The modulation of MSC integrin expression by RGD presentation.

The modulation of MSC integrin expression by RGD presentation.
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DOI:
10.1016/j.biomaterials.2013.01.091
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发表时间:
2013-05
期刊:
影响因子:
14
通讯作者:
Segura, Tatiana
Segura, Tatiana
中科院分区:
工程技术1区
文献类型:
--
作者:
Lam, Jonathan;Segura, Tatiana

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设计用于模拟复杂的天然细胞外基质(ECM)的生物材料可以使用多种技术来控制封装细胞的行为。常用的方法包括控制材料的机械性能,掺入生物活性信号,空间图案化生物活性信号,以及控制生物活性信号的时间释放。进一步的设计参数如生物活性信号分布可用于操纵细胞行为。聚集粘附肽的努力集中在将细胞接种在生物材料上。在这里,我们报告了聚集的粘附肽RGD对小鼠间充质干细胞封装在三维透明质酸水凝胶内的影响。成簇的生物活性信号导致细胞铺展和整合素表达的显著差异。这些结果表明信号RGD肽簇是可用于影响和指导包封细胞行为的额外水凝胶设计参数。
Biomaterials designed to mimic the intricate native extracellular matrix (ECM) can use a variety of techniques to control the behavior of encapsulated cells. Common methods include controlling the mechanical properties of the material, incorporating bioactive signals, spatially patterning bioactive signals, and controlling the time-release of bioactive signals. Further design parameters like bioactive signal distribution can be used to manipulate cell behavior. Efforts on clustering adhesion peptides have focused on seeding cells on top of a biomaterial. Here we report the effect of clustering the adhesion peptide RGD on mouse mesenchymal stem cells encapsulated inside three-dimensional hyaluronic acid hydrogels. The clustered bioactive signals resulted in significant differences in both cell spreading and integrin expression. These results indicate that signal RGD peptide clustering is an additional hydrogel design parameter can be used to influence and guide the behavior of encapsulated cells.
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