Mitochondrial DNA damage triggers spread of Parkinson’s disease-like pathology
Open accessAbstract
In the field of neurodegenerative diseases, especially sporadic Parkinson’s disease (sPD) with dementia (sPDD), the question of how the disease starts and spreads in the brain remains central. While prion-like proteins have been designated as a culprit, recent studies suggest the involvement of additional factors. We found that oxidative stress, damaged DNA binding, cytosolic DNA sensing, and Toll-Like Receptor (TLR)4/9 activation pathways are strongly associated with the sPDD transcriptome, which has dysregulated type I Interferon (IFN) signaling. In sPD patients, we confirmed deletions of mitochondrial (mt)DNA in the medial frontal gyrus, suggesting a potential role of damaged mtDNA in the disease pathophysiology. To explore its contribution to pathology, we used spontaneous models of sPDD caused by deletion of type I IFN signaling ( Ifnb –/– / Ifnar –/– mice). We found that the lack of neuronal IFNβ/IFNAR leads to oxidization, mutation, and deletion in mtDNA, which is subsequently released outside the neurons. Injecting damaged mtDNA into mouse brain induced PDD-like behavioral symptoms, including neuropsychiatric, motor, and cognitive impairments. Furthermore, it caused neurodegeneration in brain regions distant from the injection site, suggesting that damaged mtDNA triggers spread of PDD characteristics in an “infectious-like” manner. We also discovered that the mechanism through which damaged mtDNA causes pathology in healthy neurons is independent of Cyclic GMP-AMP synthase and IFNβ/IFNAR, but rather involves the dual activation of TLR9/4 pathways, resulting in increased oxidative stress and neuronal cell death, respectively. Our proteomic analysis of extracellular vesicles containing damaged mtDNA identified the TLR4 activator, Ribosomal Protein S3 as a key protein involved in recognizing and extruding damaged mtDNA. These findings might shed light on new molecular pathways through which damaged mtDNA initiates and spreads PD-like disease, potentially opening new avenues for therapeutic interventions or disease monitoring.
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Patients with clinical PD possess an increased accumulation of mtDNA mutations in blood cells.
“recent studies have shown that patients with clinical PD possess an increased accumulation of mtDNA mutations in blood cells (Qi et al. 2023; Tresse et al. 2023)”
From Mitochondrial DNA Damage in Substantia Nigra Pars Compacta Astrocytes Exacerbates Dopaminergic Neuron Loss in a 6-Hydroxydopamine Mouse Model of Parkinsonism (2026) · cites this paper as Tresse et al. 2023
The Discussion reports an increased presence of mtDNA mutations in patients with PD, and the Results describe mtDNA alterations in PD brain samples. Neither passage establishes that the mutations accumulate in blood cells; searches for blood cells and peripheral blood did not find that finding in our copy. (LLM, conf=0.87)
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RETRACTED ARTICLE: Parkin and PINK1 mitigate STING-induced inflammation
Sliter, D. A., Martinez, J., Hao, L., Chen, X., Sun, N., Fischer, T. D., Burman, J. L., Li, Y., Zhang, Z., Narendra, D. P., et al. (2018) · Nature · doi:10.1038/s41586-018-0448-9 · Cited by 1,287 · see citing works
RetractedXian, H., Watari, K., Sanchez-Lopez, E., Offenberger, J., Onyuru, J., Sampath, H., Ying, W., Hoffman, H. M., Shadel, G. S., & Karin, M. (2022) · Immunity · doi:10.1016/j.immuni.2022.06.007 · Cited by 850 · see citing works
Toll‐like receptor 4 is required for α‐synuclein dependent activation of microglia and astroglia
Fellner, L., Irschick, R., Schanda, K., Reindl, M., Klimaschewski, L., Poewe, W., Wenning, G. K., & Stefanova, N. (2013) · Glia · doi:10.1002/glia.22437 · Cited by 697 · see citing works
Progressive parkinsonism in mice with respiratory-chain-deficient dopamine neurons
Ekstrand, M. I., Terzioglu, M., Galter, D., Zhu, S., Hofstetter, C., Lindqvist, E., Thams, S., Bergstrand, A., Hansson, F. S., Trifunovic, A., et al. (2007) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0605208103 · Cited by 605 · cited 1× · see citing works
“Nevertheless, strong evidence from PD animal models supports the involvement of mitochondrial disturbances including mtDNA packaging [21].”
