The Planar Polarity Component VANGL2 Is a Key Regulator of Mechanosignaling.

The Planar Polarity Component VANGL2 Is a Key Regulator of Mechanosignaling.
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DOI:
10.3389/fcell.2020.577201
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发表时间:
2020
影响因子:
5.5
通讯作者:
Dean CH
Dean CH
中科院分区:
生物学2区
文献类型:
--
作者:
Cheong SS;Akram KM;Matellan C;Kim SY;Gaboriau DCA;Hind M;Del Río Hernández AE;Griffiths M;Dean CH

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VANGL 2是平面细胞极性(PCP)通路的一个组成部分,其调节组织极性和图案化。Vangl 2Lp突变由于功能失调的肌动球蛋白驱动的形态发生而引起肺分支缺陷。由于肌动球蛋白网络调节细胞力学,我们推测当VANGL 2被破坏时,机械信号可能会受损。在这里,我们使用来自Vangl 2Lp/+小鼠的精确切割肺切片(PCLS)的实时成像来确定肺泡形成由于受损的上皮细胞迁移而减弱。Vangl 2Lp/+气管上皮细胞(TEC)和肺泡上皮细胞(AEC)表现出高度破坏的肌动球蛋白网络和粘着斑(FA)。细胞力的功能评估证实Vangl 2Lp/+ TEC中牵引力产生受损。Vang 12 Lp气道上皮中的雅普信号传导减少,与VangL 2在机械转导中的作用一致。此外,RhoA信号传导的激活恢复了Vangl 2Lp/+中的肌动球蛋白组织,证实RhoA是VANGL 2的效应子。这项研究确定了VANGL 2在机械信号传导中的关键作用,这是PCP途径在组织形态发生中的关键作用的基础。
VANGL2 is a component of the planar cell polarity (PCP) pathway, which regulates tissue polarity and patterning. The Vangl2Lp mutation causes lung branching defects due to dysfunctional actomyosin-driven morphogenesis. Since the actomyosin network regulates cell mechanics, we speculated that mechanosignaling could be impaired when VANGL2 is disrupted. Here, we used live-imaging of precision-cut lung slices (PCLS) from Vangl2Lp/+ mice to determine that alveologenesis is attenuated as a result of impaired epithelial cell migration. Vangl2Lp/+ tracheal epithelial cells (TECs) and alveolar epithelial cells (AECs) exhibited highly disrupted actomyosin networks and focal adhesions (FAs). Functional assessment of cellular forces confirmed impaired traction force generation in Vangl2Lp/+ TECs. YAP signaling in Vangl2Lp airway epithelium was reduced, consistent with a role for VANGL2 in mechanotransduction. Furthermore, activation of RhoA signaling restored actomyosin organization in Vangl2Lp/+, confirming RhoA as an effector of VANGL2. This study identifies a pivotal role for VANGL2 in mechanosignaling, which underlies the key role of the PCP pathway in tissue morphogenesis.
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