Science
Mice study links overactive brain immune cells to Alzheimer's sleep loss
ScienceDaily reports that depleting about 87% of brain microglia in mice restored over two hours of daily sleep without reducing plaques.
The short version
- ScienceDaily reports University of Kentucky researchers linked overactive brain immune cells, not plaques alone, to sleep loss in Alzheimer's mouse models.[ScienceDaily]
- In mice, depleting about 87% of microglia over 14 days with Pexidartinib restored over two hours of daily sleep.[ScienceDaily]
- The sleep gains occurred without fewer amyloid plaques, and the same benefits have not been shown in people.[ScienceDaily]
- Removing most immune cells is not an established treatment; the team is now testing whether adjusting microglial activity works instead.[ScienceDaily]
Key facts
- Researchers at the University of Kentucky reported the findings in the journal Alzheimer's & Dementia.[ScienceDaily]
- Pexidartinib depleted approximately 87% of microglia in mice after 14 days of dietary treatment.[ScienceDaily]
- Treated mice gained more than two hours of sleep per day, with longer periods of restorative NREM sleep.[ScienceDaily]
- The sleep improvement occurred without any reduction in amyloid plaque levels.[ScienceDaily]
- Sleep disruption emerged around 6 months and did not worsen by 18 months despite more than double the plaque burden, which the team described as a ceiling effect.[ScienceDaily]
What remains uncertain
- The experiments were conducted only in mice, and the same benefits have not been demonstrated in people.[ScienceDaily]
- It is unknown whether adjusting microglial activity, rather than eliminating the cells, can reproduce the beneficial effects.[ScienceDaily]
Sources
Outlet counts describe coverage, not independent confirmation. Reports may share a wire service or original source.