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- W2020868986 abstract "<b><i>Background:</i></b> Diagnosis and immunotherapy of house-dust mite (HDM) allergy is still based on natural allergen extracts. The aim of this study was to analyze commercially available <i>Dermatophagoides pteronyssinus</i> extracts from different manufacturers regarding allergen composition and content and whether variations may affect their allergenic activity. <b><i>Methods:</i></b> Antibodies specific for several <i>D. pteronyssinus </i>allergens (Der p 1, 2, 5, 7, 10 and 21) were used to analyze extracts from 10 different manufacturers by immunoblotting. Sandwich ELISAs were used to quantify Der p 1 and Der p 2 in the extracts. Mite-allergic patients (n = 45) were skin-tested with the extracts and tested for immunoglobulin E (IgE) reactivity to a panel of 10 mite allergens (Der p 1, 2, 4, 5, 7, 8, 10, 14, 20 and 21) by dot blot. <b><i>Results:</i></b> Only Der p 1 and Der p 2 were detected in all extracts but their concentrations and ratios showed high variability (Der p 1: 6.0–40.8 µg ml<sup>–1</sup>; Der p 2: 1.7–45.0 µg ml<sup>–1</sup>). At least 1 out of 4 allergens (i.e. Der p 5, 7, 10 and 21) was not detected in 8 of the studied extracts. Mite-allergic subjects showed different IgE reactivity profiles to the individual mite allergens, the extracts showed different allergenic activity in skin-prick tests and false-negative results. <b><i>Conclusions:</i></b> Commercially available <i>D. pteronyssinus </i>extracts lack important allergens, show great variability regarding allergen composition and content and some gave false-negative diagnostic test results in certain patients." @default.
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- W2020868986 date "2012-01-01" @default.
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- W2020868986 title "Varying Allergen Composition and Content Affects the in vivo Allergenic Activity of Commercial <b><i>Dermatophagoides pteronyssinus</i></b> Extracts" @default.
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- W2020868986 doi "https://doi.org/10.1159/000337654" @default.
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