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USC researchers develop new drug to target tumor cells and blood vessels
Date:4/20/2009

Researchers at the University of Southern California have identified a new drug compound that appears to target tumor cells and surrounding blood vessels without the negative side effects typically associated with Cox-2 inhibitors.

The compound 2.5-dimethyl-celecoxib (DMC) appears to have a strong anti-tumor effect while also attacking the vasculature that provides the blood supply necessary for tumor growth, according to data presented at the AACR 100th Annual Meeting 2009. The findings were presented at a 1 p.m. news conference on Sunday, April 19.

"If left behind, the blood vessels within the tumor will help the tumor cells to survive and re-grow," says Florence M. Hofman, Ph.D., professor of pathology at the Keck School of Medicine of USC. "We believe that DMC will be particularly useful for treating brain tumors such as gliomas, which are highly vascular. It also appears very promising for long-term treatment because it does not have the negative cardiovascular effects associated with Cox-2 inhibitors."

Cox-2 inhibitors are most commonly used as anti-inflammatory drugs and have been shown to be effective in treating certain kinds of cancer. However, long-term use has also been associated with increased risk of heart attack and stroke, Hofman explains. DMC, however, retains anti-tumor activity without inhibition of Cox-2 and the associated increased risk of cardiovascular complications.

Hofman and colleagues from the Keck School of Medicine tested the effectiveness of the DMC compound by isolating endothelial cellsthe cells that line the interior surface of blood vesselsfrom human nonmalignant brain and glioma tissues and treating them with DMC.

They found that the drug was cytotoxic to tumor-associated endothelial cells and suppressed cell proliferation and migration without apparent toxic effects to normal tissues. Drug therapy in animal studies also showed smaller tumors and fewer blood vessels in the tum
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Contact: Meghan Lewit
lewit@usc.edu
323-442-3941
University of Southern California
Source:Eurekalert

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