Cited by 131Neuroinflammation and Neurodegeneration MechanismsRegulation of Appetite and ObesityAdipokines, Inflammation, and Metabolic Diseases

Dietary sugars, not lipids, drive hypothalamic inflammation

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Gao, Yuanqing, Bielohuby, Maximilian, Fleming, Thomas, Grabner, Gernot F., Foppen, Ewout, Bernhard, Wagner, Guzmán-Ruiz, Mara, Layritz, Clarita +11 more·2017·Molecular Metabolism

Abstract

OBJECTIVE: The hypothalamus of hypercaloric diet-induced obese animals is featured by a significant increase of microglial reactivity and its associated cytokine production. However, the role of dietary components, in particular fat and carbohydrate, with respect to the hypothalamic inflammatory response and the consequent impact on hypothalamic control of energy homeostasis is yet not clear. METHODS: We dissected the different effects of high-carbohydrate high-fat (HCHF) diets and low-carbohydrate high-fat (LCHF) diets on hypothalamic inflammatory responses in neurons and non-neuronal cells and tested the hypothesis that HCHF diets induce hypothalamic inflammation via advanced glycation end-products (AGEs) using mice lacking advanced glycation end-products (AGEs) receptor (RAGE) and/or the activated leukocyte cell-adhesion molecule (ALCAM). RESULTS: We found that consumption of HCHF diets, but not of LCHF diets, increases microgliosis as well as the presence of N(ε)-(Carboxymethyl)-Lysine (CML), a major AGE, in POMC and NPY neurons of the arcuate nucleus. Neuron-secreted CML binds to both RAGE and ALCAM, which are expressed on endothelial cells, microglia, and pericytes. On a HCHF diet, mice lacking the RAGE and ALCAM genes displayed less microglial reactivity and less neovasculature formation in the hypothalamic ARC, and this was associated with significant improvements of metabolic disorders induced by the HCHF diet. CONCLUSIONS: , leads to excessive CML production in hypothalamic neurons, which, in turn, stimulates hypothalamic inflammatory responses such as microgliosis and eventually leads to neuronal dysfunction in the control of energy metabolism.

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Crossref · 10.1016/j.molmet.2017.06.008

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  • The presence of excess sugar in a high-fat diet was necessary for hypothalamic inflammatory responses in mice, including activation of microglia.

    “The presence of excess sugar in a HFD was shown to be necessary for hypothalamic inflammatory responses in mice, including the activation of microglia, the resident immune cells of the brain [58].”

    From The menace of obesity to depression and anxiety prevalence (2022) · cites this paper as [58]

  • AGEs are implicated in the development of numerous chronic diseases including diabetes-related complications, cardiovascular, renal, and neurodegenerative disease, and have recently been implicated in hypothalamic inflammation and obesity.

    “Advanced glycation end products (AGEs) are a complex and heterogeneous group of protein, lipid, and DNA adducts implicated in the development of numerous chronic diseases including diabetes related complications, cardiovascular, renal, and neurodegenerative disease, and have recently also been implicated in hypothalamic inflammation and obesity.[1]”
  • AGEs are produced endogenously as part of normal metabolism and during cooking and processing of food, and a significant proportion is absorbed in the gastrointestinal tract.

    “AGEs are produced both naturally in the body, as part of normal metabolism, and during the cooking and processing of food with a significant proportion being absorbed in the gastrointestinal tract.”
  • In mice, knockdown of both RAGE and ALCAM was required to block the proinflammatory effects of CML.

    “In mice, where AGEs were identified as being the mechanism by which a high-fat diet causes hypothalamic inflammation, knockdown of both RAGE and AL-CAM was required to block the proinflammatory effects of CML.[1]”
  • A diet high in both lipids and carbohydrates is required to induce a significant increase in hypothalamic inflammation in rodents associated with an increase in body weight.

    “In support of this, a diet high in both lipids and carbohydrates is required to induce a significant increase in hypothalamic inflammation in rodents associated with an increase in body weight.[1,150]”

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Authors
Gao, Y., Bielohuby, M., Fleming, T., Grabner, G. F., Foppen, E., Bernhard, W., Guzmán-Ruiz, M., Layritz, C., Legutko, B., Zinser, E., García-Cáceres, C., Buijs, R. M., Woods, S. C., Kalsbeek, A., Seeley, R. J., Nawroth, P. P., Bidlingmaier, M., Tschöp, M. H., & Yi, C.-X.
Affiliations
  • Amsterdam UMC Location University of Amsterdam (NL)
  • LMU Klinikum (DE)
  • University Hospital Heidelberg (DE)
  • University of Graz (AT)
  • Helmholtz Munich (DE)
  • FH JOANNEUM University of Applied Sciences (AT)
  • Universidad Nacional Autónoma de México (MX)
  • University of Cincinnati (US)
  • Netherlands Institute for Neuroscience (NL)
  • University of Michigan (US)
Corresponding author
  • Bidlingmaier, Martin
  • Tschöp, Matthias H.
  • Yi, Chun-Xia
Venue
Molecular Metabolism
Publisher
Elsevier BV
Published
2017-08
Volume
6
Issue
8
Pages
897-908
ISSN
2212-8778 (ISSN-L)
OpenAlex
W2652575518
Cited by
131
References
41
Citations by year
2026: 6 · 2025: 10 · 2024: 12 · 2023: 15 · 2022: 18 · 2021: 23 · 2020: 13 · 2019: 22 · 2018: 9 · 2017: 2 · 2015: 1
FWCI
6.27
Type
journal article
Language
en
Open access
Locations
  • Molecular Metabolism (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Pure Amsterdam UMC (publishedVersion, other-oa)
  • KNAW Research Portal (The Royal Netherlands Academy of Arts and Sciences) (publishedVersion, other-oa)
  • FH JOANNEUM ePUB (submittedVersion, cc-by-nc-nd)
  • PuSH - Publication Server of Helmholtz Zentrum München (submittedVersion, cc-by-nc-nd)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • Open access LMU (Ludwid Maxmilian's Universitat Munchen) (submittedVersion, cc-by-nc-nd)
  • mediaTUM (Technical University of Munich) (submittedVersion)
  • Site cant be reached (submittedVersion, cc-by-nc-nd)
Funders
  • Daiichi-Sankyo
  • Alexander von Humboldt-Stiftung
  • Deutsche Forschungsgemeinschaft (SFB1123, ANR- 15-CE14-0030, SFB1118)
  • U.S. Department of Homeland Security
  • Novartis
  • Novo Nordisk
  • Academisch Medisch Centrum
  • Helmholtz Association
  • European Research Council (695054)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
hypothalamic inflammation, dietary sugar, high-fat high-carbohydrate diet, advanced glycation end products, carboxymethyllysine, microglial activation, RAGE, ALCAM, arcuate nucleus, POMC neurons, NPY neurons, neovasculature, energy homeostasis, obesity, hypercaloric diet, endothelial cells, pericytes
MeSH terms
Receptor for Advanced Glycation End Products, Dietary Sugars, Animals, Dietary Fats, Gliosis, Hypothalamus, Inflammation, Male, Mice, Inbred C57BL, Glycation End Products, Advanced, Activated-Leukocyte Cell Adhesion Molecule, Mice, Rats

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