Novel approaches in the treatment of multiple sclerosis

Multiple sclerosis (MS) is a chronic autoimmune disease of the central nervous system, which usually affects young adults. The most common clinical course of the disease is the relapsing-remitting form of multiple sclerosis (RRMS). Although there is no causative therapy, treatment outcomes in patients with RRMS have been significantly improved with the introduction of disease modifying therapy (DMT), which decreases disease activity and delays progression of disability. Drugs used as DMT are immune modulator and immunosuppressive drugs. The conventional immunomodulatory drugs, interferons (IFN-β 1b and IFN-β 1a) and glatiramer acetate, applied parenterally, have been the first line therapy for many years in patients with RRMS. IFN-β and GA are generally safe and well-tolerated. However, due to the heterogeneity of the pathophysiology and clinical presentation of MS, their efficacy is modest, which requires substitution of IFN-β with GA or the use of certain novel immunomodulatory therapies: monoclonal antibodies, alemtuzumab and natalizumab, (parenteral administration) or teriflunomide, dimethyl-fumarate and fingolimod (peroral administration). The antineoplastic agent, mitoxantrone, is used for the treatment of aggressive forms of MS. The overall benefit/risk ratio for novel approaches in the treatment of MS has yet to be determined.