Autologous T Cells Lentivirally Transduced to Express L1CAM-Specific Chimeric Antigen Receptors in Treating Patients With Locally Advanced and Unresectable or Metastatic Small Cell Neuroendocrine Prostate Cancer

NCT06094842 | Withdrawn Phase 1 DMC FDA Drug

• 3 other identifiers: RG1123589NCI-2023-07464FH20229
• Study Type: interventional
• Target: N/A
• Locations: 1 country
• Sites: 1

Brief Summary

This phase I trial studies the side effects and best dose of autologous CD8+ and CD4+ lentivirally transduced to express L1CAM-specific chimeric antigen receptor (CAR) and EGFRt mutation specific T cells and to see how well they work in treating patients with small cell neuroendocrine prostate cancer (SCNPC) that has spread to nearby tissue or lymph nodes (locally advanced) and cannot be removed by surgery (unresectable) or has spread from where it first started (primary site) to other places in the body (metastatic). CAR T-cell therapy is a type of treatment in which a patient's T cells (a type of immune system cell) are changed in the laboratory so they will attack tumor cells. T cells are taken from a patient's blood. Then the gene for a special receptor that binds to a certain protein on the patient's tumor cells is added to the T cells in the laboratory. Some solid tumor cells have an L1CAM protein on their surface, and T cells can be modified with a receptor, called a chimeric antigen receptor (CAR), to help recognize this protein and kill these tumor cells. Large numbers of the CAR T cells are grown in the laboratory and given to the patient by infusion for treatment of certain cancers. These L1CAM mutation specific T cells may help the body's immune system identify and kill L1CAM locally advanced and unresectable or metastatic small cell neuroendocrine prostate cancers' tumor cells.

Conditions

Prostate Carcinoma; Prostate Small Cell Neuroendocrine Carcinoma; Stage III Prostate Cancer AJCC v8; Stage IV Prostate Cancer AJCC v8

Outcome Measures

Primary Outcomes (2)

• Incidence of adverse events

  The toxicities observed at each dose level will be summarized in terms of type (organ affected or laboratory determination such as absolute neutrophil count), severity (by National Cancer Institute \[NCI\] Common Terminology Criteria for Adverse Events \[CTCAE\] version 5.0 and nadir or maximum values for the laboratory measures), date of onset and attribution. Tables will be created to summarize these toxicities and side effects by dose level.

  Up to 12 months after last chimeric antigen receptor (CAR) T cell infusion

• Dose-limiting toxicity rates

  The toxicities observed at each dose level will be summarized in terms of type (organ affected or laboratory determination such as absolute neutrophil count), severity (by NCI CTCAE version 5.0 and nadir or maximum values for the laboratory measures), date of onset and attribution. Tables will be created to summarize these toxicities and side effects by dose level.

  Within 28 days of last CAR T cell infusion

Secondary Outcomes (3)

• Objective response

  Up to 12 months after last CAR T cell infusion

• Radiographic progression free survival

  Up to 12 months after last CAR T cell infusion

• Overall survival

  Up to 12 months after last CAR T cell infusion

Study Arms (1)

Treatment (autologous L1CAM-specific CAR+EGFRt+ T cells)

EXPERIMENTAL

Patients undergo leukapheresis to obtain PBMCs for T cell product manufacturing and may undergo bridging therapy at the discretion of the treating clinician on study. Patients then undergo lymphodepleting chemotherapy with cyclophosphamide IV and fludarabine IV on days -5, -4 and -33 or single agent bendamustine on days -4 and -3 at the discretion of the treating clinician and/or PI. Patients receive an autologous L1CAM-specific CAR+EGFRt+ T cells infusion on day 0. Based on disease response and persistence of CAR T cells, patients may receive additional lymphodepletion chemotherapy and an autologous L1CAM-specific CAR+EGFRt+ T cell infusion as soon as 6 weeks and no later than 24 weeks after the first infusion, or at the discretion of the PI. Patients also undergo ECHO or MUGA during screening. Patients undergo x-ray imaging, CT, bone scan, and blood sample collection throughout the trial. Additionally, patients may undergo tissue biopsy on the trial.

Drug: Bendamustine; Procedure: Biopsy; Procedure: Biospecimen Collection; Procedure: Bone Scan; Procedure: Bridge Therapy; Procedure: Computed Tomography; Drug: Cyclophosphamide; Procedure: Echocardiography; Drug: Fludarabine; Procedure: Leukapheresis; Procedure: Multigated Acquisition Scan; Biological: T-cell Receptor-engineered T-cells; Procedure: X-Ray Imaging

Interventions

Bendamustine DRUG

Given IV

Also known as: SDX-105

Treatment (autologous L1CAM-specific CAR+EGFRt+ T cells)

Biopsy PROCEDURE

Undergo tissue biopsy

Also known as: BIOPSY_TYPE, Bx

Treatment (autologous L1CAM-specific CAR+EGFRt+ T cells)

Biospecimen Collection PROCEDURE

Undergo blood sample collection

Also known as: Biological Sample Collection, Biospecimen Collected, Specimen Collection

