Japan treats Parkinson’s

Sumitomo Pharma announced that Japan’s first transplant of induced pluripotent stem cells to treat Parkinson’s disease was performed at Kyoto University Hospital in October, after the treatment received conditional approval in March 2026. The trial involved seven patients. A two-year follow-up found that symptoms had improved in four of them, with no major side effects observed. The transplanted cells are intended to replace dopamine-producing nerve cells. The company plans to treat 20 to 30 patients by March 2029. However, the results do not prove a definitive cure, and further data are needed to confirm the treatment’s long-term safety and effectiveness.

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