Neural stem cell injections reverse stroke damage in mice, restoring movement

Scientists have achieved a breakthrough in stroke recovery using neural stem cell injections in mice. The initial attempt failed due to severe inflammation at the injury site, but after a few weeks, a second injection successfully rebuilt neurons and synaptic connections around the damaged area. The regenerated tissue allowed treated mice to gradually regain smoother movement and perform significantly better on balance and fine-motor coordination tasks compared to untreated controls. Researchers used AI to track and quantify motor improvements, providing objective, detailed metrics of recovery.

This proof-of-concept study highlights the potential of stem cell therapies for stroke, which affects one in four adults over 25. While still in animal models, the approach of timing injections to avoid inflammation and promote repair could translate into new treatments for human stroke survivors, offering hope for reversing paralysis and motor deficits. The next steps involve testing in larger animals and refining delivery methods before human trials.