Cited by 898Metabolism, Diabetes, and CancerAdipokines, Inflammation, and Metabolic DiseasesAdipose Tissue and Metabolism

Interleukin-6 Increases Insulin-Stimulated Glucose Disposal in Humans and Glucose Uptake and Fatty Acid Oxidation In Vitro via AMP-Activated Protein Kinase

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Carey, Andrew L., Steinberg, Gregory R., Macaulay, S. Lance, Thomas, Walter G., Holmes, Anna G., Ramm, Georg, Prelovsek, Oja, Hohnen-Behrens, Cordula +5 more·2006·Diabetes

Abstract

Although interleukin-6 (IL-6) has been associated with insulin resistance, little is known regarding the effects of IL-6 on insulin sensitivity in humans in vivo. Here, we show that IL-6 infusion increases glucose disposal without affecting the complete suppression of endogenous glucose production during a hyperinsulinemic-euglycemic clamp in healthy humans. Because skeletal muscle accounts for most of the insulin-stimulated glucose disposal in vivo, we examined the mechanism(s) by which IL-6 may affect muscle metabolism using L6 myotubes. IL-6 treatment increased fatty acid oxidation, basal and insulin-stimulated glucose uptake, and translocation of GLUT4 to the plasma membrane. Furthermore, IL-6 rapidly and markedly increased AMP-activated protein kinase (AMPK). To determine whether the activation of AMPK mediated cellular metabolic events, we conducted experiments using L6 myotubes infected with dominant-negative AMPK alpha-subunit. The effects described above were abrogated in AMPK dominant-negative-infected cells. Our results demonstrate that acute IL-6 treatment enhances insulin-stimulated glucose disposal in humans in vivo, while the effects of IL-6 on glucose and fatty acid metabolism in vitro appear to be mediated by AMPK.

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Crossref · 10.2337/db05-1404

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  • IL-6 released during exercise promotes insulin-independent glucose uptake by inducing translocation of GLUT4 transporters in adipose tissue via PI3K/Akt signaling.

    “While IL-6 released during exercise promotes insulin-independent glucose uptake by inducing the translocation of GLUT4 transporters in adipose tissue via the phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway”

    From Exercise-Induced Muscle–Fat Crosstalk: Molecular Mediators and Their Pharmacological Modulation for the Maintenance of Metabolic Flexibility in Aging (2025) · cites this paper as [50]

    The paper reports that IL-6 increases basal glucose transport in cultured 3T3-L1 adipocytes, and that it increases GLUT4 translocation in L6 myotubes (Results; page unavailable). It does not show GLUT4 translocation in adipocytes or attribute the effect to PI3K/Akt signaling: the muscle-cell results found no evidence that IL-6 alone increased those insulin-signaling processes, and the paper instead emphasizes AMPK. Its link between exercise-released IL-6 and these effects is suggested, not directly tested. (LLM, conf=0.89)

    Experimental — accuracy not yet measured
  • Exercise-inducible myokines irisin, IL-6, IL-15, BAIBA, and METRNL, as well as osteokine OCN, directly stimulate oxidative metabolism in autocrine and endocrine ways.

    “Exercise-inducible myokines, such as irisin [62,63], IL-6 [76,77], IL-15 [91,126], BAIBA [111], and METRNL [100], as well as the osteokine OCN [71] have been shown to directly stimulate oxidative metabolism in autocrine and endocrine ways, respectively (1).”
  • IL-6 promotes hepatic gluconeogenesis by activating key gluconeogenic enzymes including PEPCK and G-6-Pase.

    “IL-6 also promotes hepatic gluconeogenesis by activating key gluconeogenic enzymes, including phosphoenolpyruvate carboxykinase (PEPCK) and glucose-6-phosphatase (G-6-Pase) [49,50].”

