华西口腔医学杂志

• 基础研究 • 上一篇    下一篇

细胞内信号转导分子——Smad7在人牙胚发育中的表达和意义

包柳郁,牛忠英,史俊南,汪平   

  1. 710032 第四军医大学口腔医院牙体病科(包柳郁,史俊南,汪 平),解放军306医院口腔科(牛忠英)
  • 收稿日期:2003-12-25 修回日期:2003-12-25 出版日期:2003-12-20 发布日期:2003-12-20
  • 基金资助:
    本课题为国家自然科学基金资助项目(编号39870789)

The Expression and Function of Smad7 During Human Tooth Germ Development

BAO Liuyu*,NIUZhongying,SHIJunnan,et al.   

  1. *Department ofOperative Dentistry and Endodontics,Stomatological Col- lege,the Fourth MilitaryMedical University,Xi’an710032,China
  • Received:2003-12-25 Revised:2003-12-25 Online:2003-12-20 Published:2003-12-20

摘要:

目的 探讨Smad7在TGF-β调节牙胚发育过程中的作用。方法 采用免疫组化ABC法观察Smad7在人牙胚发育各个时期的表达分布及其变化情况。结果 人牙胚发育各个时期均表达Smad7,但各期分布模式有所不同。Smad7在不同发育时期牙胚中的分布与TGF-β及其特异的信号转导分子Smad2、3有相似之处。结论 Smad7 可能在TGF-β调节成釉细胞和成牙本质细胞分化的信号转导通路中起一定的作用。

关键词: Smad7, 牙胚发育, 免疫组织化学

Abstract:

Objective To observe the temporal and spatial expression of Smad7 during human tooth germ development and evaluate the effect of Smad7 on tooth germ development.Methods The expression of Smad7 and its changes at different stag- es of human tooth germwere detected by using immunohistochemical staining.Results Smad7 was expressed at all stages of tooth germ, but the distribution patterns at various stageswere different. It indicated thattemporal and spatial expressingmode of Smad7 during human tooth germ developmentwas specific, whichwas similartothat ofTGF-βand its signal transducerSmad2/3.Conclu- sion Smad7 might play an important role in TGF-βintracellular signaling for modulating the differentiation of ameloblasts and odontoblasts.

Key words: Smad7, tooth germ development, immunohistochemistry