Treatment (autologous L1CAM-specific CAR+EGFRt+ T cells)

Bone Scan PROCEDURE

Undergo bone scan

Also known as: Bone Scintigraphy

Treatment (autologous L1CAM-specific CAR+EGFRt+ T cells)

Bridge Therapy PROCEDURE

Undergo bridging therapy

Treatment (autologous L1CAM-specific CAR+EGFRt+ T cells)

Computed Tomography PROCEDURE

Undergo CT

Also known as: CAT, CAT Scan, Computed Axial Tomography, Computerized Axial Tomography, Computerized axial tomography (procedure), Computerized Tomography, CT, CT Scan, tomography

Treatment (autologous L1CAM-specific CAR+EGFRt+ T cells)

Cyclophosphamide DRUG

Given IV

Also known as: (-)-Cyclophosphamide, 2H-1,3,2-Oxazaphosphorine, 2-[bis(2-chloroethyl)amino]tetrahydro-, 2-oxide, monohydrate, Asta B 518, B-518, Carloxan, Ciclofosfamida, Ciclofosfamide, Cicloxal, Clafen, Claphene, CP monohydrate, CTX, CYCLO-cell, Cycloblastin, Cycloblastine, Cyclophospham, Cyclophosphamid monohydrate, Cyclophosphamide Monohydrate, Cyclophosphamidum, Cyclophosphan, Cyclophosphane, Cyclophosphanum, Cyclostin, Cyclostine, Cytophosphan, Cytophosphane, Cytoxan, Fosfaseron, Genoxal, Genuxal, Ledoxina, Mitoxan, Neosar, Revimmune, Syklofosfamid, WR- 138719, WR-138719

Treatment (autologous L1CAM-specific CAR+EGFRt+ T cells)

Echocardiography PROCEDURE

Undergo ECHO

Also known as: EC

Treatment (autologous L1CAM-specific CAR+EGFRt+ T cells)

Fludarabine DRUG

Given IV

Also known as: Fluradosa

Treatment (autologous L1CAM-specific CAR+EGFRt+ T cells)

Leukapheresis PROCEDURE

Undergo leukapheresis

Also known as: Leukocytopheresis, Therapeutic Leukopheresis

Treatment (autologous L1CAM-specific CAR+EGFRt+ T cells)

Multigated Acquisition Scan PROCEDURE

Undergo MUGA

Also known as: Blood Pool Scan, Equilibrium Radionuclide Angiography, Gated Blood Pool Imaging, Gated Heart Pool Scan, MUGA, MUGA Scan, Multi-Gated Acquisition Scan, Radionuclide Ventriculogram Scan, Radionuclide Ventriculography, RNVG, SYMA Scanning, Synchronized Multigated Acquisition Scanning

Treatment (autologous L1CAM-specific CAR+EGFRt+ T cells)

T-cell Receptor-engineered T-cells BIOLOGICAL

Given autologous L1CAM-specific CAR+EGFRt+ T cells IV

Also known as: T-cell Receptor-engineered T Cells, T-cell Receptor-engineered T-lymphocytes, TCR T Cells, TCR T-cells, TCR-engineered T-cells, TCR-modified T Cells

Treatment (autologous L1CAM-specific CAR+EGFRt+ T cells)

X-Ray Imaging PROCEDURE

Undergo chest x-ray

Also known as: Conventional X-Ray, Diagnostic Radiology, Medical Imaging, X-Ray, Plain film radiographs, Radiographic Imaging, Radiographic imaging procedure (procedure), Radiography, RG, Static X-Ray, X-Ray

Treatment (autologous L1CAM-specific CAR+EGFRt+ T cells)

Eligibility Criteria

• Age: 18 Years+
• Sex: male
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Participants must be ≥ 18 years of age
• Able to understand and give written informed consent
• Confirmation of small cell neuroendocrine prostate cancer (SCNPC) diagnosis by internal pathology review of initial or subsequent biopsy or other pathologic material at Fred Hutchinson Cancer Center/University of Washington
• Previously treated with a platinum-based chemotherapy regimen for SCNPC
• Participants may not have received prior therapy or plan to receive therapy (chemotherapy, immunotherapy and/or radiation therapy) or have undergone or plan to undergo major surgery within the last 3 weeks prior to leukapheresis AND initiation of lymphodepleting chemotherapy. Participants who have developed SCNPC in the context of prior androgen deprivation therapy (ADT) (i.e. medical/surgical castration) may continue on ADT at the discretion of their treating provider
• Evidence of L1CAM positivity by immunohistochemistry review of the patient's archival/fresh tumor samples
• Metastatic or locally advanced and unresectable disease
• Adequate performance status (Eastern Cooperative Oncology Group \[ECOG\] 0 or 1)
• Expected survival \> 3 months
• Fertile participants must be willing to use an effective contraceptive method before, during, and for at least 4 months after the CAR T cell infusion
• Measurable disease per RECIST v1.1 criteria as determined by CT, MRI or positron emission tomography (PET) scan
• Hemoglobin \> 9 g/dL (prior to leukapheresis)
• Absolute neutrophil count (ANC) \> 1,500 per mm\^3 (prior to leukapheresis)
• Platelets \> 100,000 per mm\^3 (prior to leukapheresis)
• Creatinine ≤ 1.5 x upper limit of normal (ULN) (prior to leukapheresis)

