NCT04523688

Vaccination With Autologous Dendritic Cells Loaded With Autologous Tumour Homogenate in Glioblastoma

Vaccination With Autologous Dendritic Cells Loaded With Autologous Tumour Homogenate in Glioblastoma: a Phase II Study

• Status: Recruiting
• Phase: Phase 2
• Study type: Interventional
• Enrollment: 28 (estimated)
• Sponsor: Istituto Romagnolo per lo Studio dei Tumori Dino Amadori IRST S.r.l. IRCCS · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

Single arm, monocentric trial to assess the safety and the progression-free survival related to the combined treatment of dendritic cell vaccine loaded with autologous tumor homogenate and temozolomide in patients operated for glioblastoma and then treated with standard radiochemotherapy (according to Stupp regimen).

Detailed description

Single arm, monocentric trial to assess the safety and the progression-free survival related to the combined treatment of dendritic cell vaccine loaded with autologous tumor homogenate and temozolomide in patients operated for glioblastoma and then treated with standard radiochemotherapy (according to Stupp regimen). The experimental treatment consists of an induction phase with 4 weekly doses of dendritic cell vaccine (10x10exp6 cells) intradermally administered (weeks 1-4), followed by a maintenance phase consisting of 28 days cycles with vaccine administration (start on week 7) and adjuvant temozolomide (150-200mg/m2/day) assumed orally from day 1 to 5 q28 (start on week 5). The combined maintenance treatment will continue until disease progression, unacceptable toxicity or withdrawal of consent by the patient, or up to a maximum of 1 year of treatments. After disease progression or the end of maintenance phase, is foreseen a one-year follow-up phase for each subject. Primary objectives are clinical activity and safety of the study treatment. Secondary objectives are the evaluation of the prognostic role of the positive Delayed-Type Hypersensitivity (DTH) skin test after at least four vaccine administrations, the OS and the immunological efficacy of the study treatment. A series of exploratory objectives will be also assessed on samples from patients who participate to this optional part of the trial. Simon's two-stage design (Simon, 1989) will be used for the sample size calculation. A planned interim analysis will be done after the recruitment of the first 9 evaluable patients for toxicity and for efficacy. If study will not be stopped due to lack of safety or efficacy, a total of 28 evaluable patients will be enrolled for the trial. Time to events (PFS and OS) will be calculated with the Kaplan-Meier method and the analysis was performed on the eligible population. For the primary objective, the proportion of patients without progression at three months from leukapheresis date will be evaluated. The proportion of patients experiencing vaccine-related grade ≥ 3 adverse events (AEs) during the treatment will be inferred by means of the two-sided Clopper-Pearson, or a more appropriate one, 95% confidence interval. Descriptive statistics will be used to assess the extent of the secondary endpoints.

Conditions

• Glioblastoma
• Vaccination

Interventions

Type	Name	Description
BIOLOGICAL	Autologous Dendritic Cells (DC) vaccine	10×10exp6 autologous dendritic cells loaded with autologous tumour homogenate given by intradermal injection (day 1)
DRUG	Temozolomide	Adjuvant temozolomide assumed orally from day 1 to 5 (start on week 5). Dosage: 150mg/m2/day for the first cycle and 200 mg/m2/day for subsequent cycles (q28).

Timeline

• Start date: 2021-03-25
• Primary completion: 2025-07-01
• Completion: 2025-12-01
• First posted: 2020-08-24
• Last updated: 2025-07-22

Locations

1 site across 1 country: Italy