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Clinical Trials/NCT06964737
NCT06964737RecruitingPhase 1

A Phase I, Dose-Escalation Trial of Anti-GARP Chimeric Antigen Receptor-T Cell Therapy in Patients With Recurrent High-Grade Glioma Treated at a Single Medical Center

Ohio State University Comprehensive Cancer Center2 sites in 1 country30 target enrollmentStarted: May 21, 2025Last updated:
Interventions
Drugs

Trial Snapshot

Phase
Phase 1
Status
Recruiting
Enrollment
30
Locations
2
Primary Endpoint
Dose limiting toxicities

Study Overview

Brief Summary

This phase I trial tests the safety, side effects, and best dose of anti-glycoprotein-A repetitions predominant (GARP) chimeric antigen receptor (CAR) T cell therapy and how well it works in treating patients with grade III or IV gliomas that have come back after a period of improvement (recurrent). 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, such as GARP, on the patient's tumor cells is added to the T cells in the laboratory. The special receptor is called a CAR. Large numbers of the CAR T cells are grown in the laboratory and given to the patient by infusion for treatment of certain tumors. Giving anti-GARP CAR T cell therapy may be safe, tolerable, and/or effective in treating patients with recurrent grade III or IV gliomas.

Detailed Description

PRIMARY OBJECTIVE:

I. To assess the safety and feasibility of a CAR T targeting GARP for glioma by defining rate, frequency, and severity of dose limiting toxicities (DLT) following intracavity administration to patients with recurrent glioma, to determine recommended phase II dose (RP2D).

SECONDARY OBJECTIVES:

I. To describe the adverse event profile of anti-GARP CAR T cell therapy. II. To describe the cytokine levels and immunophenotype in cerebrospinal fluid (CSF) during and following anti-GARP CAR T cell therapy.

III. To describe the duration of anti-GARP CAR T cell persistence and phenotype in CSF.

Study Design

Study Type
Interventional
Allocation
Na
Intervention Model
Single Group
Primary Purpose
Treatment
Masking
None

Eligibility Criteria

Ages
18 Years to — (Adult, Older Adult)
Sex
All
Accepts Healthy Volunteers
No

Inclusion Criteria

  • Patients are ≥ 18 years old
  • Capacity to understand and willingness to provide written informed consent
  • Diagnosis or clinical suspicion of recurrent malignant glioma, including:
  • History of high-grade glioma (World Health Organization [WHO] grade III or IV), or
  • Prior, histologically-confirmed diagnosis of grade II glioma with new radiographic findings consistent with a high-grade glioma
  • Imaging and/or histopathological confirmation of recurrent disease, or verification of "high risk" histology confirmed by a biopsy with measurable disease by the Radiologic Assessment in Neuro-Oncology (RANO) criteria
  • Patient has unifocal disease in one hemisphere and is supratentorial. Lesion and edema can not be located in eloquent locations (e.g., brainstem, pre-/post-central gyrus, visual cortex) or within 2 gyri of motor strip.
  • If on steroids such as dexamethasone, must be on a low dose (≤ 4mg per day) at the time of treatment, and not at an ascending dosage schedule at time of enrollment/leukapheresis
  • Prior to apheresis and treatment 1 a 2- week washout should be observed
  • Subjects must not have received bevacizumab therapy and are not planned to start such therapy
  • Karnofsky performance score (KPS) ≥ 60
  • Subject is a surgical candidate for surgery for malignant glioma with the intent of resecting >80-90% of the tumor as the ideal treatment option
  • White blood cells (WBC) > 4,000 cells/uL
  • Hemoglobin (Hgb) > 7 gm/dL
  • Platelets (Plt) > 100/dL
  • Serum creatinine ≤ 1.5 x institutional upper limit of normal
  • Liver function tests within 1.5 x institutional upper limit of normal
  • Women of reproductive potential must have a negative pregnancy test within 7 days of study start. All patients of reproductive potential must use a physician-approved contraceptive and refrain from sperm donation for at least two weeks prior, during, and six months after final T cell infusion. Women must refrain from breastfeeding for six months after final T cell infusion
  • Sufficient venous access, to be confirmed prior to apheresis
  • Life expectancy of greater than 12 weeks
  • PI clinical judgement of patients who will likely complete the trial and are able to maintain stable neurologic symptoms during intervention period

