华西口腔医学杂志

• 基础研究 • 上一篇    下一篇

成骨细胞中激活剂蛋白-1家族成员对流体剪切力的响应

朱赴东,赵士芳   

  1. 浙江大学医学院附属口腔医院 口腔颌面外科,浙江 杭州310006
  • 收稿日期:2005-10-25 修回日期:2005-10-25 出版日期:2005-10-20 发布日期:2005-10-20
  • 通讯作者: 赵士芳,Tel:0571-87217388
  • 作者简介:朱赴东(1977-),男,浙江人,博士研究生
  • 基金资助:

    浙江省自然科学基金资助项目(491060-N20078)

ctivating Protein-1 Members in Response to Changes of Wall-shear Stress in Osteoblastic Cells

ZHUFu-dong,ZHAO Shi-fang   

  1. Dept.ofOral andMaxillofacial Surgery,TheAffiliatedHospital,School ofStomatology,Zhejiang University,Hang- zhou310006,China
  • Received:2005-10-25 Revised:2005-10-25 Online:2005-10-20 Published:2005-10-20

摘要: 目的 研究激活剂蛋白-1家族成员FosB,c-Fos, c-Jun,JunD,JunB ,Fra-1和Fra-2对不同大小的流体剪切力 的生理响应。方法 对新生SD大鼠颅盖骨中分离出的成骨细胞施加流体剪切力,分成4组,每组加载的水平剪切 力大小分别为0·8 Pa,1·2 Pa,1·4 Pa及1·6 Pa。每组在加载剪切力0 min,10 min,15 min,30 min,60 min后分别用逆 转录聚合酶链反应测试FosB,c-Fos,c-Jun,JunD,JunB ,Fra-1和Fra-2 mRNA的表达。结果 FosB,c-Fos,c-Jun,JunD和 JunB在水平剪切力加载15 min时表达明显增高(P<0·05),Fra-1和Fra-2在流体剪切力刺激后都有增高,但是各个 时间组之间却没有统计学差异(P>0·05)。当剪切力为1·2 Pa时,FosB,c-Fos,c-Jun,JunD和JunB mRNA表达明显高 于其他各组和空白对照组(P<0·05)。结论 FosB,c-Fos, c-Jun,JunD,JunB,Fra-1和Fra-2等参与了力学刺激引发细 胞响应的过程。当成骨细胞受到外界力学刺激后,激活剂蛋白-1在外界信号刺激引起的信息传递级联反应中起重 要的偶联作用,充当核内第三信使和基因转录调控的分子开关。

关键词: 流体剪切力, 成骨细胞, 激活剂蛋白-1

Abstract: Objective To observe activating protein-1(AP-1) members in response to changes ofwall-shear stress in osteoblas- tic cellsin vitro.Methods Isolated and purified osteoblastic cells from the calvaria of newborn SD rats were cultured and sub- cultured. The third generation cellswere subjected towall-shear stress of 0.8 Pa,1.2 Pa,1.4 Pa and 1.6 Pa separately. Gene ex- pression of the seven AP-1 members were studied before (0 h) and 10 min,15 min,30 min,60 min after treated with wall-shear stress.Results The expression of FosB,c-Fos, c-Jun,JunD and JunB mRNA increased transiently after application of 1.2 Pa wall-shear stress in osteoblastic cells compared to 0.8 Pa ,1.4 Pa and 1.6 Pa stress, and peaked at 15 min.Conclusion Me- chanical environment changes in osteoblastic cells induced a dramatic induction of most of the AP-1 members.

Key words: wall-shear stress, osteoblastic cells, activating protein-1