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Wall passivation for unstable angina
M Lettino1, F Dailey-Sterling, L Badimon
1Cardiovascular Biology Research Laboratories, Mount Sinai School of Medicine, New York, NY 10029, USA.
Insights
Platelet aggregation in coronary arteries drives arterial thrombosis and ischemia in unstable angina. Novel anti-platelet therapies, including direct thrombin inhibitors and glycoprotein IIb/IIIa antagonists, offer improved control of vascular occlusion.
Area of Science:
- Cardiovascular Medicine
- Hematology
- Pharmacology
Background:
- Atherosclerotic plaque disruption is key to arterial thrombosis and ischemia.
- Platelets are central to unstable angina pathogenesis, causing obstruction and thrombus extension.
- Vascular occlusion is the primary target in unstable angina treatment.
Purpose of the Study:
- To summarize the role of the vessel wall and platelets in arterial thrombosis.
- To describe pharmacological approaches for platelet passivation in unstable angina.
Main Methods:
- Review of current literature on arterial thrombosis and unstable angina.
- Analysis of the interaction between the vessel wall and platelets.
- Evaluation of existing and novel pharmacological agents for passivation.
Main Results:
- Platelet aggregation can lead to mechanical obstruction and fibrin deposition.
- Direct thrombin inhibitors and glycoprotein IIb/IIIa receptor antagonists show promise for passivation.
- Understanding vessel wall-platelet interactions is crucial for therapeutic development.
Conclusions:
- Effective control of unstable angina requires managing the acute disease process.
- Novel anti-platelet agents may offer superior passivation compared to current therapies.
- Targeting platelet activity is essential for preventing vascular occlusion in unstable angina.
Abstract:
The disruption of an atherosclerotic plaque in a coronary artery, appears to be fundamental for the development of arterial thrombosis and resultant ischaemia. Platelets play a central role in the pathogenesis of unstable angina; they can aggregate and cause mechanical obstruction if large enough. In addition, they can lead to fibrin deposition and extension of the thrombus. The fundamental goal in the treatment of unstable angina is to control the acute disease process that leads to vascular occlusion. In addition to the currently available pharmacological agents used to treat unstable angina, newer agents such as the direct thrombin inhibitors and the glycoprotein IIb/IIIa receptor antagonists may be more effective in achieving 'passivation'. This article summarizes the role of the vessel wall and its interaction with platelets in arterial thrombosis. The different pharmacological approaches used in achieving passivation of platelets in unstable angina are described.