Clinical significance of active myeloperoxidase in carotid atherosclerotic plaques

in International Journal of Cardiology (2011), 152(1), 149-151

A new easy method for specific measurement of active myeloperoxidase in human biological fluids and tissue extracts

in Talanta (2009), 80

The SIEFED (“Specific Immunological Extraction Followed by Enzymatic Detection”) method already developed for the specific detection of the activity of equine myeloperoxidase (MPO) was adapted for the ... [more ▼]

The SIEFED (“Specific Immunological Extraction Followed by Enzymatic Detection”) method already developed for the specific detection of the activity of equine myeloperoxidase (MPO) was adapted for the specific measurement of active human MPO in biological fluids or tissue extracts. [less ▲]

Long-term prognostic significance of high-sensitivity C-reactive protein before and after coronary angioplasty in patients with stable angina pectoris

in American Journal of Cardiology (2007), 99(1), 31-35

We examined whether an increase in high-sensitivity C-reactive protein (hs-CRP) after percutaneous coronary intervention (PCI) predicts long-term prognosis in patients with stable angina pectoris. hs-CRP ... [more ▼]

We examined whether an increase in high-sensitivity C-reactive protein (hs-CRP) after percutaneous coronary intervention (PCI) predicts long-term prognosis in patients with stable angina pectoris. hs-CRP is an inflammatory marker that predicts future cardiovascular events in healthy subjects and patients with unstable and stable coronary syndromes. Long-term evaluation of pre- and postprocedural inflammatory markers has not been widely reported. In particular, the effect of the magnitude of increase in hs-CRP after PCI in stable patients is unknown. We prospectively analyzed 89 stable patients treated by PCI for stable angina pectoris. Patients were recruited between August 1998 and May 1999, and the population was followed until August 2005 (mean follow-up 79.5 +/- 10.3 months). A major adverse cardiac event (MACE) was defined as the occurrence of cardiac death, myocardial infarction, or recurrent angina requiring repeat PCI or coronary artery bypass grafting. During the follow-up period, 36 patients presented with > or =1 MACE. In multivariate analysis, independent predictors of the occurrence of MACEs were previous myocardial infarction and a significant increase in hs-CRP after PCI (p = 0.004 and 0.003, respectively). A significant increase in hs-CRP after PCI was found to be more predictive of MACEs than hs-CRP before and after PCI. In conclusion, in stable coronary artery disease, inflammation is associated with long-term adverse events, but the magnitude of the inflammatory reaction after PCI appears more predictive than the baseline value. [less ▲]

Early release of neutrophil markers of activation after direct stenting in patients with unstable angina

in Coronary Artery Disease (2005), 16(1), 59-65

Objective To assess polymorphonuclear neutrophils activation after stenting in acute coronary syndromes studied by myeloperoxydase, lactoferrin and elastase release in this clinical setting. Methods ... [more ▼]

Objective To assess polymorphonuclear neutrophils activation after stenting in acute coronary syndromes studied by myeloperoxydase, lactoferrin and elastase release in this clinical setting. Methods Myeloperoxydase, lactoferrin, elastase, C-reactive protein and cytokines serum levels were assessed in 20 patients undergoing catheterization for unstable angina. Serial sampling starting before arteriography and continued up to 24 h was carried out in 15 patients undergoing direct stenting (group A) and in five patients assessed by coronary angiography only (group B). Results Myeloperoxydase, lactoferrin and elastase levels remained unchanged following catheterization, whereas a significant increase in myeloperoxydase (P=0.0009) and lactoferrin (P=0.004) was observed after stenting. No change in levels of tumour necrosis factor alpha, interleukin (IL)-8 and IL-12 was found in group B after catheterization at the different sampling times, although IL-8 and IL-12 levels increased transiently following stenting. IL-6 values increased in both groups. Baseline values of C-reactive protein were similar in each group. A progressive increase in C-reactive protein was noted in both groups and appeared to be larger following stenting (group A: P=0.0002; group B: P=0.01). Conclusions In patients with unstable angina, stenting is associated by immediate neutrophil activation followed by release of inflammatory cytokines (IL-6, IL-8, IL-12) and C-reactive protein elevation. This study points out a potential role of myeloperoxydase as a trigger for inflammatory reaction in patients with unstable coronary syndromes undergoing percutaneous coronary intervention. (C) 2005 Lippincott Williams WillZins. [less ▲]

Extensions des techniques de reparation valvulaire mitrale: chirurgie de l'endocardite et des tumeurs valvulaires

in Revue Médicale de Liège (2000), 55(10), 950-3

Mitral valve repair has demonstrated its superiority over valve replacement. Mitral valve repair constitutes the optimal therapeutic option in case of degenerative dystrophic, rheumatic, congenital or ... [more ▼]

Mitral valve repair has demonstrated its superiority over valve replacement. Mitral valve repair constitutes the optimal therapeutic option in case of degenerative dystrophic, rheumatic, congenital or ischemic mitral valve disease. These surgical techniques can also be successfully and advantageously applied in case of bacterial endocarditis or tumoral valvular disease. We report a case of staphylococcal endocarditis and another case of posterior leaflet fibroelastoma to show the place of conservative mitral surgery in these unusual indications. [less ▲]