首都医科大学学报 ›› 2006, Vol. 27 ›› Issue (4): 476-479.

• 基础研究 • 上一篇    下一篇

组蛋白脱乙酰化酶在α-突触核蛋白抑制酪氨酸羟化酶表达中的作用

王雪梅, 陈彪   

  1. 首都医科大学宣武医院神经内科, 神经生物学室
  • 收稿日期:2005-11-30 修回日期:1900-01-01 出版日期:2006-08-24 发布日期:2006-08-24
  • 通讯作者: 陈 彪

Histone Deacetylase Maybe Involved in the Mechanism of Inhibition of Tyrosine Hydroxylase Expression in α-Synuclein-Transfected Dopaminergic Neuronal Cells

Wang Xuemei, Chen Biao   

  1. Department of Neurology, Department of Neurobiology, Xuanwu Hospital, Capital University of Medical Sciences
  • Received:2005-11-30 Revised:1900-01-01 Online:2006-08-24 Published:2006-08-24

摘要: 目的 探讨组蛋白脱乙酰化酶(histone deacetylase,HDAC)参与α-突触核蛋白(α-synuclein,α-Syn)的过表达抑制酪氨酸羟化酶(tyrosine hydroxylase, TH)的可能机制.方法 利用HDAC活性检测试剂盒检测MES 23.5多巴胺能神经细胞系和稳定转染α-Syn的细胞中HDAC的活性差异,应用Western-blot及RT-PCR检测转染α-Syn细胞系中HDAC抑制剂--曲古抑菌素A(trichostatin A,TSA)对TH表达的影响.结果 在转染α-Syn的细胞系中HDAC的活性显著高于未转染组;TSA增加了转染细胞内TH蛋白和mRNA的表达(P<0.05).结论 HDAC参与了多巴胺能神经元中α-Syn抑制TH表达的机制.

关键词: α-突触核蛋白, 酪氨酸羟化酶, 组蛋白脱乙酰化酶, 帕金森病

Abstract: Objective To investigate the mechanism of inhibition of tyrosine hydroxylase(TH) expression in α-Syn-transfected dopaminergic neuronal cells,specifically whether or not α-Syn inhibits TH activity through affecting histone deacetylase(HDAC).Methods Histone deacetylase activity assay kit was used to measure the difference of HDAC activity in transfected cells and control cells.After treatment with the inhibitor of HDAC(TSA) in transfected cells,the expression of TH was determined by RT-PCR and Western-blot,respectively.Results The HDAC activity in the transfected cells was significantly higher than in the control cells.After inhibiting the HDAC activity in transfected cells by TSA to the level of control cells,the expression of TH was up-regulated both at mRNA and protein levels.Conclusion These results suggested that HDAC was involved in the mechanism of inhibition of tyrosine hydroxylase expression in α-Syn-transfected dopaminergic neuronal cells.

Key words: α-Synuclein, tyrosine hydroxylase, histone deacetylase, Parkinson disease

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