The kinetics of force-induced cell reorganization depend on microtubules and actin.

The kinetics of force-induced cell reorganization depend on microtubules and actin.
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DOI:
10.1002/cm.20439
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发表时间:
2010-04
期刊:
影响因子:
2.9
通讯作者:
Kemkemer, Ralf
Kemkemer, Ralf
中科院分区:
生物学4区
文献类型:
--
作者:
Goldyn, Alexandra M.;Kaiser, Peter;Spatz, Joachim P.;Ballestrem, Christoph;Kemkemer, Ralf

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细胞骨架是细胞在功能和结构上适应机械力的重要因素。在这项研究中,我们研究了微管和肌动蛋白肌球蛋白机械力诱导的NIH 3 T3成纤维细胞重定向的动力学的影响。这些细胞受到单轴拉伸力,这是已知的诱导细胞重新取向垂直于拉伸方向。我们发现,破坏丝状肌动蛋白使用细胞松弛素D和latrunculin B,以及诱导大量的非极化肌动蛋白聚合的jasplakinaline,抑制拉伸诱导的重定向。同样地,肌球蛋白II活性的阻断废除了拉伸诱导的细胞重定向,但有趣的是,与肌球蛋白抑制的非拉伸细胞相比,在拉伸条件下增加了它们的运动性。研究微管对细胞重定向的贡献,我们发现,虽然在重定向本身中没有发挥重要作用,但微管稳定性对该事件的动力学有显著影响。总之,我们得出结论,肌动蛋白,连同微管,调节力诱导的细胞重定向的动力学。© 2010 Wiley-Liss公司。
The cytoskeleton is an important factor in the functional and structural adaption of cells to mechanical forces. In this study we investigated the impact of microtubules and the acto-myosin machinery on the kinetics of force-induced reorientation of NIH3T3 fibroblasts. These cells were subjected to uniaxial stretching forces that are known to induce cellular reorientation perpendicular to the stretch direction. We found that disruption of filamentous actin using cytochalasin D and latrunculin B as well as an induction of a massive unpolarized actin polymerization by jasplakinolide, inhibited the stretch-induced reorientation. Similarly, blocking of myosin II activity abolished the stretch-induced reorientation of cells but, interestingly, increased their motility under stretching conditions in comparison to myosin-inhibited nonstretched cells. Investigating the contribution of microtubules to the cellular reorientation, we found that, although not playing a significant role in reorientation itself, microtubule stability had a significant impact on the kinetics of this event. Overall, we conclude that acto-myosin, together with microtubules, regulate the kinetics of force-induced cell reorientation. © 2010 Wiley-Liss, Inc.
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