Sleep/wake behavior and eeg signatures of the tgf344-ad rat model at the prodromal stage

Matthias Kreuzer, Glenda L. Keating, Thomas Fenzl, Lorenz Härtner, Christopher G. Sinon, Ihab Hajjar, Vincent Ciavatta, David B. Rye, Paul S. García

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Transgenic modification of the two most common genes (APPsw, PS1∆E9) related to familial Alzheimer’s disease (AD) in rats has produced a rodent model that develops pathognomonic signs of AD without genetic tau-protein modification. We used 17-month-old AD rats (n = 8) and age-matched controls (AC, n = 7) to evaluate differences in sleep behavior and EEG features during wakefulness (WAKE), non-rapid eye movement sleep (NREM), and rapid eye movement sleep (REM) over 24-h EEG recording (12:12h dark–light cycle). We discovered that AD rats had more sleep–wake transitions and an increased probability of shorter REM and NREM bouts. AD rats also expressed a more uniform distribution of the relative spectral power. Through analysis of information content in the EEG using entropy of difference, AD animals demonstrated less EEG information during WAKE, but more information during NREM. This seems to indicate a limited range of changes in EEG activity that could be caused by an AD-induced change in inhibitory network function as reflected by increased GABAAR-β2 expression but no increase in GAD-67 in AD animals. In conclusion, this transgenic rat model of Alzheimer’s disease demonstrates less obvious EEG features of WAKE during wakefulness and less canonical features of sleep during sleep.

Original languageEnglish (US)
Article number9290
Pages (from-to)1-19
Number of pages19
JournalInternational journal of molecular sciences
Volume21
Issue number23
DOIs
StatePublished - Dec 1 2020
Externally publishedYes

Keywords

  • Alzheimer’s
  • Electroencephalography
  • Sleep architecture

ASJC Scopus subject areas

  • Catalysis
  • Molecular Biology
  • Spectroscopy
  • Computer Science Applications
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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