Force transmission during adhesion-independent migration.

Force transmission during adhesion-independent migration.
复制标题

在粘附非依赖性迁移过程中的力传递。

DOI:
10.1038/ncb3134
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发表时间:
2015-04
影响因子:
21.3
通讯作者:
Paluch EK
Paluch EK
中科院分区:
生物学1区
文献类型:
--
作者:
Bergert M;Erzberger A;Desai RA;Aspalter IM;Oates AC;Charras G;Salbreux G;Paluch EK

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当细胞使用基于整联蛋白的局灶性粘附移动时,它们在运动方向上以约100 Pa的大应力拉动,该应力使基底收缩。然而,整合素介导的粘连不是体内受限迁移所必需的。在局灶性无粘连迁移过程中,推进力的传递及其大小和方向尚不清楚。在这里,我们结合联合收割机理论和实验,以探讨参与无粘附迁移的力量。使用非粘附起泡细胞系作为模型,我们表明,肌动蛋白皮质流驱动细胞运动通过非特异性基板摩擦。引人注目的是,推动细胞前进的力比基于局灶性粘附的运动性低几个数量级。此外,无粘附迁移中的力分布是相反的:它的作用是在运动方向上扩展而不是收缩基材。这种根本不同的力传递模式可能对体内迁移过程中的细胞-细胞和细胞-基质相互作用产生影响。
When cells move using integrin-based focal adhesions, they pull in the direction of motion with large, ~100 Pa, stresses that contract the substrate. Integrin-mediated adhesions, however, are not required for in vivo confined migration. During focal adhesion-free migration, the transmission of propelling forces, and their magnitude and orientation, are not understood. Here, we combine theory and experiments to investigate the forces involved in adhesion-free migration. Using a non-adherent blebbing cell line as a model, we show that actin cortex flows drive cell movement via non-specific substrate friction. Strikingly, the forces propelling the cell forward are several orders of magnitude lower than during focal adhesion-based motility. Moreover, the force distribution in adhesion-free migration is inverted: it acts to expand, rather than contract, the substrate in the direction of motion. This fundamentally different mode of force transmission may have implications for cell-cell and cell-substrate interactions during migration in vivo.
DOI: 10.1073/pnas.1207968109
发表时间: 2012-09-04
影响因子: 11.1
作者:
Bergert, Martin;Chandradoss, Stanley D.;Paluch, Ewa
通讯作者: Paluch, Ewa
DOI: 10.1126/science.1224143
发表时间: 2012-10-12
期刊: SCIENCE
影响因子: 56.9
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通讯作者: Grill, Stephan W.
DOI: 10.1007/978-1-61779-207-6_28
发表时间: 2011-01-01
期刊: CELL MIGRATION: DEVELOPMENTAL METHODS AND PROTOCOLS, SECOND EDITION
影响因子: --
作者:
Heuze, Melina L.;Collin, Olivier;Piel, Matthieu
通讯作者: Piel, Matthieu