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Updated: Sep 1, 2025
Author Spotlight: In Vitro Co-Culture Model for Studying Microglia-Neuronal Interactions in Disease Conditions
Published on: July 26, 2024
Microglia-dependent remodeling of neuronal circuits
Joana R Guedes1,2, Pedro A Ferreira1,3, Jéssica M Costa1,2
1CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.
Abstract:
Microglia are tissue-resident macrophages responsible for the surveillance, neuronal support, and immune defense of the brain parenchyma. Recently, the role played by microglia in the formation and function of neuronal circuits has garnered substantial attention. During development, microglia have been shown to engulf neuronal precursors and participate in pruning mechanisms while, in the mature brain, they influence synaptic signaling, provide trophic support and shape synaptic plasticity. Recently, studies have unveiled different microglial characteristics associated with specific brain regions. This emerging view suggests that the maturation and function of distinct neuronal circuits may be potentially associated with the molecular identity microglia adopts across the brain. Here, we review and summarize the known role of these cells in the thalamus, hippocampus, cortex, and cerebellum. We focus on in vivo studies to highlight the characteristics of microglia that may be important in the remodeling of these neuronal circuits and in relation to neurodevelopmental and neuropsychiatric disorders.
Insights
Microglia, the brain's immune cells, play crucial roles in neuronal circuit development and function. Their regional identity influences brain maturation and may be linked to neurodevelopmental disorders.
Area of Science:
- Neuroscience
- Immunology
- Cell Biology
Background:
- Microglia are brain-resident macrophages crucial for neural surveillance, support, and immune defense.
- Emerging research highlights microglia's significant involvement in neuronal circuit formation and function throughout life.
Purpose of the Study:
- To review and summarize the roles of microglia in specific brain regions (thalamus, hippocampus, cortex, cerebellum).
- To highlight how microglial characteristics influence neuronal circuit remodeling and their relation to neurodevelopmental and neuropsychiatric disorders.
Main Methods:
- Focus on in vivo studies.
- Review of existing literature on microglial function in distinct brain areas.
Main Results:
- Microglia are involved in engulfing neuronal precursors and pruning during development.
- In mature brains, microglia modulate synaptic signaling, provide trophic support, and shape plasticity.
- Distinct microglial characteristics are observed across different brain regions, suggesting region-specific functions.
Conclusions:
- Microglial regional identity is potentially linked to the maturation and function of specific neuronal circuits.
- Understanding these regional microglial roles is vital for addressing neurodevelopmental and neuropsychiatric disorders.
