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- W2072734698 abstract "BACKGROUND: Determining reversible aspects of the platelet storage lesion may result in improved function and survival of transfused platelets. STUDY DESIGN AND METHODS: Using a model of high‐dose (apheresis‐derived) platelet concentrates (PC), functional changes imposed by transient adverse metabolic conditions (pH < 6.0 for 1‐2 hr) that could be reversed by autologous plasma rescue followed by standard platelet storage were investigated. Whole‐blood‐derived PCs were transfused into a small number of normal volunteers to determine platelet recovery and survival. RESULTS: Without rescue, high‐dose PCs developed severe in vitro functional derangements at the time of the pH nadir including 1) loss of resting morphology; 2) complete abrogation of osmotic recovery and platelet aggregation and glycoprotein IIb/IIIa up‐regulation to agonist; and 3) decreased α‐granule release. By contrast, spontaneous and agonist‐induced binding of annexin V were unaffected by adverse metabolic conditions. Plasma rescue to an optimal pH improved morphology scores, stabilized osmotic recovery, and completely restored platelet secretory responses, as measured by aggregation, glycoprotein IIb/IIIa up‐regulation, and α‐granule release. In a limited number of studies, plasma rescue was accompanied by preserved in vivo platelet recovery and survival after autologous transfusion after 5 days of storage. CONCLUSION: Transient derangement of platelet metabolism, which does not increase membrane phosphatidylserine exposure, causes in vitro functional abnormalities that are fully reversed or stabilized by metabolic rescue. Preliminary data suggest that such rescued platelets may have normal posttransfusion recovery and survival." @default.
- W2072734698 created "2016-06-24" @default.
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- W2072734698 date "2003-08-15" @default.
- W2072734698 modified "2023-10-15" @default.
- W2072734698 title "Reversibility of severe metabolic stress in stored platelets after in vitro plasma rescue or in vivo transfusion: restoration of secretory function and maintenance of platelet survival" @default.
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- W2072734698 doi "https://doi.org/10.1046/j.1537-2995.2003.00484.x" @default.
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