阿魏酸对脂多糖损伤的PC12细胞和大鼠海马神经元细胞的保护作用

被引:18
作者
黄浩 [1 ,2 ]
马增春 [2 ]
王宇光 [2 ]
高月 [2 ]
机构
[1] 北京工业大学生命科学与生物工程学院
[2] 军事医学科学院放射与辐射医学研究所
关键词
阿魏酸; 磷酸二酯酶4B; 脂多糖; c AMP反应元件结合蛋白;
D O I
暂无
中图分类号
R285.5 [中药实验药理];
学科分类号
100806 [中药药理学];
摘要
目的探讨阿魏酸(FA)对脂多糖(LPS)诱导的PC12细胞和大鼠海马神经元损伤的保护作用,并探讨其可能的作用机制。方法体外实验:FA 2.5~40μmol·L-1与PC12细胞预处理12 h,加入LPS 0.15 g·L-1继续培养8 h,采用CCK-8法检测细胞活力;ELISA法检测细胞培养上清中肿瘤坏死因子α(TNF-α)和白细胞介素1β(IL-1β)的释放;激光共聚焦显微镜检测细胞骨架蛋白F肌动蛋白的表达。体内实验:FA 25,50和100 mg·kg-1ip给予SD大鼠,每天1次,连续35 d。给药第29天时ip给予LPS 0.2 mg·kg-1,每天1次,连续7 d,运用免疫组织化学法观察大鼠海马神经元磷酸二酯酶4B(PDE4B)蛋白表达的变化;Western蛋白质印迹法检测c AMP反应元件结合蛋白(CREB)和磷酸化CREB(p-CREB)表达。结果体内实验:与LPS组细胞比较,FA 10,20和40μmol·L-1预处理组细胞活力明显升高(P<0.05),炎性因子TNF-α和IL-1β的释放显著减少(P<0.05),细胞骨架蛋白F肌动蛋白的分布和结构明显改善。体内实验:HE染色结果显示,预先给予FA 50和100 mg·kg-1可以减轻LPS诱导的大鼠海马神经元损伤;免疫组织化学实验结果显示,FA 50和100 mg·kg-1能够显著降低LPS诱导的大鼠海马神经元PDE4B蛋白表达水平的升高(P<0.05);Western蛋白印迹实验结果表明,FA 50和100 mg·kg-1可逆转LPS对CREB和p-CREB蛋白表达的抑制作用(P<0.05)。结论 FA对LPS诱导的PC12细胞和大鼠海马神经元细胞损伤有保护作用,FA抗神经炎症的作用可能与抑制PDE4表达、激活c AMP/CREB信号通路相关。
引用
收藏
页码:330 / 337
页数:8
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