Cited by 180Metabolism, Diabetes, and CancerAdipose Tissue and MetabolismDiabetes, Cardiovascular Risks, and Lipoproteins

Intramuscular lipid metabolism, insulin action, and obesity

Open access
Consitt, Leslie A., Bell, Jill A., Houmard, Joseph A.·2009·IUBMB Life

Abstract

With the increasing prevalence of obesity, research has focused on the molecular mechanism(s) linking obesity and skeletal muscle insulin resistance. Metabolic alterations within muscle, such as changes in the cellular location of fatty acid transporter proteins, decreased mitochondrial enzyme activity, and defects in mitochondrial morphology, likely contribute to obesity and insulin resistance. These defects are thought to play a role in the reduced skeletal muscle fatty acid oxidation and increased intramuscular lipid (IMCL) accumulation that is apparent with obesity and other insulin‐resistant states such as type 2 diabetes. Intramuscular triacylglycerol does not appear to be a ubiquitous marker of insulin resistance, although specific IMCL intermediates such as long‐chain fatty acyl‐CoAs, ceramide, and diacylglycerol may inhibit insulin signal transduction. In this review, we will briefly summarize the defects in skeletal muscle lipid metabolism associated with obesity, and discuss the proposed mechanisms by which these defects may contribute to insulin resistance. © 2008 IUBMB IUBMB Life, 61(1): 47–55, 2009

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  • Pathological myosteatosis in aging and obesity is associated with decreased insulin sensitivity and muscle mass and strength loss.

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    From The critical role of oxidative stress in sarcopenic obesity (2021) · cites this paper as [35]

  • Decreased insulin secretion by the pancreas is derived from elevated concentrations of fatty acids, which induce β-cell apoptosis and reduce proliferation of pancreatic cells.

    “Together with these events, the decreased insulin secretion by the pancreas is derived from elevated concentrations of fatty acids, which induces β-cell apoptosis and reduces proliferation of pancreatic cells [14, 16, 34–36].”

    From The critical role of oxidative stress in sarcopenic obesity (2021) · cites this paper as [35]

  • The mechanism of myosteatosis-induced insulin resistance involves impaired insulin signaling by lipidic intermediates such as diacylglycerol, long-chain acyl-coenzyme A, and ceramide, which inhibit GLUT-4 translocation to the sarcolemma.

    “The mechanism involves the impaired insulin signaling by interacting with lipidic intermediates such as diacylglycerol (DAG), long-chain acyl-coenzyme A, and ceramide. These interactions at various levels inhibit the GLUT-4 translocation to the sarcolemma.”

    From The critical role of oxidative stress in sarcopenic obesity (2021) · cites this paper as [35]

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  1. [26]Nickerson J Bonen A Defining a role for skeletal muscle fatty acid transport proteins 2nd Northern Lights Conference. Canadian Federation of Biological Societies Guelph, Ontario, Canada F47 2005

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Authors
Consitt, L. A., Bell, J. A., & Houmard, J. A.
Affiliations
East Carolina University (US)
Corresponding author
Consitt, Leslie A.
Venue
IUBMB Life
Publisher
Wiley
Published
2008-10-06
Volume
61
Issue
1
Pages
47-55
ISSN
  • 1521-6543 (ISSN-L)
  • 1521-6551
OpenAlex
W2095780917
Cited by
180
References
100
Citations by year
2026: 6 · 2025: 6 · 2024: 10 · 2023: 5 · 2022: 11 · 2021: 10 · 2020: 9 · 2019: 9 · 2018: 9 · 2017: 13 · 2016: 9 · 2015: 10 · 2014: 16 · 2013: 10 · 2012: 17
FWCI
0.77
Type
journal article
Language
en
Open access
Locations
  • IUBMB Life (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • The Scholarship East Carolina University's Institutional Repository (East Carolina University) (submittedVersion)
Funders
  • National Institute on Aging (AG025205, R01AG025205)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-56112, R01DK056112)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
obesity, skeletal muscle insulin resistance, fatty acid transporters, mitochondrial dysfunction, fatty acid oxidation, ceramide, diacylglycerol, long-chain fatty acyl-CoA, insulin signaling, type 2 diabetes
MeSH terms
Humans, Insulin, Insulin Resistance, Mitochondria, Models, Biological, Obesity, Signal Transduction, Muscle, Skeletal, Lipid Metabolism

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