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• W2182784991 abstract "Various agents modulate hemoglobin synthesis. In vitro modulation of translation in hemoglobin chain synthesis was analysed in patients with congenital hemolytic anemia (n=32) and healthy controls (n=17).Enriched reticulocytes were co-incubated with (3)H-leucine and cytokines or butyrate. Reversed-phase chromatography enabled separation of alpha-, beta- and gamma-globin chains. Globin chain synthesis was calculated from measured (3)H-leucine incorporation. Transferrin, erythropoietin, interleukin-3 and interferon-gamma receptors were detected by flow cytometry. Reverse-transcription polymerase chain reaction (RT PCR) was used to demonstrate changes of RNA stability.Interleukin-3, interferon-gamma and butyrate caused a significant 2-fold increase (range 1.8-2.4; p<0.01) of the alpha- and beta-chain synthesis in congenital hemolytic anaemias. Analysis of gamma-globin chain synthesis revealed a lower, i.e. 1.4 fold increase (range 1.32 to 1.41; p<0.03). The absolute amount of globin synthesis was calculated to be 2.9 x 10(-12) g/reticulocyte/24h. After incubation with interleukin-3 the absolute additional synthesis of the alpha-globin chain reached 1.31 x 10(-12) g/reticulocyte/24h, of the beta-globin chain, 1.15 x 10(-12) g/reticulocyte/24h and of the gamma-globin chain, 0.26 x 10(-12) g/reticulocyte/24h. Butyrate and interferon-gamma had no or even an inhibiting effect on reticulocytes from normal controls, while interleukin-3 stimulated alpha- and gamma-chain synthesis (1.4 and 2.4 fold, respectively; p<0.03) suggesting an increase of fetal hemoglobin (HbF). Erythropoietin showed no stimulating influence. Membrane associated interleukin-3 receptors were detected in 0.78+/-0.14%, and interferon-gamma receptors in 0.1+/-0.015% of the red cells. Erythropoietin receptors were extremely rare (0.05+/-0.015%). The expression of transferrin receptors (CD71) correlated with the extent of globin chain stimulation. The alpha-, and beta-globin mRNA content of the reticulocytes after interleukin-3 incubation, as measured by RT-PCR, increased.Hemoglobin chain synthesis could be modulated post-transcriptionally by interleukin-3, interferon-gamma and butyrate. Transferrin receptor and globin RNA stability might be involved in this phenomenon." @default.
• W2182784991 created "2016-06-24" @default.
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• W2182784991 date "2001-08-01" @default.
• W2182784991 modified "2023-09-23" @default.
• W2182784991 title "Post-transcriptional effects of interleukin-3, interferon-gamma, erythropoietin and butyrate on in vitro hemoglobin chain synthesis in congenital hemolytic anemia." @default.
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• W2182784991 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/11522534" @default.
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