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 点击下载
论文标题: 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
英文标题:
中文摘要: 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、40μmol/L的PD和125、250、500、1000、2000nmol/L的PP2(Fyn抑制剂,阳性对照)作用24h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Ca2+浓度及磷酸化Tau蛋白(p-Tau)/Tau、磷酸化非受体酪氨酸激酶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Aβ1-42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20μmol/L和500nmol/L。20μmol/LPD、500nmol/LPP2均可显著升高细胞的存活率,显著降低细胞中Ca2+浓度以及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Ca2+浓度及Tau蛋白的磷酸化水平。
英文摘要: 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-SY 5Y cells were cultured in vitro ,and the APP-SH-SY 5Y cell models and green fluorescent (GFP)-SH-SY5Y cell model (control cell )was constructed. The expression of Aβ1-42 was detected so as to verify the success of APP-SH-SY5Y cell model. Taking GFP-SH-SY 5Y cells as control ,the effects of 5,10,20,30,40 μmol/L PD and 125,250, 500,1 000,2 000 nmol/L PP 2(Fyn inhibitor ,positive control )on the survival rate of APP-SH-SY 5Y 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 receptor 2B(p-GluN2B)/ GluN2B were detected in APP-SH-SY 5Y cells after trated with the optimal concentration of PD and PP 2 for 24 h. RESULTS :The results of molecular simulation docking showed that PD could target Fyn protein. Compared with GFP-SH-SY 5Y cells ,the protein expression of Aβ1-42 in APP-SH-SY 5Y cell were increased significantly (P<0.01). The optimal concentration of PD and PP 2 were 20 μmol/L and 500 nmol/L. The 20 μmol/L PD and 500 nmol/L PP 2 could increase the survival rate of the cells and reduced the concentration of Ca 2+,the ratio of p-Tau/Tau ,p-Src/Fyn,and p-GluN 2B/GluN2B. CONCLUSIONS:PD can reduce the the phosphorylation of Tau protein through inhibiting Fyn/GluN 2B signaling pathway.
期刊: 2021年第32卷第12期
作者: 梁喜才,蔺莹,肖洪贺,孔亮,杨静娴
英文作者: LIANG Xicai,LIN Ying,XIAO Honghe ,KONG Liang,YANG Jingxian
关键字: 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
KEYWORDS: Panaxadiol;APP-SH-SY5Y cells ;Tau protein ;Phosphorylation;Fyn/GluN2B signaling pathway
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