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Tie2 activation protects against prothrombotic endothelial dysfunction in COVID-19
Medrxiv : the Preprint Server for Health Sciences
|May 25, 2021
Summary
Severe COVID-19 causes endothelial dysfunction and thrombosis by disrupting the Tie2-angiopoietin axis. Activating Tie2 with AKB-9778 reversed these prothrombotic changes, suggesting a therapeutic approach for COVID-19 patients.
Area of Science:
- Vascular Biology
- Immunology
- Infectious Diseases
Background:
- Severe COVID-19 is linked to microvascular thrombosis and endothelial dysfunction.
- The Tie2 receptor and its ligand angiopoietin-2 (Angpt-2) normally maintain an anticoagulant endothelial surface.
- Inflammation can lead to Angpt-2 release, inhibiting Tie2 and promoting a prothrombotic state.
Conclusions:
- Severe COVID-19 disrupts Tie2-angiopoietin signaling, leading to endothelial procoagulant dysfunction.
- These findings support the rationale for Tie2-activating therapies, like AKB-9778, in treating severe COVID-19.
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