Cited by 79Adipokines, Inflammation, and Metabolic DiseasesAdipose Tissue and MetabolismMuscle Physiology and Disorders

Induction of adiponectin in skeletal muscle of type 2 diabetic mice: In vivo and in vitro studies

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Delaigle, A. M., Senou, M., Guiot, Y., Many, M. -C., Brichard, S. M.·2006·Diabetologia

Abstract

Aims/hypothesis Adiponectin is an adipokine that exhibits insulin-sensitising, fat-burning and anti-inflammatory properties as well as modulatory effects on oxidative stress. We examined whether adiponectin could be induced in a non-adipose tissue, skeletal muscle, in response to metabolic or oxidative aggression both in vivo (in a murine model of type 2 diabetes) and in vitro.Methods Obese and diabetic ob/ob mice were used and compared with lean littermates. Some obese mice were treated with the antioxidant probucol for 3 weeks. At the end of the experiment, blood was sampled and tibialis anterior muscles were collected for mRNA measurement and immunohistochemistry. Additional in vitro experiments were performed on C2C12 myotubes cultured for up to 48 h.Results In spite of hypoadiponectinaemia, Adipoq mRNA levels were markedly increased in the skeletal muscle of ob/ob mice and correlated with systemic oxidative stress. Adipoq upregulation was shown in laser-microdissected myocytes of obese mice. Concomitantly, immunoreactivity for adiponectin was enhanced in obese muscle fibres together with lipid infiltration and local markers of oxidative stress. In cultured C2C12 myotubes, a triglyceride mix and reactive oxygen species producers (H2O2 or a lipoperoxidation end-product) upregulated Adipoq expression and adiponectin production. This effect was reversed by an antioxidant. Finally, treatment of obese mice with probucol also attenuated upregulation in muscle.Conclusions/interpretation The paradoxical upregulation of adiponectin in muscle of obese and diabetic mice may result from lipotoxicity and related oxidative stress. This unexpected finding could be viewed as a local protection to counteract ectopic fat deposition and oxidative damage.

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Authors
Delaigle, A. M., Senou, M., Guiot, Y., Many, M. C., & Brichard, S. M.
Affiliations
UCLouvain (BE)
Corresponding author
Brichard, S. M.
Venue
Diabetologia
Published
2006-03-29
Volume
49
Issue
6
Pages
1311-1323
ISSN
  • 0012-186X (ISSN-L)
  • 1432-0428
OpenAlex
W2080905500
Cited by
79
References
45
Citations by year
2024: 1 · 2023: 3 · 2022: 4 · 2021: 4 · 2020: 2 · 2019: 3 · 2018: 5 · 2017: 2 · 2016: 3 · 2015: 6 · 2014: 3 · 2013: 10 · 2012: 4
FWCI
4.90
Type
journal article
Language
en
Open access
Locations
  • Diabetologia (publishedVersion)
  • PubMed (publishedVersion)
  • DIAL (Catholic University of Leuven) (submittedVersion)
Funders
Fonds De La Recherche Scientifique - FNRS (ARC 05/10-328)
Topics
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
Keywords
adiponectin, skeletal muscle, type 2 diabetes, oxidative stress, lipotoxicity, probucol, ob/ob mice, C2C12 myotubes, reactive oxygen species, lipid peroxidation, ectopic fat deposition, insulin resistance, adipokines
MeSH terms
Animals, Antioxidants, Body Weight, Cells, Cultured, Diabetes Mellitus, Type 2, Female, Gene Expression Regulation, Lipids, Mice, Inbred C57BL, Mice, Obese, Obesity, Probucol, RNA, Polymerase Chain Reaction, DNA Primers, Oxidative Stress, Muscle, Skeletal, Mice, Adiponectin

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