Single Agent and Combined Inhibition After Allogeneic Stem Cell Transplant

Nivolumab is a fully humanized immunoglobulin 4 (IgG4) monoclonal antibody (mAb) which binds to PD-1 (CD279) with nanomolar affinity and shows a high degree of specificity for PD-1; blocking binding of PD-1 to PD-L1 and PD-L2. Nivolumab binds selectively to human PD-1 and does not bind to other members of the cluster of differentiation protein 28 (CD28) family.

Ipilimumab is a recombinant, human mAb that binds to the cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4). Ipilimumab is an immunoglobulin 1 (IgG1) kappa immunoglobulin with an approximate molecular weight of 148 kilo-Daltons (kDa). Ipilimumab is produced in mammalian (Chinese hamster ovary) cell culture.