Doctors have known for years that when people suffer a stroke, their brains furiously try to repair themselves, but the improvement often plateaus after several weeks or months.
Now, researchers at the University of Pittsburgh Medical Center and Stanford University hope they can enhance recovery by infusing millions of stem cells directly into patients' brains. Using cells developed by a San Francisco-area company called SanBio, the two institutions have carried out the procedure on six patients so far and plan to enroll another 12 in a two-year safety trial.
