A Multi-Cancer, Multi-State, Platform Study of Durvalumab (MEDI4736) and Oleclumab (MEDI9447) in Pancreatic Adenocarcinoma, Non-Small Cell Lung Cancer and Squamous Cell Carcinoma of the Head and Neck to Correlate Clinical, Molecular and Immunologic Parameters With DNA Methylation

Durvalumab is a human immunoglobulin G (IgG)1 kappa monoclonal antibody directed against human PD-L1. Durvalumab selectively binds human PD-L1 with high affinity and blocks its ability to bind to PD-1 and cluster of differentiation (CD)80. The fragment crystallizable (Fc) domain of durvalumab contains a triple mutation in the constant domain of the IgG1 heavy chain that reduces binding to the complement component C1q and the Fc gamma receptors responsible for mediating antibody dependent cell mediated cytotoxicity.

Oleclumab is a human immunoglobulin G1 lambda monoclonal antibody (mAb) with a triple mutation in the heavy chain constant region for reduced effector function. Oleclumab selectively binds to cluster of differentiation 73 (ecto-5'-nucleotidase) (CD73) and inhibits CD73-associated ectonucleotidase activity, thereby inhibiting the CD73-mediated production of immunosuppressive adenosine. Extracellular adenosine contributes to the immunosuppressive effects of both regulatory T cells and myeloid derived suppressor cells, among others. This, in turn, leads to increased antitumor immunity.