Cited by 44Regulation of Appetite and ObesityAdipokines, Inflammation, and Metabolic DiseasesPancreatic function and diabetes

Leptin Signaling in the Arcuate Nucleus Reduces Insulin’s Capacity to Suppress Hepatic Glucose Production in Obese Mice

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Balland, Eglantine, Chen, Weiyi, Dodd, Garron T., Conductier, Gregory, Coppari, Roberto, Tiganis, Tony, Cowley, Michael A.·2019·Cell Reports

Abstract

Insulin action in the hypothalamus results in the suppression of hepatic glucose production (HGP). Obesity is often associated with a diminished response to insulin, leading to impaired suppression of HGP in obese mice. Here, we demonstrate that blocking central leptin signaling in diet-induced obese (DIO) mice restores the liver's ability to suppress glucose production. Leptin increases the expression of the insulin receptor phosphatase PTP1B, which is highly expressed in the hypothalamus of DIO mice. We demonstrate that the central pharmacological inhibition or ARH-targeted deletion of PTP1B restores the suppression of HGP in obese mice. Additionally, mice that lack PTP1B in AgRP neurons exhibit enhanced ARH insulin signaling and have improved glucose tolerance and insulin sensitivity. Overall, our findings indicate that obesity-induced increases in PTP1B diminish insulin action in the hypothalamus, resulting in unconstrained HGP and contributing to hyperglycemia in obesity.

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  • In obesity conditions, pathological leptin signaling contributes to sustained hepatic glucose production due to abnormal activation of ARC neurons.

    “In obesity conditions, pathological leptin signaling also contributes to sustained hepatic glucose production, due to abnormal activation of ARC neurons 128.”

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Authors
Balland, E., Chen, W., Dodd, G. T., Conductier, G., Coppari, R., Tiganis, T., & Cowley, M. A.
Affiliations
  • Monash University (AU)
  • University of Geneva (CH)
Corresponding author
  • Tiganis, Tony
  • Cowley, Michael A.
Venue
Cell Reports
Publisher
Elsevier BV
Published
2019-01
Volume
26
Issue
2
Pages
346-355.e3
ISSN
2211-1247 (ISSN-L)
OpenAlex
W2908997056
Cited by
44
References
54
Citations by year
2026: 2 · 2025: 4 · 2024: 5 · 2023: 5 · 2022: 5 · 2021: 5 · 2020: 9 · 2019: 9
FWCI
3.87
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Archive ouverte UNIGE (University of Geneva) (publishedVersion, other-oa)
  • Monash University Research Portal (Monash University) (submittedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by-nc-nd)
Funders
  • Fondation pour la Recherche Medicale (FRM SPE20140129012)
  • Diabetes Australia (DART Grant 2016)
  • NHMRC (1079422, 1103037, 1100240, 1065641, 1103193)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
Keywords
leptin signaling, arcuate nucleus, hepatic glucose production, insulin resistance, PTP1B, diet-induced obesity, AgRP neurons, hypothalamus, glucose tolerance, hyperglycemia, insulin sensitivity
MeSH terms
Animals, Arcuate Nucleus of Hypothalamus, Gluconeogenesis, Insulin, Liver, Male, Mice, Inbred C57BL, Obesity, Signal Transduction, Leptin, Mice, Protein Tyrosine Phosphatase, Non-Receptor Type 1, Diet, High-Fat

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