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Brief Definitive Report |
Correspondence to: Andrew D. Luster, Massachusetts General Hospital-East, Bldg. 149 13th St., Charlestown, MA 02129. Tel:617-726-5710 Fax:617-726-5651
Monocyte recruitment to the central nervous system (CNS) is a necessary step in the development of pathologic inflammatory lesions in experimental autoimmune encephalomyelitis (EAE), a murine model of multiple sclerosis. Monocyte chemoattractant protein (MCP)-1, a potent agonist for directed monocyte migration, has been implicated in the pathogenesis of EAE. Here we report that deficiency in CC chemokine receptor (CCR)2, the receptor for MCP-1, confers resistance to EAE induced with a peptide derived from myelin oligodendrocyte glycoprotein peptide 3555 (MOGp3555). CCR2-/- mice immunized with MOGp3555 failed to develop mononuclear cell inflammatory infiltrates in the CNS and failed to increase CNS levels of the chemokines RANTES (regulated on activation, normal T cell expressed and secreted), MCP-1, and interferon (IFN)-inducible protein 10 (IP-10) as well the chemokine receptors CCR1, CCR2, and CCR5. Additionally, T cells from CCR2-/- immunized mice showed decreased antigen-induced proliferation and production of IFN-
compared with wild-type immunized controls, suggesting that CCR2 enhances the T helper cell type 1 immune response in EAE. These data indicate that CCR2 plays a necessary and nonredundant role in the pathogenesis of EAE.
Key Words: receptors, chemokine, chemokines, macrophages, encephalomyelitis, cytokines
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