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Updated: Aug 13, 2026
09:42
A Fibrin-Enriched and tPA-Sensitive Photothrombotic Stroke Model
Published on: June 4, 2021
EXPRESS: Immunothrombosis May Drive Futile Reperfusion in Stroke
1Department of Neurology, University of Pittsburgh Medical Center, Pittsburgh, PA, 15213, USA.
Summary
Mechanical thrombectomy improves large-vessel occlusion stroke reperfusion but not functional recovery. The no-reflow phenomenon, or persistent hypoperfusion, hinders recovery by causing microvascular injury and immunothrombotic obstruction.
Area of Science:
- Neurology
- Vascular Biology
- Immunology
Background:
- Mechanical thrombectomy is standard for large-vessel occlusion stroke, achieving routine angiographic reperfusion.
- However, inconsistent functional recovery suggests limitations in current treatment paradigms.
Purpose of the Study:
- To explore the no-reflow phenomenon as a key factor limiting functional recovery after mechanical thrombectomy.
- To identify potential mechanisms underlying no-reflow and suggest future therapeutic strategies.
Main Methods:
- Review of evidence linking no-reflow to microvascular injury and immunothrombotic obstruction.
- Identification of candidate mechanisms including neutrophil-platelet interactions, endothelial activation, and neutrophil extracellular traps.
Main Results:
- No-reflow, characterized by persistent tissue hypoperfusion despite successful large-vessel recanalization, is a significant barrier to recovery.
- Ischemia-reperfusion injury and distal microembolization contribute to microvascular dysfunction and immunothrombotic processes.
Conclusions:
- Future research should focus on prospectively phenotyping no-reflow using perfusion imaging and biomarkers.
- Testing adjunct therapies targeting microvascular dysfunction is crucial to improve outcomes after stroke reperfusion.
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