不同预处理脱细胞牛骨基质复合成骨化骨髓间充质干细胞生物相容性研究

目的将经成骨化诱导后大鼠骨髓间充质干细胞(MSC)与脱细胞牛骨基质(ABECM)复合,构建组织工程骨。实验着重观察不同预处理方法对构建的组织工程骨的过程——细胞与ABECM复合和生长的影响,为有效快速构建组织工程化骨奠定理论基础。方法用Wistar大鼠2只,从股骨取MSC在体外扩增、纯化、诱导成骨化,做苏木精-伊红染色鉴定。实验组用胎牛血清(FBS)、多聚赖氨酸(PLL),对照组用磷酸盐缓冲溶液预处理的ABECM复合构建组织工程骨,体外培养。用流式细胞仪计数并计算细胞黏附率、测定碱性磷酸酶活性,倒置光学显微镜、扫描电子显微镜观察细胞生长、增殖情况。结果接种后6、12h实验组细胞黏附率高于对照组(P0.05)。扫描电子显微镜观察:复合培养第3天,实验组细胞在材料表面已完全伸展,附着在材料表面;对照组细胞大多呈不规则形,未完全伸展。碱性磷酸酶活性测定:复合培养第3、6天,实验组的碱性磷酸酶活性均明显高于对照组(P0.05)。结论用FBS和PLL分别预处理,可以改善ABECM材料表面特性,利于提高细胞接种效率,从而能更有效、更快速地构建组织工程骨。

Study on biocompatibility of acellular bovin bone extracellular matrix combined with osteogenous mesenchymal stem cells by different pretreatments

Objective To establish the tissue engineering bone by combination of acellular bovine bone extracellular matrix (ABECM) with osteogenous induced marrow mesenchymal stem cells (MSC) of Wistar rat,and study the effect of different pretreatments as the construction process in combination and growth of MSC with ABCEM during establishing the engineering bone in order to find the theoretical basis of effective and rapid establishing engineering bone. Methods Two Wistar rats were enrolled in this study,their MSC w...