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Isolation and functional characterization of T cells from human sputum
G T Pang1, R L Clancy, G E Reeves
1Discipline of Pathology, Faculty of Medicine, University of Newcastle, Australia.
Clinical and Experimental Immunology
|December 1, 1995
Summary
Researchers developed a method to isolate and clone T cells from adult sputum. These T cells can produce pro-inflammatory cytokines, offering insights into bronchial inflammation.
Area of Science:
- Immunology
- Respiratory Medicine
Background:
- T cells are crucial for controlling bronchial inflammation via pro-inflammatory cytokines.
- Sputum T cells are a minor population, with variable activation marker expression.
Purpose of the Study:
- To establish a method for isolating and cloning T cells from adult sputum.
- To characterize the cytokine production of cloned T cells from sputum.
Main Methods:
- Isolation and cloning of T cells from adult sputum using limiting dilution after culture with rIL-2.
- Analysis of T cell populations (CD4+, CD8+) and their cytokine production.
- Detection of cytokine mRNA using reverse transcriptase-polymerase chain reaction (RT-PCR) and Southern blot.
Main Results:
- Successful isolation and cloning of T cells from sputum.
- Generated T cell clones (TCC) reflected the CD4+/CD8+ ratios found in sputum.
- CD4+ TCC and primary CD4+ T cells produced pro-inflammatory cytokines upon stimulation.
- mRNA analysis correlated with cytokine production in supernatants.
- A link was observed between sputum cell infiltrate patterns and cytokine profiles.
Conclusions:
- The developed method enables the study of sputum-derived T cells and their function.
- Sputum T cells, particularly CD4+ TCC, are capable of producing pro-inflammatory cytokines.
- Findings suggest a correlation between airway inflammation patterns and T cell cytokine profiles in the bronchial mucosa.