Cited by 44Prion Diseases and Protein MisfoldingNeuroinflammation and Neurodegeneration MechanismsAlzheimer's disease research and treatments

Microglia deficiency accelerates prion disease but does not enhance prion accumulation in the brain

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Bradford, Barry M., McGuire, Lynne I., Hume, David A., Pridans, Clare, Mabbott, Neil A.·2022·Glia

Published version of a preprint

Abstract

Prion diseases are transmissible, neurodegenerative disorders associated with misfolding of the prion protein. Previous studies show that reduction of microglia accelerates central nervous system (CNS) prion disease and increases the accumulation of prions in the brain, suggesting that microglia provide neuroprotection by phagocytosing and destroying prions. In Csf1r ΔFIRE mice, the deletion of an enhancer within Csf1r specifically blocks microglia development, however, their brains develop normally and show none of the deficits reported in other microglia‐deficient models. Csf1r ΔFIRE mice were used as a refined model in which to study the impact of microglia‐deficiency on CNS prion disease. Although Csf1r ΔFIRE mice succumbed to CNS prion disease much earlier than wild‐type mice, the accumulation of prions in their brains was reduced. Instead, astrocytes displayed earlier, non‐polarized reactive activation with enhanced phagocytosis of neuronal contents and unfolded protein responses. Our data suggest that rather than simply phagocytosing and destroying prions, the microglia instead provide host‐protection during CNS prion disease and restrict the harmful activities of reactive astrocytes.

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  • Complete depletion of brain microglia in mice results in an accelerated disease course but does not show enhanced accumulation of PrPSc.

    “Novel data on the complete depletion of brain microglia have shown that mice displayed an accelerated disease course, but did not show an enhanced accumulation of PrPSc [53].”

    From Loss of Homeostatic Microglia Signature in Prion Diseases (2022) · cites this paper as [53]

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Authors
Bradford, B. M., McGuire, L. I., Hume, D. A., Pridans, C., & Mabbott, N. A.
Affiliations
  • Roslin Institute (GB)
  • Translational Research Institute (AU)
  • Centre for Inflammation Research (GB)
Corresponding author
  • Bradford, Barry M.
  • Mabbott, Neil A.
Venue
Glia
Publisher
Wiley
Published
2022-07-19
Volume
70
Issue
11
Pages
2169-2187
ISSN
  • 0894-1491 (ISSN-L)
  • 1098-1136
OpenAlex
W4285794295
Cited by
44
References
64
Citations by year
2026: 7 · 2025: 12 · 2024: 11 · 2023: 6 · 2022: 7 · 2021: 1
FWCI
2.94
Type
journal article
Language
en
Open access
Locations
  • Glia (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, other-oa)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, cc-by)
Funders
Biotechnology and Biological Sciences Research Council (BBS/E/D/10002071, BBS/E/D/20002173, BB/S005471/1)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Prion Diseases and Protein Misfolding
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
prion disease, prion accumulation, astrocyte activation, phagocytosis, unfolded protein response, neuroprotection
MeSH terms
Animals, Astrocytes, Brain, Prions, Prion Diseases, Microglia, Mice

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