中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (17): 2654-2659.doi: 10.12307/2022.530

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

骨疏康干预Beagle犬正畸牙根吸收过程中的成骨分化及机制

万  哲1,杜  军1,何  静1,胡  杨2   

  1. 1新疆医科大学附属中医医院口腔科,新疆维吾尔自治区乌鲁木齐市   830000;2新疆医科大学第一附属医院口腔医院口腔种植修复科,新疆维吾尔自治区乌鲁木齐市   830011
  • 收稿日期:2021-06-25 修回日期:2021-08-12 接受日期:2021-10-14 出版日期:2022-06-18 发布日期:2021-12-24
  • 通讯作者: 胡杨,副主任医师,新疆医科大学第一附属医院口腔医院口腔种植修复科,新疆维吾尔自治区乌鲁木齐市 830011
  • 作者简介:万哲,男,1975年生,新疆维吾尔自治区乌鲁木齐市人,汉族,副主任医师,主要从事口腔错牙合畸形的矫正研究。
  • 基金资助:
    新疆维吾尔自治区自然科学基金面上项目(2019D01C185),项目负责人:万哲

Effect of Gushukang on osteogenic differentiation in a Beagle dog model during orthodontic root resorption and its mechanism

Wan Zhe1, Du Jun1, He Jing1, Hu Yang2   

  1. 1Department of Stomatology, Affiliated Traditional Chinese Medicine Hospital, Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China; 2Department of Implant and Prosthodontics, the First Teaching Hospital/Stomatological Hospital of Xinjiang Medical University, Urumqi 830011, Xinjiang Uygur Autonomous Region, China
  • Received:2021-06-25 Revised:2021-08-12 Accepted:2021-10-14 Online:2022-06-18 Published:2021-12-24
  • Contact: Hu Yang, Associate chief physician, Department of Implant and Prosthodontics, the First Teaching Hospital/Stomatological Hospital of Xinjiang Medical University, Urumqi 830011, Xinjiang Uygur Autonomous Region, China
  • About author:Wan Zhe, Associate chief physician, Department of Stomatology, Affiliated Traditional Chinese Medicine Hospital, Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • Supported by:
    the Natural Science Foundation of Xinjiang Uygur Autonomous Region (General Project), No. 2019D01C185 (to WZ)

摘要:

文题释义:
RUNX2基因:为成骨细胞标志物核心结合因子或 Runt 相关转录因子2,作为骨细胞的特异转录因子,在成骨细胞的分化、软骨细胞的成熟、骨基质蛋白的产生等过程中都具有显著作用,对骨形成和重建起着重要作用,是一种公认的关键转录因子。
β-连环蛋白基因:是成骨细胞增殖和分化的关键基因,可以增强成骨细胞活性,调控成骨细胞定向分化,其所在的Wnt/β-连环蛋白信号通路在不同发育阶段发挥不同的作用机制,调控成骨细胞的增殖分化和骨形成。

背景:磨牙压低过程中牙根吸收是常见的并发症,具有不可预知性,目前临床上没有行之有效的治疗方法。骨疏康具有促进成骨细胞增殖分化、抑制破骨细胞活性的作用,主要用于预防和治疗骨质疏松与骨缺损,但其在牙根吸收方面的研究较少。
目的:探讨骨疏康对Beagle犬正畸牙根吸收过程中成骨分化的调节作用及可能的作用机制。
方法:将16只雄性Beagle犬随机分为正常对照组(n=4)、蒸馏水组(n=6)与骨疏康组(n=6),正常对照组不进行任何干预,蒸馏水组与骨疏康组建立双侧上颌第一磨牙压低动物模型(正畸矫治手术),造模后分别灌胃给予蒸馏水与骨疏康[2.1 g/(kg·d)]。造模后6,9,12周取第一磨牙组织,采用qRT-PCR检测RUNX2、牙本质涎磷蛋白、骨形成蛋白2、骨钙蛋白的mRNA表达,Western blot检测RUNX2和β-连环蛋白的蛋白表达。
结果与结论:①大体观察可见,随着时间的推移,第一磨牙出现明显压低现象,在第12周效果最为明显;②qRT-PCR检测显示,相同时间点下,骨疏康组骨形成蛋白2、牙本质涎磷蛋白、RUNX2和骨钙蛋白mRNA表达量高于其他两组(P < 0.05),蒸馏水组骨形成蛋白2、RUNX2 mRNA表达量低于正常对照组(P < 0.05);骨疏康组3个时间点的骨形成蛋白2、牙本质涎磷蛋白、RUNX2和骨钙蛋白mRNA表达量比较差异均无显著性意义(P > 0.05);③Western blot检测显示,相同时间点下,骨疏康组β-连环蛋白、RUNX2的蛋白表达量高于其他两组(P < 0.05),蒸馏水组β-连环蛋白、RUNX2的蛋白表达量低于正常对照组(P < 0.05);骨疏康组造模后9,12周的RUNX2蛋白表达量高于造模后6周(P < 0.05),造模后12周的β-连环蛋白表达量高于造模后9周(P < 0.05);④结果表明,骨疏康可能是通过激活骨形成蛋白2与RUNX2/β-连环蛋白通路促进Beagle犬正畸磨牙组织的成骨分化,维持骨基质。

