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Updated: Jun 9, 2025
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Isolation of Cortical Microglia with Preserved Immunophenotype and Functionality From Murine Neonates
Published on: January 30, 2014
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Microglia regulate cortical remyelination via TNFR1-dependent phenotypic polarization.
Athena Boutou1, Ilias Roufagalas1, Katerina Politopoulou1
1Laboratory of Molecular Genetics, Department of Immunology, Hellenic Pasteur Institute, 11521 Athens, Greece.
Cell Reports
|October 24, 2024
Summary
Targeting tumor necrosis factor receptor 1 (TNFR1) and related inflammatory pathways in microglia promotes central nervous system (CNS) remyelination and motor recovery in neurodegenerative diseases.
Area of Science:
- Neuroimmunology
- Neurobiology
- Cellular Biology
Background:
- Microglia are key immune cells in the central nervous system (CNS) implicated in demyelinating diseases.
- Understanding the mechanisms controlling CNS remyelination is crucial for treating neurodegenerative disorders.
- The precise roles of microglia in promoting or hindering CNS repair remain incompletely understood.
Purpose of the Study:
- To investigate the role of tumor necrosis factor receptor 1 (TNFR1) and associated inflammatory pathways in microglia-mediated CNS repair.
- To determine if modulating microglial inflammatory responses can enhance remyelination and motor function recovery.
Main Methods:
- Microglia-specific deletion of TNFR1 in a disease model.
- Pharmacological inhibition of soluble TNF (solTNF) and IL-1R.
- Single-cell transcriptomic analysis of the cortex.
- Longitudinal brain transcriptome analysis.
- In vivo validation of microglial inflammatory polarization pathways.
Main Results:
- Microglia-specific deletion of TNFR1 and inhibition of solTNF or IL-1R promoted maturation of disease-associated microglia with enhanced myelin phagocytosis.
- These interventions accelerated cortical remyelination and improved motor recovery.
- SolTNF inhibition shifted microglia towards reparative IL-10-responsive signatures while reducing damaging IL-1-related pathways.
- Earlier recovery was observed with therapeutic loss of microglia TNFR1.
- Disease-state microglia targeting IL-1/IL-18/caspase-11 were identified in human demyelinating lesions.
Conclusions:
- Modulating microglial inflammatory polarization by targeting cytokines like TNF and IL-1 is a promising therapeutic strategy.
- This approach can enhance CNS repair and functional recovery in demyelinating disorders.
- Targeting microglial TNFR1 and downstream inflammatory pathways offers a potential avenue for improving remyelination.
Keywords:
CP: ImmunologyCP: NeuroscienceDAMIL-1TNFdemyelinationmicrogliamultiple sclerosisneuroinflammationneuromyelitis opticaoligodendrocyte differentiationremyelinationMore Related Videos
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