P-MUC1C-ALLO1 Allogeneic CAR-T Cells in the Treatment of Subjects With Advanced or Metastatic Solid Tumors

NCT ID: NCT05239143

Last Updated: 2025-11-06

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

ACTIVE_NOT_RECRUITING

Clinical Phase

PHASE1

Total Enrollment

180 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-02-15

Study Completion Date

2039-04-30

Brief Summary

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A Phase 1, open label, dose escalation and expanded cohort study of P-MUC1C-ALLO1 in adult subjects with advanced or metastatic epithelial derived solid tumors, including but not limited to the tumor types listed below.

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-MUC1C-ALLO1 to determine a Recommended Phase 2 Dose (RP2D). P-MUC1C-ALLO1 is an allogeneic chimeric antigen receptor (CAR) T cell therapy designed to target cancer cells expressing Mucin1 cell surface associated C-Terminal (MUC1-C) antigen. Additional participants will be treated with P-MUC1C-ALLO1 at the determined RP2D.

Following enrollment, subjects will be treated with P-MUC1C-ALLO1 and will undergo serial measurements of safety, tolerability and response. Rimiducid may be administered as indicated.

Conditions

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Breast Cancer Ovarian Cancer Non Small Cell Lung Cancer Colorectal Cancer Pancreatic Cancer Renal Cell Carcinoma Nasopharyngeal Cancer Head and Neck Squamous Cell Carcinoma Gastric Cancer

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 recommended phase 2 dose (RP2D)
Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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P-MUC1C-ALLO1 CAR-T cells (Single Dose - Arm A)

* Single ascending dose cohorts, given in a single intravenous infusion of CAR-T cells, following lymphodepletion regimen 1.
* Rimiducid may be administered as indicated.

Group Type EXPERIMENTAL

P-MUC1C-ALLO1 CAR-T cells

Intervention Type BIOLOGICAL

P-MUC1C-ALLO1 is an allogeneic CAR-T cell therapy designed to target cancer cells expressing MUC1-C.

Rimiducid

Intervention Type DRUG

Rimiducid (safety switch activator) may be administered as indicated.

P-MUC1C-ALLO1 CAR-T cells (Multiple Dose - Arm B)

* Cyclic administration of ascending dose cohorts, given in a single intravenous infusion of CAR-T cells, following lymphodepletion regimen 1.
* Rimiducid may be administered as indicated.

Group Type EXPERIMENTAL

P-MUC1C-ALLO1 CAR-T cells

Intervention Type BIOLOGICAL

P-MUC1C-ALLO1 is an allogeneic CAR-T cell therapy designed to target cancer cells expressing MUC1-C.

Rimiducid

Intervention Type DRUG

Rimiducid (safety switch activator) may be administered as indicated.

P-MUC1C-ALLO1 CAR-T cells (Single Dose - Arm C)

* Single ascending dose cohorts, given in a single intravenous infusion of CAR-T cells, following lymphodepletion regimen 2.
* Rimiducid may be administered as indicated.

Group Type EXPERIMENTAL

P-MUC1C-ALLO1 CAR-T cells

Intervention Type BIOLOGICAL

P-MUC1C-ALLO1 is an allogeneic CAR-T cell therapy designed to target cancer cells expressing MUC1-C.

Rimiducid

Intervention Type DRUG

Rimiducid (safety switch activator) may be administered as indicated.

P-MUC1C-ALLO1 CAR-T cells (Multiple Dose - Arm D)

* Cyclic administration of ascending dose cohorts, given in a single intravenous infusion of CAR-T cells, following lymphodepletion regimen 2.
* Rimiducid may be administered as indicated.

Group Type EXPERIMENTAL

P-MUC1C-ALLO1 CAR-T cells

Intervention Type BIOLOGICAL

P-MUC1C-ALLO1 is an allogeneic CAR-T cell therapy designed to target cancer cells expressing MUC1-C.

Rimiducid

Intervention Type DRUG

Rimiducid (safety switch activator) may be administered as indicated.

P-MUC1C-ALLO1 CAR-T cells (Single Dose - Arm A1)

* Single ascending A1 dose cohorts, given in a single intravenous infusion of CAR-T cells, following lymphodepletion regimen 1.
* Rimiducid may be administered as indicated.

Group Type EXPERIMENTAL

P-MUC1C-ALLO1 CAR-T cells

Intervention Type BIOLOGICAL

P-MUC1C-ALLO1 is an allogeneic CAR-T cell therapy designed to target cancer cells expressing MUC1-C.

Rimiducid

Intervention Type DRUG

Rimiducid (safety switch activator) may be administered as indicated.

P-MUC1C-ALLO1 CAR-T cells (Single Dose - Arm E)

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

Group Type EXPERIMENTAL

P-MUC1C-ALLO1 CAR-T cells

Intervention Type BIOLOGICAL

P-MUC1C-ALLO1 is an allogeneic CAR-T cell therapy designed to target cancer cells expressing MUC1-C.

