Journal of Capital Medical University ›› 2015, Vol. 36 ›› Issue (5): 740-746.doi: 10.3969/j.issn.1006-7795.2015.05.015

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Parkinson's disease related gene PINK1 but not DJ-1 was down-regulated in neurotoxicity of 6-hydroxydopamine and 1-methyl-4-phenylpyridinium

Yang Jian1,2, Wang Yong2,3, Wang Xuan2,3, Yang Zhaofei1,2, Gong Xiaoli2,3, Wang Xiaomin1,2   

  1. 1. Key Laboratory for Neurodegenerative Disorders of the Ministry of Education, Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China;
    2. Beijing Institute for Brain Disorders, Beijing 100069, China;
    3. Key Laboratory for Neurodegenerative Disorders of the Ministry of Education, Department of Physiology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China
  • Received:2015-09-14 Online:2015-10-21 Published:2015-10-20
  • Contact: 王晓民 E-mail:xmwang@ccmu.edu.cn
  • Supported by:
    This study was supported by Major State Basic Research Development Program of the China (973 Program) (2011CB504100), Natural Science Foundation of Beijing (7082008), Project of Construction of Innovative Teams and Teacher Career Development for Universities and Colleges under Beijing Municipal Education Commission (IDHT20140514).

Abstract: Objective To explore the transcriptional levels and molecular mechanism of key Parkinson's disease (PD)-related genes DJ-1 and PINK1 in neurotoxicity. Methods MN9D cells were used as dopaminergic neurons and treated with neurotoxins 6-hydroxydopamine (6-OHDA) and 1-methyl-4-phenylpyridinium (MPP+). Lethal doses 50 (LD 50) was determined by cell counting with Typan Blue staining. Transcriptional levels of DJ-1, PINK1 and demethylation enzyme TET1 were detected by semi-quantitative RT-PCR. Expressional levels of demethylation enzyme TET1 were detected by immune-cytofluorescent staining. Results LD50 at 10 μmol/L of 6-OHDA and 100 μmol/L of MPP+ were used to treat MN9D cells. In neurotoxicity of 6-OHDA and MPP+, transcriptional levels of PINK1 were significantly down-regulated, but no change in DJ-1 transcriptional levels was found. In addition, transcriptional and expressional levels of TET1 were down-regulated in neurotoxicity of 6-OHDA and MPP+. Conclusion These data suggest that down-regulated TET1 might contribute to the down-regulation of PINK1 in neurotoxicity of PD.

Key words: Parkinson's disease, neurotoxicity, PINK1, DJ-1, Ten-eleven translocation 1

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