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Research yields new clues to how brain cancer cells migrate and invade
Date:5/1/2012

Researchers have discovered that a protein that transports sodium, potassium and chloride may hold clues to how glioblastoma, the most common and deadliest type of brain cancer, moves and invades nearby healthy brain tissue. The findings, reported 1 May in the online, open-access journal PLoS Biology, also suggest that a cheap FDA-approved drug already on the market could slow movement of glioblastoma cells.

"The biggest challenge in brain cancer is the migration of cancer cells. We can't control it," says study leader Alfredo Quinones-Hinojosa, M.D., an associate professor of neurosurgery and oncology at the Johns Hopkins University School of Medicine. "If we could catch these cells before they take off into other parts of the brain, we could make malignant tumors more manageable, and improve life expectancy and quality of life. This discovery gives us hope and brings us closer to a cure."

Glioblastoma, which is diagnosed in roughly 10,000 Americans each year, is so aggressive that the average life expectancy after diagnosis is just 15 months, Quinones says. The cancer spreads to healthy brain tissue so quickly and completely that surgical cures are virtually impossible and advances in radiation and chemotherapy have been slow in coming.

In a search for ways to prevent or limit the spread, and stop lethal recurrence of the tumor, the researchers focused on a protein called NKCC1 in human tumor cells in the laboratory and also in tumor cells injected into mice. NKCC1 exchanges sodium, potassium and chloride ions, together with water and regulates cell volume.

Quinones-Hinojosa and his team found that cells with more NKCC1 appear to move farther because the protein made it easier for tumor cells to propel themselves through tissue. The more of this protein in the tumor cell, they discovered, the faster the glioblastoma cells were able to travel. When NKCC1 was absent, they noted that the cells had larger focal adhesions,
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Contact: Rachel Jarmy
rjarmy@plos.org
44-122-344-2837
Public Library of Science
Source:Eurekalert

Page: 1 2

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