Please use this identifier to cite or link to this item: https://doi.org/10.1242/dev.054536
Title: Rumba and Haus3 are essential factors for the maintenance of hematopoietic stem/progenitor cells during zebrafish hematopoiesis
Authors: Du, L. 
Xu, J.
Li, X.
Ma, N.
Liu, Y.
Peng, J.
Osato, M. 
Zhang, W.
Wen, Z.
Keywords: Caudal hematopoietic tissue
Definitive hematopoiesis
Hematopoietic stem/progenitor cells
Ontogeny
Ventral wall of dorsal aorta
Zebrafish
Issue Date: 15-Feb-2011
Citation: Du, L., Xu, J., Li, X., Ma, N., Liu, Y., Peng, J., Osato, M., Zhang, W., Wen, Z. (2011-02-15). Rumba and Haus3 are essential factors for the maintenance of hematopoietic stem/progenitor cells during zebrafish hematopoiesis. Development 138 (4) : 619-629. ScholarBank@NUS Repository. https://doi.org/10.1242/dev.054536
Abstract: The hallmark of vertebrate definitive hematopoiesis is the establishment of the hematopoietic stem/progenitor cell (HSPC) pool during embryogenesis. This process involves a defined ontogenic switching of HSPCs in successive hematopoietic compartments and is evolutionarily conserved from teleost fish to human. In zebrafish, HSPCs originate from the ventral wall of the dorsal aorta (VDA), from which they subsequently mobilize to an intermediate hematopoietic site known as the caudal hematopoietic tissue (CHT) and finally colonize the kidney for adult hematopoiesis. Despite substantial understanding of the ontogeny of HSPCs, the molecular basis governing migration, colonization and maintenance of HSPCs remains to be explored fully. Here, we report the isolation and characterization of two zebrafish mutants, rumbahkz1 and sambahkz2, that are defective in generating definitive hematopoiesis. We find that HSPC initiation in the VDA and subsequent homing to the CHT are not affected in these two mutants. However, the further development of HSPCs in the CHT is compromised in both mutants. Positional cloning reveals that Rumba is a novel nuclear C2H2 zinc-finger factor with unknown function and samba encodes an evolutionarily conserved protein that is homologous to human augmin complex subunit 3 (HAUS3). Furthermore, we show that these two factors independently regulate cell cycle progression of HSPCs and are cell autonomously required for HPSC development in the CHT. Our study identifies Rumba and Haus3 as two essential regulators of HSPC maintenance during zebrafish fetal hematopoiesis.
Source Title: Development
URI: http://scholarbank.nus.edu.sg/handle/10635/110782
ISSN: 09501991
DOI: 10.1242/dev.054536
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