钙结合蛋白S100A4抑制剂Niclosamide调节支气管上皮细胞炎症反应  

Calcium binding protein S 100 A 4 inhibitor Niclosamide regulates inflammatory response of bronchial epithelial cells

作　　者：陈科 莫诗卉 晏世荣 李静 吴通前 余芳 CHEN Ke;MO Shihui;YAN Shirong;LI Jing;WU Tongqian;YU Fang(School of Clinical Laboratory Science of Guizhou Medical University,Guiyang 550004,China)

机构地区：[1]贵州医科大学医学检验学院,贵阳550004

出　　处：《中国免疫学杂志》2024年第11期2262-2266,2272,共6页Chinese Journal of Immunology

基　　金：国家自然科学基金(82260324,81760294);贵州省科技厅项目(黔科合基础-ZK[2023]一般394,黔科合基础-ZK[2023]一般398)。

摘　　要：目的:研究钙结合蛋白S100A4抑制剂Niclosamide对支气管上皮细胞炎症反应的潜在调控机制。方法:体外培养人支气管上皮细胞BEAS-2B,给予LPS刺激或Niclosamide预处理,RT-qPCR、Western blot检测相关细胞因子和信号分子表达,荧光探针检测细胞内ROS水平。结果:LPS刺激和Niclosamide预处理导致细胞ROS水平较对照组升高(P<0.05)。与对照组相比,LPS刺激导致支气管上皮细胞S100A4 mRNA和蛋白表达升高(P<0.05),相关信号通路分子TLR4/STAT3、MAPK1/3/SIRT1、NF-κB/IKKβ/p65 mRNA表达升高(P<0.05),炎症因子IL-1β和IL-6、紧密连接蛋白Occludin和ZO-1 mRNA表达升高(P<0.05)。S100A4抑制剂Niclosamide预处理后,以上基因表达较LPS组呈不同程度下降(P<0.05),但TLR4/MAPK1、NF-κB/IKKβ/p65无明显变化(P>0.05)。Western blot结果显示:LPS组S100A4、STAT3、MAPK3/SIRT1、IL-1β和TNF-α蛋白表达较对照组明显升高(P<0.05),而Occludin表达较对照组降低(P<0.05)。Niclosamide预处理后S100A4、STAT3、MAPK3/SIRT1、IL-1β和TNF-α表达较LPS组降低(P<0.05),而Occludin表达较LPS组升高(P<0.05)。结论:钙结合蛋白S100A4抑制剂Niclosamide可抑制支气管上皮细胞S100A4表达并抑制其炎症反应,可能与STAT3、MAPK3/SIRT1信号相关。Objective:To investigate potential mechanisms of Niclosamide,a calcium-binding protein S100A4 inhibitor,in regulating inflammatory response of bronchial epithelial cells.Methods:Human bronchial epithelial cells BEAS-2B were cultured in vitro and stimulated by LPS or Niclosamide-pretreatment.Inflammatory cytokines and potential signaling molecules expressions were determined by RT-qPCR and Western blot.Intracellular ROS level was quantified by fluorescent probe.Results:Increased ROS level was observed in LPS-stimulated and Niclosamide-pretreatment cells(P<0.05).Compared with control group,mRNA and protein expressions of S100A4 were increased(P<0.05),TLR4/STAT3,MAPK1/3/SIRT1,NF-κB/IKKβ/p65 mRNA expressions were increased(P<0.05),inflammatory cytokines IL-1βand IL-6,tight junction Occludin and ZO-1 mRNA expressions were increased after LPS-treatment(P<0.05),whereas these genetic expressions were downregulated by Niclosamide-pretreatment(P<0.05),except for TLR4/MAPK1 and NF-κB/IKKβ/p65(P>0.05).Western blot showed that compared with control group,LPS-stimulation promoted protein expressions of S100A4,STAT3,MAPK3/SIRT1,IL-1βand TNF-α(P<0.05),while downregulated protein expression of Occludin.Compared with LPS group,niclosamide-pretreatment downregulated protein expressions of S100A4,STAT3,MAPK3/SIRT1,IL-1βand TNF-α(P<0.05),while restored protein expression of Occludin(P<0.05).Conclusion:Calcium-binding protein S100A4 inhibitor Niclosamide can alleviate S100A4 expression and inflammatory response of bronchial epithelial cells,which is poten-tially related to STAT3 or MAPK3/SIRT1 signaling.

关 键 词：支气管上皮细胞 LPS S100A4 NICLOSAMIDE ROS 紧密连接 炎症反应 

分 类 号：R392.5[医药卫生—免疫学]