Şapira, Violeta, Lilios, Gabriela, Adumitresi, Cecilia, Rusali, A., Cojocaru, Lucia, and Craiu, Elvira
Introduction - Myeloperoxidase (MPO) is an abundant hemoproteine released mainly by activated neutrophil and is present in some tissue macrophages such as those in vascular lesions. MPO-catalyzed reactions have been attributed to potentially proatherogenic biological activities throughout the evolution of cardiovascular disease, including during initiation, propagation and acute complication phases of the atherosclerotic process. Objective - We have examined the association between myeloperoxidase serum levels and the prognosis of pacients with unstable angina. Methods - We have evaluated 37 patients, age under 75, consequently hospitalized in the Cardiology Clinic of Emergency Clinic Hospital of Constanta, diagnosed with unstable angina and 18 healthy volunteers (without cardiovascular affections, hypercholesterolemia, diabetes and non-smokers). After discharge, the patients were monitored and the following data was recorded: death due cardiovascular cause and onset of major cardiovascular events or the need for coronary revascularization during 6 months of follow-up. The patients were divided in two groups: the first group - 10 patients with unstable angina with readmission in the following 6 months and the second group - 27 patients with unstable angina and good evolution. Myeloperoxidase activity was measured over a fixed time: T1 at hospital admission, T2 - at 48 hours and T3 - at discharge. Results - Serum MPO levels in patients with unstable angina and readmission in following months were significantly higher than in patients with good evolution (T1 - 2.4700 vs. 1.2259, pT = 0.0016; T2 - 2.9800 vs. 1.9667, pT = 0.0426; T3 - 3.2200 vs. 16259, pT = 0.0012) or in age-matched control patients (2.4700 vs 0.8444, pT=0.0002; 2.9800 vs 0.8444, pT<0.0001; 3.2200 vs 0.8444, pT<0.0001). Conclusion - Based on our study, we conclude that myeloperoxidase are elevated in serum after acute coronary event. In patients with unstable angina, increased MPO serum levels predicts an increased risk for subsequent cardiovascular events, so that MPO may serve both as a marker of diagnosis and as prognosis in patients who present chest pain. [ABSTRACT FROM AUTHOR]