华西口腔医学杂志

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转录因子c-Jun和c-Fos在牙本质涎磷蛋白基因表达中的作用

何文喜1;牛忠英2;赵守亮1;李萍1;高杰;   

  1. 1.第四军医大学口腔医院  牙体科,陕西  西安 710032;2.解放军306医院  口腔治疗中心, 北京 100101
  • 收稿日期:2006-02-25 修回日期:2006-02-25 出版日期:2006-02-20 发布日期:2006-02-20
  • 通讯作者: 何文喜,Tel:029-83376078
  • 作者简介:何文喜(1974-),男,湖北人,主治医师,博士
  • 基金资助:

    国家自然科学基金资助项目(30200315)

Transcriptional Regulation of Dentin Sialophosphoprotein by c-Jun/c-Fos

HE Wen-xi1, NIU Zhong-ying2, ZHAO Shou-liang1, Li Ping1, Gao Jie1   

  1. 1. Dept. of Conservative Dentistry, College of Stomatology, The Fourth Military Medical University, Xi'an 710032, China; 2. Dept. of Dentistry, PLA 306 Hospital, Beijing 100101, China
  • Received:2006-02-25 Revised:2006-02-25 Online:2006-02-20 Published:2006-02-20

摘要: 目的 研究成牙本质细胞内转录因子c-Jun和c-Fos在牙本质涎磷蛋白(DSPP)基因转录调控中的作用, 探索成牙本质细胞内DSPP基因表达的调控机制。方法 细胞免疫组化观察MDPC-23细胞内c-Jun和c-Fos蛋白分子的表达。瞬时转染和报告基因检测c-Jun和c-Fos在DSPP基因转录中的作用。结果 MDPC-23细胞表达c-Jun和c-Fos蛋白,c-Jun和c-Fos主要分布在MDPC-23细胞胞核。c-Jun或c-Fos过表达均显著抑制DSPP基因启动子活性。结论 证实成牙本质细胞内转录因子c-Jun和c-Fos参与下调DSPP基因表达。

关键词: 牙本质涎磷蛋白, c-Jun, c-Fos, 基因转录

Abstract:

bjective To investigate the role of c-Jun and c-Fos as transcriptional factors in regulation of dentin sialophosphoprotein(DSPP) gene by a promoter-luciferase reporter gene construct in odontoblast cell line MDPC-23. Methods Endogenous c-Jun or c-Fos protein was determined by immunocytochemistry. The role of c-Jun or c-Fos in transcription of DSPP was investigated in co-transfection experiments using promoter-luciferase reporter gene construct containing the sequence between -791 bp and +54 bp of mouse DSPP gene. Results c-Jun and c-Fos was expressed by MDPC-23 cells, and located in the nucleus of MDPC-23 cells. Overexpression of c-Jun or c-Fos significantly inhibited luciferase activity of DSPP promoter. Conclusion These findings suggest c-Jun and c-Fos downregulated the transcription of DSPP gene as a transcriptional factor in odontoblast.

Key words: dentinsialophosphoprotein, c-Jun, c-Fos, genetranscription