MS is a chronic inflammatory disease of the central nervous system characterized by focal T cell and macrophage infiltrates that lead to demyelination and loss of neurologic function. Four therapies are currently approved for the treatment of MS. Three of these are approved for the treatment of patients with the relapsing-remitting (RR) form of MS, in which patients have clinical exacerbations followed by partial or complete recovery of function. These treatments are only modestly effective and are associated with significant toxicity, often causing patients to delay therapy for significant lengths of time. Thus, there is a need to find therapies with low toxicities that can be administered early during the disease course with the potential for arresting the disease.