Cited by 2,230Adipokines, Inflammation, and Metabolic DiseasesAdipose Tissue and MetabolismCardiovascular Disease and Adiposity

CD8+ effector T cells contribute to macrophage recruitment and adipose tissue inflammation in obesity

Nishimura, Satoshi, Manabe, Ichiro, Nagasaki, Mika, Eto, Koji, Yamashita, Hiroshi, Ohsugi, Mitsuru, Otsu, Makoto, Hara, Kazuo +5 more·2009·Nature Medicine

Abstract

Inflammation is increasingly regarded as a key process underlying metabolic diseases in obese individuals. In particular, obese adipose tissue shows features characteristic of active local inflammation. At present, however, little is known about the sequence of events that comprises the inflammatory cascade or the mechanism by which inflammation develops. We found that large numbers of CD8(+) effector T cells infiltrated obese epididymal adipose tissue in mice fed a high-fat diet, whereas the numbers of CD4(+) helper and regulatory T cells were diminished. The infiltration by CD8(+) T cells preceded the accumulation of macrophages, and immunological and genetic depletion of CD8(+) T cells lowered macrophage infiltration and adipose tissue inflammation and ameliorated systemic insulin resistance. Conversely, adoptive transfer of CD8(+) T cells to CD8-deficient mice aggravated adipose inflammation. Coculture and other in vitro experiments revealed a vicious cycle of interactions between CD8(+) T cells, macrophages and adipose tissue. Our findings suggest that obese adipose tissue activates CD8(+) T cells, which, in turn, promote the recruitment and activation of macrophages in this tissue. These results support the notion that CD8(+) T cells have an essential role in the initiation and propagation of adipose inflammation.

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Crossref · 10.1038/nm.1964

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Authors
Nishimura, S., Manabe, I., Nagasaki, M., Eto, K., Yamashita, H., Ohsugi, M., Otsu, M., Hara, K., Ueki, K., Sugiura, S., Yoshimura, K., Kadowaki, T., & Nagai, R.
Affiliations
  • The University of Tokyo (JP)
  • Japan Science and Technology Agency (JP)
  • Institute of Medical Science, The University of Tokyo (JP)
Corresponding author
  • Nishimura, Satoshi
  • Manabe, Ichiro
Venue
Nature Medicine
Published
2009-07-26
Volume
15
Issue
8
Pages
914-920
ISSN
  • 1078-8956 (ISSN-L)
  • 1546-170X
OpenAlex
W2165334726
Cited by
2,230
References
24
Citations by year
2026: 64 · 2025: 83 · 2024: 108 · 2023: 106 · 2022: 123 · 2021: 170 · 2020: 133 · 2019: 130 · 2018: 138 · 2017: 158 · 2016: 147 · 2015: 148 · 2014: 140 · 2013: 198 · 2012: 131
FWCI
86.11
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science (21390278, 21390321)
Topics
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Disease and Adiposity
Keywords
CD8+ effector T cells, macrophage recruitment, adipose tissue inflammation, obesity, insulin resistance, macrophage-T cell interaction, high-fat diet, CD4+ T helper cells, regulatory T cells, obesity-related diabetes
MeSH terms
Adipose Tissue, Animals, Cell Movement, Chemotaxis, Leukocyte, Diet, Atherogenic, Inflammation, Macrophages, Mice, Inbred C57BL, Mice, Obese, Obesity, Down-Regulation, Adipocytes, CD8-Positive T-Lymphocytes, Lymphocyte Count, Mice

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