Partial cell reprogramming reduced stroke damage in aged mice
An experiment in aged mice found smaller damaged brain areas and better movement-related test results 48 hours after stroke.
Edited by Boris Djordjevic · AgingResearch.News
In an animal experiment in aged mice, researchers tested partial cell reprogramming, which activates proteins used to reset a cell’s identity without completing that reset. Genetically engineered mice allowed the team to activate these proteins in brief, repeated cycles. The researchers permanently blocked a brain artery to produce an ischemic stroke, caused by interrupted blood flow.
At 48 hours, mice with the proteins switched on had smaller damaged brain areas than wild-type controls without the genetic modification. They also had better neurological scores and performed better on a tightrope test, suggesting preserved movement and sensation. Reprogramming also preserved myelin, the insulating covering around nerve fibers, and the density of nerve cells in the affected outer region of the brain.
Why it matters
Aging reduces the brain’s regenerative capacity and is the strongest risk factor for ischemic stroke. The findings suggest partial reprogramming merits investigation as a possible way to strengthen the aging brain’s resilience to interrupted blood flow.
Caveats
The reported outcomes were measured 48 hours after stroke and do not establish lasting recovery. The experiment used genetically engineered mice, not people.
From the paper
- Limitation
First, although both male and female mice were included, the sample size was not designed to allow a statistically powered sex-specific analysis, and therefore, potential sex-dependent effects of YF overexpression cannot be excluded.
Quoted word for word from the full text on onlinelibrary.wiley.com.
The paper
In Vivo Partial Cell Reprogramming With Yamanaka Factors Reduced Ischemic Brain Damage in Aging Mice
Universidad Autónoma de Madrid; Centro de Biología Molecular Severo Ochoa
Aging Cell, Oct 25, 2026, Open access
