丝素蛋白/羟基磷灰石材料复合骨髓间充质干细胞构建组织工程化软骨

背景:随着组织工程的兴起,软骨损伤的修复可能性显著地提高,但单一的支架材料均不能符合理想支架,有一定的局限性.目的:观察骨髓间充质干细胞复合丝素蛋白/羟基磷灰石构建组织工程化软骨的可行性.方法:体外分离培养骨髓间充质干细胞,并定向诱导成软骨细胞,与丝素蛋白/羟基磷灰石复合培养,构建膝关节胫骨平台全层关节软骨缺损.54只大白兔单侧膝关节全层软骨缺损模型后随机抽签法分为3组,复合组植入细胞-丝素蛋白/羟基磷灰石复合物;材料组植入单纯丝素蛋白/羟基磷灰石,对照组不行任何植入.植入后8,12周CT检查及组织学检查观察软骨缺损修复情况.结果与结论:植入后8周,复合组关节面不平整,关节间隙增大,形成新生类软骨细胞,基质丰富.材料组关节面塌陷,软骨细胞少量增殖.植入后12周,复合组关节面平整,关节间隙如常.大量软骨细胞出现,与周边软骨色泽一样,支架材料完全降解.材料组关节面不平整,软骨细胞不完全充填,支架材料部分降解.对照组未见修复.提示用骨髓间充质干细胞复合丝素蛋白/羟基磷灰石可形成透明软骨修复动物膝关节全层软骨缺损,显示了丝素蛋白/羟基磷灰石材料作为关节软骨组织工程支架材料的良好生物相容性.

Silk fibroin/hydroxyapatite combined with bone marrow mesenchymal stem cells for construction of tissue engineered cartilage

BACKGROUND: With the emergence of tissue engineering, the possibility of repairing the cartilage injury is greatly increased, but single scaffold materials fail to meet ideal scaffold, and have some limitations. OBJECTIVE: To explore the feasibility of silk fibroin/hydroxyapatite combined with bone marrow mesenchymal stem cells (BMSCs) for construction of tissue engineered cartilage METHODS: BMSCs were isolated, cultured and induced into chondrocytes, which were cocultured with silk fibrion/hydroxyapatite t...