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Scientists identify molecule that can increase blood flow in vascular disease
Date:3/10/2011

CHAPEL HILL, N.C. Circulating through the bloodstream of every human being is a rare and powerful type of cell, one that can actually create new blood vessels to bypass blockages that cause heart attacks and peripheral artery disease. Though everyone has these cells called endothelial progenitor cells they are often dysfunctional in people prone to vascular disease.

Now researchers at the University of North Carolina at Chapel Hill have discovered that a molecule called Wnt1 can improve the function of endothelial progenitor cells, increasing the blood flow to organs that previously had been cut off from the circulation. The finding could enhance clinical trials already testing these powerful cells in patients hospitalized with cardiac arrest.

"The premise of these trials is that these cells will supply the ischemic organ with new blood vessels and allow the damaged organ to function better," said senior study author Arjun Deb, MD, assistant professor of medicine in the UNC School of Medicine. "But because you are isolating these cells from the patients themselves, you know that the cells are dysfunctional -- so the approach is almost flawed from the very beginning. We want to see how we can improve the function of these cells so they can do their job better."

The study, published online Feb. 14, 2011, in the FASEB (Federation of American Societies for Experimental Biology) Journal, is the first to show that the Wnt1 protein, one of a family of 19 such molecules, can stimulate blood vessel formation.

A number of studies in the past few years have suggested that genes that play an important role during early development and get "turned off" during adulthood may also get "turned on" or expressed again in response to injury, such as heart attack.

Deb, who studies the Wnt family of developmental genes, looked to see if any of its members follow this same pattern. He found that one gene in particular, Wnt1,
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Contact: Les Lang
llang@med.unc.edu
919-966-9366
University of North Carolina School of Medicine
Source:Eurekalert  

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