Cited by 102Muscle metabolism and nutritionMetabolism, Diabetes, and CancerMuscle Physiology and Disorders

Lipid-Induced Insulin Resistance Is Associated With an Impaired Skeletal Muscle Protein Synthetic Response to Amino Acid Ingestion in Healthy Young Men

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Stephens, Francis B., Chee, Carolyn, Wall, Benjamin T., Murton, Andrew J., Shannon, Chris E., van Loon, Luc J.C., Tsintzas, Kostas·2015·Diabetes

Abstract

The ability to maintain skeletal muscle mass appears to be impaired in insulin-resistant conditions, such as type 2 diabetes, that are characterized by muscle lipid accumulation. The current study investigated the effect of acutely increasing lipid availability on muscle protein synthesis. Seven healthy young male volunteers underwent a 7-h intravenous infusion of l-[ring-2H5]phenylalanine on two randomized occasions combined with 0.9% saline or 10% Intralipid at 100 mL/h. After a 4-h “basal” period, a 21-g bolus of amino acids was administered and a 3-h hyperinsulinemic-euglycemic clamp was commenced (“fed” period). Muscle biopsy specimens were obtained from the vastus lateralis at 1.5, 4, and 7 h. Lipid infusion reduced fed whole-body glucose disposal by 20%. Furthermore, whereas the mixed muscle fractional synthetic rate increased from the basal to the fed period during saline infusion by 2.2-fold, no change occurred during lipid infusion, despite similar circulating insulin and leucine concentrations. This “anabolic resistance” to insulin and amino acids with lipid infusion was associated with a complete suppression of muscle 4E-BP1 phosphorylation. We propose that increased muscle lipid availability may contribute to anabolic resistance in insulin-resistant conditions by impairing translation initiation.

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Registry

Crossref · 10.2337/db14-0961

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Authors
Stephens, F. B., Chee, C., Wall, B. T., Murton, A. J., Shannon, C. E., van Loon, L. J. C., & Tsintzas, K.
Affiliations
  • University of Nottingham (GB)
  • Maastricht University (NL)
  • School for Nutrition, Toxicology and Metabolism, Maastricht University, Maastricht, the Netherlands
Corresponding author
Stephens, Francis B.
Venue
Diabetes
Published
2014-12-18
Volume
64
Issue
5
Pages
1615-1620
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2161782364
Cited by
102
References
25
Citations by year
2026: 3 · 2025: 8 · 2024: 4 · 2023: 6 · 2022: 4 · 2021: 11 · 2020: 10 · 2019: 11 · 2018: 15 · 2017: 7 · 2016: 18 · 2015: 5
FWCI
4.95
Type
journal article
Language
en
Licence
other-oa
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
  • Research Publications (Maastricht University) (publishedVersion, other-oa)
  • Open Research Exeter (University of Exeter) (acceptedVersion)
  • Repository@Nottingham (University of Nottingham) (submittedVersion, cc-by)
  • Research Bank (Australian Catholic University) (submittedVersion)
  • Nottingham ePrints (University of Nottingham) (submittedVersion, cc-by)
  • Figshare (submittedVersion)
  • Research Publications (Maastricht University) (submittedVersion, other-oa)
Funders
  • British Nutrition Foundation
  • Universiteit Maastricht
  • Medical Research Council (MR/K00414X/1)
Topics
  • 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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
Keywords
insulin resistance, skeletal muscle protein synthesis, muscle lipid accumulation, Intralipid infusion, amino acid ingestion, hyperinsulinemic-euglycemic clamp, 4E-BP1 phosphorylation, translation initiation, anabolic resistance, type 2 diabetes, muscle mass preservation, glucose disposal
MeSH terms
Amino Acids, Emulsions, Gene Expression Regulation, Glucose, Humans, Insulin Resistance, Male, Muscle Proteins, Phospholipids, Soybean Oil, Signal Transduction, Muscle, Skeletal, Young Adult

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