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肌腱衍生仿生表面形貌诱导腱细胞表型维持。

Tendon-Derived Biomimetic Surface Topographies Induce Phenotypic Maintenance of Tenocytes .

机构信息

Department of Biomedical Engineering, Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands.

Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands.

出版信息

Tissue Eng Part A. 2021 Aug;27(15-16):1023-1036. doi: 10.1089/ten.TEA.2020.0249. Epub 2020 Nov 13.

Abstract

The tenocyte niche contains biochemical and biophysical signals that are needed for tendon homeostasis. The tenocyte phenotype is correlated with cell shape and , and shape-modifying cues are needed for tenocyte phenotypical maintenance. Indeed, cell shape changes from elongated to spread when cultured on a flat surface, and rat tenocytes lose the expression of phenotypical markers throughout five passages. We hypothesized that tendon gene expression can be preserved by culturing cells in the native tendon shape. To this end, we reproduced the tendon topographical landscape into tissue culture polystyrene, using imprinting technology. We confirmed that the imprints forced the cells into a more elongated shape, which correlated with the level of Scleraxis expression. When we cultured the tenocytes for 7 days on flat surfaces and tendon imprints, we observed a decline in tenogenic marker expression on flat but not on imprints. This research demonstrates that native tendon topography is an important factor contributing to the tenocyte phenotype. Tendon imprints therefore provide a powerful platform to explore the effect of instructive cues originating from native tendon topography on guiding cell shape, phenotype, and function of tendon-related cells.

摘要

腱细胞巢包含了维持腱组织稳态所必需的生化和物理信号。腱细胞的表型与细胞形状有关,并且需要形状修饰线索来维持腱细胞的表型。事实上,当细胞在平面上培养时,其形状会从细长变为伸展,并且大鼠腱细胞在五个传代中会失去表型标志物的表达。我们假设通过在天然腱组织形状中培养细胞可以保留腱组织的基因表达。为此,我们使用压印技术将组织培养聚苯乙烯上的腱组织形貌复制出来。我们证实,印迹迫使细胞形成更细长的形状,这与 Scleraxis 表达水平相关。当我们在平面和腱印迹上培养 7 天的腱细胞时,我们观察到在平面上培养的细胞中腱形成标志物的表达下降,但在印迹上没有下降。这项研究表明,天然腱组织的拓扑结构是影响腱细胞表型的重要因素。因此,腱印迹为探索源自天然腱组织拓扑结构的指导线索对引导与腱相关的细胞的形状、表型和功能的影响提供了一个强大的平台。

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