Cited by 698Multiple Sclerosis Research StudiesNeuroinflammation and Neurodegeneration MechanismsInflammasome and immune disorders

The DOI matches its Crossref record; 67 of the 68 references it cites were found in a registry or an index.

Loss of ‘homeostatic’ microglia and patterns of their activation in active multiple sclerosis

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Abstract

Microglia and macrophages accumulate at the sites of active demyelination and neurodegeneration in the multiple sclerosis brain and are thought to play a central role in the disease process. We used recently described markers to characterize the origin and functional states of microglia/macrophages in acute, relapsing and progressive multiple sclerosis. We found microglia activation in normal white matter of controls and that the degree of activation increased with age. This microglia activation was more pronounced in the normal-appearing white matter of patients in comparison to controls and increased with disease duration. In contrast to controls, the normal-appearing white matter of patients with multiple sclerosis showed a significant reduction of P2RY12, a marker expressed in homeostatic microglia in rodents, which was completely lost in active and slowly expanding lesions. Early stages of demyelination and neurodegeneration in active lesions contained microglia with a pro-inflammatory phenotype, which expressed molecules involved in phagocytosis, oxidative injury, antigen presentation and T cell co-stimulation. In later stages, the microglia and macrophages in active lesions changed to a phenotype that was intermediate between pro- and anti-inflammatory activation. In inactive lesions, the density of microglia/macrophages was significantly reduced and microglia in part converted to a P2RY12+ phenotype. Analysis of TMEM119, which is expressed on microglia but not on recruited macrophages, demonstrated that on average 45% of the macrophage-like cells in active lesions were derived from the resident microglia pool. Our study demonstrates the loss of the homeostatic microglial signature in active multiple sclerosis with restoration associated with disease inactivity.

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Crossref · 10.1093/brain/awx113

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Research works printed but not linked: 2

  1. Babinski, 1885, Recherches sur l’anatomie pathologique de la sclerose en plaque et étude comparative des diverses variétés de la scleroses de la moelle, Arch Physiol, 5, 186
  2. Marburg, 1906, Die sogenannte akute multiple Sklerose, J Psychiatric Neurol, 27, 1

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Items 101–200 of 698

Metadata

Authors
Zrzavy, T., Hametner, S., Wimmer, I., Butovsky, O., Weiner, H. L., & Lassmann, H.
Affiliations
  • Medical University of Vienna (AT)
  • Brigham and Women's Hospital (US)
Corresponding author
Lassmann, Hans
Venue
Brain
Published
2017-05-24
Volume
140
Issue
7
Pages
1900-1913
ISSN
  • 0006-8950 (ISSN-L)
  • 1460-2156
OpenAlex
W2620266814
Cited by
684
References
68
Citations by year
2026: 62 · 2025: 65 · 2024: 78 · 2023: 87 · 2022: 92 · 2021: 116 · 2020: 71 · 2019: 60 · 2018: 43 · 2017: 10
FWCI
39.52
Type
journal article
Language
en
Open access
Locations
  • Brain (publishedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
Funders
  • NIH (R01NS088137)
  • National Multiple Sclerosis Society (5092A1)
Topics
  • Health Sciences › Medicine › Clinical Neurology › Multiple Sclerosis Research Studies
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
Keywords
multiple sclerosis, microglia, macrophages, homeostatic microglia, microglial activation, P2Y12 receptor, TMEM119, normal-appearing white matter, demyelination, neurodegeneration, lesion activity, disease duration, pro-inflammatory phenotype, anti-inflammatory phenotype, phagocytosis, oxidative damage, antigen presentation, T cell costimulation, microglial origin
MeSH terms
Adult, Aged, Aged, 80 and over, Aging, Demyelinating Diseases, Female, Homeostasis, Humans, Macrophage Activation, Male, Membrane Proteins, Middle Aged, Multiple Sclerosis, Nerve Degeneration, Case-Control Studies, Microglia, Receptors, Purinergic P2Y12, White Matter

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