华西口腔医学杂志

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不同孕期大鼠正畸牙移动牙周骨桥蛋白mRNA表达变化的规律

莫水学1, 2, 陈扬熙3   

  1. 1.广西医科大学口腔医院正畸科, 广西南宁530021; 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正畸科, 四川成都610041
  • 收稿日期:2007-06-25 修回日期:2007-06-25 出版日期:2007-06-20 发布日期:2007-06-20
  • 通讯作者: 陈扬熙, Tel:028- 85503477
  • 作者简介: 莫水学(1973-),男,广西人,讲师,博士
  • 基金资助:

    国家自然科学基金资助项目(30371560)

Per iodontal Expr ession Pattern of Osteopontin mRNA Induced by Or thodontic Tooth Movement in Pr egnant and Non- pr egnant Rats

MO Shui- xue1,2, CHEN Yang- xi3   

  1. 1. Dept. of Orthodontics, College of Stomatology, Guangxi Medical University,Nanning 530021, China;2. Key. Laboratory of Oral Biomedical Engineering of Ministry of Education, Sichuan University, Chengdu 610041, China;3. Dept. of Orthodontics, West China College of Stomatology,Sichuan University, Chengdu 610041, China
  • Received:2007-06-25 Revised:2007-06-25 Online:2007-06-20 Published:2007-06-20
  • Contact: CHEN Yang- xi, Tel:028- 85503477

摘要:

目的观察不同孕期大鼠正畸牙施力后牙周组织骨桥蛋白(OPN)mRNA的表达,探讨其在孕期正畸牙周改建中的可能作用。方法将90只大鼠按所处孕期阶段和加力方式随机分3组,正常怀孕对照组30只、怀孕加力组30只和非孕加力组30只。怀孕加力组和非孕加力组大鼠戴入牙移动装置,加力使其上颌第一磨牙朝近中移动。分别在妊娠第6天、第12天和第19天处死动物,取上颌骨及牙齿标本,采用原位杂交法检测牙周组织OPN mRNA的表达。结果怀孕加力组大鼠牙周组织OPN mRNA的表达强于非孕加力组,且具有孕中期表达最强、晚期稍低而早期最低的特点;怀孕加力组和非孕加力组压力侧OPN mRNA表达都增强;怀孕加力组各孕期的表达具有显著差异。结论孕鼠牙周组织压力侧骨改建的骨吸收过程中,OPN mRNA起到了一定作用,而且OPN mRNA的表达受孕酮的调控。

关键词: 正畸牙移动, 孕酮, 骨桥蛋白

Abstract:

Objective Through orthodontic tooth movement in the pregnant and non- pregnant rats, to investigate the osteopontin(OPN)mRNA expression pattern in the periodontal tissues, and to probe its possible roles in or - thodontic periodontal remodeling. Methods Fixed appliances were used to mesially move the rats′maxillary first molars. In situ hybridization method was used to detect the expression changes of OPN mRNA in periodontal tissues. Results Compared to the non- pregnant rats, the expression of OPN mRNA in periodontal cells of the pregnant rats was more intensive. During the gestational period, the expression intensity had significant difference at different pregnant stages. The highest expressions occurred at the mid- pregnant stage, less at the late- stage and lest at the early- stage. Conclusion Under the pregnant state, the expression of OPN mRNA in periodontal tissues may be up- regulated by increased serum progesterone level.

Key words: orthodontic tooth movement, progesterone, osteopontin