Flexibility of neural stem cells.

Flexibility of neural stem cells.
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DOI:
10.3389/fphys.2011.00016
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发表时间:
2011
影响因子:
4
通讯作者:
Lovell-Badge R
Lovell-Badge R
中科院分区:
医学2区
文献类型:
--
作者:
Remboutsika E;Elkouris M;Iulianella A;Andoniadou CL;Poulou M;Mitsiadis TA;Trainor PA;Lovell-Badge R

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胚胎皮层神经干细胞是一种具有自我更新能力的祖细胞,可以分化为神经元和神经胶质细胞。我们使用允许谱系选择的小鼠遗传模型从发育中的大脑皮层产生神经球,并发现自我更新的神经干细胞仅限于Sox 2表达细胞。在正常条件下,胚胎皮质神经球是异质性方面的Sox 2的表达,并含有星形胶质细胞,神经干细胞,神经祖细胞足够的可塑性,以产生神经嵴细胞时,移植到后脑的E1.5鸡和E8小鼠胚胎。然而,当神经球保持谱系选择,使所有细胞表达Sox 2,神经干细胞保持其Pax6+皮质放射状胶质细胞的身份,并表现出更有限的命运在体外和移植后。这些数据表明,Sox 2保留皮质身份,并调节自我更新Pax6+放射状胶质细胞的可塑性。
Embryonic cortical neural stem cells are self-renewing progenitors that can differentiate into neurons and glia. We generated neurospheres from the developing cerebral cortex using a mouse genetic model that allows for lineage selection and found that the self-renewing neural stem cells are restricted to Sox2 expressing cells. Under normal conditions, embryonic cortical neurospheres are heterogeneous with regard to Sox2 expression and contain astrocytes, neural stem cells, and neural progenitor cells sufficiently plastic to give rise to neural crest cells when transplanted into the hindbrain of E1.5 chick and E8 mouse embryos. However, when neurospheres are maintained under lineage selection, such that all cells express Sox2, neural stem cells maintain their Pax6+ cortical radial glia identity and exhibit a more restricted fate in vitro and after transplantation. These data demonstrate that Sox2 preserves the cortical identity and regulates the plasticity of self-renewing Pax6+ radial glia cells.
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发表时间: 2011-01-01
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