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Author Spotlight: Using Zebrafish to Explore Microglia Migration During Brain Development
Published on: May 17, 2024
The brain's polymath: Emerging roles of microglia throughout brain development
Fong Kuan Wong1, Emilia Favuzzi2
1Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, M13 9PT, United Kingdom; Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, UK. Electronic address: https://twitter.com/brainotopia.
Abstract:
Microglia, the resident brain immune cells, have garnered a reputation as major effectors of circuit wiring due to their ability to prune synapses. Other roles of microglia in regulating neuronal circuit development have so far received comparatively less attention. Here, we review the latest studies that have contributed to our increased understanding of how microglia regulate brain wiring beyond their role in synapse pruning. We summarize recent findings showing that microglia regulate neuronal numbers and influence neuronal connectivity through a bidirectional communication between microglia and neurons, processes regulated by neuronal activity and the remodeling of the extracellular matrix. Finally, we speculate on the potential contribution of microglia to the development of functional networks and propose an integrative view of microglia as active elements of neural circuits.
Insights
Microglia (immune cells in the brain) regulate neural circuit development beyond synapse pruning. They influence neuronal numbers and connectivity through bidirectional communication, impacting brain wiring.
Area of Science:
- Neuroscience
- Immunology
- Developmental Biology
Background:
- Microglia are brain immune cells known for synapse pruning.
- Their broader roles in neural circuit development are less understood.
Purpose of the Study:
- To review recent findings on microglia's roles in brain wiring beyond synapse pruning.
- To explore how microglia influence neuronal numbers and connectivity.
Main Methods:
- Literature review of recent studies on microglia and neural development.
- Synthesis of findings on microglia-neuron communication and extracellular matrix remodeling.
Main Results:
- Microglia regulate neuronal numbers and connectivity.
- Bidirectional communication between microglia and neurons is crucial.
- Neuronal activity and extracellular matrix remodeling modulate these processes.
Conclusions:
- Microglia actively shape neural circuits beyond synapse pruning.
- They contribute to functional network development.
- An integrated view positions microglia as key elements in neural circuits.
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