Abstract:
BACKGROUND:Jackfruit allergy has been reported just once. It is unknown whether this food allergy is caused by direct sensitization or cross-sensitization to pollen allergens. OBJECTIVE:Establish whether jackfruit allergy is linked to birchpollen allergy. METHODS:Two jackfruit allergic patients and five patients with birchpollen-related apple allergy were recruited. Sensitization to pollen and plant foods was assessed by skin prick test (SPT), radio-allergosorbent test (RAST) and immunoblot. RAST analysis was performed for Bet v 1 and Mal d 1. Cross-reactivity was evaluated by RAST and immunoblot-inhibition. Biological activity of immunoglobulin E (IgE) was measured by basophil histamine release. Allergy to jackfruit was evaluated by double-blind placebo-controlled food challenge (DBPCFC) or open challenge (OC). RESULTS:In both patients DBPCFC confirmed the reported jackfruit allergy. SPT was 41 and 27 mm2 and specific IgE to jackfruit was 5.9 and 0.8 IU/ml, respectively. Immunoblot analysis revealed IgE reactivity at Mr of approximately 17 kDa. The Bet v 1-related nature of this allergen in jackfruit was demonstrated by RAST and immunoblot inhibition. To assess whether jackfruit allergy might be common in patients with combined birchpollen-fruit allergy, five such patients underwent an OC with jackfruit. All five had OA-like symptoms. CONCLUSIONS:Jackfruit allergy can be added to the list of birchpollen-related food allergies. Increased consumption of this fruit will result in a rise in allergic reactions.
journal_name
Allergyjournal_title
Allergyauthors
Bolhaar ST,Ree R,Bruijnzeel-Koomen CA,Knulst AC,Zuidmeer Ldoi
10.1111/j.1398-9995.2004.00544.xkeywords:
subject
Has Abstractpub_date
2004-11-01 00:00:00pages
1187-92issue
11eissn
0105-4538issn
1398-9995pii
ALL544journal_volume
59pub_type
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