ScienceDaily (Oct. 11, 2012) In recent years investigators have discovered that breast tumors are influenced by more than just the cancer cells within them. A variety of noncancerous cells, which in many cases constitute the majority of the tumor mass, form what is known as the "tumor microenvironment." This sea of noncancerous cells and the products they deposit appear to play key roles in tumor pathogenesis. Among the key accomplices in the tumor microenvironment are mesenchymal stem cells (MSCs), a group of adult progenitor cells which have been shown to help breast cancers maneuver and spread to other parts of the body. Now, new research sheds further light on how this is happening. Led by investigators at Beth Israel Deaconess Medical Center (BIDMC), the findings demonstrate that the lysyl oxidase (LOX) gene is spurred to production in cancer cells as a result of their contact with MSCs, and once produced, can help ensure the spread of otherwise weakly metastatic cancer cells from primary tumors to the lung and bones. Described on-line in the Proceedings of the National Academy of Sciences (PNAS), this discovery not only provides key insights into the basic biology of tumor formation, but also offers a potential … Continue reading
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