期刊
ALLERGY
卷 67, 期 2, 页码 242-247出版社
WILEY
DOI: 10.1111/j.1398-9995.2011.02754.x
关键词
flow cytometry; IgE antibody; molecular allergology; oral food challenge; peanut allergy
Background: Immunoglobulin E (IgE)-sensitization to peanut is common and can indicate an allergy. A positive test needs to be confirmed by a double-blind, placebo-controlled food challenge (DBPCFC), which is regarded as the gold standard. The aim of the study was to evaluate the basophil allergen threshold sensitivity (CD-sens) and antibodies to peanut allergen components in relation to DBPCFC in the diagnoses of peanut allergy in children. Methods: Thirty-eight children with suspected peanut allergy underwent a DBPCFC. CD-sens to peanut and Ara h 2 were analysed as well as IgE-antibody to peanut and some of its allergen components (Ara h 1, 2, 3, 8 and 9). Results: Twenty-five children had a positive DBPCFC, and 92% of these were positive in CD-sens to peanut and Ara h 2. Two children with a positive DBPCFC were classified as low-responders and were not further evaluated. Children positive in DBPCFC had higher CD-sens values to peanut (median 1.3; range 0.429, n = 21) compared with children negative in DBPCFC (median 0; range 00.5, n = 13) (P < 0.0001). A positive DBPCFC correspond with increased levels of IgE-antibody to Ara h 1, 2 and 3 compared with those with a negative challenge (P < 0.0001 for all). All children with a negative CD-sens were negative in DBPCFC. Conclusion: In this study, a negative CD-sens to peanut excluded peanut allergy. Both tests, CD-sens to peanut and immunoassay for IgE-antibody to the peanut components, appear to be safe, time saving and cost-effective complements to DBPCFC.
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