华西口腔医学杂志

• 基础研究 • 上一篇    下一篇

功能矫形前伸下颌后大鼠髁突软骨细胞睾酮的分布变化规律

李小兵,陈开云,周征,罗颂椒   

  1. 四川大学华西口腔医院 正畸科,四川 成都610041
  • 收稿日期:2004-02-25 修回日期:2004-02-25 出版日期:2004-02-20 发布日期:2004-02-20
  • 通讯作者: 李小兵,Tel:028-85501425
  • 作者简介:李小兵(1966-),男,四川人,副教授,博士
  • 基金资助:
    国家自然科学基金资助项目(39470760)

Expression of Testosterone in the Rapid Growing Rat Condylar Cartilage and the Expression Changes after the Function Mandibular Advacement

LIXiao-bin,CHENKai-yun,ZHOU Zheng,LUO Song-jiao   

  1. Dept.of Orthodontics,West China College ofStomatology,Sichuan University,Chengdu610041,China
  • Received:2004-02-25 Revised:2004-02-25 Online:2004-02-20 Published:2004-02-20

摘要:

目的 研究快速生长期大鼠髁突软骨细胞睾酮的表达,并探讨功能矫形对髁突软骨细胞睾酮表达的影响。方法 实验组戴自制模拟的功能矫治器引导大鼠下颌前伸,在实验第3天、1、2、3及4周处死大鼠,应用免疫组织化学SP法检测睾酮在髁突软骨细胞上的表达特点。结果 ①实验组、对照组大鼠髁突软骨细胞各层都有睾酮的阳性免疫染色,大鼠各层细胞中以成熟层及移行层阳性强度较高,明显高于生发层及过渡层,其中成熟层染色强度最高;②随着大鼠的青春期生长发育,髁突软骨细胞各层睾酮染色强度出现不同的变化特点;③实验第2及第 3周组大鼠髁突成熟层软骨细胞睾酮染色强度明显高于对照各组,差异具有统计学意义(P<0·05)。结论 睾酮参与了大鼠髁突软骨细胞成熟的调控,并介导了功能矫形的机械刺激作用,使髁突软骨细胞的增生分化功能增强,髁突软骨增生。

关键词: 睾酮, 功能矫形, 髁突软骨

Abstract:

Objective To investigate the expressions ofTestosterone in the condylar cartilage of rapid growing rats.Methods  The mimic functional appliances were used in experiment groups and rats were killed after 3 days , 1week, 2weeks, 3weeks and 4weeks. Immunohistochemical technique was used to detect the expression ofT.Results Twas expressed throughout the condy- lar cartilage. TheHighest expressionswere in mature layers of both experiment and control groups. Alongwith the maturation, the expressions of T in the condylar cartilage were changed respectively, and the immunostain levels in the mature layer of experiment groups 2 and 3 weekswere higherthan those of control groups (P<0·05).Conclusion ①Tis a member of cartilage growth and development control system.②The orthopedic mechanism of functional appliance may be conducted by T.

Key words: testosterone, functional orthopedics, condylar cartilage