A simplified, conceptual diagram of a humoral immune response to a therapeutic protein and targets of various immunomodulatory agents. Immune modulation with rituximab (anti-CD20 monoclonal antibody), plus methotrexate and intravenous gamma globulin (IVIG) in infantile CRIM-negative Pompe patients has resulted in tolerance induction in the naïve setting or after early detection of an antibody response to rhGAA, but prior to the development of high sustained antibody titers (HSAT).16,17 Neither rituximab nor methotrexate depletes long-lived plasma cells, the source of such sustained antibody responses. Bortezomib acts against both short- and long-lived plasma cells. *Effects of bortezomib are not necessarily limited to those depicted in the above figure. APC: antigen presenting cell, TCR: T-cell receptor, BCR: B-cell receptor. (Credit: Image courtesy of Duke University Medical Center) |
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