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Type 1 and type 2: a fundamental dichotomy for all T-cell subsets
1Trudeau Institute, Saranac Lake, NY 12983, USA. carter@northnet.org
Current Opinion in Immunology
|June 1, 1996
Summary
Cytokine secretion extends beyond CD4+ T cells. Specialized Type 1 and Type 2 subsets of CD8+ and gamma delta T cells can be generated and found, highlighting their physiological importance.
Area of Science:
- Immunology
- Cellular immunology
- T cell subsets
Background:
- Cytokine secretion is a key immune response mediator.
- Traditionally, CD4+ T cells are recognized for diverse cytokine profiles.
- The role of other T cell populations in cytokine production requires further elucidation.
Purpose of the Study:
- To investigate the capacity for cytokine secretion in CD8+ and gamma delta T cells.
- To determine if distinct Type 1 and Type 2 polarized subsets exist within these T cell populations.
- To underscore the significance of these T cell subsets and their functions.
Main Methods:
- In vitro generation of T cell populations.
- Isolation of T cell subsets from in vivo samples.
- Analysis of cytokine secretion profiles.
Main Results:
- Cytokine secretion was confirmed in CD8+ T cells.
- Type 1 and Type 2 polarized populations were identified within CD8+ T cells.
- Cytokine-secreting Type 1 and Type 2 gamma delta T cell subsets were also generated and isolated.
Conclusions:
- Cytokine secretion is not exclusive to CD4+ T cells.
- CD8+ and gamma delta T cells can differentiate into functionally distinct Type 1 and Type 2 subsets.
- These alternative T cell subsets play significant roles in immune responses.