Genetic interaction of PGE2 and Wnt signaling regulates developmental specification of stem cells and regeneration.

Genetic interaction of PGE2 and Wnt signaling regulates developmental specification of stem cells and regeneration.
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DOI:
10.1016/j.cell.2009.01.015
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发表时间:
2009-03-20
期刊:
影响因子:
64.5
通讯作者:
Zon LI
Zon LI
中科院分区:
生物学1区
文献类型:
--
作者:
Goessling W;North TE;Loewer S;Lord AM;Lee S;Stoick-Cooper CL;Weidinger G;Puder M;Daley GQ;Moon RT;Zon LI

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发育信号通路之间的相互作用支配干细胞的形成和功能。前列腺素(PG)E2调节脊椎动物造血干细胞(HSC)。类似地,Wnt信号通路控制HSC自我更新和骨髓再增殖。在这里,我们表明,wnt报告活性在斑马鱼造血干细胞是响应PGE 2的调制,在体内表现出直接的相互作用。PGE 2合成的抑制阻断了wnt诱导的HSC形成的改变。PGE 2通过cAMP/PKA介导的稳定磷酸化事件在β-连环蛋白降解水平上修饰wnt信号级联。PGE 2/Wnt相互作用调节小鼠干细胞和祖细胞群体在体外造血ES细胞测定和体内移植后。PGE 2和Wnt之间的关系在其他器官系统的再生过程中也是保守的。我们的工作提供了第一个体内证据表明,干细胞中的Wnt激活需要PGE 2,并表明PGE 2/Wnt相互作用是脊椎动物再生和恢复的主要调节因子。
Interactions between developmental signaling pathways govern the formation and function of stem cells. Prostaglandin (PG) E2 regulates vertebrate hematopoietic stem cells (HSC). Similarly, the Wnt signaling pathway controls HSC self-renewal and bone marrow repopulation. Here, we show that wnt reporter activity in zebrafish HSCs is responsive to PGE2 modulation, demonstrating a direct interaction in vivo. Inhibition of PGE2 synthesis blocked wnt-induced alterations in HSC formation. PGE2 modified the wnt signaling cascade at the level of β-catenin degradation through cAMP/PKA-mediated stabilizing phosphorylation events. The PGE2/Wnt interaction regulated murine stem and progenitor populations in vitro in hematopoietic ES cell assays and in vivo following transplantation. The relationship between PGE2 and Wnt was also conserved during regeneration of other organ systems. Our work provides the first in vivo evidence that Wnt activation in stem cells requires PGE2, and suggests the PGE2/Wnt interaction is a master regulator of vertebrate regeneration and recovery.
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