The Safety and Clinical Efficacy of RAK Cell Therapy in Late-stage Gastric Cancer: A Randomized Controlled Trial

Inclusion Criteria: * 1\. Subjects voluntarily join this study and sign the informed consent form. 2. Age ≥18 years and ≤70 years. 3. Confirmed by gastroscopic pathology or imaging (enhanced CT/PET-CT) as Stage IV gastric cancer or gastroesophageal junction adenocarcinoma (cTanyNanyM1). Metastatic sites include but are not limited to: liver, peritoneum, lungs, pancreas, greater omentum, retroperitoneal lymph nodes, etc. 4\. Failure or disease progression after prior frontline anti-tumor therapy (including ineffective first- and second-line chemotherapy, targeted therapy, and immunotherapy for advanced gastric cancer). 5\. Have measurable solid tumors (efficacy evaluation standard: RECIST 1.1); tumor assessment via CT scan or MRI must be performed within 28 days before treatment. 6\. Physical performance status ECOG 0-3. 7. Expected lifespan ≥1 month. 8. Participants must be able to understand the study procedures and agree to participate in the study by providing written informed consent. Exclusion Criteria: * 1\. Concurrent other types of malignancy. 2. Severe cardiac, pulmonary, or cerebral system diseases. 3. Expected survival \<1 month. 4. Laboratory investigations indicating unsuitability for receiving anti-tumor biotherapy: 1. Moderate to severe bone marrow suppression: (HGB \<80 g/L; WBC \<2.0×10⁹/L; ANC \<1.0×10⁹/L; PLT \<50×10⁹/L). 2. Significantly decreased liver function (Child-Pugh Grade C). 3. Severe renal insufficiency (CKD Stage III and above). 4. Severe coagulation dysfunction (INR ≥1.5 or APTT \>1.5 × ULN).