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复合转化生长因子-β1的磺化壳聚糖/聚赖氨酸纳米粒子的制备及其体外诱导干细胞分化性能

DOI: 10.3724/SP.J.1105.2013.12425, PP. 1177-1182

Keywords: 磺化壳聚糖,转化生长因子-β1,纳米粒子,骨髓间充质干细胞,分化

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Abstract:

采用共沉淀法制备了复合转化生长因子-β1(TGF-β1)的磺化壳聚糖/聚赖氨酸纳米粒子(SCS/PLL/TGF-β1),研究了磺化壳聚糖的浓度对纳米粒子粒径和表面电位的影响.所得纳米微粒的粒径在240~290nm、表面电位在-0.4~-1.3mV之间可调.采用透射电子显微镜表征了磺化壳聚糖/聚赖氨酸(SCS/PLL)和SCS/PLL/TGF-β1纳米粒子的形貌.通过体外骨髓间充质干细胞(BMSCs)培养实验,分别考察了SCS/PLL/TGF-β1纳米粒子对BMSCs的增殖、氨基葡聚糖(GAGs)分泌和Ⅱ型胶原基因表达的影响.结果显示,相对于等量的SCS/PLL或同浓度的自由TGF-β1,SCS/PLL/TGF-β1纳米粒子可有效保护TGF-β1的活性,促进BMSCs向软骨细胞分化,可望应用于软骨修复材料等领域的研究.

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