首页> 外文期刊>Acta biomaterialia >In vitro engineered cartilage using synovium-derived mesenchymal stem cells with injectable gellan hydrogels.
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In vitro engineered cartilage using synovium-derived mesenchymal stem cells with injectable gellan hydrogels.

机译:使用滑膜来源的间充质干细胞与可注射的结冷水凝胶进行体外工程软骨。

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Synovium-derived mesenchymal stem cells (SMSC), a novel line of stem cells, are regarded as a promising cell source for cartilage tissue engineering. The goal of this study was to investigate rabbit SMSC coupled with injectable gellan hydrogels for in vitro engineered cartilage. SMSC were isolated from rabbit synovial tissue, amplified to passage 4 in monolayer, and encapsulated in injectable gellan hydrogels, constructs of which were cultured in chondrogenic medium supplemented with TGF-beta1, TGF-beta3 or BMP-2 for up to 42 days. The quality of the constructs was assessed in terms of cell proliferation and chondrocytic gene/protein expression using WST-1 assay, real-time RT-PCR, biochemical analysis, histology and immunohistochemical analysis. Results indicate that the viability of SMSC in hydrogels treated with TGF-beta1, TGF-beta3 and BMP-2 remained high at culture time. The constructs formed cartilaginous tissue with the expression of chondrocytic genes (collagen type II, aggrecan, biglycan, SOX 9) and cartilaginous matrix (sulphated glycosaminoglycan and collagen) as early as 21 days in culture. Both TGF-beta1 and TGF-beta3 treated SMSC-laden hydrogels showed more chondrogenesis compared with BMP-2 treated SMSC-laden hydrogels. It demonstrates that injectable SMSC-laden gels, when treated with TGF-beta1, TGF-beta3 or BMP-2, are highly competent for in vitro engineered cartilage formation, which lays a foundation for their potential application in clinical cartilage repair.
机译:滑膜来源的间充质干细胞(SMSC),一种新的干细胞系,被认为是用于软骨组织工程的有希望的细胞来源。这项研究的目的是研究兔SMSC结合可注射的吉兰糖水凝胶用于体外工程软骨。从兔滑膜组织中分离SMSC,单层扩增至第4代,并封装在可注射的结冷水凝胶中,将其构建物在补充了TGF-beta1,TGF-beta3或BMP-2的软骨形成培养基中培养长达42天。使用WST-1分析,实时RT-PCR,生化分析,组织学和免疫组化分析,根据细胞增殖和软骨细胞基因/蛋白质表达评估构建体的质量。结果表明,在培养时,用TGF-beta1,TGF-beta3和BMP-2处理的水凝胶中SMSC的活力仍然很高。早在培养21天时,该构建体就形成了软骨组织,其表达了软骨基因(II型胶原,聚集蛋白聚糖,双链聚糖,SOX 9)和软骨基质(硫酸化糖胺聚糖和胶原蛋白)。与BMP-2处理的SMSC负载水凝胶相比,TGF-beta1和TGF-beta3处理的SMSC负载水凝胶均显示出更多的软骨形成。它表明,当用TGF-beta1,TGF-beta3或BMP-2处理时,载有SMSC的凝胶具有很高的体外工程软骨形成能力,这为它们在临床软骨修复中的潜在应用奠定了基础。

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