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Clinical Trial Summary

This single-arm phase II study will assess the impact of tetanus pre-conditioning and adjuvant Granulocyte Macrophage Colony Stimulating Factor (GM-CSF) on overall survival of patients newly diagnosed with World Health Organization (WHO) Grade IV glioblastoma who have undergone definitive tumor resection, are cytomegalovirus (CMV) positive and unmethylated, and completed standard temozolomide (TMZ) and radiation treatment. After completion of the standard of care radiotherapy with concurrent TMZ, patients will receive 1 cycle of dose-intensified TMZ followed by pp65-loaded dendritic cell (DC) vaccination beginning on day 23.


Clinical Trial Description

Approximately 64 patients with resected, newly-diagnosed WHO Grade IV glioma who are CMV positive and in which the Methylguanine Methyltransferase (MGMT) is not methylated will be accrued to this study before standard of care radiation therapy (RT) and concurrent TMZ, with the goal of treating 48 patients with dose-intensified temozolomide and pp65 loaded dendritic cell vaccine after completion of standard RT and TMZ. All enrolled patients will undergo a leukapheresis for the generation of DCs. Patients will then receive approximately 6 weeks of the standard of care radiation therapy (RT) and concurrent TMZ at a standard targeted dose of 75 mg/m2/day. For patients whose initial leukapheresis yields less than 3 vaccines, repeat leukapheresis may be obtained. At the post-RT clinic visit, a single post-RT cycle of dose-intensified TMZ (100 mg/m2/day for 21 days) will be given. On day 23 (± 2 days) of the cycle, patients will receive the first of 3 pp65 DC vaccines. Vaccines #1-3 will be given every two weeks (± 2 days). All patients will receive up to a total of 10 DC vaccines, with vaccines administered every 35 days (± 7 days) after the third vaccine, given bilaterally at the groin site unless progression occurs with no further cycles of TMZ. DC vaccines will be given intradermally (i.d.) and divided equally to both inguinal regions. Before the first DC vaccination, patients will receive 0.5 mL of Td (tetanus and diphtheria toxoids adsorbed) intramuscularly into the deltoid muscle to ensure adequate immunity to the tetanus antigen. Patients will undergo leukapheresis again for immunologic monitoring with a specific assessment of baseline antigen-specific cellular and humoral immune responses if needed for further DC generations 14 (± 2) days after vaccine #3. Prior to pp65 DC vaccination #4,(3±1) weeks after leukapheresis 2, the vaccine site will receive a pre-conditioning intradermal injection of Td. Up to 16 patients will receive 111-Indium labeled DCs at the 4th vaccine followed by SPECT/CT imaging immediately, and at 1 and 2 days after injections. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT03927222
Study type Interventional
Source Duke University
Contact
Status Terminated
Phase Phase 2
Start date September 30, 2019
Completion date February 10, 2023

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