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Platelet surface activation antigen expression at baseline and during elective angioplasty in patients with mild to
M R Cahill1, M G Macey, J R Dawson
1Department of Haematology, Royal London Hospital, Whitechapel.
Insights
Platelet activation, a key event in thrombosis, was significantly increased in patients with coronary artery disease. This finding offers insights into reducing mortality from heart disease and preventing restenosis after angioplasty.
Area of Science:
- Cardiovascular Medicine
- Hematology
- Thrombosis Research
Background:
- Platelet activation is a critical precursor to thrombus formation.
- Coronary artery disease (CAD) is the leading cause of mortality in the UK.
- Understanding platelet pathophysiology may reduce CAD-related deaths.
Purpose of the Study:
- To investigate platelet activation markers in patients with stable coronary artery disease.
- To compare platelet activation in CAD patients with a control group.
- To assess the impact of coronary angioplasty on platelet activation.
Main Methods:
- Flow cytometry was used to detect platelet surface markers.
- GP53 and activated GPIIb/IIIa expression were quantified.
- Serial studies were conducted on patients undergoing coronary angioplasty.
Main Results:
- Significantly elevated GP53 and activated GPIIb/IIIa expression were observed on platelets of CAD patients compared to controls.
- Coronary angioplasty led to an immediate and sustained increase in platelet activation.
Conclusions:
- Patients with coronary artery disease exhibit heightened platelet activation.
- Increased platelet activation following angioplasty has implications for restenosis prevention.
- Further research into platelet activation pathways could improve CAD management.
Abstract:
Platelet activation is an important pre-thrombotic event. The elucidation of its pathophysiology could contribute to a reduction in the mortality associated with coronary artery disease-the foremost cause of death in the UK. We examined the platelets of 27 patients with angiographically documented coronary artery disease. All patients had stable angina and were taking their regular medication-including aspirin. We demonstrated significantly increased expression of GP53 and activated GPIIb/IIIa on the platelet surface using a sensitive flow cytometric method of detection. Comparison was made with a control group of 35 patients. Seventeen of the patients had coronary angioplasty carried out. Serial studies of these patients demonstrate an immediate and sustained increase in platelet activation and this has important implications for prevention of restenosis after angioplasty.