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- W2409082022 abstract "Abstract Physiologic principles underlying the differences in fetal hemoglobin (HbF) induction between acute and chronic states of erythroid expansion are poorly understood. Whereas abrupt erythroid expansion is characterized by a high proportion of reticulocytes coexpressing adult and fetal globin (F reticulocytes), HbF levels wane with chronic erythropoietic stimulation. To investigate this phenomenon, we used various schedules of erythropoietin (epo) administration in primates. Acute intravenous epo administration promoted a 2- to 10-fold preferential induction of F reticulocytes compared with total reticulocytes. Total reticulocyte and F reticulocyte production were significantly correlated (correlation coefficient .41 to .74). With chronic epo administration, preferential F reticulocyte production was lost, and there was no correlation between reticulocyte and F reticulocyte production (correlation coefficient -.03). The mean percentage of F reticulocytes did not change between acute and chronic schedules of epo administration. The subcutaneous route of high-dose (3,000 U/kg) epo administration was as effective as intravenous administration in the induction of HbF. Reticulocyte and F reticulocyte responses to increasing epo doses were found to be saturable. These results suggest that the kinetics rather than absolute levels of reticulocyte and F reticulocyte response form the basis for preferential F reticulocyte induction with acute erythropoietic stimulation, and they support the hypothesis that F reticulocytes arise from a relatively rapid pathway of erythroid maturation." @default.
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- W2409082022 date "1993-01-01" @default.
- W2409082022 modified "2023-09-29" @default.
- W2409082022 title "Fetal hemoglobin in acute and chronic states of erythroid expansion" @default.
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- W2409082022 doi "https://doi.org/10.1182/blood.v81.1.227.227" @default.
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