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Dynamic loading of electrospun yarns guides mesenchymal stem cells towards a tendon lineage

机译:动态负载电纺纱线可将间充质干细胞导向肌腱谱系

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摘要

Alternative strategies are required when autograft tissue is not sufficient or available to reconstruct damaged tendons. Electrospun fibre yarns could provide such an alternative. This study investigates the seeding of human mesenchymal stem cells (hMSC) on electrospun yarns and their response when subjected to dynamic tensile loading. Cell seeded yarns sustained 3600 cycles per day for 21 days. Loaded yarns demonstrated a thickened cell layer around the scaffold׳s exterior compared to statically cultured yarns, which would suggest an increased rate of cell proliferation and/or matrix deposition, whilst maintaining a predominant uniaxial cell orientation. Tensile properties of cell-seeded yarns increased with time compared to acellular yarns. Loaded scaffolds demonstrated an up-regulation in several key tendon genes, including collagen Type I. This study demonstrates the support of hMSCs on electrospun yarns and their differentiation towards a tendon lineage when mechanically stimulated.
机译:当自体移植组织不足或无法重建受损的肌腱时,则需要其他策略。电纺纤维纱可以提供这种替代方案。这项研究调查了人类间充质干细胞(hMSC)在电纺纱上的种子及其在动态拉伸载荷下的响应。多孔晶纱每天可持续3600个循环,共21天。与静态培养的纱线相比,加载的纱线在支架的外部表现出较厚的细胞层,这表明细胞增殖和/或基质沉积的速率增加,同时保持主要的单轴细胞取向。与无蜂窝纱相比,蜂窝播种纱的拉伸性能随时间增加。加载的支架显示出几个关键的肌腱基因的上调,包括I型胶原。这项研究表明了hMSCs在电纺纱线上的支持以及在机械刺激下它们向肌腱谱系的分化。

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