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Updated: Aug 20, 2025
Characterization and Isolation of Mouse Primary Microglia by Density Gradient Centrifugation
Published on: February 16, 2018
A simplified procedure for isolation of primary murine microglia
Nathan Scott1, Ken Witt1, Joseph M Schober1
1Department of Pharmaceutical Sciences, Southern Illinois University Edwardsville School of Pharmacy, Edwardsville, IL 62026, USA.
Abstract:
There are various approaches in which one can isolate microglia from murine brains, such as immunomagnetic, density gradient, FACS and differential adhesive methods. In this procedure a modified flask-tapping approach was used due to its simplicity and reproducibility. Our protocol requires only a single step to isolate the microglia from the mixed cell population. Once the microglia were isolated, we characterized cell purity, microglial morphology and phagocytic activity. The single-step protocol, without the need for additional astrocyte or oligodendrocyte separation, allows microglial cells to be used immediately for experimental purposes. The protocol is low-cost and can be performed in any lab with standard cell-culture equipment.
Insights
This study presents a simple, low-cost, single-step method for isolating microglia from murine brains. This reproducible protocol enables immediate use of pure microglial cells for experiments.
Area of Science:
- Neuroscience
- Immunology
- Cell Biology
Background:
- Microglia are crucial immune cells in the central nervous system.
- Existing methods for isolating microglia from murine brains can be complex and time-consuming.
- Standardized and efficient isolation protocols are essential for microglial research.
Purpose of the Study:
- To develop a simplified and reproducible method for isolating microglia from murine brains.
- To enable immediate experimental use of isolated microglial cells.
- To provide a cost-effective protocol for any laboratory setting.
Main Methods:
- A modified flask-tapping approach was employed for microglial isolation.
- The protocol involves a single step to separate microglia from a mixed cell population.
- Isolated cells were characterized for purity, morphology, and phagocytic activity.
Main Results:
- The flask-tapping method successfully isolated microglia with high purity.
- The protocol demonstrated simplicity and reproducibility.
- Isolated microglia were suitable for immediate downstream experimental applications.
Conclusions:
- This single-step, modified flask-tapping protocol offers an efficient, low-cost method for murine microglial isolation.
- The protocol bypasses the need for separating other glial cells like astrocytes and oligodendrocytes.
- This technique facilitates rapid and accessible microglial research.