You may not qualify if:

• Participants with non-melanoma skin cancer are eligible, while participants with other prior malignancies must have had at least a 3-year disease-free interval
• Participants with active human immunodeficiency virus (HIV) (testing not required per protocol but status noted). Participants with adequately treated HIV will be permitted to enroll. Adequately treated HIV will be defined as being on a stable regimen of highly active anti-retroviral therapy (HAART), CD4 count ≥ 350 cells/mcL, undetectable viral load on standard polymerase chain reaction (PCR)-based testing and not requiring antibiotics or antifungal agents for the prevention of opportunistic infections
• Participants with active hepatitis B (defined as hepatitis B surface antigen \[HBsAg\] reactive) or known active hepatitis C virus (defined as HCV RNA is detected) infection. Participants with prior hepatitis B virus (HBV) infection are eligible. Participants with a history of hepatitis C virus (HCV) infection are eligible if they have been treated with curative intent and their hepatitis C PCR viral load is negative
• Known history of unstable angina or myocardial infarction (MI) within 6 months or clinically significant cardiac arrhythmia (other than stable atrial fibrillation) requiring anti-arrhythmia therapy
• New York Heart Association (NYHA) class III or IV congestive heart failure (CHF), clinically significant hypotension, uncontrolled symptomatic coronary artery disease, or a documented ejection fraction of \< 35%
• Known history of clinically significant active chronic obstructive pulmonary disease (COPD), or other moderate-to-severe chronic respiratory illness present within 6 months
• Participants with clinically significant pulmonary dysfunction, as determined by medical history and physical exam should undergo pulmonary function testing. Those with an forced expiratory volume (FEV1) of \< 50 % of predicted or diffusing capacity for carbon monoxide (DLCO) (corrected) \< 40% will be excluded. Patients with \> grade 1 dyspnea at rest or oxygen saturation \< 94% on room air (resting)
• Infection requiring intravenous antibiotic use within 2 weeks of leukapheresis or uncontrolled active infection
• Baseline serum sodium level \< 130 mEq/L
• Research participant is not receiving systemically administered steroid therapy. Physiologic glucocorticoid replacement therapy for management of adrenal insufficiency is allowed (≤ 10 mg daily of prednisone or equivalent)
• History of an autoimmune disease requiring immunosuppressant therapy within the past 5 years
• Other concurrent medical or psychiatric conditions that, in the investigator's opinion, may be likely to confound study interpretation or prevent completion of study procedures and follow-up examinations
• Known history of brain metastases.
• Note: Brain imaging is not required to determine eligibility. However, this should be performed if there is clinical suspicion for brain metastases

Sponsors & Collaborators

• Fred Hutchinson Cancer Center: lead
• Bristol-Myers Squibb: collaborator

Study Sites (1)

Fred Hutch/University of Washington Cancer Consortium

Seattle, Washington, 98109, United States

Location

MeSH Terms

Conditions

Prostatic Neoplasms

Interventions

Bendamustine Hydrochloride; Biopsy; Specimen Handling; Bridge Therapy; Cyclophosphamide; fludarabine; Leukapheresis; X-Rays; Phantoms, Imaging

Condition Hierarchy (Ancestors)

Genital Neoplasms, Male; Urogenital Neoplasms; Neoplasms by Site; Neoplasms; Genital Diseases, Male; Genital Diseases; Urogenital Diseases; Prostatic Diseases; Male Urogenital Diseases

Intervention Hierarchy (Ancestors)

Butyrates; Acids, Acyclic; Carboxylic Acids; Organic Chemicals; Nitrogen Mustard Compounds; Mustard Compounds; Hydrocarbons, Halogenated; Hydrocarbons; Benzimidazoles; Heterocyclic Compounds, 2-Ring; Heterocyclic Compounds, Fused-Ring; Heterocyclic Compounds; Cytodiagnosis; Cytological Techniques; Clinical Laboratory Techniques; Diagnostic Techniques and Procedures; Diagnosis; Diagnostic Techniques, Surgical; Surgical Procedures, Operative; Investigative Techniques; Therapeutics; Phosphoramide Mustards; Phosphoramides; Organophosphorus Compounds; Cytapheresis; Biological Therapy; Blood Component Removal; Leukocyte Reduction Procedures; Cell Separation; Electromagnetic Radiation; Electromagnetic Phenomena; Magnetic Phenomena; Physical Phenomena; Radiation; Radiation, Ionizing; Equipment and Supplies

Study Officials

• Michael Schweizer

  Fred Hutch/University of Washington Cancer Consortium

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: October 17, 2023
• First Posted: October 23, 2023
• Study Start: April 15, 2025
• Primary Completion (Estimated): March 15, 2028
• Study Completion (Estimated): March 15, 2028
• Last Updated: April 1, 2025

Record last verified: 2024-10

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)