Scientists have converted support cells in the brain into neurons using a gel, a first step that could one day help replace cells lost to Alzheimer's disease.
The research
Published Aug. 26 in the journal Cell Biomaterials, the laboratory study focused on astrocytes — star-shaped cells that are among the most abundant in the brain and normally help support and maintain neurons. The researchers designed a gel material that lowers levels of a key protein inside astrocytes, nudging the cells to change identity and take on neuron-like features.
The work builds on earlier findings that astrocytes retain some flexibility and can be reprogrammed under the right chemical conditions. In this case, the gel served as a scaffold and delivery system, creating a local environment where the conversion could occur. The study is a proof of concept performed in controlled lab conditions, not in human patients. That distinction matters: many promising cell-reprogramming results in petri dishes have struggled to translate into safe, effective treatments in living brains.
Still, the approach targets a real problem. Alzheimer's disease involves the progressive loss of neurons in regions tied to memory and thinking. Because astrocytes are plentiful and naturally live alongside neurons, converting even a fraction of them could, in theory, offer a renewable supply of replacement cells without invasive transplants.
Why it matters for your brain
Your cognition depends on the health of your neurons and the support cells around them. Astrocytes help regulate blood flow, recycle neurotransmitters, and maintain the chemical balance neurons need to fire reliably. When neurons die off in neurodegenerative conditions, astrocytes can become reactive and lose some of that supportive role.
Research like this hints at a future where the brain's own cells could be repurposed to repair damage. It also reinforces a broader theme in cognitive science: brain health is not just about neurons, but about the entire cellular ecosystem. Lifestyle factors that support that ecosystem — sleep, exercise, social engagement, and mental challenge — remain the best-evidenced ways to protect cognition today.
What you can do
- Stay mentally active: Learn new skills, not just repeat familiar ones. Novel challenges stress the brain in productive ways.
- Move regularly: Aerobic exercise is linked to better blood flow and lower dementia risk in observational studies.
- Protect sleep: Deep sleep supports the brain's cleanup systems, which help clear waste that accumulates in neurodegenerative disease.
- Watch your vascular health: Blood pressure, blood sugar, and cholesterol all influence brain aging.
Source
Source: Live Science
Curious about your own brain? Take our free adaptive IQ test or try 306 brain training levels.