首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Cell spreading controls endoplasmic and nuclear calcium: A physical gene regulation pathway from the cell surface to the nucleus.
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Cell spreading controls endoplasmic and nuclear calcium: A physical gene regulation pathway from the cell surface to the nucleus.

机译:细胞扩散控制内质和核钙:从细胞表面到细胞核的物理基因调控途径。

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摘要

Cells attaching to an extracellular matrix through integrins flatten out (spread) on the matrix, eliciting cellular signals needed for survival. We show that the shape of the nucleus changes and the nuclear calcium level increases in spreading cells. Moreover, cell spreading and osmotic stretching of isolated nuclei cause release of perinuclear Ca(2+), and patch clamping of nuclei reveals stretch-activated Ca(2+) permeable channels. Gene expression assays with myocyte enhancer factor 2, which is activated by calmodulin-dependent kinase IV, indicate that the elevation in nuclear Ca(2+) is functionally significant. We propose a mechano-transduction pathway in which spreading-induced nuclear stretching releases Ca(2+) from the perinuclear space, and the resulting Ca(2+) elevation in the nucleus provokes changes in gene expression.
机译:通过整联蛋白附着在细胞外基质上的细胞在基质上变平(散布),引发存活所需的细胞信号。我们显示,在扩散的细胞中,核的形状发生了变化,并且核钙水平增加了。此外,细胞扩散和渗透分离核的拉伸引起核周Ca(2+)的释放,并且核的膜片钳揭示了拉伸激活的Ca(2+)渗透通道。基因表达测定与肌细胞增强因子2,其被钙调蛋白依赖性激酶IV激活,表明核Ca(2+)的升高在功能上很重要。我们提出了一种机械传导途径,其中传播诱导的核拉伸从核周空间释放Ca(2+),并且在核中导致的Ca(2+)升高引起基因表达的变化。

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