Abstract
BACKGROUND: IgE cross-sensitization to major birch pollen allergen Bet v 1 and pathogenesis-related (PR10) plant food allergens is responsible for the pollen-food allergy syndrome.
METHODS: We designed a recombinant protein, AB-PreS, consisting of non-allergenic peptides derived from the IgE-binding sites of Bet v 1 and the cross-reactive apple allergen, Mal d 1, fused to the PreS domain of HBV surface protein as immunological carrier. AB-PreS was expressed in E. coli and purified by chromatography. The allergenic and inflammatory activity of AB-PreS was tested using basophils and PBMCs from birch pollen allergic patients. The ability of antibodies induced by immunization of rabbits with AB-PreS and birch pollen extract-based vaccines to inhibit allergic patients IgE binding to Bet v 1 and Mal d 1 was assessed by ELISA.
RESULTS: IgE-binding experiments and basophil activation test revealed the hypoallergenic nature of AB-PreS. AB-PreS induced lower T-cell activation and inflammatory cytokine production in cultured PBMCs from allergic patients. IgG antibodies induced by five injections with AB-PreS inhibited allergic patients' IgE binding to Bet v 1 and Mal d 1 better than did IgG induced by up to 30 injections of six licensed birch pollen allergen extract-based vaccines. Additionally, immunization with AB-PreS induced HBV-specific antibodies potentially protecting from infection with HBV.
CONCLUSION: The recombinant AB-PreS-based vaccine is hypoallergenic and superior over currently registered allergen extract-based vaccines regarding the induction of blocking antibodies to Bet v 1 and Mal d 1 in animals.
Original language | English |
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Pages (from-to) | 1001-1017 |
Number of pages | 17 |
Journal | Allergy: European Journal of Allergy and Clinical Immunology |
Volume | 79 |
Issue number | 4 |
Early online date | 19 Oct 2023 |
DOIs | |
Publication status | Published - Apr 2024 |
Keywords
- Allergens
- Rabbits
- Antigens, Plant
- Food Hypersensitivity/prevention & control
- Escherichia coli
- Humans
- Immunoglobulin G
- Immunoglobulin E
- Recombinant Fusion Proteins
- Animals
- Vaccines, Synthetic
- Plant Proteins
- Pollen
- Betula
- Malus