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Updated: Feb 22, 2026
Simultaneous Isolation of Principal Central Nervous System-Resident Cell Types from Adult Autoimmune Encephalomyelitis Mice
Published on: October 6, 2023
Splitting the "Unsplittable": Dissecting Resident and Infiltrating Macrophages in Experimental Autoimmune
Tobias Koeniger1, Stefanie Kuerten2,3
1Institute of Anatomy and Cell Biology, University of Würzburg, D-97070 Würzburg, Germany. tobias.koeniger@uni-wuerzburg.de.
Abstract:
Macrophages predominate the inflammatory landscape within multiple sclerosis (MS) lesions, not only regarding cellularity but also with respect to the diverse functions this cell fraction provides during disease progression and remission. Researchers have been well aware of the fact that the macrophage pool during central nervous system (CNS) autoimmunity consists of a mixture of myeloid cells. Yet, separating these populations to define their unique contribution to disease pathology has long been challenging due to their similar marker expression. Sophisticated lineage tracing approaches as well as comprehensive transcriptome analysis have elevated our insight into macrophage biology to a new level enabling scientists to dissect the roles of resident (microglia and non-parenchymal macrophages) and infiltrating macrophages with unprecedented precision. To do so in an accurate way, researchers have to know their toolbox, which has been filled with diverse, discriminating approaches from decades of studying neuroinflammation in animal models. Every method has its own strengths and weaknesses, which will be addressed in this review. The focus will be on tools to manipulate and/or identify different macrophage subgroups within the injured murine CNS.
Insights
Macrophages are key in multiple sclerosis (MS) lesions. New tools precisely identify different macrophage types in the central nervous system (CNS), aiding neuroinflammation research.
Area of Science:
- Neuroimmunology
- Cellular Biology
Background:
- Macrophages are central to the inflammatory response in multiple sclerosis (MS) lesions within the central nervous system (CNS).
- Distinguishing between resident and infiltrating macrophage populations in CNS autoimmunity has been historically challenging due to overlapping marker expression.
- Understanding these distinct macrophage subsets is crucial for dissecting their roles in disease pathology and remission.
Purpose of the Study:
- To review current methodologies for identifying and manipulating distinct macrophage subgroups in the injured murine CNS.
- To provide researchers with an understanding of the strengths and weaknesses of various tools used in neuroinflammation studies.
- To enhance the precise dissection of macrophage contributions to CNS autoimmunity.
Main Methods:
- Lineage tracing approaches
- Transcriptome analysis
- Review of established and novel techniques for macrophage identification in murine CNS models.
Main Results:
- Advanced techniques like lineage tracing and transcriptome analysis offer unprecedented precision in dissecting macrophage populations.
- A comprehensive toolbox of methods exists for studying macrophage heterogeneity in neuroinflammation.
- The review details the strengths and limitations of various approaches for analyzing macrophage subgroups in the injured CNS.
Conclusions:
- Sophisticated tools now enable precise differentiation and functional analysis of macrophage subsets in CNS autoimmunity.
- Accurate identification of macrophage populations is essential for advancing our understanding of neuroinflammation and developing targeted therapies.
- This review serves as a guide to the essential methodologies for studying macrophage roles in the injured murine CNS.
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