Cited by 202Mitochondrial Function and PathologyMetabolism, Diabetes, and CancerAdipose Tissue and Metabolism

Disruption of mitochondria-associated endoplasmic reticulum membrane (MAM) integrity contributes to muscle insulin resistance in mice and humans

Tubbs, Emily, Chanon, Stéphanie, Robert, Maud, Bendridi, Nadia, Bidaux, Gabriel, Chauvin, Marie-Agnès, Ji-Cao, Jingwei, Durand, Christine +4 more·2018·Diabetes

Abstract

Modifications of the interactions between endoplasmic reticulum (ER) and mitochondria, defined as mitochondria-associated membranes (MAMs), were recently shown to be involved in the control of hepatic insulin action and glucose homeostasis, but with conflicting results. Whereas skeletal muscle is the primary site of insulin-mediated glucose uptake and the main target for alterations in insulin-resistant states, the relevance of MAM integrity in muscle insulin resistance is unknown. Deciphering the importance of MAMs on muscle insulin signaling could help to clarify this controversy. Here, we show in skeletal muscle of different mice models of obesity and type 2 diabetes (T2D) a marked disruption of ER-mitochondria interactions as an early event preceding mitochondrial dysfunction and insulin resistance. Furthermore, in human myotubes, palmitate-induced insulin resistance is associated with a reduction of structural and functional ER-mitochondria interactions. Importantly, experimental increase of ER-mitochondria contacts in human myotubes prevents palmitate-induced alterations of insulin signaling and action, whereas disruption of MAM integrity alters the action of the hormone. Lastly, we found an association between altered insulin signaling and ER-mitochondria interactions in human myotubes from obese subjects with or without T2D compared with healthy lean subjects. Collectively, our data reveal a new role of MAM integrity in insulin action of skeletal muscle and highlight MAM disruption as an essential subcellular alteration associated with muscle insulin resistance in mice and humans. Therefore, reduced ER-mitochondria coupling could be a common alteration of several insulin-sensitive tissues playing a key role in altered glucose homeostasis in the context of obesity and T2D.

Integrity signals

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Crossref · 10.2337/db17-0316

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Authors
Tubbs, E., Chanon, S., Robert, M., Bendridi, N., Bidaux, G., Chauvin, M.-A., Ji-Cao, J., Durand, C., Gauvrit-Ramette, D., Vidal, H., Lefai, E., & Rieusset, J.
Affiliations
  • Lyon 1 Université (FR)
  • Laboratoire de Recherche en Cardiovasculaire, Métabolisme, Diabétologie et Nutrition (CarMeN), INSERM U1060, INRA U1397, Institut National des Sciences Appliquées-Lyon, Université Claude Bernard Lyon1, Oullins, Lyon, France
Corresponding author
Rieusset, Jennifer
Venue
Diabetes
Published
2018-01-11
Volume
67
Issue
4
Pages
636-650
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2783880365
Cited by
202
References
46
Citations by year
2026: 19 · 2025: 17 · 2024: 26 · 2023: 19 · 2022: 22 · 2021: 35 · 2020: 32 · 2019: 23 · 2018: 9
FWCI
8.80
Type
journal article
Language
en
Open access
closed
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
  • INSERM
  • Agence Nationale de la Recherche (ANR-09-JCJC-0116)
  • Fondation pour la Recherche Médicale (DRM20101220461)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
Keywords
mitochondria-associated endoplasmic reticulum membranes, ER-mitochondria communication, muscle insulin resistance, skeletal muscle, type 2 diabetes, obesity, palmitate, insulin signaling, mitochondrial dysfunction, glucose homeostasis, myotubes
MeSH terms
Aged, Animals, Diabetes Mellitus, Type 2, Disease Models, Animal, Endoplasmic Reticulum, Female, Glucose, Homeostasis, Humans, Insulin, Insulin Resistance, Intracellular Membranes, Male, Middle Aged, Mitochondria, Muscle, Obesity, Palmitates, Signal Transduction, Muscle, Skeletal, Muscle Fibers, Skeletal, Mice

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