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Low dose of targeted drug might improve cancer-killing virus therapy
Date:6/16/2014

COLUMBUS, Ohio Giving low doses of a particular targeted agent with a cancer-killing virus might improve the effectiveness of the virus as a treatment for cancer, according to a study led by researchers at The Ohio State University Comprehensive Cancer Center Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (OSUCCC James).

Viruses that are designed to kill cancer cells oncolytic viruses have shown promise in clinical trials for the treatment of brain cancer and other solid tumors. This cell and animal study suggests that combining low doses of the drug bortezomib with a particular oncolytic virus might significantly improve the ability of the virus to kill cancer cells during oncolytic virus therapy.

The research is published in the journal Clinical Cancer Research.

"These findings pave the way for a treatment strategy for cancer that combines low doses of bortezomib with an oncolytic virus to maximize the efficacy of the virus with little added toxicity," says principal investigator Balveen Kaur, PhD, professor and vice chair of research, Department of Neurological Surgery and Radiation Oncology, and a member of the OSUCCC James Translational Therapeutics Program.

"Because bortezomib is already approved by the Food and Drug Administration, a clinical trial could be done relatively quickly to test the effectiveness of the drug-virus combination," Kaur says.

Bortezomib inhibits the activity of proteasomes, structures in cells that break down and recycle proteins. Kaur notes that blocking these "cellular recycling plants" activates a cellular stress response and increases the expression of heat shock proteins. This reaction, which can lead to bortezomib resistance, makes the cells more sensitive to oncolytic virus therapy with little additional toxicity.

For this study, Kaur and her colleagues used a herpes simplex virus-type 1 oncolytic virus. Key technical findings include:
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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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