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Department of Immunology and Microbiology, Wayne State University, Detroit MI 48201
Regulation of the immune response is critical to homeostasis. While
innate immunity can influence the development of adaptive immune
responses, its role in regulation is less well understood. Recently, NK
cells have been implicated in the control of experimental autoimmune
encephalomyelitis, an animal model for multiple sclerosis. In this
report, we show that rat bone marrow-derived NK cells exhibited potent
inhibitory effects on T cell proliferation to both Con A as well as the
central nervous system Ag myelin basic protein. There was also a
significant decrease in both IFN-
and IL-10 production in vitro,
whereas levels of the
-chemokine monocyte chemoattractant protein-1
were significantly elevated. Flow cytometry studies suggest that the NK
cells may play an important role in regulating both normal and
autoimmune T cell responses by exerting a direct effect on activated,
autoantigen-specific T cells.
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