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Title

A population of hematopoietic stem cells derives from GATA4-expressing progenitors located in the placenta and lateral mesoderm of mice

AuthorsCañete, Ana CSIC; Carmona, Rita; Ariza, Laura; Sánchez, María José CSIC ORCID; Rojas, Anabel CSIC ORCID; Muñoz-Chápuli, Ramón
Issue Date2017
PublisherFerrata Storti Foundation
CitationHaematologica 102(4): 647-655 (2017)
AbstractGATA transcription factors are expressed in mesoderm and endoderm during development. GATA1-3, but not GATA4, are critically involved in hematopoiesis. An enhancer (G2) of the mouse Gata4 gene directs its expression throughout the lateral mesoderm and the allantois, beginning at E7.5, becoming restricted to the septum transversum by E10.5, and disappearing by midgestation. We have studied the developmental fate of the G2-Gata4 cell lineage using a G2-Gata4Cre;R26REYFP mouse line. We found a substantial number of YFP+ hematopoietic cells of lymphoid, myeloid and erythroid lineages in embryos. Fetal CD41+/cKit+/CD34+ and Lin-/cKit+/CD31+ YFP+ hematopoietic progenitors were much more abundant in the placenta than in the aortagonad-mesonephros area. They were clonogenic in the Methocult assay and fully reconstituted hematopoiesis in myeloablated mice. YFP+ cells represented about 20% of the hematopoietic system of adult mice. Adult YFP+ hematopoietic stem cells constituted a long-term repopulating, transplantable population. Thus, a lineage of adult hematopoietic stem cells is characterized by the expression of GATA4 in their embryonic progenitors and probably by its extraembryonic (placental) origin, although GATA4 appeared not to be required for hematopoietic stem cell differentiation. Both lineages basically showed similar physiological behavior in normal mice, but clinically relevant properties of this particular hematopoietic stem cell population should be checked in physiopathological conditions.
Publisher version (URL)https://doi.org/10.3324/haematol.2016.155812
URIhttp://hdl.handle.net/10261/163457
DOI10.3324/haematol.2016.155812
Identifiersdoi: 10.3324/haematol.2016.155812
issn: 0390-6078
e-issn: 1592-8721
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