Immune cells linked to sleep disruption
Scientists have uncovered a surprising mechanism behind sleep loss in Alzheimer's disease: the brain's own immune cells, called microglia. In a study published July 20, researchers found that microglia become overactive in Alzheimer's and disrupt the brain's sleep-wake cycles. By targeting these immune cells, the team was able to restore up to two hours of sleep in animal models without clearing the amyloid plaques typically associated with the disease.
The discovery suggests that sleep problems in Alzheimer's may not be a direct result of plaque buildup but rather a consequence of neuroinflammation driven by the immune system. This opens a potential treatment pathway separate from the amyloid-targeting approaches that have dominated Alzheimer's research.
Protein SORLA defends against tau damage
In a separate breakthrough also published this week, researchers identified a protein called SORLA that acts as a natural defense against the toxic tau tangles involved in Alzheimer's disease. Tau tangles are one of the two hallmark pathologies of Alzheimer's, and SORLA appears to help protect neurons from their damaging effects. The finding could lead to new therapies that boost the body's natural defenses against the disease.
AI-powered blood test for early heart risk
In related health science news, researchers announced a new AI-powered blood test that can provide early warning of heart and circulation problems. The test analyzes patterns in blood biomarkers that are not detectable through conventional testing, potentially allowing for intervention years before symptoms appear.