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Enhanced expression of CD2 antigen on lung T cells
E Yamaguchi1, N Okazaki, A Itoh
1First Department of Medicine, School of Medicine, Hokkaido University, Sapporo, Japan.
The American Review of Respiratory Disease
|April 1, 1991
Summary
CD2 molecule expression is elevated on lung T cells in various lung diseases, suggesting a role in T cell accumulation. This increased CD2 antigen on T cells may enhance their interaction within the lung environment.
Area of Science:
- Immunology
- Pulmonary Medicine
- Cell Biology
Background:
- CD2 molecules are crucial for T cell adhesion and alternative activation pathways.
- Understanding T cell behavior in the lung is vital for diagnosing and treating lung diseases.
Purpose of the Study:
- To investigate the role of CD2 molecules in the activation and accumulation of lung T cells.
- To evaluate CD2 antigen expression on lung and blood T cells across different patient groups.
Main Methods:
- Utilized monoclonal antibodies and flow cytometry to assess CD2 expression.
- Analyzed lung and blood lymphocytes from healthy subjects and patients with pulmonary sarcoidosis, interstitial pneumonia, farmer's lung disease, and Crohn's disease.
Main Results:
- Mean fluorescence intensity (MFI) of CD2 was significantly higher on lung T cells compared to blood T cells in all patient groups.
- Enhanced CD2 expression on lung T cells was primarily observed on CD4+ T cells in pulmonary sarcoidosis patients.
Conclusions:
- Increased CD2 expression on lung T cells may facilitate their communication and interaction within the pulmonary environment.
- This heightened CD2 expression could contribute to the local accumulation of T cells in the lung, potentially playing a role in lung pathologies.