Donor‐dependent aging of young and old red blood cell subpopulations: Metabolic and functional heterogeneity. Issue 11 (19th August 2020)

• Record Type: Journal Article
• Authors: Mykhailova, Olga; Olafson, Carly; Turner, Tracey R.; DʼAlessandro, Angelo; Acker, Jason P.
• Is Part Of: Transfusion. Volume 60:Issue 11(2020)
• Page Start: 2633
• Page End: 2646
• Publication Date: 2020-08-19
• Subjects: RBC metabolomics -- RBC morphology -- RBC senescence -- RBC storage lesion -- young and old RBCs; Hematology -- Periodicals; Blood -- Transfusion -- Periodicals; Blood Group Antigens -- Periodicals; Blood Preservation -- Periodicals; Blood Transfusion -- Periodicals; 615
• DOI: 10.1111/trf.16017
• Languages: English
• ISSNs: 0041-1132

Abstract

Abstract: Background: Characteristics of red blood cells (RBCs) are influenced by donor variability. This study assessed quality and metabolomic variables of RBC subpopulations of varied biologic age in red blood cell concentrates (RCCs) from male and female donors to evaluate their contribution to the storage lesion. Study Design and Methods: Red blood cell concentrates from healthy male (n = 6) and female (n = 4) donors were Percoll separated into less dense ("young", Y‐RCCs) and dense ("old", O‐RCCs) subpopulations, which were assessed weekly for 28 days for changes in hemolysis, mean cell volume (MCV), hemoglobin concentration (MCHC), hemoglobin autofluorescence (HGB), morphology index (MI), oxygen affinity (p50), rigidity, intracellular reactive oxygen species (ROS), calcium ([Ca 2+ ]), and mass spectrometry–based metabolomics. Results: Young RCCs having disc‐to‐discoid morphology showed higher MCV and MI, but lower MCHC, HGB, and rigidity than O‐RCCs, having discoid‐to‐spheroid shape. By Day 14, Y‐RCCs retained lower hemolysis and rigidity and higher p50 compared to O‐RCCs. Donor sex analyses indicated that females had higher MCV, HGB, ROS, and [Ca 2+ ] and lower hemolysis than male RBCs, in addition to having a decreased rate of change in hemolysis by Day 28. Metabolic profiling indicated a significant sex‐related signature across all groups with increased markers of high membrane lipid remodeling and antioxidant capacity in Y‐RCCs, whereas O‐RCCs had increased markers of oxidative stress and decreased coping capability. Conclusion: The structural, functional, and metabolic dissimilarities of Y‐RCCs and O‐RCCs from female and male donors demonstrate RCC heterogeneity, where RBCs from females contribute less to the storage lesion and age slower than males. Abstract : See editorial on page 2464–2465, in this issue