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Personlized dendritic cell vaccine increases survival in patients with deadly brain cancer
Date:3/17/2011

A dendritic cell vaccine personalized for each individual based on the patient's own tumor may increase median survival time in those with a deadly form of brain cancer called glioblastoma, an early phase study at UCLA's Jonsson Comprehensive Cancer Center has found.

Published this week in the peer-reviewed journal Clinical Cancer Research, the study also identified a subset of patients more likely to respond to the vaccine, those with a subtype of glioblastoma known as mesenchymal, which accounts for about one-third of all cases. This is the first time in brain cancer that a subset of patients more likely to respond to an immunotherapy has been identified, said Dr. Linda Liau, a Jonsson Cancer Center researcher, professor of neurosurgery and senior author of the study.

The study found that the vaccine, administered after the conventional treatments of surgery and radio-chemotherapy, was associated with a median survival of 31.4 months, double the 15 months of historical controls in the published literature. In all, 23 patients were enrolled in the Phase I study that was launched in 2003. Of those, about one third of participants are still alive, some more than eight years after their diagnosis.

The study also found that the vaccine was safe and that side effects were minimal, limited mostly to flu-like symptoms and rashes near the vaccine injection site.

"This is quite an encouraging result, especially in an early phase study like this," Liau said. "It's promising to see patients with this type of brain cancer experience such long survivals."

However, Liau cautioned that the findings need to be confirmed in larger, randomized studies. She currently is leading a Phase II, randomized study at UCLA testing the vaccine in newly diagnosed glioblastoma patients. The patients will receive either the standard of care (surgery, radiation and chemotherapy) or the standard of care plus the vaccine. The study is
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Contact: Kim Irwin
kirwin@mednet.ucla.edu
310-206-2805
University of California - Los Angeles
Source:Eurekalert

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