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神经节苷脂GM1对6-OHDA诱导的PC12细胞氧化应激的保护作用
作者:刘莉  
单位:武汉大学中南医院血液科
关键词:6-羟基多巴胺 PC12细胞 PI3K 氧化应激 GM1 
分类号:
出版年·卷·期(页码):2014·42·第四期(385-388)
摘要:

目的:用6-羟基多巴胺(6-OHDA)作用PC12细胞建立帕金森病细胞模型,观察6-OHDA 诱导PC12发生氧化应激,以及GM1对细胞氧化损伤的保护作用。方法:将细胞随机分为对照组和实验组,对照组于正常培养基生长,实验组以不同浓度6-OHDA,GM1和50 μmol/L PI3-K抑制剂LY294002处理。用MTT法检测细胞存活率,利用2’7’-二乙酰二氯荧光素(DCFH-DA)检测细胞内活性氧(ROS)水平,测定细胞内脂质过氧化物(MDA)和钠钾ATP酶水平,流式细胞仪检测细胞凋亡率。结果:GM1预处理组与单纯6-OHDA实验组相比,PC12细胞存活率升高,钠钾ATP酶活性恢复,ROS和MDA水平降低,凋亡率下降;以PI3-K抑制剂LY294002预处理阻断PI3-K信号后,GM1对氧化损伤的保护作用减弱。结论:GM1对6-OHDA引起的细胞氧化应激损伤有保护作用,这种保护作用可能是通过启动PI3-K信号通路产生的。

Objective: To establish a model of oxidative injury of Parkinson’s disease with PC12 cells treated b y 6-OHDA. To study the protective effect of GM1 on oxidative stress injury and potential mechanism involved . Methods : Cells were divided into control group and treated groups at random. Control group was maintained in normal medium; treated groups were exposed to 120μmol/L 6-OHDA with different concentrations of GM1 and 50 μmol/L LY294002. The MTT assay was used to evaluate the viability of PC12. The level of ROS was detected by staining cells with DCFH-DA. The contents of MDA and Na+K+ATPase were also determined. The apoptotic ratio was determined by flow cytometry (FCM). Result: In compare with that of cell treated by 6-OHDA only, the viability of cell treated by GM1 was added, and Na+K+ATPase activity was recovered with the concentrations of NGF increasing. The levels of ROS and MDA were lower in groups treated by GM1 than control. Conclusion GM1 have the protective effect on oxidative stress injury in PC12 cell induced by 6-OHDA. The Protective Effect of GM1 on oxidative stress of Parkinson’s Disease may rely on the activation of PI3-K/Akt and Nrf2 pathway.

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