||Nivolumab is a genetically engineered, fully human immunoglobulin (Ig) G4 monoclonal antibody directed against the negative immunoregulatory human cell surface receptor programmed death-1 (PD-1,PCD-1) with immune checkpoint inhibitory and antineoplastic activities.
||Atezolizumab is a fully humanized, IgG1 monoclonal antibody that blocks the interaction of PD-L1 with both PD-1 and B7.1, but not the interaction of PD-L2 with PD-1.
||Pembrolizumab is a potent, highly selective, fully humanized immunoglobulin (Ig) G4-kappa monoclonal antibody against PD-1 with potential immune checkpoint inhibitory and antineoplastic activities.
||Cetuximab, a novel molecular-targeted agent,is an inhibitor of EGFR monoclonal humanized antibody interacting with the extracellular binding site of EGFR to block ligand stimulation.
||Ipilimumab is an immunomodulatory monoclonal antibody directed against the cell surface antigen CTLA-4 and also a type of immune checkpoint inhibitor.