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[Observation of platelet activation in coronary heart disease]
Insights
Platelet activation, measured by granule membrane protein-140 (GMP-140), peaks 48 hours post-acute myocardial infarction (AMI) and is lower in unstable angina (UA) patients compared to AMI. GMP-140 levels normalize within days to weeks.
Area of Science:
- Cardiovascular Medicine
- Hematology
- Immunology
Context:
- Platelet activation is a key factor in acute myocardial infarction (AMI) and unstable angina (UA).
- Granule membrane protein-140 (GMP-140) is a marker of platelet activation.
- Assessing platelet activation can aid in understanding cardiovascular disease progression.
Purpose:
- To evaluate platelet activation in patients with AMI and UA using a monoclonal antibody against GMP-140.
- To determine the temporal changes in platelet surface GMP-140 and plasma GMP-140 concentrations following AMI.
- To compare the degree of platelet activation between AMI and UA patients.
Summary:
- A monoclonal antibody targeting GMP-140 was used to assess platelet activation in 16 AMI and 14 UA patients.
- GMP-140 on platelet surfaces peaked at 48 hours post-AMI, returning to baseline by day seven.
- Plasma GMP-140 increased by day one, normalizing by day ten, with lower activation observed in UA compared to AMI.
Impact:
- Provides insights into the kinetics of platelet activation in AMI and UA.
- Highlights GMP-140 as a potential biomarker for assessing platelet activation in cardiovascular events.
- Suggests differential platelet activation patterns between AMI and UA, relevant for clinical management.
Abstract:
A monoclonal antibody specific for alpha-granule membrane protein (GMP-140) of platelets was used to evaluate the platelet activation degree in 16 cases with acute myocardial infarction (AMI) and 14 cases with unstable angina (UA). The number of GMP-140 molecules on platelet surface reached the highest 48 hours after AMI attack and returned to baseline at the seventh day. The concentration of GMP-140 in plasma began to increase at the first day and decreased to normal at the tenth day. The degree of platelet activation in patients with UA is less than that of AMI.