Cited by 170Circadian rhythm and melatoninPancreatic function and diabetesRegulation of Appetite and Obesity

The daily rhythm in plasma glucagon concentrations in the rat is modulated by the biological clock and by feeding behavior

Ruiter, Marieke, La Fleur, Susanne E., van Heijningen, Caroline, van der Vliet, Jan, Kalsbeek, Andries, Buijs, Ruud M.·2003·Diabetes

Abstract

Plasma glucose concentrations display a daily rhythm generated by the hypothalamic biological clock, located in the suprachiasmatic nucleus (SCN). How the SCN orchestrates this rhythm is unknown. Because glucagon stimulates hepatic glucose production, we hypothesized that if glucagon has a daily rhythm, then it may be responsible for the glucose rhythm. From hourly blood samples, we determined daily glucagon concentrations for intact and SCN-lesioned rats. Intact ad libitum-fed rats showed a clear daily glucagon rhythm, and fasting resulted in an even more pronounced rhythm. It is interesting that a decrease in glucagon concentrations, instead of the expected increase, occurred already shortly after food removal. Toward the start of the active period, a peak in glucagon levels occurred, with concentrations similar to those measured in ad libitum-fed rats. SCN lesions abolished rhythmicity in plasma glucagon profiles. Scheduled-fed rats showed meal-induced glucagon peaks but also a daily rhythm in basal premeal glucagon concentrations. Plasma glucose concentrations of ad libitum-and scheduled-fed rats, however, were similar. In conclusion, feeding and the biological clock control 24-h plasma glucagon concentrations. In fed rats, glucagon is not responsible for the daily glucose rhythm. During fasting, however, glucagon may contribute to energy mobilization when the activity period starts.

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Crossref · 10.2337/diabetes.52.7.1709

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  • We did not find an obvious and direct influence of the SCN on basal plasma insulin or glucagon concentrations.

    “On the other hand, we did not find an obvious and direct influence of the SCN on basal plasma insulin or glucagon concentrations [58,59].”

    From Circadian control of glucose metabolism (2014) · cites this paper as [59]

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Authors
Ruiter, M., La Fleur, S. E., van Heijningen, C., van der Vliet, J., Kalsbeek, A., & Buijs, R. M.
Affiliations
  • Netherlands Institute for Neuroscience (NL)
  • From the Netherlands Institute for Brain Research, Amsterdam, the Netherlands
Venue
Diabetes
Published
2003-07-01
Volume
52
Issue
7
Pages
1709-1715
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2103026809
Cited by
170
References
51
Citations by year
2026: 1 · 2025: 6 · 2024: 8 · 2023: 4 · 2022: 10 · 2021: 11 · 2020: 6 · 2019: 5 · 2018: 13 · 2017: 14 · 2016: 8 · 2015: 13 · 2014: 11 · 2013: 12 · 2012: 11
FWCI
2.19
Type
journal article
Language
en
Open access
closed
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
  • Pure Amsterdam UMC (publishedVersion)
  • KNAW Research Portal (The Royal Netherlands Academy of Arts and Sciences) (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 › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
glucagon, circadian rhythm, suprachiasmatic nucleus, biological clock, feeding behavior, fasting, plasma glucose, hepatic glucose production, energy mobilization
MeSH terms
Animals, Biological Clocks, Circadian Rhythm, Eating, Fasting, Glucagon, Male, Rats, Wistar, Rats

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