https://orcid.org/0000-0003-0153-2810 (万哲) 

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: 根吸收, 骨疏康, 成骨分化, 动物模型, 磨牙压低, 种植钉, 犬, 正畸矫治

Abstract: BACKGROUND: Root resorption is a common complication in molar intrusion, which is unpredictable. There is currently no effective treatment in clinical practice. Gushukang can promote the proliferation and differentiation of osteoblasts and inhibit the activity of osteoclasts. It is mainly used for the prevention and treatment of osteoporosis and bone defects, but there are few studies on root resorption.
OBJECTIVE: To investigate the effect of Gushukang on osteogenic differentiation in a Beagle dog model of orthodontic root resorption and its possible mechanism.
METHODS: Sixteen male Beagle dogs were randomly divided into a normal control group (n=4), a distilled water group (n=6) and a Gushukang group (n=6). The normal control group did not undergo any intervention. A bilateral maxillary first molar intrusion animal model (orthodontic surgery) was established in the distilled water group and Gushukang group. After the model was made, distilled water and Gushukang [2.1 g/(kg·d)] were given by gavage in the distilled water and Gushukang groups, respectively. At the 6th, 9th, and 12th weeks after modeling, the first molar tissue was taken. Quantitative real-time polymerase chain reaction was used to detect the mRNA expression of runt-related transcription factor 2, dentin sialophosphoprotein, bone morphogenetic protein 2, and osteocalcin. Western blot was used to detect the protein expression of runt-related transcription factor 2 and beta-catenin.
RESULTS AND CONCLUSION: General observation showed that the first molar appeared to be significantly intruded with time, and the effect was most obvious at the 12th week. Quantitative real-time polymerase chain reaction test showed that, at the same time point, the mRNA expression of bone morphogenetic protein 2, dentin sialophosphoprotein, runt-related transcription factor 2 and osteocalcin in the Gushukang group was higher than that in the other two groups (P < 0.05). The mRNA expression of bone morphogenetic protein 2 and runt-related transcription factor 2 in the distilled water group was lower than that in the normal control group (P < 0.05). And there was no significant difference in the mRNA expression of bone morphogenetic protein 2, dentin sialophosphoprotein, runt-related transcription factor 2 and osteocalcin at three observational time points in the Gushukang group (P > 0.05). Western blot analysis showed that, at the same time point, the protein expression of beta-catenin and runt-related transcription factor 2 in the Gushukang group was higher than that in the other two groups (P < 0.05), and the protein expression of beta-catenin and runt-related transcription factor 2 in the distilled water group was lower than that in the normal control group (P < 0.05). The protein expression of runt-related transcription factor 2 in the Gushukang group at 9 and 12 weeks after modeling was higher than that at 6 weeks after modeling (P < 0.05), and the protein expression of beta-catenin at 12 weeks after modeling was higher than that at 9 weeks after modeling (P < 0.05). To conclude, Gushukang may promote osteogenic differentiation in orthodontic molar tissue and maintain the bone matrix in Beagle dogs by activating bone morphogenetic protein 2 and runt-related transcription factor 2/beta-catenin pathway.

Key words: root resorption, Gushukang, osteogenic differentiation, animal model, molar intrusion, implant nail, dog, orthodontic treatment

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