No brakes on breast cancer cells

Scientists of the German Cancer Research Center have discovered a tiny RNA molecule, called miR-520, which at once blocks two important pathways in the development of cancer in cells. In estrogen receptor-negative breast cancer, the production of this microRNA is often reduced and this is correlated with malignant behavior of tumor cells. The DKFZ team has found out that tumors with low levels of miR-520 have a particularly strong tendency to metastasize.

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