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OBJECTIVES To determine etravirine concentrations in CSF in HIV-infected patients. METHODS Twelve HIV-1 adult antiretroviral-experienced patients receiving an etravirine-containing regimen for at least 1 month were enrolled. Both CSF and blood samples were taken around 12 h after the last etravirine dose. Liquid chromatography-tandem mass spectrometry was(More)
BACKGROUND Platelet-derived microparticles (MPs) are believed to play an important role in coagulation and inflammatory disorders. Unfortunately, MP size renders them difficult to study and analyze by conventional flow cytometry. METHODS We analyzed and characterized platelet-derived MPs, using antibodies against the major surface glycoproteins (GP), the(More)
BACKGROUND Platelet activation is consistently observed in animal models of Helicobacter pylori infection and could help to explain the alleged epidemiological association between H. pylori and coronary heart disease. MATERIALS AND METHODS Ninety-two patients with recent acute coronary syndromes were enrolled. Helicobacter pylori-positive patients were(More)
We studied equine platelet function and activation using ultrastructural examination, flow cytometry, and perfusion. The main aim of the study was to evaluate hemostatic mechanisms in horses using these techniques. Ultrastructural observations were done on resting and activated platelets. Flow cytometry was used to evaluate binding of antibodies to major(More)
BACKGROUND Several strategies are being developed to reduce the risk of pathogen transmission associated with platelet (PLT) transfusion. STUDY DESIGN AND METHODS The impact of a new technology for pathogen reduction based on riboflavin plus illumination (Mirasol PRT, Navigant Biotechnologies, Inc.) at 6.2 and 12.3 J per mL on functional and biochemical(More)
INTRODUCTION Inherited giant platelet disorders (IGPD) are a heterogeneous group of rare diseases characterized by thrombocytopenia, large platelets and variable bleeding symptoms. Glycoprotein (GP) expression on platelet surface in these conditions is poorly characterized. We have investigated the expression of constitutively expressed platelet membrane GP(More)
BACKGROUND Filtered PLT concentrates (PCs) were prepared in plasma pooling three (for children) or six buffy coats (BCs; for adults) after holding them a maximum of 4 hours (blood bags collected in the afternoon) or 18 hours (blood bags collected in the morning). STUDY DESIGN AND METHODS With flow cytometry, PCs prepared after holding BCs 4 or 18 hours(More)
BACKGROUND The advent of new strategies for pathogen reduction has raised the question of whether platelet (PLT) concentrates (PCs) exposed to longer periods of storage retain adequate hemostatic function. STUDY DESIGN AND METHODS The effects of prolonged storage on adhesive and procoagulant functions of PLTs in PCs have been analyzed. The ability of PLTs(More)
INTRODUCTION Platelet activation leads to signal transduction mechanisms, in which phosphotyrosine proteins play a relevant role. MATERIAL AND METHODS Platelet suspensions were independently activated by collagen and thrombin in the absence and in the presence of two tyrosine kinase inhibitors, tyrphostin 47 and genistein. Samples were processed to(More)