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Tissue around tumor holds key to fighting triple negative breast cancer
Date:9/19/2012

PHILADELPHIA A natural substance found in the surrounding tissue of a tumor may be a promising weapon to stop triple negative breast cancer from metastasizing.

A preclinical study published in PLOS ONE September 19 by Thomas Jefferson University researchers found that decorin, a well-studied protein known to help halt tumor growth, induces a series of tumor suppressor genes in the surrounding tissue of triple negative breast cancer tumors that help stop metastasis.

"These findings provide a new paradigm for decorin, with great implications for curbing tumor growth by inducing new tumor suppressor genes within the tumor microenvironment, and for the discovery of novel gene signatures that could eventually help clinical assessment and prognosis," said senior author Renato V. Iozzo, M.D., Professor of Pathology, Anatomy and Cell Biology, at Thomas Jefferson University.

Triple negative breast cancer is the most deadly of breast cancers, with fast-growing tumors, that disproportionately affect younger and African-American women. Today, no such marker is applied in care of triple negative breast cancer, and as a result, patients are all treated the same.

"Originally, we thought that decorin was affecting the tumor, but, surprisingly, decorin affects the so-called tumor microenvironment, where malignant cells grow and invade, igniting genes to stop such growth," said Dr. Iozzo, who is also a member of Jefferson's Kimmel Cancer Center. "Absence of decorin in the microenvironment could explain metastasis in some patients, where higher levels of the protein may kee
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Contact: Steve Graff
stephen.graff@jefferson.edu
215-955-5291
Thomas Jefferson University
Source:Eurekalert

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