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- W2011305479 abstract "Adult bone marrow (BM) erythrocyte colony-forming units (CFU-Es) are important cellular targets for the treatment of anemia and also for the manufacture of red blood cells (RBCs) ex vivo. We obtained quantitative biochemical measurements from single and small numbers of CFU-Es by isolating and analyzing c-Kit(+)CD71(high)Ter119(-) cells from adult mouse BM and this allowed us to identify two mechanisms that can be manipulated to increase RBC production. As expected, maximum RBC output was obtained when CFU-Es were stimulated with a combination of Stem Cell Factor (SCF) and Erythropoietin (EPO) mainly because SCF supports a transient CFU-E expansion and EPO promotes the survival and terminal differentiation of erythroid progenitors. However, we found that one of the main factors limiting the output in RBCs was that EPO induces a downregulation of c-Kit expression which limits the transient expansion of CFU-Es. In the presence of SCF, the EPO-mediated downregulation of c-Kit on CFU-Es is delayed but still significant. Moreover, treatment of CFU-Es with 1-Naphthyl PP1 could partially inhibit the downregulation of c-Kit induced by EPO, suggesting that this process is dependent on a Src family kinase, v-Src and/or c-Fyn. We also found that CFU-E survival and proliferation was dependent on the level of time-integrated extracellular-regulated kinase (ERK) activation in these cells, all of which could be significantly increased when SCF and EPO were combined with mouse fetal liver-derived factors. Taken together, these results suggest two novel molecular strategies to increase RBC production and regeneration." @default.
- W2011305479 created "2016-06-24" @default.
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- W2011305479 date "2013-01-01" @default.
- W2011305479 modified "2023-09-27" @default.
- W2011305479 title "Biochemical measurements on single erythroid progenitor cells shed light on the combinatorial regulation of red blood cell production" @default.
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- W2011305479 doi "https://doi.org/10.1039/c2mb25348h" @default.
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