Cited by 123Neuroinflammation and Neurodegeneration MechanismsAlzheimer's disease research and treatmentsNeurological Disease Mechanisms and Treatments

Homeostatic Microglia Initially Seed and Activated Microglia Later Reshape Amyloid Plaques in Alzheimer's Disease

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Baligács, Nóra, Albertini, Giulia, Borrie, Sarah C., Serneels, Lutgarde, Pridans, Clare, Balusu, Sriram, De Strooper, Bart·2024·Nature Communications

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Abstract

The role of microglia in the amyloid cascade of Alzheimer’s disease (AD) is debated due to conflicting findings. Using a genetic and a pharmacological approach we demonstrate that depletion of microglia before amyloid-β (Aβ) plaque deposition, leads to a reduction in plaque numbers and neuritic dystrophy, confirming their role in plaque initiation. Transplanting human microglia restores Aβ plaque formation. While microglia depletion reduces insoluble Aβ levels, soluble Aβ concentrations stay consistent, challenging the view that microglia clear Aβ. In later stages, microglial depletion decreases plaque compaction and increases neuritic dystrophy, suggesting a protective role. Human microglia with the TREM2 R47H/R47H mutation exacerbate plaque pathology, emphasizing the importance of non-reactive microglia in the initiation of the amyloid cascade. Adaptive immune depletion ( Rag2 -/- ) does not affect microglia’s impact on plaque formation. These findings clarify conflicting reports, identifying microglia as key drivers of amyloid pathology, and raise questions about optimal therapeutic strategies for AD.

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Crossref · 10.1038/s41467-024-54779-w

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  • X34 strongly binds β-sheeted amyloid, labelling both dense plaque cores and surrounding amyloid deposits, with lower intensity in the latter.

    “Plaques were characterized using X34, a dye that strongly binds β‐sheeted amyloid, labelling both dense plaque cores and surrounding amyloid deposits, albeit with lower intensity in the latter”

    From Alzheimer's Protection by <scp>PLCγ2</scp> Compacts Plaques, Redistributes Microglia, and Protects Synapses in <scp> <i>App</i> <sup> <i>NL</i> </sup> </scp> <sup> <i>‐G‐F</i> </sup> Mice (2026) · cites this paper as Baligács et al. 2024

    The Methods (Immunofluorescence and Imaging; page unavailable) describe X34 as a fluorescent beta-sheet-specific amyloid dye, and the Fig. 2 caption identifies X34 staining of fibrillar plaques. The paper does not state that X34 labels surrounding amyloid deposits at lower intensity than dense cores; it instead identifies 82E1 as staining diffuse Aβ aggregates. (LLM, conf=0.85)

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Research works printed but not linked: 1

  1. [20]Mancuso, R. et al. Xenografted human microglia display diverse transcriptomic states in response to Alzheimer’s disease-related amyloid-β pathology. Nat. Neurosci. 27, 886–900 (2024). 38539015 PMC11089003 · DOI · Paper page

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Authors
Baligács, N., Albertini, G., Borrie, S. C., Serneels, L., Pridans, C., Balusu, S., & De Strooper, B.
Affiliations
  • Vlaams Instituut voor Biotechnologie (BE)
  • Centre for Inflammation Research (GB)
Venue
Nature Communications
Published
2024-12-05
Volume
15
Issue
1
Pages
10634-10634
ISSN
2041-1723 (ISSN-L)
OpenAlex
W4405035908
Cited by
123
References
76
Citations by year
2026: 66 · 2025: 57
FWCI
19.19
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion, cc-by)
  • Lirias (KU Leuven) (submittedVersion, cc-by)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, other-oa)
Funders
  • Alzheimer's Association
  • Queen Elisabeth Medical Foundation
  • European Commission (HORIZON2020, ERC-834682 CELLPHASE_AD, 834682)
  • Fonds Wetenschappelijk Onderzoek (11PSA24N)
  • KU Leuven
  • Vlaams Instituut voor Biotechnologie
  • Vlaamse regering
  • Fondation pour la Recherche sur Alzheimer
  • Fondation Médicale Reine Elisabeth
  • Medical Research Council (MR/Y014847/1)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
Keywords
microglia, Alzheimer's disease, amyloid plaques, neuritic dystrophy, microglial depletion, amyloid clearance, Rag2 knockout mice, amyloid hypothesis
MeSH terms
Alzheimer Disease, Animals, Disease Models, Animal, Female, Homeostasis, Humans, Male, Membrane Glycoproteins, Mice, Inbred C57BL, Mice, Transgenic, Mutation, Receptors, Immunologic, Amyloid beta-Peptides, Microglia, Mice, Plaque, Amyloid

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