Cited by 104Muscle Physiology and DisordersMuscle metabolism and nutritionMetabolism, Diabetes, and Cancer

Chronic high fat feeding attenuates load‐induced hypertrophy in mice

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Sitnick, Mitchell, Bodine, Sue C., Rutledge, John C.·2009·The Journal of Physiology

Abstract

The incidence of obesity and obesity‐related conditions, such as metabolic syndrome and insulin resistance, is on the increase. The effect of obesity on skeletal muscle function, especially the regulation of muscle mass, is poorly understood. In this study we investigated the effect of diet‐induced obesity on the ability of skeletal muscle to respond to an imposed growth stimulus, such as increased load. Male C57BL/6 mice were randomized into two diet groups: a low fat, high carbohydrate diet (LFD) and a high fat, low carbohydrate diet (HFD) fed ad libitum for 14 weeks. Mice from each diet group were divided into two treatment groups: sedentary control or bilateral functional overload (FO) of the plantaris muscle. Mice were evaluated at 3, 7, 14 or 30 days following FO. By 14 days of FO, there was a 10% reduction (P< 0.05) in absolute growth of the plantaris in response to overload in HFD mice vs.LFD mice. By 30 days the attenuation in growth increased to 16% in HFD mice compared to LFD mice. Following FO, there was a reduction in the formation of polysomes in the HFD mice relative to the LFD mice, suggesting a decrease in protein translation. Further, activation of Akt and S6K1, in response to increased mechanical loading, was significantly attenuated in the HFD mice relative to the LFD mice. In conclusion, chronic high fat feeding impairs the ability of skeletal muscle to hypertrophy in response to increased mechanical load. This failure coincided with a failure to activate key members of the Akt/mTOR signalling pathway and increase protein translation.

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Crossref · 10.1113/jphysiol.2009.180174

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Authors
Sitnick, M., Bodine, S. C., & Rutledge, J. C.
Affiliations
University of California, Davis (US)
Venue
The Journal of Physiology
Publisher
Wiley
Published
2009-11-30
Volume
587
Issue
23
Pages
5753-5765
ISSN
  • 0022-3751 (ISSN-L)
  • 1469-7793
OpenAlex
W2100431456
Cited by
104
References
97
Citations by year
2026: 2 · 2025: 3 · 2024: 4 · 2023: 3 · 2022: 4 · 2021: 7 · 2020: 5 · 2019: 7 · 2018: 4 · 2017: 6 · 2016: 6 · 2015: 10 · 2014: 9 · 2013: 16 · 2012: 5
FWCI
2.42
Type
journal article
Language
en
Open access
Locations
  • The Journal of Physiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • University of California, Davis
  • National Heart, Lung, and Blood Institute (HL55667, R01HL055667)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
diet-induced obesity, high-fat diet, skeletal muscle hypertrophy, mechanical loading, functional overload, plantaris muscle, Akt/mTOR signaling, S6K1, mRNA translation, polysomes, muscle growth
MeSH terms
Glycogen Synthase Kinase 3 beta, Animals, Body Composition, Centrifugation, Density Gradient, Diet, Dietary Fats, Electrophoresis, Polyacrylamide Gel, Insulin, Male, Mice, Inbred C57BL, Obesity, Protein Biosynthesis, Blotting, Western, Signal Transduction, Protein Serine-Threonine Kinases, Muscle, Skeletal, Glycogen Synthase Kinase 3, Ribosomal Protein S6 Kinases, 90-kDa, Intracellular Signaling Peptides and Proteins, Oncogene Protein v-akt, Mice, Muscle Strength, TOR Serine-Threonine Kinases

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