Westfall Trudi A, Brimeyer Ryan, Twedt Jen, Gladon Jean, Olberding Andrea, Furutani-Seiki Makoto, Slusarski Diane C
Department of Biological Sciences, University of Iowa, Iowa City, IA 52242, USA.
J Cell Biol. 2003 Sep 1;162(5):889-98. doi: 10.1083/jcb.200303107.
We provide genetic evidence defining a role for noncanonical Wnt function in vertebrate axis formation. In zebrafish, misexpression of Wnt-4, -5, and -11 stimulates calcium (Ca2+) release, defining the Wnt/Ca2+ class. We describe genetic interaction between two Wnt/Ca2+ members, Wnt-5 (pipetail) and Wnt-11 (silberblick), and a reduction of Ca2+ release in Wnt-5/pipetail. Embryos genetically depleted of both maternal and zygotic Wnt-5 product exhibit cell movement defects as well as hyperdorsalization and axis-duplication phenotypes. The dorsalized phenotypes result from increased beta-catenin accumulation and activation of downstream genes. The Wnt-5 loss-of-function defect is consistent with Ca2+ modulation having an antagonistic interaction with Wnt/beta-catenin signaling.
我们提供了遗传学证据,确定了非经典Wnt功能在脊椎动物轴形成中的作用。在斑马鱼中,Wnt-4、-5和-11的错误表达会刺激钙(Ca2+)释放,从而定义了Wnt/Ca2+类别。我们描述了两个Wnt/Ca2+成员Wnt-5(pipetail)和Wnt-11(silberblick)之间的遗传相互作用,以及Wnt-5/pipetail中Ca2+释放的减少。在母源和合子Wnt-5产物均被基因敲除的胚胎中,表现出细胞运动缺陷以及过度背化和轴重复表型。背化表型是由β-连环蛋白积累增加和下游基因激活导致的。Wnt-5功能丧失缺陷与Ca2+调节与Wnt/β-连环蛋白信号传导的拮抗相互作用一致。