Microglia-mediated neuroinflammation and neuroplasticity after stroke
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Updated: Aug 30, 2025

Isolation and Flow Cytometric Assessment of Neuroimmune Interactions in a Mini-Stroke Murine Model
Published on: June 20, 2025
Yuan Wang1, Rehana K Leak2, Guodong Cao1,3
1Department of Neurology, University of Pittsburgh, Pittsburgh, PA, United States.
Abstract:
Stroke remains a major cause of long-term disability and mortality worldwide. The immune system plays an important role in determining the condition of the brain following stroke. As the resident innate immune cells of the central nervous system, microglia are the primary responders in a defense network covering the entire brain parenchyma, and exert various functions depending on dynamic communications with neurons, astrocytes, and other neighboring cells under both physiological or pathological conditions. Microglia activation and polarization is crucial for brain damage and repair following ischemic stroke, and is considered a double-edged sword for neurological recovery. Microglia can exist in pro-inflammatory states and promote secondary brain damage, but they can also secrete anti-inflammatory cytokines and neurotrophic factors and facilitate recovery following stroke. In this review, we focus on the role and mechanisms of microglia-mediated neuroinflammation and neuroplasticity after ischemia and relevant potential microglia-based interventions for stroke therapy.
Insights
Microglia, the brain's immune cells, are key in stroke recovery. Their dual role in inflammation and repair offers potential therapeutic targets for neurological recovery after ischemic stroke.
Area of Science:
- Neuroscience
- Immunology
- Pathology
Background:
- Stroke is a leading cause of global disability and mortality.
- The immune system, particularly microglia, significantly influences brain outcomes post-stroke.
- Microglia are central nervous system immune cells crucial for brain defense and repair.
Purpose of the Study:
- To review the role and mechanisms of microglia-mediated neuroinflammation and neuroplasticity after ischemic stroke.
- To explore potential microglia-based therapeutic interventions for stroke.
Main Methods:
- Literature review focusing on microglia activation, polarization, and function in ischemic stroke.
- Analysis of microglia's dual role in promoting damage and facilitating repair.
- Examination of neuroinflammation and neuroplasticity mechanisms involving microglia.
Main Results:
- Microglia activation and polarization are critical determinants of brain damage and repair post-stroke.
- Microglia can adopt pro-inflammatory states, exacerbating secondary brain injury.
- Conversely, microglia can secrete anti-inflammatory factors and neurotrophic factors, aiding neurological recovery.
Conclusions:
- Microglia represent a double-edged sword in neurological recovery following ischemic stroke.
- Understanding microglia's complex functions is essential for developing effective stroke therapies.
- Targeting microglia-based mechanisms holds promise for future stroke treatment strategies.
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