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BUSM researchers identify key regulator of inflammatory response
Date:4/12/2012

(Boston) Researchers at Boston University School of Medicine (BUSM) have identified a gene that plays a key role in regulating inflammatory response and homeostasis. These findings could help lead to the development of innovative methods to reduce the inflammation associated with cancer, type 2 diabetes and other diseases.

The study, which was led by Valentina Perissi, PhD, assistant professor of biochemistry at BUSM, was done in collaboration with the Howard Hughes Medical Institute (HHMI) at the University of California, San Diego. The results are published online and will be in the April 13 print issue of Molecular Cell.

Cells respond to inflammation by producing cytokines, which are cellular signaling protein molecules that allow for intercellular communication. Cytokines, such as TNF-alpha for example, bind to specific receptors on cellular membranes, activating an intracellular signaling process.

In this study, researchers looked at a gene called GPS2, which was previously known to regulate gene expression in the nucleus. This study found that GPS2 plays a critical role at the cellular membrane level to negatively regulate the signaling cascade activated by TNF-alpha. As a result, they observed that increasing GPS2 levels was sufficient to impair the response to TNF-alpha, resulting in a decreased inflammatory response.

Given this information, the researchers then examined whether having more GPS2 in fat tissue would help reduce the development of insulin resistance in conjunction with obesity. The results were promising as insulin signaling in the fat tissue was greatly improved. However, overexpression of GPS2 in the nucleus also had a negative effect on liver function.

"Our study demonstrates that GPS2 plays an important regulatory function in mitigating inflammation," said Perissi, who served as the study's senior author. "These findings have uncovered a potential new target for therapeutic trea
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Contact: Jenny Eriksen
jenny.eriksen@bmc.org
617-638-6841
Boston University Medical Center
Source:Eurekalert

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