Cited by 1,350Regulation of Appetite and ObesityAdipokines, Inflammation, and Metabolic DiseasesNF-κB Signaling Pathways

Hypothalamic IKKβ/NF-κB and ER Stress Link Overnutrition to Energy Imbalance and Obesity

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Zhang, Xiaoqing, Zhang, Guo, Zhang, Hai, Karin, Michael, Bai, Hua, Cai, Dongsheng·2008·Cell

Abstract

Overnutrition is associated with chronic inflammation in metabolic tissues. Whether metabolic inflammation compromises the neural regulatory systems and therefore promotes overnutrition-associated diseases remains unexplored. Here we show that a mediator of metabolic inflammation, IKKbeta/NF-kappaB, normally remains inactive although enriched in hypothalamic neurons. Overnutrition atypically activates hypothalamic IKKbeta/NF-kappaB at least in part through elevated endoplasmic reticulum stress in the hypothalamus. While forced activation of hypothalamic IKKbeta/NF-kappaB interrupts central insulin/leptin signaling and actions, site- or cell-specific suppression of IKKbeta either broadly across the brain or locally within the mediobasal hypothalamus, or specifically in hypothalamic AGRP neurons significantly protects against obesity and glucose intolerance. The molecular mechanisms involved include regulation by IKKbeta/NF-kappaB of SOCS3, a core inhibitor of insulin and leptin signaling. Our results show that the hypothalamic IKKbeta/NF-kappaB program is a general neural mechanism for energy imbalance underlying obesity and suggest that suppressing hypothalamic IKKbeta/NF-kappaB may represent a strategy to combat obesity and related diseases.

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Crossref · 10.1016/j.cell.2008.07.043

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  • SOCS-3 induced via the IKKβ-NFκβ pathway during cellular inflammation can contribute to leptin resistance and has been implicated in the pathogenesis of diet-induced obesity.

    “Since SOCS-3 can also be induced via the IKKβ-NFκβ pathway during cellular inflammation, this mechanism can contribute to leptin resistance in this setting (211) and has been implicated in the pathogenesis of diet-induced obesity (DIO) (87, 119, 211).”
  • Increasing SOCS-3 expression in the mediobasal hypothalamus using a lentiviral approach blocked the protection against diet-induced obesity conferred by AgRP-neuron-specific IKKβ knockout.

    “increasing SOCS-3 expression in the mediobasal hypothalamus using a lentiviral approach blocked the protection against DIO conferred by AgRP-neuron-specific IKKβ knockout (211).”
  • Interventions that reduce hypothalamic inflammation, either by reducing neuronal IKKβ signaling using gene therapy or by pharmacological administration of an IKKβ inhibitor, reduce food intake and body weight in diet-induced obese animals and maintain central leptin and insulin sensitivity.

    “interventions that reduce hypothalamic inflammation, either by reducing neuronal IKKβ signaling using a gene therapy approach (211) or by pharmacological administration of a IKKβ inhibitor, reduce food intake and body weight in DIO animals (148) and maintain central leptin and insulin sensitivity.”
  • Central administration of an ER stress inhibitor suppressed hypothalamic NF-κB levels in high-fat-fed rats and lowered both food intake and body weight in diet-induced obese animals.

    “central administration of an ER stress inhibitor suppressed hypothalamic NF-κB levels in HF-fed rats and lowered both food intake and body weight in DIO animals (211).”
  • Activation of hypothalamic IKKβ/NF-κB signaling using a gene therapy approach promotes hyperphagia and weight gain and reduces leptin and insulin signaling in mice.

    “activation of hypothalamic IKKβ/NF-κB signaling using a gene therapy approach promotes hyperphagia and weight gain and reduces leptin and insulin signaling in mice (211).”

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Authors
Zhang, X., Zhang, G., Zhang, H., Karin, M., Bai, H., & Cai, D.
Affiliations
  • University of Wisconsin–Madison (US)
  • University of California San Diego (US)
Corresponding author
Cai, Dongsheng
Venue
Cell
Publisher
Elsevier BV
Published
2008-10
Volume
135
Issue
1
Pages
61-73
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2077033935
Cited by
1,350
References
36
Citations by year
2026: 43 · 2025: 42 · 2024: 66 · 2023: 62 · 2022: 72 · 2021: 77 · 2020: 68 · 2019: 89 · 2018: 86 · 2017: 105 · 2016: 103 · 2015: 92 · 2014: 105 · 2013: 101 · 2012: 76
FWCI
24.08
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (R56, R01 DK078750, 1-07-JF-09)
  • College of Engineering, University of Wisconsin-Madison (R56, R01 DK078750, 1-07-JF-09)
  • American Diabetes Association (R56, R01 DK078750, 1-07-JF-09)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › NF-κB Signaling Pathways
Keywords
overnutrition, obesity, energy imbalance, hypothalamus, IKKβ, NF-κB, endoplasmic reticulum stress, metabolic inflammation, insulin signaling, leptin signaling, SOCS3, AgRP neurons, impaired glucose tolerance, mediobasal hypothalamus
MeSH terms
Suppressor of Cytokine Signaling 3 Protein, Animals, Endoplasmic Reticulum, Energy Metabolism, Humans, Hypothalamus, Immunity, Innate, Insulin Resistance, Mice, Inbred C57BL, Neurons, Obesity, Signal Transduction, NF-kappa B, I-kappa B Proteins, Overnutrition, Suppressor of Cytokine Signaling Proteins, Mice, Agouti-Related Protein

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