Haploinsufficiency of Runx1 results in the acceleration of mesodermal development and hemangioblast specification upon in vitro differentiation of ES cells

Georges Lacaud, Valerie Kouskoff, Anne Trumble, Staci Schwantz, Gordon Keller

Research output: Contribution to journalArticlepeer-review

Abstract

The AML1 gene (recently renamed Runx1), which encodes the DNA-binding subunit of a transcription factor of the core binding factor (CBF) family, is required for the establishment of definitive hematopoiesis. We have previously demonstrated that Runx1 is expressed in yolk sac mesodermal cells prior to the establishment of the blood islands and in the embryoid body (EB)-derived blast-colony-forming cells (BL-CFCs), the in vitro equivalent of the hemangioblast. Analysis of Runx1-deficient embryonic stem (ES) cells demonstrated that this gene is essential for the generation of normal numbers of blast colonies, the progeny of the BL-CFCs. In the present study, we analyzed the potential of Runx1+/- ES cells to determine if heterozygosity at the Runx1 locus impacts early developmental events leading to the commitment of the BL-CFCs. Our results indicate that Runx1 heterozygosity leads to an acceleration of mesodermal commitment and specification to the BL-CFCs and to the hematopoietic lineages in EBs. © 2004 by The American Society of Hematology.
Original languageEnglish
Pages (from-to)886-889
Number of pages3
JournalBlood
Volume103
Issue number3
DOIs
Publication statusPublished - 1 Feb 2004

Keywords

  • Animals
  • Base Sequence
  • Colony-Forming Units Assay
  • genetics: DNA, Complementary
  • deficiency: DNA-Binding Proteins
  • cytology: Embryo
  • Gene Expression Regulation, Developmental
  • genetics: Hematopoiesis
  • cytology: Hematopoietic Stem Cells
  • In Vitro
  • cytology: Mesoderm
  • Mice
  • Mice, Knockout
  • deficiency: Proto-Oncogene Proteins
  • Research Support, U.S. Gov't, P.H.S.
  • deficiency: Transcription Factors

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