Cited by 392Muscle metabolism and nutritionMetabolism, Diabetes, and CancerDiet, Metabolism, and Disease

Mechanism of Amino Acid-Induced Skeletal Muscle Insulin Resistance in Humans

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Krebs, Michael, Krssak, Martin, Bernroider, Elisabeth, Anderwald, Christian, Brehm, Attila, Meyerspeer, Martin, Nowotny, Peter, Roth, Erich +2 more·2002·Diabetes

Abstract

Plasma concentrations of amino acids are frequently elevated in insulin-resistant states, and a protein-enriched diet can impair glucose metabolism. This study examined effects of short-term plasma amino acid (AA) elevation on whole-body glucose disposal and cellular insulin action in skeletal muscle. Seven healthy men were studied for 5.5 h during euglycemic (5.5 mmol/l), hyperinsulinemic (430 pmol/l), fasting glucagon (65 ng/l), and growth hormone (0.4 microg/l) somatostatin clamp tests in the presence of low (approximately 1.6 mmol/l) and increased (approximately 4.6 mmol/l) plasma AA concentrations. Glucose turnover was measured with D-[6,6-(2)H(2)]glucose. Intramuscular concentrations of glycogen and glucose-6-phosphate (G6P) were monitored using (13)C and (31)P nuclear magnetic resonance spectroscopy, respectively. A approximately 2.1-fold elevation of plasma AAs reduced whole-body glucose disposal by 25% (P < 0.01). Rates of muscle glycogen synthesis decreased by 64% (180--315 min, 24 plus minus 3; control, 67 plus minus 10 micromol center dot l(-1) center dot min(-1); P < 0.01), which was accompanied by a reduction in G6P starting at 130 min (DeltaG6P(260--300 min), 18 plus minus 19; control, 103 plus minus 33 micromol/l; P < 0.05). In conclusion, plasma amino acid elevation induces skeletal muscle insulin resistance in humans by inhibition of glucose transport/phosphorylation, resulting in marked reduction of glycogen synthesis.

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Crossref · 10.2337/diabetes.51.3.599

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  • Studies of branched-chain amino acid supplementation in animals and humans indicate that circulating amino acids may directly promote insulin resistance, possibly by disrupting insulin signaling in skeletal muscle.

    “Studies of branched chain amino acid supplementation in both animals14 and humans22 indicate that circulating amino acids may directly promote insulin resistance, possibly via disruption of insulin signaling in skeletal muscle.”

    From Metabolite profiles and the risk of developing diabetes (2011) · cites this paper as [22]

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Authors
Krebs, M., Krssak, M., Bernroider, E., Anderwald, C., Brehm, A., Meyerspeer, M., Nowotny, P., Roth, E., Waldhäusl, W., & Roden, M.
Affiliations
  • University of Vienna (AT)
  • Division of Endocrinology and Metabolism, Department of Internal Medicine III, University of Vienna Medical School, Vienna, Austria
Venue
Diabetes
Published
2002-03-01
Volume
51
Issue
3
Pages
599-605
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2127459955
Cited by
392
References
54
Citations by year
2026: 10 · 2025: 10 · 2024: 16 · 2023: 21 · 2022: 26 · 2021: 15 · 2020: 25 · 2019: 12 · 2018: 23 · 2017: 16 · 2016: 29 · 2015: 14 · 2014: 22 · 2013: 23 · 2012: 24
FWCI
2.55
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
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
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diet, Metabolism, and Disease
Keywords
amino acids, skeletal muscle insulin resistance, hyperinsulinemic-euglycemic clamp, muscle glycogen synthesis, glucose-6-phosphate, glucose transport, glucose phosphorylation, hyperaminoacidemia, protein-enriched diet, glucose turnover
MeSH terms
Adenosine Diphosphate, Adult, Amino Acids, Blood Glucose, Deuterium, Epinephrine, Fasting, Glucagon, Glycogen, Humans, Hydrocortisone, Hydrogen-Ion Concentration, Insulin, Insulin Resistance, Kinetics, Male, Magnetic Resonance Spectroscopy, Phosphates, Phosphocreatine, Phosphorylation, Somatostatin, Glucose Clamp Technique, Muscle, Skeletal, Glucose-6-Phosphate, Human Growth Hormone

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