中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (28): 4494-4501.doi: 10.12307/2023.518

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

唑来膦酸促进去势大鼠牙槽骨的成骨作用

宋  娜,刘官娟,程余婷,熊  玥,罗珊珊,洪  伟,廖  健   

  1. 贵州医科大学口腔医学院/附属口腔医院,贵州医科大学分子生物学重点实验室,贵州省贵阳市  550004
  • 收稿日期:2022-07-08 接受日期:2022-08-24 出版日期:2023-10-08 发布日期:2023-01-29
  • 通讯作者: 廖健,博士,教授,主任医师,硕士,博士生导师,贵州医科大学口腔医学院/附属口腔医院,贵州医科大学分子生物学重点实验室,贵州省贵阳市 550004
  • 作者简介:宋娜,女,1995年生,贵州省贵阳市人,汉族,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(82060207,81660179),项目负责人:廖健;贵州省卫生健康委科学技术基金(gzwkj2022-165),项目负责人:廖健

Zoledronic acid promotes alveolar bone formation in ovariectomized rats

Song Na, Liu Guanjuan, Cheng Yuting, Xiong Yue, Luo Shanshan, Hong Wei, Liao Jian   

  1. School of Stomatology/Affiliated Stomatological Hospital of Guizhou Medical University, Key Laboratory of Molecular Biology, Guiyang 550004, Guizhou Province, China 
  • Received:2022-07-08 Accepted:2022-08-24 Online:2023-10-08 Published:2023-01-29
  • Contact: Liao Jian, MD, Professor, Chief physician, Master’s supervisor, Doctoral supervisor, School of Stomatology/Affiliated Stomatological Hospital of Guizhou Medical University, Key Laboratory of Molecular Biology, Guiyang 550004, Guizhou Province, China
  • About author:Song Na, Master candidate, School of Stomatology/Affiliated Stomatological Hospital of Guizhou Medical University, Key Laboratory of Molecular Biology, Guiyang 550004, Guizhou Province, China
  • Supported by:
    the National Natural Science Foundation of China, Nos. 82060207 and 81660179 (both to LJ); Guizhou Provincial Health Commission Science and Technology Foundation, No. gzwkj2022-165 (to LJ)

摘要:

文题释义:

NLPR3/Caspase-1/IL-1β:NLRP3是NOD样受体家族成员之一,能与凋亡相关斑点样蛋白和Caspase-1前体组成 NLRP3 炎症小体复合物,促使Caspase-1活化,活化的Caspase-1将细胞内所产生的IL-1β前体加工成成熟的的IL-1β,并在炎症中发挥重要作用,造成骨量丢失。
成骨细胞:是骨形成的主要细胞,其功能是参与骨基质的合成、分泌和矿化,在牙槽骨改建过程中发挥重要作用。

背景:唑来膦酸主要作用于破骨细胞的形成,也能抑制成骨细胞的凋亡及成骨细胞增殖和分化,但唑来膦酸对去势大鼠牙槽骨促成骨作用及机制尚存在争议。
目的:基于牙槽骨 NLPR3/Caspase-1/IL-1β信号通路,探讨唑来膦酸对去势大鼠牙槽骨促成骨作用的机制。
方法:选取36只SD雌性大鼠,随机分为对照组、模型组、唑来膦酸组,每组12只,后两组采用双侧卵巢切除术建立骨质疏松大鼠模型,唑来膦酸组于造模术后12周一次性皮下注射20 μg/kg唑来膦酸,对照组及模型组注射同等剂量生理盐水。药物干预4周后麻醉大鼠,收集腹主动脉血清及取牙槽骨进行相关检测。ELISA检测大鼠血清中碱性磷酸酶、骨钙素及白细胞介素1β的表达水平;苏木精-伊红染色观察各组大鼠牙槽骨病理结构变化;TUNEL染色检测各组大鼠牙槽骨成骨细胞凋亡情况;钙黄绿素荧光标记检测牙槽骨骨形成情况;Western blot检测各组大鼠牙槽骨骨组织中NLPR3、Caspase-1、白细胞介素1β蛋白的表达水平及Runt相关转录因子2、碱性磷酸酶和骨钙素蛋白的表达情况。

