Anti-ICOS/CD278 (MEDI-570) is a Fc-optimized humanized immunoglobulin (Ig) G1 monoclonal antibody (MoAb) directed against the inducible T-cell co-stimulator (ICOS, CD278) with potential immune checkpoint inhibitory and antineoplastic activities. It has the potential to treat non-Hodgkin lymphomas. MW: 146.82 KD.