Pax6 is a human neuroectoderm cell fate determinant.

Pax6 is a human neuroectoderm cell fate determinant.
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DOI:
10.1016/j.stem.2010.04.017
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发表时间:
2010-07-02
期刊:
影响因子:
23.9
通讯作者:
Zhang SC
Zhang SC
中科院分区:
医学1区
文献类型:
--
作者:
Zhang X;Huang CT;Chen J;Pankratz MT;Xi J;Li J;Yang Y;Lavaute TM;Li XJ;Ayala M;Bondarenko GI;Du ZW;Jin Y;Golos TG;Zhang SC

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神经外胚层(NE)的转录调控尚不清楚。在这里,我们发现Pax6在人类胎儿早期的NE细胞和从人类胚胎干细胞(HESCs)分化而来的NE细胞中均匀表达。这与后来Pax6在小鼠大脑受限区域的表达形成了对比。取消Pax6阻止HESCs的NE规范。Pax6a或Pax6b的过表达而不是Pax6PD的过表达可触发hESC分化。然而,只有Pax6a将hESCs转换为NE。相反,Pax6功能的丧失和获得都不影响小鼠NE的特性。在人类NE规范中,Pax6a和Pax6b都与多能基因启动子结合,但只有Pax6a与NE基因结合。这些发现表明Pax6是人类NE的转录决定因素,并提示Pax6a和Pax6b通过不同的靶向多能性和NE基因来决定人类从多能性向NE命运的转变。
The transcriptional regulation of neuroectoderm (NE) specification is unknown. Here we show that Pax6 is uniformly expressed in early NE cells of human fetuses and those differentiated from human embryonic stem cells (hESCs). This contrasts the later expression of Pax6 in restricted mouse brain regions. Knockdown of Pax6 blocks NE specification from hESCs. Overexpression of either Pax6a or Pax6b, but not Pax6 PD, triggers hESC differentiation. However, only Pax6a converts hESCs to NE. In contrast, neither loss nor gain of function of Pax6 affects mouse NE specification. Both Pax6a and Pax6b bind to pluripotent gene promoters but only Pax6a binds to NE genes during human NE specification. These findings indicate that Pax6 is a transcriptional determinant of the human NE and suggest that Pax6a and Pax6b coordinate with each other in determining the transition from pluripotency to the NE fate in human by differentially targeting pluripotent and NE genes.
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发表时间: 2003-05-30
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