中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (3): 391-395.doi: 10.3969/j.issn.2095-4344.0398

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

小鼠慢性根尖周炎中RANKL的表达

仉  红,叶丹丹,董  明,牛卫东   

  1. (大连医科大学口腔医学院牙体牙髓教研室,辽宁省大连市   116041)
  • 收稿日期:2018-04-27 出版日期:2019-01-28 发布日期:2019-01-28
  • 通讯作者: 牛卫东,博士,教授,硕士生导师,大连医科大学口腔医学院牙体牙髓教研室,辽宁省大连市 116041
  • 作者简介:仉红,女,1990年生,山东省新泰市人,汉族,大连医科大学在读硕士,医师,主要从事牙体牙髓研究。
  • 基金资助:

    国家自然科学基金(81171538),项目负责人:仉红

Expression of RANKL in chronic periapical periodontitis in mice

Zhang Hong, Ye Dandan, Dong Ming, Niu Weidong   

  1.  (Department of Endodontics, School of Stomatology, Dalian Medical University, Dalian 116041, Liaoning Province, China)
  • Received:2018-04-27 Online:2019-01-28 Published:2019-01-28
  • Contact: Niu Weidong, MD, Professor, Master’s supervisor, Department of Endodontics, School of Stomatology, Dalian Medical University, Dalian 116041, Liaoning Province, China
  • About author:Zhang Hong, Master candidate, Physician, Department of Endodontics, School of Stomatology, Dalian Medical University, Dalian 116041, Liaoning Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81171538 (to ZH)

摘要:

文章快速阅读:

文题释义:
慢性根尖周炎:是指根尖周围组织包括牙骨质、牙槽骨和牙周膜,由于多种细菌等病原微生物的相互作用形成的慢性感染性疾病。慢性根尖周炎大多是牙髓坏死的结局,也可因严重的牙周袋内的感染物质侵袭造成。慢性根尖周炎最终会导致牙槽骨的破坏吸收,甚至造成牙齿脱落。
RANKL:全称receptor activator of NF-κBligand,简称RANKL,是核因子κB受体活化因子配体,TNF家族中的一员,为Ⅱ型跨膜蛋白,在T、B 淋巴细胞、单核-巨噬细胞等多种免疫细胞均有表达,RANKL可与破骨前体细胞的细胞膜表面的RANK受体结合,激活其下游的信号分子,诱导破骨细胞,发挥调节破骨细胞分化和成熟的功能。
摘要
背景:
慢性根尖周炎根尖区发生不同程度的骨吸收及炎性肉芽组织,研究表明RANK-RANKL-骨保护素信号通路被认为是调节骨吸收的关键通路。
目的:检测RANKL在小鼠根尖周炎中的表达及作用。
方法:C57BL/6J小鼠分为正常对照组和实验组,实验组将双侧下颌第一磨牙直接开髓,暴露于口腔环境中,建立小鼠根尖周炎模型,分别在建模后1,2,3,4周收集下颌骨组织,苏木精-伊红染色观察根尖周组织的变化,免疫组织化学染色检测各时间点RANKL的表达情况。
结果与结论:①苏木精-伊红染色显示,成功建立了小鼠慢性根尖周炎动物模型。正常对照组小鼠下颌第1磨牙根尖区仅有少数炎性细胞,牙周组织完整;术后1-4周,实验组根尖周组织炎性细胞不断增多,浸润范围逐渐变大,牙槽骨破坏逐渐增多;②免疫组织化学染色显示,实验组各时间点RANKL的表达量较正常对照组明显升高(P < 0.05),术后1,2周RANKL的表达量明显增加(P < 0.05),术后3周表达量持续增加,4周时表达量降低(P < 0.05);③结果表明,实验成功建立小鼠慢性根尖周炎模型,RANKL在小鼠慢性根尖周炎中的表达量较高且具有明显趋势,可能对小鼠慢性根尖周炎的进展及骨破坏起促进作用。

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程
ORCID: 0000-0002-3971-3089(仉红)

关键词: 慢性根尖周炎, RANKL, 骨破坏, 破骨细胞, 免疫组织化学染色, 组织构建

Abstract:

BACKGROUND: Different degrees of bone resorption and granulation tissues appear in the apical region of chronic periapical periodontitis. RANK-RANKL-osteoprotegerin signaling pathway has been shown to be the key pathway for regulating bone resorption.
OBJECTIVE: To detect the expression and role of RANKL in mouse apical periodontitis.
METHODS: C57BL/6J mice were allocated into experimental and control groups. In the experimental group, were used to open the mandibular first molars exposed to the oral environment were open to create the model of periapical periodontitis. The mandibular tissue was collected at 1, 2, 3 and 4 weeks after modeling, and the periapical tissue changes were observed by hematoxylin-eosin staining. The expression level of RANKL at each time point was detected by immunohistochemical staining.
RESULTS AND CONCLUSION: Hematoxylin-eosin staining results showed that the mouse model of chronic periapical periodontitis was successfully established. In the control group, only a few inflammatory cells were found in the apical area of mandibular first molars, and the periodontal tissue was intact. The extent of inflammatory infiltration was gradually increased from 1 week to 4 weeks after modeling, and the alveolar bone destruction gradually increased. The results of immunohistochemistry showed that the expression level of RANKL in the experimental group was significantly higher than that in the control group, the level increased significantly from 1 week to 2 weeks after modeling, continued to increase at 3 weeks, and reduced at 4 weeks (all P < 0.05). To conclude, the model of chronic periapical periodontitis is successfully established in mice. The expression level of RANKL in mouse chronic apical periodontitis is high and shows a clear trend, which may promote the progress of chronic apical periodontitis and bone destruction.

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程

Key words: Tooth, Periapical Periodontitis, RANK Ligand, Oosteoclasts, Tissue Engineering

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