Clogged arteries can cause heart attack or stroke. Blockages happen when the smooth single-cell lining, or endothelium, of an artery gets damaged from aging or disorders like high cholesterol, allowing plaque to start growing on the walls. Endothelial cells also produce nitric oxide, essential for dilating blood vessels so blood can flow. Areas without endothelial cells are constricted and have less blood flow, allowing further plaque deposits. Doctors can remove the plaque or open blocked vessels surgically, but even less-invasive procedures like angioplasty scrape off the endothelial cell lining, allowing plaque to form again. To restore the epithelial lining, researchers have tried infusing the damaged site with endothelial cells, cell growth proteins, or genes that code for enzymes that synthesize nitric oxide. But when the cells and molecules are injected, blood flow flushes these agents away. Implanted stents provide another delivery option, but that requires a surgical procedure. Daniela Wenzel , a physiology researcher at the University of Bonn, and her colleagues looked for a new way to direct injected cells to the right place and keep them there. First they packaged genes coding for a green fluorescent protein and a nitric oxide-synthesizing enzyme within a viral vector, commonly used to deliver genetic material into cells.
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military training visits have sometimes run away, a U.S. defense official said that the frequency of Afghan troops going missing was concerning and “out of the ordinary.” Since September alone, eight Afghan troops have left military bases without authorization, Pentagon spokesman Adam Stump said in a statement. He said the total number of Afghan troops who have gone missing since January 2015 is 45. In September of 2014, three Afghan National Army soldiers disappeared during a training exercise in Cape Cod, and were later found trying to cross into Canada near Niagara Falls, officials previously said. Officials said at the time it was believed the trio did not want to return to Afghanistan “The Defense Department is assessing ways to strengthen eligibility criteria for training in ways that will reduce the likelihood of an individual Afghan willingly absconding from training in the U.S. and going AWOL (absent without leave),” Stump said. http://averyleelab.redcarolinaparaguay.org/2016/08/08/simple-tips-on-intelligent-vocation-productsAfghans in the U.S. training program are vetted to ensure they have not participated in human rights abuses and are not affiliated with militant groups before being allowed into the United States, Stump said. The defense official, who spoke on condition of anonymity, added there was no evidence any of those who had absconded had carried out crimes or posed a threat to the U.S. U.S. Soldiers and the Afghan National Army unite during an operational meeting at Forward Operating Base Marjan at the National Training Center in Fort Irwin, California on Aug.
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