中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (32): 5151-5157.doi: 10.3969/j.issn.2095-4344.2864

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

电针脊髓损伤模型大鼠“足三里”与“伏兔”穴神经细胞凋亡因子Caspase-3的表达

魏卫兵1,周宾宾2,张鸿升3,杨  宇2,崔俊武2,李振兴2   

  1. 1柳州市中医医院,广西壮族自治区柳州市  545000;2广西中医药大学第一附属医院,广西壮族自治区南宁市  530000;3广西中医药大学附属瑞康医院,广西壮族自治区南宁市  530000
  • 收稿日期:2019-10-24 修回日期:2019-10-30 接受日期:2019-12-16 出版日期:2020-11-18 发布日期:2020-09-25
  • 通讯作者: 周宾宾,主任医师,广西中医药大学第一附属医院,广西壮族自治区南宁市 530000
  • 作者简介:魏卫兵,男,1989年生,江西省丰城市人,汉族,2019年广西中医药大学毕业,硕士,主要从事颈椎病的诊治与研究的工作。
  • 基金资助:
    国家自然科学基金(81660814);广西自然科学基金(2016JJA140159,2017JJA140554z)

Effect of Electroacupuncture at Zusanli and Futu acupoints on expression of apoptosis factor Caspase-3 in spinal cord injury rats

Wei Weibing1, Zhou Binbin2, Zhang Hongsheng3, Yang Yu2, Cui Junwu2, Li Zhenxing2   

  1. 1Liuzhou Hospital of Traditional Chinese Medicine, Liuzhou 545000, Guangxi Zhuang Autonomous Region, China; 2First Affiliated Hospital of Guangxi University of Chinese Medicine, Nanning 530000, Guangxi Zhuang Autonomous Region, China; 3Ruikang Hospital, Guangxi University of Chinese Medicine, Nanning 530000, Guangxi Zhuang Autonomous Region, China
  • Received:2019-10-24 Revised:2019-10-30 Accepted:2019-12-16 Online:2020-11-18 Published:2020-09-25
  • Contact: Zhou Binbin, Chief physician, First Affiliated Hospital of Guangxi University of Chinese Medicine, Nanning 530000, Guangxi Zhuang Autonomous Region, China
  • About author:Wei Weibing, Master, Liuzhou Hospital of Traditional Chinese Medicine, Liuzhou 545000, Guangxi Zhuang Autonomous Region, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81660814; the Natural Science Foundation of Guangxi, No. 2016JJA140159 and 2017JJA140554z

摘要:

文题释义:

caspase家族Caspases是近年来发现的一组存在于胞质溶胶中的结构上相关的半胱氨酸蛋白酶,它们的一个重要共同点是活性位点都含有半胱氨酸,并特异地断开天冬氨酸残基后的肽键,现已确定至少存在11caspase,参与细胞凋亡执行的则是caspase 3caspase 6caspase 7,其中caspase 37具有相近的底物和抑制剂特异性。

细胞凋亡是细胞的一种基本生物学现象,在多细胞生物去除不需要的或异常的细胞中起着必要的作用,凋亡是多基因严格控制的过程,当脊髓损伤发生时,Bcl-2家族、caspase家族等开始发生调控作用。

背景:中医自《内经》开始就提出了“治痿独取阳明”之理论,但是有关电针干预足阳明胃经治疗脊髓损伤的报道相对较少。

目的探讨电针刺激“足三里”“伏兔”穴对脊髓损伤大鼠受损节段Caspase-3表达的影响。

方法64SPFSD雌性大鼠随机分为4组,即对照组、预标记组、损伤后标记组和电针干预组,每组16只。对照组及预标记在操作前给予Brdu(50 mg/kg)连续10 d腹腔注射标记细胞,对照组于第11天给予咬除椎板,并不损伤脊髓,预标记组第11天给予制作脊髓损伤模型;损伤后标记组及电针组在制作脊髓损伤后连续10 d腹腔注射Brdu标记细胞,其中损伤后标记组不给予干预措施,电针组造模后第3天开始针刺足三里、伏兔穴。各组分别于损伤后3101724 d取脊髓组织,运用苏木精-伊红染色观察神经元数量的变化;免疫组织化学染色观察Brdu阳性细胞表达;qRT-PCR技术检测Caspase-3 mRNA的变化;Western blot检测Caspase-3蛋白表达的变化。实验方案经广西医科大学动物实验伦理委员会批准(批准号201712001)

