中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (35): 5676-5680.doi: 10.12307/2023.892

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

增强miR-185-5p表达可减轻小鼠实验性牙周炎的炎症反应

李  昊1,2,叶枝茂1,2,罗诒财1,2,李孔梅1,2,麦昱颖1,2,王  琪3   

  1. 1广西医科大学口腔医学院/附属口腔医院口腔修复科,广西壮族自治区南宁市  530021;2广西口腔颌面修复与重建研究重点实验室,广西壮族自治区南宁市  530021;3四川大学华西口腔医学院口腔修复科,四川省成都市  610041
  • 收稿日期:2022-10-19 接受日期:2022-12-13 出版日期:2023-12-18 发布日期:2023-06-05
  • 通讯作者: 李昊,博士,主任医师,广西医科大学口腔医学院/附属口腔医院口腔修复科,广西壮族自治区南宁市 530021;广西口腔颌面修复与重建研究重点实验室,广西壮族自治区南宁市 530021
  • 作者简介:李昊,女,1984年生,湖北省武汉市人,满族,2014年四川大学华西口腔医学院毕业,博士,主任医师,主要从事口腔颌面部骨疾病方面的研究 叶枝茂,男,1997年生,浙江省温州市人,汉族,广西医科大学在读硕士,主要从事口腔颌面部骨疾病方面的研究。
  • 基金资助:
    国家自然科学基金项目(82060195),项目负责人:李昊;广西医疗卫生适宜技术开发与推广应用项目(S2022118),项目负责人:李昊

Enhanced miR-185-5p expression attenuates inflammatory responses in a mouse model of experimental periodontitis

Li Hao1, 2, Ye Zhimao1, 2, Luo Yicai1, 2, Li Kongmei1, 2, Mai Yuying1, 2, Wang Qi3   

  1. 1Department of Prosthodontics, College of Stomatology, Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China; 2Guangxi Key Laboratory of Oral and Maxillofacial Restoration and Reconstruction, Nanning 530021, Guangxi Zhuang Autonomous Region, China; 3Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan Province, China
  • Received:2022-10-19 Accepted:2022-12-13 Online:2023-12-18 Published:2023-06-05
  • Contact: Li Hao, Department of Prosthodontics, College of Stomatology, Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China; Guangxi Key Laboratory of Oral and Maxillofacial Restoration and Reconstruction, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • About author:Li Hao, MD, Chief physician, Department of Prosthodontics, College of Stomatology, Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China; Guangxi Key Laboratory of Oral and Maxillofacial Restoration and Reconstruction, Nanning 530021, Guangxi Zhuang Autonomous Region, China Ye Zhimao, Master candidate, Department of Prosthodontics, College of Stomatology, Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China; Guangxi Key Laboratory of Oral and Maxillofacial Restoration and Reconstruction, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • Supported by:
    the National Natural Science Foundation of China, No. 82060195 (to LH); Guangxi Medical and Health Appropriate Technology Development and Application Project, No. S2022118 (to LH)

摘要:


文题释义:

miR-185-5p:是一种微小RNA(microRNA),位于人染色体 22q11.2,可调节靶基因的转录、转录后及翻译过程。研究表明miR-185-5p在免疫调节、血管生成、细胞迁移等方面起到调节作用,并在多种疾病中表现出抗炎作用,通过调节miR-185-5p的表达治疗炎症性疾病是近年来的研究热点之一。


背景:目前牙周炎的发生发展机制仍不十分明确,治疗靶点有待探讨。近年研究发现,miR-185-5p在多种疾病中表现出抗炎作用,其在牙周炎中的作用尚不清楚。
目的:探讨调节miR-185-5p表达对小鼠实验性牙周炎炎症反应的影响。
方法:C57B/6J小鼠24只随机分为正常对照组、牙周炎对照组、牙周炎miR-NC组、牙周炎miR-mimics组,每组6只。除正常对照组外,其余组均构建实验性牙周炎模型。造模4周后,在牙周炎miR-mimics组小鼠双侧下颌第二磨牙近远中牙龈乳头注射100 μL含0.5 mmol/L miR-185-5p mimics的生理盐水,在牙周炎miR-NC组注射100 μL 含0.5 mmol/L阴性对照miR-NC的生理盐水,在正常对照组、牙周炎对照组注射等量生理盐水。给药8周后处死小鼠,Micro-CT检测左下颌骨,qRT-PCR检测左下颌牙龈miR-185-5p、MZB1、肿瘤坏死因子α、白细胞介素6基因表达,免疫组织化学染色检测小鼠右下颌牙龈MZB1、磷酸化p65 核因子κB、肿瘤坏死因子α、白细胞介素6蛋白表达。

