Clinical Safty and Efficacy Study of Infusion of iNKT Cells and CD8+T Cells in Patients With Advanced Solid Tumor

This trial tests the safety and effectiveness of infusing two types of immune cells — iNKT cells and CD8+ T cells — in patients with advanced solid tumors (such as lung, stomach, pancreatic, liver, or colorectal cancer) to see if these immune cells can attack and shrink the cancer. **You may be eligible if...** - You have an advanced cancer confirmed by biopsy — specifically lung, gastric (stomach), pancreatic, liver (hepatocellular carcinoma), or colorectal cancer - Your blood counts and organ function (kidneys, liver) are within acceptable ranges - You are in good functional health (Karnofsky score 80% or above) and your oxygen levels are adequate - You do not have a genetic disease - You are willing to use contraception and have a negative pregnancy test (if applicable) - You are willing to participate in long-term follow-up for up to 1 year **You may NOT be eligible if...** - You have a serious heart condition, recent heart attack, kidney failure, or respiratory failure - You have lymphoma or leukemia (blood cancers) - You have a serious active infection - You are HIV positive, or have active hepatitis B or C - You are currently receiving chemotherapy or another experimental treatment - You have an immune deficiency or autoimmune disease - You are pregnant or breastfeeding Talk to your doctor to see if this trial is right for you.