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Microglia: a promising therapeutic target in spinal cord injury
Xiaowei Zha1, Guoli Zheng1, Thomas Skutella2
1Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany.
Abstract:
Microglia are present throughout the central nervous system and are vital in neural repair, nutrition, phagocytosis, immunological regulation, and maintaining neuronal function. In a healthy spinal cord, microglia are accountable for immune surveillance, however, when a spinal cord injury occurs, the microenvironment drastically changes, leading to glial scars and failed axonal regeneration. In this context, microglia vary their gene and protein expression during activation, and proliferation in reaction to the injury, influencing injury responses both favorably and unfavorably. A dynamic and multifaceted injury response is mediated by microglia, which interact directly with neurons, astrocytes, oligodendrocytes, and neural stem/progenitor cells. Despite a clear understanding of their essential nature and origin, the mechanisms of action and new functions of microglia in spinal cord injury require extensive research. This review summarizes current studies on microglial genesis, physiological function, and pathological state, highlights their crucial roles in spinal cord injury, and proposes microglia as a therapeutic target.
Insights
Microglia, the central nervous system
Area of Science:
- Neuroscience
- Immunology
Background:
- Microglia are crucial for central nervous system (CNS) health, involved in repair, nutrition, and immune regulation.
- Spinal cord injury (SCI) alters the CNS microenvironment, leading to glial scarring and inhibiting axonal regeneration.
- Microglial activation and proliferation following SCI significantly influence injury outcomes, both positively and negatively.
Purpose of the Study:
- To review the current understanding of microglial genesis, function, and pathological roles in SCI.
- To highlight the multifaceted contributions of microglia to SCI pathophysiology.
- To identify microglia as a potential therapeutic target for SCI.
Main Methods:
- Literature review of studies on microglial biology and SCI.
- Analysis of microglial gene and protein expression changes post-injury.
- Examination of microglial interactions with other neural cells.
Main Results:
- Microglia exhibit dynamic changes in response to SCI, impacting tissue repair and regeneration.
- These immune cells play a dual role, mediating both beneficial and detrimental effects after injury.
- Microglia interact extensively with neurons, astrocytes, oligodendrocytes, and neural stem cells.
Conclusions:
- Microglia are central players in the complex response to spinal cord injury.
- Further research into microglial mechanisms is needed to harness their therapeutic potential.
- Targeting microglia offers a promising strategy for improving outcomes after SCI.
