华西口腔医学杂志

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永生化成牙本质细胞表达牙本质基质蛋白的实验研究

王捍国,肖明振,赵守亮,郝建军,张 旻   

  1. 第四军医大学口腔医院 牙体牙髓病科,陕西 西安710032
  • 收稿日期:2005-12-25 修回日期:2005-12-25 出版日期:2005-12-20 发布日期:2005-12-20
  • 通讯作者: 肖明振, Tel:029-83376079
  • 作者简介:王捍国(1974-),男,重庆人,讲师,博士
  • 基金资助:

    国家自然科学基金资助项目(39970792,30270374);教育部回国人员启动基金资助项目(2000HG003);第四军医大学学术新人资助基金资助项目(2003年)

Immortalized Human Odontoblast-like Cell Line Expressed Dentin Extracellular Matrixin vitro

WANGHan-guo,XIAO Ming-zhen,ZHAO Shou-liang,HAO Jian-jun,ZHANG Min   

  1. Dept.ofOperative Dentistry and Endodontics,College ofStoma- tology,The Fourth MilitaryMedical University,Xi′an710032,China
  • Received:2005-12-25 Revised:2005-12-25 Online:2005-12-20 Published:2005-12-20

摘要:

目的 探讨永生化人成牙本质细胞样细胞系hTERT-hOd-l表达牙本质基质蛋白的情况。方法 矿化液培养hTERT-hOd-l细胞5周,检测骨钙素(OC)分泌量和碱性磷酸酶(ALP)活性。采用免疫组织化学、RT-PCR和原位杂交方法检测Ⅰ型胶原、骨涎蛋白(BSP)、牙本质基质蛋白1 (DMP1)以及成牙本质细胞标志物牙本质涎磷蛋白(DSPP) 和牙本质涎蛋白(DSP)在细胞中的表达。结果 在矿化液诱导下,hTERT-hOd-l细胞ALP活性和OC分泌量升高。 hTERT-hOd-l细胞在mRNA水平上表达BSP、DMP1和DSPP,在蛋白质水平上表达DSP和Ⅰ型胶原。结论 hTERT- hOd-l细胞在体外表达牙本质基质蛋白,具有矿化的潜能。

关键词: 成牙本质细胞, 牙本质基质蛋白, 矿化

Abstract: Objective To determine whether dentin matrix proteins were expressed by the human odontoblast-like cell line hTERT-hOd-lin vitro.Methods Collagen typeⅠ, bone sialoprotein (BSP),dentin matrix protein 1 (DMP1) and the marker for odontoblast, dentin sialophosphoprotein (DSPP) and dentin sialoprotein(DSP) were detected in these cells by immunohistoche- mistry, RT-PCR and in situ hybridization. During being cultured in mineralizingmedium for 5 weeks, the secretion of OC and ac- tivity of ALP were measured once aweek.Results DSPP, DMP1,BSP and collagen typeⅠwere expressed in hTERT-hOd-l ei- ther at mRNA or protein level. Underthe induction of mineralizingmedium, the cells showed higher activity of ALP and increased secretion of OC.Conclusion hTERT-hOd-l expressed dentin extracellularmatrixin vitro, which means the cell line has the po- tential of mineralization.

Key words: odontoblast, dentin extracellular matrix, mineralization