Cited by 53Neuroinflammation and Neurodegeneration MechanismsParkinson's Disease Mechanisms and TreatmentsNuclear Receptors and Signaling

DJ-1 inhibits microglial activation and protects dopaminergic neurons in vitro and in vivo through interacting with microglial p65

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Lin, Zixuan, Chen, Chen, Yang, Dongqin, Ding, Jianqing, Wang, Guanghui, Ren, Haigang·2021·Cell Death & Disease

Abstract

Parkinson’s disease (PD), one of the most common neurodegenerative disorders, is characterized by progressive neurodegeneration of dopaminergic (DA) neurons in the substantia nigra pars compacta (SNpc). DJ-1 acts essential roles in neuronal protection and anti-neuroinflammatory response, and its loss of function is tightly associated with a familial recessive form of PD. However, the molecular mechanism of DJ-1 involved in neuroinflammation is largely unclear. Here, we found that wild-type DJ-1, rather than the pathogenic L166P mutant DJ-1, directly binds to the subunit p65 of nuclear factor-κB (NF-κB) in the cytoplasm, and loss of DJ-1 promotes p65 nuclear translocation by facilitating the dissociation between p65 and NF-κB inhibitor α (IκBα).DJ-1 knockout (DJ-1−/−) mice exhibit more microglial activation compared with wild-type littermate controls, especially in response to lipopolysaccharide (LPS) treatment. In cellular models, knockdown of DJ-1 significantly upregulates the gene expression and increases the release of LPS-treated inflammatory cytokines in primary microglia and BV2 cells. Furthermore,DJ-1 deficiency in microglia significantly enhances the neuronal toxicity in response to LPS stimulus. In addition, pharmacological blockage of NF-κB nuclear translocation by SN-50 prevents microglial activation and alleviates the damage of DA neurons induced by microglial DJ-1 deficiency in vivo and in vitro. Thus, our data illustrate a novel mechanism by which DJ-1 facilitates the interaction between IκBα and p65 by binding to p65 in microglia, and thus repressing microglial activation and exhibiting the protection of DA neurons from neuroinflammation-mediated injury in PD.

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Authors
Lin, Z., Chen, C., Yang, D., Ding, J., Wang, G., & Ren, H.
Affiliations
  • Soochow University (CN)
  • Shanghai Jiao Tong University (CN)
Corresponding author
  • Wang, Guanghui
  • Ren, Haigang
Venue
Cell Death & Disease
Published
2021-07-17
Volume
12
Issue
8
Pages
715-715
ISSN
2041-4889 (ISSN-L)
OpenAlex
W3186026575
Cited by
49
References
55
Citations by year
2026: 4 · 2025: 16 · 2024: 11 · 2023: 10 · 2022: 7 · 2021: 1
FWCI
3.30
Type
journal article
Language
en
Open access
Locations
  • Cell Death and Disease (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Natural Science Foundation of China (31970966, 32070970)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nuclear Receptors and Signaling
Keywords
DJ-1, Parkinson's disease, microglial activation, dopaminergic neurons, neuroinflammation, NF-κB p65, IκBα, microglia-neuron interaction, LPS-induced neuroinflammation, substantia nigra pars compacta, neuroprotection
MeSH terms
Protein Deglycase DJ-1, Animals, Cell Nucleus, Cells, Cultured, Humans, Inflammation, Lipopolysaccharides, Models, Biological, Mutation, Neurotoxins, Protein Binding, Transcription, Genetic, Microglia, Neuroprotective Agents, Protein Subunits, Protein Transport, Mice, Transcription Factor RelA, HEK293 Cells, Dopaminergic Neurons

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