Cited by 97interferon and immune responsesNeuroinflammation and Neurodegeneration MechanismsParkinson's Disease Mechanisms and Treatments

Constitutively active STING causes neuroinflammation and degeneration of dopaminergic neurons in mice

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Szego, Eva M, Malz, Laura, Bernhardt, Nadine, Rösen-Wolff, Angela, Falkenburger, Björn H, Luksch, Hella·2022·eLife

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Abstract

Stimulator of interferon genes (STING) is activated after detection of cytoplasmic dsDNA by cGAS (cyclic GMP-AMP synthase) as part of the innate immunity defence against viral pathogens. STING binds TANK-binding kinase 1 (TBK1). TBK1 mutations are associated with familial amyotrophic lateral sclerosis, and the STING pathway has been implicated in the pathogenesis of further neurodegenerative diseases. To test whether STING activation is sufficient to induce neurodegeneration, we analysed a mouse model that expresses the constitutively active STING variant N153S. In this model, we focused on dopaminergic neurons, which are particularly sensitive to stress and represent a circumscribed population that can be precisely quantified. In adult mice expressing N153S STING, the number of dopaminergic neurons was smaller than in controls, as was the density of dopaminergic axon terminals and the concentration of dopamine in the striatum. We also observed alpha-synuclein pathology and a lower density of synaptic puncta. Neuroinflammation was quantified by staining astroglia and microglia, by measuring mRNAs, proteins and nuclear translocation of transcription factors. These neuroinflammatory markers were already elevated in juvenile mice although at this age the number of dopaminergic neurons was still unaffected, thus preceding the degeneration of dopaminergic neurons. More neuroinflammatory markers were blunted in mice deficient for inflammasomes than in mice deficient for signalling by type I interferons. Neurodegeneration, however, was blunted in both mice. Collectively, these findings demonstrate that chronic activation of the STING pathway is sufficient to cause degeneration of dopaminergic neurons. Targeting the STING pathway could therefore be beneficial in Parkinson’s disease and further neurodegenerative diseases.

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  • Mice carrying STING N153S, a constitutively active STING, was sufficient to induce α-synuclein aggregation and degeneration of dopaminergic neurons.

    “In addition, an important study published recently found that mice carrying STING N153S, a constitutively active STING, was sufficient to induce α-synuclein aggregation and degeneration of dopaminergic neurons.410”

    From Role of neuroinflammation in neurodegeneration development (2023) · cites this paper as [410]

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Authors
Szego, E. M., Malz, L., Bernhardt, N., Rösen-Wolff, A., Falkenburger, B. H., & Luksch, H.
Affiliations
  • Department of Neurology, TU Dresden
  • Technische Universität Dresden (DE)
  • Department of Pediatrics, TU Dresden
  • German Center for Neurodegenerative Diseases (DE)
Corresponding author
  • Malz, Laura
  • Bernhardt, Nadine
  • Falkenburger, Björn H
  • Luksch, Hella
Venue
eLife
Published
2022-10-31
Volume
11
ISSN
2050-084X (ISSN-L)
OpenAlex
W4307777491
Cited by
94
References
99
Citations by year
2026: 21 · 2025: 25 · 2024: 29 · 2023: 18 · 2022: 1
FWCI
7.16
Type
journal article
Language
en
Open access
Locations
  • eLife (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • DZNE Pub (submittedVersion, cc-by)
  • DZNE Pub (submittedVersion)
  • Qucosa (Saxon State and University Library Dresden) (submittedVersion, cc-by)
Funders
Deutsche Forschungsgemeinschaft (FA-658-3-1, SFB TRR237, B18)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › interferon and immune responses
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
Keywords
STING, dopaminergic neurons, neurodegeneration, neuroinflammation, Parkinson's disease, alpha-synuclein, inflammasome, type I interferon, cGAS, TBK1, innate immunity, striatum, dopamine, neurodegenerative diseases
MeSH terms
Neuroinflammatory Diseases, STING Protein, Animals, Parkinson Disease, Microglia, Neurodegenerative Diseases, Mice, Dopaminergic Neurons

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