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Updated: Jul 8, 2025
A Cell Culture Model for Studying the Role of Neuron-Glia Interactions in Ischemia
Published on: November 14, 2020
Research progress on mechanisms of ischemic stroke: Regulatory pathways involving Microglia
Xin Gao1, Gang Su2, Miao Chai1
1Department of Neurology, Lanzhou University Second Hospital, Lanzhou, Gansu, 730030, China.
Abstract:
Microglia, as the intrinsic immune cells in the brain, are activated following ischemic stroke. Activated microglia participate in the pathological processes after stroke through polarization, autophagy, phagocytosis, pyroptosis, ferroptosis, apoptosis, and necrosis, thereby influencing the injury and repair following stroke. It has been established that polarized M1 and M2 microglia exhibit pro-inflammatory and anti-inflammatory effects, respectively. Autophagy and phagocytosis in microglia following ischemia are dynamic processes, where moderate levels promote cell survival, while excessive responses may exacerbate neurofunctional deficits following stroke. Additionally, pyroptosis and ferroptosis in microglia after ischemic stroke contribute to the release of harmful cytokines, further aggravating the damage to brain tissue due to ischemia. This article discusses the different functional states of microglia in ischemic stroke research, highlighting current research trends and gaps, and provides insights and guidance for further study of ischemic stroke.
Insights
Microglia, the brain's immune cells, play a dual role in ischemic stroke, influencing both injury and repair through various activation states. Understanding these microglial functions is crucial for developing effective stroke treatments.
Area of Science:
- Neuroscience
- Immunology
- Pathology
Background:
- Microglia are the primary immune cells in the central nervous system.
- Ischemic stroke triggers microglial activation, significantly impacting brain injury and recovery.
- Microglial functions, including polarization, autophagy, and cell death pathways, are critical in stroke pathology.
Purpose of the Study:
- To review the diverse functional states of microglia following ischemic stroke.
- To highlight current research trends and identify knowledge gaps in microglial research related to stroke.
- To provide insights for future investigations into ischemic stroke.
Main Methods:
- Literature review of microglial roles in ischemic stroke.
- Analysis of microglial polarization (M1/M2), autophagy, phagocytosis, pyroptosis, ferroptosis, apoptosis, and necrosis.
- Discussion of the impact of these processes on neuroinflammation and brain tissue damage.
Main Results:
- Microglial polarization (M1/M2) dictates pro-inflammatory and anti-inflammatory responses.
- Autophagy and phagocytosis have dose-dependent effects, with excessive activity potentially worsening stroke outcomes.
- Pyroptosis and ferroptosis in microglia exacerbate ischemic brain injury through cytokine release.
Conclusions:
- Microglial activation states are complex and critically influence ischemic stroke outcomes.
- Further research is needed to fully elucidate the therapeutic potential of targeting microglial functions in stroke.
- Understanding microglial dynamics offers promising avenues for novel stroke therapies.
