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Published on: April 13, 2017
Microglia: Immune and non-immune functions
Katharina Borst1, Anaelle Aurelie Dumas1, Marco Prinz2
1Institute of Neuropathology, Medical Faculty, University of Freiburg, Freiburg, Germany.
Abstract:
As resident macrophages of the central nervous system (CNS), microglia are associated with diverse functions essential to the developing and adult brain during homeostasis and disease. They are aided in their tasks by intricate bidirectional communication with other brain cells under steady-state conditions as well as with infiltrating peripheral immune cells during perturbations. Harmonious cell-cell communication involving microglia are considered crucial to maintain the healthy state of the tissue environment and to overcome pathology such as neuroinflammation. Analyses of such intercellular pathways have contributed to our understanding of the heterogeneous but context-associated microglial responses to environmental cues across neuropathology, including inflammatory conditions such as infections and autoimmunity, as well as immunosuppressive states as seen in brain tumors. Here, we summarize the latest evidence demonstrating how these interactions drive microglia immune and non-immune functions, which coordinate the transition from homeostatic to disease-related cellular states.
Insights
Microglia, the brain's immune cells, communicate with other cells to maintain brain health and combat disease. Understanding these interactions is key to understanding brain disorders.
Area of Science:
- Neuroscience
- Immunology
- Cell Biology
Background:
- Microglia are the resident macrophages of the central nervous system (CNS).
- They play vital roles in brain development, homeostasis, and disease.
- Microglia engage in bidirectional communication with CNS and peripheral cells.
Purpose of the Study:
- To summarize recent findings on microglia-CNS and microglia-peripheral cell interactions.
- To elucidate how these interactions influence microglial functions in health and disease.
- To understand the transition of microglia from homeostatic to disease-associated states.
Main Methods:
- Review of current scientific literature on microglial cell communication.
- Analysis of intercellular pathways in various neuropathologies.
- Examination of microglial responses in inflammatory and immunosuppressive conditions.
Main Results:
- Microglial communication is crucial for maintaining CNS homeostasis and combating neuroinflammation.
- Interactions drive both immune and non-immune functions of microglia.
- Microglial responses are heterogeneous and context-dependent across neuropathologies.
- These interactions coordinate the shift from homeostatic to disease-related microglial states.
Conclusions:
- Cell-cell communication involving microglia is fundamental to brain health and disease.
- Understanding these interactions provides insights into neuropathology and potential therapeutic targets.
- Targeting microglial communication pathways could modulate disease progression.
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