Cited by 185Circadian rhythm and melatoninDietary Effects on HealthDiabetes Management and Research

Influences of Breakfast on Clock Gene Expression and Postprandial Glycemia in Healthy Individuals and Individuals With Diabetes: A Randomized Clinical Trial

Jakubowicz, Daniela, Wainstein, Julio, Landau, Zohar, Raz, Itamar, Ahren, Bo, Chapnik, Nava, Ganz, Tali, Menaged, Miriam +3 more·2017·Diabetes Care

Abstract

OBJECTIVE The circadian clock regulates glucose metabolism by mediating the activity of metabolic enzymes, hormones, and transport systems. Breakfast skipping and night eating have been associated with high HbA1c and postprandial hyperglycemia after lunch and dinner. Our aim was to explore the acute effect of breakfast consumption or omission on glucose homeostasis and clock gene expression in healthy individuals and individuals with type 2 diabetes. RESEARCH DESIGN AND METHODS In a crossover design, 18 healthy volunteers and 18 volunteers with 14.5 ± 1.5 years diabetes, BMI 30.7 ± 1.1 kg/m2, and HbA1c 7.6 ± 0.1% (59.6 ± 0.8 mmol/mol) were randomly assigned to a test day with breakfast and lunch (YesB) and a test day with only lunch (NoB). Postprandial clock and clock-controlled gene expression, plasma glucose, insulin, intact glucagon-like peptide 1 (iGLP-1), and dipeptidyl peptidase IV (DPP-IV) plasma activity were assessed after breakfast and lunch. RESULTS In healthy individuals, the expression level of Per1, Cry1, Rorα, and Sirt1 was lower (P < 0.05) but Clock was higher (P < 0.05) after breakfast. In contrast, in individuals with type 2 diabetes, Per1, Per2, and Sirt1 only slightly, but significantly, decreased and Rorα increased (P < 0.05) after breakfast. In healthy individuals, the expression level of Bmal1, Rorα, and Sirt1 was higher (P < 0.05) after lunch on YesB day, whereas the other clock genes remained unchanged. In individuals with type 2 diabetes, Bmal1, Per1, Per2, Rev-erbα, and Ampk increased (P < 0.05) after lunch on the YesB day. Omission of breakfast altered clock and metabolic gene expression in both healthy and individuals with type 2 diabetes. CONCLUSIONS Breakfast consumption acutely affects clock and clock-controlled gene expression leading to normal oscillation. Breakfast skipping adversely affects clock and clock-controlled gene expression and is correlated with increased postprandial glycemic response in both healthy individuals and individuals with diabetes.

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Crossref · 10.2337/dc16-2753

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Authors
Jakubowicz, D., Wainstein, J., Landau, Z., Raz, I., Ahren, B., Chapnik, N., Ganz, T., Menaged, M., Barnea, M., Bar-Dayan, Y., & Froy, O.
Affiliations
  • Tel Aviv University (IL)
  • Hebrew University of Jerusalem (IL)
  • Department of Clinical Sciences, Faculty of Medicine, Lund University, Lund, Sweden
  • Weizmann Institute of Science (IL)
  • Diabetes Unit, Wolfson Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Holon, Israel
Corresponding author
  • Jakubowicz, Daniela
  • Froy, Oren
Venue
Diabetes Care
Published
2017-08-22
Volume
40
Issue
11
Pages
1573-1579
ISSN
  • 0149-5992 (ISSN-L)
  • 1935-5548
OpenAlex
W2745443951
Cited by
178
References
39
Citations by year
2026: 10 · 2025: 19 · 2024: 28 · 2023: 24 · 2022: 25 · 2021: 26 · 2020: 21 · 2019: 16 · 2018: 8 · 2017: 1
FWCI
7.69
Type
journal article
Language
en
Open access
closed
Locations
  • Diabetes Care (publishedVersion)
  • PubMed (publishedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
Funders
Ministry of Health, Israel (3-0000-11406)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Physiology › Dietary Effects on Health
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
Keywords
breakfast skipping, clock genes, circadian clock, postprandial blood glucose, type 2 diabetes, glucose homeostasis, Per1, Per2, Bmal1, RORα, SIRT1, glucagon-like peptide-1, dipeptidyl peptidase IV, insulin, circadian rhythm
MeSH terms
Adult, Aged, Blood Glucose, Diabetes Mellitus, Type 2, Gene Expression Regulation, Glycated Hemoglobin, Homeostasis, Humans, Insulin, Middle Aged, Body Mass Index, Cross-Over Studies, Postprandial Period, Glucagon-Like Peptide 1, AMP-Activated Protein Kinases, Sirtuin 1, ARNTL Transcription Factors, Period Circadian Proteins, Circadian Clocks, Breakfast

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