Cited by 66Adipokines, Inflammation, and Metabolic DiseasesAdipose Tissue and MetabolismRegulation of Appetite and Obesity

Beneficial metabolic activities of inflammatory cytokine interleukin 15 in obesity and type 2 diabetes

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Ye, Jianping·2015·Frontiers of Medicine

Abstract

In obesity, chronic inflammation is believed to induce insulin resistance and impairs adipose tissue function. Although this view is supported by a large body of literature, it has been challenged by growing evidence that pro-inflammatory cytokines may favor insulin sensitivity through induction of energy expenditure. In this review article, interleukin 15 (IL-15) is used as a new example to explain the beneficial effects of the proinflammatory cytokines. IL-15 is secreted by multiple types of cells including macrophages, neutrophils and skeletal muscle cells. IL-15 expression is induced in immune cells by endotoxin and in muscle cells by physical exercise. Its transcription is induced by transcription factor NF-κB. IL-15 binds to its receptor that contains three different subunits (α, β and γ) to activate JAK/STAT, PI3K/Akt, IKK/NF-κB and JNK/AP1 pathways in cells. In the regulation of metabolism, IL-15 reduces weight gain without inhibiting food intake in rodents. IL-15 suppresses lipogenesis, stimulates brown fat function, improves insulin sensitivity through weight loss and energy expenditure. In human, circulating IL-15 is negatively associated with body weight. In the immune system, IL-15 stimulates proliferation and differentiation of T cells, NK cells, monocytes and neutrophils. In the anti-obesity effects of IL-15, T cells and NK cells are not required, but leptin receptor is required. In summary, evidence from human and rodents supports that the pro-inflammatory cytokine IL-15 may enhance energy expenditure to protect the body from obesity and type 2 diabetes. The mechanism of IL-15 action remains to be fully uncovered in the regulation of energy expenditure.

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Authors
Ye, J.
Affiliations
Pennington Biomedical Research Center (US)
Corresponding author
Ye, Jianping
Venue
Frontiers of Medicine
Published
2014-12-15
Volume
9
Issue
2
Pages
139-145
ISSN
  • 1673-7342 (ISSN-L)
  • 2095-0217
  • 2095-0225
OpenAlex
W2065202890
Cited by
66
References
46
Citations by year
2026: 4 · 2025: 4 · 2024: 5 · 2023: 1 · 2022: 5 · 2021: 6 · 2020: 8 · 2019: 7 · 2018: 9 · 2017: 6 · 2016: 7 · 2015: 4
FWCI
0.76
Type
journal article
Language
en
Open access
Locations
  • Frontiers of Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-085495, R56DK068036, R01DK085495, R01DK068036, DK068036)
Topics
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
IL-15, obesity, type 2 diabetes, energy expenditure, insulin sensitivity, inflammatory cytokines, brown adipose tissue, lipogenesis, leptin receptor, NF-κB signaling, JAK/STAT signaling, PI3K/Akt signaling, immune cells, weight gain
MeSH terms
Animals, Diabetes Mellitus, Type 2, Humans, Inflammation, Obesity, Interleukin-15, Rats

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