Cited by 88Muscle Physiology and DisordersMuscle metabolism and nutritionMeat and Animal Product Quality

Long-term, but not short-term high-fat diet induces fiber composition changes and impaired contractile force in mouse fast-twitch skeletal muscle

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Eshima, Hiroaki, Tamura, Yoshifumi, Kakehi, Saori, Kurebayashi, Nagomi, Murayama, Takashi, Nakamura, Kyoko, Kakigi, Ryo, Okada, Takao +3 more·2017·Physiological Reports

Abstract

In this study, we investigated the effects of a short-term and long-term high-fat diet (HFD) on morphological and functional features of fast-twitch skeletal muscle. Male C57BL/6J mice were fed a HFD (60% fat) for 4 weeks (4-week HFD) or 12 weeks (12-week HFD). Subsequently, the fast-twitch extensor digitorum longus muscle was isolated, and the composition of muscle fiber type, expression levels of proteins involved in muscle contraction, and force production on electrical stimulation were analyzed. The 12-week HFD, but not the 4-week HFD, resulted in a decreased muscle tetanic force on 100 Hz stimulation compared with control (5.1 ± 1.4 N/g in the 12-week HFD vs. 7.5 ± 1.7 N/g in the control group; P < 0.05), whereas muscle weight and cross-sectional area were not altered after both HFD protocols. Morphological analysis indicated that the percentage of type IIx myosin heavy chain fibers, mitochondrial oxidative enzyme activity, and intramyocellular lipid levels increased in the 12-week HFD group, but not in the 4-week HFD group, compared with controls (P < 0.05). No changes in the expression levels of calcium handling-related proteins and myofibrillar proteins (myosin heavy chain and actin) were detected in the HFD models, whereas fast-troponin T-protein expression was decreased in the 12-week HFD group, but not in the 4-week HFD group (P < 0.05). These findings indicate that a long-term HFD, but not a short-term HFD, impairs contractile force in fast-twitch muscle fibers. Given that skeletal muscle strength largely depends on muscle fiber type, the impaired muscle contractile force by a HFD might result from morphological changes of fiber type composition.

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  • Muscle β-oxidation increases in response to a high-fat diet, but excessive lipid content or duration can exceed this capacity, leading to ectopic lipid accumulation and impaired lipid metabolism.

    “muscle β-oxidation increases in response to a high-fat diet (HFD) [83–86], although excessive lipid content or duration of such diets can exceed this capacity, leading to ectopic lipid accumulation and impaired lipid metabolism [87–91].”

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Authors
Eshima, H., Tamura, Y., Kakehi, S., Kurebayashi, N., Murayama, T., Nakamura, K., Kakigi, R., Okada, T., Sakurai, T., Kawamori, R., & Watada, H.
Affiliations
Juntendo University (JP)
Corresponding author
Tamura, Yoshifumi
Venue
Physiological Reports
Publisher
Wiley
Published
2017-04
Volume
5
Issue
7
Pages
e13250
ISSN
2051-817X (ISSN-L)
OpenAlex
W2606152260
Cited by
88
References
50
Citations by year
2026: 3 · 2025: 11 · 2024: 11 · 2023: 7 · 2022: 11 · 2021: 7 · 2020: 19 · 2019: 8 · 2018: 10 · 2017: 1
FWCI
4.24
Type
journal article
Language
en
Open access
Locations
  • Physiological Reports (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Japan Society for the Promotion of Science (16J11193, 15H06597)
  • Strategic Research Foundation at Private Universities
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 › Agricultural and Biological Sciences › Animal Science and Zoology › Meat and Animal Product Quality
Keywords
high-fat diet, fast-twitch muscle, muscle fiber composition, muscle contractile force, intramyocellular lipid, calcium handling, muscle strength, extensor digitorum longus
MeSH terms
Animals, Male, Mice, Inbred C57BL, Mitochondria, Muscle Contraction, Muscle Fibers, Fast-Twitch, Myosin Heavy Chains, Lipid Metabolism, Mice, Diet, High-Fat

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