Dickkopf1 and the Spemann-Mangold head organizer.

Dickkopf1 and the Spemann-Mangold head organizer.
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Dickkopf1 和 Spemann-Mangold 首席组织者。

DOI:
10.1387/ijdb.11291852
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发表时间:
2001
期刊:
The International journal of developmental biology
影响因子:
--
通讯作者:
Andrey Glinka
Andrey Glinka
中科院分区:
--
文献类型:
--
作者:
C. Niehrs;O. Kazanskaya;Wei Wu;Andrey Glinka

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两栖动物的研究表明,抑制Wnt和BMP信号对头部发育至关重要,Spemann-Mangold组织者的头部诱导可能是由分泌的Wnt拮抗剂介导的。wnt是有效的后显因素,并与Spemann-Mangold组织者对抗。Dickkopf1 (dkk1)编码一种在爪蟾、小鼠和斑马鱼头部组织中心表达的分泌效应物。它作为一种Wnt抑制剂,能够与BMP抑制剂一起诱导爪蟾异位胚胎头的形成。它能使中胚层和神经外胚层前化,促进脊索前板和前脑的形成。注射抑制性抗体导致小头畸形和独眼。因此,Dkk1是脊椎动物头部组织者的重要中介。
Work in amphibians indicates that inhibition of Wnt and BMP signals is essential for head development and that head induction by the Spemann-Mangold organizer may be mediated by secreted Wnt antagonists. Wnts are potent posteriorizing factors and antagonize the Spemann-Mangold organizer. Dickkopf1 (dkk1) encodes a secreted effector expressed in head organizing centers of Xenopus, mouse and zebrafish. It acts as a Wnt inhibitor and is able together with BMP inhibitors to induce the formation of ectopic embryonic heads in Xenopus. It anteriorizes both mesendoderm and neuroectoderm, promoting prechordal plate and forebrain fates. Injection of inhibitory antibodies leads to microcephaly and cyclopia. Dkk1 thus is an essential mediator of the vertebrate head organizer.
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