnik: 2011, Številka: 2Journal Article
Short-acting b2-adrenergic receptor agonists are commonly used bronchodilators for symptom relief in asthmatics. The aim of this study was to test whether genetic variants in PDE4D gene, a key regulator of b2-adrenoceptor-induced cAMP turnover in airway smooth muscle cells, affect the response to short-acting b2-agonists. Bronchodilator responsiveness was assessed in 133 asthmatic children by % change in baseline forced expiratory volume in one second (FEV1) after administration of albuterol. The analyses were performed in patients with airway obstruction (FEV1/FVC ratio below 90%, n=93). FEV1 % change adjusted for baseline FEV1 values was significantly different between genotypes of rs1544791 G/A polymorphism (P=0.006) and −1345 C/T (rs1504982) promoter variation (P=0.03). The association remained significant with inclusion of age, sex, atopy, and controller medication into multivariate model (P=0.004 and P=0.02, resp.). Our work identifies new genetic variants implicated in modulation of asthma treatment, one of them (rs1544791) previously associated with asthma phenotype.
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