This phase Ib trial tests the safety, side effects and best dose of P30-linked EphA2, cytomegalovirus (CMV) pp65, and survivin (P30-EPS) vaccine given with carboxymethlcellulose, polyinosinic-polycytidylic acid, and poly-L-lysine double stranded ribonucleic acid (RNA) (Hiltonol®) in treating patients with malignant gliomas. P30-EPS contains three different small proteins (peptides), pp65, EphA2 and survivin. The peptides in P30-EPS are designed to be tumor-specific antigens, which means the antigens are present only on tumor cells and not on other cells in the body. The immune system can recognize peptides on the surface of tumors as a signal to attack and fight the cancer. Hiltonol may further stimulate or enhance the activation of the immune system against the tumor. P30-EPS with Hiltonol may be a safe and effective treatment for patients with malignant gliomas.
Study sponsor and potential other locations can be found on ClinicalTrials.gov for NCT05283109.
PRIMARY OBJECTIVE:
I. Evaluate the safety profile of a cancer vaccine comprised of P30-linked CMV pp65, EphA2 and survivin peptides.
SECONDARY OBJECTIVES:
I. Assess whether pp65-specific polyfunctional T cells increase after priming vaccination with the P30-linked pp65 peptide.
II. Assess whether EphA2- or survivin-specific polyfunctional T cells increase after priming vaccination with P30-linked EphA2 or survivin peptides.
III. Assess whether pp65-specific polyfunctional T cells increase after booster vaccination with the P30-linked pp65 peptide.
IV. Assess whether EphA2- or survivin-specific polyfunctional T cells increase after booster vaccination with P30-linked EphA2 or survivin peptides.
V. Describe the survival and progress-free survival of patients who received a vaccine comprised of P30-linked pp65, EphA2 and survivin peptides.
EXPLORATORY OBJECTIVE:
I. Assess the diversity of the P30-EPS-specific memory T cell repertoire via T cell receptor (TCR) sequencing.
OUTLINE: This is a dose escalation study of P30-EPS in combination with Hiltonol.
PRIMING PHASE: Patients receive P30-EPS with Hiltonol intramuscularly (IM) on days 1, 4, 8, 15 and 22 on study.
BOOSTER PHASE: Patients receive P30-EPS with Hiltonol IM on days 84 and 140 and Hiltonol IM at home every 2 weeks on days 98, 112 and 126 on study.
Patients also undergo magnetic resonance imaging (MRI) at screening and at days 84 and 140 and blood sample collection throughout study.
After completion of study treatment, patients are followed up for 30 days.
Lead OrganizationDuke University Medical Center
Principal InvestigatorMustafa Khasraw