Two Hours of Sleep Restored in Alzheimer’s Brains in Research Breakthrough
Good News Network · 2026-08-16
Researchers at the University of Kentucky have made a breakthrough regarding sleep loss in Alzheimer's disease, identifying hyperactive microglia – the brain’s immune cells – as a key culprit. This finding challenges the previous belief that sleep disruption was primarily due to neuronal death or amyloid plaque accumulation. Comparing it to an uncontrolled sprinkler system damaging an entire house, the team found that microglia, rather than the plaques themselves, cause a "whole house response" leading to sleep deprivation.
By temporarily removing 87% of microglia using the drug Pexidartinib (PLX3397) in mouse models, researchers successfully restored over two hours of sleep per day, specifically non-rapid eye movement (NREM) or restorative sleep, without altering the amount of amyloid plaques. This "mind-blowing" discovery indicates that the inflammatory response triggered by early plaques causes sleep damage, which then stabilizes even as plaque burden more than doubles. The study also highlighted that Alzheimer's uniquely impairs NREM sleep, unlike normal aging which reduces REM sleep. The ultimate goal is to develop affordable, noninvasive tools, possibly utilizing portable EEG for early detection, and investigate existing drugs like Metformin or Stiripentol to calm microglia, aiming to restore sleep and cognitive function before significant memory loss.
*The full article also explores the use of mathematical algorithms to track brain changes and the potential for EEG as a biomarker for Alzheimer's disease.*