首都医科大学学报 ›› 2011, Vol. 32 ›› Issue (1): 79-83.

• 神经退行性病的基础研究 • 上一篇    下一篇

淫羊藿苷对基因转染PC12细胞α-突触核蛋白过表达和泛素蛋白酶体系统的影响

刘莹1,2,3,张兰1,2,李雅莉1,2,李林1,2*   

  1. 1. 首都医科大学宣武医院药物研究室; 2. 教育部神经变性病重点实验室; 3. 首都医科大学附属北京儿童医院药剂科
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-02-21 发布日期:2011-02-21
  • 通讯作者: 李林

Effects of Icariin on α-synuclein Over-expression and Ubiquitinproteasome System in Gene-transfected PC12 Cells

LIU Ying1,2,3, ZHANG Lan1,2, LI Ya-li1,2, LI Lin1,2*   

  1. 1. Department of Pharmacology, Xuanwu Hospital, Capital Medical University; 2. Key Laboratory for Neurodegenerative Diseases, Ministry of Education; 3. Department of Pharmacy, Beijing Children’s Hospital, Capital Medical University
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-02-21 Published:2011-02-21
  • Contact: LI Lin

摘要:

目的 观察淫羊藿苷在体外试验中对α-突触核蛋白(α-synuclein, α-Syn)及相关蛋白表达的影响及其作用机制。
方法 不同浓度的淫羊藿苷与转染α-Syn基因PC12细胞共孵育24 h,应用RT-PCR法检测各组细胞α-Syn mRNA含量,Western免疫印迹法检测细胞中α-Syn、泛素化蛋白羧基端水解酶(Ubiquitin C-terminal hydrolase protein,UCH-L1)和Parkin蛋白的表达,观察淫羊藿苷对它们的影响。
结果 淫羊藿苷浓度40~80 μmol/L与转染α-Syn基因细胞孵育24 h,能够明显减少模型细胞中α-Syn mRNA含量,抑制Syn蛋白表达和聚集,增强UCH-L1和Parkin蛋白表达。
结论 淫羊藿苷在体外对基因转染细胞的α-Syn过表达和聚集有明显抑制作用,其作用机制与抑制α-Syn合成和增强α-Syn降解有关。

关键词: 淫羊藿苷, 淫羊藿, &alpha, -突触核蛋白, 泛素-蛋白酶体系统, PC12细胞, 体外试验

Abstract:

Objective To explore the effects of icariin, an effective component of Epimedium, on the over-expression and aggregation of α-synuclein(α-Syn) and other protein in vitro and mechanisms of the effects.
Methods Different concentrations of icariin were incubated with α-Syn gene-transfected PC12 cells for 24 h. The change in α-Syn mRNA content in the cells was determined by RT-PCR. The protein expression of α-Syn, UCH-L1 and Parkin was measured by Western blotting.
Results Incubation of icariin(40~80 μmol/L) with α-Syn gene-transfected PC12 cells for 24 h significantly decreased α-Syn mRNA content, inhibited α-Syn protein expression and aggregation, and enhanced the protein expression of UCH-L1 and Parkin in the model cells.
Conclusion Icariin inhibited the over-expression and aggregation of α-Syn in gene-tranfected PC12 cells in vitro, and the mechanisms may be related to the inhibition of synthesis and the enhancement of degradation of α-synuclein.

Key words: icariin, epimedium, &alpha, -Synuclein, ubiquitin-proteasome system, PC12 cell, in vitro

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