中国临床解剖学杂志 ›› 2014, Vol. 32 ›› Issue (4): 455-457.doi: 10.13418/j.issn.1001-165x.2014.04.020

• 实验研究 • 上一篇    下一篇

右美托咪定对大鼠神经元缺氧无糖损伤保护作用的实验研究

李红英, 张建杏, 王研, 于卫, 周国斌   

  1. 广东省人民医院(广东省医学科学院)麻醉科,  广州   510080
  • 收稿日期:2014-04-20 出版日期:2014-07-25 发布日期:2014-08-07
  • 通讯作者: 张建杏,主治医师, E-mail:shengyizys@yeah.net E-mail:shengyilys@yeah.net
  • 作者简介:李红英(1967-),广东博罗人,硕士,副主任医师,主要从事临床麻醉研究
  • 基金资助:

    广东省科技计划项目(2010B031600252,2011B0318 00149)

Protection and mechanism of dexmedetomidine preconditioning against neuronal injury related to oxygen-glucose deprivation

LI Hong-ying, ZHANG Jian-xing, WANG Yan, YU Wei,  ZHOU Guo-bin   

  1. Department of Anesthesiology, Guangdong General Hospital (Guangdong Academy of Medical Sciences), Guangzhou 510080, China
  • Received:2014-04-20 Online:2014-07-25 Published:2014-08-07

摘要:

目的 研究a2肾上腺素受体激动剂右美托咪定(dexmedetomidine,DEX)对原代培养的大鼠皮层神经元缺氧无糖损伤(OGD)的保护作用并探讨其机制。  方法 建立原代培养的大鼠皮层神经元缺氧无糖损伤(OGD)模型,通过采用MTT、LDH等方法观察右美托咪定对于神经元缺氧无糖损伤的保护作用,Western blot 检测p38MAPK蛋白表达的变化。  结果 右美托咪定对于缺氧无糖(OGD)损伤处理的神经元具有明显保护效果。右美托咪定预处理显著降低OGD损伤神经元中的磷酸化p38MAPK蛋白表达, p38MAPK抑制剂SB203580能模拟DEX的神经保护作用,使细胞存活率升高。  结论 右美托咪定预处理对于大鼠原代皮层神经元OGD损伤具有明显的保护效果。其机制可能与通过降低磷酸化p38MAPK表达有关。

关键词: 右美托咪定, OGD损伤, 皮层神经元, 大鼠

Abstract:

Objective To study the protection and mechanism of dexmedetomidine preconditioning against neuronal injury related to oxygen–glucose deprivation(OGD). Methods Cortical neurons from the embryonic day 16~18 rats were cultured. With mimicking a cerebral ischemia in vitro, OGD was performed in the pretreated cells. Neuron injury was assessed by MTT. Protein expression of p-p38 was examined by Western blot. Results Dexmedetomidine preconditioning protected the dose-dependent cortical neurons from OGD injury. Conclusions Dexmedetomidine preconditioning protects the cortical neuron from OGD injury; inhibition of p38MAPK pathway maybe one of the mechanisms responsible for this effect.

Key words: Dexmedetomidine, Oxygen-glucose deprivation, Cortical neurons, Rats

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