论文
论文题目: RNA polymerase III component Rpc9 regulates hematopoietic stem and progenitor cell maintenance in zebrafish
论文题目英文:
作者: 韦永龙,#Jin Xu,#张文清,#温子龙,刘峰*
论文出处:
年: 2016
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期: DOI: 10.1242/dev.126797
页:
联系作者: 刘峰
发表期刊: Development
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论文连接 http://dev.biologists.org/content/early/2016/05/04/dev.126797
影响因子:
摘要: 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.
英文摘要:
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