Circadian and sleep phenotypes in a mouse model of Alzheimer’s disease characterized by intracellular accumulation of amyloid β oligomers

Dec 13, 2023Experimental animals

Daily rhythm and sleep patterns in mice with Alzheimer’s-related buildup of harmful protein clusters

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Abstract

Aβ-GFP transgenic mice showed elongated rapid eye movement (REM) sleep durations compared to wild-type mice.

  • Circadian rhythm and free-running activity were similar in Aβ-GFP transgenic and wild-type mice.
  • Non-REM sleep and wakefulness durations were not affected in Aβ-GFP transgenic mice.
  • Aβ-GFP transgenic mice demonstrated shifts in EEG power spectra towards higher frequencies during the inactive light phase.
  • The intracellular accumulation of amyloid beta oligomers may be linked to changes in sleep quality.
  • The impact of Aβ oligomers on circadian systems appears to be limited.

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