Propulsion and navigation within the advancing monolayer sheet.

Propulsion and navigation within the advancing monolayer sheet.
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DOI:
10.1038/nmat3689
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发表时间:
2013-09
期刊:
影响因子:
41.2
通讯作者:
Fredberg, Jeffrey J.
Fredberg, Jeffrey J.
中科院分区:
材料科学1区
文献类型:
--
作者:
Kim, Jae Hun;Serra-Picamal, Xavier;Tambe, Dhananjay T.;Zhou, Enhua H.;Park, Chan Young;Sadati, Monirosadat;Park, Jin-Ah;Krishnan, Ramaswamy;Gweon, Bomi;Millet, Emil;Butler, James P.;Trepat, Xavier;Fredberg, Jeffrey J.

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当伤口愈合,或身体计划形成,或肿瘤侵入时,观察到的前进细胞群内的细胞运动被认为是源于尚未观察到的物理应力,这些应力以某种直接和因果的机械方式起作用。在这里,我们表明,运动和应力之间的这种关系远非直接的。使用单层应力显微镜,我们探测迁移速度,细胞牵引力和细胞间的应力在上皮细胞片推进到一个岛上的细胞不能坚持。我们发现,位于岛附近的细胞施加牵引力,系统地拉向这个岛,无论细胞是否接近岛,沿沿着其边缘切向迁移,或矛盾的是,从它撤退。这种意想不到的细胞模式的主题,我们称之为kenotaxis,代表了强大的和系统的机械驱动力的细胞集体填补未填充的空间。
As a wound heals, or a body plan forms, or a tumor invades, observed cellular motions within the advancing cell swarm are thought to stem from yet to be observed physical stresses that act in some direct and causal mechanical fashion. Here we show that such a relationship between motion and stress is far from direct. Using monolayer stress microscopy, we probed migration velocities, cellular tractions and intercellular stresses in an epithelial cell sheet advancing towards an island on which cells cannot adhere. We found that cells located near the island exert tractions that pull systematically towards this island regardless of whether the cells approach the island, migrate tangentially along its edge or, paradoxically, recede from it. This unanticipated cell-patterning motif, which we call kenotaxis, represents the robust and systematic mechanical drive of the cellular collective to fill unfilled space.
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