Transfusion is a specific cause of acute kidney injury (AKI) after cardiac surgery. Whether there is an association between the composition of blood products and the onset of AKI is unknown. The present study suggests that the transfusion of packed red blood cells containing a high amount of myeloid-related protein 14 (MRP_14) could increase the incidence of AKI after cardiac surgery. In a mouse model, MRP_14 increased the influx of neutrophils in the kidney after ischemia-reperfusion and their ability to damage tubular cells. Higher concentrations of MRP_14 were found in packed red blood cells from female donors or prepared by whole blood filtration.
Keywords: AKI, acute kidney injury; CPB, cardiopulmonary bypass; IRI, ischemia-reperfusion injury; MPO, myeloperoxidase; MRP_14, myeloid-related protein 14; PRBC, packed red blood cells; acute kidney injury; cardiac surgery; neutrophils; packed red blood cells; transfusion; transfusion safety; trogocytosis.
© 2022 The Authors.