Marleen Straat1, Anita N Böing2, Anita Tuip-De Boer3, Rienk Nieuwland2, Nicole P Juffermans1. 1. Department of Intensive Care Medicine, Academic Medical Center, Amsterdam, The Netherlands; Laboratory of Experimental Intensive Care and Anesthesiology, Academic Medical Center, Amsterdam, The Netherlands. 2. Laboratory of Experimental Clinical Chemistry, Academic Medical Center, Amsterdam, The Netherlands. 3. Laboratory of Experimental Intensive Care and Anesthesiology, Academic Medical Center, Amsterdam, The Netherlands.
Abstract
BACKGROUND: Transfusion of red blood cells (RBCs) is associated with adverse outcome, but the causative factor is unknown. Extracellular vesicles (EVs) have pro-inflammatory properties. We hypothesized that EVs released from both fresh and stored RBC products can induce a host inflammatory response in a dose-dependent manner. METHODS: Whole blood was incubated with supernatant from RBC units stored for different time periods, either containing (different numbers of) EVs or depleted from EVs. RESULTS: Incubation with both fresh and stored supernatant containing EVs induced a strong host response with production of TNF, IL-6 and IL-8. In supernatant depleted from EVs, this host response was completely abrogated. IL-10 levels were not affected. EV-induced host response was both dependent on the number of EVs as well as on storage time. CONCLUSIONS: EVs from both fresh and stored RBC units illicit a strong inflammatory host response in recipients and may therefore contribute to adverse outcome of RBC transfusion.
BACKGROUND: Transfusion of red blood cells (RBCs) is associated with adverse outcome, but the causative factor is unknown. Extracellular vesicles (EVs) have pro-inflammatory properties. We hypothesized that EVs released from both fresh and stored RBC products can induce a host inflammatory response in a dose-dependent manner. METHODS: Whole blood was incubated with supernatant from RBC units stored for different time periods, either containing (different numbers of) EVs or depleted from EVs. RESULTS: Incubation with both fresh and stored supernatant containing EVs induced a strong host response with production of TNF, IL-6 and IL-8. In supernatant depleted from EVs, this host response was completely abrogated. IL-10 levels were not affected. EV-induced host response was both dependent on the number of EVs as well as on storage time. CONCLUSIONS: EVs from both fresh and stored RBC units illicit a strong inflammatory host response in recipients and may therefore contribute to adverse outcome of RBC transfusion.
Entities:
Keywords:
Cytokines; Extracellular vesicles; Host response; Red blood cell units
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