Immune Modulatory DC Vaccine Against Brain Tumor
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|ClinicalTrials.gov Identifier: NCT03914768|
Recruitment Status : Enrolling by invitation
First Posted : April 16, 2019
Last Update Posted : June 12, 2020
|Condition or disease||Intervention/treatment||Phase|
|Diffuse Intrinsic Pontine Glioma or Glioblastoma||Biological: Immunomodulatory DC vaccine to target DIPG and GBM||Phase 1|
Diffuse intrinsic pontine glioma (DIPG) or glioblastoma (GBM) is an aggressive malignancy. DIPG mainly occurs in the ventral pontine of childhood. The overall median survival time is 9 to 11 months. The 2-year survival rate is less than 10%. Thus DIPG has become one of the most fatal diseases in children. These tumors invade and infiltrate the surrounding brain, making complete surgical excision impossible. Several studies focused on the identification of GBM or DIPG-specific antigens and evaluated their potential for vaccine application. Immunomodulatory DC vaccines based on ex vivo genetic modifications in combination with known tumor-specific antigens may substantially enhance the activation potential of tumor-specific T cells with improved benefit to patients.
Although certain antigens are highly specific in DIPG or GBM, existing immune tolerance suppresses anti-tumor immunity in cancer patients. To induce anti-cancer immune response in patients, ex vivo modification of immune modulatory antigens or immune cells will be necessary. Advanced whole exome sequencing has been developed to identify specific mutations in tumors and predict best-fit MHC-specific neoepitopes for T cell activation. In this study we will investigate novel DC vaccines based on autologous DCs pulsed with genetically modified tumor cells or related antigens such as neoantigens to induce a strong anti-tumor immunity. Early studies of DC-based vaccines targeting gliomas have shown acceptable safety and low toxicity profile. This is a multi-center randomized Phase I study to evaluate safety of novel DC vaccines.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||10 participants|
|Intervention Model:||Single Group Assignment|
|Intervention Model Description:||Patients with DIPG or GBM will be treated with immunomodulatory DC vaccine|
|Masking:||None (Open Label)|
|Official Title:||Immune Modulatory DC Vaccine Against Diffuse Intrinsic Pontine Glioma (DIPG) and Glioblastoma (GBM)|
|Actual Study Start Date :||March 31, 2019|
|Estimated Primary Completion Date :||January 31, 2021|
|Estimated Study Completion Date :||December 31, 2022|
Experimental: Immunomodulatory DC vaccine to target DIPG and GBM
Patients will receive immune modulatory treatment consisting of cyclophosphamide (200 mg/m2) and bevacizumab (15 mg/kg), before and after DC vaccine injection, respectively.
Biological: Immunomodulatory DC vaccine to target DIPG and GBM
This study will inject DC vaccine cells near lymphoid tissue close to the tumor. The patient will receive intravenous cyclophosphamide (200 mg/m2) or oral (cytoxan) before the vaccine, followed by DC vaccine and intravenous bevacizumab (15 mg/kg) the next day. The cells will be repeatedly infused every month for six consecutive months depending on the response and the condition of the patient. The amount of DC vaccine cells per injection is based on prior report at 5-10x106. An initial dose escalation scheme will be imposed.
- Safety of infusion of autologous immunomodulatory DC Vaccine is assessed by the NCI CTCAE V4.0 criteria. [ Time Frame: 2 years ]Safety of the vaccine will be assessed by monitoring for adverse events (AEs) based on scheduled laboratory assessments.
- Overall survival (OS) at 12 months (OS12). [ Time Frame: 12 months ]OS12 will be the clinical efficacy primary endpoint. For subjects who are still alive at 12 months, OS12 will be censored at the last contact date. OS will be estimated using the Kaplan-Meier method.
- Treatment response rate of DIPG or GBM [ Time Frame: 6 months] ]Defined as the proportion of patients who achieved complete remission (CR), partial remission (PR), stable disease (SD), or progressive disease (PD) based on brain MRI imaging analysis.
- Overall survival Rate [ Time Frame: 1 year follow up ]Percentage of participants with objective response as determined by the investigator based on Response Evaluation Criteria In Solid Tumors Version 1.1 (RECIST v1.1)
- Progression-free survival rate [ Time Frame: 1 years ]Progression-free Survival (PFS) as determined by the investigator based on RECIST v1.1
- ELISPOT or antigen specific functional assays for evaluation of antigen specific immune response in patients [ Time Frame: 1 year ]Tumor antigen specific immune response in the peripheral blood evaluated by ELISPOT or antigen specific functional assays.
- Magnetic resonance imaging for evaluation of disease progression and prognosis [ Time Frame: 1 years ]The prognosis of GBM or DIPG will be determined by MRI
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03914768
|Shenzhen Geno-immune Medical Institute|
|Shenzhen, Guangdong, China, 518000|
|Shenzhen Children's Hospital|
|Shenzhen, Guangdong, China, 518038|
|Department of Neurosurgery, Shenzhen Hospital, Southern Medical University|
|Shenzhen, Guangdong, China, 518100|
|Principal Investigator:||Lung-Ji Chang, PhD||Shenzhen Geno-Immune Medical Institute|