中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (14): 2166-2171.doi: 10.3969/j.issn.2095-4344.3144

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

增强芳香烃受体表达对糖尿病模型大鼠牙槽骨缺损区愈合及炎症反应的影响

罗诒财,李   昊   

  1. 广西医科大学口腔医学院口腔修复科,广西壮族自治区南宁市   530022
  • 收稿日期:2019-12-23 修回日期:2019-12-28 接受日期:2020-02-26 出版日期:2021-05-18 发布日期:2020-12-30
  • 通讯作者: 李昊,博士,副主任医师,广西医科大学口腔医学院口腔修复科,广西壮族自治区南宁市 530022
  • 作者简介:罗诒财,男,1987年生,湖南省祁东市人,汉族,广西医科大学在读硕士,主治医师,主要从事口腔种植修复方面的研究。
  • 基金资助:
    国家自然科学基金(81600833),项目负责人:李昊

Effect of enhanced aryl hydrocarbon receptor expression on inflammatory response and healing of alveolar bone defects in diabetic rats

Luo Yicai, Li Hao   

  1. Department of Prosthodontics, School of Stomatology, Guangxi Medical University, Nanning 530022, Guangxi Zhuang Autonomous Region, China
  • Received:2019-12-23 Revised:2019-12-28 Accepted:2020-02-26 Online:2021-05-18 Published:2020-12-30
  • Contact: Li Hao, MD, Associate chief physician, Department of Prosthodontics, School of Stomatology, Guangxi Medical University, Nanning 530022, Guangxi Zhuang Autonomous Region, China
  • About author:Luo Yicai, Master candidate, Attending physician, Department of Prosthodontics, School of Stomatology, Guangxi Medical University, Nanning 530022, Guangxi Zhuang Autonomous Region, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81600833 (to LH)

摘要:

文题释义:
AhR:Aryl hydrocarbon receptor,即芳香烃受体,一种配体激活的转录因子,参与体内一些重要的生物学过程,如信号转导、细胞分化、细胞凋亡等,对生长发育和生理功能具有调控作用。研究表明,AhR信号在健康和疾病免疫系统中发挥重要作用,其在多种免疫炎症反应中起重要调节作用,通过调控AhR表达来治疗一系列疾病是近年来研究的热点。
糖尿病牙槽骨缺损:糖尿病牙周炎是糖尿病在口腔的并发症,其导致的牙周附着丧失和骨吸收是糖尿病患者失牙的重要原因。糖尿病骨状态易导致牙槽骨缺损难以愈合,为后续口腔治疗如牙种植手术等的实施带来困难,因此治疗糖尿病牙槽骨缺损愈合障碍是当前口腔医学领域的难点及热点。

背景:高血糖状态下牙槽骨缺损区的高炎症反应状态,是导致骨愈合迟缓的重要原因。研究表明,增强芳香烃受体(AhR)表达能够抑制炎症反应,有利于组织损伤愈合。
目的:研究增强芳香烃受体表达对糖尿病大鼠牙槽骨缺损区炎症反应及骨缺损愈合的影响及机制。
方法:SD大鼠40只,随机取血糖正常大鼠10只作为正常对照组;其余大鼠构建糖尿病模型后,随机分为空白对照组、阴性对照组、芳香烃受体增强组,每组10只;所有糖尿病模型大鼠构建双侧上颌牙槽骨缺损模型。芳香烃受体增强组骨缺损处注射含有过表达芳香烃受体慢病毒载体的AteloGene胶体;阴性对照组骨缺损处注射含有慢病毒空白载体的AteloGene胶体;空白对照组及正常对照组不做注射。28 d取大鼠双侧上颌骨组织,苏木精-伊红染色检测局部骨缺损愈合状况;qRT-PCR检测芳香烃受体与Notch 信号通路相关基因的变化、炎症因子及碱性磷酸酶基因表达。动物实验获得广西医科大学动物实验伦理委员会批准。
结果与结论:①苏木精-伊红染色显示,芳香烃受体增强组的骨组织再生Lane-Sandhu 评分高于空白对照组和阴性对照组(P < 0.05),炎性细胞浸润水平低于空白对照组和阴性对照组(P < 0.05);②qRT-PCR结果显示,芳香烃受体增强组中肿瘤坏死因子α、白细胞介素6、Notch1、Jagged1及Jagged2表达低于空白对照组和阴性对照组(P < 0.05),白细胞介素10和碱性磷酸酶表达高于空白对照组和阴性对照组(P < 0.05);③结果表明,在高糖状态下,增强芳香烃受体表达可减轻糖尿病大鼠牙槽骨缺损区炎症反应,促进骨缺损愈合,这些作用可能与Notch信号通路激活受到抑制有关。

关键词: 糖尿病, 牙槽骨缺损, 炎症反应, 受体, 骨缺损, 信号通路, 炎性因子, 碱性磷酸酶, 大鼠

Abstract: BACKGROUND: Under high glucose conditions, inflammatory responses in the defect site of alveolar bone are intensified, resulting in delayed bone healing. Previous studies have shown that enhanced aryl hydrocarbon receptor (AhR) expression can inhibit inflammatory responses and promote tissue healing.
OBJECTIVE: To study the effect and mechanism of enhanced AhR expression on inflammatory response and healing of alveolar bone defects in diabetic rats.
METHODS: Ten of 40 Sprague-Dawley rats were randomly selected as normal controls. Diabetic models were established in the other 30 rats, and randomly divided into AhR enhancement, negative control, and blank control groups, with 10 rats in each group. Bone defects were made by surgery in both sides of maxillae of each diabetic rat. After surgery, AteloGene gel with AhR lentiviruses was injected into the defect sites of rats in the AhR enhancement group. AteloGene gel with control lentiviruses was injected into the defect sites of rats in the negative control group. Rats in blank control group and normal control group received no injection. Twenty-eight days after defects were made, all rats were sacrificed, and left maxillary bone tissues were collected to detect bone healing using hematoxylin-eosin staining. Tissues from right maxillary bone defect sites were detached, and qRT-PCR was used to detect the gene expression of AhR and Notch signaling pathway members and inflammatory factors and alkaline phosphatase. Animal experiment was approved by the Animal Experimental Ethics Committee of Guangxi Medical University. 
RESULTS AND CONCLUSION: Hematoxylin-eosin staining showed that the Lane-Sandhu scores of bone tissue regeneration in the AhR enhancement group were higher than those of negative control and blank control groups (P < 0.05); and the levels of inflammatory cell infiltration were lower than those of negative control and blank control groups (P < 0.05). qRT-PCR results showed that the levels of tumor necrosis factor α, interleukin-6, Notch1, Jagged1 levels, and Jagged2 in the AhR enhancement group were lower than those in the negative control and blank control groups (P < 0.05), and the levels of interleukin-10 and alkaline phosphatase were higher than those in the negative control and blank control groups (P < 0.05). These findings suggest that under high glucose conditions, enhanced AhR expression could reduce inflammatory response in alveolar bone defect sites of diabetic rats and promote the healing of bone defects, which may be associated with the inhibition of Notch signaling activation.


Key words: diabetes mellitus, alveolar bone defect, inflammatory response, receptor, bone defect, signaling pathway, inflammatory response, alkaline phosphatase, rat

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