Cited by 95Regulation of Appetite and ObesityAdipose Tissue and MetabolismAdipokines, Inflammation, and Metabolic Diseases

Loss of dorsomedial hypothalamic GLP-1 signaling reduces BAT thermogenesis and increases adiposity

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Lee, Shin J., Sanchez-Watts, Graciela, Krieger, Jean-Philippe, Pignalosa, Angelica, Norell, Puck N., Cortella, Alyssa, Pettersen, Klaus G., Vrdoljak, Dubravka +4 more·2018·Molecular Metabolism

Abstract

OBJECTIVE: Glucagon-like peptide-1 (GLP-1) neurons in the hindbrain densely innervate the dorsomedial hypothalamus (DMH), a nucleus strongly implicated in body weight regulation and the sympathetic control of brown adipose tissue (BAT) thermogenesis. Therefore, DMH GLP-1 receptors (GLP-1R) are well placed to regulate energy balance by controlling sympathetic outflow and BAT function. METHODS: We investigate this possibility in adult male rats by using direct administration of GLP-1 (0.5 ug) into the DMH, knocking down DMH GLP-1R mRNA with viral-mediated RNA interference, and by examining the neurochemical phenotype of GLP-1R expressing cells in the DMH using in situ hybridization. RESULTS: GLP-1 administered into the DMH increased BAT thermogenesis and hepatic triglyceride (TG) mobilization. On the other hand, Glp1r knockdown (KD) in the DMH increased body weight gain and adiposity, with a concomitant reduction in energy expenditure (EE), BAT temperature, and uncoupling protein 1 (UCP1) expression. Moreover, DMH Glp1r KD induced hepatic steatosis, increased plasma TG, and elevated liver specific de-novo lipogenesis, effects that collectively contributed to insulin resistance. Interestingly, DMH Glp1r KD increased neuropeptide Y (NPY) mRNA expression in the DMH. GLP-1R mRNA in the DMH, however, was found in GABAergic not NPY neurons, consistent with a GLP-1R-dependent inhibition of NPY neurons that is mediated by local GABAergic neurons. Finally, DMH Glp1r KD attenuated the anorexigenic effects of the GLP-1R agonist exendin-4, highlighting an important role of DMH GLP-1R signaling in GLP-1-based therapies. CONCLUSIONS: Collectively, our data show that DMH GLP-1R signaling plays a key role for BAT thermogenesis and adiposity.

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Crossref · 10.1016/j.molmet.2018.03.008

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Authors
Lee, S. J., Sanchez-Watts, G., Krieger, J.-P., Pignalosa, A., Norell, P. N., Cortella, A., Pettersen, K. G., Vrdoljak, D., Hayes, M. R., Kanoski, S. E., Langhans, W., & Watts, A. G.
Affiliations
  • ETH Zurich (CH)
  • University of Southern California (US)
  • University of Pennsylvania (US)
Corresponding author
Lee, Shin J.
Venue
Molecular Metabolism
Publisher
Elsevier BV
Published
2018-05
Volume
11
Pages
33-46
ISSN
2212-8778 (ISSN-L)
OpenAlex
W2789458740
Cited by
95
References
104
Citations by year
2026: 8 · 2025: 9 · 2024: 15 · 2023: 11 · 2022: 9 · 2021: 18 · 2020: 9 · 2019: 12 · 2018: 4
FWCI
6.05
Type
journal article
Language
en
Open access
Locations
  • Molecular Metabolism (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • Repository for Publications and Research Data (ETH Zurich) (submittedVersion, cc-by-nc-nd)
  • ETH Zürich Research Collection
Funders
  • Eidgenössische Technische Hochschule Zürich (NS029728, IZK0Z3 173687, DK104897, 47 12-2, IZK0Z3 158027, NIH-DK096139)
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (PMPDP3_151360)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
glucagon-like peptide-1, dorsomedial hypothalamus, GLP-1 receptor, brown adipose tissue thermogenesis, adiposity, energy expenditure, UCP1, hepatic steatosis, de novo lipogenesis, insulin resistance, neuropeptide Y neurons, GABAergic neurons, exendin-4, energy balance, body weight regulation
MeSH terms
Glucagon-Like Peptide-1 Receptor, Uncoupling Protein 1, Exenatide, Animals, Adipose Tissue, Brown, Hypothalamus, Insulin Resistance, Male, Neuropeptide Y, Signal Transduction, Rats, Sprague-Dawley, Thermogenesis, Adiposity, Lipogenesis, Rats, Glucagon-Like Peptide 1, GABAergic Neurons

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