Nanotopography influences adhesion, spreading, and self-renewal of human embryonic stem cells.

Nanotopography influences adhesion, spreading, and self-renewal of human embryonic stem cells.
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DOI:
10.1021/nn3004923
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发表时间:
2012-05-22
期刊:
影响因子:
17.1
通讯作者:
Fu J
Fu J
中科院分区:
材料科学1区
文献类型:
--
作者:
Chen W;Villa-Diaz LG;Sun Y;Weng S;Kim JK;Lam RH;Han L;Fan R;Krebsbach PH;Fu J

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人类胚胎干细胞(hESCs)在未来的细胞治疗中具有巨大的潜力。然而,它们对来自细胞微环境的生物物理信号的机械敏感性尚未得到很好的表征。本文介绍了一种有效的微加工策略,用于精确控制和绘制玻璃表面的纳米粗糙度。我们的研究结果表明,纳米形貌可以为不同的hESC行为提供有效的调控信号,包括细胞形态、粘附、增殖、克隆扩增和自我更新。我们的研究结果表明,hESCs的拓扑感知可能包括反馈调节,包括机械感觉整合素介导的细胞基质粘附、肌球蛋白II和e -钙粘蛋白。我们的研究结果还表明,细胞对纳米形貌的反应是细胞类型特异性的,因此,我们可以使用纳米级的图案玻璃表面为hESCs和NIH/3T3成纤维细胞生成空间分离的共培养系统。
Human embryonic stem cells (hESCs) have great potentials for future cell-based therapeutics. However, their mechanosensitivity to biophysical signals from the cellular microenvironment is not well characterized. Here we introduced an effective microfabrication strategy for accurate control and patterning of nanoroughness on glass surfaces. Our results demonstrated that nanotopography could provide a potent regulatory signal over different hESC behaviors, including cell morphology, adhesion, proliferation, clonal expansion, and self-renewal. Our results indicated that topological sensing of hESCs might include feedback regulation involving mechanosensory integrin-mediated cell-matrix adhesion, myosin II, and E-cadherin. Our results also demonstrated that cellular responses to nanotopography were cell-type specific and as such, we could generate a spatially segregated co-culture system for hESCs and NIH/3T3 fibroblasts using patterned nanorough glass surfaces.
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