Cited by 86Metabolism, Diabetes, and CancerRegulation of Appetite and ObesityPancreatic function and diabetes

Hypothalamic AMP-Activated Protein Kinase Regulates Glucose Production

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Yang, Clair S., Lam, Carol K.L., Chari, Madhu, Cheung, Grace W.C., Kokorovic, Andrea, Gao, Sun, Leclerc, Isabelle, Rutter, Guy A. +1 more·2010·Diabetes

Abstract

OBJECTIVE: The fuel sensor AMP-activated protein kinase (AMPK) in the hypothalamus regulates energy homeostasis by sensing nutritional and hormonal signals. However, the role of hypothalamic AMPK in glucose production regulation remains to be elucidated. We hypothesize that bidirectional changes in hypothalamic AMPK activity alter glucose production. RESEARCH DESIGN AND METHODS: To introduce bidirectional changes in hypothalamic AMPK activity in vivo, we first knocked down hypothalamic AMPK activity in male Sprague-Dawley rats by either injecting an adenovirus expressing the dominant-negative form of AMPK (Ad-DN AMPKα2 [D157A]) or infusing AMPK inhibitor compound C directly into the mediobasal hypothalamus. Next, we independently activated hypothalamic AMPK by delivering either an adenovirus expressing the constitutive active form of AMPK (Ad-CA AMPKα1312 [T172D]) or the AMPK activator AICAR. The pancreatic (basal insulin)-euglycemic clamp technique in combination with the tracer-dilution methodology was used to assess the impact of alternations in hypothalamic AMPK activity on changes in glucose kinetics in vivo. RESULTS: Injection of Ad-DN AMPK into the hypothalamus knocked down hypothalamic AMPK activity and led to a significant suppression of glucose production with no changes in peripheral glucose uptake during the clamps. In parallel, hypothalamic infusion of AMPK inhibitor compound C lowered glucose production as well. Conversely, molecular and pharmacological activation of hypothalamic AMPK negated the ability of hypothalamic nutrients to lower glucose production. CONCLUSIONS: These data indicate that changes in hypothalamic AMPK activity are sufficient and necessary for hypothalamic nutrient-sensing mechanisms to alter glucose production in vivo.

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  • Inhibition of hypothalamic AMPK lowers food intake and hepatic glucose production, while increasing hypothalamic AMPK has the opposite effect.

    “inhibition of hypothalamic AMPK (using an adenovirus expressing the dominant negative form of AMPK) lowers food intake and HGP, while increasing hypothalamic AMPK has the opposite effect (113, 209)”

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Authors
Yang, C. S., Lam, C. K. L., Chari, M., Cheung, G. W. C., Kokorovic, A., Gao, S., Leclerc, I., Rutter, G. A., & Lam, T. K. T.
Affiliations
  • University Health Network (CA)
  • Section of Cell Biology, Division of Diabetes, Endocrinology, and Metabolism, Department of Medicine, Imperial College, South Kensington, London, U.K.;
  • Imperial College London (GB)
Corresponding author
Lam, Tony K.T.
Venue
Diabetes
Published
2010-08-03
Volume
59
Issue
10
Pages
2435-2443
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2110058008
Cited by
86
References
125
Citations by year
2026: 2 · 2025: 2 · 2024: 2 · 2022: 4 · 2021: 4 · 2020: 4 · 2019: 4 · 2018: 6 · 2017: 3 · 2016: 6 · 2015: 6 · 2014: 6 · 2013: 11 · 2012: 10
FWCI
4.69
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Library and Archives Canada (Government of Canada) (submittedVersion)
  • Spiral (Imperial College London) (submittedVersion)
Funders
  • Wellcome Trust (WT082366MA, 081958/Z/07/Z)
  • U.S. Public Health Service (R0I DKO71962-01)
  • Canadian Institutes of Health Research (MOP-86554)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
Keywords
AMPK, hypothalamus, glucose production, glucose kinetics, nutrient sensing, energy homeostasis, compound C, AICAR, insulin, glucose uptake
MeSH terms
Aminoimidazole Carboxamide, Animals, Blood Glucose, Body Weight, Enzyme Inhibitors, Glucagon, Glucose, Glycolysis, Homeostasis, Hypoglycemic Agents, Hypothalamus, Insulin, Male, Ribonucleotides, Rats, Sprague-Dawley, Rats, AMP-Activated Protein Kinases

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