Cited by 90Neuroinflammation and Neurodegeneration MechanismsMultiple Sclerosis Research StudiesNeurogenesis and neuroplasticity mechanisms

White matter microglia heterogeneity in the CNS

Open access
Amor, Sandra, McNamara, Niamh B., Gerrits, Emma, Marzin, Manuel C., Kooistra, Susanne M., Miron, Veronique E., Nutma, Erik·2022·Acta Neuropathologica

Abstract

Microglia, the resident myeloid cells in the central nervous system (CNS) play critical roles in shaping the brain during development, responding to invading pathogens, and clearing tissue debris or aberrant protein aggregations during ageing and neurodegeneration. The original concept that like macrophages, microglia are either damaging (pro-inflammatory) or regenerative (anti-inflammatory) has been updated to a kaleidoscope view of microglia phenotypes reflecting their wide-ranging roles in maintaining homeostasis in the CNS and, their contribution to CNS diseases, as well as aiding repair. The use of new technologies including single cell/nucleus RNA sequencing has led to the identification of many novel microglia states, allowing for a better understanding of their complexity and distinguishing regional variations in the CNS. This has also revealed differences between species and diseases, and between microglia and other myeloid cells in the CNS. However, most of the data on microglia heterogeneity have been generated on cells isolated from the cortex or whole brain, whereas white matter changes and differences between white and grey matter have been relatively understudied. Considering the importance of microglia in regulating white matter health, we provide a brief update on the current knowledge of microglia heterogeneity in the white matter, how microglia are important for the development of the CNS, and how microglial ageing affects CNS white matter homeostasis. We discuss how microglia are intricately linked to the classical white matter diseases such as multiple sclerosis and genetic white matter diseases, and their putative roles in neurodegenerative diseases in which white matter is also affected. Understanding the wide variety of microglial functions in the white matter may provide the basis for microglial targeted therapies for CNS diseases.

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Crossref · 10.1007/s00401-021-02389-x

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162 of 162 references verified0 citation errors · 0 not checkable

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  • The microglia population is highly heterogeneous, comprised of cells in discrete transcriptional dynamic substates that appear in defined contexts and brain regions.

    “Indeed, the microglia population is highly heterogeneous, comprised of cells in discrete transcriptional dynamic “substates” that appear in defined contexts and brain regions [333,334,335,336].”

    From Revisiting the Pathogenesis of X-Linked Adrenoleukodystrophy (2025) · cites this paper as [334]

  • Microglia are different in the brain and spinal cord.

    “Microglia are different in the brain and spinal cord [334].”

    From Revisiting the Pathogenesis of X-Linked Adrenoleukodystrophy (2025) · cites this paper as [334]

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Authors
Amor, S., McNamara, N. B., Gerrits, E., Marzin, M. C., Kooistra, S. M., Miron, V. E., & Nutma, E.
Affiliations
  • Queen Mary University of London (GB)
  • MRC Centre for Reproductive Health (GB)
  • University Medical Center Groningen (NL)
  • Amsterdam UMC Location Vrije Universiteit Amsterdam (NL)
Corresponding author
Nutma, Erik
Venue
Acta Neuropathologica
Published
2021-12-08
Volume
143
Issue
2
Pages
125-141
ISSN
  • 0001-6322 (ISSN-L)
  • 1432-0533
OpenAlex
W4200545840
Cited by
89
References
162
Citations by year
2026: 14 · 2025: 12 · 2024: 20 · 2023: 21 · 2022: 20 · 2021: 2
FWCI
1.86
Type
journal article
Language
en
Open access
Locations
  • Acta Neuropathologica (publishedVersion)
  • PubMed (publishedVersion)
  • Pure Amsterdam UMC (publishedVersion, other-oa)
  • Amsterdam UMC (VU Amsterdam) - Institutional Repository (publishedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion, other-oa)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
Funders
  • Action Medical Research
  • Medical Research Council (MR/M020827/1, MR/V031260/1)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Multiple Sclerosis Research Studies
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
white matter, microglial phenotype, central nervous system development, multiple sclerosis, neurodegenerative diseases, single-cell RNA sequencing, myeloid cells
MeSH terms
Animals, Central Nervous System Diseases, Humans, Microglia, White Matter

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