口腔医学研究 ›› 2020, Vol. 36 ›› Issue (9): 866-870.DOI: 10.13701/j.cnki.kqyxyj.2020.09.015

• 口腔干细胞研究 • 上一篇    下一篇

氟暴露对人牙周膜干细胞增殖及成骨分化的影响

邱吟枫1, 汤颖1, 沈忆芬1, 刘超1, 沈昊1, 顾永春1*, 于金华2*   

  1. 1.苏州市第九人民医院口腔科 江苏 苏州 215200;
    2.江苏省口腔疾病研究重点实验室 江苏 南京 210029
  • 收稿日期:2020-02-22 出版日期:2020-09-28 发布日期:2020-09-15
  • 通讯作者: *顾永春,E-mail: guyc7152@163.com;于金华,E-mail: yujinhua@njmu.edu.cn
  • 作者简介:邱吟枫(1989~),男,江苏苏州人,学士,住院医师,主要从事口腔临床医学工作。
  • 基金资助:
    江苏省口腔疾病研究重点实验室开放课题基金(编号:JSK-LOD-KF-1705);苏州市吴江区卫健委科教兴卫项目(编号:wwk201705)

Effects of Fluoride Exposure on Cell Proliferation and Osteogenic Differentiation of Periodontal Ligament Stem Cells

QIU Yinfeng1, TANG Ying1, SHEN Yifen1, LIU Chao1, SHEN Hao1, GU Yongchun1*, YU Jinhua2*   

  1. 1. Ninth People's Hospital of Suzhou, Suzhou 215200, China;
    2. Jiangsu Key Laboratory of Oral Diseases, Nanjing 210029, China
  • Received:2020-02-22 Online:2020-09-28 Published:2020-09-15

摘要: 目的: 探讨氟暴露对牙周膜干细胞(periodontal ligment stem cells, PDLSCs)增殖及成骨分化的影响。方法: 从人牙周膜组织中分离、培养得到PDLSCs,取第3代细胞行流式细胞分析干细胞表面标志物。分别用含0.1、1、10、20、40 mg/L的含氟培养基进行培养,检测不同浓度氟对PDLSCs细胞增殖(CCK-8法)、集落形成、细胞周期变化(流式细胞分析)、成骨分化能力(茜素红染色及Western blot分析ALP及RUNX2的蛋白表达水平)的影响。结果: 氟暴露对PDLSCs增殖与成骨分化的影响呈浓度及时间依赖性。0.1~10 mg/L氟对PDLSCs增殖无显著影响(P>0.05),但0.1及1 mg/L氟可显著促进其成骨分化,表现为钙化结节增多(P<0.05),ALP及RUNX2蛋白表达水平升高(P<0.05)。高浓度氟(20、40 mg/L)显著抑制PDLSCs增殖(P<0.05),具有较强的细胞毒性。结论: 氟暴露会影响PDLSCs的增殖与成骨分化。高浓度氟抑制PDLSCs增殖,而氟浓度较低时(0.1、1 mg/L)对PDLSCs增殖无显著影响,并可以促进细胞成骨分化。

关键词: 牙周膜间充质干细胞, 氟暴露, 细胞增殖, 细胞分化

Abstract: Objective: To disclose the biological effects of fluoride (F) exposure on cell proliferation and osteogenic differentiation of periodontal ligament stem cells (PDLSCs). Methods: PDLSCs were isolated and cultured from human periodontal ligament tissues. The surface markers of passage 3 cells were analyzed by flow cytometry. After treated with different concentrations of F (0.1-40 mg/L) for indicated period of time, the effects of F exposure on cell proliferation (CCK-8 assay), capability of colony-forming, cell circle phase changes (flow cytometry), as well as the osteogenic potential (Alizarin red staining and Western blot assay of expression of RUNX2 and ALP) were examined. Results: F exposure affected the cell proliferation and osteogenic differentiation of PDLSCs in a dose- and time-dependent manner. 0.1-10 mg/L F did not significantly affect cell proliferation (P>0.05), while 0.1 and 1 mg/L F significantly enhanced the osteogenic potential, which manifested as increased calcified nodules and upregualtion of RUNX2 and ALP expression (P<0.05). High dose of F (20 and 40 mg/L) significantly inhibited the cell proliferation (P<0.05), exhibiting remarkable cytotoxicity. Conclusion: F exposure affects the proliferation and osteogenic differentiation of PDLSCs. High concentration of F inhibits the proliferation of PDLSCs, while low F concentration (0.1 and 1 mg/L) has no significant effect on the proliferation of PDLSCs, and can promote cell osteogenic differentiation.

Key words: periodontal ligament stem cells, fluoride exposure, cell proliferation, cell differentiation