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Updated: Jun 10, 2025

Microfluidics in Assessing Platelet Function
Published on: November 8, 2024
The Effect of Antiplatelet Therapy on COVID-19
Insights
SARS-CoV-2 affects platelets, increasing thrombosis risk in COVID-19. Antiplatelet therapy may succeed if initiated early in moderate cases, warranting future clinical trials.
Area of Science:
- Hematology
- Virology
- Cardiovascular Medicine
Background:
- SARS-CoV-2 infection significantly impacts platelet function.
- Activated platelets contribute to the prothrombotic state observed in COVID-19 patients.
- Current international guidelines do not recommend antiplatelet therapy for COVID-19.
Purpose of the Study:
- To analyze the role of platelets in COVID-19-associated thrombosis.
- To investigate the potential efficacy of antiplatelet therapy in COVID-19.
- To identify optimal conditions for antithrombotic therapy in COVID-19.
Main Methods:
- Review of existing clinical studies on COVID-19 and thrombosis.
- Analysis of platelet activation pathways in SARS-CoV-2 infection.
- Comparison with clinical trial outcomes for anticoagulant therapies.
Main Results:
- Platelet activation by SARS-CoV-2 leads to prothrombotic substance release and coagulation activation.
- Existing clinical trials for antiplatelet therapy in COVID-19 have yielded inconclusive results.
- Anticoagulant therapy studies suggest early initiation in moderate-severity cases is crucial for success.
Conclusions:
- The timing of initiation and target patient severity are critical factors for the success of antiplatelet therapy in COVID-19.
- Future clinical trials should explore antiplatelet interventions in carefully selected COVID-19 patient populations, focusing on early treatment in moderate disease.
- Optimizing antithrombotic strategies, including antiplatelet agents, requires further investigation in specific COVID-19 contexts.
Abstract:
Platelets are one of the major targets of SARS-CoV-2. Activated platelets release prothrombotic substances, express adhesion molecules, and activate coagulation, thereby contributing to the thrombotic tendency in COVID-19. However, the antiplatelet therapy is not recommended in the current international guidelines. We think that the initiation timing and the target severity are the causes of the failure in clinical trials. As shown in the clinical studies that examined the effects of anticoagulants, early initiation in moderate severity is necessary for the success of antithrombotic therapy. Future trials are warranted to study the effects of antiplatelets in such conditions.
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