Cited by 45Sphingolipid Metabolism and SignalingLipid metabolism and biosynthesisDiet, Metabolism, and Disease

Intramyocellular ceramides: subcellular concentrations and fractional de novo synthesis in postabsorptive humans

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Chung, Jin Ook, Koutsari, Christina, Blachnio-Zabielska, Agnieszka U., Hames, Kazanna C., Jensen, Michael D.·2017·Diabetes

Abstract

We investigated the relationship between insulin resistance markers and subsarcolemmal (SS) and intramyofibrillar (IMF) ceramide concentrations, as well as the contribution of plasma palmitate (6.5-h infusion of [U-13C]palmitate) to intramyocellular ceramides. Seventy-six postabsorptive men and women had muscle biopsies 1.5, 6.5, and 24 h after starting the tracer infusion. Concentrations and enrichment of muscle ceramides were measured by liquid chromatography-tandem mass spectrometry. We found that HOMA of insulin resistance, plasma insulin, and triglyceride concentrations were positively correlated with SS C16:0 and C18:1 ceramide, but not SS C14:0-Cer, C20:0-Cer, C24:0-Cer, and C24:1-Cer concentrations; IMF ceramide concentrations were not correlated with any metabolic parameters. The fractional contribution of plasma palmitate to 16:0 ceramide was greater in SS than IMF (SS, 18.2% vs. IMF, 8.7%; P = 0.0006). Plasma insulin concentrations correlated positively with the fractional contribution of plasma palmitate to SS 16:0 ceramide. The fractional contribution of plasma palmitate to intramyocellular SS 16:0 ceramide was positively correlated with SS C16:0 ceramide concentrations (γ = 0.435; P = 0.002). We conclude that skeletal muscle SS ceramides, especially C16 to C18 chain lengths and the de novo synthesis of intramyocellular ceramide from plasma palmitate are associated with markers of insulin resistance.

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  • Different approaches for the measurement of ceramide synthesis in vivo have been proposed, e.g. infusion of U13C palmitate as ceramide precursors in humans to measure de novo synthesis in skeletal muscle or labelled palmitate to measure hepatic ceramide kinetics in rat models.

    “Different approaches for the measurement of ceramide synthesis in vivo have been proposed, e.g. the infusion of U13C palmitate as ceramide precursors, used in humans to measure de novo synthesis of ceramides in skeletal muscle[119], [120], [121] or labelled palmitate used to measure hepatic ceramide kinetics in rat models.122,123”

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Authors
Chung, J. O., Koutsari, C., Blachnio-Zabielska, A. U., Hames, K. C., & Jensen, M. D.
Affiliations
  • Chonnam National University (KR)
  • Mayo Clinic (US)
  • Department of Hygiene, Epidemiology and Metabolic Disorders, Medical University of Białystok, Białystok, Poland
Corresponding author
Jensen, Michael D.
Venue
Diabetes
Published
2017-05-08
Volume
66
Issue
8
Pages
2082-2091
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2613259577
Cited by
45
References
37
Citations by year
2026: 2 · 2025: 5 · 2024: 6 · 2023: 2 · 2022: 4 · 2021: 2 · 2020: 8 · 2019: 3 · 2018: 10 · 2017: 3
FWCI
2.68
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
U.S. Public Health Service (DK-40484, DK-45343, DK-50456, R-00585)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Sphingolipid Metabolism and Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diet, Metabolism, and Disease
Keywords
insulin resistance, de novo ceramide synthesis, skeletal muscle, HOMA-IR, postabsorptive state
MeSH terms
Adult, Biopsy, Ceramides, Chromatography, Liquid, Fasting, Fatty Acids, Nonesterified, Female, Humans, Insulin, Insulin Resistance, Male, Myofibrils, Palmitates, Sarcolemma, Time Factors, Triglycerides, Muscle, Skeletal, Muscle Cells, Tandem Mass Spectrometry, Healthy Volunteers

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