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UCLA researchers develop new way to screen for brain cancer stem cell killers
Date:10/11/2011

Researchers with UCLA's Jonsson Comprehensive Cancer Center have developed and used a high-throughput molecular screening approach that identifies and characterizes chemical compounds that can target the stem cells that are responsible for creating deadly brain tumors.

Glioblastoma is one of the deadliest malignancies, typically killing patients within 12 to 18 months. These brain cancers consist of two kinds of cells, a larger, heterogeneous population of tumor cells and a smaller sub-population of stem cells, which are treatment-resistant.

The screening system was specifically designed to find drugs that can target that sub-population and prevent it from re-seeding the brain cancer, said study senior author Dr. Harley Kornblum, a Jonsson Cancer Center scientist and a professor of psychiatry and biobehavioral sciences.

"We're pleased that we can present a different way to approach the discovery of potential new cancer drugs," said Kornblum, who also is a researcher with the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research at UCLA. "And by finding these drugs, we may be able to reveal things about the biology of these cancer stem cells."

The study appears in the Oct. 10 issue of Molecular Cancer Therapeutics, a peer-reviewed journal of the American Association of Cancer Research.

After testing more than 31,000 compounds from seven chemical libraries in an initial screen, the team came up with 694 that showed some activity against the brain cancer stem cells. After further narrowing the field down to 168 compounds, they decided to focus on four in future studies because they most successfully inhibited the brain cancer stem cells, Kornblum said.

What Kornblum and his team did in their approach was sort of a reverse of the usual screening processes. Typically, researchers doing high-throughput screening are seeking a drug to hit a specific target they know is on a cancer cel
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Contact: Kim Irwin
kirwin@mednet.ucla.edu
310-206-2805
University of California - Los Angeles Health Sciences
Source:Eurekalert

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