中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (14): 2179-2183.doi: 10.12307/2022.480

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

程序性细胞坏死通路在根尖周炎小鼠模型发生发展中的变化

刘  杰,王  敏   

  1. 口腔疾病研究国家重点实验室,国家口腔疾病临床研究中心,四川大学华西口腔医院修复科,四川省成都市   610041
  • 收稿日期:2021-01-21 修回日期:2021-01-28 接受日期:2021-03-24 出版日期:2022-05-18 发布日期:2021-12-21
  • 通讯作者: 王敏,博士,教授,四川大学华西口腔医院修复科,四川省成都市 610041
  • 作者简介:刘杰,男,1995年生,四川省宜宾市人,汉族,四川大学华西口腔医学院在读硕士,主要从事颌骨骨代谢相关疾病的研究。
  • 基金资助:
    国家自然科学基金(82001060);四川省区域创新合作项目(2020YFQ0008);四川省科技计划项目(2020YFS0174,2019YFS0359)

Changes in programmed necrosis pathway in the occurrence and development of periapical periodontitis in a mouse model

Liu Jie, Wang Min   

  1. State Key Laboratory of Oral Disease Research, National Oral Disease Clinical Research Center, Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan Province, China
  • Received:2021-01-21 Revised:2021-01-28 Accepted:2021-03-24 Online:2022-05-18 Published:2021-12-21
  • Contact: Wang Min, MD, Professor, State Key Laboratory of Oral Disease Research, National Oral Disease Clinical Research Center, Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan Province, China
  • About author:Liu Jie, Master candidate, State Key Laboratory of Oral Disease Research, National Oral Disease Clinical Research Center, Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 82001060; Sichuan Province Regional Innovation Cooperation Project, No. 2020YFQ0008; the Sichuan Provincial Science and Technology Foundation, Nos. 2020YFS0174 and 2019YFS0359

摘要:

文题释义:
程序性细胞坏死:一种新型的调控性细胞死亡方式,由RIP1、RIP3和MLKL介导。
根尖周炎:是指一种发生在根尖周的细菌感染性疾病,可导致根尖区组织破坏和骨质吸收,其始动因子是感染髓腔中的细菌,细菌及其产物与宿主的免疫炎症反应在该过程中发挥着至关重要的作用。

背景:程序性细胞坏死与诸多炎症疾病相关,但其与口腔疾病的相关研究较少,与根尖周炎相关性的研究尚未见报道。
目的:探究小鼠根尖周炎疾病中程序性细胞坏死通路的变化。
方法:将30只12周龄的雄性balb/c小鼠按随机数表法随机分为对照组和实验组。实验组麻醉下行下颌双侧第1磨牙开髓术,向其髓腔定植浓缩具核梭杆菌液体后用暂封膏封洞,建立根尖周炎小鼠模型;对照组仅行麻醉操作。7 d后取小鼠下颌骨,行Micro-CT分析骨质吸收;qPCR检测RIP3和炎症因子白细胞介素1α、白细胞介素1β和肿瘤坏死因子α mRNA的表达情况;Western-blot和免疫组化分析关键分子RIP3和pMLKL蛋白表达情况。实验经四川大学华西口腔医学院实验动物伦理委员会批准,批准号:WCHSIRB-D-2020-423。
结果与结论:①与对照组相比,实验组根尖周骨吸收较多,主要相关指标根尖周骨体积分数和骨质密度显著降低 (P < 0.01);②与对照组相比,实验组下颌骨炎症因子白细胞介素1α、白细胞介素1β和肿瘤坏死因子α mRNA的表达,及程序性细胞坏死通路中的RIP3和pMLKL蛋白的表达升高(均P < 0.01);③结果表明,根尖周炎的发生发展可能与程序性细胞坏死的激活有关。

https://orcid.org/0000-0002-7469-1516 (刘杰) 

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

关键词: 程序性细胞坏死, 根尖周炎, MLKL, RIP3, 炎症

Abstract: BACKGROUND: Programmed necrosis is related to many inflammatory diseases, but there are few studies on its relationship with oral diseases, and the research on its relationship with apical periodontitis has not been reported.
OBJECTIVE: To explore the changes of programmed necrosis pathway in apical periodontitis in a mouse model.
METHODS: Thirty 12-week-old male balb/c mice were randomly divided into control group and experimental group according to the random number table method. After 1 week of acclimatization, the experimental group underwent anesthesia to open the bilateral mandibular first molars. To establish a mouse model of periapical periodontitis, the pulp cavity was colonized with concentrated Fusobacterium nucleatum fluid, and sealed with temporary sealing cream. The control group only underwent anesthesia. After 7 days, the mouse mandibles were dissected, and bone resorption was analyzed by Micro-CT. qPCR was used to detect the expression of RIP3 and inflammatory factors, interleukin-1α, interleukin-1β and tumor necrosis factor-α mRNA; and western-blot and immunohistochemical analysis were used to analyze the expression of key molecules RIP3 and pMLKL. The study protocol was approved by the Experimental Animal Ethics Committee of West China School of Stomatology, Sichuan University, with the approval No. WCHSIRB-D-2020-423.
RESULTS AND CONCLUSION: Compared with the control group, the experimental group had more periapical bone absorption, and the periapical bone volume fraction and bone density decreased significantly (P < 0.01). Compared with the control group, the experimental group had higher mRNA expression of bone inflammatory factors, including interleukin-1α, interleukin-1β and tumor necrosis factor α, and protein expression of RIP3 and pMLKL in the programmed necrosis pathway. The above results indicate that the occurrence and development of apical periodontitis may be related to the activation of programmed cell necrosis.

Key words: programmed necrosis, apical periodontitis, MLKL, RIP3, inflammation

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