Cited by 573Mitochondrial Function and PathologyAdipose Tissue and MetabolismMuscle Physiology and Disorders

Mitochondrial respiration is decreased in skeletal muscle of patients with type 2 diabetes

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Mogensen, Martin, Sahlin, Kent, Fernström, Maria, Glintborg, Dorte, Vind, Birgitte F., Beck-Nielsen, Henning, Højlund, Kurt·2007·Diabetes

Abstract

We tested the hypothesis of a lower respiratory capacity per mitochondrion in skeletal muscle of type 2 diabetic patients compared with obese subjects. Muscle biopsies obtained from 10 obese type 2 diabetic and 8 obese nondiabetic male subjects were used for assessment of 3-hydroxy-Acyl-CoA-dehydrogenase (HAD) and citrate synthase activity, uncoupling protein (UCP)3 content, oxidative stress measured as 4-hydroxy-2-nonenal (HNE), fiber type distribution, and respiration in isolated mitochondria. Respiration was normalized to citrate synthase activity (mitochondrial content) in isolated mitochondria. Maximal ADP-stimulated respiration (state 3) with pyruvate plus malate and respiration through the electron transport chain (ETC) were reduced in type 2 diabetic patients, and the proportion of type 2X fibers were higher in type 2 diabetic patients compared with obese subjects (all P < 0.05). There were no differences in respiration with palmitoyl-l-carnitine plus malate, citrate synthase activity, HAD activity, UCP3 content, or oxidative stress measured as HNE between the groups. In the whole group, state 3 respiration with pyruvate plus malate and respiration through ETC were negatively associated with A1C, and the proportion of type 2X fibers correlated with markers of insulin resistance (P < 0.05). In conclusion, we provide evidence for a functional impairment in mitochondrial respiration and increased amount of type 2X fibers in muscle of type 2 diabetic patients. These alterations may contribute to the development of type 2 diabetes in humans with obesity.

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Authors
Mogensen, M., Sahlin, K., Fernström, M., Glintborg, D., Vind, B. F., Beck-Nielsen, H., & Højlund, K.
Affiliations
  • University of Southern Denmark (DK)
  • Stockholm University College of Physical Education and Sports, GIH, Stockholm, Sweden
  • Odense University Hospital (DK)
  • Department of Endocrinology, Diabetes Research Centre, Odense University Hospital, Odense, Denmark
Venue
Diabetes
Published
2007-06-01
Volume
56
Issue
6
Pages
1592-1599
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2093366966
Cited by
573
References
52
Citations by year
2026: 11 · 2025: 14 · 2024: 29 · 2023: 36 · 2022: 38 · 2021: 28 · 2020: 33 · 2019: 28 · 2018: 28 · 2017: 21 · 2016: 24 · 2015: 22 · 2014: 25 · 2013: 38 · 2012: 44
FWCI
15.25
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
  • University of Southern Denmark Research Portal (University of Southern Denmark) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
Keywords
type 2 diabetes, skeletal muscle, mitochondrial respiration, electron transport chain, fiber type distribution, insulin resistance, obesity, oxidative stress, UCP3, citrate synthase, 3-hydroxyacyl-CoA dehydrogenase, HbA1c
MeSH terms
Biopsy, Blood Glucose, Citrate (si)-Synthase, Diabetes Mellitus, Type 2, Electron Transport, Humans, Male, Middle Aged, Mitochondria, Muscle, Obesity, Oxygen Consumption, Reference Values, 3-Hydroxyacyl CoA Dehydrogenases, Muscle, Skeletal

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