中国临床解剖学杂志 ›› 2010, Vol. 28 ›› Issue (6): 680-.

• 实验研究 • 上一篇    下一篇

流体剪切应力对大鼠骨髓间充质干细胞MT1-MMP基因表达的影响

唐 杰1, 孙晓东2, 袁雅红3, 李瑞明3, 彭兴春1, 王汉琴1,3   

  1. 1.湖北医药学院解剖学教研室;  2.湖北医药学院基础医学研究所;   3.胚胎干细胞研究湖北省重点
    实验室,湖北医药学院附属太和医院,  湖北   十堰    442000
  • 收稿日期:2010-05-10 出版日期:2010-11-25 发布日期:2010-12-01
  • 通讯作者: 王汉琴,E-mail:hanqinwang111@yahoo.com.cn , Tel:(0719)8891131 E-mail:tj71411@163.com
  • 作者简介:唐 杰(1971-),男,湖北十堰人,硕士,讲师,主要从事血管生物力学研究,Tel:(0719)8875314
  • 基金资助:

    国家自然科学基金(30770535);湖北省高等学校优秀中青年科技创新团队计划(T201008);湖北医药学院博士启动金(2007QDJ7)

Effects of laminar shear stress on expression of MT1-MMP in rat bone marrow-derived mesenchymal stem cells

TANG Jie, SUN Xiao-dong, YUAN Ya-hong, et al.   

  1. Department of Anatomy, Hubei University of Medicine, Shiyan, Hubei 442000, China
  • Received:2010-05-10 Online:2010-11-25 Published:2010-12-01

摘要:

目的 探讨流体剪切应力对大鼠骨髓间充质干细胞(rat bone marrow-derived mesenchymal  stem cells,rMSCs)中膜型基质金属蛋白酶1(Membrane type-1 matrix metalloproteinase, MT1-MMP)基因表达的影响,为阐明应力诱导rMSCs分化的分子机制提供一些实验依据。 方法 应用平行平板流动腔系统,给rMSCs施加不同大小和不同加载时间的层流剪切应力,用real-time PCR检测MT1-MMP基因mRNA的表达水平。 结果 5, 15, 30 dynes/cm2剪切应力均能刺激rMSCs的MT1-MMP mRNA表达,且其作用呈时间依赖和强度依赖。p38抑制剂(SB202190)可以明显抑制这种作用, 而PI3K抑制剂(wortmannin)却增强了这种效果。 结论 流体剪切应力可诱导rMSCs的MT1-MMP基因表达,其表达量与刺激时间和剪切应力的强度密切相关,这种作用可能通过p38MAPK和PI3K/Akt信号通路。

关键词: 间充质干细胞, 膜型基质金属蛋白酶1, 剪切应力

Abstract:

Objective To investigate the effect of laminar shear stress on the expression of membrane type-1 matrix metalloproteinase(MT1-MMP)in rat bone marrow-derived mesenchymal stem cells (rMSCs). Methods rMSCs were isolated from SD rat lower extremities and loaded by laminar shear stress with the parallel-plate flow chamber system, then the expression of MT1-MMP mRNA of rMSCs was examined by real-time PCR. Results Shear stress with different magnitude of 5, 15, 30 dynes/cm2 all induced MT1-MMP mRNA expression, especially high shear stress, 30 dynes/cm2, which was time-dependent. The expression of MT1-MMP mRNA was inhibited by SB202190, an inhibitor of p38, but enhanced by wortmannin, an inhibitor of PI3K/Akt. Conclusion Shear stress can activate the expression of MT1-MMP. The amount of MT1-MMP expression is closely related to stimulating time and the strengths of shear stress, and p38MAPK and PI3K/Akt signal pathway may play a critical role during the process.

Key words: Mesenchymal stem cells, Mmembrane type-1 matrix metalloproteinase, Laminar shear stress

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