Cited by 192Neuroinflammation and Neurodegeneration MechanismsImmune Response and InflammationInflammasome and immune disorders

Neuronal injury mediated via stimulation of microglial toll-like receptor-9 (TLR9)

Iliev, Asparouh I., Stringaris, Argyrios K., Nau, Roland, Neumann, Harald·2004·The FASEB Journal

Abstract

Innate immune cells express toll‐like receptor‐9 (TLR9) and respond to unmethylated, CG dinucleotide motif‐rich DNA released from bacteria during infection or endogenous cells during autoimmune tissue injury. Oligonucleotides containing CG dinucleotide (CpG‐DNA) mimic the effect of unmethylated DNA and stimulate TLR9. CpG‐DNA was cytotoxic to neurons in organotypic brain cultures. Neurotoxicity of CpG‐DNA was mediated via microglial cells and started primarily from neurites as determined by time‐lapse imaging of enhanced green fluorescent protein (EGFP)‐transfected neurons. Cultured brain microglial cells expressed TLR9 and responded to CpG‐DNA by production of the inflammatory mediators nitric oxide (NO) and tumor necrosis factor‐α (TNF‐α). Blockade of NO synthase and TNF‐α prevented damage of neurites and neurotoxicity of CpG‐DNA. The data suggest that stimulation of microglia via TLR9 and subsequent release of NO and TNF‐α is a major source of neurotoxicity in bacterial and autoimmune brain tissue injury.

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Crossref · 10.1096/fj.03-0670fje

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Authors
Iliev, A. I., Stringaris, A. K., Nau, R., & Neumann, H.
Affiliations
  • European Neuroscience Institute Göttingen (DE)
  • University of Göttingen (DE)
Venue
The FASEB Journal
Publisher
Wiley
Published
2003-12-19
Volume
18
Issue
2
Pages
1-17
ISSN
  • 0892-6638 (ISSN-L)
  • 1530-6860
OpenAlex
W2129170329
Cited by
192
References
35
Citations by year
2026: 6 · 2025: 2 · 2024: 7 · 2023: 5 · 2022: 4 · 2021: 4 · 2020: 13 · 2019: 8 · 2018: 7 · 2017: 5 · 2016: 4 · 2015: 8 · 2014: 9 · 2013: 6 · 2012: 16
FWCI
7.15
Type
journal article
Language
en
Open access
closed
Locations
  • The FASEB Journal (publishedVersion)
  • PubMed (publishedVersion)
  • Research Portal (King's College London) (submittedVersion)
  • GRO (submittedVersion)
Funders
Deutsche Forschungsgemeinschaft
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
Keywords
TLR9, microglia, CpG DNA, neuroinflammation, neuronal injury, neurotoxicity, nitric oxide, TNF-α, innate immunity, bacterial infection, neurites, organotypic brain cultures
MeSH terms
Cells, Cultured, Cerebral Cortex, DNA, DNA-Binding Proteins, Hippocampus, Models, Biological, Neurons, Nitric Oxide, Oligonucleotides, Receptors, Cell Surface, Tumor Necrosis Factor-alpha, Neurites, Microglia, CpG Islands, DNA Methylation, Toll-Like Receptor 9, In Vitro Techniques

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