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Monitoring Ara h 1, 2 and 3-sIgE and sIgG4 antibodies in peanut allergic children receiving oral rush immunotherapy
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Respiratory Medicine and Allergology.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Women's and Children's Health, Pediatrics.
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2014 (English)In: Pediatric Allergy and Immunology, ISSN 0905-6157, E-ISSN 1399-3038, Vol. 25, no 4, 323-328 p.Article in journal (Refereed) Published
Abstract [en]

Background: The aim was to study the clinical efficacy and safety of rush oral immunotherapy (OIT) for severe peanut-allergic children and to measure the antibody responses. Methods: Eighteen Japanese children were enrolled after a positive double-blind, placebo-controlled food challenge (DBPCFC). The patients ingested peanuts up to 3-5 times a day every 30 min, increasing the dose by 20% every time. The goal dose was 3.5-7 g. IgE, IgG, and IgG4 antibody levels to peanut, and peanut allergen components were measured during up to 3 yr of maintenance treatment. Results: Two children dropped out due to side effects. Sixteen patients (14 boys and two girls, median: 9 yr range: 5-14 yr) achieved the goal dose after a median of 11 days (range: 4-19 days). Their median threshold dose at DBPCFC was 0.20 g (range: 0.015-1.0 g). All were sensitized to Ara h 2. Fourteen of them had a history of previous anaphylaxis. In total, 173 adverse events were observed during the treatment (27% of the total ingestions) of which 74 needed medications. The median IgE, IgG, and IgG4 antibody levels to peanut increased during rush OIT. The IgG4 levels were high during the whole maintenance phase. IgE and IgG4 antibodies to Ara h 2 dominated the serological response during the treatment. Conclusions: The present rush OIT protocol for children with severe peanut allergy was effective and relatively safe. A sustained Ara h 2-specific IgG4 antibody response characterized the treatment.

Place, publisher, year, edition, pages
2014. Vol. 25, no 4, 323-328 p.
Keyword [en]
peanut allergy, children, oral immunotherapy, IgE, IgG4, desensitization
National Category
Respiratory Medicine and Allergy Pediatrics
Identifiers
URN: urn:nbn:se:uu:diva-229310DOI: 10.1111/pai.12243ISI: 000338037100004OAI: oai:DiVA.org:uu-229310DiVA: diva2:736354
Available from: 2014-08-06 Created: 2014-08-05 Last updated: 2017-12-05Bibliographically approved

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Moverare, RobertBorres, Magnus P.

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