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Immunoglobulin E-mediated hypersensitivity in food-producing animals
1Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, California, USA. ljgershwin@ucdavis.edu
The Veterinary Clinics of North America. Food Animal Practice
|November 6, 2001
Summary
Type I hypersensitivity in food animals involves allergic reactions to various substances. Advances in diagnostics and understanding IgE regulation are paving the way for genetic research into immune responses.
Area of Science:
- Veterinary Immunology
- Allergy and Hypersensitivity
- Molecular Diagnostics
Background:
- Type I hypersensitivity causes allergic reactions in food animals to inhalants, injectables, and parasites.
- Immunoglobulin E (IgE) plays a role in host defense against certain parasites.
- Recent advancements include understanding IgE structure and developing specific diagnostic tools.
Purpose of the Study:
- To review the advancements in understanding Type I hypersensitivity and IgE in food animals.
- To highlight the evolution of diagnostic methods for detecting antigen-specific IgE.
- To emphasize the importance of genetic factors in regulating IgE responses.
Main Methods:
- Elucidation of epsilon heavy chain sequences and expressed protein.
- Development of chimeric IgE antibodies and species-specific anti-IgE reagents.
- Application of Enzyme-Linked Immunosorbent Assay (ELISA) and Western blotting techniques.
Main Results:
- New diagnostic tools have improved the detection of antigen-specific IgE in animal serum.
- ELISA and Western blotting have superseded older methods like passive cutaneous anaphylaxis testing.
- The complex regulation of IgE response, including T helper cell type 2 cytokine involvement, is established.
Conclusions:
- Sophisticated diagnostic procedures have significantly advanced the study of IgE in food animals.
- Understanding the genetic basis of IgE regulation is the next critical area for research.
- Future research will focus on identifying genes controlling IgE responses for inherited disease insights.