Posterior malformations in Dact1 mutant mice arise through misregulated Vangl2 at the primitive streak.

Posterior malformations in Dact1 mutant mice arise through misregulated Vangl2 at the primitive streak.
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DOI:
10.1038/ng.435
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发表时间:
2009-09
期刊:
影响因子:
30.8
通讯作者:
Cheyette, Benjamin N. R.
Cheyette, Benjamin N. R.
中科院分区:
生物学1区
文献类型:
--
作者:
Suriben, Rowena;Kivimaee, Saul;Fisher, Daniel A. C.;Moon, Randall T.;Cheyette, Benjamin N. R.

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Dact 1突变纯合子小鼠(Dpr/Frodo)表型模仿人类脊柱、泌尿生殖系统和远端消化道畸形。我们跟踪这种表型破坏胚层形态发生在原始条纹(PS)。值得注意的是,Vangl 2(平面细胞极性(PCP)途径的跨膜组分)的杂合突变挽救了隐性Dact 1表型,而Dact 1缺失挽救了半显性Vangl 2表型。我们表明,Dact 1,细胞内蛋白,形成一个复杂的Vangl 2。在Dact 1突变体中,Vangl 2在PS处增加,其中细胞通常经历上皮-间充质转化。这与异常的E-钙粘蛋白分布和PCP途径生化指标的变化有关。我们的结论是Dact 1有助于形态发生在PS通过调节Vangl 2上游的细胞粘附和PCP途径。
Mice homozygous for mutations in Dact1 (Dpr/Frodo) phenocopy human malformations involving the spine, genitourinary system, and distal digestive tract. We trace this phenotype to disrupted germ layer morphogenesis at the primitive streak (PS). Remarkably, heterozygous mutation of Vangl2, a transmembrane component of the Planar Cell Polarity (PCP) pathway, rescues recessive Dact1 phenotypes, whereas loss of Dact1 reciprocally rescues semidominant Vangl2 phenotypes. We show that Dact1, an intracellular protein, forms a complex with Vangl2. In Dact1 mutants, Vangl2 is increased at the PS where cells ordinarily undergo an epithelial-mesenchymal transition. This is associated with abnormal E-cadherin distribution and changes in biochemical measures of the PCP pathway. We conclude that Dact1 contributes to morphogenesis at the PS by regulating Vangl2 upstream of cell adhesion and the PCP pathway.
DOI: 10.1016/s0925-4773(96)00549-7
发表时间: 1996-08-01
影响因子: 2.6
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