An injection of a type of stem cell into the brains of patients living with progressive multiple sclerosis (MS) is safe, well-tolerated, and has a long-lasting effect that appears to protect the brain from further damage, show initial results of clinical trial.

The study led by an international team is a first-in-human, early-stage clinical trial that involved injecting neural stem cells directly into the brains of 15 patients with secondary MS, and is a step towards developing an advanced cell therapy treatment for progressive MS.