Notch lineages and activity in intestinal stem cells determined by a new set of knock-in mice.

Notch lineages and activity in intestinal stem cells determined by a new set of knock-in mice.
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Notch谱系和肠道干细胞的活性由一组新的敲入小鼠确定。

DOI:
10.1371/journal.pone.0025785
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Artavanis-Tsakonas S
Artavanis-Tsakonas S
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Fre S;Hannezo E;Sale S;Huyghe M;Lafkas D;Kissel H;Louvi A;Greve J;Louvard D;Artavanis-Tsakonas S

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Notch信号在控制肠细胞命运特化和稳态中的保守作用已被广泛研究。然而,由于缺乏可靠的工具来研究体内Notch表达和功能,Notch信号传导活跃的细胞的确切身份以及不同Notch受体旁系同源物在肠道中的作用仍然不明确。我们产生了一系列新的转基因小鼠,使我们能够通过谱系分析正式证明Notch 1和Notch 2在隐窝干细胞中特异性表达。此外,一种新的Notch报告小鼠,Hes 1-EmGFPSAT,在隐窝干细胞和吸收祖细胞中表现出独特的Notch活性。这个敲入和报告小鼠的名册代表了在几乎所有组织中体内功能性探索Notch途径的宝贵资源。
The conserved role of Notch signaling in controlling intestinal cell fate specification and homeostasis has been extensively studied. Nevertheless, the precise identity of the cells in which Notch signaling is active and the role of different Notch receptor paralogues in the intestine remain ambiguous, due to the lack of reliable tools to investigate Notch expression and function in vivo. We generated a new series of transgenic mice that allowed us, by lineage analysis, to formally prove that Notch1 and Notch2 are specifically expressed in crypt stem cells. In addition, a novel Notch reporter mouse, Hes1-EmGFPSAT, demonstrated exclusive Notch activity in crypt stem cells and absorptive progenitors. This roster of knock-in and reporter mice represents a valuable resource to functionally explore the Notch pathway in vivo in virtually all tissues.
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