Wnt signaling regulates postembryonic hypothalamic progenitor differentiation.

Wnt signaling regulates postembryonic hypothalamic progenitor differentiation.
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DOI:
10.1016/j.devcel.2012.07.012
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发表时间:
2012-09-11
期刊:
影响因子:
11.8
通讯作者:
Dorsky, Richard I.
Dorsky, Richard I.
中科院分区:
生物学1区
文献类型:
--
作者:
Wang, Xu;Kopinke, Daniel;Lin, Junji;McPherson, Adam D.;Duncan, Robert N.;Otsuna, Hideo;Moro, Enrico;Hoshijima, Kazuyuki;Grunwald, David J.;Argenton, Francesco;Chien, Chi-Bin;Murtaugh, L. Charles;Dorsky, Richard I.

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先前的研究已经提出了Wnt信号可能在单个群体中调节神经祖细胞维持和神经元分化的可能性。在这里,我们研究了Wnt/β-catenin活性在斑马鱼下丘脑中的作用,发现该途径首先是胚胎中未指定的下丘脑祖细胞增殖所必需的。在后期阶段,包括成年期,Wnt活性的顺序激活和抑制是神经祖细胞分化所需的,并负调节放射状胶质细胞分化。Wnt活性的存在在成年小鼠的下丘脑祖细胞中是保守的,在那里它在抑制放射状胶质细胞的分化中起保守的作用。本研究建立了脊椎动物下丘脑作为Wnt调控的胚胎后神经祖细胞分化的模型,并定义了Wnt信号在神经发生中的特定作用。
Previous studies have raised the possibility that Wnt signaling may regulate both neural progenitor maintenance and neuronal differentiation within a single population. Here we investigate the role of Wnt/β-catenin activity in the zebrafish hypothalamus and find that the pathway is first required for the proliferation of unspecified hypothalamic progenitors in the embryo. At later stages, including adulthood, sequential activation and inhibition of Wnt activity is required for the differentiation of neural progenitors and negatively regulates radial glia differentiation. The presence of Wnt activity is conserved in hypothalamic progenitors of the adult mouse, where it plays a conserved role in inhibiting the differentiation of radial glia. This study establishes the vertebrate hypothalamus as a model for Wnt-regulated post-embryonic neural progenitor differentiation, and defines specific roles for Wnt signaling in neurogenesis.
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