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Updated: Jan 5, 2026
Three-dimensional Confocal Analysis of Microglia/macrophage Markers of Polarization in Experimental Brain Injury
Published on: September 4, 2013
Fingolimod promotes angiogenesis and attenuates ischemic brain damage via modulating microglial polarization
1Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China.
Introduction:
Microglial activation plays a crucial role in the pathology of ischemic stroke. Recently, we demonstrated that fingolimod (FTY720) exerted neuroprotective effects via immunomodulation in ischemic white matter damage induced by chronic cerebral hypoperfusion, which was accompanied by robust microglial activation. In this study, we assessed the pro-angiogenic potential of FTY720 in a murine model of acute cortical ischemic stroke.
Methods:
The photothrombotic (PT) method was used to induce cortical ischemic stroke in mice. We evaluated cortical damage, behavioral deficits, microglial polarization, and angiogenesis to identify the neuroprotective effects and possible molecular mechanisms of FTY720 in acute ischemic stroke.
Results:
In vivo, a reduction in neuronal loss and improved motor function were observed in FTY720-treated mice after PT stroke. Immunofluorescence staining revealed that robust microglial activation and the associated neuroinflammatory response in the peri-infarct area were ameliorated by FTY720 via its ability to polarize microglia toward the M2 phenotype. Furthermore, both in vivo and in vitro, angiogenesis was enhanced in the microglial M2 phenotype state. Behaviorally, a significant improvement in the FTY720-treated group compared to the control group was evident from days 7 to 14.
Conclusions:
Our research indicated that FTY720 treatment promoted angiogenesis via microglial M2 polarization and exerted neuroprotection in PT ischemic stroke.
Insights
Fingolimod (FTY720) treatment reduced neuronal loss and improved motor function in a mouse model of ischemic stroke by promoting M2 microglial polarization and enhancing angiogenesis.
Area of Science:
- Neuroscience
- Immunology
- Vascular Biology
Background:
- Microglial activation is key in ischemic stroke pathology.
- Fingolimod (FTY720) shows neuroprotection via immunomodulation in chronic hypoperfusion models.
- This study investigates FTY720's pro-angiogenic potential in acute ischemic stroke.
Purpose of the Study:
- To assess the neuroprotective and pro-angiogenic effects of FTY720 in acute cortical ischemic stroke.
- To elucidate the role of microglial polarization in FTY720's mechanism of action.
- To evaluate FTY720's impact on angiogenesis and behavioral recovery.
Main Methods:
- Acute cortical ischemic stroke induced using the photothrombotic (PT) method in mice.
- Evaluation of cortical damage, behavioral deficits, microglial polarization (M1/M2), and angiogenesis.
- Immunofluorescence staining and in vitro/in vivo assays to assess molecular mechanisms.
Main Results:
- FTY720 treatment reduced neuronal loss and improved motor function post-PT stroke.
- FTY720 ameliorated neuroinflammation by polarizing microglia towards the M2 phenotype.
- Enhanced angiogenesis was observed in conjunction with the M2 microglial phenotype.
Conclusions:
- FTY720 promotes angiogenesis through M2 microglial polarization.
- FTY720 exerts significant neuroprotection in photothrombotic ischemic stroke models.
- FTY720 represents a potential therapeutic agent for acute ischemic stroke.
