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Isolation of Region-specific Microglia from One Adult Mouse Brain Hemisphere for Deep Single-cell RNA Sequencing
Published on: December 3, 2019
Unique transcriptome signature of mouse microglia
Clara Beutner1, Bettina Linnartz-Gerlach, Susanne V Schmidt
1Neural Regeneration, Institute of Reconstructive Neurobiology, University Bonn and Hertie-Foundation, 53127 Bonn, Germany.
Glia
|July 9, 2013
Summary
Microglial cells from different sources, including embryonic stem cell-derived microglia (ESdM), share unique transcriptome profiles distinct from other myeloid cells. ESdM and primary microglia show significant overlap, with minor differences in immune gene activation.
Area of Science:
- Neuroscience
- Immunology
- Stem Cell Biology
Background:
- Microglial cells are crucial for brain immunity.
- Understanding the molecular phenotype of microglia from various sources is essential.
- Current methods for microglia isolation include tissue dissociation, mechanical isolation, and stem cell differentiation.
Purpose of the Study:
- To compare the molecular phenotypes of microglia derived from different sources using whole transcriptome analysis.
- To elucidate the distinct transcriptional profiles of microglia and embryonic stem cell-derived microglia (ESdM).
- To assess the relationship between ESdM, primary cultured microglia, and sorted microglia.
Main Methods:
- Whole transcriptome analysis (microarray) of flow cytometry-sorted microglia, primary postnatal cultured microglia, and ESdM.
- Bioinformatic analysis to compare gene expression profiles.
- Flow cytometry analysis of cell surface markers (CD54, CD74, CD274).
Main Results:
- Microglia and ESdM exhibited unique transcriptome profiles, distinct from other myeloid cells, T cells, astrocytes, and neurons.
- ESdM and primary cultured microglia showed substantial overlap in their transcriptomes.
- A small number of differentially expressed genes were identified, primarily immune-related, with primary microglia showing higher pro-inflammatory gene expression than ESdM.
- Cell surface marker analysis confirmed the phenotypic similarity between ESdM and primary microglia.
Conclusions:
- Microglial cells possess a unique molecular identity, clearly differentiated from other macrophage types.
- ESdM represent a valuable model for studying microglial biology, closely resembling primary microglia.
- Transcriptome analysis provides a comprehensive understanding of microglial heterogeneity and origins.
