Glypican 3-specific Chimeric Antigen Receptor Expressed in T Cells for Patients With Pediatric Solid Tumors (GAP)

• Status: Recruiting
• Trial end date: 2037-02-01
• Target enrollment: 0
• Participant gender: All

Summary

This study enrolls patients who have GPC3-positive solid tumors currently. Patients may be considered if the cancer has come back, has not gone away after standard treatment or the patient cannot receive standard treatment. This research study uses special immune system cells called GAP T cells, a new experimental treatment.

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 patients with cancers. They have shown promise, but have not been strong enough to cure most patients.

Investigators have found from previous research that they can put a new gene into T cells that will make them recognize cancer cells and kill them. In preclinical studies, the investigators made several genes called a chimeric antigen receptor (CAR), from an antibody called GC33 that recognizes glypican-3, a proteoglycan found on solid tumors including pediatric liver cancers (GPC3-CAR). This study will test T cells genetically engineered with a GPC3-CAR (GAP T cells) in patients with GPC3-positive solid tumors (currently only enrolling liver tumors).

The GAP T cells are an investigational product not approved by the Food and Drug Administration.

The purpose of this study is to find the biggest dose of GAP T cells that is safe, to see how long they last in the body, to learn what the side effects are and to see if the GAP T cells will help people with GPC3-positive solid tumors. This study enrolls patients who have GPC3-positive solid tumors (currently only enrolling liver tumors).

• Phase: Phase 1
• Accepts Healthy Volunteers?: No

Details

• Lead Sponsor: Baylor College of Medicine
• Collaborators: Cancer Prevention Research Institute of Texas; Center for Cell and Gene Therapy, Baylor College of Medicine; Cookies for Kids' Cancer; Curing Kids' Cancer Foundation; Texas Children's Hospital; The V Foundation
• Treatments: Cyclophosphamide; Fludarabine; Fludarabine phosphate

Criteria

Procurement Eligibility

Inclusion Criteria:

• Relapsed or refractory GPC3-positive* solid tumors (currently only enrolling liver tumors)

• Age ≥ 1 year and ≤ 21 years

• Lansky or Karnofsky score ≥60%

• Life expectancy ≥16 weeks

• Child-Pugh-Turcotte score <7 (for patients with hepatocellular carcinoma only)

• Informed consent explained to, understood by and signed by patient/guardian. Patient/guardian given copy of informed consent

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)

• Severe previous toxicity from cyclophosphamide or fludarabine

Treatment Eligibility

Inclusion Criteria:

• Age ≥ 1 year and ≤ 21 years

• Barcelona Clinic Liver Cancer Stage A, B or C (for patients with hepatocellular carcinoma only)

• Life expectancy of ≥ 12 weeks

• Lansky or Karnofsky score ≥ 60%

• Child-Pugh-Turcotte score < 7 (for patients with hepatocellular carcinoma only)

• Adequate organ function:

• Creatinine clearance as estimated by Cockcroft Gault or Schwartz ≥ 60 ml/min

• serum AST< 5 times ULN

• total bilirubin < 3 times ULN for age

• INR ≤1.7 (for patients with hepatocellular carcinoma only)

• absolute neutrophil count > 500/microliter

• platelet count > 25,000/microliter (can be transfused)

• 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

Exclusion Criteria

• Pregnancy or lactation

• Uncontrolled infection

• Systemic steroid treatment (greater than or equal to 0.5 mg prednisone equivalent/kg/day, dose adjustment or discontinuation of medication must occur at least 24 hours prior to CAR T cell infusion)

• Known HIV positivity

• Active bacterial, fungal or viral infection (except Hepatitis B or Hepatitis C virus infections)

• 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)

• Severe previous toxicity from cyclophosphamide or fludarabine

GPC3 expression will be evaluated by standard immunohistochemistry (IHC). A tumor is considered GPC3 positive, when the staining is Grade 2 (>25% positive tumor cells) or above with an intensity score of 2 or above on a scale of 0 to 4.