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Characterization of functional T-cell lines derived from MRL mice
Clinical Immunology and Immunopathology
|September 1, 1986
Summary
T cells in autoimmune disease models were studied. Researchers found T cells reactive to self-molecules, driving B-cell activation and lymphocyte proliferation, potentially causing autoimmune symptoms.
Area of Science:
- Immunology
- Autoimmune Diseases
- T cell Biology
Background:
- MRL/Mp-lpr/lpr mice develop autoimmune disease.
- The role of T cells in this process requires further characterization.
Purpose of the Study:
- To establish and characterize T cell lines from MRL/Mp-lpr/lpr mice.
- To investigate the reactivity of these T cells towards autologous cells and their role in autoimmune pathogenesis.
Main Methods:
- Continuous T cell lines were generated from spleen and lymph nodes of MRL/Mp-lpr/lpr and control mice.
- Cell lines were analyzed for surface markers, alloreactivity, and proliferative responses to various stimuli, including autologous cells and Interleukin-2 (IL-2).
- Functional assays involved co-culture with B cells and lymph node cells.
Main Results:
- Established T cell lines lost alloreactivity but proliferated vigorously against autologous irradiated spleen cells, restricted to I-Ak.
- T cell lines expressed markers including IL-2 receptor and responded to IL-2.
- Co-culture with B cells induced B cell division and antibody production; co-culture with lymph node cells caused proliferation.
Conclusions:
- Lpr lymphoid tissue contains T cells reactive to autologous Ia molecules.
- These T cells can induce B cell activation and lymphocyte proliferation, potentially contributing to hypergammaglobulinemia, autoantibody production, and lymphoproliferation in systemic lupus erythematosus (SLE) mice.