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Penn study finds that antioxidant found in vegetables has implications for treating cystic fibrosis
Date:11/16/2009

PHILADELPHIA Scientists at the University of Pennsylvania School of Medicine discovered that a dietary antioxidant found in such vegetables as broccoli and cauliflower protects cells from damage caused by chemicals generated during the body's inflammatory response to infection and injury. The finding has implications for such inflammation-based disorders as cystic fibrosis (CF), diabetes, heart disease, and neurodegeneration.

Through cell-culture studies and a synthesis of known antioxidant biochemistry, Zhe Lu, MD, PhD , Professor of Physiology, Yanping Xu , MD, PhD , Senior Research Investigator, and Szilvia Szp , PhD, postdoctoral researcher, showed that the antioxidant thiocyanate normally existing in the body protects lung cells from injuries caused by accumulations of hydrogen peroxide and hypochlorite, the active ingredient in household bleach. These potentially harmful chemicals are made by the body as a reaction to infection and injury. In addition, thiocyanate also protects cells from hypochlorite produced in reactions involving MPO, an enzyme released from germ-fighting white blood cells during inflammation. They published their finding this week in the Proceedings of the National Academy of Sciences. Lu is also an Investigator of the Howard Hughes Medical Institute.

"Dr. Lu's work throws new light on how the genetic defect underlying CF leads to the lung illnesses that are the leading cause of death," said Bert Shapiro, Ph.D., who oversees membrane structure grants at the National Institutes of Health's National Institute of General Medical Sciences (NIGMS). "His team's findings suggest that the lungs of people with the disease are more susceptible to the damaging effects of cellular oxidants. While the idea is tantalizing and creative, further testing is needed to confirm it."

The research team demonstrated that in three additional cell types used to extend their ideas to other inflammation-related conditions cardiovasc
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Contact: Karen Kreeger
karen.kreeger@uphs.upenn.edu
215-349-5658
University of Pennsylvania School of Medicine
Source:Eurekalert

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