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Updated: Jul 25, 2025
Three-dimensional Confocal Analysis of Microglia/macrophage Markers of Polarization in Experimental Brain Injury
Published on: September 4, 2013
Regulation of microglia polarization after cerebral ischemia
Hao Wang1, Jingjing Li1, Han Zhang2
1Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Jiangsu Province Co-innovation Center of Neuroregeneration, NMPA Key Laboratory for Research and Evaluation of Tissue Engineering Technology Products, Nantong University, Nantong, China.
Abstract:
Stroke ranks second as a leading cause of death and permanent disability globally. Microglia, innate immune cells in the brain, respond rapidly to ischemic injury, triggering a robust and persistent neuroinflammatory reaction throughout the disease's progression. Neuroinflammation plays a critical role in the mechanism of secondary injury in ischemic stroke and is a significant controllable factor. Microglia activation takes on two general phenotypes: the pro-inflammatory M1 type and the anti-inflammatory M2 type, although the reality is more complex. The regulation of microglia phenotype is crucial to controlling the neuroinflammatory response. This review summarized the key molecules and mechanisms of microglia polarization, function, and phenotypic transformation following cerebral ischemia, with a focus on the influence of autophagy on microglia polarization. The goal is to provide a reference for the development of new targets for the treatment for ischemic stroke treatment based on the regulation of microglia polarization.
Insights
This review explores how microglia, brain immune cells, influence neuroinflammation after ischemic stroke. Understanding microglia polarization, particularly the role of autophagy, is key to developing new stroke treatments.
Area of Science:
- Neuroscience
- Immunology
- Cell Biology
Background:
- Stroke is a leading global cause of death and disability.
- Microglia, the brain's innate immune cells, drive neuroinflammation following ischemic injury.
- Neuroinflammation significantly contributes to secondary injury mechanisms in stroke.
Purpose of the Study:
- To review key molecules and mechanisms regulating microglia polarization after cerebral ischemia.
- To examine the influence of autophagy on microglia polarization in ischemic stroke.
- To identify potential therapeutic targets for stroke treatment by modulating microglia polarization.
Main Methods:
- Literature review of studies on microglia polarization in ischemic stroke.
- Analysis of molecular and cellular mechanisms governing microglia function.
- Focus on the interplay between autophagy and microglia phenotypes.
Main Results:
- Microglia exhibit M1 (pro-inflammatory) and M2 (anti-inflammatory) phenotypes, though reality is complex.
- Regulation of microglia polarization is critical for controlling neuroinflammation.
- Autophagy plays a significant role in modulating microglia polarization.
Conclusions:
- Modulating microglia polarization is a promising therapeutic strategy for ischemic stroke.
- Targeting the influence of autophagy on microglia offers potential new treatment avenues.
- Further research into microglia polarization mechanisms can advance stroke therapy.
