华西口腔医学杂志

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微丝对牵张应变诱导的人牙周膜成纤维细胞中环氧合酶-2表达的影响

熊培颖;黄生高;张建兴   

  1. 中南大学湘雅二医院  口腔科,湖南  长沙 410011
  • 收稿日期:2006-08-25 修回日期:2006-08-25 出版日期:2006-08-20 发布日期:2006-08-20
  • 通讯作者: 黄生高,Tel:13973197181

ension-force Induced Cyclooxygenase-2 Expression Mediated by Microfilament in Human Periodontal Liga-ment Fibroblast

XIONG Pei-ying, HUANG Sheng-gao, ZHANG Jian-xing   

  1. Dept. of Stomatology, The Second Xiangya Hospital, Central South University, Changsha 410011, China
  • Received:2006-08-25 Revised:2006-08-25 Online:2006-08-20 Published:2006-08-20

摘要:

目的  探讨微丝的聚合在人牙周膜成纤维细胞(hPDLFs)正畸力信号传导中的作用。方法  将培养的hPDLFs接种于膜式细胞牵张应变施加装置上,随机分为对照组、单纯加力组、加力+细胞松弛素组。对照组牵张应变量为0;单纯加力组和加力+细胞松弛素组设定细胞静态牵张应变量为18%,加载时间分别为8 h、16 h和24 h。加力+细胞松弛素组在施加牵张应变量前加入5 μg/mL的细胞松弛素B来破坏微丝的聚集作用。用免疫组织化学法检测细胞中环氧合酶-2(COX-2)的表达,测定灰度值并进行统计学处理。结果  单纯加力组在18%牵张应变量作用下,COX-2表达随着加载时间的增加而增强;加力+细胞松弛素组在18%牵张应变量作用下,COX-2的表达明显降低,且各加载时间组间表达无差别。结论  微丝的聚合介导了hPDLFs中正畸力信号传导,破坏微丝的聚合作用将阻碍力学信号的传导,从而降低COX-2的表达。

关键词: 人牙周膜成纤维细胞, 环氧合酶-2, 力信号传导, 微丝

Abstract:

Objective  To study the role of microfilament polymerization in menchanotransduction by human perio- dontal ligament fibroblast(hPDLFs). Methods  In tension-force group, hPDLFs were treated by tension-force values of 18% for 8 h, 16 h, 24 h. In tension-force and inhibitor group, the sample was treated with 5 μg/mL cytochalasin B before using tension-forece. Each sample was collected and the expression of cyclooxygenase-2 was measured by using immunohistoche staining. Results  In tension-force group, the expression of cyclooxygenase-2 enhanced with the extension of loading time. In tension-force and inhibitor group, cyclooxygenase-2 expression was depressed and had no relation with loading time. Conclusion  Tension-force induced cyclooxygenase-2 expression is mediated by microfilament, disruption of the microfilament polymerization will destroy mechanotransduction in hPDLFs.

Key words: human periodontal ligament fibroblast, cyclooxygenase-2, menchanotransduction, microfilament