Key points from article :
Scientists have helped a man with Parkinson's swim, ski and tie his own shoes again.
Team took the skin cells of a 69-year-old patient and reprogrammed to pluripotent stem cells.
The stem cells were tweaked to become dopaminergic neurons.
First grafted on to lab mice brains and looked for signs of immune system response.
Implanting technique developed involves a syringe to insert the cells into his brain.
The patient struggled with tremors, problems with his posture, and fine motor control.
At 18- and 24-month post-surgeries, no adverse effects or decline in function observed.
He was able to reduce the drugs he was taking to replace dopamine by 6 percent.
Patient just stabilized, Parkinson's still remains an incurable disease.
Team is working with the FDA to move a Phase 1 clinical trial study.
Research by team from McLean Hospital and Massachusetts General Hospital.
Published in New England Journal of Medicine.