The brain's polymath: Emerging roles of microglia throughout brain development

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.