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Induction of hemoglobin synthesis by downregulation of MYB protein with an antisense oligodeoxynucleotide

YJ Chern, C O'Hara and AJ Sytkowski

Department of Medicine, New England Deaconess Hospital, Harvard Medical School, Boston, MA.

Reduced expression of the proto-oncogene c-myb appears necessary for erythroid differentiation induced by chemical agents and by the natural regulator, erythropoietin (Epo). Treatment of Epo-responsive Rauscher erythroleukemia cells with an anti-sense oligodeoxynucleotide to c-myb in the absence of other inducers downregulated myb protein markedly and caused hemoglobinization of the cells within 48 hours. Epo treatment, which downregulates c-myb in these cells, induced hemoglobinization to the same degree. Epo also induced the appearance of anion transport protein on the plasma membrane, consistent with terminal differentiation. In contrast, antisense c-myb did not induce this erythroid marker. The results are consistent with a role for myb protein in the regulation of hemoglobin synthesis.

Volume 78, Issue 4, pp. 991-996, 08/15/1991
Copyright © 1991 by The American Society of Hematology


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  Copyright © 1991 by American Society of Hematology         Online ISSN: 1528-0020