Related Experiment Video
Updated: Jun 23, 2026
Derivation of Glial Restricted Precursors from E13 mice
Published on: June 20, 2012
Microglial precursors derived from mouse embryonic stem cells
Isabella Napoli1, Katrin Kierdorf, Harald Neumann
1Neural Regeneration Unit, Institute of Reconstructive Neurobiology, University Bonn and Hertie-Foundation, Bonn, Germany.
Abstract:
Microglia are resident immune cells of the central nervous system. They can be directly isolated from the brain or from mixed postnatal glial cultures. Isolation of primary microglia is inefficient due to low yield. The cell line BV2 was used as a substitute for primary microglia, but BV2 are oncogenically transformed cells. Here, we established a protocol to generate microglial precursor lines from mouse embryonic stem (ES) cells. Microglial precursor cells were obtained from murine ES cells by differentiation of embryoid bodies to microglia within a mixed brain culture. Several independent ES cell-derived microglial precursor (ESdM) lines were generated and characterized by flow cytometry, immunocytochemistry, and functional assays. All ESdM showed expression of IBa1, CD11b, CD45, F4/80, CD49d, and CD29, but were negative for cKit and CD34. Stimulation with interferon-gamma or lipopolysaccharide (LPS) demonstrated upregulation of proinflammatory cytokine gene transcription including nitric oxide synthase-2, interleukin-1beta, and tumor necrosis factor-alpha at levels comparable to primary microglia. The ESdM showed efficient and rapid phagocytosis of microsphere beads, which was increased after stimulation with LPS. ESdM expressed the chemokine receptor CX3CR1 and demonstrated directed migration toward the ligand CX3CL1. After in vivo transplantation into postnatal brain tissue, ESdM showed engraftment as cells with a microglial phenotype and morphology. Thus, ESdM are stable proliferating cells substantially having most characteristics of primary microglia and therefore being a suitable tool to study microglial function in vitro and in vivo.
Insights
Researchers developed a new method to create microglial precursor lines from mouse embryonic stem cells. These ES cell-derived microglia (ESdM) offer a reliable alternative for studying microglial function in the central nervous system.
Area of Science:
- Neuroscience
- Immunology
- Stem Cell Biology
Background:
- Microglia are crucial immune cells in the central nervous system.
- Current methods for isolating primary microglia are inefficient, and existing cell lines like BV2 are oncogenically transformed.
- A need exists for a reliable, non-transformed cell model for microglial research.
Purpose of the Study:
- To establish a protocol for generating stable microglial precursor lines from mouse embryonic stem (ES) cells.
- To characterize these ES cell-derived microglial (ESdM) lines for their phenotypic and functional resemblance to primary microglia.
- To validate ESdM as a suitable tool for in vitro and in vivo studies of microglial function.
Main Methods:
- Differentiation of mouse ES cell embryoid bodies into microglial precursors within mixed brain cultures.
- Characterization using flow cytometry, immunocytochemistry, and functional assays (cytokine stimulation, phagocytosis, migration).
- In vivo transplantation into postnatal brain tissue to assess engraftment and phenotype.
Main Results:
- Established several independent ESdM lines exhibiting key microglial markers (IBa1, CD11b, CD45, F4/80).
- ESdM responded to inflammatory stimuli (IFN-γ, LPS) with upregulated pro-inflammatory cytokine gene expression, comparable to primary microglia.
- Demonstrated efficient phagocytosis and directed migration towards CX3CL1, and successful in vivo engraftment with microglial characteristics.
Conclusions:
- ESdM lines are stable, proliferating cells that recapitulate essential characteristics of primary microglia.
- These ESdM lines provide a valuable and consistent model for investigating microglial biology.
- ESdM represent a promising alternative to primary microglia and transformed cell lines for research applications.
