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Same cell death pathway involved in three forms of blindness, Penn team finds
Date:1/16/2014

Gene therapies developed by University of Pennsylvania School of Veterinary Medicine researchers have worked to correct different forms of blindness. While effective, the downside to these approaches to vision rescue is that each disease requires its own form of gene therapy to correct the particular genetic mutation involved, a time consuming and complex process.

Hoping to develop a treatment that works more broadly across diseases, a Penn Vet team used canine disease models to closely examine how retinal gene activity varied during the progression of three different forms of inherited vision disease. Their results turned up an unexpected commonality: Early on in each of the diseases, genes involved in the same specific pathway of cell death appeared to be activated. These findings point to possible interventions that could curb vision loss across a variety of inherited retinal diseases.

The work, published in PLOS ONE, was conducted by Sem Genini, a senior research investigator; William A. Beltran, assistant professor of ophthalmology; and Gustavo D. Aguirre, professor of medical genetics and ophthalmology, all of Penn Vet's Department of Clinical Studies, Philadelphia.

The team examined three forms of retinal degenerative diseases, rod cone dysplasia 1 being the most severe, or earliest onset, followed by X-linked progressive retinal atrophy 2 and then early retinal degeneration. All of these diseases involve the death of photoreceptor cells and each is caused by a distinct genetic mutation. But what scientists did not know is how the mutations trigger a molecular signaling pathway that leads to the death of photoreceptor cells.

"What we have in mind is to be able to address multiple forms of disease with one treatment," Beltran said. "We wanted to get a better understanding of whether there are any common cell death or cell survival pathways that could be targeted in some of these diseases."

The resear
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Contact: Katherine Unger Baillie
kbaillie@upenn.edu
215-898-9194
University of Pennsylvania
Source:Eurekalert  

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