65 research outputs found
EPOXIDE OPENING WITH ORGANOCUPRATES AND GRIGNARD-REAGENTS IN THE PRESENCE OF CHIRAL LIGANDS
Evaluation of a new venous catheter blood draw device and its impact on specimen hemolysis rates
The extent of amotosalen photodegradation during photochemical treatment of platelet components correlates with the level of pathogen inactivation
Nachweis von radikalischen Zwischenstufen in der Coenzym-B12-abhängigen Methylmalonyl-CoA-Mutase-Reaktion durch ESR-Spektroskopie
Platelet dose consistency and its effect on the number of platelet transfusions for support of thrombocytopenia: an analysis of the SPRINT trial of platelets photochemically treated with amotosalen HCl and ultraviolet A light
Effects of riboflavin and amotosalen photoactivation systems for pathogen inactivation of fresh-frozen plasma on fibrin clot structure
Electron Paramagnetic Resonance Studies of the Methylmalonyl-CoA Mutase Reaction. Evidence for Radical Intermediates using Natural and Artificial Substrates as well as the Competitive Inhibitor 3-Carboxypropyl-CoA
Technical comparison of four different extracorporeal photopheresis systems
BACKGROUND
Extracorporeal photopheresis (ECP) is a therapeutic technique that combines leukapheresis and ultraviolet (UV)A irradiation of the leukapheresate after 8-methoxypsoralen treatment with subsequent retransfusion. It can be achieved with a single device (online) or by combining an apheresis machine with a separate UVA light source (offline). The comparability of both established methods is unknown.
STUDY DESIGN AND METHODS
In a prospective setting, four ECP systems were evaluated: one with integrated UVA irradiation for online ECP (Therakos) and three with external UVA irradiation for offline ECP (Amicus, Optia, and Cobe Spectra). Apheresis variables and cell counts were determined by methods including flow cytometry.
RESULTS
The duration of apheresis ranged from 120 minutes (Amicus, Optia) to 275 minutes (Therakos). Mononuclear cell (MNC) counts in the treatment bags were comparable between offline ECP methods (median, 57x10(8) - 66x10(8)) and lower for online ECP (14x10(8)). CD16+ monocytes were abundant in online ECP (82%) but rarer in offline ECP (median, 14% - 19%). Hematocrit ranged from 0.1% (Therakos) to 8% (Amicus). There were no side effects in any patients.
DISCUSSION
All offline ECP systems studied yielded comparable cellular compositions and highly enriched populations of MNCs. In contrast, white blood cells from online ECP displayed enrichment of nonclassical monocytes. The relevance of these findings is unknown as there is no established biomarker to predict the therapeutic efficacy of these procedures
Antioxidant power as a quality control marker for completeness of amotosalen and ultraviolet A photochemical treatments in platelet concentrates and plasma units
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