Rimiducid

Intervention Type DRUG

Rimiducid (safety switch activator) may be administered as indicated.

P-MUC1C-ALLO1 CAR-T cells (Multiple Dose - Arm F)

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

Group Type EXPERIMENTAL

P-MUC1C-ALLO1 CAR-T cells

Intervention Type BIOLOGICAL

P-MUC1C-ALLO1 is an allogeneic CAR-T cell therapy designed to target cancer cells expressing MUC1-C.

Rimiducid

Intervention Type DRUG

Rimiducid (safety switch activator) may be administered as indicated.

P-MUC1C-ALLO1 CAR-T cells (Single Dose - Arm M)

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

Group Type EXPERIMENTAL

P-MUC1C-ALLO1 CAR-T cells

Intervention Type BIOLOGICAL

P-MUC1C-ALLO1 is an allogeneic CAR-T cell therapy designed to target cancer cells expressing MUC1-C.

Rimiducid

Intervention Type DRUG

Rimiducid (safety switch activator) may be administered as indicated.

Interventions

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P-MUC1C-ALLO1 CAR-T cells

P-MUC1C-ALLO1 is an allogeneic CAR-T cell therapy designed to target cancer cells expressing MUC1-C.

Intervention Type BIOLOGICAL

Rimiducid

Rimiducid (safety switch activator) may be administered as indicated.

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Males or females, Subjects ≥18 years with life expectancy \>3 months
* Must have a confirmed diagnosis of unresectable, locally advanced or metastatic epithelial-derived cancer
* Must have progressed during or after last therapy, developed intolerance/toxicity to current treatment, or ineligible or refused other existing treatment options, and have measurable disease
* Must have an Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 or Karnofsky performance status ≥70%
* Must have adequate vital organ function within pre-determined parameters
* Must have archived tumor tissue available or consent to a biopsy collection
* Must be willing to practice birth control
* Must have a negative pregnancy test at screening and prior to initiating lymphodepletion chemotherapy or study drug administration
* Must have recovered from toxicities due to prior therapies

Exclusion Criteria

* Has inadequate venous access
* Has an active second malignancy (not disease free for at least 5 years) in addition to the studied malignancy, excluding low-risk neoplasms such as non-metastatic basal cell or squamous cell skin carcinoma
* Is pregnant or lactating
* Has a history of or active autoimmune disease
* Has a history of significant central nervous system (CNS) disease, such as stroke, epilepsy
* Has an active systemic (viral, bacterial, or fungal) infection
* Has New York Heart Association (NYHA) Class III or IV heart failure, unstable angina, or a history of myocardial infarction or significant arrhythmia
* Has any psychiatric or medical disorder that would preclude safe participation in and/or adherence to the protocol
* Has received anticancer medications within 2 weeks of the time of initiating lymphodepletion
* Has received immunosuppressive medications within 2 weeks of administration of P-MUC1C-ALLO1, and/or expected to require them while enrolled in the study
* Has received systemic corticosteroid therapy within 1 week of the administration of P-MUC1C-ALLO1 or is expected to require it during the course of the study
* Has known CNS metastases or symptomatic CNS involvement
* Has a history of significant liver disease or active liver disease
* Has a history of known genetic predisposition to HLH/MAS
* Has received anti-cancer monoclonal antibody therapy within 4 weeks of initiating LD therapy
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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Simon Heidegger, M.D.

Role: STUDY_DIRECTOR

Lead Medical Director, Oncology, Genentech Research Early Development

Locations

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University of California, Irvine Medical Center

Irvine, California, United States

Site Status

Cedars Sinai Medical Center

Los Angeles, 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

University of Iowa Hospitals and Clinics

Iowa City, Iowa, United States

Site Status

University of Kansas Cancer Center

Westwood, Kansas, United States

Site Status

Cancer Center of Kansas

Wichita, Kansas, United States

Site Status

University of Maryland Cancer Center

Baltimore, Maryland, United States

Site Status

Dana Farber Cancer Institute

Boston, Massachusetts, United States

Site Status

University of Nebraska Medical Center

Omaha, Nebraska, United States

Site Status

Montefiore Medical Center

The Bronx, New York, United States

Site Status

MD Anderson Cancer Center

Houston, Texas, United States

Site Status

NEXT Oncology

San Antonio, Texas, United States

Site Status

Countries

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United States

References

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Gorodetska I, Samusieva A, Lahuta T, Ponomarova O, Socha O, Kozeretska I. Exploring New Frontiers: Alternative Breast Cancer Treatments Through Glycocalyx Research. Breast J. 2025 May 22;2025:9952727. doi: 10.1155/tbj/9952727. eCollection 2025.

Reference Type DERIVED
PMID: 40443562 (View on PubMed)

Other Identifiers

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P-MUC1C-ALLO1-001

Identifier Type: -

Identifier Source: org_study_id