解剖学报 ›› 2019, Vol. 50 ›› Issue (5): 549-553.doi: 10.16098/j.issn.0529-1356.2019.05.001

• 神经生物学 •    下一篇

大鼠背根神经节中的Nogo-A蛋白促进微管聚合和炎症热痛觉敏化的发生

胡启国 刘怀存 陈玲 赵妍 王君*    

  1. 北京大学基础医学院人体解剖学与组织学胚胎学系,北京 100083 
  • 收稿日期:2019-03-26 修回日期:2019-04-22 出版日期:2019-10-06 发布日期:2019-12-10
  • 通讯作者: 王君 E-mail:wangjun74008@bjmu.edu.cn
  • 基金资助:
    北京市自然科学基金面上项目

Nogo-A in the rat dorsal root ganglion promotes the polymerization of tubulin and inflammatory heat hyperalgesia

HU Qi-guo LIU Huai-cun CHEN Ling ZHAO Yan WANG Jun*   

  1. Department of Anatomy and Histology and Embryology, Peking University School of Basic Medical Sciences, Beijing 100083,China
  • Received:2019-03-26 Revised:2019-04-22 Online:2019-10-06 Published:2019-12-10
  • Contact: WANG Jun E-mail:wangjun74008@bjmu.edu.cn

摘要:

目的 探讨背根神经节(DRG)神经元中的Nogo-A在炎症性热痛觉敏化过程中对微管的调控作用及其下游分子通路。 方法 对野生型大鼠(n=12)和Nogo-A敲除大鼠(n=14)足底注射完全弗式佐剂(CFA)制造炎症痛大鼠模型,取两组大鼠DRG组织,采用Western blotting、免疫荧光染色等方法,研究DRG中Nogo-A在炎症热痛觉敏化过程中对于微管的调节作用。 结果 Nogo-A基因敲除具有缓解CFA诱导的炎症性热痛觉敏化作用,Nogo-A基因敲除大鼠DRG中的微管聚合减少,微管上游信号分子磷酸化脑衰反应调节蛋白2(p-CRMP2)表达增加。 结论 Nogo-A通过增强CRMP2促进微管聚合,促进了炎症热痛觉敏化的发生。

关键词: Nogo-A, 微管, 脑衰反应调节蛋白2, 背根神经节, 炎症痛, 免疫印迹法, 大鼠

Abstract:

Objective To investigate the regulation of microtubules by Nogo-A in the dorsal root ganglia during the inflammatory pain. Methods The ipsilateral paw withdrawal latency(PWL)was measured in wild type rats(WT,n=12) and Nogo-A konck-out (Nogo-A KO) rats (n=14) after complete Freunds adjuvant (CFA) injection. Western blotting and immunofluorescent staining were used to study the expression of microtubules and phosphorylated collapsin response mediator protein 2(p-CRMP2)in the dorsal root ganglion (DRG) of both groups. Results Knock out of Nogo-A in rats had attenuated the CFA-induced inflammatory hyperalgesia. The acetylated tubulin was reduced, and the expression of p-CRMP2 was increased in the DRG of the Nogo-A KO rats. Conclusion Nogo-A is involved in the regulation of inflammatory heat hyperalgesia by promoting the microtubule polymerization via CRMP2 pathway.

Key words: Nogo-A, Microtubule, Collapsin response mediator protein-2, Dorsal root ganglion, Inflammatory pain, Western blotting, Rat