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New study shows promise in using RNA nanotechnology to treat cancers and viral infections
Date:9/4/2012

LEXINGTON, Ky. (Sept. 4, 2012) A new study by University of Kentucky researchers shows promise for developing ultrastable RNA nanoparticles that may help treat cancer and viral infections by regulating cell function and binding to cancers without harming surrounding tissue.

The study, published in Nano Today, was carried out in the laboratory of Peixuan Guo, the William S. Farish Endowed Chair in Nanobiotechnology at the UK Markey Cancer Center, in collaboration with Dr. Mark Evers, director of the UK Markey Cancer Center.

The study uses RNA (ribonucleic acid) as a building block for the bottom-up fabrication of nanostructures. Using the RNA nanotechnology pioneered by Guo, the researchers constructed ultrastable X-shaped RNA nanoparticles using re-engineered RNA fragments to carry up to four therapeutic and diagnostic modules. Their RNA nanoparticles can include small interfering RNA for silencing genes, micro-RNA for regulating gene expression, aptamer for targeting cancer cells, or a ribozyme that can catalyze chemical reactions.

The study demonstrated that regulation of cellular functions progressively increased with the increasing number of functional modules in the nanoparticle.

"RNA nanotechnology is an emerging field, but the instability and degradation of RNA nanoparticles have made many scientists flinch away from the research in RNA nanotechnology," Guo said. "We have addressed these issues, and now it is possible to produce RNA nanoparticles that are highly stable both chemically and thermodynamically in the test tube or in the body with great potential as therapeutic reagents."

The RNA nanoparticles displayed several favorable attributes: polyvalent nature, which allows simultaneous delivery of multiple functional molecules for achieving synergistic effects; modular design, which enables controlled self-assembly with defined structure; thermodynamically stable, which keeps the RNA nanoparticle
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Contact: Allison Perry
allison.perry@uky.edu
859-323-2399
University of Kentucky
Source:Eurekalert  

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