Bioactive lipids accumulate in stored red blood cells despite leukoreduction: a targeted metabolomics study

Transfusion - Tập 56 Số 10 - Trang 2560-2570 - 2016
Xiaoyun Fu1,2, Jacob R. Felcyn1, Katherine Odem‐Davis1, James C. Zimring1,3,2
1Bloodworks Northwest Research Institute
2School of Medicine, Department of Internal Medicine, Division of Hematology, University of Washington
3Department of Laboratory Medicine, University of Washington School of Medicine, Seattle, Washington.

Tóm tắt

BACKGROUNDAccumulation of bioactive lipids during red blood cell (RBC) storage has been identified as a potential source of posttransfusion sequelae in vulnerable populations. Typically, white blood cells (WBCs) have been implicated in the generation of bioactive lipids, and leukoreduction has been seen as a solution to this issue.STUDY DESIGN AND METHODSWe developed a targeted metabolomics approach with isotope dilution to quantify a panel of bioactive lipids in both leukoreduced (LR) and nonleukoreduced (NLR) RBC units over the course of storage.RESULTSLeukoreduction greatly attenuated the production of 12‐hydroxyeicosatetraenoic acid (HETE), 12‐hydroxyeicosapentaenoic acid, and 14‐hydroxydocosahexaenoic acid (HDoHE), all three of which are mediated by 12‐lipoxygenase present in WBCs and platelets. However, despite leukoreduction, micromolar levels of linoleic acid (LA), arachidonic acid (AA), and docosahexaenoic acid (DHA) were observed in the RBC units stored for 42 days. These major polyunsaturated fatty acids (PUFAs) and their oxidation products (oxylipins) also significantly increased with storage time, including 5‐, 8‐, 9‐, 11‐, 12‐, and 15‐ HETEs from AA; 9‐ and 13‐hydroxyoctadecadienoic acid (HODE); 9‐, 10‐, and 12,13‐dihydroxyoctadecenoic acids from LA; and 14‐, 16‐, and 17‐HDoHEs from DHA. The majority of PUFAs and oxylipins accumulated in the supernatant fraction. Large donor‐to‐donor variations were observed in both LR‐RBC and NLR‐RBC units.CONCLUSIONWhile the exact role the accumulation of PUFAs and oxylipins plays in RBC unit quality and transfusion medical outcomes remains undetermined, the analytes of interest in this study may serve as biomarkers for lipid degradation and oxidation during storage and may induce changes in human physiology upon transfusion.

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Transfusion

Tập 56 Số 10

2560-2570

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