结果与结论①脊髓损伤以后Caspase-3mRNA及蛋白表达均高于脊髓没有受到损伤的对照组,脊髓损伤后神经元的数量明显较对照组少;随着时间的推移,预标记组、损伤后标记组及电针干预组Caspase-3 mRNA及蛋白表达先升高后降低,而电针组的Caspase-3表达明显减少,与预标记组及损伤后标记组比较差异有显著性意义(P < 0.05)②苏木精-伊红染色显示随着时间的推移电针组的神经元数量明显比未经干预的预标记组、损伤后标记组高,在第24天时逐渐接近对照组的神经元数量;③免疫组织化学结果显示电针组阳性蛋白表达呈先升高后降低的趋势,17 d升至最高,24 d降至最低,整体阳性蛋白表达高于其他组(P < 0.05)④结果说明,电针刺激“足三里”“伏兔”穴可以减少Caspase-3 mRNA及蛋白表达,减少神经细胞的凋亡,同时可以促进神经元数量的增加,从而促进神经细胞的再生修复。

ORCID: 0000-0001-6069-4997(魏卫兵)

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: 脊髓损伤, 电针刺激, 足三里, 伏兔, Caspase-3, 大鼠, 实验

Abstract:

BACKGROUND: Traditional Chinese medicine has proposed the theory of “treatment for flaccidity aims at Yangming meridian” in the Internal Canon of Medicine. However, there have been relatively few reports on electroacupuncture at the stomach channel of Foot Yangming in the treatment of spinal cord injury.

OBJECTIVE: To investigate the effect of electroacupuncture stimulation of Zusanli and Futu on Caspase-3 expression in injured segments of spinal cord injury rats.

METHODS: Sixty-four Sprague-Dawley female rats, SPF grade, were randomly divided into four groups, i.e., control group, pre-labeling group, post-injury labeling group and electroacupuncture group, with 16 rats in each group. The control group and the pre-labeling group were intraperitoneally given Brdu (50 mg/kg) for 10 days before the operation. The control group was given a bite to remove the lamina on the 11th day, which did not damage the spinal cord. A model of spinal cord injury was made in the pre-labeling group on the 11th day. The post-injury labeling group and the electroacupuncture group were injected intraperitoneally with Brdu for 10 days after the spinal cord injury was made, and the post-injury labeling group was not treated. The electroacupuncture group started electroacupuncture at Zusanli and Futu acupoints on the 3rd day after the model was established. Spinal cord specimens were taken at 3, 10, 17, and 24 days after injury in each group, and the changes in the number of neurons were observed by hematoxylin-eosin staining. The expression of Brdu positive cells was observed by immunohistochemistry. The changes in Caspase-3 mRNA and protein expression were detected by qRT-PCR and western blot, respectively. The study protocol was approved by the Animal Ethic Committee of Guangxi Medical University, with an approval No. 201712001.

RESULTS AND CONCLUSION: The expression of Caspase-3 mRNA and protein after spinal cord injury was higher than that of the control group without spinal cord injury, and the number of neurons after spinal cord injury was significantly lower than that of the control group. With the passage of time, the mRNA and protein expression of Caspase-3 gene in the pre-labeling, post-injury labeling and electroacupuncture groups increased first and then decreased, while the Caspase-3 expression in the electroacupuncture group decreased significantly, which was significantly different from that in the pre-labeling and post-injury labeling groups (P < 0.05). Hematoxylin-eosin staining results showed that the number of neurons in the electroacupuncture group was significantly higher than that in pre-labeling and post-injury labeling groups, and gradually approached the number of neurons in the control group on the 24th day. Immunohistochemical results showed that the positive protein expression in the electroacupuncture group increased first and then decreased, reaching the highest on the 17th day and the lowest on the 24th day. The overall positive protein expression was significantly higher than that in the other groups (P < 0.05). To conclude, electroacupuncture stimulation of Zusanli and Futu acupoints can reduce the expression of Caspase-3 mRNA and protein, reduce the apoptosis of nerve cells, and promote the number of neurons, thus promoting the regeneration and repair of nerve cells.

Key words: spinal cord injury, electroacupuncture stimulation, Zusanli, Futu, Caspase-3, rat, experiment

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