Cited by 90Circadian rhythm and melatoninPancreatic function and diabetesHypothalamic control of reproductive hormones

Role of SCN in Daily Rhythms of Plasma Glucose, FFA, Insulin and Glucagon

Yamamoto, Hideki, Nagai, Katsuya, Nakagawa, Hachiro·1987·Chronobiology International

Abstract

The daily changes in plasma glucose, FFA, insulin and glucagon concentrations in rats under 12 hr-12 hr light-dark conditions, and the role of the suprachiasmatic nucleus (SCN) of the hypothalamus in these changes were examined. In sham-operated rats, the four parameters showed significant daily rhythms. However, after bilateral lesions of the SCN, daily rhythms could not be detected in these parameters under the present experimental conditions. Furthermore, after the SCN lesions the plasma glucose concentration remained at the minimum level of that in sham-operated rats, while the plasma insulin and glucagon concentrations reduced to approximately the mean level and about half the minimum level of sham-operated rats, respectively, and the FFA concentration lowered to somewhat below the minimum level. Gradual increase in the plasma insulin concentration at the end of the light period was observed in intact rats even after starvation for 24 hr. These findings suggest that the SCN is essential for generation of the daily changes in the plasma glucose, FFA, insulin and glucagon concentrations and also that it plays critical roles in regulation of the secretion of pancreatic hormones. The gradual increase in the plasma insulin level observed at the end of the light period is discussed in connection with initiation of spontaneous feeding behaviour.

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Crossref · 10.3109/07420528709078539

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  • SCN lesions abolish the daily rhythms in plasma concentrations of glucose and insulin.

    “Nagai and Nakagawa, who showed that SCN lesions abolished the daily rhythms in plasma concentrations of glucose and insulin [53]”

    From Circadian control of glucose metabolism (2014) · cites this paper as [53]

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Authors
Yamamoto, H., Nagai, K., & Nakagawa, H.
Affiliations
Institute for Protein Research, The University of Osaka (JP)
Venue
Chronobiology International
Published
1987-01
Volume
4
Issue
4
Pages
483-491
ISSN
  • 0742-0528 (ISSN-L)
  • 1525-6073
OpenAlex
W2134513259
Cited by
90
References
28
Citations by year
2025: 1 · 2024: 3 · 2023: 2 · 2022: 2 · 2021: 3 · 2020: 3 · 2019: 3 · 2018: 5 · 2017: 5 · 2016: 7 · 2015: 5 · 2014: 2 · 2013: 7 · 2012: 3
FWCI
0.29
Type
journal article
Language
en
Open access
closed
Locations
  • Chronobiology International (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
suprachiasmatic nucleus, circadian rhythm, plasma glucose, free fatty acids, insulin, glucagon, hypothalamic lesions, light-dark cycle, pancreatic hormone secretion, fasting, feeding behaviour, rats
MeSH terms
Animals, Blood Glucose, Circadian Rhythm, Fatty Acids, Nonesterified, Glucagon, Insulin, Male, Rats, Inbred Strains, Suprachiasmatic Nucleus, Rats

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