中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (14): 2261-2266.doi: 10.3969/j.issn.2095-4344.2015.14.022

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

人牙髓细胞分化过程中DNA甲基胞嘧啶双加氧酶TET家族的表达

饶利佳,李启梦,李金铃,徐 琼   

  1. 中山大学光华口腔医学院•附属口腔医院牙体牙髓病科;广东省口腔医学重点实验室, 广东省广州市 510055
  • 修回日期:2015-03-02 出版日期:2015-04-02 发布日期:2015-04-02
  • 通讯作者: 徐琼,博士,主任医师,主要从事口腔牙体牙髓病诊治工作。中山大学光华口腔医学院?附属口腔医院牙体牙髓病科;广东省口腔医学重点实验室, 广东省广州市 510055
  • 作者简介:饶利佳,女,1988年生,广东省梅州市,汉族,中山大学在读硕士。
  • 基金资助:

    国家自然科学基金项目(81170953)

Expression pattern of ten-eleven translocation family during differentiation of human dental pulp cells

Rao Li-jia, Li Qi-meng, Li Jin-ling, Xu Qiong   

  1. Department of Conservative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, Guangdong Province, China
  • Revised:2015-03-02 Online:2015-04-02 Published:2015-04-02
  • Contact: Xu Qiong, M.D., Chief physician, Department of Conservative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, Guangdong Province, China
  • About author:Rao Li-jia, Studying for master’s degree, Department of Conservative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, Guangdong Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81170953

摘要:

背景:DNA甲基胞嘧啶双加氧酶TET家族可将甲基胞嘧啶氧化为羟甲基胞嘧啶,参与机体DNA去甲基化,调控细胞增殖与分化,但其在牙髓细胞中的表达模式仍不清楚。

目的:检测TET家族在牙髓细胞成牙本质分化过程中的表达模式。
方法:采用酶消化法分离培养人牙髓细胞,细胞免疫荧光法检测TET家族的表达及分布;Western Blot检测TET家族在牙髓细胞传代培养(P1-P7代)中的表达规律;对第3代牙髓细胞矿化诱导7,14 d,qRT-PCR法检测矿化诱导第0,7,14 d的TET家族mRNA水平,Western Blot法检测其蛋白量的表达变化。

结果与结论:TET家族在人牙髓细胞的细胞质和细胞核中均有表达。在牙髓细胞体外传代培养过程中,TET1蛋白在P1-P6代随细胞传代呈上升趋势,TET2蛋白在P2和P3代细胞中表达增强(P < 0.05),TET3表达量在不同细胞代数之间差异无显著性意义(P > 0.05)。细胞经矿化诱导后,TET1,TET2和TET3的mRNA和蛋白表达量均升高(P < 0.05)。以上结果提示TET家族可能参与调控牙髓细胞成牙本质分化进程。


中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程


全文链接:

关键词: 干细胞, 分化, 牙髓细胞, 表观遗传, DNA甲基化双加氧酶, DNA甲基化, DNA去甲基化, 甲基胞嘧啶, 羟甲基胞嘧啶, 矿化诱导, 细胞分化, 国家自然科学基金

Abstract:

BACKGROUND: Ten-eleven translocation (TET) family proteins are recently discovered DNA dioxygenases that convert methylcytosine to hydroxymethyl cytosine, which is essential for regulating cell proliferation and differentiation, but the expression pattern of TET family proteins in human dental pulp cells is still unclear.

OBJECTIVE: To investigate the expression pattern of TET family proteins during the differentiation of human dental pulp cells.
METHODS: Cellular distribution and expression of TET family proteins were determined by immunofluorescence in human dental pulp cells that were cultured and isolated using digestion method. The protein levels of TETs during cell passage (P1-P7) were detected with western blot assay, and their potential changes during odontogenic induction (7 and 14 days) were confirmed using real-time quantitative PCR and western blot analyses at mRNA and protein levels, respectively.
RESULTS AND CONCLUSION: All TETs were expressed in the nucleus and the cytoplasm of human dental pulp cells During serial cell passage, TET1 protein expression was increased until the 6th passage, TET2 significantly increased at the 2nd and 3rd passages and then decreased (P < 0.05), and TET3 showed no statistically significant change (P > 0.05). Both mRNA and protein expression levels of all TETs were elevated during odontogenic induction (P < 0.05). These results indicated that TETs may contribute to cell differentiation of human dental pulp cells.

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程


全文链接:

Key words: Stem Cells, Dental Pulp, Cell Differentiation, Tooth Remineralization

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