摘要
目的 :研究周期性牵张力对成熟破骨细胞MMP 3mRNA表达的影响 ,探讨机械张力与破骨细胞骨基质作用的关系。方法 :实验组从骨髓破骨细胞体外诱导培养的第 7天施加 6周 /min ,弹性基底膜发生 12%形变率的周期性牵张力 ,2 4h后 ,应用原位杂交染色技术检测多核破骨细胞内MMP 3mRNA表达变化情况。结果 :实验组施加周期性牵张力 2 4h后 ,多核破骨细胞MMP 3mRNA阳性信号在所观察视野内染色强度明显增强。结论 :体外周期性牵张力可刺激成熟破骨细胞MMP 3mRNA的表达 ,MMP 3在骨组织应力改建过程中发挥着重要作用。
Objective:To study the effect of the cyclic-tension force on the expression of matrix metalloproteinase-3 ( MMP-3) mRNA in osteoclasts. Methods: Bone marrow cells were cultured and induced by the combination of IL-6 and 1,25(OH) 2D 3 and identified. The bone marrow cells were seeded onto elastic 6-well culture plate at a density of 2×105 cells/ml in 2ml in each well and cultured for 7 days. Then the cells were subjected to 12% elongation by a strain unit at 6 cycles/min (i.e.5-s elongation and 5-s relaxation) . After 24 hours of stretching, the expression of MMP-3 mRNA in osteoclasts were determined by in situ hybridization analysis. Results:The stretched osteoclasts showed enhanced MMP-3 mRNA expression level. Conclusion: The mechanical stretching may affect the bone-resorbing activity by up-regulated the expression of MMP-3 mRNA in osteoclasts.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2004年第4期428-430,共3页
Journal of Practical Stomatology
基金
国家自然科学基金资助 项目编号 :30 30 0 393