NCT06815432 · Baylor College of Medicine
GPC-3 CAR T CELLS FOR Recurrent GPC-3 Positive Glioblastoma
What this study is about
The body has different ways of fighting infection and disease. No single way seems perfect for fighting cancers. This research study combines two different ways of fighting cancer: antibodies and T cells. Antibodies are types of proteins that protect the body from infectious diseases and possibly cancer.
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The body has different ways of fighting infection and disease. No single way seems perfect for fighting cancers. This research study combines two different ways of fighting cancer: antibodies and T cells. Antibodies are types of proteins that protect the body from infectious diseases and possibly cancer. T-cells, also called T lymphocytes, are special infection-fighting blood cells that can kill other cells, including cells infected with viruses and tumor cells. Both antibodies and T cells have been used to treat participants with cancers. They have shown promise, but have not been strong enough to cure most participants. The study team has found from previous research that we can put a new gene (a tiny part of what makes-up DNA and carries the participants traits) into T cells that will make them recognize cancer cells and kill them. In the lab, the study team has made several genes called a chimeric antigen receptor (CAR), from an antibody called GC33. The antibody GC33 recognizes a protein found on the participants brain tumor. This CAR is called GPC3-CAR. To make this CAR more effective, the study has also added a gene that includes IL15. IL15 is a protein that helps CAR T cells grow better and stay in the blood longer so that they may kill tumors better. The mixture of GPC3-CAR and IL15 killed tumor cells better in the laboratory when compared with CAR T cells that did not have IL15. This study will test T cells with the IL15 GPC3-CAR (GO-CART T cells) in participants with GPC3-positive brain tumors. T cells made to carry a gene called iCasp9 can be killed when they encounter a specific drug called AP1903. The study team will insert the iCasp9 and IL15 together into the T cells using a virus that has been made for this study. The drug (AP1903) is an experimental drug that has been tested in humans with no bad side-effects. The study team will use this drug to kill the T cells if necessary due to side effects. This study will test T cells genetically engineered with a GPC3-CAR and IL15 (GO-CART T cells) in participants with GPC3-positive brain tumors. The GO-CART T cells are an investigational product not approved by the Food and Drug Administration.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Diagnosis of GPC3-positive recurrent glioblastoma with previous resection planned for repeat resection.
- Age ≥18 years
- Karnofsky score ≥60%
- Informed consent explained to, understood by and signed by patient/guardian. Patient/guardian given copy of informed consent
- GPC3 expression (as determined by immunohistochemistry) with an extent score of ≥ Grade 2 (\>25% positive tumor cells) and an intensity score of ≥ 2 (scale 0-4). Procurement
Exclusion criteria
- History of hypersensitivity reactions to murine protein-containing products OR presence of human anti-mouse antibody (HAMA) prior to enrollment (only patients who have received prior therapy with murine antibodies).
- History of organ transplantation
- Known HIV positivity
- Active bacterial, fungal or viral infection (except Hepatitis B or Hepatitis C virus infections).
- Exhibits other risk factors of which administration of investigational agent is deemed not in the patient's best interest, in the opinion of the investigator Treatment Inclusion Criteria:
- Age ≥ 18 years
- Diagnosis of recurrent glioblastoma with previous resection
- Karnofsky score ≥ 60%-
- Stable neurologic exam for 7 days prior to enrollment
- Stable or decreasing dose of steroids over past 7 days prior to surgery and administration of therapy (max allowable dose is 0.1mg/kg dexamethasone or equivalent per day)
- Adequate organ function:
- Creatinine clearance as estimated by Cockcroft Gault or Schwartz ≥ 60 ml/min
- total bilirubin \< 3 times ULN for age
- absolute neutrophil count \> 500/μl
- platelet count \> 100,000/μl (can be transfused but must be achieved prior to enrollment)
- Hgb ≥ 7.0 g/dl (can be transfused)
- Pulse oximetry \>90% on room air
- Recovered from acute toxic effects of all prior chemotherapy and investigational agents before entering this study
- Sexually active patients must be willing to utilize one of the more effective birth control methods for 3 months after the T-cell infusion.
- Informed consent explained to, understood by and signed by patient/guardian. Patient/guardian given copy of informed consent. Treatment Exclusion Criteria:
- Pregnancy or lactation
- Uncontrolled infection
- Known HIV positivity
- Active bacterial, fungal or viral infection
- History of organ transplantation
- History of hypersensitivity reactions to murine protein-containing products OR presence of human anti-mouse antibody (HAMA) prior to enrollment (only patients who have received prior therapy with murine antibodies)
Where
- Houston, Texas
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jan 28, 2026 · Source of record for eligibility and locations