From mechanical force to RhoA activation.

From mechanical force to RhoA activation.
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DOI:
10.1021/bi300758e
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发表时间:
2012-09-25
期刊:
影响因子:
2.9
通讯作者:
Burridge K
Burridge K
中科院分区:
生物学3区
文献类型:
--
作者:
Lessey EC;Guilluy C;Burridge K

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在它们的一生中,所有的细胞不断地经历各种机械力并对其做出反应。这些通常起源于外部,但也可以由于收缩的肌动蛋白细胞骨架而在内部产生。机械力触发多条信号通路。几种融合导致GTP酶RhoA的激活。在这篇综述中,我们主要关注机械力导致RhoA调节的途径,特别是当力通过细胞黏附分子传递时,细胞黏附分子介导细胞-基质或细胞-细胞相互作用。我们讨论了导致RhoA激活的上游信号事件,以及这一途径的下游后果。这不仅包括细胞骨架的重组,在正反馈循环中,肌球蛋白产生的收缩增加,而且还对基因表达和分化产生深刻影响。
Throughout their lives all cells constantly experience and respond to various mechanical forces. These frequently originate externally but can also arise internally as a result of the contractile actin cytoskeleton. Mechanical forces trigger multiple signaling pathways. Several converge and result in the activation of the GTPase RhoA. In this review we focus on the pathways by which mechanical force leads to RhoA regulation, especially when force is transmitted via cell adhesion molecules that mediate either cell-matrix or cell-cell interactions. We discuss both the upstream signaling events that lead to activation of RhoA, as well as the downstream consequences of this pathway. These include not only cytoskeletal reorganization and, in a positive feedback loop, increased myosin-generated contraction, but also profound effects on gene expression and differentiation.
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