Eya1 interacts with Six2 and Myc to regulate expansion of the nephron progenitor pool during nephrogenesis.

Eya1 interacts with Six2 and Myc to regulate expansion of the nephron progenitor pool during nephrogenesis.
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DOI:
10.1016/j.devcel.2014.10.015
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发表时间:
2014-11-24
期刊:
影响因子:
11.8
通讯作者:
Xu, Pin-Xian
Xu, Pin-Xian
中科院分区:
生物学1区
文献类型:
--
作者:
Xu, Jinshu;Wong, Elaine Y. M.;Cheng, Chunming;Li, Jun;Sharkar, Mohammad T. K.;Xu, Chelsea Y.;Chen, Binglai;Sun, Jianbo;Jing, Dongzhu;Xu, Pin-Xian

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肾单位祖细胞的自我更新和增殖以及启动肾发生的决定是指导肾脏发育的关键事件。尽管最近在定义祖细胞谱系和调节因子方面取得了进展,但有关驱动祖细胞扩张的机制的基本问题仍未得到解答。在这里,我们展示了 Eya1 与 Six2 和 Myc 相互作用来控制自我更新的细胞活动。细胞命运追踪揭示了中间中胚层内 Eya1+ 群体对肾单位形成细胞命运的发育限制,以及尾部中肾和后肾单位之间的共同起源。 Eya1 的条件性失活会导致 Six2 表达丧失和祖细胞过早上皮化。 Six2 介导 Eya1 易位至细胞核,其中 Eya1 利用其苏氨酸磷酸酶活性来控制 Myc 磷酸化/去磷酸化以及在祖细胞中的功能。我们的结果揭示了 Eya1、Six2 和 Myc 之间在驱动肾发生过程中多能祖细胞的扩张和维持方面的功能联系。
Self-renewal and proliferation of nephron progenitor cells and the decision to initiate nephrogenesis are crucial events directing kidney development. Despite recent advancements in defining lineage and regulators for the progenitors, fundamental questions about mechanisms driving expansion of the progenitors remain unanswered. Here we show that Eya1 interacts with Six2 and Myc to control self-renewing cell activity. Cell fate tracing reveals a developmental restriction of the Eya1+ population within the intermediate mesoderm to nephron-forming cell fates and a common origin shared between caudal mesonephric and metanephric nephrons. Conditional inactivation of Eya1 leads to loss of Six2 expression and premature epithelialization of the progenitors. Six2 mediates translocation of Eya1 to the nucleus, where Eya1 uses its threonine phosphatase activity to control Myc phosphorylation/dephosphorylation and function in the progenitor cells. Our results reveal a functional link between Eya1, Six2, and Myc in driving the expansion and maintenance of the multipotent progenitors during nephrogenesis.
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