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CWRU School of Medicine researchers discover new molecule linked to late-stage breast cancer
Date:12/17/2012

CLEVELAND -- Researchers at Case Western Reserve University School of Medicine have identified a molecule linked to more aggressive forms of breast cancer a discovery that could point the way to potential cures.

Until this study, the ribonucleic acid (RNA) molecule called miR-181a had never before been tied to breast cancer metastasis. But when scientists found elevated levels of the molecule in late-stage breast cancer tissues, they in turn tested an inhibitor in mouse models. The approach not only prevented metastasis, but also extended the animals' lives.

"Overall, these findings reinforce our belief that the discovery of miR-181 will become a strong predictive biomarker for breast cancer metastasis, and that the high expression of miR-181 in tumor tissues will pave the way for the development of targeted therapies, better prognosis and increased patient survival," said lead researcher William Schiemann, PhD, associate professor of General Medical Sciences (oncology) at the medical school and a member of the Case Comprehensive Cancer Center.

The study appears online today in The Journal of Clinical Investigation (JCI) and will be published in the journal's January 2013 edition. Its authors include scientists at Case Western Reserve's School of Medicine, the Cleveland Clinic and University Hospitals.

"This work, published in the most important journal for patient-based discoveries, points us in the direction of a new genetic change in women with high-risk breast cancer," said Stanton Gerson, MD, director of the Case Comprehensive Cancer Center. "This research will impact the field by focusing us on new targets for treating and preventing metastasis in patients with breast cancer."

As breast-cancer tumors spread, they become less responsive to chemotherapy. Generating a cell-based system to replicate such changes enabled the research team to establish the molecule's effect on breast cancer metastasis.
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Contact: Christine A. Somosi
christine.somosi@case.edu
216-368-6287
Case Western Reserve University
Source:Eurekalert

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