Activating the brain's own support cells may be a new way to fight Alzheimer's disease. Researchers at Baylor College of Medicine found that boosting a protein called Sox9 helps star-shaped astrocytes remove harmful amyloid plaques and preserve memory in mice.
The Research
Dr. Dong-Joo Choi and Dr. Benjamin Deneen led a study published in Nature Neuroscience on May 2, 2026. They focused on Sox9, a protein that regulates gene activity in aging astrocytes. In mouse models of Alzheimer's that already had memory problems and amyloid plaques, the team either increased or eliminated Sox9 and tracked cognitive performance over six months.
Mice with higher Sox9 levels showed enhanced astrocyte activity, more complex cell structures, and significantly reduced plaque buildup. They also maintained better memory on object-recognition tests. Conversely, lowering Sox9 led to faster plaque accumulation and simpler astrocytes.
“We found that increasing Sox9 expression triggered astrocytes to ingest more amyloid plaques, clearing them from the brain like a vacuum cleaner,” said Deneen.
Why It Matters
Most Alzheimer's treatments focus on preventing plaque formation or targeting neurons. This study shows that enhancing the brain's natural cleanup crew—astrocytes—could be equally important. Because the experiments used mice with established symptoms, the findings may better reflect what happens in human patients.
If future research confirms similar mechanisms in humans, boosting Sox9 could become a strategy to slow cognitive decline. For now, it highlights the brain's remarkable ability to repair itself when given the right signals.
What You Can Do
While this is early-stage research, you can support your brain's health with lifestyle habits. Regular exercise, a Mediterranean diet, and quality sleep are known to promote astrocyte function and reduce inflammation. Keep your mind active with puzzles and learning—your brain's support cells thrive on stimulation.
Source: ScienceDaily Mind & Brain
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