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A map for eye disease
Date:8/1/2014

Understanding eye diseases is tricky enough. Knowing what causes them at the molecular level is even more confounding.

Now, University of Iowa researchers have created the most detailed map to date of a region of the human eye long associated with blinding diseases, such as age-related macular degeneration. The high-resolution molecular map catalogs thousands of proteins in the choroid, which supplies blood and oxygen to the outer retina, itself critical in vision. By seeing differences in the abundance of proteins in different areas of the choroid, the researchers can begin to figure out which proteins may be the critical actors in vision loss and eye disease.

"This molecular map now gives us clues why certain areas of the choroid are more sensitive to certain diseases, as well as where to target therapies and why," says Vinit Mahajan, assistant professor in ophthalmology at the UI and corresponding author on the paper, published in the journal JAMA Ophthalmology. "Before this, we just didn't know what was where."

What vision specialists know is many eye diseases, including age-related macular degeneration (AMD), are caused by inflammation that damages the choroid and the accompanying cellular network known as the retinal pigment epithelium (RPE). Yet they've been vexed by the anatomy: Why does it seem that some areas of the choroid-RPE are more susceptible to disease than others, and what is happening at the molecular level? The researchers set about to answer that question with non-diseased eye tissue donated by three deceased older individuals through the Iowa Lions Eye Bank. From there, Mahajan and Jessica Skeie, a post-doctoral researcher in ophthalmology at the UI, created a map that catalogs more than 4,000 unique proteins in each of the three areas of the choroid-RPE: the fovea, macula, and the periphery.

Why that's important is now the researchers can see which proteins are more abundant in certain areas, and
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Contact: Richard Lewis
richard-c-lewis@uiowa.edu
319-384-0012
University of Iowa
Source:Eurekalert  

Page: 1 2

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