Immunotherapy Clinical Trial
Official title:
Clinical Study of CAIX-targeted CAR-T Cells in the Treatment of Advanced Renal Cell Carcinoma
This is an experimental study to evaluate the safety and efficacy of CAR T cells targeting CAIX in the treatment of advanced renal cancer.
We designed a clinical study and divided the trial into two phases. Phase 1 (climbing test) : 12 patients were randomly divided into 4 groups (n=3). 12 patients were treated with cyclophosphamide at the dose of 60mg/kg/d 8-7 days before CAR-T cell infusion, and fludalabine at the dose of 25mg/m^2/d 6-2 days before CAR-T cell infusion. 5 mg anti-human CAIX monoclonal antibody (G250) was injected into the hepatic artery of each patient by an interventional catheter on the day before CAR-T cells infusion. On Day 0, CAR T cells were injected into patients in group 1, 2, 3 or 4 at the dose of 1x10^7/ person, 1*10^8/ person, 1*10^9/ person or 1*10^10/ person, respectively. The infusion time is about 15-30min. On day 0-14, IL-2 (75000IU/kg) was injected subcutaneously once a day. From day 15-28, IL-2 (75000IU/kg) was subcutaneously injected into the patients three times a week. The purpose of this study is to assess subjects' MTD (maximum tolerated dose) against CAR T cells. Phase 2: After determining the appropriate therapeutic dose for patients with renal cell carcinoma, 8 patients received the same pre-treatment of chemotherapy and G250 antibody. Then, the appropriate therapeutic dose of CAR T cells according to the results of phase 1 was infused on Day 0. On day 0-14,IL-2 (75000IU/kg) was given subcutaneously once a day. On day 15-28, IL-2 (75000IU/kg) was given subcutaneously three times a week. Peripheral blood was collected every 4 weeks to evaluate proliferation and survival of CAR-T cells. After 6 months of close follow-up, subjects will undergo a medical history evaluation, physical examination, and blood tests quarterly for 2 years. After this assessment, subjects will be enrolled in an annual telephone follow-up and questionnaire study for up to five years to evaluate treatment for long-term health problems, such as recurrence of malignant tumors. ;
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