中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (26): 4169-4175.doi: 10.3969/j.issn.2095-4344.2764

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

电针刺激脊髓损伤大鼠足阳明胃经脊髓受损节段Bax、Bcl-2的mRNA和蛋白的表达

 1,许  1,周宾宾2,魏卫兵3,王  1,严潮浪1    

  1. 1江西中医药大学附属医院,江西省南昌市  3300002广西中医药大学第一附属医院,广西壮族自治区南宁市  5300003柳州市中医医院,广西壮族自治区柳州市  545000

  • 收稿日期:2019-09-05 修回日期:2019-09-07 接受日期:2019-10-19 出版日期:2020-09-18 发布日期:2020-09-01
  • 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:吴凡,男,1991年生,江西省樟树市人,汉族,2016年江西中医药大学毕业,硕士,主治医师,主要从事中西结合预防和治疗骨与关节损伤。 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,医师,主要从事颈椎病的诊治与研究。
  • 基金资助:

    国家自然科学基金(81660814)

Electroacupuncture stimulation of Foot-Yangming Stomach Meridian regulates mRNA and protein expression of Bax and Bcl-2 in spinal cord injury rats

Wu Fan1, Xu Quan1, Zhou Binbin2, Wei Weibing3, Wang Zhu1, Yan Chaolang1   

  1. 1Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang 330000, Jiangxi Province, China; 2First Affiliated Hospital of Guangxi University of Traditional Chinese Medicine, Nanning 530000, Guangxi Zhuang Autonomous Region, China; 3Liuzhou Traditional Chinese Medicine Hospital, Liuzhou 545000, Guangxi Zhuang Autonomous Region, China

  • Received:2019-09-05 Revised:2019-09-07 Accepted:2019-10-19 Online:2020-09-18 Published:2020-09-01
  • Contact: Zhou Binbin, Chief physician, First Affiliated Hospital of Guangxi University of Traditional Chinese Medicine, Nanning 530000, Guangxi Zhuang
  • About author:Wu Fan, Master, Attending physician, Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang 330000, Jiangxi Province, China Wei Weibing, Master, Physician, Liuzhou Traditional Chinese Medicine Hospital, Liuzhou 545000, Guangxi Zhuang Autonomous Region, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81660814

摘要:

文题释义:

脊髓损伤大鼠模型:用于研究脊髓损伤而制作的大鼠模型,良好的动物模型是实验成功的重要基础,经过不断的研究发展,其造模方法也多种多样,包括钳夹法、打击法、半横切法、完全横切法等,各种方法在稳定性及死亡率方面各有优劣,研究者应当根据自身需求选择合适的造模方式。

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,该课题研究从细胞凋亡因子BaxBcl-2的角度出发,初步探讨电针干预足阳明胃经对脊髓损伤神经修复的相关机制。

目的探讨电针刺激足阳明胃经对脊髓损伤大鼠受损节段BaxBcl-2表达的影响。

方法64SPFSD雌性大鼠随机分为4组:对照组、预标记组、损伤后标记组和电针组,每组16只。对照组及预标记组在操作前给予Brdu(5 mg/kg)连续10 d腹腔注射,以标记脊髓内保持分化活力的细胞,对照组于第11天行T10节段椎板切除,预标记组于第11天采用钳夹法造成脊髓损伤缺血模型;损伤后标记组、电针组在制作脊髓损伤模型后连续10 d腹腔注射Brdu(5 mg/kg)标记损伤后活化增殖的细胞,电针组于造模后第3天开始电针干预足阳明胃经足三里、伏兔穴,每周5次。造模后3101724 d(电针071421 d),每个时间点取4只大鼠,采用BBB评分评估运动功能恢复情况,qRT-PCRWestern blot检测脊髓组织BaxBcl-2 mRNA及蛋白的表达。

结果与结论:①术后3-24 d时,预标记组、损伤后标记组、电针组大鼠神经功能评分低于对照组,差异均有显著性意义(P < 0.05),电针组神经功能评分高于预标记组、损伤后标记组,差异均有显著性意义(P < 0.05);②随着脊髓损伤时间的延长,Bax mRNA及蛋白表达先升高后降低,Bcl-2 mRNA及蛋白表达先降低后升高,Bax/Bcl-2比值随着电针干预时间的推移逐渐减少;③结果表明,电针刺激足阳明胃经可以通过调节Bcl-2、Bax的表达减少神经细胞凋亡,促进脊髓损伤大鼠运动功能的恢复。

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, 电针干预, 足阳明胃经, Bax, Bcl-2

Abstract:

BACKGROUND: Traditional Chinese medicine has proposed the theory that “treatment for flaccidity aims at Yangming meridian” in the Internal Canon of Medicine. However, relatively few reports focus on electroacupuncture at the Stomach Meridian of Foot-Yangming for the treatment of spinal cord injury. From the perspectives of Bcl-2 and Bcl-2 expression, the mechanism of electroacupuncture intervention at the Stomach Meridian of Foot-Yangming for the treatment of spinal cord injury was preliminarily explored in this study.

OBJECTIVE: To investigate the effect of electroacupuncture on the expression of Bax and Bcl-2 in injured segments of spinal cord injury rats.

METHODS: Sixty-four Sprague-Dawley female rats (SPF level) were randomly divided into four groups: 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 given intraperitoneal injection of Brdu (5 mg/kg) for 10 continuous days prior to the operation to label the cells that had differentiation ability and vitality in the spinal cord. The control group underwent laminectomy at T10 segment on the 11th day of labeling, while a model of spinal cord injury was induced by the clamp method in the pre-labeling group. The post-injury labeling group and the electroacupuncture group were injected intraperitoneally with BrdU (5 mg/kg) for 10 continuous days to mark the activated and proliferated cells. In the electroacupuncture group, electroacupuncture stimulation was done at Zusanli and Futu acupoints of Foot-Yangming Stomach Meridian on the 3rd day after modeling, 5 times a week. Four rats were taken from each group at 3, 10, 17, and 24 days after modeling (0, 7, 14, and 21 days after electroacupuncture stimulation). Basso, Beattie and Bresnahan scores were used to evaluate the motor function, and the expressions of Bax and Bcl-2 protein and gene in the spinal cord were detected using qRT-PCR and western blot.

RESULTS AND CONCLUSION: At 3-24 days after surgery, the neurological scores in the pre-labeling group, post-injury labeling group, and electroacupuncture group were significantly lower than those in the control group (P < 0.05). The neurological scores of the electroacpuncture group were significantly higher than those in the pre-labeling group and post-injury labeling group (P < 0.05). With the prolongation of spinal cord injury time, the mRNA and protein expressions of Bax increased first and then decreased, while the mRNA and protein expression of Bcl-2 decreased first and then increased. The ratio of Bax/Bcl-2 decreased gradually with the lapse of electroacupuncture intervention time. To conclude, electroacupuncture stimulation of the Stomach Meridian of Foot-Yangming can reduce apoptosis of nerve cells, and promote recovery of motor function in spinal cord injury rats by regulating the expression of Bcl-2 and Bax. 

Key words: spinal cord injury, electroacupuncture intervention, Stomach Meridian of Foot-Yangming, Bax, Bcl-2

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