Sleep restriction acutely impairs glucose tolerance in rats
Pawan K Jha1, Ewout Foppen2, Andries Kalsbeek3
1Department of Endocrinology and Metabolism, Academic Medical Center (AMC), University of Amsterdam, Amsterdam, the Netherlands Hypothalamic Integration Mechanisms, Netherlands Institute for Neuroscience, Amsterdam, the Netherlands Regulation of Circadian Clocks team, Institute of Cellular and Integrative Neurosciences UPR3212 Centre National de la Recherche Scientifique (CNRS) University of Strasbourg, Strasbourg, France International Associated Laboratory LIA1061 Understanding the Neural Basis of Diurnality, CNRS, France and the Netherlands kj.pawan@gmail.com.
Short sleep deprivation impairs glucose tolerance in rats by reducing insulin response. This acute sleep restriction negatively affects glucose homeostasis, even without changes in basal glucose or insulin levels.
Area of Science:
- Endocrinology
- Metabolic Science
- Sleep Research
Background:
- Chronic sleep curtailment is linked to impaired glucose metabolism in humans.
- Understanding the mechanisms of sleep deprivation on glucose regulation is crucial.
Purpose of the Study:
- To investigate the impact of acute sleep deprivation on glucose tolerance in rats.
- To determine if the timing of sleep deprivation influences its effects on glucose metabolism.
Main Methods:
- Rats underwent 4-hour sleep deprivation during their early rest period or later in the light phase.
- Food was withdrawn during deprivation to isolate sleep effects from feeding.
- Intravenous glucose tolerance tests (IVGTT) were conducted post-deprivation.
Main Results:
- Sleep deprivation impaired glucose tolerance in rats, regardless of timing.
- A significant reduction in early-phase insulin response to glucose was observed.
- Basal glucose, insulin, and corticosterone levels remained unchanged post-deprivation.
Conclusions:
- Acute, short sleep deprivation negatively impacts glucose homeostasis in rats.
- The primary mechanism appears to be an attenuated first-phase insulin response.
- This highlights the sensitivity of glucose regulation to even brief sleep restriction.
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