J Periodontal Res:钙卫蛋白对牙龈成纤维细胞的促炎作用及其机制 钙卫蛋白(S100A8 / A9)是S100A8和S100A9的异源二聚体,与多

2017-12-05 MedSci MedSci原创

钙卫蛋白(S100A8 / A9)是S100A8和S100A9的异源二聚体,与多种炎性疾病有关,包括克罗恩氏病,类风湿性关节炎和牙周炎。牙周炎患者龈沟液钙卫蛋白水平升高;然而,钙卫蛋白对人牙龈成纤维细胞(HGF)的作用仍然未知。本研究旨在探讨钙卫蛋白对HGFs的促炎作用及钙卫蛋白涉及的功能受体和信号通路。

钙卫蛋白(S100A8 / A9)是S100A8和S100A9的异源二聚体,与多种炎性疾病有关,包括克罗恩氏病,类风湿性关节炎和牙周炎。牙周炎患者龈沟液钙卫蛋白水平升高;然而,钙卫蛋白对人牙龈成纤维细胞(HGF)的作用仍然未知。本研究旨在探讨钙卫蛋白对HGFs的促炎作用及钙卫蛋白涉及的功能受体和信号通路。

材料与方法:用等摩尔浓度的S100A8和/或S100A9刺激HGF,用实时定量聚合酶链式反应和酶联免疫吸附试验检测白细胞介素(IL)-6和IL-8的表达水平。通过将HGF与Toll样受体(TLR)4抑制剂或靶向晚期糖基化终产物受体(RAGE)的抗体预温育来鉴定钙卫蛋白受体。还通过用ROS抑制剂或特异性途径抑制剂处理HGF来研究活性氧(ROS)和信号传导途径的参与。

结果:S100A9和S100A8 / A9可以显着上调IL-6和IL-8的表达,其在用TLR4抑制剂TAK242处理时被抑制。用RAGE阻断抗体预处理不影响细胞因子表达。此外,S100A9通过不同的信号传导途径促进HGFs产生IL-6和IL-8。通过NF-κB,c-Jun氨基末端激酶(JNK)1/2和p38丝裂原活化蛋白激酶(MAPK)途径上调IL-6的表达,IL-8的表达通过NF-κB,p38 ,JNK1 / 2和细胞外调节激酶1/2 MAPK通路。两种细胞因子的释放都依赖于ROS的产生。

结论:我们的研究结果表明,钙卫蛋白通过S100A9亚基和TLR4介导的NF-κB和MAPK信号传导途径对HGFs产生促炎作用。

原始出处:

H. Gao, et al. Proinflammatory effects and mechanisms of calprotectin on human gingival fibroblasts. Journal of Periodontal Research. 2017 December. doi: 10.1111/jre.12465

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    2018-04-01 heli0118
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    2018-06-05 feather89
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    2018-09-27 hxj0117
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    2017-12-06 chunjianf

    学习了.谢谢分享

    0

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