Progressive oxidation of cytoskeletal proteins and accumulation of denatured hemoglobin in stored red cells

AG Kriebardis, MH Antonelou… - Journal of cellular …, 2007 - Wiley Online Library
AG Kriebardis, MH Antonelou, KE Stamoulis, E Economou‐Petersen, LH Margaritis
Journal of cellular and molecular medicine, 2007Wiley Online Library
Red blood cell (RBC) membrane proteins undergo progressive pathological alterations
during storage. In conditions of increased cellular stress, the cytoskeleton also sustains
certain modifications. The hemoglobin (Hb) content and oxidative status of the RBC
cytoskeletons as a function of the storage period remain unclear. The possible Hb content
and oxidative alterations occurring in the cytoskeletons in the course of storage were
monitored in six units, by means of electrophoresis, immunoblotting and protein …
Abstract
Red blood cell (RBC) membrane proteins undergo progressive pathological alterations during storage. In conditions of increased cellular stress, the cytoskeleton also sustains certain modifications. The hemoglobin (Hb) content and oxidative status of the RBC cytoskeletons as a function of the storage period remain unclear. The possible Hb content and oxidative alterations occurring in the cytoskeletons in the course of storage were monitored in six units, by means of electrophoresis, immunoblotting and protein carbonylation assays. A proportion of the ghost‐bound Hb consists of non‐reducible crosslinkings of probably oxidized(denatured Hb or hemichromes.The defective Hb‐membrane association was strongly affected by the prolonged storage. A progressive accumulation of Hb monomers, multimers and high molecular weight aggregates to corresponding cytoskeletons were also evident. The oxidative index of the cytoskeletal proteins was found increased, signalizing oxidative modifications in spectrin and possibly other cytoskeletal proteins. The reported data corroborate the evidence for oxidative damage in membrane proteins with emphasis to the cytoskeletal components. They partially address the pathophysiological mechanisms underlying the RBC storage lesion, add some new insight in the field of RBC storage as a hemoglobin‐ and cytoskeleton‐associated pathology and suggest the possible use of antioxidants in the units intended for transfusion.
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