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Protein balance key in preventing cancer
Date:2/27/2013

PHILADELPHIA, PA (February 27, 2013)Two proteins that scientists once thought carried out the same functions are actually antagonists of each other, and keeping them in balance is key to preventing diseases such as cancer, according to new findings published in the February 25 issue of Developmental Cell by scientists at Fox Chase Cancer Center. The results suggest that new compounds could fight cancer by targeting the pathways responsible for maintaining the proper balance between the proteins.

"It's our job now to understand how we can intervene therapeutically in this system, so we can restore balance when it's thrown off," says study author David L. Wiest, PhD, professor and deputy chief scientific officer at Fox Chase.

The two proteins"Rpl22" and "Rpl22-like1", which contribute to the process by which additional cellular proteins are madeare created from two similar genes, leading researchers to previously believe they were performing identical functions in the body. "What we're finding is that is absolutely not true," says Wiest. "Not only are they performing different functions, they are antagonizing each other."

During the study, Wiest and his team knocked out Rpl22 in zebrafisha common model of human disease. Without Rpl22, the zebrafish don't develop a type of T cells (a blood cell) that helps fight infections. The same developmental defect was observed when they knocked out Rpl22-like1, indicating that both proteins are independently required to enable stem cells to give rise to T cells.

But when the researchers tried to restore T cells in zebrafish that lacked Rpl22 by adding back Rpl22-like1, it didn't work. The reverse was also trueRpl22 was not enough to restore function after the researchers eliminated Rpl22-like1. These results led Wiest and his team to believe that, although the proteins are both involved in producing stem cells, they do not perform the same function.

To learn more about the
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Contact: Diana Quattrone
Diana.Quattrone@fccc.edu
215-728-7784
Fox Chase Cancer Center
Source:Eurekalert

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