中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (15): 2364-2368.doi: 10.3969/j.issn.2095-4344.1177

• 口腔组织构建 oral tissue construction • 上一篇    下一篇

人牙髓炎及根尖周炎病损组织中自噬相关蛋白微管相关蛋白1轻链3B的表达

马金宝1,王  倩2,董  明3,白  桦2   

  1.  (1大连医科大学附属第一医院口腔科,辽宁省大连市  116011;2大连医科大学口腔医学院,辽宁省大连市  116044;3大连医科大学,辽宁省大连市  116044)
  • 收稿日期:2018-12-13 出版日期:2019-05-28 发布日期:2019-05-28
  • 通讯作者: 白桦,博士,讲师,大连医科大学,辽宁省大连市 116044
  • 作者简介:马金宝,男,1981年生,辽宁省人,汉族,2011年东京医科齿科大学毕业,博士,副主任医师,主要从事口腔临床与基础研究。 并列第一作者:王倩,女,1985年生,辽宁省人,汉族,2012年上海交通大学毕业,硕士,讲师,主要从事口腔临床与基础研究。
  • 基金资助:

    国家自然科学基金(81300869),项目负责人:白桦;辽宁省自然科学基金(20180550008),项目负责人:白桦

Expression of autophagy-associated protein light chain 3B in human pulpitis and periapical periodontitis

Ma Jinbao1, Wang Qian2, Dong Ming3, Bai Hua2   

  1.  (1Department of Stomatology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, Liaoning Province, China; 2College of Stomatology, Dalian Medical University, Dalian 116044, Liaoning Province, China; 3Dalian Medical University, Dalian 116044, Liaoning Province, China)
  • Received:2018-12-13 Online:2019-05-28 Published:2019-05-28
  • Contact: Bai Hua, DDS, PhD, Lecturer, College of Stomatology, Dalian Medical University, Dalian 116044, Liaoning Province, China
  • About author:Ma Jinbao, DDS, PhD, Associate chief physician, Department of Stomatology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, Liaoning Province, China Wang Qian, Master, Lecturer, College of Stomatology, Dalian Medical University, Dalian 116044, Liaoning Province, China Ma Jinbao and Wang Qian contributed equally to this work.
  • Supported by:

    the National Natural Science Foundation of China, No. 81300869 (to BH); the Natural Science Foundation of Liaoning Province, No. 20180550008 (to BH)

摘要:

文章快速阅读:

文题释义:
微管相关蛋白1轻链3(microtubule-associated protein 1 light chain 3,LC3):是哺乳动物细胞中酵母ATG8 (Aut7/Apg8)基因的同源物,定位于自噬体表面并参与其形成。LC3B作为LC3家族蛋白,被普遍认为是自噬的标记物,同时有研究表明LC3B与许多疾病如肿瘤等的发生发展相关。
自噬:是细胞通过溶酶体途径对其胞内内容物(如错误折叠的蛋白、受损细胞器等)进行自我消化、自我降解的过程,这一过程对细胞存活、分化及维持稳态具有重要的意义。
摘要
背景:
自噬在牙髓炎、根尖周炎及其引起的牙槽骨破坏中的作用和明确机制尚未完全阐明。 
目的:研究自噬相关蛋白微管相关蛋白1轻链3(LC3)B在人牙髓炎及根尖周炎中的表达,以初步探讨自噬发挥的作用。
方法:经患者知情同意后选取临床因正畸新鲜拔除的健康第1前磨牙或外科完整拔除无龋坏的健康第3磨牙。使用1 mg /L脂多糖刺激牙髓细胞,作用时间分别为0,6,12,24,48 h,使其引起致炎反应。Western blot法检测正常及脂多糖刺激的人牙髓细胞中微管相关蛋白1轻链3B的表达水平;细胞免疫荧光染色观察微管相关蛋白1轻链3B点状聚集情况;Real-time RT-PCR法检测人慢性根尖周炎病损组织中微管相关蛋白1轻链3B的表达水平。
结果与结论:①脂多糖刺激6,12,24,48 h后的牙髓细胞中微管相关蛋白1轻链3B的表达高于正常牙髓细胞,且Ⅱ型微管相关蛋白1轻链3B的表达随刺激时间的延长而增高,其中24 h达到高峰;②微管相关蛋白1轻链3B点状聚集随脂多糖刺激时间延长而增多;③微管相关蛋白1轻链3B在人慢性根尖周炎病损组织中的表达高于正常根尖周组织;④结果说明,自噬相关蛋白微管相关蛋白1轻链3B在人牙髓炎及根尖周炎中的表达增高,形态学亦显示自噬活动增强,提示自噬作用可能与牙髓炎及根尖周炎的发生发展相关。

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: 0000-0002-5042-4421(马金宝);0000-0002-9960-030X(王倩)

关键词: 自噬, LC3B, 牙髓炎, 根尖周炎, 自噬相关蛋白, Ⅱ型微管相关蛋白, 自噬活动, 慢性根尖周炎

Abstract:

BACKGROUND: Role of autophagy in pulpitis, periapical periodontitis and alveolar bone destruction and the underling mechanisms have not been fully elucidated.
OBJECTIVE: To investigate the expression of autophagy-related protein light chain 3B in human pulpitis and periapical periodontitis, in order to explore the rule of autophagy.
METHODS: The healthy first premolar or surgically removed third premolar was selected from the patients undergoing orthodontics after their consent informs. The dental pulp cells were treated with 1 mg/L lipopolysaccharide for 0, 6, 12, 24 and 48 hours to induce inflammation. The expression of light chain 3B in normal and lipopolysaccharide-stimulated dental pulp cells was detected by western blot assay. The dotted accumulation of light chain 3B was observed by immunofluorescence. The expression level of light chain 3B in specimens of human chronic periapical periodontitis tissues was tested by real-time RT-PCR.
RESULTS AND CONCLUSION: The expression of light chain 3B in dental pulp cells stimulated by lipopolysaccharide for 6, 12, 24 and 48 hours was higher than that in normal dental pulp cells. The expression of light chain 3B increased with time, and peaked at 24 hours. Dotted accumulation of light chain 3B increased with lipopolysaccharide simulation time prolonged. The expression level of light chain 3B in specimens of human chronic periapical periodontitis tissues was higher than that in normal periapical tissues. These results indicate that the expression of light chain 3B is increased in human pulpitis and periapical periodontitis, and morphology also shows an increase of autophagy, suggesting that autophagy may be associated with the occurrence and development of pulpitis and periapical periodontitis.

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: Autophagy, Dental Pulp, Periapical Periodontitis, Tissue Engineering

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