A Trial of NIS793 With FOLFIRINOX in Pancreatic Cancer

This is a randomized phase 2 study evaluating the efficacy of NIS793, a TGF-beta inhibitor, when added to a standard chemotherapy program of modified FOLFIRINOX for people with previously-untreated, resectable or borderline resectable pancreatic adenocarcinoma. The U.S. Food and Drug Administration (FDA) has not approved NIS793 as a treatment for any disease. NIS793 works by blocking a molecule called TGF-beta. TGFbeta has been shown to promote the growth of pancreatic cancer and this study is examining if the addition of a TGF-beta blocking drug will allow the chemotherapy to work better against the cancer. The research study procedures include screening for eligibility and study treatment including evaluations and follow up visits. Participants will be randomized into two groups of: * Arm A will receive standard chemotherapy, mFOLFIRINOX, in combination with NIS793. * Arm B will receive standard chemotherapy, mFOLFIRINOX. Based on study team determination, some participants may be offered chemoradiation following completion of chemotherapy and/or surgery following either completion of chemotherapy or chemoradiation. Study treatment is expected to last up to 16 weeks unless disease symptom worsens . It is expected that about 45 people will take part in this research study.