PUBLICATION

RNA polymerase III component Rpc9 regulates hematopoietic stem and progenitor cell maintenance in zebrafish

Authors

Wei, Y., Xu, J., Zhang, W., Wen, Z., Liu, F.

ID

ZDB-PUB-160507-8

Date

2016

Source

Development (Cambridge, England) 143(12): 2103-10 (Journal)

Registered Authors

Liu, Feng, Wei, Yonglong, Wen, Zilong

Keywords

RNA polymerase III, Rpc9, P53, Hematopoietic stem and progenitor cells, Zebrafish

MeSH Terms

RNA Polymerase III/metabolism*
Cell Survival
Base Sequence
T-Lymphocytes/cytology
Mutation/genetics
Embryo, Nonmammalian/metabolism
Hematopoiesis
Cell Proliferation
Gene Knockdown Techniques
Amino Acid Sequence
Hematopoietic Stem Cells/cytology*
Hematopoietic Stem Cells/metabolism*
Animals
Tumor Suppressor Protein p53/metabolism
Zebrafish Proteins/metabolism*
Zebrafish/metabolism*
Phenotype

PubMed

27151951 Full text @ Development

Abstract

Hematopoietic stem and progenitor cells (HSPCs) are capable of self-renewal and replenishing all lineages of blood cells throughout the lifetime and thus critical for tissue homeostasis. However, the mechanism regulating HSPC development is still incompletely understood. Here, we isolate a zebrafish mutant with defective T lymphopoiesis and positional cloning identifies that Rpc9, a component of DNA-directed RNA polymerase III (Pol III) complex, is responsible for the mutant phenotype. Further analysis shows that rpc9-deficiency leads to the impairment of HSPCs and their derivatives in zebrafish embryos. Excessive apoptosis is observed in the caudal hematopoietic tissue (CHT, the equivalent of fetal liver in mammals) of rpc9(-/-) embryos and the hematopoietic defects in rpc9(-/-) embryos can be fully rescued by suppression of p53 Thus, our work illustrate that Rpc9, a component of Pol III, plays an important tissue-specific role in HSPC maintenance during zebrafish embryogenesis and that it might be conserved across vertebrates including mammals.

Genes / Markers

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