OBJECTIVE: The aim of this study was to investigate the expression pattern of CD55 and CD59 on red blood cells (RBCs) in anemic chronic kidney disease (CKD) patients, and factors that might influence their expression. SUBJECTS AND METHODS: Nighty-one adult anemic CKD patients and 80 healthy controls (HCs) were enrolled. Anemic CKD patients were divided into 3 subgroups based on receiving erythropoietin and renal replacement therapies. Flow cytometric analysis of CD55 and CD59 expression was performed on RBCs from blood samples obtained from CKD patients and HCs. RESULTS: CD59 deficiency was significantly higher among CKD patients than HCs (n = 68, 74.7%, vs. n = 13, 16.3%, respectively; p < 0.001). The median proportions of CD55- and CD59-deficient RBCs in CKD patients were significantly higher compared to HCs (0.34 vs. 0.15, and 4.3 vs. 2.0, p < 0.001 and p < 0.001, respectively). The mean fluorescence intensity (MFI) of CD55 and CD59 expression was significantly lower in CKD patients compared to HCs (1.2 vs. 2.8, and 17.0 vs. 20.3, p < 0.04 and p < 0. 001, respectively). The hemoglobin level was inversely correlated with the proportions of CD55- and CD59-deficient RBCs (r = -0.37, p < 0.001, and r = -0.22, p < 0.02, respectively). The number of CD59-deficient patients was significantly different between the 3 subgroups of CKD patients (p = 0.001), and a significant difference was present in the MFI of CD55 and CD59 expression among the 3 subgroups (p = 0.04 and p = 0.03, respectively). CONCLUSION: The expression pattern of CD55 and CD59 on RBCs is altered in anemic CKD patients, which could play a role in the pathogenesis of anemia in CKD.
OBJECTIVE: The aim of this study was to investigate the expression pattern of CD55 and CD59 on red blood cells (RBCs) in anemic chronic kidney disease (CKD) patients, and factors that might influence their expression. SUBJECTS AND METHODS: Nighty-one adult anemic CKDpatients and 80 healthy controls (HCs) were enrolled. Anemic CKDpatients were divided into 3 subgroups based on receiving erythropoietin and renal replacement therapies. Flow cytometric analysis of CD55 and CD59 expression was performed on RBCs from blood samples obtained from CKDpatients and HCs. RESULTS:CD59 deficiency was significantly higher among CKDpatients than HCs (n = 68, 74.7%, vs. n = 13, 16.3%, respectively; p < 0.001). The median proportions of CD55- and CD59-deficient RBCs in CKDpatients were significantly higher compared to HCs (0.34 vs. 0.15, and 4.3 vs. 2.0, p < 0.001 and p < 0.001, respectively). The mean fluorescence intensity (MFI) of CD55 and CD59 expression was significantly lower in CKDpatients compared to HCs (1.2 vs. 2.8, and 17.0 vs. 20.3, p < 0.04 and p < 0. 001, respectively). The hemoglobin level was inversely correlated with the proportions of CD55- and CD59-deficient RBCs (r = -0.37, p < 0.001, and r = -0.22, p < 0.02, respectively). The number of CD59-deficientpatients was significantly different between the 3 subgroups of CKDpatients (p = 0.001), and a significant difference was present in the MFI of CD55 and CD59 expression among the 3 subgroups (p = 0.04 and p = 0.03, respectively). CONCLUSION: The expression pattern of CD55 and CD59 on RBCs is altered in anemic CKDpatients, which could play a role in the pathogenesis of anemia in CKD.
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