What is "ocrelizumab"

n. A humanized monoclonal antibody with possible applications as an immunosuppressive drug.

Ocrelizumab is a humanized anti- CD20 monoclonal antibody, hence a CD20 antagonist. It targets mature B lymphocytes and hence is an immunosuppressive drug candidate. It is under development for multiple sclerosis by Hoffmann–La Roche's subsidiary Genentech, and Biogen Idec.