Signals from the Brainstem Sleep/Wake Centers Regulate Behavioral Timing via the Circadian Clock

Sabra M. Abbott, Jennifer M. Arnold, Qing Chang, Hai Miao, Nobutoshi Ota, Christine Cecala, Paul E. Gold, Jonathan V. Sweedler, Martha U. Gillette

Research output: Contribution to journalArticle

Abstract

Sleep-wake cycling is controlled by the complex interplay between two brain systems, one which controls vigilance state, regulating the transition between sleep and wake, and the other circadian, which communicates time-of-day. Together, they align sleep appropriately with energetic need and the day-night cycle. Neural circuits connect brain stem sites that regulate vigilance state with the suprachiasmatic nucleus (SCN), the master circadian clock, but the function of these connections has been unknown. Coupling discrete stimulation of pontine nuclei controlling vigilance state with analytical chemical measurements of intra-SCN microdialysates in mouse, we found significant neurotransmitter release at the SCN and, concomitantly, resetting of behavioral circadian rhythms. Depending upon stimulus conditions and time-of-day, SCN acetylcholine and/or glutamate levels were augmented and generated shifts of behavioral rhythms. These results establish modes of neurochemical communication from brain regions controlling vigilance state to the central circadian clock, with behavioral consequences. They suggest a basis for dynamic integration across brain systems that regulate vigilance states, and a potential vulnerability to altered communication in sleep disorders.

Original languageEnglish (US)
Article numbere70481
JournalPloS one
Volume8
Issue number8
DOIs
StatePublished - Aug 12 2013

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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