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Characterization and Isolation of Mouse Primary Microglia by Density Gradient Centrifugation
Published on: February 16, 2018
A simple magnetic separation method for high-yield isolation of pure primary microglia
Richard Gordon1, Colleen E Hogan, Matthew L Neal
1Department of Biomedical Sciences, Iowa Center for Advanced Neurotoxicology, Iowa State University, Ames, IA 50011, USA.
Journal of Neuroscience Methods
|November 16, 2010
Summary
Researchers developed a new method to isolate pure, functional microglial cells from mouse brains. This technique overcomes previous limitations, enabling more extensive research into microglial roles in brain health and neurodegenerative diseases.
Area of Science:
- Neuroscience
- Immunology
- Cell Biology
Background:
- Microglial cells are crucial for brain functions including development, repair, and neuroinflammation.
- Sustained microglial activation is implicated in neurodegenerative disease progression.
- Obtaining sufficient pure primary microglia for research has been a significant challenge.
Purpose of the Study:
- To develop a novel, high-yield protocol for isolating primary microglial cells.
- To overcome limitations in obtaining pure microglia for mechanistic studies.
Main Methods:
- A column-free magnetic separation protocol using tetrameric antibody complexes (TAC).
- Optimized culture conditions for high microglial density in mixed glial cultures.
- Utilized CD11b-PE labeled microglia, dextran magnetic nanoparticles, and an FcR blocker.
Main Results:
- High-yield isolation of primary microglia with an average of >3×10⁶ cells per mouse pup.
- Achieved remarkable purity (97%) and recovery (87%) of microglia.
- Isolated microglia were confirmed to be fully functional.
Conclusions:
- The novel magnetic separation protocol provides a reliable method for obtaining large quantities of pure, functional microglia.
- This advancement facilitates further research into microglial function in CNS health and disease.
- The protocol addresses a key bottleneck in neuroinflammation and neurodegeneration research.
