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- Title
Immunotherapy with a Recombinant Hybrid Molecule Alleviates Allergic Responses More Efficiently than an Allergenic Cocktail or Pollen Extract in a Model of Chenopodium album Allergy.
- Authors
Nouri, Hamid Reza; Sankian, Mojtaba; afsharzadeh, Danial; Varasteh, abdolreza
- Abstract
Background: The aim of this study is to assess the therapeutic potential of a recombinant hybrid molecule (rHM) alongside an allergenic cocktail from recombinant wild-type allergens as well as pollen extract on Chenopodium album allergy, using a BALB/c mouse model. Methods: The BALB/c mice had already been sensitized to C. album via intraperitoneal injections of alum-adsorbed allergenic cocktail and immunotherapy procedure was followed by subcutaneous injections of the rHM, allergenic cocktail and pollen extract at weekly intervals. Humoral immune responses were determined via measurement of specific antibodies in serum. Splenocytes of immunized mice were stimulated in vitro and then proliferation responses, cytokine secretion and mRNA expression of genes involved in immunotherapy were examined by ELISA and real-time PCR. Results: Sensitized mice were identified with high specific IgE against allergenic cocktail when compared with healthy mice. Immunotherapy with the rHM induced the highest ratio of the IgG2a/IgG1 levels compared to allergenic cocktail or C. album pollen extract. The rHM was able to induce proliferative responses as well as the allergenic cocktail in cultured splenocytes. Immunotherapy with the rHM significantly improved secretion of IFN-γ and IL-10, while secretion of IL-13 rapidly diminished. Interestingly, mRNA expression of GATA3 was strongly decreased in rHM-treated mice whereas mRNA expression of T-bet and Foxp3 was significantly increased. Conclusion: Our results prove that immunotherapy with the rHM effectively controlled allergic responses by shifting from a Th2-like immune response to a Th1-dominated immune response. Copyright © 2013 S. Karger AG, Basel
- Subjects
ALLERGIES; IMMUNOTHERAPY; POLLEN extract; CHENOPODIUM album; ALLERGENS
- Publication
International Archives of Allergy & Immunology, 2013, Vol 161, Issue 4, p325
- ISSN
1018-2438
- Publication type
Article
- DOI
10.1159/000347136