LOS ANGELES, Nov. 21, 2016 /PRNewswire/ -- ImmunoCellular Therapeutics, Ltd. ("ImmunoCellular") (NYSE MKT:IMUC) announced the presentation of updated immune monitoring data from the phase 2 trial of ICT-107 in patients with newly diagnosed glioblastoma. Also presented were updated long-term survival data from the phase 1 trial of ICT-107. ICT-107 is a dendritic cell-based immunotherapy targeting multiple tumor-associated antigens on glioblastoma stem cells. ICT-107 is currently being tested in a phase 3 registration trial in patients with newly diagnosed glioblastoma. The updated phase 1 and phase 2 data were presented in two oral sessions on Friday, November 18th, at the 21st Annual Scientific Meeting and Education Day of the Society for Neuro-Oncology, held in Scottsdale, AZ.
The ICT-107 phase 2 trial was a randomized, double-blind, placebo-controlled phase 2 study of the safety and efficacy of ICT-107 in patients with newly diagnosed glioblastoma following resection and chemoradiation. ICT-107 is an intradermally administered autologous immunotherapy consisting of the patient's own dendritic cells pulsed with six synthetic tumor-associated antigens: AIM-2, MAGE-1, TRP-2, gp100, HER-2, IL-13Ra2. The placebo control consisted of the patient's unpulsed dendritic cells. The data from the phase 2 trial indicated a survival advantage in the ICT-107 treated group compared to the control group. The data also showed an association between immune response and survival, especially in HLA-A2 positive (HLA-A2+) patients, which is the target patient population for the ongoing phase 3 registration trial. The updated immune response data from the phase 2 trial showed that treatment with ICT-107 resulted in the development of a measurable anti-tumor T cell response in some patients, which was associated with survival. Patients that developed the anti-tumor T cell response which was measurable by both ELISpot (to detect viable T cells capable of binding to a target antigen) and multimer testing (to detect T cell binding with higher sensitivity than ELISpot) had improved survival. The data demonstrated that immuno-monitoring can provide an early indication of patients responding to immunotherapy. In the current ongoing phase 3 registration trial of ICT-107, ImmunoCellular plans to perform immuno-monitoring to support the trial.