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NCT04483778 · ClinicalTrials.gov registry record · Phase 1
B7H3 CAR T Cell Immunotherapy for Recurrent/Refractory Solid Tumors in Children and Young Adults
A Phase 1 study of Osteosarcoma and Rhabdomyosarcoma, sponsored by Seattle Children's Hospital.
- Active
- Registry status
- Phase 1
- Development phase
- 68
- Enrollment target
- 1
- Study location
NCT04483778: Active Phase 1 study of Osteosarcoma and Rhabdomyosarcoma, sponsored by Seattle Children's Hospital.
NCT04483778 is a Phase 1 study of Osteosarcoma and Rhabdomyosarcoma that is active but no longer recruiting, run by Seattle Children's Hospital. The registered enrollment target is 68 participants, below the 300-participant average among 46 other Osteosarcoma trials with a reported enrollment target (77% lower). The trial reports 1 study location across 1 state. According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT04483778, a Phase 1 study of Osteosarcoma and Rhabdomyosarcoma, is active but no longer recruiting, sponsored by Seattle Children's Hospital.
- ACTIVE NOT RECRUITING
- Registry status
- Phase 1
- Development phase
- 68 participants
- Enrollment target
- 1
- Study location
Study Summary
This is a phase I, open-label, non-randomized study that will enroll pediatric and young adult research participants with relapsed or refractory non-CNS solid tumors to evaluate the safety, feasibility, and efficacy of administering T cell products derived from the research participant's blood that have been genetically modified to express a B7H3-specific receptor (chimeric antigen receptor, or CAR) that will target and kill solid tumors that express B7H3. On Arm A of the study, research participants will receive B7H3-specific CAR T cells only. On Arm B of the study, research participants will receive CAR T cells directed at B7H3 and CD19, a marker on the surface of B lymphocytes, following the hypothesis that CD19+ B cells serving in their normal role as antigen presenting cells to T cells will promote the expansion and persistence of the CAR T cells. Arm A CAR T cells include the protein EGFRt and Arm B CAR T cells include the protein HER2tG. These proteins can be used to both track and destroy the CAR T cells in case of undue toxicity. The primary objectives of the study will be to determine the feasibility of manufacturing the cell products, the safety of the T cell product infusion, to determine the maximum tolerated dose of the CAR T cells products, to describe the full toxicity profile of each product, and determine the persistence of the modified cell in the participant's body on each arm. Participants will receive a single dose of T cells comprised of two different subtypes of T cells (CD4 and CD8 T cells) felt to benefit one another once administered to the research participants for improved potential therapeutic effect. The secondary objectives of this protocol are to study the number of modified cells in the patients and the duration they continue to be at detectable levels. The investigators will also quantitate anti-tumor efficacy on each arm. Participants who experience significant and potentially life-threatening toxicities (other than clinically man
Primary Outcome
Type, frequency, severity, and duration of adverse events will be tabulated and summarized
Conditions Studied
Interventions
- DRUG Pembrolizumab
- BIOLOGICAL second generation 4-1BBζ B7H3-EGFRt-DHFR
- BIOLOGICAL second generation 4-1BBζ B7H3-EGFRt-DHFR(selected) and a second generation 4-1BBζ CD19-Her2tG
Study Locations (1)
Washington
- Seattle Children's Hospital - Seattle
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 68 participants |
| Start Date | 2020-07-13 |
| Est. Completion | 2040-12 |
| Phase | Phase 1 |
What the registry record for NCT04483778 still lists
NCT04483778 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 68 participants, a relatively small participant target, below the 300-participant average among 46 other Osteosarcoma trials with a reported enrollment target (77% lower).
The record links to 10 conditions, with Osteosarcoma appearing as the primary indexed condition, and to 3 interventions - of which Pembrolizumab is the first listed.
NCT04483778 reports a single indexed study location in Washington.
Frequently Asked Questions
What is clinical trial NCT04483778 about?
NCT04483778 is a clinical study titled "B7H3 CAR T Cell Immunotherapy for Recurrent/Refractory Solid Tumors in Children and Young Adults". This is a phase I, open-label, non-randomized study that will enroll pediatric and young adult research participants with relapsed or refractory non-CNS solid tumors to evaluate the safety, feasibility, and efficacy of administering T cell products derived from the research participant's blood that ...
What is the current status of trial NCT04483778?
This trial is currently active not recruiting. It is a Phase 1 study. The enrollment target is 68 participants. The study started on 2020-07-13. Estimated completion is 2040-12.
What conditions does trial NCT04483778 study?
This clinical trial studies the following conditions: Osteosarcoma, Rhabdomyosarcoma, Carcinoma, Ewing Sarcoma, Germ Cell Tumor.
What interventions are being tested in trial NCT04483778?
The interventions under investigation include: Pembrolizumab (DRUG), second generation 4-1BBζ B7H3-EGFRt-DHFR (BIOLOGICAL), second generation 4-1BBζ B7H3-EGFRt-DHFR(selected) and a second generation 4-1BBζ CD19-Her2tG (BIOLOGICAL).
Who is sponsoring clinical trial NCT04483778?
This trial is sponsored by Seattle Children's Hospital, which has 168 total clinical trials registered on ClinicalTrials.gov.
Where is trial NCT04483778 being conducted?
This trial has 1 study location across Washington. Contact the study sites directly through ClinicalTrials.gov for enrollment availability.
Learn More About Clinical Trials
Similar trials for Osteosarcoma
Matched on the same primary condition, ranked to surface studies in the same phase first, then by recruiting status, no relevance scoring or editorial curation.
Where NCT04483778's enrollment target sits among peer trials
68 14th of 46 higher than 33 of 46 other Osteosarcoma trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Osteosarcoma trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
-
Silmitasertib (CX-4945) in Combination With Chemotherapy for Relapsed Refractory Solid Tumors
RECRUITING · Phase 1
-
B7-H3-Specific Chimeric Antigen Receptor Autologous T-Cell Therapy for Pediatric Patients With Solid Tumors (3CAR)
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-
Alpha/Beta CD19+ Depleted Haploidentical Transplantation + Zometa for Pediatric Hematologic Malignancies and Solid Tumors
RECRUITING · Phase 1
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Losartan + Sunitinib in Treatment of Osteosarcoma
RECRUITING · Phase 1
-
Autologous B7-H3 Chimeric Antigen Receptor T Cells in Relapsed/Refractory Solid Tumors
RECRUITING · Phase 1
-
Study of CRX100 as Monotherapy and in Combination With Pembrolizumab in Patients With Advanced Solid Malignancies
RECRUITING · Phase 1
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