中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (17): 2660-2666.doi: 10.12307/2022.531

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

唑来膦酸干预去势大鼠牙槽骨骨代谢及核苷酸结合寡聚化结构域样受体蛋白3炎症小体表达的变化

霍  花,刘官娟,宋  娜,周  倩,程余婷,罗珊珊,廖  健   

  1. 贵州医科大学口腔医学院/附属口腔医院,贵州省贵阳市   550004
  • 收稿日期:2021-03-26 修回日期:2021-04-01 接受日期:2021-05-07 出版日期:2022-06-18 发布日期:2021-12-24
  • 通讯作者: 廖健,博士,教授,主任医师,贵州医科大学口腔医学院/附属口腔医院,贵州省贵阳市 550004
  • 作者简介:霍花,女,1992年生,贵州省遵义市人,苗族,贵州医科大学在读硕士,主要从事口腔修复与种植学研究。
  • 基金资助:
    国家自然科学基金(82060207),项目负责人:廖健

Effects of zoledronic acid on alveolar bone metabolism and nucleotide-binding oligomerization domain-like receptor protein 3 inflammasome in the alveolar bone of ovariectomized osteoporosis rats

Huo Hua, Liu Guanjuan, Song Na, Zhou Qian, Cheng Yuting, Luo Shanshan, Liao Jian   

  1. Stomatological Hospital of Guizhou Medical University, Guiyang 550004, Guizhou Province, China
  • Received:2021-03-26 Revised:2021-04-01 Accepted:2021-05-07 Online:2022-06-18 Published:2021-12-24
  • Contact: Liao Jian, MD, Professor, Chief physician, Stomatological Hospital of Guizhou Medical University, Guiyang 550004, Guizhou Province, China
  • About author:Huo Hua, Master candidate, Stomatological Hospital of Guizhou Medical University, Guiyang 550004, Guizhou Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 82060207 (to LJ)

摘要:

文题释义:
核苷酸结合寡聚化结构域样受体蛋白3(NOD-like receptor family,pyrin domain-containing protein 3,NLRP3)炎症小体:由受体蛋白NLRP3、衍接蛋白(凋亡相关斑点样蛋白)和效应蛋白(半胱天冬氨酸蛋白酶1前体)三部分组成。受体蛋白是炎症小体的核心,NLRP3炎症小体信号通路的激活包括两个步骤:首先,病原体识别受体识别与病原体相关的分子模式,或者细胞因子受体识别与危险相关的分子模式,激活核因子κB,活化的核因子κB能诱导NLRP3和无活性半胱天冬氨酸蛋白酶1前体转为有活性的半胱天冬氨酸蛋白酶1而作用于白细胞介素1β前体和白细胞介素18前体,促进其成熟和活化,引发一系列炎症反应。

背景:唑来膦酸为经典的双膦酸盐类骨吸收抑制剂,但其对下颌牙槽骨骨代谢的影响及机制尚存在争议 。
目的:观察唑来膦酸对去卵巢骨质疏松大鼠牙槽骨吸收及核苷酸结合寡聚化结构域样受体蛋白3炎症小体的影响。
方法:将36只雌性SD大鼠随机分3组,即假手术组、骨质疏松组(行双侧卵巢切除术),唑来膦酸组(双侧卵巢切除,之后给予唑来膦酸),每组12只。术后12周唑来膦酸组皮下注射20 μg/kg唑来膦酸,假手术组和骨质疏松组给予相同剂量的生理盐水。于给药后4周麻醉动物取出下颌牙槽骨进行检测,通过Micro-CT观察牙槽骨骨质骨量及骨吸收情况;苏木精-伊红染色观察牙槽骨病理变化;抗酒石酸酸性磷酸酶染色鉴定牙槽骨破骨细胞数量;免疫组织化学技术检测牙槽骨内核苷酸结合寡聚化结构域样受体蛋白3蛋白的表达;Western blot检测牙槽骨内核苷酸结合寡聚化结构域样受体蛋白3、半胱天冬氨酸蛋白酶1、白细胞介素1β蛋白的表达水平。
结果与结论:①与假手术组相比,骨质疏松组骨小梁结构出现断裂,有大量骨吸收陷窝,牙槽骨表面不平整;同时牙槽骨骨体积分数、骨小梁厚度、骨密度降低,骨小梁分离度增加,牙槽骨破骨细胞数目明显增多(P < 0.05);与骨质疏松组相比,唑来膦酸组牙槽骨骨微结构改善,上述病理症状明显减轻;②免疫组织化学染色显示,骨质疏松组牙槽骨组织中核苷酸结合寡聚化结构域样受体蛋白3蛋白表达水平高于假手术组(P < 0.05),而唑来膦酸组表达水平低于骨质疏松组(P < 0.05);③Western blot结果显示,与假手术组相比,骨质疏松组核苷酸结合寡聚化结构域样受体蛋白3、半胱天冬氨酸蛋白酶1、白细胞介素1β蛋白均高表达;与骨质疏松组相比,唑来膦酸组其蛋白表达水平降低(P < 0.05);④以上结果说明,唑来膦酸能有效抑制骨质疏松大鼠体内牙槽骨组织中核苷酸结合寡聚化结构域样受体蛋白3、半胱天冬氨酸蛋白酶1、白细胞介素1β蛋白的表达,并减少下颌牙槽骨破骨细胞数量,抑制牙槽骨吸收。

