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- W1575485780 abstract "Transcription factor GATA-1 is essential for erythroid cell differentiation. GATA-binding motifs have been found in the regulatory regions of various erythroid-specific genes, suggesting that GATA-1 contributes to gene regulation during the entire process of erythropoiesis. A GATA-1 germ-line mutation results in embryonic lethality due to defective primitive erythropoiesis and GATA-1-null embryonic stem cells fails to differentiate beyond the proerythroblast stage. Therefore, the precise roles of GATA-1 in the later stages of erythropoiesis could not be clarified. Under the control of a GATA-1 gene hematopoietic regulatory domain, a GATA-1 mutant lacking the N-finger domain (DeltaNF mutant) was over-expressed in mice. These mice exhibited abnormal morphology in peripheral red blood cells (RBCs), reticulocytosis, splenomegaly, and erythroid hyperplasia, indicating compensated hemolysis. These mice were extremely sensitive to phenylhydrazine (PHZ), an agent that induces hemolysis, and their RBCs were osmotically fragile. Importantly, the hemolytic response to PHZ was partially restored by the simultaneous expression of wild-type GATA-1 with the DeltaNF mutant, supporting our contention that DeltaNF protein competitively inhibits the function of endogenous GATA-1. These data provide the first in vivo evidence that the NF domain contributes to the gene regulation that is critical for differentiation and survival of mature RBCs in postnatal erythropoiesis." @default.
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- W1575485780 date "2004-12-21" @default.
- W1575485780 modified "2023-09-23" @default.
- W1575485780 title "Transgenic over-expression of GATA-1 mutant lacking N-finger domain causes hemolytic syndrome in mouse erythroid cells" @default.
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- W1575485780 doi "https://doi.org/10.1111/j.1365-2443.2005.00814.x" @default.
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