华西口腔医学杂志

• 基础研究 •    下一篇

下颌骨骨折愈合过程中整合素β_1mRNA表达的实验研究

李声伟,刘少华,田卫东,程刚,刘磊   

  1. 610041 四川大学华西口腔医学院
  • 收稿日期:2001-12-25 修回日期:2001-12-25 出版日期:2001-12-20 发布日期:2001-12-20

A Study on mRNA Expression Levels of IntegrinB1During the Healing Process of Mandibular Fractures

Li Shengwei, Liu Shaohua, Tian Weidong, et al   

  1. College of Stomatology, West China University of MedicalSciences
  • Received:2001-12-25 Revised:2001-12-25 Online:2001-12-20 Published:2001-12-20

摘要:

目的:探讨下颌骨骨折愈合过程中整合素B1mRNA时空表达的变化。方法:用地高辛标记的整合素B1mRNA 的寡核苷酸探针,采用组织切片原位杂交技术,观察下颌骨骨折愈合过程中整合素B1mRNA的时空表达变化。结果:骨折愈合过程中,整合素B1mRNA在骨组织细胞,特别是成骨细胞中广泛表达;阳性染色出现于细胞浆和细胞核中;骨组织中的整合素B1mRNA在骨折7 d后表达增强,14至30 d最强,60至90 d时基本接近正常。结论:下颌骨骨折的愈合过程中,骨组织细胞中整合素B1mRNA表达增强,提示整合素B1对骨折的愈合过程具有重要作用。

关键词: 整合素β1mRNA, 骨折愈合, 原位杂交

Abstract:

Objective:The aim of this study was to investigate the spatial and temporal mRNA expression changes of integrinB1during the healing process ofmandibularfractures.Methods:The in situ hybridizationwas performed using digoxigenin-labeled integrinB1 mRNA oligonucleotide probe. During the healing process of mandibular fractures, the staining pattern ofB1mRNAwas examined both spatially and time-dependently.Results:IntegrinB1was widely present in the cells of the fractured bone, especially in os- teoblasts. The positive stainingwas observed in the cytoplasm and nucleolus of osteoblasts. After7 days of fracture, the expression level of integrinB1increased. The peak appeared between the 14th and the 30th day, and almost recovered to normal between the 60th and 90th day.Conclusion:During the healing process ofmandibularfracture, the expression level of integrinB1in bone, es- pecially in osteoblasts rose. It is suggested that integrinB1may play an important role in the fracture healing process.

Key words: integrinB1, message RNA, fracture healing, in situ hybridization