Cited by 87Dietary Effects on HealthDiabetes, Cardiovascular Risks, and LipoproteinsDiabetes Management and Research

Effects of fasting on insulin action and glucose kinetics in lean and obese men and women

Bergman, Bryan C., Cornier, Marc-Andre, Horton, Tracy J., Bessesen, Daniel H.·2007·American Journal of Physiology-Endocrinology and Metabolism

Abstract

The development of insulin resistance in the obese individual could impair the ability to appropriately adjust metabolism to perturbations in energy balance. We investigated a 12- vs. 48-h fast on hepatic glucose production (R a ), peripheral glucose uptake (R d ), and skeletal muscle insulin signaling in lean and obese subjects. Healthy lean [ n = 14; age = 28.0 ± 1.4 yr; body mass index (BMI) = 22.8 ± 0.42] and nondiabetic obese ( n = 11; age = 34.6 ± 2.3 yr; BMI = 36.1 ± 1.5) subjects were studied following a 12- and 48-h fast during 2 h of rest and a 3-h 40 mU·m −2 ·min −1 hyperinsulinemic-euglycemic clamp (HEC). Basal glucose R a decreased significantly from the 12- to 48-h fast (lean 1.96 ± 0.23 to 1.63 ± 0.15; obese 1.23 ± 0.07 to 1.07 ± 0.07 mg·kg −1 ·min −1 ; P = 0.004) and was equally suppressed during the HEC after both fasts. The increase in glucose R d during the HEC after the 12-h fast was significantly decreased in lean and obese subjects after the 48-h fast (lean 9.03 ± 1.17 to 4.16 ± 0.34, obese 6.10 ± 0.77 to 3.56 ± 0.30 mg·kg FFM −1 ·min −1 ; P < 0.001). After the 12- but not the 48-h fast, insulin-stimulated AKT Ser 473 phosphorylation was greater in lean than obese subjects. We conclude that 1) 48 h of fasting produces a marked decline in peripheral insulin action, while suppression of hepatic glucose production is maintained in lean and obese men and women; and 2) the magnitude of this decline is greater in lean vs. obese subjects.

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Crossref · 10.1152/ajpendo.00613.2006

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Authors
Bergman, B. C., Cornier, M.-A., Horton, T. J., & Bessesen, D. H.
Venue
American Journal of Physiology-Endocrinology and Metabolism
Published
2007-10
Volume
293
Issue
4
Pages
E1103-E1111
ISSN
  • 0193-1849 (ISSN-L)
  • 1522-1555
OpenAlex
W2155793170
Cited by
87
References
52
Citations by year
2026: 5 · 2025: 5 · 2024: 1 · 2023: 3 · 2022: 4 · 2021: 5 · 2020: 4 · 2019: 4 · 2018: 3 · 2017: 5 · 2016: 8 · 2015: 3 · 2014: 3 · 2013: 4 · 2012: 5
FWCI
5.12
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Endocrinology and Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of Diabetes and Digestive and Kidney Diseases (K24DK002935, F32DK059739, DK-02935, DK-059739)
  • National Center for Research Resources (K23RR016185, RR.00036)
Topics
  • Health Sciences › Medicine › Physiology › Dietary Effects on Health
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
Keywords
fasting, insulin resistance, obesity, hepatic glucose production, peripheral glucose uptake, skeletal muscle insulin signaling, Akt Ser473 phosphorylation, hyperinsulinemic-euglycemic clamp, energy balance
MeSH terms
Adult, Basal Metabolism, Blood Glucose, Fasting, Fatty Acids, Nonesterified, Female, Humans, Insulin, Male, Obesity, Pulmonary Gas Exchange, Receptor, Insulin, Thinness, Glucose Clamp Technique, Muscle, Skeletal

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