Cited by 603Adipokines, Inflammation, and Metabolic DiseasesAdipose Tissue and MetabolismPeroxisome Proliferator-Activated Receptors

The inflammation highway: metabolism accelerates inflammatory traffic in obesity

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Johnson, Amy R., Justin Milner, J., Makowski, Liza·2012·Immunological Reviews

Abstract

Summary: As humans evolved, perhaps the two strongest selection determinants of survival were a robust immune response able to clear bacterial, viral, and parasitic infection and an ability to efficiently store nutrients to survive times when food sources were scarce. These traits are not mutually exclusive. It is now apparent that critical proteins necessary for regulating energy metabolism, such as peroxisome proliferator‐activated receptors, Toll‐like receptors, and fatty acid‐binding proteins, also act as links between nutrient metabolism and inflammatory pathway activation in immune cells. Obesity in humans is a symptom of energy imbalance: the scale has been tipped such that energy intake exceeds energy output and may be a result, in part, of evolutionary selection toward a phenotype characterized by efficient energy storage. As discussed in this review, obesity is a state of low‐grade, chronic inflammation that promotes the development of insulin resistance and diabetes. Ironically, the formation of systemic and/or local, tissue‐specific insulin resistance upon inflammatory cell activation may actually be a protective mechanism that co‐evolved to repartition energy sources within the body during times of stress during infection. However, the point has been reached where a once beneficial adaptive trait has become detrimental to the health of the individual and an immense public health and economic burden. This article reviews the complex relationship between obesity, insulin resistance/diabetes, and inflammation, and although the liver, brain, pancreas, muscle, and other tissues are relevant, we focus specifically on how the obese adipose microenvironment can promote immune cell influx and sustain damaging inflammation that can lead to the onset of insulin resistance and diabetes. Finally, we address how substrate metabolism may regulate the immune response and discuss how fuel uptake and metabolism may be a targetable approach to limit or abrogate obesity‐induced inflammation.

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Crossref · 10.1111/j.1600-065x.2012.01151.x

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  • Hypertrophy leads to a multiple-fold increase in infiltration of macrophages in WAT, which promotes a pro-inflammatory and insulin resistant environment.

    “Hypertrophy leads to multiple fold increase in infiltration of macrophages in WAT (55, 56), which promotes a pro-inflammatory and insulin resistant environment.”

    From Metabolic impact of endogenously produced estrogens by adipose tissue in females and males across the lifespan (2025) · cites this paper as [56]

    The “Obesity and Inflammation, an Introduction” section reports a 4–5-fold increase in adipose macrophages from lean to obese states, but says they only *likely* infiltrate in response to stress from larger adipocytes; it reports a correlation with adipocyte size, not an established causal effect of hypertrophy. The “Adipose microenvironment > Macrophages” section links infiltrating pro-inflammatory macrophages to inflammation and impaired insulin sensitivity. Page numbers were not provided in the passages. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Macrophages that rely on fatty acid metabolism secrete anti-inflammatory cytokines and thus preserve insulin sensitivity of liver and adipose tissue (type M2).

    “Conversely, macrophages that rely on fatty acid metabolism secrete anti-inflammatory cytokines and thus preserve insulin sensitivity of liver and adipose tissue (type M2) (167, 168).”

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Authors
Johnson, A. R., Justin Milner, J., & Makowski, L.
Affiliations
  • University of North Carolina at Chapel Hill (US)
  • Department of Nutrition Gillings School of Global Public Health and School of Medicine University of North Carolina at Chapel Hill Chapel Hill NC USA
Corresponding author
Makowski, Liza
Venue
Immunological Reviews
Publisher
Wiley
Published
2012-08-14
Volume
249
Issue
1
Pages
218-238
ISSN
  • 0105-2896 (ISSN-L)
  • 1600-065X
OpenAlex
W1968604913
Cited by
603
References
290
Citations by year
2026: 9 · 2025: 25 · 2024: 26 · 2023: 38 · 2022: 40 · 2021: 57 · 2020: 46 · 2019: 67 · 2018: 47 · 2017: 62 · 2016: 51 · 2015: 41 · 2014: 46 · 2013: 42 · 2012: 4
FWCI
5.31
Type
journal article
Language
en
Open access
Locations
  • Immunological Reviews (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute on Alcohol Abuse and Alcoholism (AA017376, K99AA017376, R00AA017376)
  • National Cancer Institute (P50CA058223)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P30DK034987, P30DK056350)
  • National Institute of Environmental Health Sciences (U01ES019472, ES019472)
Topics
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
Keywords
obesity, low-grade inflammation, insulin resistance, type 2 diabetes, adipose tissue microenvironment, immune cell infiltration, energy metabolism, peroxisome proliferator-activated receptors, Toll-like receptors, fatty acid binding protein, substrate metabolism, immune regulation
MeSH terms
Adipose Tissue, Animals, B-Lymphocytes, Energy Intake, Diabetes Mellitus, Energy Metabolism, Humans, Inflammation, Insulin Resistance, Macrophages, Obesity, T-Lymphocytes, Peroxisome Proliferator-Activated Receptors, Fatty Acid-Binding Proteins, Toll-Like Receptors

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