Osteoprotegerin deficiency causes morphological and quantitative damage in epithelial rests of Malassez

Osteoprotegerin deficiency causes morphological and quantitative damage in epithelial rests of Malassez
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骨保护素缺乏导致马拉色上皮残存的形态和数量损伤

DOI:
10.1007/s10735-018-9771-6
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发表时间:
2018-04
影响因子:
3.2
通讯作者:
Zhang Qi
Zhang Qi
中科院分区:
生物学4区
文献类型:
--
作者:
Wang Yunfei;Liu Mengmeng;Deng Shijian;Sui Xin;Fan Linlin;Zhang Qi

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马拉塞斯上皮残留物(ERM)是牙周组织中唯一的牙源性上皮结构,被认为与牙根吸收相关,但详细机制仍不清楚。骨保护素(OPG)是破骨细胞生成的主要抑制剂,在抑制牙根吸收中发挥着关键作用,ERM细胞在体外表达OPG mRNA。因此,在本研究中,我们的目的是阐明体内 ERM 中 OPG 的表达,并探讨 OPG 在 ERM 中的作用,以确定 ERM 是否与 OPG 的根吸收相关。我们建立了OPG敲除(Opg-KO)小鼠,并通过免疫组化染色检测4、6、10、26和52周龄小鼠ERM中OPG的表达。在 4、10 和 26 周龄时对野生型 (WT) 小鼠和 Opg-KO 小鼠的 ERM 进行组织学评估。建立正畸牙根吸收模型,4周后收集上颌骨,并通过组织形态学分析进行ERM分析。在我们的研究中,OPG在ERM中持续表达,OPG缺乏导致ERM破坏,其特征是形态不规则和数量减少。此外,正畸治疗后,OPG的丢失严重损害了ERM,加剧了牙根吸收。总之,我们的结果证明 ERM 在体内表达 OPG 蛋白,并且 OPG 缺乏会导致 ERM 的形态和数量损伤。此外,ERM 可能通过 OPG 与牙根吸收相关,从而有助于解释牙根吸收的机制。
Epithelial rests of Malassez (ERM), the only odontogenic epithelial structures in periodontal tissue, are proposed to correlate with root resorption, but the detailed mechanism remains unclear. Osteoprotegerin (OPG), the main inhibitor of osteoclastogenesis, plays a pivotal role in inhibiting root resorption, and ERM cells express OPG mRNA in vitro. Thus, in this study, we aimed to clarify OPG expression in ERM in vivo and to explore the role of OPG in ERM to determine whether ERM are associated with root resorption via OPG. We establishedOpg-knockout (Opg-KO) mice and detected the OPG expression in ERM by immunohistochemical staining in 4-, 6-, 10-, 26- and 52-week-old mice. The ERM of wild-type (WT) mice andOpg-KO mice were evaluated histologically at 4, 10 and 26 weeks of age. Orthodontic root resorption models were established, maxillae were collected after 4 weeks, and ERM were analysed by histomorphometric analysis. In our study, OPG displayed sustained expression in ERM, and OPG deficiency caused the destruction of ERM, characterized by irregular morphology and reduced numbers. Moreover, after orthodontic treatment, the loss of OPG severely damaged ERM, aggravating root resorption. Together, our results demonstrated that ERM expressed the OPG protein in vivo and that OPG deficiency resulted in morphological and quantitative damage to ERM. Furthermore, ERM may be associated with root resorption via OPG, thus helping to explain the mechanism underlying root resorption.
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发表时间: 2003-11
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