Immunotherapy for Solid Tumor Malignancies in Pediatrics Using Interleukin-15 and -21 Armored Glypican-3-specific Chimeric Antigen Receptor T Cells
Seattle Children's Hospital
21 participants
Dec 22, 2025
INTERVENTIONAL
Conditions
Summary
This Phase 1, open-label, non-randomized study will enroll pediatric and young adult subjects with relapsed or refractory non-central nervous system (CNS) malignant solid tumors expressing glypican-3 (GPC3) to examine the safety, feasibility, and efficacy of administering T cell products derived from peripheral blood mononuclear cells (PBMC) that have been genetically modified to co-express a GPC3-specific chimeric antigen receptor (CAR), interleukin (IL)-15 and IL-21 as well as the inducible caspase 9 (iC9) suicide gene (SC-CAR.GPC3xIL15.21 T cells). A child or young adult meeting all eligibility criteria and meeting none of the exclusion criteria will have a blood sample collected, which will be used to bioengineer the CAR T cells targeting their tumor.
Eligibility
Inclusion Criteria20
- Procurement Eligibility
- Diagnosis of a solid tumor expressing GPC3
- Lansky or Karnofsky score of \>=60%
- Life expectancy of \>16 weeks
- Informed consent explained to, understood by and signed by patient/guardian.
- For patients with hepatocellular carcinoma only:
- Barcelona Liver Cancer Stage A, B or C
- Child-Pugh Turcotte Score \<7
- Lansky or Karnofsky score of \>=60%
- Life expectancy of \>16 weeks
- Informed consent explained to, understood by and signed by patient/guardian.
- Adequate organ function
- Adequate laboratory values
- Refractory or relapsed disease after treatment with up- front therapy and at least one salvage treatment cycle
- 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 12 months after the T-cell infusion.
- Informed consent explained to, understood by and signed by patient/guardian.
- For patients with hepatocellular carcinoma only:
- Barcelona Liver Cancer Stage A, B or C
- Child-Pugh Turcotte Score \<7
Exclusion Criteria15
- History of hypersensitivity reactions to murine protein-containing products OR presence of human anti-mouse antibody (HAMA) prior to enrollment for 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)
- Treatment eligibility
- History of hypersensitivity reactions to murine protein-containing products OR presence of human anti-mouse antibody (HAMA) prior to enrollment for patients who have received prior therapy with murine antibodies.
- History of organ transplantation
- Known HIV positivity
- Active autoimmune or inflammatory disorder
- Live vaccines within 30 days prior to enrollment
- • Active bacterial, fungal, or viral infection (except Hepatitis B or Hepatitis C virus infections)
- Pregnancy or lactation
- Uncontrolled infection
- Systemic steroid treatment (≥ 0.5 mg prednisone equivalent/kg/day, dose adjustment or discontinuation of medication must occur at least 24hrs prior to CAR T cell infusion)
- Congestive heart failure (as defined by New York Heart Association Functional Classification III or IV), unstable angina, serious uncontrolled cardiac arrhythmia, a myocardial infarction within 6 months prior to study entry or a history of myocarditis.
Interventions
Autologous SC-CAR.GPC3xIL15.21 T cell products infusion
Locations(1)
View Full Details on ClinicalTrials.gov
For the most up-to-date information, visit the official listing.
NCT07148050