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Published on: April 18, 2016
The CD39 molecule defines distinct cytotoxic subsets within alloactivated human CD8-positive cells
C Gouttefangeas1, I Mansur, M Schmid
1Hôpital Saint-Louis, INSERM U 93, Paris, France.
European Journal of Immunology
|October 1, 1992
Summary
CD39 expression helps distinguish between cytotoxic T lymphocytes and natural killer (NK)-like cells within CD8+ alloactivated populations. This finding aids in understanding immune cell subsets and their specific functions after activation.
Area of Science:
- Immunology
- Cell Biology
Background:
- Lymphocyte activation leads to increased expression of various surface molecules.
- CD39 was initially found on activated B lymphocytes and later on activated T cell clones.
Purpose of the Study:
- To phenotypically and functionally characterize cell subsets generated during in vitro allostimulation.
- To investigate the role of CD39 expression in distinguishing immune cell functions.
Main Methods:
- In vitro allostimulation of lymphocytes.
- Flow cytometry for phenotypic characterization (CD39, CD8).
- Functional assays to assess cytotoxic T lymphocyte and NK-like reactivity.
Main Results:
- CD39 expression peaked at day 6 and remained stable in alloactivated cells.
- CD39+ CD8+ alloactivated cells exhibited specific cytotoxic T lymphocyte activity.
- CD39- CD8+ alloactivated cells predominantly showed natural killer (NK)-like reactivity.
- Lack of CD39 expression correlated with NK-like activity, independent of CD56 or CD57.
Conclusions:
- CD39 is a valuable marker for differentiating alloactivated CD8+ cytotoxic T lymphocyte and NK-like cell subsets.
- This distinction provides a more refined understanding of immune responses following allostimulation.
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