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- W4253458633 abstract "To investigate erythropoiesis in paroxysmal nocturnal hemoglobinuria (PNH), we studied the expression of glycosylphosphatidylinositol (GPI)-anchored membrane proteins on circulating erythrocytes and erythroblasts obtained by erythropoietic cell culture in nine patients with this disease. One-color and two-color flow cytometric analyses were performed using monoclonal antibodies for decay-accelerating factor (DAF ) and/or CD59/membrane attack complex-inhibitory factor (MACIF). In addition, terminal deoxynucleotidyl transferase–mediated dUTP-biotin nick end-labeling (TUNEL) analysis was performed to assess apoptosis of erythroblasts from six patients. On flow cytometric analysis, cases 1 to 6 had positive and negative erythrocyte populations, case 7 intermediate and negative populations, case 8 positive, intermediate, and negative populations, and case 9 a single double-negative population. In addition, cases 1 to 6 and 8 had positive, intermediate, and negative erythroblast populations, while cases 7 and 9 had intermediate and negative populations. The percentage of double-negative erythrocytes showed a significant correlation with that of double-negative erythroblasts (r = .741, P < .05). In seven of nine patients, more erythroblasts than erythrocytes were negative for the two membrane proteins. Also, some patients with an intermediate population of erythrocytes did not necessarily show an increase of PNH II erythroblasts. Apoptosis of PNH erythroblasts was also detected, but the percentage of apoptotic cells in PNH patients showed no difference from that in healthy volunteers. These findings suggest that the final phenotype of mature erythrocytes in PNH is determined during maturation from erythroblasts to erythrocytes by the disappearance or persistence of PNH II erythroblasts. In addition, PNH erythroblasts in vitro may be partly lost by apoptosis, but apoptosis does not play an important role in determining GPI-linked protein expression." @default.
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- W4253458633 date "1997-07-01" @default.
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- W4253458633 title "Relationship Between the Phenotypes of Circulating Erythrocytes and Cultured Erythroblasts in Paroxysmal Nocturnal Hemoglobinuria" @default.
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- W4253458633 doi "https://doi.org/10.1182/blood.v90.1.435.435_435_443" @default.
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