Cited by 24Neuroinflammation and Neurodegeneration MechanismsAlzheimer's disease research and treatmentsNeurological Disease Mechanisms and Treatments

Comparative analysis of transcriptome remodeling in plaque-associated and plaque-distant microglia during amyloid-β pathology progression in mice

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Hemonnot-Girard, Anne-Laure, Meersseman, Cédric, Pastore, Manuela, Garcia, Valentin, Linck, Nathalie, Rey, Catherine, Chebbi, Amine, Jeanneteau, Freddy +5 more·2022·Journal of Neuroinflammation

Abstract

Background: Research in recent years firmly established that microglial cells play an important role in the pathogenesis of Alzheimer's disease (AD). In parallel, a series of studies showed that, under both homeostatic and pathological conditions, microglia are a heterogeneous cell population. In AD, amyloid-β (Aβ) plaque-associated microglia (PAM) display a clearly distinct phenotype compared to plaque-distant microglia (PCM), suggesting that these two microglia subtypes likely differently contribute to disease progression. So far, molecular characterization of PAM was performed indirectly using single cell RNA sequencing (scRNA-seq) approaches or based on markers that are supposedly up-regulated in this microglia subpopulation. Methods: In this study based on a well-characterized AD mouse model, we combined cell-specific laser capture microdissection and RNA-seq analysis to i) identify, without preconceived notions of the molecular and/or functional changes that would affect these cells, the genes and gene networks that are dysregulated in PAM or PCM at three critical stages of the disease, and ii) to investigate the potential contribution of both plaque-associated and plaque-distant microglia. Results: First, we established that our approach allows selective isolation of microglia, while preserving spatial information and preventing transcriptome changes induced by classical purification approaches. Then, we identified, in PAM and PCM subpopulations, networks of co-deregulated genes and analyzed their potential functional roles in AD. Finally, we investigated the dynamics of microglia transcriptomic remodeling at early, intermediate and late stages of the disease and validated select findings in postmortem human AD brain. Conclusions: Our comprehensive study provides useful transcriptomic information regarding the respective contribution of PAM and PCM across the Aβ pathology progression. It highlights specific pathways that would require further study to decipher their roles across disease progression. It demonstrates that the proximity of microglia to Aβ-plaques dramatically alters the microglial transcriptome and reveals that these changes can have both positive and negative impacts on the surrounding cells. These opposing effects may be driven by local microglia heterogeneity also demonstrated by this study. Our approach leads to molecularly define the less well studied plaque-distant microglia. We show that plaque-distant microglia are not bystanders of the disease, although the transcriptomic changes are far less striking compared to what is observed in plaque-associated microglia. In particular, our results suggest they may be involved in Aβ oligomer detection and in Aβ-plaque initiation, with increased contribution as the disease progresses. Graphical Abstract:

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  • Spatial transcriptomics allows gene expression patterns to be mapped onto histologically defined regions, linking molecular signatures to specific pathological features such as amyloid plaques and tau tangles.

    “It allows gene expression patterns to be mapped onto histologically defined regions, thereby linking molecular signatures to specific pathological features such as amyloid plaques and tau tangles114,121,166,167.”

    From Artificial intelligence-driven multi-omics approaches in Alzheimer's disease: Progress, challenges, and future directions (2025) · cites this paper as [121]

    The Results describe linking microglial gene expression to amyloid plaques using laser capture microdissection, RNA-seq, and spatial validation by smFISH. The paper does not show gene-expression mapping to tau tangles; its reported spatial analysis concerns amyloid plaques. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Spatial transcriptomics enhances transcriptomic profiling by preserving the spatial context of gene expression.

    “Spatial transcriptomics further enhances transcriptomic profiling by preserving the spatial context of gene expression.”

    From Artificial intelligence-driven multi-omics approaches in Alzheimer's disease: Progress, challenges, and future directions (2025) · cites this paper as [121]

    The Results section ('Validation in mouse and human brain tissue'; page unavailable) says laser capture microdissection preserves spatial information, and the Discussion says combining it with RNA-seq enables transcriptome analysis of spatially distinct microglia. This supports the value of spatial context in profiling, but the paper describes its own method as LCM plus RNA-seq and refers to a separate spatial-transcriptomic study; it does not directly establish the claim about spatial transcriptomics as a method. (LLM, conf=0.82)

    Experimental — accuracy not yet measured

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1 of the 73 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. [46]Marsh SE, Kamath T, Walker AJ, Dissing-Olesen L, Hammond TR, Young AMH, et al. Single cell sequencing reveals glial specific responses to tissue processing & enzymatic dissociation in mice and humans. BioRxiv. 2020:2020.12.03.408542.

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Authors
Hemonnot-Girard, A.-L., Meersseman, C., Pastore, M., Garcia, V., Linck, N., Rey, C., Chebbi, A., Jeanneteau, F., Ginsberg, S. D., Lachuer, J., Reynes, C., Rassendren, F., & Hirbec, H.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Nathan Kline Institute for Psychiatric Research (US)
Corresponding author
Hirbec, Hélène
Venue
Journal of Neuroinflammation
Published
2022-09-24
Volume
19
Issue
1
Pages
234-234
ISSN
1742-2094 (ISSN-L)
OpenAlex
W4296982912
Cited by
24
References
73
Citations by year
2026: 5 · 2025: 6 · 2024: 5 · 2023: 6 · 2022: 1 · 2013: 1
FWCI
1.58
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroinflammation (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, cc-by)
  • HAL (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Labex ICST (ANR 11-LABX-0015)
  • FRM
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, plaque-associated microglia, amyloid plaques, Alzheimer's disease, transcriptome remodeling, microglial heterogeneity, disease progression, laser capture microdissection, mouse models of Alzheimer's disease, postmortem brain, neuroinflammation
MeSH terms
Alzheimer Disease, Animals, Disease Models, Animal, Humans, Mice, Transgenic, Amyloid beta-Peptides, Amyloid beta-Protein Precursor, Microglia, Disease Progression, Mice, Plaque, Amyloid, Transcriptome

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