Circadian Disruption Leads to Insulin Resistance and Obesity
Open accessAbstract
Background Disruption of circadian (daily) timekeeping enhances the risk of metabolic syndrome, obesity, and type 2 diabetes. While clinical observations have suggested that insulin action is not constant throughout the 24 hr cycle, its magnitude and periodicity have not been assessed. Moreover, when circadian rhythmicity is absent or severely disrupted, it is not known whether insulin action will lock to the peak, nadir, or mean of the normal periodicity of insulin action. Results We used hyperinsulinemic-euglycemic clamps to show a bona fide circadian rhythm of insulin action; mice are most resistant to insulin during their daily phase of relative inactivity. Moreover, clock-disrupted Bmal1-knockout mice are locked into the trough of insulin action and lack rhythmicity in insulin action and activity patterns. When rhythmicity is rescued in the Bmal1-knockout mice by expression of the paralogous gene Bmal2, insulin action and activity patterns are restored. When challenged with a high-fat diet, arhythmic mice (either Bmal1-knockout mice or wild-type mice made arhythmic by exposure to constant light) were obese prone. Adipose tissue explants obtained from high-fat-fed mice have their own periodicity that was longer than animals on a chow diet. Conclusions This study provides rigorous documentation for a circadian rhythm of insulin action and demonstrates that disturbing the natural rhythmicity of insulin action will disrupt the rhythmic internal environment of insulin sensitive tissue, thereby predisposing the animals to insulin resistance and obesity.
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Long-term desynchronization of circadian rhythms is associated with adverse metabolic health effects, including weight gain, increased body fat, obesity, impaired glucose tolerance, insulin resistance, higher blood pressure, elevated cholesterol levels, and elevated risk for cardiovascular diseases, diabetes, and metabolic syndrome.
“Long-term desynchronization of circadian rhythms is associated with adverse metabolic health effects, including weight gain, increased body fat, obesity, impaired glucose tolerance, insulin resistance, higher blood pressure, and elevated cholesterol levels, as well as elevated risk for cardiovascular diseases, diabetes, and metabolic syndrome (18, 47–54).”
From Meal timing and its role in obesity and associated diseases (2024) · cites this paper as [51]
The Introduction links circadian desynchrony to disrupted body-weight and glucose/lipid regulation and to obesity, metabolic syndrome, and type 2 diabetes. The Discussion reports insulin resistance, elevated fasting glucose, and fat accumulation in clock-disrupted mice. The paper does not establish the full list: it does not report higher blood pressure, elevated cholesterol levels, or cardiovascular-disease risk as effects of long-term desynchronization, and it discusses glucose tolerance without reporting impaired tolerance as a result. (LLM, conf=0.85)
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- Authors
- Shi, S.-Q., Ansari, T. S., McGuinness, O. P., Wasserman, D. H., & Johnson, C. H.
- Affiliations
- Vanderbilt University (US)
- Corresponding author
- Johnson, Carl Hirschie
- Venue
- Current Biology
- Publisher
- Elsevier BV
- Published
- 2013-03
- Volume
- 23
- Issue
- 5
- Pages
- 372-381
- ISSN
- 0960-9822 (ISSN-L)
- PMC
- PMC3595381
- OpenAlex
- W2007247773
- Cited by
- 452
- References
- 6
- Citations by year
- 2026: 19 · 2025: 25 · 2024: 27 · 2023: 42 · 2022: 38 · 2021: 34 · 2020: 36 · 2019: 36 · 2018: 30 · 2017: 30 · 2016: 37 · 2015: 40 · 2014: 42 · 2013: 14 · 2012: 1
- FWCI
- 23.94
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Current Biology (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institutes of Health (5p60dk020593-31)
- National Heart, Lung, and Blood Institute (R21HL102492)
- National Institute of Mental Health (R21MH065910)
- National Institute of Diabetes and Digestive and Kidney Diseases (P60-DK020593, U24DK059637, 2P60DK020593, DK 059637, U24DK076169)
- Topics
- Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
- Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
- Health Sciences › Medicine › Physiology › Dietary Effects on Health
- Keywords
- circadian rhythm, insulin action, insulin resistance, obesity, Bmal1, clock genes, metabolic syndrome, type 2 diabetes, high-fat diet, adipose tissue, constant light, activity patterns, hyperinsulinemic-euglycemic clamp
- MeSH terms
- Animals, Circadian Rhythm, Insulin, Insulin Resistance, Male, Obesity, Glucose Clamp Technique, Mice, Knockout, Mice, ARNTL Transcription Factors, Diet, High-Fat
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