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Characterization of nickel-specific T cell clones
S Silvennoinen-Kassinen1, K Poikonen, I Ikäheimo
1Department of Medical Microbiology, University of Oulu, Finland.
Scandinavian Journal of Immunology
|April 1, 1991
Summary
Nickel allergy involves specific T cells that utilize alpha beta T cell receptors. These cells, while phenotypically similar, produce diverse soluble mediators during the allergic reaction.
Area of Science:
- Immunology
- Dermatology
Background:
- Nickel is a common cause of allergic contact dermatitis.
- Understanding the cellular immune response in nickel sensitivity is crucial.
Purpose of the Study:
- To investigate cellular immune reactions in nickel sensitivity.
- To determine if nickel induces selective pressure on T cell receptor gene usage.
Main Methods:
- Analysis of twelve nickel-specific T cell clones.
- Flow cytometry for cell surface markers.
- ELISA for soluble mediators.
Main Results:
- T cell clones predominantly used T cell receptor alpha beta genes.
- Clones were T helper cells with primed memory markers (CD4+ CD45RO+).
- Varied secretion of interleukins (IL-2 receptor, IL-1 beta, IL-4, IL-6) was observed, with IL-2R and IL-6 peaking before IL-4.
Conclusions:
- Nickel-specific T cell clones in the late effector phase favor alpha beta T cell receptors.
- Nickel-specific T cell clones are phenotypically similar but differ in mediator production.