Different IgE recognition of mite allergen components in asthmatic and nonasthmatic children

Yvonne Resch,Sven Michel,Michael Kabesch,Christian Lupinek,Rudolf Valenta,Susanne Vrtala

doi:10.1016/j.jaci.2015.03.024

Yvonne Resch, Sven Michel + Show 4 more

Open Access

https://doi.org/10.1016/j.jaci.2015.03.024

Copy DOI

Abstract

BackgroundHouse dust mites (HDMs) represent one of the most important inducers of respiratory allergies worldwide.ObjectiveWe sought to investigate the IgE and IgG reactivity profiles to a comprehensive panel of HDM allergens in children with allergic asthma and to compare them with those of nonasthmatic atopic children.MethodsSera from clinically well-characterized asthmatic children with HDM allergy (n = 105), nonasthmatic children (n = 53), and nonatopic nonasthmatic children (n = 53) were analyzed for IgE and IgG reactivity to a panel of 7 HDM allergens (nDer p 1, rDer p 2, rDer p 5, rDer p 7, rDer p 10, rDer p 21, and rDer p 23) by means of allergen microarray technology.ResultsAsthmatic children with HDM allergy more frequently showed an IgE response to each of the HDM allergens and recognized more allergens than nonasthmatic children with HDM allergy. Furthermore, IgE levels to certain HDM allergens (nDer p 1, P = .002; rDer p 2, P = .007; rDer p 5, P = .031; and rDer p 23, P < .001) were significantly higher in asthmatic children than in children without asthma. By contrast, fewer asthmatic children showed IgG reactivity to HDM allergens than nonasthmatic children, but allergen-specific IgG levels were comparable.ConclusionThe IgE and IgG reactivity profiles to HDM allergens, as well as IgE levels to certain allergen components, differed considerably between children with and without asthmatic symptoms caused by HDM allergy. In fact, asthmatic children were characterized by an expanded IgE repertoire regarding the numbers of recognized allergen components and by increased specific IgE levels.

Highlights

House dust mites (HDMs) represent one of the most important inducers of respiratory allergies worldwide
We found that 149 (94.3%) of the 158 analyzed children with HDM allergy had IgE reactivity to at least one of the 7 spotted HDM allergens
In this study we used a panel of 7 microarrayed HDM allergens to study possible differences in IgE and IgG recognition in clinically well-defined children with HDM allergy with or without allergic asthma

Summary

Introduction

House dust mites (HDMs) represent one of the most important inducers of respiratory allergies worldwide. Objective: We sought to investigate the IgE and IgG reactivity profiles to a comprehensive panel of HDM allergens in children with allergic asthma and to compare them with those of nonasthmatic atopic children. Methods: Sera from clinically well-characterized asthmatic children with HDM allergy (n 5 105), nonasthmatic children (n 5 53), and nonatopic nonasthmatic children (n 5 53) were analyzed for IgE and IgG reactivity to a panel of 7 HDM allergens (nDer p 1, rDer p 2, rDer p 5, rDer p 7, rDer p 10, rDer p 21, and rDer p 23) by means of allergen microarray technology. IgE levels to certain HDM allergens (nDer p 1, P 5 .002; rDer p 2, P 5 .007; rDer p 5, P 5 .031; and rDer p 23, P < .001) were significantly higher in asthmatic children than in children without asthma. Fewer asthmatic children showed IgG reactivity to HDM allergens than nonasthmatic children, but allergenspecific IgG levels were comparable.

Objectives

Methods

Results

Conclusion