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Artificial Auricular Cartilage Using Silk Fibroin and Polyvinyl Alcohol Hydrogel

机译:丝素蛋白和聚乙烯醇水凝胶的人工耳软骨

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摘要

Several methods for auricular cartilage engineering use tissue engineering techniques. However, an ideal method for engineering auricular cartilage has not been reported. To address this issue, we developed a strategy to engineer auricular cartilage using silk fibroin (SF) and polyvinyl alcohol (PVA) hydrogel. We constructed different hydrogels with various ratios of SF and PVA by using salt leaching, silicone mold casting, and freeze-thawing methods. We characterized each of the hydrogels in terms of the swelling ratio, tensile strength, pore size, thermal properties, morphologies, and chemical properties. Based on the cell viability results, we found a blended hydrogel composed of 50% PVA and 50% SF (P50/S50) to be the best hydrogel among the fabricated hydrogels. An intact 3D ear-shaped auricular cartilage formed six weeks after the subcutaneous implantation of a chondrocyte-seeded 3D ear-shaped P50/S50 hydrogel in rats. We observed mature cartilage with a typical lacunar structure both in vitro and in vivo via histological analysis. This study may have potential applications in auricular tissue engineering with a human ear-shaped hydrogel.
机译:用于耳软骨工程的几种方法使用组织工程技术。然而,尚未报道一种用于工程化耳软骨的理想方法。为了解决此问题,我们制定了一种使用丝素蛋白(SF)和聚乙烯醇(PVA)水凝胶工程化耳软骨的策略。我们使用盐浸,硅树脂铸模和冻融方法构建了具有不同比例的SF和PVA的不同水凝胶。我们根据溶胀率,拉伸强度,孔径,热性能,形态和化学性质对每种水凝胶进行了表征。根据细胞活力结果,我们发现由50%PVA和50%SF(P50 / S50)组成的混合水凝胶是所制造水凝胶中最好的水凝胶。在大鼠皮下植入软骨细胞播种的3D耳形P50 / S50水凝胶后六周,形成了完整的3D耳形耳廓软骨。通过组织学分析,我们在体外和体内观察到具有典型腔隙结构的成熟软骨。这项研究在具有人耳形水凝胶的耳组织工程中可能具有潜在的应用。

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