Tissue Fluidity Promotes Epithelial Wound Healing

Tissue Fluidity Promotes Epithelial Wound Healing
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组织流动性促进上皮伤口愈合

DOI:
10.1101/433557
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发表时间:
2018
期刊:
--
影响因子:
--
通讯作者:
Tetley R
Tetley R
中科院分区:
--
文献类型:
--
作者:
Tetley R

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上皮组织中细胞的集体行为取决于它们的机械性质。然而,组织力学对体内伤口愈合的贡献仍然知之甚少。在这里,我们调查组织力学和伤口愈合之间的关系,在liveDrosophilawing成虫盘,并表明,通过调整上皮细胞连接张力,我们可以系统地改变伤口愈合的速度。与肌动球蛋白荷包缝合线的收缩一致,我们观察到细胞通过插入在伤口边缘彼此流过,使人想起流体中的分子,导致无缝伤口闭合。使用基于细胞的物理模型,我们预测,减少交界处的张力流化的组织,通过嵌入率的增加和相应的体积粘度的减少,在一个unjumping过渡的方式。所产生的组织流体化加速伤口愈合。因此,当我们实验性地降低翼盘中的组织张力时,嵌入率增加并且伤口在更短的时间内修复。
The collective behaviour of cells in epithelial tissues is dependent on their mechanical properties. However, the contribution of tissue mechanics to wound healing in vivo remains poorly understood. Here, we investigate the relationship between tissue mechanics and wound healing in liveDrosophilawing imaginal discs and show that by tuning epithelial cell junctional tension, we can systematically alter the rate of wound healing. Coincident with the contraction of an actomyosin purse string, we observe cells flowing past each other at the wound edge by intercalating, reminiscent of molecules in a fluid, resulting in seamless wound closure. Using a cell-based physical model, we predict that a reduction in junctional tension fluidizes the tissue through an increase in intercalation rate and corresponding reduction in bulk viscosity, in the manner of an unjamming transition. The resultant fluidization of the tissue accelerates wound healing. Accordingly, when we experimentally reduce tissue tension in wing discs, the intercalation rate increases and wounds repair in less time.
形态发生细胞形状变化的重现使伤口能够重新上皮化
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