吉林大学学报(医学版) ›› 2021, Vol. 47 ›› Issue (2): 338-343.doi: 10.13481/j.1671-587X.20210212

• 基础研究 • 上一篇    下一篇

Ndfip1对铁离子诱导的神经细胞凋亡的抑制作用及其神经保护作用机制

赵展琦,张程锦,田娟()   

  1. 锦州医科大学组织胚胎学教研室, 辽宁 锦州 121001
  • 收稿日期:2020-02-27 出版日期:2021-03-28 发布日期:2021-03-25
  • 通讯作者: 田娟 E-mail:tian555juan555@sina.com
  • 作者简介:赵展琦(1988-),男,黑龙江省齐齐哈尔市人,医师,医学硕士,主要从事金属离子与神经退行性疾病方面的研究。
  • 基金资助:
    辽宁省“双一流”建设项目(30320191022);辽宁省教育厅大学生创新训练项目(201910160092)

Inhibitory effect of Ndfip1 on ferrion-induced neuronal apoptosis and its neuroprotective mechanism

Zhanqi ZHAO,Chengjin ZHANG,Juan TIAN()   

  1. Department of Histology and Embryology,Jinzhou Medical University,Jinzhou 121001,China
  • Received:2020-02-27 Online:2021-03-28 Published:2021-03-25
  • Contact: Juan TIAN E-mail:tian555juan555@sina.com

摘要: 目的

观察铁超载条件下跨膜蛋白Nedd4家族反应蛋白1(Ndfip1)过表达对神经细胞凋亡的抑制作用,探讨Ndfip1对神经细胞的保护作用机制。

方法

分别以Ndfip1质粒和空质粒转染的人神经母细胞瘤SH-SY5Y细胞分为实验组和对照组。在铁离子超载条件下,采用MTT比色法测定2组细胞生存率,采用活性氧(ROS)和丙二醛(MDA)检测试剂盒检测2组细胞中ROS水平和MDA水平,Western blotting法测定2组细胞中B细胞淋巴瘤2(Bcl-2)、Bcl-2相关X蛋白(Bax)和含半胱氨酸的天冬氨酸蛋白水解酶3(caspase-3)的蛋白表达水平。

结果

与对照组比较,实验组细胞生存率明显升高(P<0.05)。实验组细胞内荧光强度明显弱于对照组,即实验组细胞中ROS水平明显低于对照组。与对照组比较,实验组细胞中MDA水平明显降低(P<0.05),细胞中Bcl-2蛋白表达水平明显升高(P<0.05),Bax和caspase-3蛋白表达水平明显降低(P<0.05)。

结论

Ndfip1可以减轻铁离子超载诱导的神经细胞凋亡,提高细胞生存率,对神经细胞具有保护作用;其作用机制可能与减轻细胞内氧化应激反应和抑制凋亡途径有关。

关键词: Nedd4家族反应蛋白1, 铁离子, 神经细胞, 细胞凋亡, 氧化应激

Abstract: Objective

To observe the inhibitory effect of Nedd4 family interacting protein 1(Ndfip1)overexpression on the apoptosis of nerve cells under the conditions of iron overload, and to explore the protective mechanism of Ndfip1 in nerve cells.

Methods

The SH-SY5Y cells in experimental group were transfected with Ndfip1 plasmid, and the SH-SY5Y cells in control group were transfected with empty plasmid. MTT method was used to determine the survival rates of SH-SY5Y cells in two groups under the condition of iron overload. The levels of reactive oxygen species(ROS) and malondialdehyde (MDA) in the cells in two groups were detected by ROS and MDA detection kits. The expression levels of B-cell lymphoma-2 (Bcl-2), Bcl-2-associated X protein (Bax) and cysteinyl aspartate specific proteinase-3 (caspase-3) proteins in the cells were detected by Western blotting method.

Results

Compared with control group, the survival rate of cells in experimental group was significantly increased (P<0.05);compared with control group, the fluorescence of cells in experimental group was significantly weakened, indicating that the ROS level was reduced.Compared with control group, the level of MDA in experimental group was significantly reduced(P<0.05);the expression level of Bcl-2 protein in the cells in experimental group was increased(P<0.05),and the expression levels of Bax protein and caspase-3 protein in the cells in experimental group were decreased(P<0.05).

Conclusion

Ndfip1 could reduce the apoptosis induced by iron overload, improve the survival rate of nerve cells,and has protective effect on the nerve cells;its mechanism may be related to reducing the oxidative stress response and inhibiting the apoptosis pathway.

Key words: Nedd4 family interacting protein 1, iron, nerve cells, apoptosis, oxidative stress

中图分类号: 

  • R329.3