摘要
目的研究磨屑钛颗粒对骨髓间充质干细胞(BMSCs)粘附能力影响的可能细胞分子机制。方法选用经体外传代纯化培养后的大鼠骨髓间充质干细胞(rBMSCs),与不同直径大小的钛颗粒悬液共孵育,再采用精准的流室系统对钛颗粒负荷的rBMSCs施加一定的流体剪切应力(FSS)后立刻固定细胞,经免疫荧光抗体染色,结合流式细胞术定量分析rBMSCs表面粘附分子表达的变化情况。同时设置相应的未经钛颗粒孵育的rBMSCs细胞为对照组细胞。结果剪切应力可明显上调rBMSCs表面粘附分子的表达。不同直径大小的钛颗粒可不同程度地抑制rBMSCs的粘附能力,颗粒越小,抑制作用越明显。结论磨屑颗粒所引起的BMSCs细胞流变学异常是人工关节无菌性松动发生的可能机制。
Objective To study the potential mechanism for bone marrow mesenchymal stem cell's (BM- SC's)} adhesion behavior influenced by different-sized titanium particle (Ti). Methods Rat bone marrow mesenchymal stem ceils ( rBMSCs ) were loaded with circular Ti particles, which had different diameters. Unloaded rBMSCs were used as control. Following Ti loading, fluid shear stress ( FSS ) was applied to each group of cells. Results Shear stress obviously augmented the expression of rBMSCs' adhesion molecules. While wear debris Titanium particles attenuated the adhesion behavior of rBMSCs and the effect was size-dependent. Conclusion The abnormal cytorheology of BMSCs by wear particles loading may contribute to the mechanism for aseptic loosening of artificial joint.
出处
《中国综合临床》
北大核心
2006年第6期521-523,共3页
Clinical Medicine of China
基金
高等学校博士点专项科研基金资助项目(20020610049)
国家高技术研究发展计划(863计划)课题资助项目(2002AA326080)
关键词
人工关节
无菌性松动
钛颗粒
骨髓间充质干细胞
流体剪切应力
Artificial joint
Aseptic loosening
Titanium particles
Bone marrow mesenchymal stem ceils
Fluid shear stress