Chronic Sleep Deprivation Exacerbates Learning-Memory Disability and Alzheimer's Disease-Like Pathologies in AβPPswe/PS1Delta;E9 Mice

Hongyan Qiu, Rujia Zhong, Hui Liu, Feng Zhang, Song Li, Weidong Le

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

Recently, there is an increasing concern over the association between sleep disorders and Alzheimer's disease (AD). Clinical observations have reported that chronic sleep deprivation (SD) may serve as a risk factor for AD. However, the pathological evidence for this assumption is still lacking. In the present study, we examined the potential impacts of chronic SD on learning-memory and AD-related pathologies in AβPPswe/PS1Delta;E9 transgenic (TG) mice and their wild-type (WT) littermates. Results indicated that mice (both TG and WT) exposed to 2-month SD showed an altered amyloid-β protein precursor processing, an elevated level of phosphorylated tau protein, and impaired cognitive performance as compared to non-sleep deprivation (NSD) controls. Moreover, the SD-treated TG mice exhibited more amyloid-β1-42 production and developed more senile plaques in the cortex and hippocampus than NSD-treated TG mice. In addition, SD caused a striking neuronal mitochondrial damage, caspase cascade activation, and neuronal apoptosis in the hippocampus of both TG and WT mice. More importantly, all these behavioral, neuropathological, and biochemical changes induced by chronic SD were long lasting and were irreversible during a 3-month normal housing condition. Collectively, these results indicate that chronic SD impairs learning and memory, exacerbates AD pathologies, and aggravates the mitochondria-mediated neuronal apoptosis in a long-lasting manner. Our findings provide important experimental evidence to prove that chronic SD is a risk factor for AD.

Original languageEnglish (US)
Pages (from-to)669-685
Number of pages17
JournalJournal of Alzheimer's Disease
Volume50
Issue number3
DOIs
StatePublished - Feb 2 2016

Keywords

  • Alzheimer's disease
  • amyloid-β
  • apoptosis
  • chronic sleep deprivation
  • mitochondria
  • phosphorylated tau protein
  • senile plaques

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Geriatrics and Gerontology
  • Clinical Psychology

Fingerprint Dive into the research topics of 'Chronic Sleep Deprivation Exacerbates Learning-Memory Disability and Alzheimer's Disease-Like Pathologies in AβPP<sup>swe</sup>/PS1<sup>Delta;E9</sup> Mice'. Together they form a unique fingerprint.

Cite this