Cited by 197Neurogenesis and neuroplasticity mechanismsNeuroinflammation and Neurodegeneration MechanismsMultiple Sclerosis Research Studies

Fractalkine-Dependent Microglial Pruning of Viable Oligodendrocyte Progenitor Cells Regulates Myelination

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Nemes-Baran, Ashley D., White, Donovan R., DeSilva, Tara M.·2020·Cell Reports

Abstract

Oligodendrogenesis occurs during early postnatal development, coincident with neurogenesis and synaptogenesis, raising the possibility that microglia-dependent pruning mechanisms that modulate neurons regulate myelin sheath formation. Here we show a population of ameboid microglia migrating from the ventricular zone into the corpus callosum during early postnatal development, termed "the fountain of microglia," phagocytosing viable oligodendrocyte progenitor cells (OPCs) before onset of myelination. Fractalkine receptor-deficient mice exhibit a reduction in microglial engulfment of viable OPCs, increased numbers of oligodendrocytes, and reduced myelin thickness but no change in axon number. These data provide evidence that microglia phagocytose OPCs as a homeostatic mechanism for proper myelination. A hallmark of hypomyelinating developmental disorders such as periventricular leukomalacia and of adult demyelinating diseases such as multiple sclerosis is increased numbers of oligodendrocytes but failure to myelinate, suggesting that microglial pruning of OPCs may be impaired in pathological states and hinder myelination.

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Crossref · 10.1016/j.celrep.2020.108047

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  • Microglial phagocytosis of OPCs and oligodendrocytes during early postnatal development in white matter limits the number of oligodendrocytes and myelin sheaths formed.

    “In fact, microglial phagocytosis of OPCs and oligodendrocytes during early postnatal development in white matter limits the number of oligodendrocytes and myelin sheaths formed (Nemes‐Baran et al. 2020).”

    From Depletion of Microglia Increases Cortical Oligodendrocyte Density During Remyelination (2026) · cites this paper as Nemes‐Baran et al. 2020

    The Results and Discussion (page not available) show that microglia engulf OPCs in the early postnatal corpus callosum and that reduced engulfment increases the number of mature oligodendrocytes. The claim overextends this to phagocytosis of oligodendrocytes as a separate population and to limiting the number of myelin sheaths formed: the paper reports no change in the number of myelinated axons when engulfment is reduced, but thinner myelin. (LLM, conf=0.90)

    Experimental — accuracy not yet measured
  • Fractalkine-dependent microglial pruning of OPCs is indispensable for proper myelination.

    “Besides, fractalkine-dependent microglial pruning of OPCs is indispensable for proper myelination.”

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Authors
Nemes-Baran, A. D., White, D. R., & DeSilva, T. M.
Affiliations
Cleveland Clinic (US)
Corresponding author
DeSilva, Tara M.
Venue
Cell Reports
Publisher
Elsevier BV
Published
2020-08
Volume
32
Issue
7
Pages
108047
ISSN
2211-1247 (ISSN-L)
OpenAlex
W3070828650
Cited by
196
References
70
Citations by year
2026: 31 · 2025: 39 · 2024: 33 · 2023: 35 · 2022: 32 · 2021: 24 · 2020: 2
FWCI
9.16
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion, cc-by-nc-nd)
Funders
  • National Science Foundation
  • National Institutes of Health
  • National Multiple Sclerosis Society
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Multiple Sclerosis Research Studies
Keywords
fractalkine, microglia, oligodendrocyte precursor cells, myelination, oligodendrogenesis, microglial phagocytosis, ameboid microglia, corpus callosum, postnatal development, periventricular leukomalacia, multiple sclerosis, demyelination, myelin thickness
MeSH terms
Oligodendrocyte Precursor Cells, Animals, Cell Differentiation, Male, Myelin Sheath, Stem Cells, Microglia, Mice

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