ImmunoCellular Therapeutics, Ltd (IMUC), a biotechnology company, presented promising clinical data from a phase-I trial evaluating ICT-107, the company's dendritic cell-based cancer vaccine product candidate for the treatment of glioblastoma. These data were reported at the American Society of Clinical Oncology Meeting in Orlando, Florida (Abstract #2032), and supplement the preliminary data from the completed clinical trial that the Company reported in December 2008.
The phase I clinical trial of ICT-107 was conducted to evaluate the safety and tolerability of the cancer vaccine in patients with glioblastoma, the most common and malignant type of brain cancer. The trial enrolled 19 patients-16 with newly-diagnosed and three with recurrent disease-and was conducted at Cedars-Sinai Medical Center.
Seven of the 16 newly-diagnosed patients demonstrated stable disease with median progression-free survival of 64 weeks, and three of these seven patients have progression-free survival of over two years. The median progression-free survival time of newly-diagnosed glioblastoma patients is historically 30 weeks. ICT-107 was well tolerated, and no significant adverse events were reported. Nine of the 16 newly-diagnosed patients had progressive disease with a median progression-free survival of 39 weeks and median survival of 56 weeks. The three patients enrolled who had recurrent disease progressed in their disease but still exhibited extended survival times of 34, 47 and 59 weeks.
Fifteen patients in the trial were evaluated for immune responses, and six of them had a significant immune response to at least one tumour-associated antigen. Patients demonstrating an immune response are exhibiting a trend toward longer overall survival. ICT-107 was well tolerated in the study, with no grade 3/4 adverse events and only mild side effects, including grade one fatigue, skin rash and pruritis, which were transient in nature.
"The survival benefit that we are seeing in this trial of ICT-107 is exciting. As a physician who regularly treats glioblastoma patients, having access to an immunotherapy like ICT-107, which may someday have the ability to provide patients with an extended survival and a relatively innocuous side effect profile would be a great improvement over what we currently have to offer," stated Surasak Phuphanich, the principal investigator of the trial and a senior author of the ASCO presentation. "With a historical median progression-free survival time of 6.9 months in glioblastoma, we are encouraged to see a median progression-free survival time of 14.2 months (57.5 weeks) in this newly-diagnosed glioblastoma (16 patients) population, and furthermore, it is exciting to see the correlation between immune response and survival given that the goal of ICT-107 is to elicit a cancer-specific immune response."
"While the data from ICT-107 are encouraging, our top priority is to advance our 'off-the-shelf' cancer stem cell vaccine product candidate, ICT-121, into the clinic. IMUC is expecting to file an Investigational New Drug (IND) application for ICT-121 in the fourth quarter of this year. ICT-121, which may have applicability to multiple types of cancer, will target glioblastoma in the initial phase-I trial," stated Manish Singh, "With the great unmet need represented by glioblastoma across all age groups, we are hopeful that an immunotherapy, such as ICT-121 or ICT-107, may someday offer patients a more effective and safer treatment alternative."
ICT-107 is IMUC's patient-specific therapeutic cancer vaccine product candidate that consists of dendritic cells-immune system cells responsible for presenting antigens (immune system targets) to the immune system-which are obtained from the patient's blood and 'programmed' with tumour antigens which in turn provide a target for the immune system.
The high rate of mortality of patients diagnosed with brain cancers and in particular with glioblastoma multiforme (the most lethal and devastating form) is driving the scientific community to discover and develop improved treatments that could increase the survival time and enhance the quality of life of patients.
IMUC is a Los Angeles-based clinical-stage company that is developing immune based therapies for the treatment of brain and other cancers.