Cited by 256Circadian rhythm and melatoninRegulation of Appetite and ObesityPancreatic function and diabetes

A Suprachiasmatic Nucleus Generated Rhythm In Basal Glucose Concentrations

La Fleur, Kalsbeek, Wortel, Buijs·1999·Journal of Neuroendocrinology

Abstract

The daily rhythm in feeding activity in mammals, as driven by the biological clock, largely determines the daily fluctuations in basal concentrations of glucose and insulin. To investigate a possible direct impact of the suprachiasmatic nucleus (SCN) on these parameters, we subjected intact rats and SCN‐lesioned rats to a fasting regimen of 36 h, or to a scheduled feeding regimen of six identical meals equally distributed over the light:dark‐cycle. Plasma profiles of glucose and insulin in rats during the final 24 h of the 36 h of fasting, and in rats subjected to the scheduled feeding regimen were compared to profiles in rats fed ad libitum. In rats fed ad libitum, in fasted rats and in rats subjected to a scheduled feeding regimen basal glucose concentrations showed a pronounced 24‐h rhythm that was not found in rats that had been SCN‐lesioned. Basal insulin levels showed a 24‐h rhythm in 50% of the rats fed ad libitum and in 50% of the rats subjected to a scheduled feeding regimen; neither rhythms were present in SCN‐lesioned rats. However, none of the fasted rats showed a 24‐h rhythm in basal insulin concentrations. These data provide clear evidence that the SCN directly controls basal glucose concentrations independent of its influence on feeding activity. At the same time, we found no consistent evidence for a strong impact of the SCN on basal insulin concentrations.

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Registry

Crossref · 10.1046/j.1365-2826.1999.00373.x

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35 of 35 references verified0 citation errors · 0 not checkable

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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 [58]

  • The SCN has a direct influence on plasma glucose concentrations independent of the feeding rhythm.

    “which clearly suggests a direct influence of the SCN on plasma glucose concentrations, independent of the feeding rhythm [58].”

    From Circadian control of glucose metabolism (2014) · cites this paper as [58]

  • The daily rhythm in basal plasma glucose concentrations of 6-meals-a-day fed animals resembled the daily rhythm observed in ad libitum fed animals.

    “In addition, the daily rhythm in basal plasma glucose concentrations of the 6-meals-a-day fed animals nicely resembled the daily rhythm – a daily rise at the time of awakening – observed in animals fed ad libitum”

    From Circadian control of glucose metabolism (2014) · cites this paper as [58]

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Authors
Fleur, L., Kalsbeek, Wortel, & Buijs
Venue
Journal of Neuroendocrinology
Publisher
Wiley
Published
1999-08
Volume
11
Issue
8
Pages
643-652
ISSN
  • 0953-8194 (ISSN-L)
  • 1365-2826
OpenAlex
W1894005404
Cited by
256
References
35
Citations by year
2026: 1 · 2025: 5 · 2024: 8 · 2023: 12 · 2022: 9 · 2021: 11 · 2020: 7 · 2019: 8 · 2018: 11 · 2017: 16 · 2016: 17 · 2015: 18 · 2014: 12 · 2013: 8 · 2012: 16
FWCI
1.77
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neuroendocrinology (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)
  • KNAW research portal (Royal Academy of Art and Sciences (KNAW)) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
Keywords
suprachiasmatic nucleus, circadian rhythm, insulin, fasting, scheduled feeding, SCN lesions, biological clock, feeding rhythm
MeSH terms
Animals, Blood Glucose, Circadian Rhythm, Corticosterone, Fasting, Food, Insulin, Male, Suprachiasmatic Nucleus, Rats, Wistar, Rats

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