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中华口腔医学研究杂志(电子版) ›› 2009, Vol. 3 ›› Issue (04) : 403 -409. doi: 10.3877 / cma.j.issn.1674-1366.2009-04-009

基础研究

细胞骨架完整性在流体剪切力诱导成骨细胞COX-2 基因表达中的作用
吴昌敬1, 李友瑞1, 徐亚娟1, 郭玲1, 张艺平1, 付强1,()   
  1. 1.510055 广州,中山大学光华口腔医学院·附属口腔医院·口腔医学研究所
  • 收稿日期:2009-03-12 出版日期:2009-08-01
  • 通信作者: 付强
  • 基金资助:
    广东省科技计划项目(2008B030301121)广东省医学科研基金(A2008227)

Effect of cytoskeleton integrity on the expression of COX-2 gene in osteoblasts induced by fluid shear stress

Chang-jing WU1, You-rui LI1, Ya-juan XU1, Ling GUO1, Yi-ping ZHANG1, Qiang FU1,()   

  1. 1.Guanghua School of Stomatology, Institute of Stomatological Research, Sun Yat-sen University, Guangzhou 510055, China
  • Received:2009-03-12 Published:2009-08-01
  • Corresponding author: Qiang FU
引用本文:

吴昌敬, 李友瑞, 徐亚娟, 郭玲, 张艺平, 付强. 细胞骨架完整性在流体剪切力诱导成骨细胞COX-2 基因表达中的作用[J/OL]. 中华口腔医学研究杂志(电子版), 2009, 3(04): 403-409.

Chang-jing WU, You-rui LI, Ya-juan XU, Ling GUO, Yi-ping ZHANG, Qiang FU. Effect of cytoskeleton integrity on the expression of COX-2 gene in osteoblasts induced by fluid shear stress[J/OL]. Chinese Journal of Stomatological Research(Electronic Edition), 2009, 3(04): 403-409.

目的

探讨细胞骨架完整性在流体剪切力诱导成骨细胞COX-2 基因表达中的作用。

方法

原代培养BALB/c 小鼠颅骨成骨细胞,采用细胞松弛素D(CD)破坏细胞骨架完整性;以12 dyne/cm2 的流体剪切力对成骨细胞加载1.5 h;分别应用实时荧光定量巢式PCR 和免疫荧光的方法检测COX-2 基因mRNA 和蛋白的表达水平,并对结果进行双因素方差分析。

结果

采用CD 破坏细胞骨架完整性,可以对流体剪切力诱导成骨细胞COX-2 mRNA和蛋白的表达起拮抗作用(P <0.05);在无流体剪切力加载条件下,CD 处理对COX-2 mRNA和蛋白的表达水平无显著影响(P >0.05);流体剪切力加载1.5 h 能使成骨细胞COX-2 mRNA和蛋白的表达水平显著升高(P <0.05);CD 处理可显著降低流体剪切力诱导成骨细胞COX-2 mRNA 和蛋白的表达水平(P <0.05)。

结论

保持细胞骨架完整性是流体剪切力诱导成骨细胞COX-2 基因表达过程中所必需的。

Objective

To study the effect of cytoskeleton integrity on the expression of COX-2 gene in osteoblasts induced by fluid shear stress.

Methods

BALB/c mouse primary osteoblasts were isolated by enzyme digestion technique. Osteoblasts were treated with or without Cytochalasin D and then loaded or unloaded by fluid shear stress at 12 dyne/cm2. The nested realtime PCR and immunofluorescence were performed to detect the expression levels of COX-2 mRNA and protein in the osteoblasts,respectively. Statistical analyses were performed using twoway ANOVA.

Results

Cytoskeleton integrity disruption with Cytochalasin D had antagonistic effect on the expression of COX-2 gene induced by fluid shear stress (P <0.05). Cytochalasin D had no significant effects on the expression levels of COX-2 mRNA and protein under unloaded condition (P >0.05). Fluid shear stress significantly increased the expression levels of COX-2 mRNA and protein in osteoblasts (P <0.05). Cytochalasin D significantly decreased the expression levels of COX-2 mRNA and protein in osteoblasts induced by fluid shear stress (P <0.05).

Conclusion

Cytoskeleton integrity in osteoblasts is essential for the expression of COX-2 gene induced by fluid shear stress.

表1 实验细胞分组
表2 用于实时定量RT-PCR 的引物设计
图1 1~4 组COX-2 mRNA 相对表达水平
图2 1~4 组的成骨细胞荧光图片,其中COX-2 蛋白为橙色荧光,细胞骨架呈绿色荧光。 (×400)
图3 1~4 组COX-2 蛋白的平均荧光密度
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