Cited by 153Adipose Tissue and MetabolismMetabolism, Diabetes, and CancerMitochondrial Function and Pathology

High-fat diet, muscular lipotoxicity and insulin resistance

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Schrauwen, Patrick·2007·Proceedings of the Nutrition Society

Abstract

A high dietary fat intake and low physical activity characterize the current Western lifestyle. Dietary fatty acids do not stimulate their own oxidation and a surplus of fat is stored in white adipose tissue, liver, heart and muscle. In these organs intracellular lipids serve as a rapidly-available energy source during, for example, physical activity. However, under conditions of elevated plasma fatty acid levels and high dietary fat intake, conditions implicated in the development of modern diseases such as obesity and type 2 diabetes mellitus, fat accumulation in liver and muscle (intramyocellular lipids; IMCL) is associated with the development of insulin resistance. Recent data suggest that IMCL are specifically harmful when combined with reduced mitochondrial function, both conditions that characterize type 2 diabetes. In the (pre)diabetic state reduced expression of the transcription factor PPARγ co-activator-1α (PGC-1α), which is involved in mitochondrial biogenesis, has been suggested to underlie the reduced mitochondrial function. Importantly, the reduction in PGC-1α may be a result of low physical activity, consumption of high-fat diets and high plasma fatty acid levels. Mitochondrial function can also be impaired as a result of enhanced mitochondrial damage by reactive oxygen species. Fatty acids in the vicinity of mitochondria are particularly prone to lipid peroxidation. In turn, lipid peroxides can induce oxidative damage to mitochondrial RNA, DNA and proteins. The mitochondrial protein uncoupling protein 3, which is induced under high-fat conditions, may serve to protect mitochondria against lipid-induced oxidative damage, but is reduced in the prediabetic state. Thus, muscular lipotoxicity may impair mitochondrial function and may be central to insulin resistance and type 2 diabetes mellitus.

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Authors
Schrauwen, P.
Affiliations
Maastricht University (NL)
Corresponding author
Schrauwen, Patrick
Venue
Proceedings of the Nutrition Society
Published
2007-02
Volume
66
Issue
1
Pages
33-41
ISSN
  • 0029-6651 (ISSN-L)
  • 1475-2719
OpenAlex
W2143488518
Cited by
153
References
65
Citations by year
2026: 1 · 2025: 10 · 2024: 8 · 2023: 6 · 2022: 3 · 2021: 7 · 2020: 6 · 2019: 7 · 2018: 6 · 2017: 7 · 2016: 5 · 2015: 7 · 2014: 5 · 2013: 6 · 2012: 12
FWCI
9.09
Type
journal article
Language
en
Open access
Locations
  • Proceedings of The Nutrition Society (publishedVersion)
  • PubMed (publishedVersion)
  • Research Publications (Maastricht University) (submittedVersion, other-oa)
Funders
Koninklijke Nederlandse Akademie van Wetenschappen
Topics
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
Keywords
high-fat diet, insulin resistance, intramyocellular lipid, type 2 diabetes, mitochondrial function, PGC-1α, mitochondrial biogenesis, lipid peroxidation, reactive oxygen species, UCP3, physical inactivity, obesity, plasma fatty acids
MeSH terms
Adipose Tissue, Diabetes Mellitus, Type 2, Dietary Fats, Humans, Insulin Resistance, Mitochondria, Muscle, Exercise, Muscle, Skeletal, Lipid Metabolism

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