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T cell phenotype in allergic asthma and atopic dermatitis
Jan G Wohlfahrt1, Steffen Kunzmann, Günther Menz
1Swiss Institute of Allergy and Asthma Research (SIAF), Davos, Switzerland.
International Archives of Allergy and Immunology
|August 14, 2003
Summary
This study identifies key genes involved in allergic diseases by examining T cell gene expression. DNA arrays reveal upregulated factors in allergic patients, aiding diagnostic discrimination.
Area of Science:
- Immunology
- Molecular Biology
- Genetics
Background:
- T cells are crucial in immune regulation but their role in tissue remodeling is unclear.
- Investigating gene expression in T cells can illuminate the pathogenesis of allergic diseases.
Purpose of the Study:
- To investigate gene expression in T cells from allergic patients.
- To identify genes contributing to the pathogenesis of allergic diseases, such as allergic asthma and atopic dermatitis.
Main Methods:
- Analysis of cDNA from CD4+ T cells of allergic asthma (AA), atopic dermatitis (AD) patients, and healthy controls.
- Utilized Nylon membrane-based DNA arrays to examine gene expression.
- Focused on T cells with high Interleukin-4 (IL-4) or Interleukin-13 (IL-13) expression.
Main Results:
- Upregulation of gene families including TGF-beta, chemokines, and chemokine receptors.
- Enhanced expression of matrix metalloproteinases (MMPs) and their inhibitors.
- Increased levels of fibroblast growth factors, neurotrophic, and vasoactive factors in allergic patients compared to healthy donors.
Conclusions:
- Identified and confirmed genes relevant to allergic diseases.
- Demonstrated the utility of DNA array techniques for the diagnostic discrimination of allergic conditions.