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Analysis of Immunological Reactions to Foods in Birch Pollen-Allergic Patients

Analysis of Immunological Reactions to Pollen-Related Foods in Birch Pollen-Allergic Patients

Status
UNKNOWN
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT00787631
Enrollment
30
Registered
2008-11-07
Start date
2008-12-31
Completion date
2010-12-31
Last updated
2008-11-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Allergic Rhinitis, Food Allergy

Keywords

birch pollen pollen allergy, oral allergy syndrome to apple, cross reactivity, bet v 1, mal d 1

Brief summary

A high number of birch pollen-allergic individuals develop hypersensitivity reactions to certain foods, e.g. apples. This food allergy is due to immunological cross-reactivity. Birch pollen-related foods contain proteins, e.g. Mal d 1 in apple, that are structurally related with the major birch pollen allergen, Bet v 1. Hence IgE antibodies and T lymphocytes specific for Bet v 1 recognize these food proteins which results in activation of the immune system and, consequently, in clinical symptoms. In the present study the investigators intend to investigate if and how the consumption of birch pollen-related food allergens affects birch pollen allergy. In other words, the investigators are interested to analyse whether Bet v 1-related food allergens activate Bet v 1-specific memory cells and thus, contribute to the maintenance of the pollen allergy outside the pollen season. Data obtained in this study will help to clarify the immunological and clinical role of cross-reactivity between pollen and food allergies and will reveal whether avoidance of such foods should be recommended for the patients. Finally, novel approaches for diagnosis and therapy of pollen-related food allergens can be developed.

Interventions

None listed

Sponsors

Medical University of Vienna
Lead SponsorOTHER

Study design

Observational model
CASE_ONLY
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
18 Years to 50 Years
Healthy volunteers
No

Inclusion criteria

* Otherwise healthy birch pollen allergic (rhinoconjunctivitis)persons * Positive SPT and RAST to birch pollen * Sensitized to Bet v 1

Exclusion criteria

* Persons suffering from malignancies, autoimmune and cardiopulmonary diseases * Anemia * Hyper-IgE syndrome * Treatment with ß-blockers, permanent treatment with antihistaminics, leucotriene antagonists, corticosteroids

Contacts

Primary ContactTamar Kinaciyan, Ass.Prof.MD
tamar.kinaciyan@meduniwien.ac.at+43140400
Backup ContactBarbara Bohle, AssocProf Dr
barbara.bohle@meduniwien.ac.at+43140400

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026