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Novel soy protein scaffolds for tissue regeneration: Material characterization and interaction with human mesenchymal stem cells

机译:用于组织再生的新型大豆蛋白支架:材料表征和与人间充质干细胞的相互作用

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Soy protein modified with heat treatment and enzyme crosslinking using transglutaminase in maltodextrin was used to fabricate novel, porous three-dimensional scaffolds through lyophilization. Physical properties of scaffolds were characterized using scanning electron microscopy, mercury intrusion porosimetry, moisture content analysis and mechanical testing. Human mesenchymal stem cells (hMSC) were seeded and cultured in vitro on the scaffolds for up to 2 weeks, and changes in stem cell growth and morphology were examined. The resulting scaffolds had rough surfaces, irregular pores with size distributions between 10 and 125 μm, <5% moisture content and compressive moduli ranging between 50 and 100 Pa. Enzyme treatment significantly lowered the moisture content. Increasing amounts of applied enzyme units lowered the median pore size. Although enzyme treatment did not affect the mechanical properties of the scaffolds, it did increase the degradation time by at least 1 week. These changes in scaffold degradation altered the growth and morphology of seeded hMSC. Cell proliferation was observed in scaffolds containing 3% soy protein isolate treated with 1 U of transglutaminase. These results demonstrate that controlling scaffold degradation rates is crucial for optimizing hMSC growth on soy protein scaffolds and that soy protein scaffolds have the potential to be used in tissue engineering applications.
机译:使用麦芽糖糊精中经过转谷氨酰胺酶热处理和大豆酶交联改性的大豆蛋白,可通过冻干制备新颖的多孔三维支架。使用扫描电子显微镜,压汞法,水分含量分析和机械测试来表征支架的物理性质。将人间充质干细胞(hMSC)播种并在支架上进行体外培养长达2周,并检查干细胞生长和形态的变化。所得的支架具有粗糙的表面,不规则的孔,其尺寸分布在10至125μm之间,水分含量<5%,压缩模量在50至100 Pa之间。酶处理显着降低了水分含量。施加的酶单位数量的增加降低了中值孔径。尽管酶处理不影响支架的机械性能,但确实使降解时间增加了至少1周。支架降解的这些变化改变了种子hMSC的生长和形态。在含有经1 U转谷氨酰胺酶处理的3%大豆分离蛋白的支架中观察到细胞增殖。这些结果表明,控制支架降解速率对于优化hMSC在大豆蛋白支架上的生长至关重要,并且大豆蛋白支架具有在组织工程应用中使用的潜力。

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