https://orcid.org/0000-0003-1960-0148 (霍花) 

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: 唑来膦酸, 去卵巢大鼠, 牙槽骨, 骨质疏松症, 骨代谢, 破骨细胞, 核苷酸结合寡聚化结构域样受体蛋白3炎症小体

Abstract: BACKGROUND: Zoledronic acid is a classical bisphosphate bone resorption inhibitor; however, its effect and mechanism on the mandibular alveolar bone metabolism are not clarified.
OBJECTIVE: To study the effects of zoledronic acid on the expression of bone resorption and nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3) inflammasome in the mandibular alveolar bone of ovariectomized osteoporosis rats.
METHODS: Thirty-six female Sprague-Dawley rats were randomly divided into three groups (n=12 per group): sham group, osteoporosis group (bilateral ovariectomy), and zoledronic acid group (bilateral ovariectomy, followed by administration of zoledronic acid). Twelve weeks after ovariectomy, the rats in the zoledronic acid group were given subcutaneous injection of 20 μg/kg zoledronic acid, and the corresponding doses of saline were injected subcutaneously in the sham and osteoporosis groups. The rat’s mandibular alveolar bone was separated and removed at 4 weeks after administration. Alveolar bone mass band alveolar bone absorption were observed by Micro-CT, the pathological changes of the alveolar bone were observed using hematoxylin-eosin staining, the number of osteoclasts in alveolar bone was observed by tartrate resistant acid phosphatase staining, the expression of NLRP3 was determined by immunohistochemical technique, and the protein levels of NLRP3, Caspase-1, and interleukin-1β in the alveolar bone were detected using western blot.
RESULTS AND CONCLUSION: Compared with the sham group, the bone trabecular structure was broken in the osteoporosis group, with the emergence of a large number of bone resorption lacunae and uneven surface of the alveolar bone; meanwhile, percent bone volume, trabecular thickness, bone mineral density in alveolar bone were lower, trabecular separation were increased, and the number of osteoclast was significantly increased in the osteoporosis group (P < 0.05). Compared with the osteoporosis group, alveolar bone microstructure in the zoledronic acid group was improved, and the above pathological symptoms were alleviated obviously. Immunohistochemistry staining results showed that the expression level of NLRP3 protein was significantly higher in the osteoporosis group than the sham group (P < 0.05), and the expression of NLRP3 was significantly lower in the zoledronic acid group than the osteoporosis group (P < 0.05). Western blot results indicated that the expression levels of NLRP3, Caspase-1 and interleukin-1β proteins was higher in the osteoporosis group than the sham group, while the protein levels in the zoledronic acid were lower than those in the osteoporosis group (P < 0.05). To conclude, zoledronic acid can effectively inhibit the expression of NLRP3, Caspase-1 and inteleukin-1β in the alveolar bone of osteoporotic rats, and inhibit mandibular alveolar bone resorption by reducing the number of osteoclasts.

Key words: zoledronic acid, ovariectomized rat, alveolar bone, osteoporosis, bone metabolism, osteoclast, nucleotide-binding oligomerization domain-like receptor protein 3 inflammasome

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