Brain recovery after stroke improved by cell reprogramming in mice
Recovery after a stroke is rarely complete. But in mice, researchers managed to substantially improve recovery by partially reprogramming a specific type of brain cell. The technique overlaps with approaches used in ageing research.
A stroke damages neurons and disrupts connections in the brain. Recovery requires neuroplasticity: the formation of new connections and the integration of new cells. With age, neuroplasticity declines, making recovery harder for older patients. The researchers focused on corticospinal neurons, the cells connecting the brain cortex to the spinal cord, and partially reprogrammed them toward an earlier developmental state.
This reprogramming, using techniques similar to those explored in cellular rejuvenation research, improved functional recovery in mice after stroke. Treated animals recovered more function than untreated controls.
Reprogramming as a bridge to neural regeneration
Cell reprogramming partially resets the gene expression state of a cell. In ageing research, it is being explored as a way to make cells biologically younger. Here, it was used to help damaged brain cells form new connections. The researchers describe functional improvement in mice but emphasise that translating this to clinical use in humans involves substantial challenges.
Ageing slows recovery, but may be modifiable
The research illustrates a broader pattern: the aged brain environment, characterised by more inflammation and less active stem cells, makes regeneration harder. Interventions that change that environment can improve recovery. Whether cell reprogramming is safe and effective in humans after stroke has not been established. These results are preliminary and based on animal research.
From a longevity perspective, the approach is interesting as a complement to earlier work on rejuvenating the brain environment.
Search terms to explore further: cell reprogramming neuroplasticity recovery, corticospinal neurons stroke regeneration, brain ageing inflammatory environment