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- W2099173677 abstract "Abstract Background: In peripheral blood, chemotaxis, phagocytosis, and oxidative burst of polymorphonuclear cells (PMNs) can be assessed by flow cytometry, whereas function tests, i.e., quality control in PMN concentrates designed for neutropenia therapy, are lacking. Methods: PMN concentrates (n=6) harvested from healthy donors who had been premedicated with granulocyte colony-stimulating factor (G-CSF) and dexamethasone were stored undiluted (control, C; n=6) and diluted 1:4 (D; n=6) with autologous plasma for 72h. Commercial flow cytometry function tests were performed to quantify changes in chemotaxis, phagocytosis, and oxidative burst of PMNs over time. Results: Median levels of phagocytosis and oxidative burst levelled at 86% (82–94) and 98% (83–100) in C on the day of apheresis, respectively, but deteriorated to 15% (0–24) and 0% within 72h; in D these parameters remained close to 90%. Median levels of chemotaxis were comparable in C (69%, 65–74) and D (74%, 70–84) at baseline. No migration was detected in C after 72h; however, D retained approximately 63% (13–76) migration capacity. Conclusion: Quality control in PMN concentrates is practical using flow cytometry and commercial test kits. While phagocytosis and oxidative burst may be maintained for 72h in vitro, chemotaxis of apheresed PMNs is already reduced on the day of apheresis." @default.
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- W2099173677 date "2005-01-01" @default.
- W2099173677 modified "2023-09-25" @default.
- W2099173677 title "Quality control in neutrophil granulocyte (PMN) concentrates by flow cytometry" @default.
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- W2099173677 doi "https://doi.org/10.1515/cclm.2005.129" @default.
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