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Posted 28/11/2023
Ocrelizumab is a therapeutic monoclonal antibody (mAb) that represents a different scientific approach to treating multiple sclerosis (MS). It is a humanized anti-CD20 mAb that targets CD20 marker on B lymphocytes, a typo of immune cell that plays a key role in the disease and serves as an immunosuppressive drug. Ocrelizumab binds selectively to CD20, which is expressed on the membrane of B cells. When ocrelizumab binds to CD20 on B cells, these cells are eliminated by antibody-dependent cell-mediated cytotoxicity and, to a lesser extent, complement-dependent cytotoxicity.