Genetic markers of bronchial asthma in children with atopic dermatitis

Abstract

The aim of the study was to evaluate the usefulness of the -703С/Т polymorphism in IL-5 gene, Q551R polymorphism in IL-4RA gene, and GSTM1 and GSTТ1 gene polymorphism as biological markers of bronchial asthma (BA) in children with atopic dermatitis (AD). We genotyped children with AD (n = 72; mean age, 9.4 ± 0.28 years), children with AD in combination with BA (n = 68; mean age, 7.5 ± 0.7 years) and control subjects (n = 147; mean age, 9.9 ± 0.42 years). We found the associations between BA and the -703С allele of the interleukin-5 (IL-5) gene (OR = 1.73, p = 0.013) and -703СС / 551RR genotype combination (OR = 3.15; p = 0.015) in children with AD; between the 551RR genotype of the IL-4RA gene and atopy (p < 0.05). -703CT / GSТТ1 0/0 genotype combination was found rarer in children with BA than in controls (OR = 0.15; p = 0.049). Thus, -703С/Т allele of the IL-5 gene and -703СС / 551RR genotype combination were associated with BA and could be used as valuable markers of the disease in children with AD, whereas the Q551R polymorphism in the IL-4RA gene was associated with predisposition to atopic disease and could be used for administration of preventive therapy of allergic disorder in early childhood. The -703CT / GSТТ1 0/0 genotype combination can prevent BA occurrence in children with AD.