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Characterization and Isolation of Mouse Primary Microglia by Density Gradient Centrifugation
Published on: February 16, 2018
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Microglia through MFG-E8 signaling decrease the density of degenerating neurons and protect the brain from the
Eric Yuhsiang Wang1,2, Hank Szuhan Chen2, Meng-Chih Wu1,3
1Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.
Plos One
|August 7, 2024
Summary
Microglia clear stressed neurons after stroke via MFG-E8 signaling, reducing brain damage. Inhibiting this process increases neuronal survival but worsens stroke infarction.
Area of Science:
- Neuroscience
- Immunology
- Pathology
Background:
- Neuronal loss is a key feature of stroke and neurodegenerative diseases.
- Microglia are implicated in neuronal loss during disease progression.
Purpose of the Study:
- To investigate the role of microglia in neuronal loss following stroke.
- To determine the specific mechanisms by which microglia contribute to neuronal clearance.
Main Methods:
- Utilized a mouse model of stroke.
- Manipulated microglial activity through nonspecific stimulation and specific inhibition of MFG-E8 signaling.
- Assessed neuronal density and cortical infarction size.
- Employed microglia-depleted mice to confirm microglia-specific effects.
Main Results:
- Microglia significantly contribute to neuronal loss in the ischemic region, targeting stressed/degenerating neurons.
- Nonspecific microglial stimulation decreased neuronal density; inhibiting MFG-E8 signaling increased it.
- MFG-E8 signaling is crucial for microglial phagocytosis of neurons.
- Inhibition of MFG-E8 signaling exacerbated cortical infarction, despite increasing neuronal density.
Conclusions:
- Microglia, via MFG-E8 signaling, clear ischemic neurons after stroke.
- This microglial-mediated clearance limits the extent of cortical infarction.
- Targeting microglial phagocytosis pathways may offer therapeutic strategies for stroke.
