Why the study?
Is platelet GPVI surface expression elevated in patients with acute coronary syndrome compared to stable angina and healthy controls?
Is platelet GPVI surface expression elevated in patients with acute coronary syndrome compared to stable angina and healthy controls?
Platelet GPVI expression is significantly elevated in ACS patients and rises earlier than traditional markers of myocardial necrosis, potentially serving as a novel early marker for acute coronary syndrome.
Answers are grounded in this paper and cite their sources.
No study data on GPVI in ACS; leaves open its role as early marker.
The platelet collagen receptor glycoprotein (GP) VI is critical for the formation of arterial thrombosis. GPVI platelet surface expression was examined in patients with stable angina and in patients with acute coronary syndrome (ACS). Surface expression of platelet activation markers such as P-selectin, GPIbalpha, and platelet GPVI was determined by flow cytometry. Patients with ACS showed a significantly enhanced GPVI expression compared with patients with stable angina and healthy controls. The expression of GPVI correlated well with CD62P. Elevated platelet GPVI expression was associated with ACS independent of markers of myocardial necrosis such as troponin and creatine kinase. In ACS, platelet surface GPVI expression was already elevated several hours before troponin and creatine kinase indicated myocardial injury. We conclude that the determination of the platelet-specific thrombotic marker GPVI may help to identify patients at risk before myocardial ischemia is evident.
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Bigalke et al. (2007) studied this question.
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