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A Phase 1 Dose Escalation and Expanded Cohort Study of P-MUC1C-ALLO1 in Adult Subjects With Advanced or Metastatic Solid Tumors


Description

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.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.

Trial Eligibility

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, refractory to standard of care therapy or ineligible or refused other existing treatment options * Must have progressed during or after last therapy 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 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 conditioning chemotherapy * 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

Study Info

Organization

Poseida Therapeutics, Inc.


Primary Outcome

Determine the maximum tolerated dose (MTD) and/or recommended phase 2 dose (RP2D) of P-MUC1C-ALLO1


Outcome Timeframe Baseline through Day 28

NCTID NCT05239143

Phases PHASE1

Primary Purpose TREATMENT

Start Date 2022-02-15

Completion Date 2026-04

Enrollment Target 100

Interventions

BIOLOGICAL P-MUC1C-ALLO1 CAR-T cells

DRUG Rimiducid

Locations Recruiting

Cedars Sinai Medical Center

United States, California, Los Angeles


University of California, San Diego

United States, California, San Diego


University of California, San Francisco

United States, California, San Francisco


Sarah Cannon Research Institute at HealthONE

United States, Colorado, Denver


University of Iowa Hospitals and Clinics

United States, Iowa, Iowa City


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