PD-1 Knockout Engineered T Cells for Castration Resistant Prostate Cancer

March 4, 2019 updated by: Wujiang Liu, Peking University

A Dose-escalation Phase I Trial of PD-1 Knockout Engineered T Cells for the Treatment of Castration Resistant Prostate Cancer

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.

Study Overview

Status

Withdrawn

Conditions

Intervention / Treatment

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.

Study Type

Observational

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • China
    • Beijing
      • Beijing, Beijing, China, 100034
        • Department of Urology Peking University First Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

45 years to 85 years (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Male

Description

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 Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Test group
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.
Biological: PD-1 Knockout T Cells
PD-1 Knockout T Cells and PD-1 wild-type T Cells will be made by Cell Biotech Co., Ltd. 2x107/kg T cells will be used for test group and comparable group separately.
Drug: Cyclophosphamide

Cyclophosphamide at 20mg/kg single dose will be administered 3 days i.v. before cell infusion.

Interleukin-2 (IL-2) will be given in the following 5 days, 720000 international unit（IU）/Kg/day (if tolerant).

Other Names:
  • cytophosphane
Drug: IL-2
Interleukin-2 (IL-2) will be given in the following 5 days after cell infusion, 720000 international unit（IU）/Kg/ day (if tolerant).
Other Names:
  • Interleukin-2 (IL-2)
Comparable group
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).
Drug: Cyclophosphamide

Cyclophosphamide at 20mg/kg single dose will be administered 3 days i.v. before cell infusion.

Interleukin-2 (IL-2) will be given in the following 5 days, 720000 international unit（IU）/Kg/day (if tolerant).

Other Names:
  • cytophosphane
Drug: IL-2
Interleukin-2 (IL-2) will be given in the following 5 days after cell infusion, 720000 international unit（IU）/Kg/ day (if tolerant).
Other Names:
  • Interleukin-2 (IL-2)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
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
Time Frame: Dose Escalation - Approximately 6 months
Dose Escalation - Approximately 6 months

Secondary Outcome Measures

Outcome Measure
Time Frame
Response Rate:Response will be evaluated according to RECIST v1.1
Time Frame: 90 days
90 days
Progression free survival - PFS
Time Frame: 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
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
Overall Survival - OS
Time Frame: The time from randomization to death from any cause, assessed up to 2 years
The time from randomization to death from any cause, assessed up to 2 years
Peripheral blood circulating tumor DNA
Time Frame: 6 weeks
6 weeks
Temporal Interleukin-2 change in the peripheral blood
Time Frame: Baseline and 1 month and 3 months
Baseline and 1 month and 3 months
Temporal Interferon-γ change in the peripheral blood
Time Frame: Baseline and 1 month and 3 months
Baseline and 1 month and 3 months
Temporal Interleukin-6 change in the peripheral blood
Time Frame: Baseline and 1 month and 3 months
Baseline and 1 month and 3 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Peking University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

November 1, 2016

Primary Completion (ANTICIPATED)

November 1, 2020

Study Completion (ANTICIPATED)

December 1, 2020

Study Registration Dates

First Submitted

August 11, 2016

First Submitted That Met QC Criteria

August 11, 2016

First Posted (ESTIMATE)

August 15, 2016

Study Record Updates

Last Update Posted (ACTUAL)

March 6, 2019

Last Update Submitted That Met QC Criteria

March 4, 2019

Last Verified

August 1, 2016

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 11007965939

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

IPD Plan Description

Plan to open

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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