Luigi Vescovi (Top L), codirector of the San Raffaele Hospital's Stem Cell Research Institute in...

Luigi Vescovi (Top L), codirector of the San Raffaele Hospital\'s Stem Cell Research Institute in Milan, poses with scientists Giulio Cossu (Top R) and Rossella Galli in a Institute\'s laboratory September 19, 2000. [Scientist in Milan said they had shown that stem cells from the brains of adult rats can be used to generate muscular tissue in a discovery that could eventually have implications for transplant therapy. Vescovi said in a news conference that new research had proven what he called the transdifferentiation capacity of somatic adult stem cells. Its a process by which a cell from a given tissue can give rise to a cell form of a different tissue, possibly even of a different embryonic origin, he told Reuters after presenting a paper to be published in science journal Nature Neuroscience. ]