✍ Scribed by Jan Bauer; Helmut Rauschka; Hans Lassmann
No coin nor oath required. For personal study only.
Many basic aspects of brain inflammation, recently disclosed in experimental models, are reflected in the pathology of human inflammatory brain diseases. Examples include the key role of T lymphocytes in immune surveillance and in the regulation of the inflammatory response, the essential contributions of adhesion molecules, proinflammatory cytokines, chemokines, and proteases in the recruitment of inflammatory cells into the nervous tissue, the modulating effect of glia cells on the inflammatory process and the termination of T‐cell‐mediated inflammation by apoptotic cell death. Despite this progress in our understanding of the pathogenesis of brain inflammation, there are still major unresolved questions. Because of technical constraints, most of our knowledge on central nervous system inflammation so far relates to the role of a specific T‐cell subset, the so‐called T‐helper‐1 cells. Other T‐cell subsets, in particular cytotoxic class I MHC‐restricted T lymphocytes, however, appear to be of major importance in human disease. Furthermore, the detailed mechanisms, which are responsible for the profound differences in the patterns of tissue damage in different human inflammatory brain diseases, such as multiple sclerosis or various forms of virus encephalitis, are largely unresolved. We discuss the open questions to be addressed in the future, which, when answered, may help to design novel therapeutic strategies. GLIA 36:235–243, 2001. © 2001 Wiley‐Liss, Inc.
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