Mice testicles yield 'ethical' stem cells * 16:22 24 March 2006 * NewScientist.com news service * Andy Coghlan Men’s testicles may provide an “ethical” source of embryonic stem cells (ESCs), suggest new experiments in mice. A team in Germany has successfully grown mouse ESC-like cells from spermatagonial stem cells which normally turn into sperm. The ESC-like cells can be grown into all tissues of the mouse body, suggesting that if the same could be done in men, it would provide patients with a source of tissue-matched cells for repairing any damaged organs or tissue. So far, all existing colonies of...