Ketone body metabolism and sleep homeostasis in mice

Neuropharmacology
Sachiko ChikahisaHiroyoshi Séi

Abstract

A link has been established between energy metabolism and sleep homeostasis. The ketone bodies acetoacetate and β-hydroxybutyrate, generated from the breakdown of fatty acids, are major metabolic fuels for the brain under conditions of low glucose availability. Ketogenesis is modulated by the activity of peroxisome proliferator-activated receptor alpha (PPARα), and treatment with a PPAR activator has been shown to induce a marked increase in plasma acetoacetate and decreased β-hydroxybutyrate in mice, accompanied by increased slow-wave activity during non-rapid eye movement (NREM) sleep. The present study investigated the role of ketone bodies in sleep regulation. Six-hour sleep deprivation increased plasma ketone bodies and their ratio (acetoacetate/β-hydroxybutyrate) in 10-week-old male mice. Moreover, sleep deprivation increased mRNA expression of ketogenic genes such as PPARα and 3-hydroxy-3-methylglutarate-CoA synthase 2 in the brain and decreased ketolytic enzymes such as succinyl-CoA: 3-oxoacid CoA transferase. In addition, central injection of acetoacetate, but not β-hydroxybutyrate, markedly increased slow-wave activity during NREM sleep and suppressed glutamate release. Central metabolism of ketone bodies, especially ...Continue Reading

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Citations

Feb 13, 2015·Proceedings of the National Academy of Sciences of the United States of America·Aalim M WeljieAmita Sehgal
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