Cited by 47Peroxisome Proliferator-Activated ReceptorsAtherosclerosis and Cardiovascular DiseasesAdipokines, Inflammation, and Metabolic Diseases

PPAR agonist-induced reduction of Mcp1 in atherosclerotic plaques of obese, insulin-resistant mice depends on adiponectin-induced Irak3 expression

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Hulsmans, Maarten, Geeraert, Benjamine, Arnould, Thierry, Tsatsanis, Christos, Holvoet, Paul·2013·PLoS ONE

Abstract

Synthetic peroxisome proliferator-activated receptor (PPAR) agonists are used to treat dyslipidemia and insulin resistance. In this study, we examined molecular mechanisms that explain differential effects of a PPARα agonist (fenofibrate) and a PPARγ agonist (rosiglitazone) on macrophages during obesity-induced atherogenesis. Twelve-week-old mice with combined leptin and LDL-receptor deficiency (DKO) were treated with fenofibrate, rosiglitazone or placebo for 12 weeks. Only rosiglitazone improved adipocyte function, restored insulin sensitivity, and inhibited atherosclerosis by decreasing lipid-loaded macrophages. In addition, it increased interleukin-1 receptor-associated kinase-3 (Irak3) and decreased monocyte chemoattractant protein-1 (Mcp1) expressions, indicative of a switch from M1 to M2 macrophages. The differences between fenofibrate and rosiglitazone were independent of Pparγ expression. In bone marrow-derived macrophages (BMDM), we identified the rosiglitazone-associated increase in adiponectin as cause of the increase in Irak3. Interestingly, the deletion of Irak3 in BMDM (IRAK3(-/-) BMDM) resulted in activation of the canonical NFκB signaling pathway and increased Mcp1 protein secretion. Rosiglitazone could not decrease the elevated Mcp1 secretion in IRAK3(-/-) BMDM directly and fenofibrate even increased the secretion, possibly due to increased mitochondrial reactive oxygen species production. Furthermore, aortic extracts of high-fat insulin-resistant LDL-receptor deficient mice, with lower adiponectin and Irak3 and higher Mcp1, showed accelerated atherosclerosis. In aggregate, our results emphasize an interaction between PPAR agonist-mediated increase in adiponectin and macrophage-associated Irak3 in the protection against atherosclerosis by PPAR agonists.

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Authors
Hulsmans, M., Geeraert, B., Arnould, T., Tsatsanis, C., & Holvoet, P.
Affiliations
  • KU Leuven (BE)
  • University of Namur (BE)
  • University of Crete (GR)
Corresponding author
Holvoet, Paul
Venue
PLoS ONE
Published
2013-04-19
Volume
8
Issue
4
Pages
e62253
ISSN
1932-6203 (ISSN-L)
OpenAlex
W1990837317
Cited by
39
References
47
Citations by year
2026: 1 · 2025: 1 · 2024: 5 · 2023: 2 · 2022: 3 · 2021: 3 · 2020: 1 · 2019: 4 · 2018: 2 · 2017: 4 · 2016: 5 · 2015: 4 · 2014: 4
FWCI
1.94
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Repository of the University of Namur (publishedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Vlaamse regering
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
  • Life Sciences › Immunology and Microbiology › Immunology › Atherosclerosis and Cardiovascular Diseases
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
PPAR agonists, rosiglitazone, fenofibrate, adiponectin, IRAK3, MCP-1, atherosclerosis, macrophage polarization, M1/M2 macrophages, obesity, insulin resistance, NF-κB signaling, mitochondrial reactive oxygen species, LDL receptor-deficient mice, leptin deficiency, bone marrow-derived macrophages
MeSH terms
Rosiglitazone, Animals, Inflammation, Insulin, Insulin Resistance, Macrophages, Mice, Inbred C57BL, Obesity, Fenofibrate, Adipocytes, Chemokine CCL2, Leptin, Thiazolidinediones, Peroxisome Proliferator-Activated Receptors, PPAR alpha, PPAR gamma, Mice, Adiponectin, Interleukin-1 Receptor-Associated Kinases, Plaque, Atherosclerotic, Diet, High-Fat

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