首都医科大学学报 ›› 2011, Vol. 32 ›› Issue (6): 771-776.doi: 10.3969/j.issn.1006-7795.2011.06.013

• 帕金森病的发病机制研究 • 上一篇    下一篇

α-突触核蛋白促进过氧化氢诱导的多巴胺能神经细胞凋亡

李瑛1, 刘光伟1, 李昕1, 李尧华1, 杨慧2, 于顺1   

  1. 1. 首都医科大学宣武医院神经生物学研究室,教育部神经变性病重点实验室,北京市老年病医疗研究中心分子诊断实验室, 北京 100053;2. 首都医科大学神经科学研究所, 北京 100069
  • 收稿日期:2011-10-16 修回日期:1900-01-01 出版日期:2011-12-21 发布日期:2011-12-21
  • 通讯作者: 于顺

α-Synuclein promotes hydrogen peroxide-induced apoptosis of dopaminergic neuronal cells

LI Ying1, LIU Guang-wei1, LI Xin1, LI Yao-hua1, YANG Hui2, YU Shun1   

  1. 1. Department of Neurobiology, Xuanwu Hospital, Capital Medical University;Key Laboratory of Neurodegenerative Diseases, Ministry of Education;Laboratory of Molecular Diagnosis, Beijing Geriatric Medical Research Center, Beijing, 100053, China;2. Beijing Institute for Neuroscience, Capital Medical University, Beijing 100069, China
  • Received:2011-10-16 Revised:1900-01-01 Online:2011-12-21 Published:2011-12-21

摘要: 目的 研究α-突触核蛋白(α-synuclein,α-syn)在过氧化氢(hydrogen peroxide,H2O2)诱导的多巴胺能神经细胞凋亡中的作用。方法 通过瞬时转染重组质粒pEGFP-α-syn和pcDNA-α-syn到MES23.5多巴胺能神经细胞建立过表达α-syn细胞模型。细胞外添加H2O2(200 μmol/L)处理细胞。Hoechst 33258荧光标记细胞核及AO/PI(吖啶橙/碘化丙啶)双染检测细胞凋亡。Mitotracker线粒体探针标记线粒体。结果 H2O2可增加α-syn向线粒体和细胞核的转运;H2O2可单独引起细胞凋亡,但过表达α-syn细胞的凋亡率显著高于空载质粒转染细胞(P<0.05)。结论 α-Syn增强了H2O2诱导的多巴胺能神经细胞凋亡。

关键词: α-突触核蛋白, 过氧化氢, 凋亡

Abstract: Objective To investigate the role of α-synuclein (α-syn) in hydrogen peroxide(H2O2)-induced apoptosis of dopaminergic neuronal cells. Methods α-Syn overexpression cell model was established by transient transfection of plasmids pEGFP-α-syn or pcDNA-α-syn into MES23.5 dopaminergic neuronal cells. The cells were treated with H2O2(200 μmol/L) to induce cell apoptosis. Hoechst 33258 and AO/PI fluorescent labeling were used to examine apoptosis. Mitochondrial probe Mitotracker was used to label mitochondria. Results H2O2 increased translocation of α-syn into mitochondria and nuclei and induced apoptosis of both the vector control cells and α-syn overexpression cells. More apoptotic cells were found in α-syn overexpression cells than in vector control cells(P<0.05). Conclusion α-Syn enhances H2O2-induced apoptosis of dopaminergic neuronal cells.

Key words: α-synuclein, hydrogen peroxide, apoptosis

中图分类号: