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GATA-2 Plays Two Functionally Distinct Roles during the Ontogeny of Hematopoietic Stem Cells

Open access
Ling, Kam-Wing, Ottersbach, Katrin, van Hamburg, Jan Piet, Oziemlak, Aneta, Tsai, Fong-Ying, Orkin, Stuart H., Ploemacher, Rob, Hendriks, Rudi W., Dzierzak, Elaine·2004·The Journal of Experimental Medicine

Abstract

GATA-2 is an essential transcription factor in the hematopoietic system that is expressed in hematopoietic stem cells (HSCs) and progenitors. Complete deficiency of GATA-2 in the mouse leads to severe anemia and embryonic lethality. The role of GATA-2 and dosage effects of this transcription factor in HSC development within the embryo and adult are largely unexplored. Here we examined the effects of GATA-2 gene dosage on the generation and expansion of HSCs in several hematopoietic sites throughout mouse development. We show that a haploid dose of GATA-2 severely reduces production and expansion of HSCs specifically in the aorta-gonad-mesonephros region (which autonomously generates the first HSCs), whereas quantitative reduction of HSCs is minimal or unchanged in yolk sac, fetal liver, and adult bone marrow. However, HSCs in all these ontogenically distinct anatomical sites are qualitatively defective in serial or competitive transplantation assays. Also, cytotoxic drug-induced regeneration studies show a clear GATA-2 dose–related proliferation defect in adult bone marrow. Thus, GATA-2 plays at least two functionally distinct roles during ontogeny of HSCs: the production and expansion of HSCs in the aorta-gonad-mesonephros and the proliferation of HSCs in the adult bone marrow.

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Crossref · 10.1084/jem.20031556

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Metadata

Authors
Ling, K.-W., Ottersbach, K., van Hamburg, J. P., Oziemlak, A., Tsai, F.-Y., Orkin, S. H., Ploemacher, R., Hendriks, R. W., & Dzierzak, E.
Venue
The Journal of Experimental Medicine
Published
2004-10-04
Volume
200
Issue
7
Pages
871-882
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W2150731845
Cited by
316
References
2
FWCI
6.79
Type
journal article
Language
en
Open access
bronze

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