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. 1972 Dec;69(12):3575–3579. doi: 10.1073/pnas.69.12.3575

Globin Messenger RNA Activity in Erythroid Precursor Cells and the Effect of Erythropoietin

Masaaki Terada 1,2, Linda Cantor 1,2, Salvatore Metafora 1,2, Richard A Rifkind 1,2, Arthur Bank 1,2, Paul A Marks 1,2
PMCID: PMC389824  PMID: 4509317

Abstract

Cell populations enriched for erythroid precursor cells were fractionated from 13-day fetal-mouse livers by a method of immune hemolysis. These preparations of precursors, contaminated by less than 7% hemoglobinized erythroblasts, synthesize globin at a rate less than 6% that of the unfractionated liver erythroid cell population. RNA was isolated from these precursor cells and assayed for globin mRNA activity in a cell-free system from Krebs ascites tumor. The 6-16S RNA fraction from precursor cells has less than 5% of the globin mRNA activity of RNA isolated from unfractionated populations. Precursor cells incubated with erythropoietin show an increment in the rate of synthesis of globin only after 5-10 hr of incubation. After 10 hr of culture with this hormone, precursor cells show a 6- to 10-fold increase in globin mRNA activity. These results suggest that the precursor cells of hepatic erythropoiesis, responsive to erythropoietin, do not contain globin mRNA in a biologically active form. Erythropoietin-induced differentiation of these cells to erythroblasts is associated with an increase in globin mRNA.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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