During EPO or anemia challenge , erythroid progenitor cells transit through a selectively expandable proerythroblast pool Running title : Transitional erythroblast sub - stages
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During EPO or anemia challenge, erythroid progenitor cells transit through a selectively expandable proerythroblast pool.
Investigations of bone marrow (BM) erythroblast development are important for clinical concerns but are hindered by progenitor cell and tissue availability. We therefore sought to more specifically define dynamics, and key regulators, of the formation of developing BM erythroid cell cohorts. A unique Kit(-)CD71(high)Ter119(-) "stage E2" proerythroblast pool first is described, which (unlike its...
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Anemia as associated with numerous clinical conditions can be debilitating, but frequently can be treated via administration of epoetin-alfa, darbepoietin-alfa or methoxy-PEG epoetin-beta. Despite the complexity of EPO-EPO receptor interactions, the development of interesting EPO mimetic peptides (EMPs) also has been possible. CNTO 530 is one such novel MIMETIBODY TM Fc-domain dimeric EMP fusio...
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The abundance and stability of erythropoietin (EPO) receptor mRNA was measured in Friend virus-infected mouse splenic erythroblast (FVA) cells. FVA cells correspond to the colony-forming unit-erythroid (CFU-E) and cluster-forming unit-erythroid stages of differentiation and they mature in vitro into reticulocytes during 45 to 60 hours of culture. After 20 hours, there was a rapid decline in the...
متن کاملAttenuation of EPO-dependent erythroblast formation by death-associated protein kinase-2.
The adult erythron is maintained via dynamic modulation of erythroblast survival potentials. Toward identifying novel regulators of this process, murine splenic erythroblasts at 3 developmental stages were prepared, purified and profiled. Stage-to-stage modulated genes were then functionally categorized, with a focus on apoptotic factors. In parallel with BCL-X and NIX, death-associated protein...
متن کاملSpry1 as a novel regulator of erythropoiesis, EPO/EPOR target, and suppressor of JAK2.
Sprouty proteins are established modifiers of receptor tyrosine kinase (RTK) signaling and play important roles in vasculogenesis, bone morphogenesis, and renal uteric branching. Little is understood, however, concerning possible roles for these molecular adaptors during hematopoiesis. Within erythroid lineage, Spry1 was observed to be selectively and highly expressed at CFU-e to erythroblast s...
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