Study Evaluating the Efficacy and Safety With CAR-T for Stomach Cancer

This single-arm, multicenter Phase 2 trial will treat the patients who have relapsed or refractory stomach cancer with an infusion of the patient's own T cells that have been genetically modified to express a chimeric antigen receptor(CAR) that will bind to tumor cells that express the EPCAM protein on the cell surface.The study will determine if these modified T cells help the body's immune system eliminate tumor cells.The trial will also study the safety of treatment with CAR-T, how long CAR-T cells stay in the patient's body and the impact of this treatment on survival.

This is a single-arm, multicenter Phase 2 study to evaluate the efficacy and safety of the CAR-T for Stomach Cancer. The study will be conducted using a phaseⅠ /Ⅱ design.The study will have the following sequential phases: Part A(screening leukapheresis, cell product preparation, and cytoreductive chemotherapy) and Part B(treatment and follow-up). The follow-up period for each participant is approximately 35 months after the final CAR-T infusion.The total duration of the study is expected to be approximately 3 years. A total of 19 patients may be enrolled over a period of 3 years.

Eligibility Criteria:
Inclusion Criteria:

1. According to UICC or gastric cancer diagnosis and treatment guideline of diagnosis for patients with gastric cancer, first-line and second-line chemotherapy of advanced gastric cancer, and through flow cytometry or immune tissues (cell) chemistry, confirm the tumor cells positive expression of relevant molecular targets;
2. Age \<=75 years old, both male and female;
3. Is expected to survive more than 3 months;
4. Physical condition is good: 0-2 score ECOG score;
5. The lymphocyte count must \> =0.4\*10\^9/L at the time of collection of peripheral blood;
6. Vital organs (heart, kidney) function is normal, there is no major wound healing. No serious virus, bacterial infection;
7. Non pregnancy and lactation;
8. History of severe allergic reactions without biological products;
9. Voluntary participation, good compliance,the subjects can cooperate with the experimental observation, and signed a written Informed Consent Form;
10. At least one measurable lesion.

Exclusion Criteria:

1. Pregnant or lactating women;
2. Organ failure, such as heart: Class III and IV; liver: to Chlid grading of liver function grade C; kidney: kidney failure and uremia stage; lung: symptoms of severe respiratory failure; brain: disorder of consciousness;
3. Patients with significant graft versus host disease (GVHD) after organ transplant history or allogeneic hematopoietic stem cell transplantation;
4. Long term use of immunosuppressive drugs or people with severe autoimmune diseases;
5. Any other chronic disease patients who have been treated with immune agents or hormone therapy;
6. A serious infectious disease with severe, uncontrollable, wound healing
7. Allergy to the interleukin and interferon cytokine;
8. Coagulation abnormalities and severe thrombosis;
9. Patients who have participated in other clinical trials or other clinical trials in the past 30 days
10. The Investigator believe the patients should not participate in this experiment.