口腔医学研究 ›› 2020, Vol. 36 ›› Issue (7): 654-657.DOI: 10.13701/j.cnki.kqyxyj.2020.07.011

• 牙周病学研究 • 上一篇    下一篇

EBV LMP1对牙龈上皮细胞促炎因子的调控及机制研究

刘芳芳1, 邱忠营2, 王艳丽1*   

  1. 1.西安市中心医院口腔科 陕西 西安 710003;
    2.西安医学院基础医学部,陕西省脑疾病重点实验室 陕西 西安 710021
  • 收稿日期:2019-11-21 出版日期:2020-07-28 发布日期:2020-07-24
  • 通讯作者: 王艳丽,E-mail:xiatian1135@126.com
  • 作者简介:刘芳芳(1987~),女,陕西西安人,硕士,主治医师,研究方向:口腔种植及牙周病学。
  • 基金资助:
    陕西省自然科学基础研究计划(编号:2018JQ8003)

Regulation and Mechanism of EBV LMP1 on Inflammatory Factors of Gingival Epithelial Cells

LIU Fangfang1, QIU Zhongying2, WANG Yanli1*   

  1. 1. Department of Stomatology, Xi'an Central Hospital, Xi'an 710003, China;
    2. School of Basic Medical Sciences & Shanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an 710021, China
  • Received:2019-11-21 Online:2020-07-28 Published:2020-07-24

摘要: 目的: 探究EB病毒潜在膜蛋白1(Epstein-barr virus latent membrane protein 1, EBV LMP1)对牙龈上皮细胞促炎因子的调控及机制。方法: 0.05 μg和0.2 μg pSG-GFP-LMP1质粒转染Ca9-22细胞,分别于24 h和48 h后荧光显微镜下观察GFP在Ca9-22细胞中的表达情况,Real-time PCR和Western blot检测LMP1 mRNA和蛋白表达,确定转染是否成功。应用0.2 μg pSG-GFP-LMP1质粒转染Ca9-22细胞,分别于24 h和48 h进行Real-time PCR和ELISA检测细胞中IL-8 mRNA和蛋白表达。应用0.05 μg和0.2 μg pSG-GFP-LMP1质粒转染Ca9-22细胞,48 h后Real-time PCR和ELISA检测细胞中IL-8 mRNA和蛋白表达,Western blot检测p-IκBα、IκBα、p-p65和p65蛋白表达。结果: pSG-GFP-LMP1质粒转染Ca9-22细胞基因高表达,转染成功。0.2 μg质粒转染Ca9-22细胞24 h和48 h后,实验组IL-8 mRNA和蛋白表达均显著高于对照组(P<0.01)。0.05 μg和0.2 μg质粒转染Ca9-22细胞48 h后,实验组IL-8 mRNA和蛋白表达以及p-IκBα、p-p65和p65蛋白表达显著高于对照组(P<0.01),且随着剂量增大,表达增强,实验组IκBα蛋白表达显著低于对照组(P<0.01),且随着剂量增大,表达减弱。结论: EBV LMP1可能通过激活NF-κB磷酸化进而诱导Ca9-22细胞中IL-8的表达。

关键词: EB病毒潜在膜蛋白1, 白细胞介素-8, 核因子-κB, 牙龈上皮细胞

Abstract: Objective: To study the regulation of EBV LMP1 on proinflammatory factors of Ca9-22 cells as well as its mechanism. Methods: Ca9-22 cells were transfected with 0.05 μg and 0.2 μg pSG-GFP-LMP1 plasmids. The expressions of GFP were observed under fluorescence microscope, the mRNA and protein levels of LMP1 were measured by Real-time PCR and ELISA after 24 h and 48 h, respectively. Ca9-22 cells were transfected with 0.2 μg pSG-GFP-LMP1 plasmids, and the mRNA and protein levels of IL-8 were measured by real-time PCR and ELISA at 24 h and 48 h. Ca9-22 cells were transfected with 0.05 μg and 0.2 μg pSG-GFP-LMP1 plasmids, the protein levels of p-IκBα, IκBα, p-p65, and p65 were measured by western blot. Results: Ca9-22 cells transfected with the pSG-GFP-LMP1 plasmid could be expressed successfully. After transfection of Ca9-22 cells with 0.2 μg plasmid, the mRNA and protein levels of IL-8 in the experimental group were significantly increased (P<0.01). 48h after transfection, the mRNA and protein levels of IL-8, the protein levels of p-IκBα, p-p65, and p65 in the experimental group were significantly increased (P<0.01). Furthermore, the expressions were increased in a dose-dependent manner. The protein levels of IκBα was decreased in the experimental group (P<0.01) . Conclusion: EBV LMP1 may induce IL-8 expression in Ca9-22 cells by activating NF-κB phosphorylation.

Key words: Epstein-Barr virus latent membrane protein 1, IL-8, NF-κB, Ca9-22