April 6 (Bloomberg) -- Brain damage linked to Parkinson’s disease may spread into transplanted tissue, diminishing hopes of permanent relief through such treatments, according to studies published today in the journal Nature Medicine. Two groups working independently, one from Wallenberg Neuroscience Center in Lund, Sweden, and one from Rush University Medical Center in Chicago, saw signs of the disease in healthy transplants grafted to damaged tissue. A third study at Harvard Medical School in Boston and Dalhousie University in Halifax, Canada, showed the opposite.
