Glioblastoma Clinical Trial
Official title:
A Phase 1 Trial of CMV RNA-Pulsed Dendritic Cells With Tetanus-Diphtheria Toxoid Vaccine in Pediatric Patients and Young Adults With WHO Grade IV Glioma, Recurrent Malignant Glioma, or Recurrent Medulloblastoma
The purpose of this study is to determine the feasibility and safety of administering CMV RNA-pulsed dendritic cells (DCs), also known as CMV-DCs, to children and young adults up to 35 years old with nWHO Grade IV glioma, recurrent malignant glioma, or recurrent medulloblastoma. Evidence for efficacy will also be sought. This will be a phase 1 study evaluating CMV-DC administration with tetanus toxoid (Td) preconditioning and Granulocyte Macrophage-Colony Stimulating Factor (GM-CSF) adjuvant in children and young adults up to 35 years old with WHO grade IV glioma, recurrent malignant glioma, or recurrent medulloblastoma. This safety study will enroll a maximum of 10 patients.
Participants in this study will undergo a leukapheresis procedure in which blood is collected into a machine that removes white blood cells and then returns the remainder of the blood back to the individual. The white blood cells removed from the blood are used to make the participant's study vaccine. Newly diagnosed patients will undergo standard radiation therapy (RT) with or without temozolomide after leukapheresis. If a patient has been diagnosed with a Grade IV glioma or recurrence of either malignant glioma or medulloblastoma, the study doctor may recommend "bridge therapy" after leukapheresis. Bridge therapy is approved or standard therapy for the tumor intended to bridge the time without the study drugs, dose-intensified temozolomide (DI-TMZ) or CMV-DC vaccine. All participants will undergo a cycle of "dose-intensified" temozolomide. Participants will receive Td pre-conditioning given as a shot in the right leg, six to 24 hours before receiving their 1st vaccine, which is also given as shots in the legs. If more than one vaccine is made, vaccines #2 and #3 will occur at 2-week intervals after the 1st vaccine. After the 3rd vaccine, there will be 4 weeks between vaccines for as many vaccines as the study team can prepare from the participant's leukapheresis. Please note data collection will continue to occur outside of the defined primary outcomes for 2 exploratory objectives- describing changes in T cell response to CMV-DC vaccination and describing overall and progression-free survival of patients enrolled on the study. The percent change in pp65-specific T cell responses will be calculated from a pre-chemotherapy baseline, post-chemotherapy baseline, 1 week after Vaccine #3, and 1 week after final vaccine. Progression-free survival is defined as the time between starting DI TMZ and disease progression. Patients will be followed for overall survival for up to 3 years. ;
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