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Updated: Jun 27, 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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Microglial TNFα controls daily changes in synaptic GABAARs and sleep slow waves.
Maria Joana Pinto1, Lucy Bizien1, Julie M J Fabre1
1Institut de Biologie de l'École Normale Supérieure (IBENS), École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, France.
The Journal of Cell Biology
|May 2, 2024
Summary
Microglia regulate brain function during sleep by influencing inhibitory synapses. This process, involving purinergic signaling and TNFα, is crucial for memory consolidation.
Area of Science:
- Neuroscience
- Cell Biology
- Sleep Science
Background:
- Microglia are immune cells in the brain that respond to environmental changes.
- The mechanisms by which microglia adapt brain physiology are not fully understood.
Purpose of the Study:
- To investigate the role of microglia in regulating cortical inhibitory synapses during sleep.
- To elucidate the molecular pathways involved in microglia-mediated synaptic plasticity.
Main Methods:
- Activity-dependent regulation of cortical inhibitory synapses by microglia.
- Investigated purinergic signaling via P2RX7 and microglia-derived TNFα.
- Examined sleep-induced synaptic enrichment of GABAARs.
Main Results:
- Microglia regulate inhibitory synapses via purinergic signaling (P2RX7) and TNFα.
- Sleep promotes GABAAR enrichment at synapses, dependent on microglial TNFα and P2RX7.
- Depletion of microglial TNFα impairs slow waves during NREM sleep and memory consolidation.
Conclusions:
- Microglia orchestrate sleep-intrinsic plasticity of synaptic GABAARs.
- Microglia play a key role in sculpting sleep slow waves.
- Microglial functions are essential for memory consolidation during sleep.
