Cited by 337Circadian rhythm and melatoninPancreatic function and diabetesMetabolism, Diabetes, and Cancer

A Daily Rhythm in Glucose Tolerance

la Fleur, Susanne E., Kalsbeek, Andries, Wortel, Joke, Fekkes, Madelon L., Buijs, Ruud M.·2001·Diabetes

Abstract

The suprachiasmatic nucleus (SCN), the biological clock, is responsible for a 24-h rhythm in plasma glucose concentrations, with the highest concentrations toward the beginning of the activity period. To investigate whether the SCN is also responsible for daily fluctuations in glucose uptake and to examine how these fluctuations relate to the rhythm in plasma glucose concentrations, SCN-intact rats and SCN-lesioned rats were injected intravenously with a glucose bolus at different time points. We found an increase in glucose uptake toward the beginning of the activity period, followed by a gradual reduction in glucose uptake toward the end of the activity period. The daily variation in glucose tolerance seemed not to be caused by fluctuations in insulin responses of the pancreas but by a daily variation in insulin sensitivity. Lesioning the SCN resulted in the disappearance of the daily fluctuation in glucose uptake and insulin sensitivity. Interestingly, SCN-lesioned rats showed an enhancement in glucose tolerance that could not be explained by higher insulin responses or enhanced insulin sensitivity. Therefore, these findings suggest a role for the SCN in insulin-independent glucose uptake. The present results further show that the daily rhythm in glucose tolerance follows the same pattern as the daily rhythm in plasma glucose concentrations. We hypothesized that the biological clock prepares the individual for the upcoming activity period by two separate mechanisms: increasing plasma glucose concentrations and making tissue more tolerant to glucose.

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Crossref · 10.2337/diabetes.50.6.1237

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  • Glucose uptake showed a clear 24-h rhythm, with the highest uptake at the end of the light period.

    “Glucose uptake did indeed show a clear 24-h rhythm, but, surprisingly, with the highest uptake at the end of the light period (Figure 2; [60]).”

    From Circadian control of glucose metabolism (2014) · cites this paper as [60]

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Authors
la Fleur, S. E., Kalsbeek, A., Wortel, J., Fekkes, M. L., & Buijs, R. M.
Affiliations
Netherlands Institute for Brain Research, Amsterdam, the Netherlands
Venue
Diabetes
Published
2001-06-01
Volume
50
Issue
6
Pages
1237-1243
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2126761533
Cited by
337
References
20
Citations by year
2026: 4 · 2025: 15 · 2024: 12 · 2023: 11 · 2022: 11 · 2021: 21 · 2020: 15 · 2019: 19 · 2018: 8 · 2017: 16 · 2016: 25 · 2015: 27 · 2014: 16 · 2013: 26 · 2012: 18
FWCI
2.61
Type
journal article
Language
en
Open access
closed
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
  • Pure Amsterdam UMC (publishedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
suprachiasmatic nucleus, biological clock, circadian rhythm, glucose tolerance, glucose uptake, insulin sensitivity, insulin-independent glucose uptake, plasma glucose, SCN lesions
MeSH terms
Animals, Blood Glucose, Circadian Rhythm, Glucose, Glucose Tolerance Test, Injections, Intravenous, Insulin, Insulin Resistance, Male, Suprachiasmatic Nucleus, Rats, Wistar, Rats

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