Filaggrin null mutations are associated with increased asthma exacerbations in children and young adults

Basu, K, Palmer, C.N.A., Lipworth, B.J., Irwin, W.H., Terron-Kwiatkowski, A., Zhao, Y., Liao, H., Smith, F.J.D., Mitra, A. and Mukhopadhyay, S. (2008) Filaggrin null mutations are associated with increased asthma exacerbations in children and young adults. Allergy, 63 (9). pp. 1211-1217. ISSN 0105-4538

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Abstract

Background: Filaggrin (FLG) null mutations are important genetic predisposing factors for atopic asthma and have recently been shown to influence controller and reliever medication needs in asthmatic children. Our objective was to study the role of FLG null alleles in asthma exacerbations. Methods: FLG mutations R501X and 2282del4 were assayed in 1135 individuals ranging from 3 to 22 years old with asthma from Tayside and Dumfries, Scotland. Asthma exacerbations over the previous 6 months were also studied. Results: The FLG mutations were significantly associated with greater risk of exacerbations in children with asthma. Exacerbations were significant for the R501X but not the 2282del4 mutation and the combined genotype compared to the wild-type with odds ratios of 1.97 (95% CI, 1.19–3.22; P = 0.009) and 1.61 (95% CI, 1.08–2.40; P = 0.021), respectively. Individuals with FLG null alleles were more likely to require oral steroids (31.4%vs 19.5%; OR = 1.89; P = 0.021) for their exacerbations. There was also a 1.71-fold increased risk (42.6%vs 30%; P = 0.041) of school absence owing to asthma exacerbations in asthmatic individuals with FLG null mutation. On sub-group analysis, the effect of FLG mutations on asthma exacerbations is significant (P = 0.045) only for participants with relatively mild asthma controlled on inhaled steroids, with inhaled albuterol according to need. Conclusion: In addition to their effect on asthma medication requirements reported previously, there is an association between the presence of FLG null mutations and the risk of asthma exacerbations in asthmatic children and young adults

Item Type: Article
Keywords: asthma exacerbation; child; filaggrin null mutation; oral steroid; school absence
Schools and Departments: Brighton and Sussex Medical School > Clinical Medicine
Subjects: R Medicine > RJ Pediatrics > RJ0047.3 Genetic aspects
Depositing User: Judy Keogh
Date Deposited: 26 Jul 2010
Last Modified: 11 Mar 2017 00:22
URI: http://sro.sussex.ac.uk/id/eprint/2445
Google Scholar:24 Citations

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