This is a single-center, single-arm phase I study to determine the safety and preliminary efficacy of autologous dendritic cells (DCs) loaded with multiple tumor neoantigen peptides administered as a cancer-treatment vaccine to treat adult postoperative patients with newly-diagnosed glioblastoma, in combination with the standard-of-care Temozolomide (TMZ) chemotherapy.
This is a single-center, single-arm phase I study to determine the safety and preliminary efficacy of autologous dendritic cells (DCs) loaded with multiple tumor neoantigen peptides administered as a cancer-treatment vaccination for the treatment of newly-diagnosed glioblastoma (GBM). The subjects are adult GBM patients who have undergone surgical resection. After the completion of TMZ concurrent chemoradiation, and, during conventional adjuvant TMZ chemotherapy, subjects will receive autologous DC vaccine treatments as scheduled. Ten subjects will be enrolled. The autologous genetic-modification-free DC cells will be loaded with multiple tumor neoantigen peptides and administered (i.d) to subjects. After 5 injections, the investigator will review subject's tolerance and compliance, and decide whether or not to administer more DC vaccines up to 8 injections. For certain patients with good tolerance and clinical response of the DC vaccine, peripheral blood is extracted after completion of TMZ adjuvant chemotherapy to assess patient's immune response. According to the result, investigators will be decided whether to perform more 1-2 treatment cycles (5-8 infections/cycle) to strengthen the effectiveness.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
11
Each dosage of Dendritic Cells (DC) vaccine contains 2-10 million DC cells, loaded with 5-20 tumor neoantigen peptides. DC vaccine will be administered (i.d) around lymph nodes of the groin and Axillary at 2nd, 3rd, 4th, 7th and 11th week after the completion of concurrent Temozolomide chemoradiation. After 5 injections, the investigator will review subject's tolerance and compliance; and, decide whether to administer more DC vaccines up to 8 injections. For certain patients with good tolerance and clinical response of the DC vaccine, peripheral blood is extracted after completion of Temozolomide adjuvant chemotherapy to assess the patient's immune response. According to the result, investigators will decide whether to perform 1-2 more treatment cycles (5-8 injections/cycle) to strengthen the effectiveness
Temozolomide is administered as the standard-of-care adjuvant chemotherapy, in combination with the DC vaccines to treat the enrolled patients.
Beijing Tiantan Hospital
Beijing, Beijing Municipality, China
Incidence of Treatment-Emergent Adverse Events (AEs)
AEs were graded according to the Common Terminology Criteria for Adverse Events (CTCAE) version 4.03.
Time frame: All the AEs were recorded from the first shot to 8 weeks after the last shot.
Proportions of patients with positive peripheral tumor specific immune response after the DC vaccinations
The peripheral tumor specific immune response is measured by the IFN-γ release ELISPOT assay, using the peripheral blood mononuclear cells (PBMCs) that are collected before the vaccine injection (baseline), one week after the 3r, 5th and the last injection, respectively. The positive response is defined as "≥ 55 spot-forming cells in each million PBMCs" or "number of spot-forming cells increase by 3-fold after the DC vaccination compared with the baseline".
Time frame: start from the inclusion timepoint to one week after the last injection.
Progression-free survival
months from the date of surgery to tumor recurrence or progression
Time frame: From date of surgery until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 60 months
Overall survival
months from the date of surgery to death
Time frame: From date of surgery until the date of death from any cause, assessed up to 60 months
Rate of the patients who survive for more than one year after surgery in all the included patients who receive the DC vaccine
One-year survival rate
Time frame: From date of surgery until one year after surgery
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