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Lipocalin allergen Bos d 2 is a weak immunogen
Soili Saarelainen1, Thomas Zeiler, Jaakko Rautiainen
1Department of Clinical Microbiology, University of Kuopio, 70211 Kuopio, Finland.
International Immunology
|April 6, 2002
Summary
The animal allergen Bos d 2 weakly stimulates immune responses in mice, similar to human reactions. This suggests its low immunogenicity may contribute to its allergenicity.
Area of Science:
- Immunology
- Allergen research
- Animal models
Background:
- Lipocalins are a significant group of animal-derived allergens with poorly understood immunological characteristics.
- Bos d 2, a lipocalin allergen, requires further investigation into its immune response.
- Understanding the immune response to Bos d 2 is crucial for allergy research.
Purpose of the Study:
- To investigate the immunological characteristics of the lipocalin allergen Bos d 2.
- To compare the immune response to Bos d 2 across different mouse strains.
- To elucidate the nature of the immune response, including humoral, cellular, and epitope recognition.
Main Methods:
- Immunization of various mouse strains with Bos d 2.
- Assessment of humoral and cellular immune responses (spleen cell proliferation).
- IgG subclass analysis, cytokine production measurement (IL-4), and epitope mapping.
Main Results:
- Only BALB/c mice showed a distinct humoral response to Bos d 2; cellular responses were weak in all strains.
- Bos d 2 induced weaker responses than control antigens (hen egg lysozyme, tetanus toxoid).
- Bos d 2 favored a T(h)2 response and induced IL-4 production, with BALB/c mice recognizing a human-similar immunodominant epitope.
Conclusions:
- The murine immune response to Bos d 2 mirrors human responses.
- Bos d 2 exhibits weak immunogenicity, potentially linked to its allergenicity.
- Further research is needed on epitope-specific immune responses to Bos d 2.