Cited by 695Regulation of Appetite and ObesityPancreatic function and diabetesHypothalamic control of reproductive hormones

Insulin Action in AgRP-Expressing Neurons Is Required for Suppression of Hepatic Glucose Production

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Könner, A. Christine, Janoschek, Ruth, Plum, Leona, Jordan, Sabine D., Rother, Eva, Ma, Xiaosong, Xu, Chun, Enriori, Pablo +6 more·2007·Cell Metabolism

Abstract

Insulin action in the central nervous system regulates energy homeostasis and glucose metabolism. To define the insulin-responsive neurons that mediate these effects, we generated mice with selective inactivation of the insulin receptor (IR) in either pro-opiomelanocortin (POMC)- or agouti-related peptide (AgRP)-expressing neurons of the arcuate nucleus of the hypothalamus. While neither POMC- nor AgRP-restricted IR knockout mice exhibited altered energy homeostasis, insulin failed to normally suppress hepatic glucose production during euglycemic-hyperinsulinemic clamps in AgRP-IR knockout (IR(DeltaAgRP)) mice. These mice also exhibited reduced insulin-stimulated hepatic interleukin-6 expression and increased hepatic expression of glucose-6-phosphatase. These results directly demonstrate that insulin action in POMC and AgRP cells is not required for steady-state regulation of food intake and body weight. However, insulin action specifically in AgRP-expressing neurons does play a critical role in controlling hepatic glucose production and may provide a target for the treatment of insulin resistance in type 2 diabetes.

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Crossref · 10.1016/j.cmet.2007.05.004

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  • Insulin hyperpolarizes and silences both AgRP and POMC neurons and activates PI3K signaling in both.

    “insulin hyperpolarizes and silences both AgRP and POMC neurons (96) and activates PI3K signaling in both these neuronal populations (204).”
  • Insulin action in AgRP-expressing cells is required for the maintenance of normal liver insulin sensitivity.

    “implying a role for insulin action in AgRP expressing cells in the maintenance of normal liver insulin sensitivity (96).”

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Authors
Könner, A. C., Janoschek, R., Plum, L., Jordan, S. D., Rother, E., Ma, X., Xu, C., Enriori, P., Hampel, B., Barsh, G. S., Kahn, C. R., Cowley, M. A., Ashcroft, F. M., & Brüning, J. C.
Affiliations
  • University of Cologne (DE)
  • University of Oxford (GB)
  • Oregon National Primate Research Center (US)
  • Stanford Medicine (US)
  • Joslin Diabetes Center (US)
Corresponding author
Brüning, Jens C.
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2007-06
Volume
5
Issue
6
Pages
438-449
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2072556905
Cited by
695
References
34
Citations by year
2026: 17 · 2025: 22 · 2024: 38 · 2023: 31 · 2022: 21 · 2021: 58 · 2020: 42 · 2019: 37 · 2018: 44 · 2017: 52 · 2016: 45 · 2015: 38 · 2014: 46 · 2013: 36 · 2012: 33
FWCI
13.34
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-6-2202)
  • National Center for Research Resources (RR-0163)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
insulin action, insulin receptor, agouti-related protein, proopiomelanocortin, arcuate nucleus, hypothalamic neurons, hepatic glucose production, energy homeostasis, dietary intake, body weight, interleukin-6, glucose-6-phosphatase, insulin resistance, type 2 diabetes, hyperinsulinemic-euglycemic clamp
MeSH terms
Animals, Body Weight, Electrophysiology, Female, Glucose, Glucose Tolerance Test, Glucose-6-Phosphatase, Homeostasis, Hyperinsulinism, Hypothalamus, Immunoenzyme Techniques, Insulin, Liver, Male, Mice, Inbred C57BL, Neurons, Pro-Opiomelanocortin, Receptor, Insulin, Blotting, Western, Interleukin-6, Phosphatidylinositol Phosphates, Mice, Knockout, Integrases, Phosphatidylinositol 3-Kinases, Mice, Agouti-Related Protein

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