Protein Boosts Brain's Ability to Clear Alzheimer's Plaques in Mice

Scientists have identified a method to help the brain remove existing amyloid plaques associated with Alzheimer's disease. This approach also helped preserve memory and cognitive function in mouse models. The discovery focuses on astrocytes, which are star-shaped support cells in the brain.

Researchers at Baylor College of Medicine found that increasing levels of a protein called Sox9 significantly improved the ability of astrocytes to clear amyloid plaques. Sox9 plays a key role in regulating astrocyte activity as the brain ages. The findings were published in *Nature Neuroscience*.

The study used mouse models that had already developed cognitive impairment and amyloid plaques. This design is considered more relevant to human Alzheimer's patients. When Sox9 levels were increased in these mice, astrocytes became more active and complex. This enhanced activity promoted the removal of amyloid plaques.

Conversely, lower Sox9 levels led to faster plaque accumulation and reduced astrocyte function. Mice with higher Sox9 levels maintained better cognitive function. This suggests that activating astrocytes to clear plaques could slow mental decline.

This research indicates a potential treatment strategy. It focuses on enhancing the brain's natural support system. The team emphasized that further research is needed to understand Sox9's function in the human brain. However, these findings open new avenues for therapies that utilize astrocytes to combat neurodegenerative diseases.