P-PSMA-101 CAR-T Cells in the Treatment of Subjects With Metastatic Castration-Resistant Prostate Cancer (mCRPC) and Advanced Salivary Gland Cancers (SGC)

NCT ID: NCT04249947

Last Updated: 2025-02-17

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

TERMINATED

Clinical Phase

PHASE1

Total Enrollment

40 participants

Study Classification

INTERVENTIONAL

Study Start Date

2020-02-28

Study Completion Date

2024-09-30

Brief Summary

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An open-label, multi-center, single and cyclic ascending dose study of P-PSMA-101 autologous CAR-T cells in patients with mCRPC and SGC.

Detailed Description

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This is an open label, multi-center Phase 1 study that will follow a 3 + 3 design of dose-escalating cohorts of single and multiple doses of P-PSMA-101 to determine a Recommended Phase 2 Dose (RP2D). Additional participants will be treated with P-PSMA-101 at the determined RP2D.

Following consent, enrolled participants will undergo a leukapheresis procedure to obtain peripheral blood mononuclear cells (PBMCs) which will be sent to a manufacturing site to produce P-PSMA-101 CAR-T cells. The cells will then be returned to the investigational site and administered after a lymphodepleting chemotherapy regimen. Rimiducid may be administered as indicated.

Conditions

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Prostatic Neoplasms, Castration-Resistant Neoplasms by Histologic Type Neoplasms, Prostate Prostate Cancer Metastatic Castration-resistant Prostate Cancer Neoplasms Prostatic Neoplasms Genital Neoplasms, Male Urogenital Neoplasms Neoplasms by Site Prostatic Disease Salivary Gland Cancer Salivary Gland Tumor Adenoid Cystic Carcinoma Salivary Duct Carcinoma Mucoepidermoid Carcinoma Acinic Cell Tumor

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SEQUENTIAL

Open label, 3 + 3 design of dose-escalating cohorts with open label, dose expansion at RP2D
Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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P-PSMA-101 CAR-T cells (Single Dose - Part 1a)

Single ascending dose cohorts, given in a single intravenous infusion of CAR-T cells, following conditioning chemotherapy regimen A. Rimiducid may be administered as indicated.

Group Type EXPERIMENTAL

P-PSMA-101 CAR-T cells

Intervention Type BIOLOGICAL

P-PSMA-101 is an autologous chimeric antigen receptor (CAR) T-cell therapy designed to target prostate cancer cells expressing the cell surface antigen prostate-specific membrane antigen (PSMA).

Rimiducid

Intervention Type DRUG

Rimiducid (safety switch activator) may be administered as indicated

P-PSMA-101 CAR-T cells (Multiple Dose - Part 1b)

Cyclic administration of ascending dose cohorts, given in a single intravenous infusion of CAR-T cells, following conditioning chemotherapy regimen A. Rimiducid may be administered as indicated.

Group Type EXPERIMENTAL

P-PSMA-101 CAR-T cells

Intervention Type BIOLOGICAL

P-PSMA-101 is an autologous chimeric antigen receptor (CAR) T-cell therapy designed to target prostate cancer cells expressing the cell surface antigen prostate-specific membrane antigen (PSMA).

Rimiducid

Intervention Type DRUG

Rimiducid (safety switch activator) may be administered as indicated

P-PSMA-101 CAR-T cells (Single Dose - Part 1c)

Single ascending dose cohorts, given in a single intravenous infusion of CAR-T cells, following conditioning chemotherapy regimen B. Rimiducid may be administered as indicated.

Group Type EXPERIMENTAL

P-PSMA-101 CAR-T cells

Intervention Type BIOLOGICAL

P-PSMA-101 is an autologous chimeric antigen receptor (CAR) T-cell therapy designed to target prostate cancer cells expressing the cell surface antigen prostate-specific membrane antigen (PSMA).

Rimiducid

Intervention Type DRUG

Rimiducid (safety switch activator) may be administered as indicated

P-PSMA-101 CAR-T cells (Multiple Dose - Part 1d)

Cyclic administration of ascending dose cohorts, given via intravenous infusions of CAR-T cells, following conditioning chemotherapy regimen B. Rimiducid may be administered as indicated.

Group Type EXPERIMENTAL

P-PSMA-101 CAR-T cells

Intervention Type BIOLOGICAL

P-PSMA-101 is an autologous chimeric antigen receptor (CAR) T-cell therapy designed to target prostate cancer cells expressing the cell surface antigen prostate-specific membrane antigen (PSMA).

Rimiducid

Intervention Type DRUG

Rimiducid (safety switch activator) may be administered as indicated

Interventions

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P-PSMA-101 CAR-T cells

P-PSMA-101 is an autologous chimeric antigen receptor (CAR) T-cell therapy designed to target prostate cancer cells expressing the cell surface antigen prostate-specific membrane antigen (PSMA).

Intervention Type BIOLOGICAL

Rimiducid

Rimiducid (safety switch activator) may be administered as indicated

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Subjects ≥18 years of age
* Must have a confirmed diagnosis of mCRPC or SGC
* Must have measurable disease by RECIST 1.1 or bone only metastases with measurable PSA (≥1 ng/mL) (mCRPC subjects only)
* Must have progressed by PCWG3 and/or RECIST 1.1 (mCRPC subjects only)
* Must be willing to practice birth control from screening and for 2 years after the last administration of P-PSMA-101
* Must have adequate vital organ function within pre-determined parameters
* Must have an Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1

Exclusion Criteria

* Has inadequate venous access and/or contraindications to leukapheresis
* Has an active second malignancy in addition to mCRPC or SGC, excluding low-risk neoplasms such as non-metastatic basal cell or squamous cell skin carcinoma
* Has a history of or active autoimmune disease
* Has a history of significant central nervous system (CNS) disease, such as stroke or epilepsy
* Has an active systemic (viral, bacterial or fungal) infection
* Has received anti-cancer medications (excluding GnRH targeted therapies) within 2 weeks of the time of initiating conditioning chemotherapy
* Has received immunosuppressive medications (including anti-cancer medications) within 2 weeks of initiating leukapheresis and/or expected to require them while enrolled in the study
* Has received systemic corticosteroid therapy within 2 weeks of either the required leukapheresis or is expected to require it during the course of the study
* Has CNS metastases or symptomatic CNS involvement
* Has a history of significant ocular disease
* Has a history of significant liver disease or active liver disease
* Has liver metastases (\<5 lesions and maximum diameter \</= 2.5 cm permitted)
* Has a history of or known predisposition to HLH or MAS
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Poseida Therapeutics, Inc.

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Rajesh Belani, M.D.

Role: STUDY_DIRECTOR

Sponsor Executive Medical Director

Locations

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City of Hope Comprehensive Cancer Center

Duarte, California, United States

Site Status

University of California San Diego

San Diego, California, United States

Site Status

University of California San Francisco

San Francisco, California, United States

Site Status

Sarah Cannon Research Institute at HealthONE

Denver, Colorado, United States

Site Status

Tulane University Hospital and Clinic

New Orleans, Louisiana, United States

Site Status

University of Maryland, Baltimore

Baltimore, Maryland, United States

Site Status

Dana-Farber Cancer Institute

Boston, Massachusetts, United States

Site Status

Massachusetts General Hospital

Boston, Massachusetts, United States

Site Status

Memorial Sloan Kettering Cancer Center

New York, New York, United States

Site Status

Tennessee Oncology

Nashville, Tennessee, United States

Site Status

Countries

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United States

Other Identifiers

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P-PSMA-101-001

Identifier Type: -

Identifier Source: org_study_id

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