Characterization of IgE antibody binding profiles of sera from patients with atopic dermatitis to allergens of the domestic mites Dermatophagoides pteronyssinus and Euroglyphus maynei, using enhanced chemiluminescent immunoblotting

Abstract

A rapid, sensitive, chemiluminescent immunoblotting method was used to identify IgE-binding components of Dermatophagoides pteronyssinus and Euroglyphus maynei that were recognized by sera of 16 D. pteronyssinus-sensitive patients with atopic dermatitis. Some 28 components (14-200 kD) were found in the D. pteronyssinus extract, and sera bound between 1 and 13 of them (mean 6.0). At least one of four components (97, 28, 24 and 14 kD) were bound by 14/16 sera. E. maynei had 25 components (14-227 kD), 13 in common with those of D. pteronyssinus by molecular size. Sera bound between 1 and 11 of them (mean 5.2) and 14/16 sera bound 1 of 38 kD (unique to E. maynei) and/or 1 of 175 kD. There were positive correlations between the number of D. pteronyssinus and E. maynei components bound and anti-D. pteronyssinus and E. maynei serum IgE values (p < 0.001 in both cases) and between the number of D. pteronyssinus and E. maynei components bound and total serum IgE values (p < 0.01 in both cases). These results demonstrate a very considerable diversity of IgE antibody responses to domestic mite allergens amongst patients with atopic dermatitis. Show more