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Study: Vaccine targets malignant brain cancer antigens, significantly lengthens survival
Date:8/15/2012

LOS ANGELES (Aug. 14, 2012) An experimental immune-based therapy more than doubled median survival of patients diagnosed with the most aggressive malignant brain tumor, Cedars-Sinai Medical Center researchers reported in Cancer Immunology, Immunotherapy, published online Aug. 3.

Median survival in a Phase I clinical trial at Cedars-Sinai's Johnnie L. Cochran, Jr. Brain Tumor Center was 38.4 months, significantly longer than the typical 14.6-month survival of patients with newly diagnosed glioblastoma receiving standard therapy alone, which includes radiation and chemotherapy.

Median progression-free survival the time from treatment to tumor recurrence was 16.9 months, compared to the typical 6.9 months with standard care.

The study included 16 newly diagnosed patients who could be properly evaluated between May 2007 and January 2010. At later follow-up, six patients (38 percent) ranging from 49 to 66 months post-treatment showed no evidence of tumor recurrence and were free of disease without current active treatment. Eight patients remained alive.

"Brain tumors evade the immune system to survive, and the vaccine is intended to alert the immune system to the existence of cancer cells and activate a tumor-killing response. We also are targeting cells that we believe generate and perpetuate cancers," said Keith L. Black, MD, chair and professor of Cedars-Sinai's Department of Neurosurgery, director of the Cochran Brain Tumor Center and director of the Maxine Dunitz Neurosurgical Institute, where the vaccine was researched and developed. Black is the Ruth and Lawrence Harvey Chair in Neuroscience.

The vaccine's latest version, ICT-107, targets six antigens (HER2/neu, TRP-2, gp100, MAGE-1, IL13R2 and AIM-2) involved in the development of glioblastoma cells. All patient tumors had at least three of the targeted antigens; 74 percent of tumors had all six. Patients with tumors that expressed large am
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Contact: Sandy Van
sandy@prpacific.com
808-526-1708
Cedars-Sinai Medical Center
Source:Eurekalert  

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