A possible new way to protect the brain from dementia may come down to something surprisingly small: a missing fat-like molecule in brain cell membranes. Researchers at the University of Vermont found that restoring a phospholipid called PIP2 may help normalize blood flow in the brain — a key issue tied to Alzheimer’s disease and other forms of dementia.
In preclinical experiments, the team focused on a pressure-sensing protein called Piezo1, found in the cells that line brain blood vessels. Piezo1 helps regulate blood flow by responding to the force of blood moving through the vessels. But the researchers found that in dementia-related conditions, Piezo1 becomes overly active. They also found that when PIP2 levels drop, the brain loses a natural “brake” that normally keeps Piezo1 under control. As a result, blood flow regulation worsens.
When researchers added PIP2 back into the system, Piezo1 activity calmed down and brain blood flow returned to a healthier pattern. The findings suggest that boosting PIP2 — or developing therapies that control Piezo1 in the same way — could offer a new strategy to protect the brain as people age.
While this research is still early and not yet ready for human testing, it supports a growing idea that dementia may not only be a brain-cell disease, but also a blood-flow disease — and restoring circulation could become part of future prevention and treatment.
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