Nanotopography alters nuclear protein expression, proliferation and differentiation of human mesenchymal stem/stromal cells.

Nanotopography alters nuclear protein expression, proliferation and differentiation of human mesenchymal stem/stromal cells.
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DOI:
10.1371/journal.pone.0114698
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Leong KW
Leong KW
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kulangara K;Yang J;Chellappan M;Yang Y;Leong KW

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间充质干/基质细胞对其微环境中存在的物理信号做出反应,例如基质弹性、几何形状或形态、增殖和分化方面的地形。尽管研究已经证明了粘着斑在地形介导的基因表达变化中的作用,但将基质地形与细胞核联系起来的信息仍然很少。在这里,我们通过二维凝胶电泳和蛋白质印迹表明,与平面基质相比,在 350 nm 光栅上培养的间充质干/基质细胞中 A 型核纤层蛋白和视网膜母细胞瘤蛋白表达下调;这些变化导致增殖减少和分化潜力变化。
Mesenchymal stem/stromal cells respond to physical cues present in their microenvironment such as substrate elasticity, geometry, or topography with respect to morphology, proliferation, and differentiation. Although studies have demonstrated the role of focal adhesions in topography-mediated changes of gene expression, information linking substrate topography to the nucleus remains scarce. Here we show by two-dimensional gel electrophoresis and western blotting that A-type lamins and retinoblastoma protein are downregulated in mesenchymal stem/stromal cells cultured on 350 nm gratings compared to planar substrates; these changes lead to a decrease in proliferation and changes in differentiation potential.
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