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* Institute of Pathology, School of Medicine, Case Western Reserve University, and
Department of Medicine, University Hospitals of Cleveland, Cleveland, OH 44106;
Institute of Virology and Immunology, University of Würzburg, Würzburg, Germany; and
Picower Institute for Medical Research, Manhasset, NY 11030
Macrophage migration inhibitory factor (MIF) is a cytokine that plays a critical role in the regulation of macrophage effector functions and T cell activation. However, its role in the pathogenesis of T cell-mediated autoimmune diseases, such as experimental autoimmune encephalomyelitis (EAE), has remained unresolved. In this study, we report that anti-MIF Ab treatment of SJL mice with acute EAE improved the disease severity and accelerated the recovery. Furthermore, the anti-MIF treatment impaired the homing of neuroantigen-reactive pathogenic T cells to the CNS in a VCAM-1-dependent fashion. Interestingly, MIF blockade also decreased the clonal size of the neuroantigen-specific Th1 cells and increased their activation threshold. Taken together, the results demonstrate an important role for MIF in the pathogenesis of EAE/multiple sclerosis and suggest that MIF blockade may be a promising new strategy for the treatment of multiple sclerosis.
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