中国神经再生研究(英文版) ›› 2014, Vol. 9 ›› Issue (8): 878-887.doi: 10.4103/1673-5374.131607

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

大麻素致三叉神经节细胞内[Ca2+]i升高的调控效应

  

  • 收稿日期:2014-03-21 出版日期:2014-04-25 发布日期:2014-04-25
  • 基金资助:

    国家自然科学基金 (No. 30271500, 30571537,81370246)

Regulatory effects of anandamide on intracellular Ca2+ concentration increase in trigeminal ganglion neurons

Yi Zhang 1, Hong Xie 2, Gang Lei 3, Fen Li 3, Jianping Pan 3, Changjin Liu 3, Zhiguo Liu 4, Lieju Liu 4, Xuehong Cao 3, 4   

  1. 1 Department of Anesthesiology, Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
    2 Jingzhou Central Hospital, Jingzhou, Hubei Province, China
    3 Department of Physiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
    4 Department of Bioengineering, Wuhan Institute of Engineering, Wuhan, Hubei Province, China
  • Received:2014-03-21 Online:2014-04-25 Published:2014-04-25
  • Contact: Xuehong Cao, M.D., Ph.D., Department of Physiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China; Department of Bioengineering, Wuhan Institute of Engineering, Wuhan 430023, Hubei Province, China, caoxuehong@gmail.com. Lieju Liu, M.D.,Department of Bioengineering, Wuhan Institute of Engineering, Wuhan 430023, Hubei Province, China, liejuliu@gmail.com.
  • Supported by:

    This work was supported by NIH, grant No. GM-63577; NNSF, grant No. 30571537, No. 30271500; the National Natural Science Foundation of China, No. 30271500, 30571537 and 81370246. 2010 National Clinical Key Disciplines Construction Grant from the Ministry of Health of the People’s Republic of China.

摘要:

有人认为激动三叉神经节突触前神经元的大麻素1型受体可抑制电压依赖性钙通道,可降低细胞内钙内流,抑制神经递质释放;也有研究表明激动大麻素1型受体可增加细胞外钙内流,增加神经递质释放。那么大麻素调控钙离子浓度的具体机制是什么呢?鉴于此,实验采用全细胞膜片钳和钙成像技术,探讨内源性大麻素对大鼠三叉神经节神经元细胞内钙离子浓度的影响。结果发现,大麻素可直接激动电流,其在钳制电位为-60 mV时为内向,并剂量依赖性抑制高电压依赖性钙电流。说明大麻素增加细胞内钙离子浓度和抑制高电压依赖性钙电流是两个独立事件。蛋白激酶C信号通路参与了大麻素引起的电压依赖性钙通道抑制过程,蛋白激酶A,G信号通路参与了大麻素上调细胞内钙离子浓度的过程。结果证实大麻素对细胞内钙离子浓度的调控取决于大麻素直接引起的电流和抑制高电压依赖性钙电流的综合效应,此两个途径的受体机制类似,但信号通路不同。

关键词: 神经再生, 三叉神经节, 神经元, 内源性大麻素, 大麻素, 大麻素1型受体, 电压依赖性钙通道, 香草素受体, 膜片钳术, 钙, cAMP蛋白激酶, 蛋白激酶C, 国家自然科学基金

Key words: nerve regeneration, trigeminal ganglion, neurons, endocannabinoids, anandamide, cannabinoid receptor type 1, voltage-dependent calcium channels, vanilloid receptor, patch-clamp technique, calcium, cyclic adenosine monophosphate protein kinase, protein kinase C, NIH grant, neural regeneration