1.   And in most cases, giving drugs would not require the surgery that might be needed to implant cells grown from stem cells.

2.   Some reported that many patients were helped and that PET scans showed that dopamine was being made where the cells were implanted.

3.   The cells are implanted near the injury or on the opposite side of the brain, said Dr. Tracy McIntosh, a neuroscientist at the University of Pennsylvania.

4.   Was it an effect of the trauma of implanting the cells, which might have caused already existing nerve cells to sprout?

5.   After it worked in test tubes, she injected human cells with the cancer virus or with SDS-treated virus and then implanted those cells inside mice.

6.   In the study, Forsyth and his colleagues implanted laboratory cells of glioblastoma, a highly aggressive form of brain cancer, into the brains of two dozen mice.

7.   Then they implanted cells derived from the snouts of pigs.