PD-1 Knockout Engineered T Cells for Castration Resistant Prostate Cancer
Withdrawn
- Conditions
- Hormone Refractory Prostate Cancer
- Interventions
- Registration Number
- NCT02867345
- Lead Sponsor
- Peking University
- Brief Summary
This study will evaluate the safety of PD-1 knockout engineered T cells in treating castration resistant prostate cancer (CRPC). Blood samples will also be collected for research purposes.
- Detailed Description
This is a dose-escalation study of ex-vivo knocked-out, expanded, and selected PD-1 knockout-T cells from autologous origin. Patients are assigned to 1 of 3 treatment groups to determine the maximal tolerant dose. After the lower number of cycles are considered tolerant, an arm of the next higher number of cycles will be open to next patients. Biomarkers and immunological markers are collected and analyzed as well.
Recruitment & Eligibility
- Status
- WITHDRAWN
- Sex
- Male
- Target Recruitment
- Not specified
Inclusion Criteria
- Pathologically and clinical verified castration resistant prostate cancer with measurable lesions (On CT: longest diameter of tumoral lesion >=10 mm, shorted diameter of lymph node >=15 mm; measurable lesions should not have been irradiated)
- Progressed after all standard treatment
- Performance score: 0-1
- Expected life span: >= 6 months
- Toxicities from prior treatment has resolved. Washout period is 4 weeks for chemotherapy, and 2 weeks for targeted therapy
- Major organs function normally
- Willing and able to provide informed consent
Exclusion Criteria
- Pathology is mixed type
- Emergent treatment of tumor emergency is needed
- Poor vasculature
- Coagulopathy, or ongoing thrombolytics and/or anticoagulation
- Blood-borne infectious disease, e.g. hepatitis B
- History of mandatory custody because of psychosis or other psychological disease inappropriate for treatment deemed by treating physician
- With other immune diseases, or chronic use of immunosuppressants or steroids
- Compliance cannot be expected
- Other conditions requiring exclusion deemed by physician
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Arm && Interventions
Group Intervention Description Test group IL-2 Peripheral blood lymphocytes will be collected and Programmed cell death protein 1(PDCD1) gene will be knocked out by CRISPR Cas9 in the laboratory (PD-1 Knockout T cells). The lymphocytes will be selected and expanded ex vivo and infused back into patients. Cyclophosphamide at 20mg/kg single dose will be administered 3 days i.v. before cell infusion. A total of 2 x 10\^7/kg PD-1 Knockout T cells will be infused in one cycle. Each cycle is divided into three administrations, with 20% infused in the first administration, 30% in the second, and the remaining 50% in the third.Interleukin-2 (IL-2) will be given in the following 5 days, 720000 international unit（IU）/Kg/ day (if tolerant). Patients will receive a total of 2, 3, 4 cycles of treatment. Comparable group IL-2 Peripheral blood lymphocytes will be collected and Programmed cell death protein 1(PDCD1) gene will not be knocked out by CRISPR Cas9 in the laboratory (PD-1 Wild-type T cells). The lymphocytes will be selected and expanded ex vivo and infused back into patients. Cyclophosphamide at 20mg/kg single dose will be administered 3 days i.v. before cell infusion. A total of 2 x 10\^7/kg PD-1 wild-type T cells will be infused in one cycle. Each cycle is divided into three administrations, with 20% infused in the first administration, 30% in the second, and the remaining 50% in the third. Interleukin-2 (IL-2) will be given in the following 5 days, 720000 international unit（IU）/Kg/day (if tolerant). Test group PD-1 Knockout T Cells Peripheral blood lymphocytes will be collected and Programmed cell death protein 1(PDCD1) gene will be knocked out by CRISPR Cas9 in the laboratory (PD-1 Knockout T cells). The lymphocytes will be selected and expanded ex vivo and infused back into patients. Cyclophosphamide at 20mg/kg single dose will be administered 3 days i.v. before cell infusion. A total of 2 x 10\^7/kg PD-1 Knockout T cells will be infused in one cycle. Each cycle is divided into three administrations, with 20% infused in the first administration, 30% in the second, and the remaining 50% in the third.Interleukin-2 (IL-2) will be given in the following 5 days, 720000 international unit（IU）/Kg/ day (if tolerant). Patients will receive a total of 2, 3, 4 cycles of treatment. Test group Cyclophosphamide Peripheral blood lymphocytes will be collected and Programmed cell death protein 1(PDCD1) gene will be knocked out by CRISPR Cas9 in the laboratory (PD-1 Knockout T cells). The lymphocytes will be selected and expanded ex vivo and infused back into patients. Cyclophosphamide at 20mg/kg single dose will be administered 3 days i.v. before cell infusion. A total of 2 x 10\^7/kg PD-1 Knockout T cells will be infused in one cycle. Each cycle is divided into three administrations, with 20% infused in the first administration, 30% in the second, and the remaining 50% in the third.Interleukin-2 (IL-2) will be given in the following 5 days, 720000 international unit（IU）/Kg/ day (if tolerant). Patients will receive a total of 2, 3, 4 cycles of treatment. Comparable group Cyclophosphamide Peripheral blood lymphocytes will be collected and Programmed cell death protein 1(PDCD1) gene will not be knocked out by CRISPR Cas9 in the laboratory (PD-1 Wild-type T cells). The lymphocytes will be selected and expanded ex vivo and infused back into patients. Cyclophosphamide at 20mg/kg single dose will be administered 3 days i.v. before cell infusion. A total of 2 x 10\^7/kg PD-1 wild-type T cells will be infused in one cycle. Each cycle is divided into three administrations, with 20% infused in the first administration, 30% in the second, and the remaining 50% in the third. Interleukin-2 (IL-2) will be given in the following 5 days, 720000 international unit（IU）/Kg/day (if tolerant).
- Primary Outcome Measures
Name Time Method Number of participants with Adverse Events and/or Dose Limiting Toxicities as a Measure of Safety and tolerability of dose of PD-1 Knockout T cells using Common Terminology Criteria for Adverse Events (CTCAE v4.0) in patients Dose Escalation - Approximately 6 months
- Secondary Outcome Measures
Name Time Method Response Rate:Response will be evaluated according to RECIST v1.1 90 days Temporal Interleukin-6 change in the peripheral blood Baseline and 1 month and 3 months Overall Survival - OS The time from randomization to death from any cause, assessed up to 2 years Peripheral blood circulating tumor DNA 6 weeks Progression free survival - PFS From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to average 10 months Temporal Interleukin-2 change in the peripheral blood Baseline and 1 month and 3 months Temporal Interferon-γ change in the peripheral blood Baseline and 1 month and 3 months
Trial Locations
- Locations (1)
Department of Urology Peking University First Hospital
🇨🇳Beijing, Beijing, China