结果与结论:①与模型组相比,唑来膦酸组大鼠血清中碱性磷酸酶及白细胞介素1β表达水平显著降低 (P < 0.01),骨钙素表达水平显著升高(P < 0.05);②与模型组相比,唑来膦酸组牙槽骨病理结构有所改善;③唑来膦酸组TUNEL 阳性细胞数明显低于模型组(P < 0.001);④唑来膦酸组骨小梁矿化沉积率和新骨形成率较模型组高(P < 0.05);⑤Western blot结果显示,与对照组相比,模型组NLPR3、Caspase-1、白细胞介素1β蛋白表达均升高(P < 0.05),Runt 相关转录因子 2、碱性磷酸酶、骨钙素蛋白表达均降低(P < 0.05);而唑来膦酸组NLPR3、Caspase-1、白细胞介素1β蛋白表达水平均降低(P < 0.05),Runt 相关转录因子 2、碱性磷酸酶、骨钙素蛋白表达水平均升高(P < 0.05);⑥提示唑来膦酸可以影响血清中成骨相关因子及炎性因子的表达来改善骨代谢及炎性反应状态,增强成骨细胞分化功能,延缓骨质疏松形成;唑来膦酸可改善牙槽骨骨组织结构、减少牙槽骨成骨细胞凋亡及NLPR3、Caspase-1、白细胞介素1β蛋白表达,增加牙槽骨骨小梁矿化沉积率、新骨形成率及Runt相关转录因子2、碱性磷酸酶、骨钙素蛋白表达,其可能与抑制NLRP3/Casapse-1/IL-1β信号通路有关。

https://orcid.org/0000-0002-1486-8834(宋娜)

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, 去势大鼠, 牙槽骨, NLRP3炎性小体, 成骨细胞

Abstract: BACKGROUND: Zoledronic acid mainly acts on the formation of osteoclasts and also inhibits osteoblast apoptosis, proliferation, and differentiation. However, the effect and mechanism of zoledronic acid on alveolar bone formation in ovariectomized rats are still controversial.
OBJECTIVE: To explore the osteogenic effect of zoledronic acid on alveolar bone of ovariectomized rats via alveolar nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3)/cysteinyl-aspartate protease-1 (Caspase-1)/interleukin-1β pathway.
METHODS: Totally 36 female Sprague-Dawley rats were randomly divided into control group, model group, and zoledronic acid group, with 12 rats in each group. Bilateral oophorectomy was used to establish an animal model of osteoporosis in the latter two groups. The zoledronic acid group was subcutaneously given 20 μg/kg zoledronic acid at 12 weeks after modeling, while the control and model groups were injected with the same dose of normal saline. All animals were anesthetized after 4-week drug intervention to collect serum samples from the abdominal aorta and alveolar bone samples. Serum alkaline phosphatase, osteocalcin and interleukin-1β levels were detected by ELISA. Hematoxylin-eosin staining was used to observe the pathological changes of rat alveolar bone. TUNEL staining was used to detect the apoptosis of osteoblasts in rat alveolar bone. The formation of alveolar bone was detected by calcein fluorescent labeling. Western blot assay was used to detect the levels of NLPR3, Caspase-1 and interleukin-1β in alveolar bone tissue as well the protein expression of Runt related transcription factor 2, alkaline phosphatase, and osteocalcin.
RESULTS AND CONCLUSION: Compared with the model group, the expression level of alkaline phosphatase in rat serum decreased in the zoledronic acid group (P < 0.01), while the expression level of osteocalcin increased significantly (P < 0.05). Compared with the model group, the pathological structure of alveolar bone in the zoledronic acid group was improved. The number of TUNEL positive cells in the zoledronic acid group was significantly lower than that in the model group (P < 0.001). The mineralization deposition rate and new bone formation rate of trabecular bone in the zoledronic acid group were higher than those in the model group (P < 0.05). (5) Western blot results showed that compared with the control group, NLRP3, Caspase-1, interleukin-1β proteins was highly expressed in the model group (P < 0.05), while the expressions of Runt related transcription factor 2, alkaline phosphatase, and osteocalcin proteins were decreased (P < 0.05). However, treatment with zoledronic acid decreased the protein expression of NLRP3, Caspase-1, and interleukin-1β (P < 0.05), but increased the protein expression of Runt related transcription factor 2, alkaline phosphatase, and osteocalcin (P < 0.05). The above results show that zoledronic acid can affect the expression of osteogenic related factors and inflammatory factors in serum to improve bone metabolism and inflammatory response, enhance the differentiation function of osteoblasts, and delay the formation of osteoporosis. Zoledronic acid can improve alveolar bone structure, reduce alveolar bone osteoblast apoptosis and the protein expression of NLRP3, Caspase-1, and interleukin-1β, increase the mineralization deposition rate and new bone formation rate of alveolar bone trabecula and the protein expression of Runt related transcription factor 2, alkaline phosphatase, and osteocalcin, which may be related to the inhibition of NLRP3/Caspase-1/interleukin-1β signaling pathway.

Key words: zoledronic acid, ovariectomized rat, alveolar bone, NLRP3 , inflammasome, osteoblast

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