结果与结论:①Micro-CT检测显示,与牙周炎对照组及牙周炎miR-NC组相比,牙周炎miR-mimics组的牙槽骨丧失减少(P < 0.05);②qRT-PCR结果显示,牙周炎miR-mimics组的miR-185-5p表达高于正常对照组、牙周炎对照组及牙周炎miR-NC组(P < 0.05);与牙周炎对照组、牙周炎miR-NC组相比,牙周炎miR-mimics组的MZB1、肿瘤坏死因子α、白细胞介素6的mRNA表达降低(P < 0.05);③免疫组织化学染色结果显示,与牙周炎对照组及牙周炎miR-NC组相比,牙周炎miR-mimics组的MZB1、磷酸化p65核因子κB、肿瘤坏死因子α、白细胞介素6蛋白表达减少(P < 0.05);④提示增强miR-185-5p表达能抑制牙周炎炎症反应,抑制牙槽骨吸收,该作用可能与下调牙龈组织中MZB1、核因子κB通路有关。

https://orcid.org/0000-0002-4633-8256(李昊)

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: 牙周炎, miR-185-5p, 炎症反应, MZB1, 牙槽骨, 核因子κB

Abstract: BACKGROUND: The pathogenesis of periodontitis is still unclear, and its therapeutic target remains to be explored. Recent studies have showed that miR-185-5p has anti-inflammatory effects in many diseases. However, it is unclear whether miR-185-5p can influence the inflammatory response in periodontitis.
OBJECTIVE: To investigate the effect of regulating miR-185-5p expression on inflammatory response in experimental periodontitis in mice.
METHODS: Twenty-four C57B/6J mice were randomly divided into normal control group, periodontitis control group, periodontitis miR-NC group and periodontitis miR-mimics group (n=6 per group). Except for the normal control group, other groups were induced into experimental periodontitis. Four weeks after modeling, in the periodontitis miR-mimics group, 100 μL of normal saline containing 0.5 mmol/L miR-185-5p mimics was injected into the proximal and distal gingival papillae of bilateral mandibular second molars of mice. In the periodontitis miR-NC group, 100 μL of normal saline containing 0.5 mmol/L negative control miR-NC was injected. In the normal control group and the periodontitis control group, the same amount of normal saline was injected. After 8 weeks of administration, all mice were sacrificed. Micro-CT was used to detect the left mandibles, and qRT-PCR was used to detect the gene expression of miR-185-5p, marginal zone B and B-1 cell-specific protein (MZB1), tumor necrosis factor α (TNF-α) and interleukin 6 (IL-6) in the gingiva of left mandibles. Immunohistochemical staining was used to detect the protein expression of MZB1, phospho-p65 NF-κB (pp65), TNF-α and IL-6 in the gingiva of right mandibles. 
RESULTS AND CONCLUSION: Micro-CT examination results showed that compared with the periodontitis control group and periodontitis miR-NC group, alveolar bone loss in the periodontitis miR-mimics group was decreased (P < 0.05). qRT-PCR results showed that the expression of miR-185-5p in the periodontitis miR-mimics group was higher than that in the normal control group, periodontitis control group, and periodontitis miR-NC group (P < 0.05). Compared with the periodontitis control group and periodontitis miR-NC group, the mRNA expression of MZB1, TNF-α, and IL-6 was decreased in the periodontitis miR-mimics group (P < 0.05). Immunohistochemical staining results showed that compared with the periodontitis control group and periodontitis miR-NC group, the protein expression of MZB1, pp65, TNF-α and IL-6 was decreased in the periodontitis miR-mimics group (P < 0.05). Therefore, increasing the expression of miR-185-5p can inhibit the inflammatory response in periodontitis and the resorption of alveolar bone, which may be associated with the suppression of MZB1 and nuclear fctor-κB pathway in the gingival tissue.

Key words: periodontitis, miR-185-5p, inflammatory response, MZB1, alveolar bone, nuclear factor-κB 

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