中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (5): 701-706.doi: 10.3969/j.issn.2095-4344.3002

• 脊柱组织构建 spinal tissue construction • 上一篇    下一篇

雷公藤内酯醇改善大鼠脊髓损伤后的运动障碍

马斌祥1,何万庆1,周广超2,关永林1   

  1. 1甘肃省中医院脊柱骨三科,甘肃省兰州市   730050;2甘肃中医药大学,甘肃省兰州市   730030
  • 收稿日期:2020-02-11 修回日期:2020-02-21 接受日期:2020-03-18 出版日期:2021-02-18 发布日期:2020-11-28
  • 通讯作者: 关永林,博士,主任医师,甘肃省中医院脊柱骨三科,甘肃省兰州市 730050
  • 作者简介:马斌祥,男,1983年生,硕士,汉族,主治医师,主要从事脊柱疾病的预防与治疗研究。

Triptolide improves motor dysfunction in rats following spinal cord injury

Ma Binxiang1, He Wanqing1, Zhou Guangchao2, Guan Yonglin1   

  1. 1Department of Spinal Orthopedics, Gansu Provincial Hospital of TCM, Lanzhou 730050, Gansu Province, China; 2Gansu University of Chinese Medicine, Lanzhou 730050, Gansu Province, China
  • Received:2020-02-11 Revised:2020-02-21 Accepted:2020-03-18 Online:2021-02-18 Published:2020-11-28
  • Contact: Guang Yonglin, MD, Chief physician, Department of Spinal Orthopedics, Gansu Provincial Hospital of TCM, Lanzhou 730050, Gansu Province, China
  • About author:Ma Binxiang, Master, Attending physician, Department of Spinal Orthopedics, Gansu Provincial Hospital of TCM, Lanzhou 730050, Gansu Province, China

摘要:

文题释义:
酪氨酸蛋白激酶/信号传导和转录激活子信号转导通路:是Ras通路之后出现的又一重要细胞因子信号传导通路。该通路广泛参与多种细胞因子和生长因子信号转导的共同通路,在细胞的增殖分化凋亡以及免疫调节等过程中发挥着重要的作用,目前主要研究集中在免疫系统及肿瘤等相关疾病。
雷公藤内酯醇:是中药雷公藤的主要有效成分之一,据报道其具有抗炎、抗氧化、自由基清除和神经保护的作用。

背景:继发性脊髓损伤致残率高的主要诱因之一是氧化应激和炎症反应,如何抑制脊髓继发性损伤是目前研究的热点。
目的:探讨雷公藤内酯醇对大鼠脊髓损伤后运动功能障碍的改善作用及其可能机制。
方法:将48只健康雄性SD大鼠随机分为假手术组、脊髓损伤组和雷公藤内酯醇组,每组16只。采用改良的Allen法建立大鼠脊髓损伤模型。雷公藤内酯醇组大鼠行脊髓损伤30 min后腹腔注射雷公藤内酯醇[0.1 mg/(kg·d)],假手术组及脊髓损伤组均经相同途径给予等量含体积分数1%二甲亚砜的生理盐水,连续治疗10 d,假手术组仅行椎板切除不损伤脊髓。于术后第7,14,21,28,35天采用脊髓损伤的行为学评分法评定各组SD大鼠后肢运动功能;于术后第10天收集大鼠的胸脊髓(T8-11),用于组织学检测和蛋白质印迹、实时定量聚合酶链式反应分析。
结果与结论:①脊髓损伤组和雷公藤内酯醇组的脊髓损伤的行为学评分随着伤后天数的增加而增加,且雷公藤内酯醇组在受伤后第14,21,28,35天的行为学评分均显著高于脊髓损伤组(P < 0.05);②术后10 d切取各组大鼠的胸脊髓(T8-11)组织经苏木精-伊红染色发现,脊髓损伤组大鼠胸脊髓核心区纵切面显示严重水肿、出血和炎性细胞浸润,而这些异常现象均可被雷公藤内酯醇治疗明显减弱(P < 0.05);③RT-PCR检测发现,与脊髓损伤组相比,雷公藤内酯醇组大鼠脊髓中肿瘤坏死因子α,p-STAT3和p-JAK2 mRNA表达显著降低(P < 0.05),且超氧化物歧化酶和过氧化氢酶的mRNA表达水平明显升高(P < 0.05);④结果证实,脊髓损伤后腹腔注射雷公藤内酯醇可适度改善运动功能障碍,其作用机制可能与雷公藤内酯醇调控JAK/STAT信号通路的异常活化有关。
https://orcid.org/0000-0002-9233-8302 (马斌祥) 

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 脊髓, 脊髓损伤, 雷公藤内酯醇, 运动障碍, 抗氧化, 炎症, 实验, 动物, 因子

Abstract: BACKGROUND: One of the main causes of high disability rate of secondary spinal cord injury is oxidative stress and inflammatory response. How to suppress secondary spinal cord injury is a hot topic of current research. 
OBJECTIVE: To explore the improvement effect of triptolide on motor dysfunction after spinal cord injury and its possible mechanism.
METHODS: Forty-eight healthy male Sprague-Dawley rats were randomly divided into sham operation group, spinal cord injury group and triptolide group, 16 rats in each group. The modified Allen method was used to establish the rat spinal cord injury model. Rats in the triptolide group received intraperitoneal injection of triptolide (0.1 mg/kg per day) 30 minutes after spinal cord injury. Both the sham operation group and spinal cord injury group were given the same amount of normal saline containing 1% dimethyl sulfoxide via the same route for 10 consecutive days. The sham operation group only underwent laminectomy without damaging spinal cord. Basso-Beattie-Bresnahan scoring method was used to evaluate hindlimb function of Sprague-Dawley rats at 7, 14, 21, 28, and 35 days after surgery. The thoracic spinal cord (T8-11) of the rats was collected on the 10th day after surgery for histological detection, western blot, and real-time quantitative PCR analysis.  
RESULTS AND CONCLUSION: The behavioral scores in the spinal cord injury group and triptolide group increased with increasing days from injury, and the behavioral scores in the triptolide group were significantly higher than that in the spinal cord injury group at 14, 21, 28, and 35 days after surgery (P < 0.05). Hematoxylin-eosin staining results of the T8-11 sections at 10 days after surgery revealed severe edema, bleeding, and inflammatory cell infiltration in the longitudinal section of the thoracic spinal cord core area of the spinal cord injury group, and these abnormalities could be significantly reduced by triptolide treatment (P < 0.05). RT-PCR results showed that compared with the spinal cord injury group, the expression levels of tumor necrosis factor-α, p-STAT3 and p-JAK2 mRNAs in the spinal cord was significantly decreased (P < 0.05), and the levels of superoxide dismutase and catalase mRNAs were significantly increased in the triptolide group (P < 0.05). Findings from this study confirm that intraperitoneal injection of triptolide can moderately improve motor dysfunction after spinal cord injury. Its mechanism may be related to the abnormal activation of JAK/STAT signaling pathway regulated by triptolide.

Key words: spinal cord, spinal cord injury, triptolide, dyskinesia, antioxidation, inflammation, experiment, animal, factor

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