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人 参 二 醇 对 APP-SH-SY5Y 细 胞 中 Tau 蛋 白 磷 酸 化 及 Fyn/

        GluN2B信号通路的影响                         Δ


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        梁喜才 ,蔺 莹 ,肖洪贺 ,孔 亮 ,杨静娴 (1.辽宁中医药大学实验动物中心,沈阳 110847;2.辽宁中医药
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        大学药学院,辽宁 大连 116600)
        中图分类号 R966          文献标志码 A          文章编号 1001-0408(2021)12-1485-07
        DOI  10.6039/j.issn.1001-0408.2021.12.13
        摘  要   目的:研究人参二醇(PD)对转染APP基因的人神经母细胞瘤细胞SH-SY5Y(APP-SH-SY5Y)中Tau蛋白磷酸化的影响及
        其作用机制。方法:采用分子对接技术验证 PD 与非受体酪氨酸激酶 Fyn 的靶向性。在体外培养 SH-SY5Y 细胞,构建
        APP-SH-SY5Y细胞模型和绿色荧光蛋白(GFP)-SH-SY5Y细胞模型(对照细胞),通过检测细胞中β淀粉样蛋白(Aβ1-42 )的表达来验
        证 APP-SH-SY5Y 细胞模型是否构建成功。以 GFP-SH-SY5Y 细胞为对照,采用 CCK-8 法检测 5、10、20、30、40 μmol/L 的 PD 和
        125、250、500、1 000、2 000 nmol/L的PP2(Fyn抑制剂,阳性对照)作用24 h对APP-SH-SY5Y细胞存活率的影响,以确定最佳给药
        浓度。以APP-SH-SY5Y细胞为对象,分别检测最佳浓度PD、PP2作用24后细胞中Ca 浓度及磷酸化Tau蛋白(p-Tau)/Tau、磷酸化
                                                                         2+
        非受体酪氨酸激酶Src(p-Src)/Fyn、磷酸化谷氨酸受体2B(p-GluN2B)/GluN2B比值。结果:分子模拟对接结果显示,PD可靶向结
        合Fyn蛋白。与GFP-SH-SY5Y细胞比较,APP-SH-SY5Y细胞中Aβ 1-42蛋白表达水平显著升高(P<0.01)。PD和PP2的最佳作用
        浓度分别为20 μmol/L和500 nmol/L。20 μmol/L PD、500 nmol/L PP2均可显著升高细胞的存活率,显著降低细胞中Ca 浓度以及
                                                                                                   2+
                                                                                                      2+
        p-Tau/Tau、p-Src/Fyn、p-GluN2B/GluN2B比值。结论:PD可通过抑制Fyn/GluN2B信号通路来降低APP-SH-SY5Y细胞中Ca 浓度
        及Tau蛋白的磷酸化水平。
        关键词    人参二醇;转染APP基因的人神经母细胞瘤细胞SH-SY5Y;Tau蛋白;磷酸化;非受体酪氨酸激酶Fyn/谷氨酸受体2B信
        号通路

        Effects of Panaxadiol on Tau Protein Phosphorylation and Fyn/GluN2B Signaling Pathway in APP-SH-
        SY5Y Cells
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        LIANG Xicai ,LIN Ying ,XIAO Honghe ,KONG Liang ,YANG Jingxian (1. Laboratory Animal Center,
        Liaoning University of TCM,Shenyang 110847,China;2. College of Pharmacy,Liaoning University of TCM,
        Liaoning Dalian 116600)
        ABSTRACT    OBJECTIVE:To study the effects and mechanism of panaxadiol(PD) on Tau protein phosphorylation in the
        SH-SY5Y cells transfected with APP gene(APP-SH-SY5Y). METHODS:The target of PD and non-receptor tyrosine kinases Fyn
        was verified by molecular docking. SH-SY5Y cells were cultured in vitro,and the APP-SH-SY5Y cell models and green fluorescent
       (GFP)-SH-SY5Y cell model(control cell)was constructed. The expression of Aβ 1-42 was detected so as to verify the success of
        APP-SH-SY5Y cell model. Taking GFP-SH-SY5Y cells as control,the effects of 5,10,20,30,40 μmol/L PD and 125,250,
        500,1 000,2 000 nmol/L PP2(Fyn inhibitor,positive control)on the survival rate of APP-SH-SY5Y cells were detected by
        CCK-8 assay after treated for 24 h, so as to confirm the optimal concentration. The concentration of Ca 2 +  , the ratio
        fophosphorylated Tau protein(p-Tau)/Tau,phosphorylatedn Src(p-Src)/Fyn and phosphorylated glutamate receptor2B(p-GluN2B)/
        GluN2B were detected in APP-SH-SY5Y cells after trated with the optimal concentration of PD and PP2 for 24 h. RESULTS:The
        results of molecular simulation docking showed that PD could target Fyn protein. Compared with GFP-SH-SY5Y cells,the protein
        expression of Aβ 1-42 in APP-SH-SY5Y cell were increased significantly(P<0.01). The optimal concentration of PD and PP2 were
        20 μmol/L and 500 nmol/L. The 20 μmol/L PD and 500 nmol/L PP2 could increase the survival rate of the cells and reduced the
        concentration of Ca ,the ratio of p-Tau/Tau,p-Src/Fyn,and p-GluN2B/GluN2B. CONCLUSIONS:PD can reduce the the
                       2 +
        phosphorylation of Tau protein through inhibiting Fyn/GluN2B signaling pathway.
        KEYWORDS    Panaxadiol;APP-SH-SY5Y cells;Tau protein;Phosphorylation;Fyn/GluN2B signaling pathway


           Δ 基金项目:辽宁省教育厅科学技术研究项目(No.L202036)                   阿尔茨海默病(Alzheimer’s disease,AD)是一种进
           *助理实验师,硕士。研究方向:神经药理学。电话:024-
                                                           行性的神经退行性疾病,患者通常会出现以记忆力衰
        31207049。E-mail:1083773791@qq.com
                                                           退、学习能力减弱为主的症状,并伴有情绪调节障碍以
           # 通信作者:教授,博士生导师,博士。研究方向:神经药理学。
                                                                          [1]
        电话:0411-87586009。E-mail:jingxianyang63@126.com     及运动能力丧失 。目前主流观点认为,AD 的病因与

        中国药房    2021年第32卷第12期                                            China Pharmacy 2021 Vol. 32 No. 12  ·1485 ·
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