    From Exercise-Induced Muscle–Fat Crosstalk: Molecular Mediators and Their Pharmacological Modulation for the Maintenance of Metabolic Flexibility in Aging (2025) · cites this paper as [50]

    The section on endogenous glucose production reports that IL-6 did not change its suppression during an insulin clamp in healthy humans. Our copy does not address whether IL-6 activates hepatic PEPCK or G-6-Pase or promotes gluconeogenesis through those enzymes (searched: PEPCK, glucose-6-phosphatase, hepatic gluconeogenesis). The clamp result alone does not settle that distinct mechanistic claim. (LLM, conf=0.72)

    Experimental — accuracy not yet measured
  • IL-6 can increase intramyocellular or whole body fatty acid oxidation via AMPK activation.

    “Several other studies have described that IL-6 can increase intramyocellular (58-60) or whole body (61) fatty acid oxidation via AMPK activation (58, 62).”

    From Muscle–Organ Crosstalk: The Emerging Roles of Myokines (2020) · cites this paper as [58]

  • IL-6 increases both basal glucose uptake and glucose transporter GLUT4 translocation.

    “It is well documented that IL-6 increases both basal glucose uptake and glucose transporter GLUT4 translocation (58).”

    From Muscle–Organ Crosstalk: The Emerging Roles of Myokines (2020) · cites this paper as [58]

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Authors
Carey, A. L., Steinberg, G. R., Macaulay, S. L., Thomas, W. G., Holmes, A. G., Ramm, G., Prelovsek, O., Hohnen-Behrens, C., Watt, M. J., James, D. E., Kemp, B. E., Pedersen, B. K., & Febbraio, M. A.
Affiliations
  • The University of Melbourne (AU)
  • Commonwealth Scientific and Industrial Research Organisation (AU)
  • Baker Heart and Diabetes Institute (AU)
  • RMIT University (AU)
  • Garvan Institute of Medical Research (AU)
  • University of Copenhagen (DK)
Venue
Diabetes
Published
2006-10-01
Volume
55
Issue
10
Pages
2688-2697
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2109384991
Cited by
898
References
48
Citations by year
2026: 30 · 2025: 49 · 2024: 48 · 2023: 64 · 2022: 55 · 2021: 45 · 2020: 50 · 2019: 46 · 2018: 51 · 2017: 53 · 2016: 40 · 2015: 42 · 2014: 50 · 2013: 59 · 2012: 44
FWCI
13.72
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
  • UCLA - Biblioteca de Ciencias de la Salud (submittedVersion)
  • RMIT Research Repository (RMIT University Library) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
  • Heart and Stroke Foundation of Canada
  • Canadian Diabetes Association
  • Sundhed og Sygdom, Det Frie Forskningsråd (22-01-009)
  • National Research Foundation
  • Danmarks Grundforskningsfond (22-01-009, LSHM-CT-2004-005272)
  • Javna Agencija za Raziskovalno Dejavnost RS
  • Univerza v Ljubljani
  • Canadian Institutes of Health Research
  • Medical Research Council
  • Australian Research Council
  • National Health and Medical Research Council (251558)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
Keywords
interleukin-6, insulin sensitivity, insulin-stimulated glucose disposal, skeletal muscle glucose uptake, fatty acid oxidation, GLUT4 translocation, AMPK, L6 myotubes, hyperinsulinemic-euglycemic clamp, insulin resistance
MeSH terms
Suppressor of Cytokine Signaling 3 Protein, Adult, Aminoimidazole Carboxamide, Animals, Cell Line, Cell Membrane, Fatty Acids, Glucose, Humans, Hyperinsulinism, Insulin, Male, Multienzyme Complexes, Recombinant Proteins, Ribonucleotides, Glucose Clamp Technique, Signal Transduction, Interleukin-6, Protein Serine-Threonine Kinases, Mice, Knockout, Myoblasts, 3T3-L1 Cells, STAT3 Transcription Factor, Suppressor of Cytokine Signaling Proteins, Glucose Transporter Type 4, Mice, Rats, AMP-Activated Protein Kinases

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