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Published on: April 13, 2017
Genetic targeting of microglia
Peter Wieghofer1, Klaus-Peter Knobeloch, Marco Prinz
1Institute of Neuropathology, University of Freiburg, Freiburg, Germany; Faculty of Biology, University of Freiburg, Freiburg, Germany.
Abstract:
Genetic targeting of microglia and other myeloid cells in the central nervous system (CNS) is highly desirable as they are critical effectors and regulators of changes in CNS homeostasis during development as well as in health and disease. Therefore, genetic reprogramming of microglia could constitute a central approach for potentially reducing disease burden. Previous attempts to target only microglia in vivo failed because of the similarities to their hematopoietic relatives in the circulation. However, this concept has been challenged by recent results of developmental and gene expression profiling studies which used novel molecular biological tools to unravel the origin of microglia and to define their role as specialized tissue macrophages clearly distinct from monocytes or monocyte-derived macrophages. The aim of this review is to recapitulate the history of microglia targeting approaches and finally highlight recent achievements in the field. We will discuss the pros and cons of the newly available genetic tools, their potential for future microglia research and genetic strategies.
Insights
Genetic reprogramming of microglia, key immune cells in the central nervous system (CNS), offers a promising therapeutic strategy. Recent advances distinguish microglia from other myeloid cells, enabling targeted genetic approaches for CNS diseases.
Area of Science:
- Neuroimmunology
- Cellular and Molecular Neuroscience
- Genetics and Genomics
Background:
- Microglia and other myeloid cells are crucial for central nervous system (CNS) homeostasis and disease.
- Previous in vivo genetic targeting of microglia was hindered by similarities to circulating hematopoietic cells.
- Recent studies highlight microglia as distinct tissue-resident macrophages, separate from monocytes.
Purpose of the Study:
- To review the historical development of microglia targeting strategies.
- To discuss recent advancements and novel genetic tools for microglia research.
- To explore the potential of genetic reprogramming for CNS diseases.
Main Methods:
- Review of developmental and gene expression profiling studies.
- Analysis of novel molecular biological tools for cell origin and function.
- Evaluation of genetic tools for targeting microglia in vivo.
Main Results:
- Microglia are evolutionarily and functionally distinct from peripheral myeloid cells.
- Novel genetic tools allow for more precise targeting of microglia.
- Recent findings challenge previous limitations in microglia-specific genetic manipulation.
Conclusions:
- Genetic reprogramming of microglia presents a viable therapeutic avenue for CNS disorders.
- Emerging genetic tools offer unprecedented opportunities for microglia research.
- Understanding microglia's unique identity is key to developing effective genetic strategies.
