Abstract
Panallergens show structural similarities, and they are responsible for many cross-reactions between pollen and plant food sources. The aim of the present study was to investigate IgE reactivity to peanut allergen components in children with birch pollen allergy. Patients experienced symptoms of allergic asthma, allergic rhinitis, and urticaria, and they underwent a complete diagnostic evaluation, including skin prick test (SPT), specific IgE (sIgE) to birch pollen allergen (t3), peanut allergen (f13). In addition, measurement of sIgE to the major birch allergen components, Betula verrucosa (Bet v1, Bet v2), and to peanut allergen components, Arachis hypogaea (genuine componens: Ara h1, Ara h2, Ara h3, and cross-reactive Ara h8) was performed, by using a microarray technique (component resolved diagnosis, CRD). SPT to birch extract was positive in all children, and SPT to peanut extract was positive in 51 % of them. sIgE to both allergens was increased in 39 % of children, 55 % of them had increased sIgE (t3), and one child had increased sIgE (f13). CRD results confirmed that some children were sensitized to Bet v1 only, and some children to genuine Ara h only. Bet v1/Ara h8 cross-reactivity was found in 16 % of children. Results of the present study reveal that SPT, sIgE, and CRD may detect sensitization and co-sensitization with birch and peanut allergens/allergen components, and CRD may help to differentiate sensitization to genuine peanut components from sensitization to peanut cross-reactive component in birch-sensitive children. Diagnostic approach has to be individualized for each patient.
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Baričić, T.V., Dodig, S. Birch pollen-associated peanut allergies in children. Aerobiologia 29, 85–93 (2013). https://doi.org/10.1007/s10453-012-9265-z
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DOI: https://doi.org/10.1007/s10453-012-9265-z