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- 2015
流体剪切力作用下人脂肪基质细胞体外成骨分化的实验研究
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Abstract:
摘要 目的:分离人体脂肪基质细胞(hADSCs)并研究流体剪切应力对其成骨分化的影响。方法:将脂肪抽吸术获取的人体脂肪进行分离,应用强度为3 dyne/cm2的流体剪切力刺激30 min后观察细胞形态;应用四甲基偶氮唑蓝(MTT)法检测细胞的增殖能力, 绘制细胞生长曲线;碱性磷酸酶(ALP)及茜素红染色对其成骨分化进行鉴定。结果:胶原酶消化后的脂肪基质细胞呈梭形, 经流体剪切力作用培养后,细胞体积明显增大,胞浆丰富并含有较多的细胞器,细胞排列方向与加力方向一致, 呈漩涡状生长,生长速度加快。此外,流体剪切力加载后脂肪基质细胞内碱性磷酸酶活性增高,茜素红染色表明聚集的细胞团中心能形成矿化结节。结论:脂肪基质细胞中的成体干细胞经过流体剪切力作用后可向成骨细胞分化并具有明显的成骨表型,可作为骨组织工程的种子细胞
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