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Study identifies possible new target for future brain cancer drugs
Date:2/27/2014

COLUMBUS, Ohio A molecule in cells that shuts down the expression of genes might be a promising target for new drugs designed to treat the most frequent and lethal form of brain cancer, according to a new study by researchers at The Ohio State University Comprehensive Cancer Center Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (OSUCCC James).

The findings, published in the journal Cancer Research, show that high levels of the enzyme PRMT5 are associated with aggressive growth of the brain cancer glioblastoma multiforme (GBM). The malignancy strikes nearly 14,000 Americans annually. It is a highly invasive form of cancer that is difficult to remove entirely by surgery. Following surgery, chemotherapy and radiation, average survival is still only 15 months, pointing to a critical need for new treatments.

This study shows that inhibiting PRMT5 can significantly improve survival in an animal model of GBM. Blocking the enzyme inhibited the growth, proliferation and migration of GBM cells in laboratory studies, and it increased the number of GBM cells that died by apoptosis.

"Our findings suggest that PRMT5 is a possible prognostic factor and therapeutic target for glioblastoma, and they provide a rationale for developing agents that target PRMT5 in this deadly disease," says co-corresponding author Robert A. Baiocchi, MD, PhD, associate professor of medicine and a hematologist at the OSUCCC James who is also collaborating on an Ohio State effort to develop a PMRT5 inhibitor.

"Our analyses also helped us identify PRMT5 as a master transcriptional repressor (gene silencer) in this disease, says co-corresponding author Balveen Kaur, PhD, professor of Neurological Surgery at the OSUCCC James.

"We also learned that PRMT5 inhibition induced the death of glioblastoma cells whether the P53 gene was mutated or not. This has important treatment implications because loss of P53 is associated with a poor prognosis in t
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Contact: Darrell E. Ward
Darrell.Ward@osumc.edu
614-293-3737
Ohio State University Wexner Medical Center
Source:Eurekalert

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