title: Expression of transcription factors during megakaryocytic differentiation of CD34+ cells from human cord blood induced by thrombopoietin.
abstract: Although normal megakaryocytic development has been shown to require the presence of functional GATA-1 and NF-E2 transcription factors in vivo, the roles of other members of the GATA binding factors and NF-E2 family during megakaryocytic differentiation are unclear. the present study, the expression of GATA family members, GATA-1 and GATA-2, a GATA-binding factor, EVI-1, the large subunit of NF-E2 factor, p45 and the related factors, Nrf1, Nrf2, Nrf3, BACH1, BACH2, and the small subunit of NF-E2, MAFK and MAFG has been examined in human megakaryocytic and erythroid cells by reverse transcriptase-polymerase chain reaction. CD34+ cells isolated from human cord blood were induced to unilineage megakaryocytic or erythroid differentiation in liquid suspension culture in the presense of thrombopoietin or erythropoietin, respectively. Each lineage was identified by monoclonal antibody against GPIIb/IIIa or glycophorin A. In megakaryocytic culture, p45, Nrf1, Nrf2, BACH1, MAFK and MAFG mRNAs were induced similarly to erythroid culture. Nrf3 mRNA was barely detected in both cultures. BACH2 was induced only in megakaryocytic culture, although the level of expression was low. Furthermore, the profiles of transcription factors involved in hematopoiesis, EVI-1 and Ets-1 mRNAs were induced only in megakaryocytic culture. Megakaryocytic and erythroid differentiation pathways are closely related to each other, and these two lineage cells share a number of lineage-specific transcription factors. However, the results showed that the profile of the expression of these transcription factors in megakaryocytic cells is distinct from that of erythroid lineage. The dynamic changes in the levels of different transcription factors that occur during primary megakaryocytic differentiation suggest that the levels of these factors may influence the progression to specific hematopoietic pathways.
authors: Department of Pediatrics, Hirosaki University School of Medicine, Japan.
authors: K
authors: K
authors: Terui
authors: Y
authors: Y
authors: Takahashi
authors: J
authors: J
authors: Kitazawa
authors: T
authors: T
authors: Toki
authors: M
authors: M
authors: Yokoyama
authors: E
authors: E
authors: Ito
mesh_terms: D018952:Antigens, CD34; D050976:Basic-Leucine Zipper Transcription Factors; D002454:Cell Differentiation; D019070:Cell Lineage; D002478:Cells, Cultured; D004268:DNA-Binding Proteins / Q000235:genetics; D050981:Erythroid-Specific DNA-Binding Factors; D051856:Fanconi Anemia Complementation Group Proteins; D005312:Fetal Blood; D050982:GATA1 Transcription Factor; D050989:GATA2 Transcription Factor; D015870:Gene Expression; D006801:Humans; D000074008:MDS1 and EVI1 Complex Locus Protein; D051259:MafG Transcription Factor; D050985:MafK Transcription Factor; D008533:Megakaryocytes / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D050983:NF-E2 Transcription Factor; D050984:NF-E2 Transcription Factor, p45 Subunit; D051267:NF-E2-Related Factor 2; D009687:Nuclear Proteins / Q000235:genetics; D051266:Nuclear Respiratory Factor 1; D051264:Nuclear Respiratory Factors; D050784:Proto-Oncogene Protein c-ets-1; D011518:Proto-Oncogene Proteins / Q000235:genetics; D050783:Proto-Oncogene Proteins c-ets; D011519:Proto-Oncogenes; D012333:RNA, Messenger; D012097:Repressor Proteins / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013926:Thrombopoietin / Q000494:pharmacology*; D015534:Trans-Activators / Q000235:genetics; D014157:Transcription Factors / Q000235:genetics*
chemical_list: D018952:Antigens, CD34; C102108:BACH1 protein, human; C491123:BACH2 protein, human; C486316:Bach1 protein, mouse; D050976:Basic-Leucine Zipper Transcription Factors; D004268:DNA-Binding Proteins; C494041:ETS1 protein, human; D050981:Erythroid-Specific DNA-Binding Factors; C494042:Ets1 protein, mouse; D051856:Fanconi Anemia Complementation Group Proteins; D050982:GATA1 Transcription Factor; C494688:GATA1 protein, human; D050989:GATA2 Transcription Factor; C494711:GATA2 protein, human; C103944:MAFG protein, human; C494695:MAFK protein, human; D000074008:MDS1 and EVI1 Complex Locus Protein; C063575:MECOM protein, human; D051259:MafG Transcription Factor; D050985:MafK Transcription Factor; C491247:Mafg protein, mouse; D050983:NF-E2 Transcription Factor; D050984:NF-E2 Transcription Factor, p45 Subunit; D051267:NF-E2-Related Factor 2; C494692:NFE2 protein, human; C495635:NFE2L2 protein, human; C117963:NFE2L3 protein, human; C495633:NRF1 protein, human; D009687:Nuclear Proteins; D051266:Nuclear Respiratory Factor 1; D051264:Nuclear Respiratory Factors; D050784:Proto-Oncogene Protein c-ets-1; D011518:Proto-Oncogene Proteins; D050783:Proto-Oncogene Proteins c-ets; D012333:RNA, Messenger; D012097:Repressor Proteins; D015534:Trans-Activators; D014157:Transcription Factors; D013926:Thrombopoietin