Phase II Study of Short Course FOLFOX Chemotherapy With Either Nivolumab or Nivolumab + Radiation in the First Line Treatment of Metastatic or Unresectable Gastroesophageal Cancers (BMS Protocol CA209-76L)

Nivolumab (OpdivoTM) is a potent and highly selective humanized monoclonal antibody (mAB) designed to block the interaction between PD-1 and its ligands, PD-L1 and PD-L2. Cancer cells are able to send a signal to the PD-1 via the PD-L1 molecule, tricking the T-cell into recognizing the cancer cell as normal. Nivolumab is designed to disrupt that signal and expose the cancer cell to the immune system. Nivolumab is given intravenously over a 60-minute period, usually every two weeks.