Amyloid-β Dynamics Are Regulated by Orexin and the Sleep-Wake Cycle

Sep 26, 2009Science (New York, N.Y.)

Orexin and the sleep-wake cycle influence amyloid-beta levels

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Abstract

The amount of interstitial fluid amyloid-beta (ISF Abeta) in mice is correlated with wakefulness.

  • ISF Abeta levels increased significantly during acute sleep deprivation.
  • ISF Abeta levels rose with orexin infusion and fell with the use of a dual orexin receptor antagonist.
  • Chronic sleep restriction significantly increased Abeta plaque formation in amyloid precursor protein transgenic mice.
  • A dual orexin receptor antagonist was associated with a decrease in Abeta plaque formation.

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