Cited by 42Neuroinflammation and Neurodegeneration MechanismsMicroRNA in disease regulationNeurogenesis and neuroplasticity mechanisms

miR‐124 Contributes to the functional maturity of microglia

Svahn, Adam J., Giacomotto, Jean, Graeber, Manuel B., Rinkwitz, Silke, Becker, Thomas S.·2016·Developmental Neurobiology

Abstract

During early development of the central nervous system (CNS), a subset of yolk‐sac derived myeloid cells populate the brain and provide the seed for the microglial cell population, which will self‐renew throughout life. As development progresses, individual microglial cells transition from a phagocytic amoeboid state through a transitional morphing phase into the sessile, ramified, and normally nonphagocytic microglia observed in the adult CNS under healthy conditions. The molecular drivers of this tissue‐specific maturation profile are not known. However, a survey of tissue resident macrophages identified miR‐124 to be expressed in microglia. In this study, we used transgenic zebrafish to overexpress miR‐124 in the mpeg1 expressing yolk‐sac‐derived myeloid cells that seed the microglia. In addition, a systemic sponge designed to neutralize the effects of miR‐124 was used to assess microglial development in a miR‐124 loss‐of‐function environment. Following the induction of miR‐124 overexpression, microglial motility and phagocytosis of apoptotic cells were significantly reduced. miR‐124 overexpression in microglia resulted in the accumulation of residual apoptotic cell bodies in the optic tectum, which could not be achieved by miR‐124 overexpression in differentiated neurons. Conversely, expression of the miR‐124 sponge caused an increase in the motility of microglia and transiently rescued motility and phagocytosis functions when activated simultaneously with miR‐124 overexpression. This study provides in vivo evidence that miR‐124 activity has a key role in the development of functionally mature microglia. © 2015 Wiley Periodicals, Inc. Develop Neurobiol 76: 507–518, 2016

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Crossref · 10.1002/dneu.22328

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  • miR-124 is identified in microglia but not in other macrophages.

    “MiR-124 was identified in microglia, but not in other macrophages.”

    From MicroRNAs as Regulators of Phagocytosis (2022) · cites this paper as [234]

  • In zebrafish, overexpression of miR-124 reduces microglia motility and phagocytosis, causing accumulation of residual apoptotic cell bodies in the optic tectum.

    “In a zebrafish model it was demonstrated that overexpression of miR-124 reduces microglia motility and phagocytosis, which resulted in accumulation of residual apoptotic cell bodies in the optic tectum [234].”

    From MicroRNAs as Regulators of Phagocytosis (2022) · cites this paper as [234]

  • miR-124 is a brain-enriched microRNA that is highly expressed in microglia and is critical for maintaining microglia in a quiescent state.

    “MicroRNA-124 (miR-124), a brain-enriched microRNA, is known to regulate microglial quiescence.”
  • miR-124 is highly expressed in microglia and is critical for maintaining microglia in a quiescent state.

    “It has been well-recognized that miR-124 is highly expressed in microglia and is critical for maintaining microglia in a quiescent state (Ponomarev et al., 2011; Veremeyko et al., 2013; Svahn et al., 2016).”

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Authors
Svahn, A. J., Giacomotto, J., Graeber, M. B., Rinkwitz, S., & Becker, T. S.
Affiliations
The University of Sydney (AU)
Corresponding author
Becker, Thomas S.
Venue
Developmental Neurobiology
Publisher
Wiley
Published
2015-07-25
Volume
76
Issue
5
Pages
507-518
ISSN
  • 1932-8451 (ISSN-L)
  • 1932-846X
OpenAlex
W2146247875
Cited by
42
References
54
Citations by year
2025: 3 · 2024: 2 · 2023: 3 · 2022: 7 · 2021: 1 · 2020: 4 · 2019: 6 · 2018: 4 · 2017: 3 · 2016: 9
FWCI
2.85
Type
journal article
Language
en
Open access
closed
Locations
  • Developmental Neurobiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Australian Research Council (ARC DP150104472)
  • National Health and Medical Research Council (NHMRC APP1010713)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
miR-124, microglial development, microglial maturation, microglial motility, phagocytosis of apoptotic cells, microglial phagocytosis, zebrafish, microRNA sponge, optic tectum, central nervous system development
MeSH terms
Animals, Cell Movement, Cell Survival, Macrophages, Membrane Proteins, Neurons, Phagocytosis, Superior Colliculi, Zebrafish, Apoptosis, Sequence Homology, Microglia, Zebrafish Proteins, Animals, Genetically Modified, MicroRNAs, Gene Knockdown Techniques

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