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• W1566263009 abstract "Abstract Interferons have the ability to enhance or diminish the expression of specific genes and have been shown to affect the proliferation of certain cells. Here, the effect of gamma-interferon on fetal hemoglobin synthesis by purified cord blood, fetal liver, and adult bone marrow erythroid progenitors was studied with a radioligand assay to measure hemoglobin production by BFU-E-derived erythroblasts. Coculture with recombinant gamma-interferon resulted in a significant and dose- dependent decrease in fetal hemoglobin production by neonatal and adult, but not fetal, BFU-E-derived erythroblasts. Accumulation of fetal hemoglobin by cord blood BFU-E-derived erythroblasts decreased up to 38.1% of control cultures (erythropoietin only). Synthesis of both G gamma/A gamma globin was decreased, since the G gamma/A gamma ratio was unchanged. Picograms fetal hemoglobin per cell was decreased by gamma- interferon addition, but picograms total hemoglobin was unchanged, demonstrating that a reciprocal increase in beta-globin production occurred in cultures treated with gamma-interferon. No toxic effect of gamma-interferon on colony growth was noted. The addition of gamma- interferon to cultures resulted in a decrease in the percentage of HbF produced by adult BFU-E-derived cells to 45.6% of control. Fetal hemoglobin production by cord blood, fetal liver, and adult bone marrow erythroid progenitors, was not significantly affected by the addition of recombinant GM-CSF, recombinant interleukin 1 (IL-1), recombinant IL- 2, or recombinant alpha-interferon. Although fetal progenitor cells appear unable to alter their fetal hemoglobin program in response to any of the growth factors added here, the interaction of neonatal and adult erythroid progenitors with gamma-interferon results in an altered expression of globin genes. This supports the concept that developmental globin gene switching can be regulated by environmental factors." @default.
• W1566263009 created "2016-06-24" @default.
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• W1566263009 date "1987-06-01" @default.
• W1566263009 modified "2023-09-27" @default.
• W1566263009 title "Gamma-interferon alters globin gene expression in neonatal and adult erythroid cells" @default.
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• W1566263009 doi "https://doi.org/10.1182/blood.v69.6.1674.1674" @default.
• W1566263009 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/2437981" @default.
• W1566263009 hasPublicationYear "1987" @default.
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