Exclusion Criteria

  • Patients who have a history of malignancy other than the glioma under investigation in this study, except patients with the following malignancies/treatment characteristics, who are eligible at the investigator's discretion:
  • Patients with a history of malignancy that has been treated with curative intent at least 2 years prior to screening and with no evidence of relapse, if no concurrent anti-cancer therapy (except hormonal therapy) is being given
  • Patients with a history of malignancy with a negligible risk of metastasis or death (e.g., 5-year OS rate > 90%) such as adequately treated carcinoma in situ of the cervix, non-melanoma skin carcinoma, localized prostate cancer, ductal carcinoma in situ, or stage I uterine cancer
  • Patients who have prostate cancer with no evidence of metastatic disease and are not on active therapy, except anti-androgen therapy
  • History of autoimmune disease, or other diseases require long-term administration of high-dose steroids [> 10 mgs/day] or immunosuppressive therapies
  • Research participants who received steroids must have either received their last dose of steroids 7 days or more prior to apheresis or have dosage tapered to < 2mg/kg/day
  • Patients being treated concurrently (within 14 days prior to study enrollment) with any other investigational agent
  • Examples of other investigational agents that would be exclusionary include supportive care agents
  • Patients receiving anti-cancer agents such as chemotherapy (e.g., temozolomide) must stop treatment 14 days prior to undergoing apheresis and remain off therapy throughout the duration of CAR T therapeutic intervention
  • Patients with active fungal, bacterial, viral, or other infection that requires intravenous antimicrobials
  • Prophylactic antimicrobials are allowed
  • Patients with active invasive fungal infection should be excluded even if the treatment is oral antimicrobials
  • History of allergy to study products/diluents/emulsions
  • Recent history (within last 3 months) of uncontrolled seizures

Arms & Interventions

Treatment (anti-GARP CAR T cell)

Experimental

Patients undergo apheresis on day -14 and undergo surgery and placement of CSF reservoir on day 0. Patients receive anti-GARP CAR T intracavitary infusion on day 14, 21, 28, 35 and 42 in the absence of disease progression or unacceptable toxicities. Additionally, patients undergo ECHO or MUGA at screening and collection of CSF and blood samples, lumbar puncture, chest x-ray and MRI throughout the study.

Intervention: Biospecimen Collection (Procedure)

Treatment (anti-GARP CAR T cell)

Experimental

Patients undergo apheresis on day -14 and undergo surgery and placement of CSF reservoir on day 0. Patients receive anti-GARP CAR T intracavitary infusion on day 14, 21, 28, 35 and 42 in the absence of disease progression or unacceptable toxicities. Additionally, patients undergo ECHO or MUGA at screening and collection of CSF and blood samples, lumbar puncture, chest x-ray and MRI throughout the study.

Intervention: Anti-GARP Chimeric Antigen Receptor-T Cells (Biological)

Treatment (anti-GARP CAR T cell)

Experimental

Patients undergo apheresis on day -14 and undergo surgery and placement of CSF reservoir on day 0. Patients receive anti-GARP CAR T intracavitary infusion on day 14, 21, 28, 35 and 42 in the absence of disease progression or unacceptable toxicities. Additionally, patients undergo ECHO or MUGA at screening and collection of CSF and blood samples, lumbar puncture, chest x-ray and MRI throughout the study.

