FGF9 and FGF20 maintain the stemness of nephron progenitors in mice and man.

FGF9 and FGF20 maintain the stemness of nephron progenitors in mice and man.
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DOI:
10.1016/j.devcel.2012.04.018
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发表时间:
2012-06-12
期刊:
影响因子:
11.8
通讯作者:
Kopan, Raphael
Kopan, Raphael
中科院分区:
生物学1区
文献类型:
--
作者:
Barak, Hila;Huh, Sung-Ho;Chen, Shuang;Jeanpierre, Cecile;Martinovic, Jelena;Parisot, Melanie;Bole-Feysot, Christine;Nitschke, Patrick;Salomon, Remi;Antignac, Corinne;Ornitz, David M.;Kopan, Raphael

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维持胚胎肾单位祖细胞所必需的生态位信号的身份尚不清楚。在这里,我们提供的证据表明,Fgf20和Fgf9,表达的利基,和Fgf9,分泌从邻近的输尿管芽,是必要的和足够的,以维持祖干。小鼠中这些冗余配体水平的降低导致小生境内的过早祖细胞分化。人的FGF20或小鼠的两种配体的缺失导致肾发育不全。在体外显示了足够性,其中Fgf20或Fgf9(单独或与Bmp 7一起)分别在培养5或2天后维持分离的后肾间充质或分选的肾单位祖细胞,其仍然能够响应Wnt信号而分化。这些发现确定了肾单位干细胞生态位的一个长期追求的关键组成部分,并为这些祖细胞的体外长期培养和利用提供了希望。
The identity of niche signals necessary to maintain embryonic nephron progenitors is unclear. Here we provide evidence that Fgf20 and Fgf9, expressed in the niche, and Fgf9, secreted from the adjacent ureteric bud, are necessary and sufficient to maintain progenitor stemness. Reduction in the level of these redundant ligands in the mouse led to premature progenitor differentiation within the niche. Loss of FGF20 in humans, or of both ligands in mice, resulted in kidney agenesis. Sufficiency was shown in vitro where Fgf20 or Fgf9 (alone or together with Bmp7) maintained isolated metanephric mesenchyme or sorted nephron progenitors that remained competent to differentiate in response to Wnt signals after 5 or 2 days in culture, respectively. These findings identify a long sought-after critical component of the nephron stem cell niche and hold promise for long-term culture and utilization of these progenitors in vitro.
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