WLT Report Strokes can be really scary.
The damage it can do to the brain if not treated soon enough can leave a person with serious impairment to their speech and motor skills and memory.
And doctors say it’s permanent.
Or is it?
Studies are coming out that show it doesn’t have to stay that way.
Enter the University of Zurich.
Their research is showing that brain can be healed.
The problem can be reversed.
Stem Cells Repair Brain Damage Caused by Stroke in Micehttps://t.co/i6zTON7J9t
— Stem Cell Tracker (@StemCellTracker) September 22, 2025
University of Zurich study showed:
Stem cell therapy reversed stroke damage in mice, regenerating neurons and restoring movement.
The findings bring scientists closer to human treatments that could one day transform recovery after brain injury.
Breakthrough in Stroke Recovery With Stem Cells
One in four adults suffer a stroke in their lifetime, leaving around half of them with residual damage such as paralysis or speech impairment because internal bleeding or a lack of oxygen supply kill brain cells irreversibly. No therapies currently exist to repair this kind of damage. “That’s why it is essential to pursue new therapeutic approaches to potential brain regeneration after diseases or accidents,” says Christian Tackenberg, the Scientific Head of Division in the Neurodegeneration Group at the University of Zurich (UZH) Institute for Regenerative Medicine.Neural stem cells have the potential to regenerate brain tissue, as a team led by Tackenberg and postdoctoral researcher Rebecca Weber has now compellingly shown in two studies that were conducted in collaboration with a group headed by Ruslan Rust from the University of Southern California. “Our findings show that neural stem cells not only form new neurons, but also induce other regeneration processes,” Tackenberg says.
New Neurons From Human Stem Cells
The studies employed human neural stem cells, from which different cell types of the nervous system can form. The stem cells were derived from induced pluripotent stem cells, which in turn can be manufactured from normal human somatic cells. For their investigation, the researchers induced a permanent stroke in mice, the characteristics of which closely resemble the manifestation of stroke in humans. The animals were genetically modified so that they would not reject the human stem cells.
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