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- W2753112666 abstract "BACKGROUND Although transfusion is a lifesaving intervention, it may be associated with significant morbidity in injured patients. We hypothesize that stored red blood cells (RBCs) induce proinflammatory activation of human pulmonary microvascular endothelial cells (HMVECs) resulting in neutrophil (PMN) adhesion and predisposition to acute lung injury (ALI). STUDY DESIGN AND METHODS Ten units of RBCs were collected; 50% (by weight) were leukoreduced (LR‐RBCs) and the remainder was unmodified and stored in additive solution‐5 (AS‐5). An additional 10 units of RBCs were collected, leukoreduced, and stored in AS‐3. HMVECs were incubated with [10%‐40%] FINAL of the supernatants on Day (D)1 to D42 of storage, lipid extracts, and purified lipids. Endothelial surface expression of intercellular adhesion molecule‐1 (ICAM‐1), interleukin (IL)‐8 release, and PMN adhesion to HMVECs were measured. HMVEC signaling via the BLT2 receptor was evaluated. Supernatants and lipids were also employed as the first event in a two‐event model of ALI. RESULTS The supernatants [10%‐40%] FINAL from D21 LR‐RBCs and D42 RBCs and LR‐RBCs and the lipids from D42 stored in AS‐5 induced increased ICAM‐1 surface expression on endothelium, IL‐8 release, and PMN adhesion. In addition, the supernatants [20%‐40%] FINAL from D21 and D42 RBCs in AS‐5 also increased endothelial surface expression of ICAM‐1. D42 supernatants and lipids also caused coprecipitation of β‐arrestin‐1 with BLT2, protein kinase C (PKC)β I , and PKCδ and served as the first event in a two‐event rodent model of ALI. CONCLUSION Lipids that accumulate during RBC storage activate endothelium and predispose to ALI, which may explain some of the adverse events associated with the transfusion of critically injured patients." @default.
- W2753112666 created "2017-09-15" @default.
- W2753112666 creator A5004545352 @default.
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- W2753112666 date "2017-09-06" @default.
- W2753112666 modified "2023-09-27" @default.
- W2753112666 title "Supernatants and lipids from stored red blood cells activate pulmonary microvascular endothelium through the BLT2 receptor and protein kinase C activation" @default.
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