华西口腔医学杂志

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流体切应力增加骨髓来源破骨细胞内游离钙离子浓度的研究

陈明1, 2, 梁星3, 温颖1, 白保晶1, 黄梦鹿1, 高卫民1   

  1. 1.首都医科大学附属北京口腔医院修复科, 北京100050; 2.口腔生物医学工程教育部重点实验室, 四川大学; 3.四川大学华西口腔医院修复科, 四川成都610041
  • 收稿日期:2007-08-25 修回日期:2007-08-25 出版日期:2007-08-20 发布日期:2007-08-20
  • 通讯作者: 梁星,Tel:028- 85503570
  • 作者简介:陈明(1969-),男,辽宁人,主治医师,博士
  • 基金资助:

    国家自然科学基金资助项目(30271428和30672345)

Fluid shear str ess incr eases the Ca2 + concentr ation in bone - mar row der ived osteoclast - like cells

CHEN Ming1,2, LIANG Xing3, WEN Ying1, BAI Bao- jing1, HUANG Meng- lu1, GAO Wei- min1   

  1. 1. Dept. of Prosthodontics, Beijing Stomatological Hospital, Capital Medical University, Beijing 100050, China; 2. Key. Laboratory of Oral Biomedical Engineering of Ministry of Education, Sichuan University, Chengdu 610041, China;3. Dept. of Prosthodontics, West China College of Stomatology, Sichuan University, Chengdu 610041, China
  • Received:2007-08-25 Revised:2007-08-25 Online:2007-08-20 Published:2007-08-20
  • Contact: LIANG Xing3,Tel:028- 85503570

摘要:

目的研究流体切应力对培养于载玻片上的破骨细胞内Ca2+浓度的影响。方法应用激光扫描共聚焦显微镜和Fluo- 3/AM荧光探针标记技术,测定加力前后破骨细胞内游离Ca2+的荧光强度,获得的图像在计算机上用图像分析软件进行比较分析。结果在37 ℃、Fluo- 3/AM终浓度为10 μmol/L的条件下,破骨细胞可获得良好的标记效果,与未加力的对照组相比,流体切应力使破骨细胞内Ca2+荧光信号的平均强度值显著增加。结论体外培养于载玻片上的破骨细胞内Ca2+浓度对流体切应力敏感,Ca2+可介导流体切应力对破骨细胞功能的调节。

关键词: 破骨细胞, 激光扫描共聚焦显微镜, 流体切应力

Abstract:

Objective To study the change of Ca2+ density in cultured osteoclast- like cells in response to fluid shear stress. Methods Laser scanning confocal microscope and fluorescent probe were used to detect the free Ca2+ in osteoclast- like cells before and after undergoing fluid shear stress. The images were analyzed and compared with image software. Results At 37 ℃ the free Ca2+ in osteoclast- like cells could be labelled effectively with 10 μmol/L Fluo- 3/AM. Compared with contol group, the average intensity of Ca2+ fluorescent signal in osteoclast- like cells undergoing fluid shear stress increased significantly. Conclusion The Ca2+ concentration in bone- marrow derived osteoclast- like cells is sensitive to fluid shear stress, which suggests osteoclast - like cells modulate their function in response to fluid shear stress through the change of free Ca2+ concentration.

Key words: osteosteoclast, laser scanning confocal microscope, fluid shear stress