J Periodontal Res: Toll样受体2在种植体周围炎与牙周炎牙槽骨吸收中的作用

2018-04-03 MedSci MedSci原创

种植体周围炎和牙周炎在免疫特性方面是不同的实体,即使它们在临床和影像学中具有相似的特征。 Toll样受体2(TLR-2)是先天免疫系统中关键病原体的 识别受体之一,在牙周炎的发展中起着重要作用。然而,TLR-2在种植体周围炎中的作用尚不清楚。本研究的目的是研究TLR-2在结扎诱导的种植体周围炎的小鼠模型中的炎症和牙槽骨吸收中的作用,并将其与结扎诱导的牙周炎相比较。

种植体周围炎和牙周炎在免疫特性方面是不同的实体,即使它们在临床和影像学中具有相似的特征。 Toll样受体2(TLR-2)是先天免疫系统中关键病原体的 识别受体之一,在牙周炎的发展中起着重要作用。然而,TLR-2在种植体周围炎中的作用尚不清楚。本研究的目的是研究TLR-2在结扎诱导的种植体周围炎的小鼠模型中的炎症和牙槽骨吸收中的作用,并将其与结扎诱导的牙周炎相比较。

在拔牙后6周,将光滑表面钛植入物置于野生型(WT)和Tlr2敲除(Tlr2-KO)小鼠的左上颌磨牙的牙槽骨中。植入种植体后4周,用丝线结扎在左侧种植体固定物和右侧上颌第二磨牙以诱发种植体周围炎和牙周炎。结扎两周后,通过显微计算机断层扫描(micro-CT)分析植入物和上颌第二磨牙周围的骨吸收水平,分别使用组织学和TRAP染色在同一时间点评估种植体和上颌第二磨牙周围的炎症。使用实时定量PCR(RT-qPCR)评估 促炎细胞因子(白细胞介素-1β[Il1β],肿瘤坏死因子-α[Tnfα]),抗炎细胞因子(白细胞介素-10 [Il10])和破骨细胞生成相关细胞因子(Rank1,骨保护素[Opg])的mRNA在牙龈组织中的表达。

结果:Tlr2-KO小鼠种植体骨结合的成功率(85.71%)显着高于WT小鼠(53.66%)(P = 0.0125)。 Micro-CT显示Tlr2-KO小鼠与种植体周围炎WT小鼠(P = .0094)相比,骨显着减少。与对照相比,WT小鼠的种植体周围炎组织中Il1β(P = 0.0055),Tnfα(P = 0.01)和Il10(P = 0.0019)的mRNA水平显着升高,但Tlr2-KO小鼠没有升高。然而,在WT(P = .0488)和Tlr2-KO(P = .0314)小鼠中,种植体周围组织中的Rank1 / Opg的牙龈mRNA比率显着上调。与对照组相比,Tlr2-KO小鼠除了Il10水平升高(P = .0114),Rankl / Opg比率没有升高(P = 0.9755)之外,结扎诱导的牙周炎表现出类似的骨吸收模型和炎性细胞因子情况。组织学研究结果显示WT(P <0.01)和Tlr2-KO小鼠(P <.05)中结扎诱导的种植体周围炎中TRAP阳性细胞和浸润炎性细胞数量增加(P <.05),并且两种类型的细胞在WT小鼠中显着高于Tlr2-KO小鼠(P <0.01)。

结论:这项研究表明,TLR-2介导种植体周围炎和牙周炎的骨质吸收。然而,这两种疾病的发病机制可能存在不同的分子特征。

原始出处:

X. Yu, et al. Role of toll‐like receptor 2 in inflammation and alveolar bone loss in experimental peri‐implantitis versus periodontitis. Journal of Periodontal Research. 2018 February. doi:10.1111/jre.12492

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    2018-06-25 mei540
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    2018-12-31 huangdf
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    2018-12-26 feather89
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    2018-04-05 徐岩