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Pivotal discoveries in age-related macular degeneration
Date:2/6/2011

or part of the "dark" genome. The discovery of Alu's toxicity and its control by Dicer should prove of great interest to other researchers in the biological sciences, Ambati says.

Ambati's team developed two potential therapies aimed at preventing geographic atrophy and demonstrated the efficacy of both approaches using laboratory models. The first involves increasing Dicer levels in the retina by "over-expressing" the enzyme. The second involves blocking Alu RNA using an "anti-sense" drug that binds and degrades this toxic substance. UK has filed patent applications for both technologies, and Ambati's group is preparing to start clinical trials by the end of this year.

Response from the scientific community has been enthusiastic.

"These findings provide important new clues on the biological basis of geographic atrophy and may provide avenues for intervention through preventing toxic accumulation of abnormal RNA products," said Dr. Paul Sieving, director of the National Eye Institute.

"Ambati's latest research provides important mechanistic insights in geographic atrophy, and identification of this novel pathway may result in new therapeutic targets for a major cause of blindness," said Dr. Napoleone Ferrara, a member of the National Academy of Sciences and Lasker-DeBakey awardee who is a researcher at Genentech.

This work has "widespread implications" for future study, said Dr. Stephen J. Ryan, president of the Doheny Eye Institute and member of the Institute of Medicine.

"The authors have opened an important line of research with real possibilities for future therapeutic intervention for patients with geographic atrophy," Ryan said.


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Contact: Keith L. Hautala
keith.hautala@uky.edu
859-257-1754 x231
University of Kentucky
Source:Eurekalert  

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