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Ia-restricted encephalitogenic T lymphocytes mediating EAE lyse autoantigen-presenting astrocytes

Nature volume 320, pages 70–72 (1986)Cite this article

Abstract

T lymphocytes specific for myelin basic protein (MBP) are responsible for the cellular events leading to autoimmune disease within the central (CNS) and peripheral (PNS) nervous systems. Both in actively induced and T-cell transfer versions of experimental autoimmune encephalomyelitis (EAE) and neuritis (EAN), the autoaggressive T cells are activated outside the nervous system and reach their target tissue via the blood circulation. The target specificity of the autoaggressive T cells is impressive; T-cell lines specific for MBP predominantly home to and affect the white matter of the CNS1–3 whereas T cells specific for PNS myelin protein P2 exclusively infiltrate peripheral nerves4,5. Having penetrated the tight blood tissue barriers, the lymphocytes seem to interact with local cells expressing the relevant autoantigen in an immunogenic form. Although the exact mechanism of target finding and destruction is unknown, studies from our laboratory have shown that astrocytes, a main component of the normal CNS glia, can actively present antigen to specific T cells6,7. This observation suggests that astrocytes are involved in natural immune reactivity within the CNS, and that they may be involved in pathological aberrations, such as in the development of autoimmune lesions. Having studied astrocyte/T-cell interactions in more detail, we discovered that encephalitogenic T-cell lines recognizing MBP on astrocytes will subsequently proceed to kill the presenting cells. Here we report that astrocyte killing follows the rules governing ‘classical’ T-cell-mediated cytolysis; it is antigen-specific, restricted by antigens of the major histocompatibility complex (MHC) and apparently contact-dependent. Our data suggest that the nature of the recognized antigenic epitope determines whether or not antigen recognition is followed by killing; moreover, killing of antigen-presenting astrocytes seems to be correlated with the capacity to transfer encephalomyelitis to normal syngeneic rats.

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  1. Max-Planck-Gesellschaft, Klinische Forschungsgruppe für Multiple Sklerose, D-8700, Würzburg, FRG

    D. Sun & H. Wekerle

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  1. D. Sun
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  2. H. Wekerle
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Sun, D., Wekerle, H. Ia-restricted encephalitogenic T lymphocytes mediating EAE lyse autoantigen-presenting astrocytes. Nature 320, 70–72 (1986). https://doi.org/10.1038/320070a0

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