首都医科大学学报 ›› 2014, Vol. 35 ›› Issue (5): 596-600.doi: 10.3969/j.issn.1006-7795.2014.05.015

• α-突触核蛋白改变对神经元的影响 • 上一篇    下一篇

α-突触核蛋白促进原代神经元及转基因小鼠神经细胞表面NMDA受体的内在化

陈予东, 杨巍巍, 李昕, 王鹏, 李旭冉, 于顺   

  1. 首都医科大学宣武医院神经生物学研究室 北京市老年病医疗研究中心分子诊断实验室 教育部神经变性病重点实验室, 北京 100053
  • 收稿日期:2014-07-21 出版日期:2014-10-21 发布日期:2014-10-20
  • 通讯作者: 于顺 E-mail:yushun103@163.com
  • 基金资助:

    国家自然科学基金(81071014),国家重点基础发展计划(973计划)(2011CB504101),国家科技支撑计划课题(2012BAI10B03),首都卫生发展科研专项课题(首发2011-1001-01),北京市自然科学基金(7102076)。

Alpha-synuclein promotes internalization of surface N-methyl-D-aspartate receptors in primary neurons and transgenic mice

Chen Yudong, Yang Weiwei, Li Xin, Wang Peng, Li Xuran, Yu Shun   

  1. Department of Neurobiology, Xuanwu Hospital, Capital Medical University; Laboratory of Molecular Diagnosis, Beijing Geriatric Medical Research Center; Key Laboratory of Neurodegenerative Disease, Ministry of Education, Beijing 100053, China
  • Received:2014-07-21 Online:2014-10-21 Published:2014-10-20
  • Supported by:

    This study was supported by National Natural Science Foundation of China (81071014), National Basic Research and Development Program (973 Program) of China (2011CB504101), National Science and Technology Support Program (2012BAI10B03), Capital Health Research and Development Project (SHOUFA 2011-1001-01), Natural Science Foundation of Beijing (7102076).

摘要:

目的 在原代培养神经元及转基因动物水平上,研究α-突触核蛋白(α-synuclein, α-Syn)对神经细胞表面N-甲基-D-天门冬氨酸(N-methyl-D-aspartate,NMDA)受体的影响及其机制。方法 免疫荧光标记法和Western blotting测定NMDA受体(NMDA receptor, NMDAR)和Rab5B质量分数。Rab5B反义寡核苷酸抑制 Rab5B 基因表达。以原代培养神经细胞及转基因小鼠为模型, 观察α-Syn蛋白增多对细胞膜NMDAR质量分数的影响以及Rab5B的作用。结果 在细胞及动物水平,α-Syn明显上调 Rab5B 表达,促进NMDAR的内在化。而抑制Rab5B表达可消除α-Syn致NMDAR的内在化。结论 α-Syn通过上调 Rab5B 的表达促进NMDAR的内在化。

关键词: α-突触核蛋白, 转基因小鼠, 原代神经元, N-甲基-D-天门冬氨酸, 内在化

Abstract:

Objective To investigate the effect of α-synuclein (α-Syn) on surface N-methyl-D-aspartate (NMDA) receptors on the primary neurons and transgenic mice.Methods Immunofluorescent labeling and Western blotting analysis were used to measure the alterations of NMDA receptors and Rab5B proteins. Rab5B antisense oligonucleotides were applied to suppress Rab5B expression. The primary neurons and transgenic mice were used as models to observe the effect of α-Syn on the surface NMDAR expression.Results α-Syn triggered a significant decrease of the surface NMDAR expression. This effect of α-Syn was blocked by suppression of Rab5B expression. Conclusion α-Syn promotes internalization of surface NMDA receptors by increasing Rab5B expression.

Key words: α-synuclein, transgenic mice, primary neurons, N-methyl-D-aspartate, internalization

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