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Pitt/NIH team find way to protect healthy cells from radiation damage
Date:10/21/2009

obustly delayed the regrowth of tumors in radiation-treated mice."

It's not yet clear why disrupting the CD47 signaling pathway leads to these effects, the researchers said. It's possible that radiation impairs the immune response to tumors even while killing tumor cells, but suppression of CD47 keeps the immune cells safe. Decreasing CD47 levels on tumor cells also could make them more sensitive to attack by the patient's immune system after treatment. Or, suppression of injury to vascular cells might improve blood flow to allow naturally occurring anti-tumor immunity to reach cancer cells more easily.

The researchers are already exploring the signaling pathway's role in several other domains, noted Mark Gladwin, M.D., chief of Pitt's Division of Pulmonary, Allergy, and Critical Care Medicine and director of the Vascular Medicine Institute, where Dr. Isenberg is a principal investigator.

"Dr. Isenberg and his team are examining multiple disease treatment strategies for pulmonary hypertension, wound healing, sickle cell disease and heart attacks, based on the blockade of the thrombospondin-1/CD47 pathway," he said.


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Contact: Anita Srikameswaran
SrikamAV@upmc.edu
412-578-9193
University of Pittsburgh Schools of the Health Sciences
Source:Eurekalert

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