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Brief Definitive Reports |
Correspondence to: William J. Karpus, Department of Pathology, Northwestern University Medical School, 303 E. Chicago Ave., W127, Chicago, IL 60611. Tel:312-503-1005 Fax:312-503-1217
Experimental autoimmune encephalomyelitis (EAE) is a CD4+ T lymphocytemediated disease of the central nervous system (CNS) characterized by mononuclear cell infiltration, demyelination, and paralysis. We previously demonstrated a role for chemokines in acute and relapsing EAE pathogenesis. Presently, we investigated the role of CC chemokine receptor 2 (CCR2) in acute EAE. CCR2-/- mice did not develop clinical EAE or CNS histopathology, and showed a significant reduction in T cell and CNS-infiltrating CD45highF4/80+ monocyte subpopulations. Peripheral lymphocytes from CCR2-/- mice produced comparable levels of interferon-gamma (IFN-
) and interleukin (IL)-2 in response to antigen-specific restimulation when compared with control mice. Adoptively transferred myelin oligodendrocyte glycoprotein 35-55specific T cells lacking expression of CCR2 were able to induce EAE, whereas CCR2-/- recipients of wild-type T cells failed to develop disease. These results suggest that CCR2 expression on host-derived mononuclear cells is critical for disease induction.
Key Words: multiple sclerosis, experimental autoimmune encephalomyelitis, CC chemokine receptor 2, knockout, CCL2
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