http://medicalxpress.com/ en-us Medical Xpress internet news portal provides the latest news on Health and Medicine. Researchers at Moffitt Cancer Center have determined that the overexpression of microRNA-155 (miR-155), a short, single strand of ribonucleic acid encoded by the miR-155 host gene, promotes the growth of blood vessels in tumors, tumor inflammation, and metastasis. As a therapeutic target, miR-155 could potentially provide a new avenue of treatment when targeted with drugs to suppress its activity. http://medicalxpress.com/news/2013-04-specific-microrna-tumor-growth-cancer.html Cancer Wed, 03 Apr 2013 15:09:37 EST news284220569 (Medical Xpress)—One of the hallmarks of cancer is unchecked cellular growth. Fortunately, our cells contain a number of tumor suppressor proteins, including the cell cycle regulator p21, to keep cell growth in check. The protection conferred by p21, however, can be overridden by an overactive histone-modifying enzyme called PRMT6. This protein represses p21 expression, thereby promoting tumor growth and preventing senescence in breast cancer cells, A*STAR scientists have found. http://medicalxpress.com/news/2013-02-protein-represses-critical-checkpoint-cellular.html Cancer Wed, 13 Feb 2013 09:00:08 EST news279965511 The DNA mutations that accumulate over time as women age are not the sole contributor to the higher frequency of breast cancer in women over 50, Mark LaBarge, PhD, a researcher at Lawrence Berkeley National Laboratory (LBNL) reported on Dec. 17 in a presentation at the American Society for Cell Biology Annual Meeting in San Francisco. http://medicalxpress.com/news/2012-12-progenitor-cell-population-breast-overlooked.html Cancer Mon, 17 Dec 2012 13:00:09 EST news274961056