Mechanism of Action
Obinutuzumab is a monoclonal antibody that targets the CD20 antigen expressed on the surface
of pre B- and mature B-lymphocytes. Upon binding to CD20, obinutuzumab mediates B-cell
lysis through (1) engagement of immune effector cells, (2) by directly activating intracellular
death signaling pathways and/or (3) activation of the complement cascade. The immune effector
cell mechanisms include antibody-dependent cellular cytotoxicity and antibody-dependent
cellular phagocytosis