It’s a biological inevitability: just as our skin wrinkles and our muscles weaken, our brain ages. Over time, our mental machinery loses its luster, memory falters and learning becomes more laborious. The main cause? Our neuron factories gradually stop working. But researchers at the National University of Singapore (NUS) may have just discovered a way to restart production. They identified a protein capable of bringing brain stem cells out of their forced “retirement”.
Stem cell failure
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In a young, healthy brain, very special cells, neural stem cells (NSCs), work tirelessly. They divide to create new neurons, essential for learning and memory. But with age, these cells “retire”. They become inactive.
Why this forced rest? The fault lies mainly with telomeres. Think of them like the plastic tips at the end of your shoelaces: they protect the end of our DNA. With each cell division, these tips wear out and shorten. When they are too short, the cell can no longer divide properly and eventually dies or becomes senescent (inactive). Result: the stock of new neurons collapses, and our cognitive abilities with it.
The cellular “manager” who gets the factory back up and running
This is where the discovery of the Singaporean team comes into play. By comparing young and old cells, they put their finger on a crucial protein: the transcription factor DMTF1. Think of DMTF1 as a workshop boss or genetic switch. Its role is to activate or deactivate certain genes. Researchers have found that young brains are full of DMTF1, while older brains (with worn telomeres) are sorely lacking.
The breakthrough experiment involved artificially reintroducing DMTF1 into aging cells in the laboratory and in mice. The result was spectacular: the addition of this protein stimulated the growth and division of neural stem cells, restarting the production of neurons as in a young brain.
An ingenious workaround
Most fascinating is the method used by DMTF1. The protein did not repair worn telomeres; she found a “workaround”. It activated other “helper” genes (called Arid2 and Ss18) which made it possible to restart the neuron production cycle despite DNA wear and tear.
This is a major breakthrough. Understanding this fundamental mechanism means we could, theoretically, create treatments to force the aged brain to produce new neurons, potentially slowing or reversing cognitive decline.
Not yet a fountain of youth
However, you have to keep a cool head. Although the discovery is promising, it remains confined for the moment to test tubes and animal models. The road to humane treatment is still long and fraught with pitfalls. The main risk is that of control: excessively stimulating cell growth can lead to the development of cancerous tumors.
Future research will therefore have to find the right balance to “wake up” the brain without causing disaster. But one thing is certain: we now have a serious lead to understand, and perhaps one day combat, the aging of our most precious organ.
The study is published in the journal Science Advances.
date:2026-02-12 15:01:00