Brain Cell Transplants Are Being Tested Once Again For Parkinson's

"Researchers are working to revive a radical treatment for Parkinson's disease."

"The treatment involves transplanting healthy brain cells to replace cells killed off by the disease. It's an approach that was tried decades ago and then set aside after disappointing results."

"Now, groups in Europe, the U.S. and Asia are preparing to try again, using cells they believe are safer and more effective."

"'There have been massive advances,' says Claire Henchcliffe, a neurologist at Weill Cornell Medicine in New York. 'I'm optimistic.'"

"We are very optimistic about ability of [the new] cells to improve patients' symptoms," says Viviane Tabar, a neurosurgeon and stem cell biologist at Memorial Sloan Kettering Cancer Center in New York.