Cited by 83Parkinson's Disease Mechanisms and TreatmentsNeuroinflammation and Neurodegeneration MechanismsMultiple Sclerosis Research Studies

Oligodendroglial α‐synucleinopathy‐driven neuroinflammation in multiple system atrophy

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Hoffmann, Alana, Ettle, Benjamin, Battis, Kristina, Reiprich, Simone, Schlachetzki, Johannes C. M., Masliah, Eliezer, Wegner, Michael, Kuhlmann, Tanja +2 more·2019·Brain Pathology

Abstract

Neuroinflammation and oligodendroglial cytoplasmic α‐synuclein (α‐syn) inclusions (GCIs) are important neuropathological characteristics of multiple system atrophy (MSA). GCIs are known to interfere with oligodendroglial maturation and consequently result in myelin loss. The neuroinflammatory phenotype in the context of MSA, however, remains poorly understood. Here, we demonstrate MSA‐associated neuroinflammation being restricted to myeloid cells and tightly linked to oligodendroglial α‐syncleinopathy. In human putaminal post‐mortem tissue of MSA patients, neuroinflammation was observed in white matter regions only. This locally restricted neuroinflammation coincided with elevated numbers of α‐syn inclusions, while gray matter with less α‐synucleinopathy remained unaffected. In order to analyze the temporal pattern of neuroinflammation, a transgenic mouse model overexpressing human α‐syn under the control of an oligodendrocyte‐specific myelin basic protein (MBP) promoter (MBP29‐hα‐syn mice) was assessed in a pre‐symptomatic and symptomatic disease stage. Strikingly, we detected an increased neuroinflammation in regions with a high α‐syn load, the corpus callosum and the striatum, of MBP29‐hα‐syn mice, already at a pre‐symptomatic stage. Furthermore, this inflammatory response was restricted to myeloid cells being highly proliferative and showing an activated, phagocytic phenotype. In contrast, severe astrogliosis was observed only in gray matter regions of MSA patients as well as MBP29‐hα‐syn mice. To further characterize the influence of oligodendrocytes on initiation of the myeloid immune response, we performed RNA sequencing analysis of α‐syn overexpressing primary oligodendrocytes. A distinct gene expression profile including upregulation of cytokines important for myeloid cell attraction and proliferation was detected in α‐syn overexpressing oligodendrocytes. Additionally, microdissected tissue of MBP29‐hα‐syn mice exhibited a similar cellular gene expression profile in white matter regions even pre‐symptomatically. Collectively, these results imply an early crosstalk between neuroinflammation and oligodendrocytes containing α‐syn inclusions leading to an immune response locally restricted to white matter regions in MSA.

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Authors
Hoffmann, A., Ettle, B., Battis, K., Reiprich, S., Schlachetzki, J. C. M., Masliah, E., Wegner, M., Kuhlmann, T., Riemenschneider, M. J., & Winkler, J.
Affiliations
  • Friedrich-Alexander-Universität Erlangen-Nürnberg (DE)
  • National Institutes of Health (US)
  • University Hospital Münster (DE)
  • University Hospital Regensburg (DE)
Corresponding author
Winkler, Jürgen
Venue
Brain Pathology
Publisher
Wiley
Published
2019-01-31
Volume
29
Issue
3
Pages
380-396
ISSN
  • 1015-6305 (ISSN-L)
  • 1750-3639
OpenAlex
W2901746027
Cited by
83
References
93
Citations by year
2026: 8 · 2025: 4 · 2024: 21 · 2023: 15 · 2022: 11 · 2021: 9 · 2020: 12 · 2019: 3
FWCI
4.07
Type
journal article
Language
en
Open access
Locations
  • Brain Pathology (publishedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • University of Regensburg Publication Server (University of Regensburg) (submittedVersion)
Funders
Deutsche Forschungsgemeinschaft (SCHL 21021‐1, INST 410/45‐1 FUGG, DFG GRK2162)
Topics
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Multiple Sclerosis Research Studies
Keywords
multiple system atrophy, neuroinflammation, alpha-synuclein, glial cytoplasmic inclusions, myeloid cells, oligodendrocytes, demyelination, astrocyte activation, white matter, transgenic mouse model, myelin basic protein promoter, cytokines, corpus callosum, striatum
MeSH terms
Synucleinopathies, Aged, Animals, Brain, Inclusion Bodies, Corpus Striatum, Disease Models, Animal, Female, Humans, Male, Mice, Transgenic, Middle Aged, Neurons, Oligodendroglia, Neuroimmunomodulation, Multiple System Atrophy, Myeloid Cells, Mice, alpha-Synuclein, White Matter

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