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HLA class II restriction specificity for nickel-reactive T lymphocytes
L Emtestam1, J A Marcusson, E Möller
1Department of Dermatology, Karolinska Institute, Huddinge Hospital, Stockholm, Sweden.
Acta Dermato-Venereologica
|January 1, 1988
Summary
Human T cells respond to nickel by recognizing it through HLA class II molecules, specifically DQ and DR. DQw1 specificity was linked to antigen-presenting cell restimulation, suggesting a role in nickel allergy.
Area of Science:
- Immunology
- Human Leukocyte Antigen (HLA) research
- Allergy mechanisms
Background:
- Nickel allergy is a common hypersensitivity.
- Human Leukocyte Antigen (HLA) class II molecules (DR, DQ, DP) present antigens to T cells.
- Previous studies indicated a role for both DR and DQ in nickel-specific T cell responses.
Purpose of the Study:
- To investigate the role of DQ polymorphism in nickel-specific T cell proliferation.
- To explore the correlation between DQ polymorphism and the function of nickel-reactive T lymphocytes.
- To further elucidate the HLA class II restriction of nickel-specific T cell responses.
Main Methods:
- Priming and in vitro restimulation of nickel-specific T cells with antigen-presenting cells.
- Utilizing Restriction Fragment Length Polymorphism (RFLP) to analyze DQ polymorphism.
- Employing monoclonal antibodies against DR, DQ, and DP for blocking experiments.
Main Results:
- Both DQ and DR molecules were found to restrict the proliferative T cell response to nickel.
- Antigen-presenting cell restimulation capacity correlated with DQw1 specificity.
- Monoclonal antibodies against DR, DQ, and DP showed similar blocking capacities.
Conclusions:
- HLA DQ and DR molecules play a significant role in restricting nickel-specific T cell proliferation.
- DQw1 specificity is associated with the ability of antigen-presenting cells to restimulate nickel-reactive T cells.
- Further research with cloned T cells is needed for definitive results on HLA class II restriction in nickel allergy.