基础医学与临床 ›› 2012, Vol. 32 ›› Issue (1): 16-20.

• 研究论文 • 上一篇    下一篇

PINK1参与调节多巴胺的合成

贾焕珍1,鲁玲玲1,高华2,龚普盛1,付越姣1,赵春礼1,段春礼3,赵焕英3,张建亮1,杨慧4   

  1. 1. 首都医科大学北京神经科学研究所
    2.
    3. 首都医科大学神经科学研究所
    4. 首都医科大学神经生物学系 北京神经科学研究所
  • 收稿日期:2011-07-28 修回日期:2011-11-24 出版日期:2012-01-05 发布日期:2011-12-28
  • 通讯作者: 杨慧 E-mail:yanghui0105@sina.com
  • 基金资助:
    国家重点基础研究发展计划;国家自然科学基金;北京市教育委员会科技发展计划重点项目;北京市自然基金面上项目;北京市高校人才强教资助PHR

The regulatory effects of PINK1 on dopamine biosynthesis

  • Received:2011-07-28 Revised:2011-11-24 Online:2012-01-05 Published:2011-12-28
  • Supported by:
    ;The National Natural Science Foundation of China

摘要: [摘要] 目的:探讨PINK1基因对多巴胺合成的调节作用。方法:用高压液相色谱(HPLC)电化学方法检测多巴胺(Dopamine,DA)含量,用蛋白印迹法(Western blots)和Real-Time PCR法检测DA合成限速酶酪氨酸羟化酶(tyrosine hydroxylase, TH)和多巴脱羧酶(dopa decarboxylase, DDC)的表达量,通过免疫共沉淀(Co-immunopricipitation, Co-IP)和免疫组织染色的方法观察PINK1和TH之间是否存在相互作用。结果:PINK1基因敲减后,细胞内DA水平为5.356±0.536ng/ml显著低于对照组的11.63±1.559ng/ml(p<0.05),TH mRNA和蛋白的表达分别为0.3713±0.1403 和0.1956 ±0.06212,显著低于control组的1.009±0.1528和0.3861±0.04455(p<0.05), DDC mRNA和蛋白的表达分别为0.3963±0.1241和0.1492 ±0.02940,显著低于control组的1.100±0.07042和0.3231±0.03758(p<0.05);免疫荧光化学检测PINK1和TH存在共定位,Co-IP显示PINK1和TH存在相互作用。结论:PINK1可以通过调控DA的合成酶TH和DDC的表达影响DA的合成。

关键词:  关键词:PINK1, RNA干扰, 酪氨酸羟化酶, MN9D细胞

Abstract: Abstract: Objective To explore the role for PINK1 in the regulation of dopamine biosynthesis. Methods The dopaminergic MN9D cell was used as a cell model for the present study. PINK1 gene was knockdown by RNAi technique. The dopamine (DA) level, mRNA and protein expression level of (tyrosine hydroxylase, TH) and (dopa decarboxylase, DDC) were then detected by HPLC with electrochemical detection, real-time RT-PCR or Western blots 48h later, respectively. The association between PINK1 and TH was observed with Co-immunoprecipitation and immunohistochemistry. Results When PINK1 was silenced, DA content was 5.356±0.536ng/ml significantly lower than the control group of 11.63 ± 1.559ng/ml (p<0.05), TH mRNA and protein expression were 0.3713±0.1403 and 0.1956 ±0.06212 significantly lower than that of control group 1.009±0.1528 and 0.3861±0.04455(p<0.05),DDC mRNA and protein expression were 0.3963±0.1241 and 0.1492 ±0.02940 significantly lower than that of control group1.009±0.1528 and 0.3861±0.04455, respectively.(p<0.05) Conclusion PINK1 had a regulatory effect on dopamine biosynthesis, which is caused by its influence on TH and DDC, two important enzymes for DA synthesis.

Key words: Key word: PINK1, RNA interference, tyrosine hydroxylase, MN9D cells

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