Intra-CNS activation by antigen-specific T lymphocytes in experimental autoimmune encephalomyelitis
Autor: | Olle Lidman, Saad Muhallab, Tomas Olsson, Robert Weissert, Anders Svenningsson |
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Rok vydání: | 2001 |
Předmět: |
Central Nervous System
Encephalomyelitis Autoimmune Experimental T-Lymphocytes Encephalomyelitis Immunology Biology Autoantigens Epitope Flow cytometry Epitopes Interferon-gamma Myelin Recurrence In vivo medicine Animals Immunology and Allergy Cytotoxic T cell Cells Cultured medicine.diagnostic_test Experimental autoimmune encephalomyelitis Brain Intracellular Membranes medicine.disease Rats Kinetics medicine.anatomical_structure Neurology Rats Inbred Lew Antibody Formation Chronic Disease Cytokines Neurology (clinical) Cell Division Ex vivo |
Zdroj: | Journal of Neuroimmunology. 113:202-211 |
ISSN: | 0165-5728 |
DOI: | 10.1016/s0165-5728(00)00438-0 |
Popis: | Identification and quantitation of autoreactive T lymphocytes is crucial in order to understand the pathogenesis of autoimmune diseases. We used flow cytometry to analyze autoantigen-specific T cellular responses in the well characterized rat experimental autoimmune encephalomyelitis (EAE) model. Cells isolated from both the central nervous system (CNS) tissue and peripheral lymph nodes were analyzed directly ex vivo or after short term in vitro culture with specific autoantigen. CNS infiltrating T lymphocytes displaying an interferon-gamma response to selected encephalitogenic myelin protein epitopes were measured kinetically during an individual disease episode and also between relapses in a chronic rat EAE model. One of the EAE models used displays a restriction towards TCRBV8S2 chain usage by the encephalitogenic T cells. In this model, in vitro production of intracellular interferon-gamma was selectively detected within this T cell subset derived from both the CNS and peripheral lymph nodes. Furthermore, antigen-specific cells infiltrating the CNS in this model produced several-fold higher amounts of interferon-gamma upon antigen stimulation and displayed a significantly increased in vivo proliferation compared with peripheral lymphocytes. These data thus directly demonstrates that T cells stimulated by a specific autoantigen in the periphery primarily acquire effector functions in the cellular environment of the target organ of the autoantigen. |
Databáze: | OpenAIRE |
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