Cited by 52Metabolism, Diabetes, and CancerAdipose Tissue and MetabolismMitochondrial Function and Pathology

Uncoupling protein 3 expression levels influence insulin sensitivity, fatty acid oxidation, and related signaling pathways

Senese, Rosalba, Valli, Vivien, Moreno, Maria, Lombardi, Assunta, Busiello, Rosa Anna, Cioffi, Federica, Silvestri, Elena, Goglia, Fernando +2 more·2011·Pflügers Archiv - European Journal of Physiology

Abstract

Controversy exists on whether uncoupling protein 3 (UCP3) positively or negatively influences insulin sensitivity in vivo, and the underlying signaling pathways have been scarcely studied. We studied how a progressive reduction in UCP3 expression (using UCP3 +/+, UCP3 +/-, and UCP3 -/- mice) modulates insulin sensitivity and related metabolic parameters. In order to further validate our observations, we also studied animals in which insulin resistance was induced by administration of a high-fat diet (HFD). In UCP3 +/- and UCP3 -/- mice, gastrocnemius muscle Akt/protein kinase B (Akt/PKB) (serine 473) and AMP-activated protein kinase (AMPK) (threonine 171) phosphorylation, and glucose transporter 4 (GLUT4) membrane levels were reduced compared to UCP3 +/+ mice. The HOMA-IR index (insulin resistance parameter) was increased both in the UCP3 +/- and UCP3 -/- mice. In these mice, insulin administration normalized Akt/PKB phosphorylation between genotypes while AMPK phosphorylation was further reduced, and sarcolemmal GLUT4 levels were induced but did not reach control levels. Furthermore, non-insulin-stimulated muscle fatty acid oxidation and the expression of several involved genes both in muscle and in liver were reduced. HFD administration induced insulin resistance in UCP3 +/+ mice and the aforementioned parameters resulted similar to those of chow-fed UCP3 +/- and UCP3 -/- mice. In conclusion, high-fat-diet-induced insulin resistance in wild-type mice mimics that of chow-fed UCP3 +/- and UCP3 -/- mice showing that progressive reduction of UCP3 levels results in insulin resistance. This is accompanied by decreased fatty acid oxidation and a less intense Akt/PKB and AMPK signaling.

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Crossref · 10.1007/s00424-010-0892-3

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Authors
Senese, R., Valli, V., Moreno, M., Lombardi, A., Busiello, R. A., Cioffi, F., Silvestri, E., Goglia, F., Lanni, A., & de Lange, P.
Affiliations
  • University of Campania "Luigi Vanvitelli" (IT)
  • University of Naples Federico II (IT)
  • University of Sannio (IT)
Corresponding author
Lanni, Antonia
Venue
Pflügers Archiv - European Journal of Physiology
Published
2010-11-07
Volume
461
Issue
1
Pages
153-164
ISSN
  • 0031-6768 (ISSN-L)
  • 1432-2013
OpenAlex
W2136747158
Cited by
52
References
40
Citations by year
2025: 1 · 2024: 4 · 2022: 3 · 2021: 4 · 2020: 5 · 2019: 2 · 2018: 5 · 2017: 2 · 2016: 6 · 2015: 3 · 2014: 5 · 2013: 5 · 2012: 4
FWCI
1.56
Type
journal article
Language
en
Open access
closed
Locations
  • Pflügers Archiv - European Journal of Physiology (publishedVersion)
  • PubMed (publishedVersion)
  • Archivio Istituzionale della Ricerca - Università degli Studi della Campania "Luigi Vanvitelli" (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
Keywords
UCP3, insulin sensitivity, insulin resistance, fatty acid oxidation, AMPK, GLUT4 translocation, skeletal muscle, high-fat diet, HOMA-IR, liver
MeSH terms
Uncoupling Protein 3, Animals, Dietary Fats, Fatty Acids, Insulin Resistance, Ion Channels, Male, Mitochondria, Muscle, Oxidation-Reduction, Phosphorylation, Signal Transduction, Muscle, Skeletal, Mitochondrial Proteins, Proto-Oncogene Proteins c-akt, Glucose Transporter Type 4, Mice, AMP-Activated Protein Kinases

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