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Researchers discover hidden genetic influence on cancer
Date:10/13/2011

ouse model of melanoma. With the help of a bioinformatics team from the University of Turin, they did an in-depth analysis of one ceRNA (ZEB2) that is reduced in human cancer and verified that its reduction accelerated cancer progression in the mice. Interestingly, while the ZEB2 ceRNA opposes melanoma by sponging the microRNAs that would otherwise repress PTEN's tumor suppression activity, the ZEB2 protein is known to promote other cancers. "It is astonishing that RNA and protein molecules encoded by the same gene can take part in opposing biological processes," Karreth said.

The final study extends functional evidence of the new RNA network phenomenon to the normal differentiation of human muscle cells and to the large realm of human non-coding RNAs. Irene Bozzoni's group at the Sapienza University of Rome found that a long non-protein coding RNA works similarly as a decoy for microRNAs in normal muscle differentiation in mice and humans. In Duchenne muscular dystrophy, the decoy RNA is missing at a crucial time, preventing muscle cells from maturing.

"This explains in part why Duchenne cells have trouble, and it gives us another circuitry to attack in order to cure the disease," said Bozzoni, who heard about Pandolfi's ceRNA hypothesis at a meeting last year. "We have been working on noncoding RNA and microRNA for quite a long time. This cross-talk of RNAs through microRNAs is a revolutionary idea."


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Contact: Bonnie Prescott
bprescot@bidmc.harvard.edu
617-667-7306
Beth Israel Deaconess Medical Center
Source:Eurekalert

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