Designing Topographically Textured Microparticles for Induction and Modulation of Osteogenesis in Mesenchymal Stem Cell Engineering

Designing Topographically Textured Microparticles for Induction and Modulation of Osteogenesis in Mesenchymal Stem Cell Engineering
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设计拓扑纹理微粒以诱导和调节间充质干细胞工程中的成骨作用

DOI:
10.1101/2020.03.22.002279
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发表时间:
2020
期刊:
--
影响因子:
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通讯作者:
Amer M
Amer M
中科院分区:
--
文献类型:
--
作者:
Amer M

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间充质干细胞是骨发育和再生研究的热点。微颗粒通过利用其结构特征来调节大部分成骨反应的潜力在这里得到了证明。利用从聚乳酸中分离易溶牺牲组分的方法,制备了具有不同微尺度特征的形貌纹理微颗粒。研究了不同地形特征对原代人间充质干细胞附着、增殖和成骨标志物的影响。在没有骨诱导补充剂的情况下,与传统的光滑微颗粒相比,在纹理微颗粒上培养的细胞表现出明显增加的成骨标志物的表达。它们也表现出不同的形态、附着和增殖反应。在体内观察到显著改变的基因表达和代谢谱,具有不同的组织学特征。本研究强调了定制的地形设计如何提供细胞指导性的3D微环境,允许通过在不使用外源性骨诱导因子的情况下引发所需的下游反应来操纵干细胞命运。
Mesenchymal stem cells are the focus of intense research in bone development and regeneration. The potential of microparticles as modulating moieties of osteogenic response by utilizing their architectural features is demonstrated herein. Topographically textured microparticles of varying microscale features are produced by exploiting phase-separation of a readily soluble sacrificial component from polylactic acid. The influence of varying topographical features on primary human mesenchymal stem cell attachment, proliferation and markers of osteogenesis is investigated. In the absence of osteoinductive supplements, cells cultured on textured microparticles exhibit notably increased expression of osteogenic markers relative to conventional smooth microparticles. They also exhibit varying morphological, attachment and proliferation responses. Significantly altered gene expression and metabolic profiles are observed, with varying histological characteristicsin vivo. This study highlights how tailoring topographical design offers cell-instructive 3D microenvironments which allow manipulation of stem cell fate by eliciting the desired downstream response without use of exogenous osteoinductive factors.
用于选择干细胞培养物中谱系引导代谢物的可调节超分子水凝胶 Lineage-Guiding Stem
DOI: --
发表时间: 2020
期刊:
影响因子: --
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发表时间: 2015-07-06
期刊: Scientific reports
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期刊: Cell metabolism
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