Cited by 111Protein Tyrosine PhosphatasesMetabolism, Diabetes, and CancerLiver Disease Diagnosis and Treatment

Hepatic Oxidative Stress Promotes Insulin-STAT-5 Signaling and Obesity by Inactivating Protein Tyrosine Phosphatase N2

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Gurzov, Esteban N., Tran, Melanie, Fernandez-Rojo, Manuel A., Merry, Troy L., Zhang, Xinmei, Xu, Yang, Fukushima, Atsushi, Waters, Michael J. +4 more·2014·Cell Metabolism

Abstract

Hepatic insulin resistance is a key contributor to the pathogenesis of obesity and type 2 diabetes (T2D). Paradoxically, the development of insulin resistance in the liver is not universal, but pathway selective, such that insulin fails to suppress gluconeogenesis but promotes lipogenesis, contributing to the hyperglycemia, steatosis, and hypertriglyceridemia that underpin the deteriorating glucose control and microvascular complications in T2D. The molecular basis for the pathway-specific insulin resistance remains unknown. Here we report that oxidative stress accompanying obesity inactivates protein-tyrosine phosphatases (PTPs) in the liver to activate select signaling pathways that exacerbate disease progression. In obese mice, hepatic PTPN2 (TCPTP) inactivation promoted lipogenesis and steatosis and insulin-STAT-5 signaling. The enhanced STAT-5 signaling increased hepatic IGF-1 production, which suppressed central growth hormone release and exacerbated the development of obesity and T2D. Our studies define a mechanism for the development of selective insulin resistance with wide-ranging implications for diseases characterized by oxidative stress.

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Authors
Gurzov, E. N., Tran, M., Fernandez-Rojo, M. A., Merry, T. L., Zhang, X., Xu, Y., Fukushima, A., Waters, M. J., Watt, M. J., Andrikopoulos, S., Neel, B. G., & Tiganis, T.
Affiliations
  • Monash University (AU)
  • University Health Network (CA)
  • The University of Queensland (AU)
  • The University of Melbourne (AU)
Corresponding author
Tiganis, Tony
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2014-07
Volume
20
Issue
1
Pages
85-102
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2025897821
Cited by
111
References
74
Citations by year
2026: 4 · 2025: 11 · 2024: 13 · 2023: 20 · 2022: 7 · 2021: 10 · 2020: 6 · 2019: 11 · 2018: 5 · 2017: 10 · 2016: 5 · 2015: 6 · 2014: 3
FWCI
3.28
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Dépôt institutionnel de l'Université libre de Bruxelles (Université Libre de Bruxelles) (submittedVersion)
  • RMIT Research Repository (RMIT University Library) (submittedVersion)
  • Figshare (submittedVersion)
Funders
  • Japan Society for the Promotion of Science (26860162)
  • National Cancer Institute (R37CA49152, R37CA049152, R01CA049152, P30CA016087)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
Keywords
hepatic oxidative stress, insulin resistance, STAT5 signaling, PTPN2, TCPTP, obesity, type 2 diabetes, lipogenesis, hepatic steatosis, gluconeogenesis, insulin-like growth factor I, growth hormone
MeSH terms
Glutathione Peroxidase GPX1, Animals, Cells, Cultured, Female, Glutathione Peroxidase, Insulin, Insulin-Like Growth Factor I, Liver, Male, Mice, Inbred C57BL, Obesity, Growth Hormone, Signal Transduction, Reactive Oxygen Species, Mice, Knockout, Oxidative Stress, Hepatocytes, STAT1 Transcription Factor, STAT3 Transcription Factor, STAT5 Transcription Factor, Mice, Protein Tyrosine Phosphatase, Non-Receptor Type 2, Diet, High-Fat

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