Cited by 36Neuroinflammation and Neurodegeneration MechanismsMultiple Sclerosis Research StudiesMicroRNA in disease regulation

Absence of miRNA-146a Differentially Alters Microglia Function and Proteome

Open access
Martin, Nellie A., Hyrlov, Kirsten H., Elkjaer, Maria L., Thygesen, Eva K., Wlodarczyk, Agnieszka, Elbaek, Kirstine J., Aboo, Christopher, Okarmus, Justyna +7 more·2020·Frontiers in Immunology

Abstract

Background: MiR-146a is an important regulator of innate inflammatory responses and is also implicated in cell death and survival. Methods: By sorting CNS resident cells, microglia were the main cellular source of miR-146a. Therefore, we investigated microglia function and phenotype in miR-146a knock-out (KO) mice, analyzed the proteome of KO and wild-type (WT) microglia by LC-MS/MS, and examined miR-146a expression in different brain lesions of patients with multiple sclerosis (MS). Results: When stimulated with LPS or myelin in vitro, microglia from KO mice expressed higher levels of IL-1β, TNF, IL-6, IL-10, CCL3, and CCL2 compared to WT. Stimulation increased migration and phagocytosis of WT but not KO microglia. CD11c+ microglia were induced by cuprizone (CPZ) in the WT mice but less in the KO. The proteome of ex vivo microglia was not different in miR-146a KO compared to WT mice, but CPZ treatment induced differential and reduced protein responses in the KO: GOT1, COX5b, CRYL1 and cystatin-C were specifically changed in KO microglia. We explored discriminative features of microglia proteomes: sparse Partial Least Squares-Discriminant Analysis showed the best discrimination when control and CPZ-treated conditions were compared. Cluster of ten proteins separated WT and miR-146a KO microglia after CPZ: among them were sensomes allowing to perceive the environment, Atp1a3 that belongs to the signature of CD11c+ microglia, and proteins related to inflammatory responses (S100A9, Ppm1g). Finally, we examined the expression of miR-146a and its validated target genes in different brain lesions of MS patients. MiR-146 was upregulated in all lesion types, and the highest expression was in active lesions. Nineteen of 88 validated target genes were significantly changed in active lesions, while none were changed in NAWM. Conclusion: Our data indicated that microglia is the major source of miR-146a in the CNS. The absence of miR-146a differentially affected microglia function and proteome, and miR-146a may play an important role in gene regulation of active MS lesions.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.3389/fimmu.2020.01110

Cites

73 of 73 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Martin, N. A., Hyrlov, K. H., Elkjaer, M. L., Thygesen, E. K., Wlodarczyk, A., Elbaek, K. J., Aboo, C., Okarmus, J., Benedikz, E., Reynolds, R., Hegedus, Z., Stensballe, A., Svenningsen, Å. F., Owens, T., & Illes, Z.
Affiliations
  • Odense University Hospital (DK)
  • Sino-Danish Centre for Education and Research (CN)
  • Imperial College London (GB)
  • Aalborg University (DK)
  • University of Southern Denmark (DK)
Venue
Frontiers in Immunology
Published
2020-06-05
Volume
11
Pages
1110-1110
ISSN
1664-3224 (ISSN-L)
OpenAlex
W3034149072
Cited by
36
References
73
Citations by year
2026: 2 · 2025: 3 · 2024: 12 · 2023: 10 · 2022: 2 · 2021: 5 · 2020: 1 · 2019: 1
FWCI
1.81
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Immunology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Repository of the Academy's Library (Library of the Hungarian Academy of Sciences) (acceptedVersion)
  • VBN Forskningsportal (Aalborg Universitet) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • University of Southern Denmark Research Portal (University of Southern Denmark) (submittedVersion, cc-by)
  • Spiral (Imperial College London) (submittedVersion, cc-by)
Funders
  • Lundbeckfonden
  • Jascha Fonden
  • Odense Universitetshospital
  • Scleroseforeningen
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Multiple Sclerosis Research Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
Keywords
miR-146a, microglia, microglial activation, cuprizone, multiple sclerosis, microglial migration, phagocytosis, inflammatory cytokines, miRNA target genes, brain lesions, innate immunity, microRNA knockout mice, PLS-DA
MeSH terms
Animals, Chelating Agents, Cuprizone, Demyelinating Diseases, Humans, Mice, Inbred C57BL, Multiple Sclerosis, Microglia, Mice, Knockout, Proteome, MicroRNAs, Mice

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review