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Experimental radioprotective drug safe for lung cancer patients, says Pitt study
Date:3/22/2011

ial indicate that MnSOD plasmid liposome can be safely administered," Dr. Greenberger said. "It did not linger in normal cells after treatment, nor did it protect cancer cells from radiation treatment. The next study, which is underway at UPCI, is to determine whether it protects normal tissue, particularly the esophagus, from radiation exposure."

A common toxicity of lung cancer radiation therapy is esophagitis, or inflammation of the esophagus, he explained. Within a few weeks of treatment, patients typically experience painful swallowing that over time can become so severe that narcotics or a break from radiotherapy may be necessary for patient comfort.

Preclinical testing has shown that generating higher levels of MnSOD in healthy cells can suppress the production of inflammatory molecules and reduce cell death, micro-ulceration and esophagitis. Because the agent is delivered to healthy tissue, it does not protect tumor cells from radiation treatment. In fact, Dr. Greenberger noted, experiments hint that when it is given to cancer cells, it actually encourages cell death because of abnormalities in their cellular metabolism.

He and his team plan to investigate the use of MnSOD plasmid liposome for other cancers, such as protecting the rectum from radiotherapy for prostate cancer and protecting the bladder during ovarian or endometrial cancer treatment.


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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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