title: Rescue of erythroid development in gene targeted GATA-1- mouse embryonic stem cells.
abstract: Development of definitive (fetal liver-derived) red cells is blocked by a targeted mutation in the gene encoding the transcription factor GATA-1. We used in vitro differentiation of GATA-1- mouse embryonic stem (ES) cells to reveal a requirement for GATA-1 during primitive (yolk sac-derived) erythropoiesis and to establish a rescue assay. We show that the block to development includes primitive, as well as definitive, erythroid cells and is complete at the level of globin RNA expression; that the introduction of a normal GATA-1 gene restores developmental potential both in vivo and in vitro; and that efficient rescue is dependent on a putative autoregulatory GATA-motif in the distal promoter. Use of in vitro differentiated ES cells bridges a gap between conventional approaches to gene function in cell lines and analysis of loss of function mutations in the whole animal.
authors.affiliation: Division of Hematology-Oncology, Children's Hospital, Boston, Massachusetts.
authors.forename: M C
authors.initials: MC
authors.lastname: Simon
authors.forename: L
authors.initials: L
authors.lastname: Pevny
authors.forename: M V
authors.initials: MV
authors.lastname: Wiles
authors.forename: G
authors.initials: G
authors.lastname: Keller
authors.forename: F
authors.initials: F
authors.lastname: Costantini
authors.forename: S H
authors.initials: SH
authors.lastname: Orkin
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000235:genetics; D002478:Cells, Cultured; D004268:DNA-Binding Proteins / Q000235:genetics*; D004622:Embryo, Mammalian / Q000166:cytology; D050981:Erythroid-Specific DNA-Binding Factors; D004920:Erythropoiesis / Q000235:genetics*; D050982:GATA1 Transcription Factor; D006801:Humans; D051379:Mice; D009154:Mutation; D013234:Stem Cells / Q000166:cytology*; D014157:Transcription Factors / Q000235:genetics*; D014162:Transfection
chemical_list: D004268:DNA-Binding Proteins; D050981:Erythroid-Specific DNA-Binding Factors; D050982:GATA1 Transcription Factor; C494688:GATA1 protein, human; C494689:Gata1 protein, mouse; D014157:Transcription Factors