Advanced Esophageal Adenocarcinoma

This phase II/III trial compares the addition of nivolumab to the usual treatment of paclitaxel and ramucirumab to paclitaxel and ramucirumab alone in treating patients with gastric or esophageal adenocarcinoma that may have spread from where it first started to nearby tissue, lymph nodes, or distant parts of the body (advanced). A monoclonal antibody is a type of protein that can bind to certain targets in the body, such as molecules that cause the body to make an immune response (antigens). Immunotherapy with monoclonal antibodies, such as nivolumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Ramucirumab is a monoclonal antibody that may prevent the growth of new blood vessels that tumors need to grow. Paclitaxel is in a class of medications called antimicrotubule agents. It stops cancer cells from growing and dividing and may kill them. Adding nivolumab to ramucirumab and paclitaxel may work better to treat patients with advanced stomach or esophageal cancer.

This phase III trial compares the effect of modified fluorouracil, leucovorin calcium, oxaliplatin, and irinotecan (mFOLFIRINOX) with or without nivolumab to the effect of modified fluorouracil, leucovorin calcium, and oxaliplatin (mFOLFOX) with or without nivolumab for the treatment of patients with advanced, unresectable, or metastatic HER2 negative esophageal, gastroesophageal junction, or gastric adenocarcinoma. The usual approach for patients who are not in a study is treatment with FOLFOX with some receiving an immunotherapy drug, either nivolumab or pembrolizumab, in addition to FOLFOX chemotherapy. The usual approach is defined as care most people get for cancer in the stomach, esophagus, or gastroesophageal junction. Fluorouracil is in a class of medications called antimetabolites. It stops cells from making DNA and may kill tumor cells. Leucovorin in a class of medications called folic acid analogs. When used with fluorouracil it enhances the effects of this chemotherapy drug. Irinotecan is in a class of antineoplastic medications called topoisomerase I inhibitors. It blocks a certain enzyme needed for cell division and DNA repair, and may kill cancer cells. Oxaliplatin is in a class of medications called platinum-containing antineoplastic agents. It damages the cell's DNA and may kill cancer cells. Immunotherapy with monoclonal antibodies, such as nivolumab, may help the body's immune system attack the cancer and may interfere with the ability of tumor cells to grow and spread. Some patients on this trial will receive nivolumab, in addition to mFOLFOX or mFOLFIRINOX chemotherapy. mFOLFIRINOX with or without nivolumab may be more effective than mFOLFOX with or without nivolumab by shrinking the tumor in patients with advanced, unresectable, or metastatic HER2-negative esophageal, gastroesophageal junction, or gastric adenocarcinoma.

The goal of this clinical trial is to evaluate the addition of ivonescimab to standard chemotherapy in patients with advanced or metastatic gastric and gastroesophageal adenocarcinoma. The main question it aims to answer is : Does the addition of ivonescimab increase the response to treatment ? Participants will visit the clinic every 2 weeks for checkups, treatment administration and tests for collection of adverse events.