中国神经再生研究(英文版) ›› 2017, Vol. 12 ›› Issue (1): 125-132.doi: 10.4103/1673-5374.199004

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

异丙酚可保护缺血再灌注损伤脊髓血-脊髓屏障的完整性

  

  • 收稿日期:2016-11-21 出版日期:2017-01-15 发布日期:2017-01-15
  • 基金资助:

    湖北省自然科学基金项目(2013CFB086),华中科技大学基础研究项目(2016YXZDO24),湖北省卫生与人口计划生育委员会科研项目(WJ2015MB023)

Propofol protects against blood-spinal cord barrier disruption induced by ischemia/reperfusion injury

Li-jie Xie1, Jin-xiu Huang1, Jian Yang1, Fen Yuan1, Shuang-shuang Zhang1, Qi-jing Yu2, Ji Hu1   

  1. 1 Department of Anesthesiology, Liyuan Hospital of Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei Province, China; 
    2 Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
  • Received:2016-11-21 Online:2017-01-15 Published:2017-01-15
  • Contact: Ji Hu M.D., hbwhly01@163.com.
  • Supported by:

    supported by the Natural Science Foundation of Hubei Province, No. 2013CFB086; a grant from the Basic Research Funds of the Huazhong University of Science & Technology, No. 2016YXZDO24;and a grant from the Scientific Research project of the Health and Family Planning Commission of Hubei Province, No. WJ2015MB023.

摘要:

 

丙泊酚对损伤脊髓有保护作用,但研究显示其对缺血再灌注损伤脊髓血-脊髓屏障的影响所知较少。因此,实验设计探讨了此问题。首先阻断兔肾下腹主动脉30min诱导构建脊髓缺血再灌注损伤模型,分别在主动脉阻断前10min和再灌注后即刻静脉注射30mg/kg异丙酚。再灌注48h后,见兔脊髓病理损伤明显减轻,血-脊髓屏障通透性降低,损伤脊髓中基质金属蛋白酶9和NF-κB蛋白及mRNA表达降低,而紧密连接蛋白occludin和claudin-5蛋白表达增加。结果显示异丙酚能在脊髓缺血再灌注损伤后通过抑制核因子κB信号通路,影响基质金属蛋白酶9及紧密连接蛋白的表达,以达到维持血-脊髓屏障完整性的作用。

ORCID:00000-0003-1175-752X(Ji Hu)

Abstract:

 

Propofol has been shown to exert neuroprotective effects on the injured spinal cord. However, the effect of propofol on the blood–spinal cord barrier (BSCB) after ischemia/reperfusion injury (IRI) is poorly understood. Therefore, we investigated whether propofol could maintain the integrity of the BSCB. Spinal cord ischemia/reperfusion injury (SCIRI) was induced in rabbits by infrarenal aortic occlusion for 30 minutes.Propofol, 30 mg/kg, was intravenously infused 10 minutes before aortic clamping as well as at the onset of reperfusion. Then, 48 hours later, we performed histological and mRNA/protein analyses of the spinal cord. Propofol decreased histological damage to the spinal cord, attenuated the reduction in BSCB permeability, downregulated the mRNA and protein expression levels of matrix metalloprotease-9 (MMP-9) and nuclear factor-κB (NF-κB), and upregulated the protein expression levels of occludin and claudin-5. Our findings suggest that propofol helps maintain BSCB integrity after SCIRI by reducing MMP-9 expression, by inhibiting the NF-κB signaling pathway, and by maintaining expression of tight junction proteins.

Key words: nerve regeneration, spinal cord ischemia reperfusion injury, blood–spinal cord barrier, propofol, matrix metalloprotease-9, nuclear factor-κB, tight junction proteins, neural regeneration