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IgE binding proteins in honey: discussion on their origin
F de la Torre1, J C García, A Martínez
1Unidad de Alergia, Hospital Nuestra. Sra. de Candelaria, Tenerife, Spain.
Summary
Three patients showed honey allergy despite negative tests for common pollen and bee allergens. This suggests other sources, like nectar, may cause honey sensitization.
Area of Science:
- Immunology
- Allergology
- Food Science
Background:
- Honey sensitization is typically attributed to pollen proteins (e.g., Compositae) and Hymenoptera insect glandular enzymes.
- Previous research has identified these components as the primary triggers for allergic reactions to honey.
Purpose of the Study:
- To investigate the cause of honey sensitization in patients who tested negative for known honey allergens.
- To identify potential novel protein allergens responsible for honey allergy.
Main Methods:
- Analyzed three patients with clinical honey sensitization, positive skin tests, and specific IgE to crude honey extract.
- Utilized SDS-PAGE immunoblotting to separate honey extract proteins and detect IgE binding bands.
- Attempted to identify allergens by comparing IgE binding bands with known honey allergens.
Main Results:
- Patients exhibited IgE binding to honey extract proteins at specific molecular weights (54, 46, 17, and 16 kDa).
- These IgE binding bands did not correspond to common pollen or bee-derived allergens.
- The specific allergens responsible for sensitization in these cases remained unidentified.
Conclusions:
- Identified a distinct pattern of honey sensitization not explained by currently known allergens.
- Suggests that non-bee-derived components, such as nectar proteins, may be implicated in honey allergy.
- Highlights the need for further research into the diverse protein sources within honey that can elicit allergic responses.