A conserved Pbx-Wnt-p63-Irf6 regulatory module controls face morphogenesis by promoting epithelial apoptosis.

A conserved Pbx-Wnt-p63-Irf6 regulatory module controls face morphogenesis by promoting epithelial apoptosis.
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DOI:
10.1016/j.devcel.2011.08.005
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发表时间:
2011-10-18
期刊:
影响因子:
11.8
通讯作者:
Selleri, Licia
Selleri, Licia
中科院分区:
生物学1区
文献类型:
--
作者:
Ferretti, Elisabetta;Li, Bingsi;Zewdu, Rediet;Wells, Victoria;Hebert, Jean M.;Karner, Courtney;Anderson, Matthew J.;Williams, Trevor;Dixon, Jill;Dixon, Michael J.;Depew, Michael J.;Selleri, Licia

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哺乳动物面部突起的形态发生需要细胞增殖、迁移和凋亡的协调来发展复杂的特征。唇裂和/或腭裂(CL/P),最常见的人类颅面出生缺陷,可以由任何这些程序的干扰引起。WNT,P63和IRF 6的突变在人类和小鼠中产生CL/P;然而,这些基因如何调节仍然是难以捉摸的。我们产生的小鼠系缺乏Pbx基因的头部外胚层,并证明他们表现出完全渗透CL/P和扰动Wnt信号。我们还表征了Pbx蛋白结合的面中部调控元件,以控制Wnt 9 b-Wnt 3的表达,从而调节p63。总之,我们建立了一个Pbx依赖的Wnt-p63-Irf 6调控模块中面外胚层是保守的哺乳动物。该网络的失调导致面中部细胞凋亡和CL/P的局部抑制。Pbx突变体中的异位Wnt外胚层表达挽救了裂开,为组织修复开辟了途径。
Morphogenesis of mammalian facial processes requires coordination of cellular proliferation, migration, and apoptosis to develop intricate features. Cleft lip and/or palate (CL/P), the most frequent human craniofacial birth defect, can be caused by perturbation of any of these programs. Mutations of WNT, P63, and IRF6 yield CL/P in humans and mice; however, how these genes are regulated remains elusive. We generated mouse lines lacking Pbx genes in cephalic ectoderm and demonstrated that they exhibit fully penetrant CL/P and perturbed Wnt signalling. We also characterized a midfacial regulatory element that Pbx proteins bind in order to control the expression of Wnt9b-Wnt3, which in turn regulate p63. Altogether, we establish a Pbx-dependent Wnt-p63-Irf6 regulatory module in midfacial ectoderm that is conserved within mammals. Dysregulation of this network leads to localized suppression of midfacial apoptosis and CL/P. Ectopic Wnt ectodermal expression in Pbx mutants rescues the clefting, opening avenues for tissue repair.
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