Cited by 38Regulation of Appetite and ObesityAdipokines, Inflammation, and Metabolic DiseasesHypothalamic control of reproductive hormones

Gut hormone GIP induces inflammation and insulin resistance in the hypothalamus

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Fu, Yukiko, Kaneko, Kentaro, Lin, Hsiao-Yun, Mo, Qianxing, Xu, Yong, Suganami, Takayoshi, Ravn, Peter, Fukuda, Makoto·2020·Endocrinology

Abstract

The hypothalamus plays a critical role in controlling energy balance. High-fat diet (HFD) feeding increases the gene expression of proinflammatory mediators and decreases insulin actions in the hypothalamus. Here, we show that a gut-derived hormone, glucose-dependent insulinotropic polypeptide (GIP), whose levels are elevated during diet-induced obesity, promotes and mediates hypothalamic inflammation and insulin resistance during HFD-induced obesity. Unbiased ribonucleic acid sequencing of GIP-stimulated hypothalami revealed that hypothalamic pathways most affected by intracerebroventricular (ICV) GIP stimulation were related to inflammatory-related responses. Subsequent analysis demonstrated that GIP administered either peripherally or centrally, increased proinflammatory-related factors such as Il-6 and Socs3 in the hypothalamus, but not in the cortex of C57BL/6J male mice. Consistently, hypothalamic activation of IκB kinase-β inflammatory signaling was induced by ICV GIP. Further, hypothalamic levels of proinflammatory cytokines and Socs3 were significantly reduced by an antagonistic GIP receptor (GIPR) antibody and by GIPR deficiency. Additionally, centrally administered GIP reduced anorectic actions of insulin in the brain and diminished insulin-induced phosphorylation of Protein kinase B and Glycogen synthase kinase 3β in the hypothalamus. Collectively, these findings reveal a previously unrecognized role for brain GIP signaling in diet-induced inflammation and insulin resistance in the hypothalamus.

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Authors
Fu, Y., Kaneko, K., Lin, H.-Y., Mo, Q., Xu, Y., Suganami, T., Ravn, P., & Fukuda, M.
Affiliations
  • Baylor College of Medicine (US)
  • Research Institute of Environmental Medicine, Nagoya University (JP)
  • AstraZeneca (United Kingdom) (GB)
Corresponding author
  • Mo, Qianxing
  • Fukuda, Makoto
Venue
Endocrinology
Published
2020-06-30
Volume
161
Issue
9
ISSN
  • 0013-7227 (ISSN-L)
  • 1945-7170
OpenAlex
W3038304001
Cited by
38
References
86
Citations by year
2026: 2 · 2025: 10 · 2024: 5 · 2023: 4 · 2022: 8 · 2021: 7 · 2020: 2
FWCI
2.69
Type
journal article
Language
en
Open access
Locations
  • Endocrinology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Agriculture
  • Agriculture Research Services (AHA-14BGIA20460080, 6250-51000-055, NIH-P30-DK079638)
  • National Institutes of Health (R01DK104901, AHA-15POST22500012)
  • Uehara Memorial Foundation (201340214)
  • P30 Digestive Disease Center Support (NIDDK-DK56338)
  • P30 Cancer Center Support (NCI-CA125123)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
glucose-dependent insulinotropic polypeptide, hypothalamus, hypothalamic inflammation, insulin resistance, diet-induced obesity, high-fat diet, gut-brain axis, GIP receptor, interleukin-6, SOCS3, insulin signaling, Akt, glycogen synthase kinase-3β, energy balance
MeSH terms
Animals, Encephalitis, Gastric Inhibitory Polypeptide, Hypothalamus, Inflammation, Insulin Resistance, Male, Mice, Inbred C57BL, Mice, Obese, Receptors, Gastrointestinal Hormone, Signal Transduction, Up-Regulation, Mice, Knockout, Mice, Infusions, Intraventricular, Diet, High-Fat

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