Cited by 695Neuroinflammation and Neurodegeneration MechanismsAlzheimer's disease research and treatmentsNeurological Disease Mechanisms and Treatments

The DOI matches its Crossref record; 88 of the 88 references it cites were found in a registry or an index.

Eliminating microglia in Alzheimer’s mice prevents neuronal loss without modulating amyloid-β pathology

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Abstract

In addition to amyloid-β plaque and tau neurofibrillary tangle deposition, neuroinflammation is considered a key feature of Alzheimer’s disease pathology. Inflammation in Alzheimer's disease is characterized by the presence of reactive astrocytes and activated microglia surrounding amyloid plaques, implicating their role in disease pathogenesis. Microglia in the healthy adult mouse depend on colony-stimulating factor 1 receptor (CSF1R) signalling for survival, and pharmacological inhibition of this receptor results in rapid elimination of nearly all of the microglia in the central nervous system. In this study, we set out to determine if chronically activated microglia in the Alzheimer's disease brain are also dependent on CSF1R signalling, and if so, how these cells contribute to disease pathogenesis. Ten-month-old 5xfAD mice were treated with a selective CSF1R inhibitor for 1 month, resulting in the elimination of ∼80% of microglia. Chronic microglial elimination does not alter amyloid-β levels or plaque load; however, it does rescue dendritic spine loss and prevent neuronal loss in 5xfAD mice, as well as reduce overall neuroinflammation. Importantly, behavioural testing revealed improvements in contextual memory. Collectively, these results demonstrate that microglia contribute to neuronal loss, as well as memory impairments in 5xfAD mice, but do not mediate or protect from amyloid pathology. Microglia-mediated inflammation is a driving force in Alzheimer’s disease pathogenesis. Spangenberg et al . show that elimination of microglia in 5xfAD mice improves cognitive function and ameliorates synaptic/neuronal loss without altering amyloid-β levels or plaque load. Thus, microglia act downstream of plaques to mediate damage to the brain.

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Crossref · 10.1093/brain/aww016

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Metadata

Authors
Spangenberg, E. E., Lee, R. J., Najafi, A. R., Rice, R. A., Elmore, M. R. P., Blurton-Jones, M., West, B. L., & Green, K. N.
Affiliations
  • University of California, Irvine (US)
  • Plexxikon (United States) (US)
Venue
Brain
Published
2016-02-26
Volume
139
Issue
4
Pages
1265-1281
ISSN
  • 0006-8950 (ISSN-L)
  • 1460-2156
OpenAlex
W2281702574
Cited by
695
References
88
Citations by year
2026: 44 · 2025: 63 · 2024: 66 · 2023: 79 · 2022: 80 · 2021: 90 · 2020: 80 · 2019: 62 · 2018: 66 · 2017: 48 · 2016: 16
FWCI
31.14
Type
journal article
Language
en
Open access
Locations
  • Brain (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • HighWire Press Open Archive (submittedVersion)
Funders
  • Alzheimer's Association
  • Glenn Foundation for Medical Research
  • Plexxikon
  • National Institutes of Health (UL1TR001414, AG00096, AG00538)
  • National Institute on Aging (AG00096, AG 00538, P50AG016573, T32AG000096)
  • National Institute of Neurological Disorders and Stroke (F31NS086409, R01NS083801)
  • National Center for Advancing Translational Sciences
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
Keywords
microglia, Alzheimer's disease, CSF1R inhibition, neuroinflammation, amyloid plaques, neuronal loss, dendritic spine loss, 5xFAD mice, contextual memory, synaptic loss
MeSH terms
Alzheimer Disease, Animals, Brain, Female, Male, Mice, Inbred C57BL, Mice, Transgenic, Neurons, Amyloid beta-Peptides, Microglia, Mice, Mice, 129 Strain, Plaque, Amyloid

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