BackgroundCaielli, S., Athale, S., Domic, B., Murat, E., Chandra, M., Banchereau, R., Baisch, J., Phelps, K., Clayton, S., Gong, M., et al. (2016) · Journal of Experimental Medicine · doi:10.1084/jem.20151876 · Cited by 501 · see citing works
Role of TLR4 in the gut-brain axis in Parkinson's disease: A translational study from men to mice
Perez-Pardo, P., Dodiya, H. B., Engen, P. A., Forsyth, C. B., Huschens, A. M., Shaikh, M., Voigt, R. M., Naqib, A., Green, S. J., Kordower, J. H., et al. (2019) · Gut · doi:10.1136/gutjnl-2018-316844 · Cited by 467 · see citing works
Toll-like receptors and their therapeutic potential in Parkinson’s disease and α-synucleinopathies
Kouli, A., Horne, C. B., & Williams-Gray, C. H. (2019) · Brain Behavior and Immunity · doi:10.1016/j.bbi.2019.06.042 · Cited by 143 · see citing works
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Cited by
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Extracellular vesicles: New horizons in neurodegeneration
Chen, J., Tian, C., Xiong, X., Yang, Y., & Zhang, J. (2025) · eBioMedicine · doi:10.1016/j.ebiom.2025.105605 · Cited by 53 · see citing works
Ayala, D. A., Hall, G. M., Das, D., Tijerina, E., Villagran, L. L., Khan, Z., Paliwal, D., Anand, A., Rimer, M., & Srinivasan, R. (2026) · Cellular and Molecular Neurobiology · doi:10.1007/s10571-026-01713-x · Cited by 1 · see citing works
- Authors
- Tresse, E., Marturia-Navarro, J., Sew, W. Q. G., Cisquella-Serra, M., Jaberi, E., Riera-Ponsati, L., Fauerby, N., Hu, E., Kretz, O., Aznar, S., & Issazadeh-Navikas, S.
- Affiliations
- University of Copenhagen (DK)
- University Medical Center Hamburg-Eppendorf (DE)
- Copenhagen University Hospital (DK)
- ORCID
- Venue
- Molecular Psychiatry
- Published
- 2023-10-02
- Volume
- 28
- Issue
- 11
- Pages
- 4902-4914
- ISSN
- 1359-4184 (ISSN-L)
- 1476-5578
- PMC
- PMC10914608
- OpenAlex
- W4387235331
- Cited by
- 99
- References
- 7
- Citations by year
- 2026: 34 · 2025: 38 · 2024: 23 · 2023: 4
- FWCI
- 16.14
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Locations
- Molecular Psychiatry (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Research at the University of Copenhagen (University of Copenhagen) (publishedVersion, cc-by)
- Funders
- European Commission (703217, HORIZON2020)
- Lundbeckfonden (R359-2020-2658, R223‐2016‐849)
- Danmarks Frie Forskningsfond
- H. Lundbeck A/S
- Topics
- Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
- Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
- Life Sciences › Immunology and Microbiology › Immunology › interferon and immune responses
- Keywords
- Parkinson's disease dementia, mitochondrial DNA damage, mitochondrial DNA deletions, type I interferon signaling, cytosolic DNA sensing, oxidative stress, extracellular vesicles, ribosomal protein S3, neurodegeneration, mitochondrial DNA release
- MeSH terms
- Animals, DNA, Mitochondrial, Humans, Mitochondria, Neurons, Parkinson Disease, Proteomics, Mice
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