Description: U.S. researchers say they've successfully reprogrammed adult stem cells from the testes of male mice into a wide variety of cell types, including functional blood vessels, contractile cardiac tissue, and brain cells. If the same can be done with adult testes stem cells from humans, they may offer a source of new therapies to treat men with health problems such as heart disease, vascular diseases, diabetes, stroke, Parkinson's, Alzheimer's, and even cancer, the researchers said.