颞下颌关节滑膜间充质干细胞的分离与培养

目的进行颞下颌关节滑膜间充质干细胞（SMSCs）的体外分离与培养。方法用有限稀释法筛选出SMSCs，并在25ml培养瓶中扩增培养。噻唑蓝法检测SMSCs的细胞生长周期，细胞免疫化学检测波形蛋白和角蛋白的表达，流式细胞技术对SMSCs进行CD8，CD34，CD44，血管细胞间黏附分子-1（VCAM-1）和细胞间黏附分子-1（ICAM-1）的检测。结果体外培养的SMSCs，细胞突起明显，细胞外形均匀一致，免疫染色显示波形蛋白阳性与角蛋白阴性。流式细胞仪检测发现其有CD44、VCAM-1和ICAM-1的表达。结论从成人的颞下颌关节滑膜中可以分离培养出SMSCs。

Identification and characterization of synovial mesenchymal stem cells in temporomandibular joint

Objective To identify and characterize mesenchymal stem cells from synovial membrane of temporomandibular joint in vitro. Methods Synovial mesenchymal stem cells (SMSCs) were obtained by limited dilution method and expanded in 25 ml flasks. Methyl thiazolyl tetrazolium (MTT) method was used to determine the cell growth cycles. The expressions of vimentin and keratin were respectively detected with immunocytochemistry, while the expressions of CD8, CD34, CD44, vascular cell adhesion molecule-1 (VCAM-1) and intercellular adhesion molecule-1 (ICAM-1) were determined by flow cytometry. ResultsPure mesenchymal stem cells were of spindle shape and uniform in size, which were intensively positive in vimentin, but negative in keratin. The expression of CD44, VCAM-1 and ICAM-1 were also verified by flow cytometry. Conclusions Mesenchymal stem cells could be purified from adult synovial membrane of temporomandibular joint.