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Evaluation of immunophenotype of lymphoid cells isolated from malignant pleural effusions
E Jezewska1, J Sikora, A Słowik-Gabryelska
1Department of Immunopathology, University Medical School, Poznań, Poland.
Insights
Lung cancer patients show distinct T lymphocyte changes in malignant pleural effusions. Specifically, CD4+ T cells decrease, while T cell receptor delta (TCR-1) expressing T cells increase in these effusions.
Area of Science:
- Immunology
- Oncology
- Cell Biology
Background:
- Malignant pleural effusions in lung cancer patients are complex microenvironments.
- Understanding immune cell populations within these effusions is crucial for diagnosis and treatment.
Purpose of the Study:
- To investigate the distinct immunological profiles of lymphoid cells in malignant pleural effusions compared to non-malignant effusions.
- To identify specific T lymphocyte subpopulations that differ between these effusion types.
Main Methods:
- Indirect immunofluorescence and monoclonal antibodies were used to analyze CD antigens on lymphoid cells.
- Flow cytometry was employed to quantify percentages of various immune cell populations.
Main Results:
- CD4+ T lymphocytes were significantly decreased in malignant effusions versus inflammatory effusions, particularly in squamous cell and anaplastic lung carcinomas.
- T cell receptor delta (TCR-1) expression on T lymphocytes was significantly higher in malignant effusions.
- No significant differences were observed in Natural Killer (NK) cells, monocyte/granulocyte series activated cells, or B lymphocytes.
Conclusions:
- T lymphocyte subpopulations exhibit distinct patterns in malignant versus non-malignant pleural effusions.
- These findings highlight specific T cell alterations associated with lung cancer in pleural effusions.
Abstract:
Lymphoid cells, isolated from malignant pleural effusions and collected from patients bearing primary lung carcinoma, were examined by means of indirect immunofluorescence and a panel of monoclonal antibodies vs several CD antigens. The percentages of CD4+ T lymphocytes were found to be significantly depressed in malignant effusions as compared to inflammatory ones. In relation to histological type of cancer it was especially evident in squamous cell and anaplastic carcinomas (small and large cell), in comparison to adenocarcinomas. Expression of T cell antigen receptor tau/delta (TCR-1) on T lymphocytes, demonstrated by BB3 MoAb (vs V delta 2), was significantly higher in malignant effusions as compared with non-malignant ones. This was not the case when A13 MoAb (equivalent of TCS 1) was used (vs V delta 1). Percentage values of NK cells, monocyte/granulocyte series activated cells and B lymphocytes did not differ significantly in malignant and non-malignant effusions. It is concluded that these are T lymphocyte subpopulations which are apparently distinct in both effusion groups examined.
