Cited by 33Adipose Tissue and MetabolismAdipokines, Inflammation, and Metabolic DiseasesRegulation of Appetite and Obesity

Divergent responses to thermogenic stimuli in BAT and subcutaneous adipose tissue from interleukin 18 and interleukin 18 receptor 1-deficient mice

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Pazos, Patricia, Lima, Luis, Tovar, Sulay, González-Touceda, David, Diéguez, Carlos, García, María C.·2015·Scientific Reports

Abstract

Brown and beige adipocytes recruitment in brown (BAT) or white adipose tissue, mainly in the inguinal fat pad (iWAT), meet the need for temperature adaptation in cold-exposure conditions and protect against obesity in face of hypercaloric diets. Using interleukin18 (Il18) and Il18 receptor 1- knockout (Il18r1-KO) mice, this study aimed to investigate the role of IL18 signaling in BAT and iWAT activation and thermogenesis under both stimuli. Il18-KO, extremely dietary obesity-prone as previously described, failed to develop diet-induced thermogenesis as assessed by BAT and iWAT Ucp1 mRNA levels. Overweight when fed standard chow but not HFD, HFD-fed Il18r1-KO mice exhibited increased iWAT Ucp1 gene expression. Energy expenditure was reduced in pre-obese Il18r1-KO mice and restored upon HFD-challenge. Cold exposure lead to similar results; Il18r1-KO mice were protected against acute body temperature drop, displaying a more brown-like structure, alternative macrophage activation and thermogenic gene expression in iWAT than WT controls. Opposite effects were observed in Il18-KO mice. Thus, Il18 and Il18r1 genetic ablation disparate effects on energy homeostasis are likely mediated by divergent BAT responses to thermogenic stimuli as well as iWAT browning. These results suggest that a more complex receptor-signaling system mediates the IL18 adipose-tissue specific effects in energy expenditure.

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Authors
Pazos, P., Lima, L., Tovar, S., González-Touceda, D., Diéguez, C., & García, M. C.
Affiliations
Universidade de Santiago de Compostela (ES)
Venue
Scientific Reports
Published
2015-12-10
Volume
5
Issue
1
Pages
17977-17977
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2286067730
Cited by
33
References
56
Citations by year
2026: 3 · 2025: 1 · 2024: 3 · 2023: 1 · 2022: 3 · 2021: 2 · 2020: 3 · 2019: 5 · 2018: 7 · 2017: 3 · 2016: 2
FWCI
2.95
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (publishedVersion, cc-by)
  • Hispana (submittedVersion, cc-by)
  • Repositorio institucional da Universidade de Santiago de Compostela (University of Santiago de Compostela) (submittedVersion, cc-by)
Funders
  • European Commission (245009)
  • Ministerio de Economía y Competitividad (GPC2014/030, BFU2007-62683/BFI, CB06/03, PGIDIT06PXIB208067PR)
  • Xunta de Galicia (BFU2007-62683/BFI, CB06/03, PGIDIT06PXIB208067PR, GPC2014/030)
  • Centro de Investigación Biomédica en Red-Fisiopatología de la Obesidad y Nutrición (CB06/03)
  • Instituto de Salud Carlos III (CB06/03)
Topics
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
IL-18, brown adipose tissue, subcutaneous adipose tissue, thermogenesis, diet-induced thermogenesis, cold exposure, UCP1, beige adipocytes, adipose tissue browning, energy expenditure, obesity, macrophage activation, energy homeostasis
MeSH terms
Animals, Adipose Tissue, Brown, Cold Temperature, Energy Metabolism, Phenotype, Gene Expression, Mice, Knockout, Interleukin-18, Thermogenesis, Subcutaneous Fat, Mice, Receptors, Interleukin-18, Diet, High-Fat

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