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Loss of gene promotes brain-tumor development, reduces survival, study finds
Date:1/6/2011

COLUMBUS, Ohio New research shows that loss of a gene called NFKBIA promotes the growth of glioblastoma multiforme, the most common and deadly form of brain cancer, and suggests that therapies that stabilize this gene may improve survival for certain glioblastoma patients.

The study was published recently in the New England Journal of Medicine.

"We show that NFKBIA status may be an independent predictor of survival in certain patients with glioblastoma," says senior coauthor Dr. Arnab Chakravarti, chair and professor of Radiation Oncology and co-director of the Brain Tumor Program at the Ohio State University Comprehensive Cancer Center Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (OSUCCC James).

"We also show that this gene plays a key role in glioblastoma behavior, and that it could be useful for predicting treatment outcomes," he says.

An estimated 18, 500 new cases of glioblastoma occur annually among Americans, resulting in 12,760 deaths. Average survival after diagnosis is about 12 to 15 months.

Most cases of the disease are driven by over activity of a gene called EGFR (epidermal growth factor receptor). This study shows that loss of NFKBIA (nuclear factor of kappa-light polypeptide gene enhancer in B-cells inhibitor-alpha) and overexpression EGFR are equally potent at driving glioblastoma development.

It also shows that glioblastoma tumors generally show either abnormally high levels of EGFR or loss of NFKBIA, but not both. Normal levels of both genes also occur.

Chakravarti, along with Markus Bredel, an adjunct associate professor of radiation oncology at Ohio State and their colleagues analyzed data from 790 cases of glioblastoma, which they divided into 10 study sets, for gene deletions, mutations, and expression of NFKBIA and EGFR.

Using glioblastoma cell lines and tumor cells from patients, they examined the influence of the NFKBIA gene o
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Contact: Darrell E. Ward
Darrell.Ward@osumc.edu
614-293-3737
Ohio State University Medical Center
Source:Eurekalert

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