Intervention: Chest Radiography (Procedure)

Treatment (anti-GARP CAR T cell)

Experimental

Patients undergo apheresis on day -14 and undergo surgery and placement of CSF reservoir on day 0. Patients receive anti-GARP CAR T intracavitary infusion on day 14, 21, 28, 35 and 42 in the absence of disease progression or unacceptable toxicities. Additionally, patients undergo ECHO or MUGA at screening and collection of CSF and blood samples, lumbar puncture, chest x-ray and MRI throughout the study.

Intervention: Echocardiography Test (Procedure)

Treatment (anti-GARP CAR T cell)

Experimental

Patients undergo apheresis on day -14 and undergo surgery and placement of CSF reservoir on day 0. Patients receive anti-GARP CAR T intracavitary infusion on day 14, 21, 28, 35 and 42 in the absence of disease progression or unacceptable toxicities. Additionally, patients undergo ECHO or MUGA at screening and collection of CSF and blood samples, lumbar puncture, chest x-ray and MRI throughout the study.

Intervention: Magnetic Resonance Imaging (Procedure)

Treatment (anti-GARP CAR T cell)

Experimental

Patients undergo apheresis on day -14 and undergo surgery and placement of CSF reservoir on day 0. Patients receive anti-GARP CAR T intracavitary infusion on day 14, 21, 28, 35 and 42 in the absence of disease progression or unacceptable toxicities. Additionally, patients undergo ECHO or MUGA at screening and collection of CSF and blood samples, lumbar puncture, chest x-ray and MRI throughout the study.

Intervention: Multigated Acquisition Scan (Procedure)

Treatment (anti-GARP CAR T cell)

Experimental

Patients undergo apheresis on day -14 and undergo surgery and placement of CSF reservoir on day 0. Patients receive anti-GARP CAR T intracavitary infusion on day 14, 21, 28, 35 and 42 in the absence of disease progression or unacceptable toxicities. Additionally, patients undergo ECHO or MUGA at screening and collection of CSF and blood samples, lumbar puncture, chest x-ray and MRI throughout the study.

Intervention: Pheresis (Procedure)

Treatment (anti-GARP CAR T cell)

Experimental

Patients undergo apheresis on day -14 and undergo surgery and placement of CSF reservoir on day 0. Patients receive anti-GARP CAR T intracavitary infusion on day 14, 21, 28, 35 and 42 in the absence of disease progression or unacceptable toxicities. Additionally, patients undergo ECHO or MUGA at screening and collection of CSF and blood samples, lumbar puncture, chest x-ray and MRI throughout the study.

Intervention: Surgical Procedure (Procedure)

Outcomes

Primary Outcomes

Dose limiting toxicities

Time Frame: Up to 30 days after the first dose

The rate, frequency and severity will be defined using Common Terminology Criteria for Adverse Events (CTCAE) version (v) 5. Will be summarized by descriptive statistics. The maximum grade for each type of toxicity will be recorded for each patient, and frequency tables will be reviewed to determine toxicity patterns.

Secondary Outcomes

  • Incidence of adverse events(Up to 30 days after last dose of study drug)
  • Cytokine levels and immunophenotype in cerebrospinal fluid (CSF)(During and following therapy, assessed up to 15 years)
  • Duration of anti-glycoprotein-A repetitions predominant (GARP) chimeric antigen receptor (CAR) T cell persistence and phenotype in CSF(Up to 15 years)
  • Objective response rate (ORR)(Up to 15 years)
  • Progression-free survival (PFS)(From initiation of therapy to the time of progression or death, assessed up to 15 years)
  • Overall survival (OS)(From initiation of therapy to death, assessed up to 15 years)
  • Correlation of GARP expression levels with outcomes(At pre- and post-treatment, assessed up to 24 months)
  • Frequency and phenotype of anti-GARP CAR T cells in tumor tissue(At progression, assessed up to 15 years)

Investigators

Sponsor Class
Other
Responsible Party
Principal Investigator
Principal Investigator

James Elder

Principal Investigator

Ohio State University Comprehensive Cancer Center

Study Sites (2)

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