This is an open-label phase 1 safety and feasibility study that will employ multi-tumor antigen specific cytotoxic T lymphocytes (TSA-T) directed against proteogenomically determined personalized tumor-specific antigens (TSA) derived from a patient's primary brain tumor tissues. Young patients with embryonal central nervous system (CNS) malignancies typically are unable to receive irradiation due to significant adverse effects and are treated with intensive chemotherapy followed by autologous stem cell rescue; however, despite intensive therapy, many of these patients relapse. In this study, individualized TSA-T cells will be generated against proteogenomically determined tumor-specific antigens after standard of care treatment in children less than 5 years of age with embryonal brain tumors. Correlative biological studies will measure clinical anti-tumor, immunological and biomarker effects.
Age range
1 Year – 30 Years
Sex
ALL
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To evaluate the safety of TSA-T in children, adolescents, and young adults with high-risk CNS embryonal tumors and recurrent ependymomas. Safety will be evaluated by the incidence of dose limiting toxicities (DLTs).
Timeframe: 42 days of the first TSA-T infusion
To estimate the maximum-tolerated dose (MTD) of intracerebroventricularly-administered TSA-T in children, adolescents and young adults with high-risk CNS embryonal tumors and recurrent ependymoma.
Timeframe: 42 days of the first TSA-T infusion
Feasibility of TSA identification
Timeframe: Up to 5 years after the first TSA-T cell infusion
Feasibility of TSA-T cell generation
Timeframe: At start of SOC/Salvage therapy until start of TSA-T cell treatment (up to 24 weeks)