Cited by 52Circadian rhythm and melatoninMetabolism, Diabetes, and CancerAdipose Tissue and Metabolism

Skeletal muscle insulin sensitivity show circadian rhythmicity which is independent of exercise training status

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Basse, Astrid L., Dalbram, Emilie, Larsson, Louise, Gerhart-Hines, Zach, Zierath, Juleen R., Treebak, Jonas T.·2018·Frontiers in Physiology

Abstract

Circadian rhythms can be perturbed by shift work, travel across time zones, occupational tasks, or genetic mutations. Perturbed circadian rhythms are associated with the increasing problem of obesity, metabolic dysfunction and insulin resistance. We hypothesized that insulin sensitivity in skeletal muscle follows a circadian pattern and that this pattern is important for overall metabolic function. This hypothesis was verified using mice as a model system. We observed circadian rhythmicity in whole body insulin tolerance, as well as in signaling pathways regulating insulin- and exercise-induced glucose uptake in skeletal muscle, including AKT, 5'-adenosine monophosphate-activated protein kinase (AMPK) and TBC1 domain family member 4 (TBC1D4) phosphorylation. Basal and insulin-stimulated glucose uptake in skeletal muscle and adipose tissues in vivo also differed between day- and nighttime. However, the rhythmicity of glucose uptake differed from the rhythm of whole-body insulin tolerance. These results indicate that neither skeletal muscle nor adipose tissue play a major role for the circadian rhythmicity in whole-body insulin tolerance. To study the circadian pattern of insulin sensitivity directly in skeletal muscle, we determined glucose uptake under basal and submaximal insulin-stimulated conditions ex vivo every sixth hour. Both insulin sensitivity and signaling of isolated skeletal muscle peaked during the dark period. We next examined the effect of exercise training on the circadian rhythmicity of insulin sensitivity. As expected, voluntary exercise training enhanced glucose uptake in skeletal muscle. Nevertheless, exercise training did not affect the circadian rhythmicity of skeletal muscle insulin sensitivity. Taken together, our results provide evidence that skeletal muscle insulin sensitivity exhibits circadian rhythmicity.

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  • Hypercortisolism induced by chronic stress, Cushing's syndrome, or medication is a known risk factor for the development of diabetes.

    “For instance, hypercortisolism induced by chronic stress, Cushing’s syndrome, or medication is a known risk factor for the development of diabetes.”

    From Mathematical Modelling of Endocrine Systems (2019) · cites this paper as [81]

    The Introduction discusses diurnal changes in glucose tolerance and insulin sensitivity, not hypercortisolism as a diabetes risk factor. Searches for chronic stress, Cushing’s syndrome, medication, cortisol, and glucocorticoids found no passage in our copy addressing the claimed risk. (LLM, conf=0.76)

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Authors
Basse, A. L., Dalbram, E., Larsson, L., Gerhart-Hines, Z., Zierath, J. R., & Treebak, J. T.
Affiliations
University of Copenhagen (DK)
Corresponding author
Treebak, Jonas T.
Venue
Frontiers in Physiology
Published
2018-08-28
Volume
9
Pages
1198-1198
ISSN
1664-042X (ISSN-L)
OpenAlex
W2889056797
Cited by
52
References
37
Citations by year
2026: 6 · 2025: 7 · 2024: 6 · 2023: 4 · 2022: 8 · 2021: 4 · 2020: 10 · 2019: 6 · 2018: 1
FWCI
2.96
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Physiology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (publishedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Novo Nordisk Fonden (14OC0011493, 14OC0009315)
  • Det Frie Forskningsråd (4004-00235)
  • European Foundation for the Study of Diabetes (EFSD/Lilly Research Fellowship)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
Keywords
circadian rhythm, skeletal muscle insulin sensitivity, insulin tolerance, glucose uptake, exercise training, AMPK, Akt, TBC1D4, adipose tissue, insulin signaling, circadian rhythm disruption, insulin resistance

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