Researchers reported in the journal Nature that they were able to turn human embryonic stem cells into nerve cells that can give off the brain chemical dopamine. Transplantation of the cells into the brains of mice and rats eliminated symptoms like those of Parkinson's disease, the study said. The cells, which were also successfully transplanted into rhesus monkeys, could be ready for human trials in three to four years, said Dr. Lorenz Studer, the study's lead author.
Researchers' growth of nerve cells offers hope for Parkinson's
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