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Isolation of Cortical Microglia with Preserved Immunophenotype and Functionality From Murine Neonates
Published on: January 30, 2014
Microglia prune developing cortical blood vessels through PD-1 signaling
Mengtian Zhang1,2,3, Yanyan Wang1,2, Runhua Yang1,2
1State Key Laboratory of Organ Regeneration and Reconstruction, Institute of Zoology, Chinese Academy of Science, Beijing, China.
Nature Neuroscience
|July 16, 2026
Summary
Microglia, immune cells in the brain, actively prune excess cerebral vessels during development. This process is regulated by the PD-L1-PD-1 pathway and microglial CD5L secretion, crucial for forming efficient brain vascular networks.
Area of Science:
- Neuroscience
- Developmental Biology
- Immunology
Background:
- Cerebrovascular development involves vessel pruning to create efficient networks.
- Microglia are key in neural development but their role in vascular pruning is unknown.
Purpose of the Study:
- To investigate the role of microglia in cerebrovascular pruning.
- To elucidate the mechanisms of microglia-vessel interactions during brain development.
Main Methods:
- Visualization and manipulation of microglia-vessel interactions in mouse frontal cortex.
- Analysis of the PD-L1-PD-1 signaling axis and microglial CD5L secretion.
Main Results:
- Microglia were observed to approach and prune cerebral vessels.
- The PD-L1-PD-1 signaling pathway was identified as a regulator of this pruning process.
- Microglial CD5L secretion was found to mediate vascular pruning.
Conclusions:
- Microglia play a significant role in targeting redundant vasculature for elimination.
- This microglia-driven vascular pruning is essential for efficient vascular network formation in the developing brain.
