Cited by 396Atherosclerosis and Cardiovascular DiseasesMicroRNA in disease regulationCholesterol and Lipid Metabolism

MicroRNA-33-dependent regulation of macrophage metabolism directs immune cell polarization in atherosclerosis

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Ouimet, Mireille, Ediriweera, Hasini N., Gundra, U. Mahesh, Sheedy, Frederick J., Ramkhelawon, Bhama, Hutchison, Susan B., Rinehold, Kaitlyn, van Solingen, Coen +8 more·2015·Journal of Clinical Investigation

Abstract

Cellular metabolism is increasingly recognized as a controller of immune cell fate and function. MicroRNA-33 (miR-33) regulates cellular lipid metabolism and represses genes involved in cholesterol efflux, HDL biogenesis, and fatty acid oxidation. Here, we determined that miR-33-mediated disruption of the balance of aerobic glycolysis and mitochondrial oxidative phosphorylation instructs macrophage inflammatory polarization and shapes innate and adaptive immune responses. Macrophage-specific Mir33 deletion increased oxidative respiration, enhanced spare respiratory capacity, and induced an M2 macrophage polarization-associated gene profile. Furthermore, miR-33-mediated M2 polarization required miR-33 targeting of the energy sensor AMP-activated protein kinase (AMPK), but not cholesterol efflux. Notably, miR-33 inhibition increased macrophage expression of the retinoic acid-producing enzyme aldehyde dehydrogenase family 1, subfamily A2 (ALDH1A2) and retinal dehydrogenase activity both in vitro and in a mouse model. Consistent with the ability of retinoic acid to foster inducible Tregs, miR-33-depleted macrophages had an enhanced capacity to induce forkhead box P3 (FOXP3) expression in naive CD4(+) T cells. Finally, treatment of hypercholesterolemic mice with miR-33 inhibitors for 8 weeks resulted in accumulation of inflammation-suppressing M2 macrophages and FOXP3(+) Tregs in plaques and reduced atherosclerosis progression. Collectively, these results reveal that miR-33 regulates macrophage inflammation and demonstrate that miR-33 antagonism is atheroprotective, in part, by reducing plaque inflammation by promoting M2 macrophage polarization and Treg induction.

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Crossref · 10.1172/jci81676

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  • Several studies have found that antagonism of miR-33 can reduce atherosclerotic plaque burden.

    “several studies have found that antagonism of miR-33 can reduce atherosclerotic plaque burden (Karunakaran et al., 2015; Ouimet et al., 2015; Rayner et al., 2011b; Rotllan et al., 2013).”
  • Inhibition of miR-33a or miR-33a deletion in macrophages affects myeloid cell differentiation, induces M2 macrophage polarization with mitochondrial respiratory and metabolic changes, and enhances autophagy.

    “Inhibition of miR-33a or miR-33a deletion in macrophages has been shown to affect myeloid cell differentiation 25) , induce M2 macrophage polarization with mitochondrial respiratory and metabolic changes 26 , 27) , and enhance autophagy 28 , 29) .”
  • miR-33 is overexpressed in M1, thus promoting pro-inflammatory functions.

    “Expression of miR-33 is also overexpressed in M1, thus promoting pro-inflammatory functions [132].”

    From MicroRNAs as Regulators of Phagocytosis (2022) · cites this paper as [132]

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Authors
Ouimet, M., Ediriweera, H. N., Gundra, U. M., Sheedy, F. J., Ramkhelawon, B., Hutchison, S. B., Rinehold, K., van Solingen, C., Fullerton, M. D., Cecchini, K., Rayner, K. J., Steinberg, G. R., Zamore, P. D., Fisher, E. A., Loke, P., & Moore, K. J.
Affiliations
  • New York University (US)
  • University of Ottawa (CA)
  • Howard Hughes Medical Institute (US)
  • McMaster University (CA)
  • NYU Langone Health (US)
Venue
Journal of Clinical Investigation
Published
2015-10-26
Volume
125
Issue
12
Pages
4334-4348
ISSN
  • 0021-9738 (ISSN-L)
  • 1558-8238
OpenAlex
W2123366371
Cited by
394
References
67
Citations by year
2026: 19 · 2025: 21 · 2024: 27 · 2023: 37 · 2022: 24 · 2021: 45 · 2020: 45 · 2019: 46 · 2018: 35 · 2017: 47 · 2016: 33 · 2015: 1 · 2014: 1 · 2012: 1
FWCI
19.07
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • American Heart Association (14POST20180018, 15POST25090199)
  • NYU Langone Medical Center (P30CA016087)
  • Canada Research Chairs
  • National Institutes of Health (UL1TR000038, TR000038)
  • Canadian Institutes of Health Research
  • National Heart, Lung, and Blood Institute (R01HL084312, HL-084312, HL098055, P01HL098055, R01HL119047, R01HL108182, T32HL098129)
  • National Cancer Institute (P30CA016087)
  • National Institute of Allergy and Infectious Diseases (R21AI094166, R01AI093811, R01AI094166, T32AI007180)
  • National Center for Advancing Translational Sciences
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Atherosclerosis and Cardiovascular Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
Keywords
microRNA-33, macrophage polarization, M2 macrophages, atherosclerosis, aerobic glycolysis, mitochondrial oxidative phosphorylation, AMPK, ALDH1A2, retinoic acid, regulatory T cells, Foxp3, plaque inflammation, hypercholesterolemia, atheroprotection, lipid metabolism
MeSH terms
Aldehyde Dehydrogenase 1 Family, Aldehyde Dehydrogenase, Animals, Gene Expression Regulation, Glycolysis, Oxygen Consumption, Macrophages, Peritoneal, Mice, Knockout, MicroRNAs, Atherosclerosis, T-Lymphocytes, Regulatory, Retinal Dehydrogenase, Mice, Forkhead Transcription Factors, AMP-Activated Protein Kinases, Plaque, Atherosclerotic

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