Cited by 219Multiple Sclerosis Research StudiesMicroRNA in disease regulationNeuroinflammation and Neurodegeneration Mechanisms

miR‐155 as a multiple sclerosis–relevant regulator of myeloid cell polarization

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Moore, Craig S., Rao, Vijayaraghava T.S., Durafourt, Bryce A., Bedell, Barry J., Ludwin, Samuel K., Bar‐Or, Amit, Antel, Jack P.·2013·Annals of Neurology

Abstract

Objective: To define the functional significance of increased miR‐155 expression in myeloid cells in multiple sclerosis (MS). Methods: miR‐155 expression levels were measured in CD14 + monocytes from untreated relapsing–remitting MS patients and compared to healthy controls. Similar microRNA (miRNA) analyses were performed in laser‐captured CD68 + cells from perivascular (blood‐derived macrophages) and parenchymal (microglia) brain regions in both active MS lesions and noninflammatory cases. Using human adult blood‐derived macrophages and brain‐derived microglia, in vitro experiments were performed to demonstrate how miR‐155 influences the polarization state, phenotype, and functional properties of myeloid cells, in addition to their ability to subsequently impact adaptive T‐cell responses. Results: In MS, miR‐155 expression was significantly increased in both peripheral circulating CD14 + monocytes and active lesions (CD68 + cells) compared to control donor monocytes and parenchymal microglia, respectively. In vitro, miR‐155 was significantly increased in both M1‐polarized primary human macrophages and microglia. Transfection of an miR‐155 mimic increased proinflammatory cytokine secretion and costimulatory surface marker expression in both cell types; an miR‐155 inhibitor decreased proinflammatory cytokine expression. Coculture experiments demonstrated that allogeneic T‐cell responses were significantly enhanced in the presence of miR‐155–transfected myeloid cells compared to controls. Interpretation: Our results demonstrate that miR‐155 regulates proinflammatory responses in both blood‐derived and central nervous system (CNS)‐resident myeloid cells, in addition to impacting subsequent adaptive immune responses. Differential miRNA expression may therefore provide insight into mechanisms responsible for distinct phenotypic and functional properties of myeloid cells, thus impacting their ability to influence CNS injury and repair. Ann Neurol 2013;74:709–720

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Crossref · 10.1002/ana.23967

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  • Since many disorders share the same proteins or micro RNAs as markers, it is impossible to have selective detection of diseases.

    “Also, since many disorders share the same proteins or micro RNAs as markers, it is impossible to have selective detection of diseases [313–317].”
  • miR-155 is upregulated in M1-polarized macrophages and microglia, and in those cells in multiple sclerosis patients.

    “MiR-155 is upregulated in M1-polarized macrophages and microglia, and in those cells in patients with multiple sclerosis [248].”

    From MicroRNAs as Regulators of Phagocytosis (2022) · cites this paper as [248]

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Authors
Moore, C. S., Rao, V. T. S., Durafourt, B. A., Bedell, B. J., Ludwin, S. K., Bar‐Or, A., & Antel, J. P.
Affiliations
  • Montreal Neurological Institute and Hospital (CA)
  • Queen's University (CA)
Corresponding author
Moore, Craig S.
Venue
Annals of Neurology
Publisher
Wiley
Published
2013-09-23
Volume
74
Issue
5
Pages
709-720
ISSN
  • 0364-5134 (ISSN-L)
  • 1531-8249
OpenAlex
W1915908724
Cited by
219
References
48
Citations by year
2026: 8 · 2025: 6 · 2024: 13 · 2023: 11 · 2022: 13 · 2021: 15 · 2020: 25 · 2019: 26 · 2018: 23 · 2017: 24 · 2016: 23 · 2015: 15 · 2014: 15 · 2013: 2
FWCI
13.71
Type
journal article
Language
en
Open access
Locations
  • Annals of Neurology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Multiple Sclerosis Research Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
miR-155, multiple sclerosis, myeloid cell polarization, microglia, blood-derived macrophages, CD14+ monocytes, M1 macrophage polarization, inflammatory cytokines, costimulatory molecules, T cell response, relapsing-remitting multiple sclerosis, neuroinflammation
MeSH terms
Adult, Aged, Brain, Female, Humans, Macrophages, Male, Middle Aged, Multiple Sclerosis, T-Lymphocytes, Cell Polarity, Microglia, Myeloid Cells, MicroRNAs, Cell Proliferation, Adaptive Immunity

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