Cited by 88Neuroinflammation and Neurodegeneration MechanismsPrion Diseases and Protein MisfoldingNeurological Disease Mechanisms and Treatments

Defining the Microglia Response during the Time Course of Chronic Neurodegeneration

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Vincenti, James E., Murphy, Lita, Grabert, Kathleen, McColl, Barry W., Cancellotti, Enrico, Freeman, Tom C., Manson, Jean C.·2016·Journal of Virology

Abstract

Inflammation has been proposed as a major component of neurodegenerative diseases, although the precise role it plays has yet to be defined. We examined the role of key contributors to this inflammatory process, microglia, the major resident immune cell population of the brain, in a prion disease model of chronic neurodegeneration. Initially, we performed an extensive reanalysis of a large study of prion disease, where the transcriptome of mouse brains had been monitored throughout the time course of disease. Our analysis has provided a detailed classification of the disease-associated genes based on cell type of origin and gene function. This revealed that the genes upregulated during disease, regardless of the strain of mouse or prion protein, are expressed predominantly by activated microglia. In order to study the microglia contribution more specifically, we established a mouse model of prion disease in which the 79A murine prion strain was introduced by an intraperitoneal route into BALB/cJFms-EGFP/−mice, which express enhanced green fluorescent protein under the control of the c-fms operon. Samples were taken at time points during disease progression, and histological analysis of the brain and transcriptional analysis of isolated microglia was carried out. The analysis of isolated microglia revealed a disease-specific, highly proinflammatory signature in addition to an upregulation of genes associated with metabolism and respiratory stress. This study strongly supports the growing recognition of the importance of microglia within the prion disease process and identifies the nature of the response through gene expression analysis of isolated microglia. IMPORTANCE Inflammation has been proposed as a major component of neurodegenerative diseases. We have examined the role of key contributors to this inflammatory process, microglia, the major resident immune cell population of the brain, in a murine prion disease model of chronic neurodegeneration. Our study demonstrates that genes upregulated throughout the disease process are expressed predominantly by microglia. A disease-specific, highly proinflammatory signature was observed in addition to an upregulation of genes associated with metabolism and respiratory stress. This study strongly supports the growing recognition of the important contribution of microglia to a chronic neurodegenerative disease process.

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  • Several proinflammatory cytokines, including TNF α, IL 1α, and C1qa, are upregulated in the brain during the prion disease course.

    “Several proinflammatory cytokines are upregulated in the brain during the prion disease course including TNF α, IL 1α, and C1qa [46,69,70,71,72,73].”

    From Loss of Homeostatic Microglia Signature in Prion Diseases (2022) · cites this paper as [71]

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Authors
Vincenti, J. E., Murphy, L., Grabert, K., McColl, B. W., Cancellotti, E., Freeman, T. C., & Manson, J. C.
Affiliations
Roslin Institute (GB)
Corresponding author
Manson, Jean C.
Venue
Journal of Virology
Published
2016-03-15
Volume
90
Issue
6
Pages
3003-3017
ISSN
  • 0022-538X (ISSN-L)
  • 1098-5514
OpenAlex
W2202503777
Cited by
88
References
100
Citations by year
2026: 2 · 2025: 7 · 2024: 4 · 2023: 2 · 2022: 10 · 2021: 12 · 2020: 14 · 2019: 16 · 2018: 10 · 2017: 6 · 2016: 5
FWCI
3.74
Type
journal article
Language
en
Open access
Locations
  • Journal of Virology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, cc-by)
Funders
Biotechnology and Biological Sciences Research Council (BB/F01693X/1)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Prion Diseases and Protein Misfolding
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
Keywords
microglia, prion disease, neuroinflammation, chronic neurodegeneration, microglial activation, gene expression profiling, transcriptome, microglia isolation, metabolic stress, respiratory stress, prion protein
MeSH terms
Animals, Brain, Chronic Disease, Disease Models, Animal, Female, Immunohistochemistry, Inflammation, Male, Mice, Inbred BALB C, Microscopy, Prion Diseases, Microglia, Neurodegenerative Diseases, Gene Expression Profiling

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