J Periodontol:儿茶素通过调控TLR2/4和炎症小体信号通路来改善牙龈卟啉单胞菌诱导的炎症反应

2020-05-31 网络 网络

牙龈卟啉单胞菌(P.gingivalis)是慢性牙周炎的主要致病菌,可引起牙槽骨吸收,牙齿脱落。白细胞介素-1β(IL-1β)是一种促炎细胞因子,与牙周炎的发病机制密切相关。

牙龈卟啉单胞菌(P.gingivalis)是慢性牙周炎的主要致病菌,可引起牙槽骨吸收,牙齿脱落。白细胞介素-1β(IL-1β)是一种促炎细胞因子,与牙周炎的发病机制密切相关。儿茶素是绿茶中主要的多酚类化合物之一,在机体健康的维持中具有一定的作用。本研究探讨了儿茶素在THP-1源性巨噬细胞感染P.gingivalis的小鼠模型中的抗炎作用,以及对P.gingivalis诱导的牙周炎的影响。

本研究采用ELISA和Western印迹分析法分别测定了THP-1细胞中的细胞因子水平和相关蛋白表达。通过共聚焦激光扫描显微镜测量了含有caspase招募域(caspase recruitment domain,ASC)的细胞凋亡相关斑点样蛋白的形成。显微计算机断层扫描确定P. gingivalis口腔感染诱导的牙槽骨吸收水平。

结果发现,儿茶素通过下调NF-κB、p38丝裂原激活蛋白激酶和Toll样受体信号通路,抑制了IL-1β的表达,从而降低IL-1β的水平。此外,儿茶素抑制了P.gingivalis诱导的炎症小体的激活,但对P.gingivalis没有影响。在P. gingivalis诱导的牙周炎小鼠模型中,儿茶素降低了牙槽骨吸收水平。

儿茶素通过降低IL-1β的分泌水平进而发挥抗炎特性,提示它有可能在预防和治疗牙周炎方面起效。

原文出处:

Hyun Ah Lee,Catechin ameliorates Porphyromonas gingivalis-induced inflammation via the regulation of TLR2/4 and inflammasome signaling, journal of periodontology, 2020 May, doi:10.1002/JPER.18-0004

 

 

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    2020-07-18 feather89
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    2021-03-31 lilianxiang
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    2021-03-12 linagood
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    2020-06-02 hbwxf
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