Expression of a Poly-Glutamine-Ataxin-3 Transgene in Orexin Neurons Induces Narcolepsy-Cataplexy in the Rat

Carsten T. Beuckmann, Christopher M. Sinton, S. Clay Williams, James A Richardson, Robert E Hammer, Takeshi Sakurai, Masashi Yanagisawa

Research output: Contribution to journalArticle

138 Citations (Scopus)

Abstract

The sleep disorder narcolepsy has been linked to loss of hypothalamic neurons producing the orexin (hypocretin) neuropeptides. Here, we report the generation of transgenic rats expressing a human ataxin-3 fragment with an elongated polyglutamyl stretch under control of the human prepro-orexin promoter (orexin/ataxin-3 rats). At 17 weeks of age, the transgenic rats exhibited postnatal loss of orexin-positive neurons in the lateral hypothalamus, and orexin-containing projections were essentially undetectable. The loss of orexin production resulted in the expression of a phenotype with fragmented vigilance states, a decreased latency to rapid eye movement (REM) sleep and increased REM sleep time during the dark active phase. Wakefulness time was also reduced during the dark phase, and this effect was concentrated at the photoperiod boundaries. Direct transitions from wakefulness to REM sleep, a defining characteristic of narcolepsy, occurred frequently. Brief episodes of muscle atonia and postural collapse resembling cataplexy were also noted while rats maintained the electroencephalographic characteristics of wakefulness. These findings indicate that the orexin/ataxin-3 transgenic rat could provide a useful model of human narcolepsy.

Original languageEnglish (US)
Pages (from-to)4469-4477
Number of pages9
JournalJournal of Neuroscience
Volume24
Issue number18
DOIs
StatePublished - May 5 2004

Fingerprint

Cataplexy
Transgenic Rats
Narcolepsy
Wakefulness
REM Sleep
Transgenes
Sleep
Neurons
Lateral Hypothalamic Area
Photoperiod
Neuropeptides
Phenotype
Muscles
Ataxin-3
polyglutamine

Keywords

  • Cataplexy
  • Electroencephalography
  • Electromyography
  • Lateral hypothalamus
  • REM
  • Sleep

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Expression of a Poly-Glutamine-Ataxin-3 Transgene in Orexin Neurons Induces Narcolepsy-Cataplexy in the Rat. / Beuckmann, Carsten T.; Sinton, Christopher M.; Williams, S. Clay; Richardson, James A; Hammer, Robert E; Sakurai, Takeshi; Yanagisawa, Masashi.

In: Journal of Neuroscience, Vol. 24, No. 18, 05.05.2004, p. 4469-4477.

Research output: Contribution to journalArticle

Beuckmann, Carsten T. ; Sinton, Christopher M. ; Williams, S. Clay ; Richardson, James A ; Hammer, Robert E ; Sakurai, Takeshi ; Yanagisawa, Masashi. / Expression of a Poly-Glutamine-Ataxin-3 Transgene in Orexin Neurons Induces Narcolepsy-Cataplexy in the Rat. In: Journal of Neuroscience. 2004 ; Vol. 24, No. 18. pp. 4469-4477.
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