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Fabrication of Novel High Surface Area Mushroom Gilled Fibers and Their Effects on Human Adipose Derived Stem Cells Under Pulsatile Fluid Flow for Tissue Engineering Applications

机译:新型高表面积蘑菇烫金纤维的制备及其对组织工程应用中脉动流对人体脂肪干细胞的影响

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摘要

The fabrication and characterization of novel high surface area hollow gilled fiber tissue engineering scaffolds via industrially relevant, scalable, repeatable, high speed, and economical nonwoven carding technology is described. Scaffolds were validated as tissue engineering scaffolds using human adipose derived stem cells (hASC) exposed to pulsatile fluid flow (PFF). The effects of fiber morphology on the proliferation and viability of hASC, as well as effects of varied magnitudes of shear stress applied via PFF on the expression of the early osteogenic gene marker runt related transcription factor 2 (RUNX2) were evaluated. Gilled fiber scaffolds led to a significant increase in proliferation of hASC after seven days in static culture, and exhibited fewer dead cells compared to pure PLA round fiber controls. Further, hASC-seeded scaffolds exposed to 3 and 6 dyne/cm2 resulted in significantly increased mRNA expression of RUNX2 after one hour of PFF in the absence of soluble osteogenic induction factors. This is the first study to describe a method for the fabrication of high surface area gilled fibers and scaffolds. The scalable manufacturing process and potential fabrication across multiple nonwoven and woven platforms makes them promising candidates for a variety of applications that require high surface area fibrous materials.
机译:描述了通过工业上相关的,可扩展的,可重复的,高速的和经济的非织造梳理技术来制造和表征新型的高表面积空心镀金纤维组织工程支架。使用暴露于脉动液流(PFF)的人脂肪来源的干细胞(hASC),将支架验证为组织工程支架。评估了纤维形态对hASC增殖和生存力的影响,以及通过PFF施加的不同剪应力大小对早期成骨基因标记矮子相关转录因子2(RUNX2)表达的影响。静态培养7天后,镀金的纤维支架导致hASC的增殖显着增加,并且与纯PLA圆形纤维对照相比,其死细胞更少。此外,在没有可溶性成骨诱导因子的情况下,在PFF作用1小时后,暴露于3和6达因/ cm 2 的hASC接种的支架导致RUNX2的mRNA表达显着增加。这是第一项描述高表面积镀金纤维和支架制造方法的研究。可扩展的制造工艺以及跨多个非织造和织造平台的潜在制造工艺使它们成为需要高表面积纤维材料的各种应用的有希望的候选者。

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