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Scientists Discover a Role for the Growth Factor TGF-beta in Maintaining Health of Retinal Blood Vessels
Date:4/7/2009

BOSTON, April 7 /PRNewswire-USNewswire/ -- Scientists at Schepens Eye Research Institute have found that the growth factor known as TGF-beta is essential to the health of blood vessels in the retina and that blocking it can cause retinal dysfunction. These findings, published in the April 2 issue of PLoS ONE, may have an important impact on the prevention and treatment of diseases such as diabetic retinopathy and macular degeneration.

"These results are significant because they add to our understanding of the molecules that help to maintain blood vessels in a healthy state," says Patricia D'Amore, PhD, senior scientist at Schepens and principal investigator of the study, who adds that this information may be useful in understanding the changes that occur in the retinal microvasculature prior to the development of proliferative diabetic retinopathy.

"Insight into the role of this growth factor may also help clinicians monitor the use of systemic drugs targeting TGF-beta, which is elevated in a number of conditions (such as cancer and fibrotic diseases) to limit any vision problems that might occur as a side effects," adds Tony Walshe, PhD, the first author of the study and a Postdoctoral Fellow in the D'Amore's laboratory team.

Capillaries are the smallest blood vessels in the body and the site at which oxygen and nutrients are transferred from the blood to the tissues. A capillary is composed of an endothelial cell, which forms the lining of the small tube, and a pericyte, which wraps around the outside of the tube. Scientists have long believed that communication between these two cell types is necessary to maintain blood vessel structure and function.

According to Walshe, the goal of the PLoS ONE study was to determine if TGF-beta plays a role in keeping blood vessels functioning normally. In previous experiments using tissue cultures, the D'Amore laboratory had identified TG
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SOURCE Schepens Eye Research Institute
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