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中华针灸电子杂志 ›› 2016, Vol. 05 ›› Issue (03) : 98 -103. doi: 10.3877/cma.j.issn.2095-3240.2016.03.003

论著

电针促进大鼠脑梗死灶周神经修复及功能恢复的实验研究
赵文栋1, 李常新1,(), 吴晓巍1, 王状状1, 李羚1   
  1. 1.030001 太原,山西医科大学第一医院神经内科
  • 收稿日期:2015-12-16 出版日期:2016-08-15
  • 通信作者: 李常新
  • 基金资助:
    山西医科大学科技创新基金(200904)

Experimental study of electroacupuncture to promote peripheral nerve repair and functional recovery in cerebral infarction in rats

Wendong Zhao1, Changxin Li1,(), Xiaowei Wu1, Zhuangzhuang Wang1, Ling Li1   

  1. 1.Department of Neurology,First Hospital of Shanxi Medical University,Taiyuan 030001,China
  • Received:2015-12-16 Published:2016-08-15
  • Corresponding author: Changxin Li
引用本文:

赵文栋, 李常新, 吴晓巍, 王状状, 李羚. 电针促进大鼠脑梗死灶周神经修复及功能恢复的实验研究[J/OL]. 中华针灸电子杂志, 2016, 05(03): 98-103.

Wendong Zhao, Changxin Li, Xiaowei Wu, Zhuangzhuang Wang, Ling Li. Experimental study of electroacupuncture to promote peripheral nerve repair and functional recovery in cerebral infarction in rats[J/OL]. Chinese Journal of Acupuncture and Moxibustion(Electronic Edition), 2016, 05(03): 98-103.

目的

研究电针对大鼠脑梗死后灶周神经修复和神经运动功能恢复的影响,并探讨其可能机制。

方法

选择2~3月龄、体重100~150 g健康雄性SD大鼠80只,复制易卒中肾性高血压(RHRSP)大鼠。待RHRSP模型制备10周后,取平均血压≥180 mmHg、体重400~450 g、无神经缺损症状大鼠,采用电凝法复制大脑中动脉闭塞(MCAO)模型。采用随机数字表法将RHRSP大鼠分为3组:假手术(SM)组24只、梗死(CI)组24只和电针(EA)组24只,其中CI组及EA组RHRSP大鼠经左侧颞部开颅,凝闭大脑中动脉复制MCAO模型。参照Garcia评分表对大鼠脑梗死后1 d、3 d、5 d和7d神经运动功能的变化进行评分;HE染色比较梗死灶体积及神经细胞病理改变;免疫组化观测各组在7 d、14 d、21 d和28 d时大鼠脑灶周巢蛋白(Nestin)、胶原纤维酸性蛋白(GFAP)、生长相关蛋白-43(GAP-43)阳性标记细胞数的变化,并采用单因素方差分析比较SM组、CI组和EA组之间上述指标的差异,进一步组间两两比较采用LSD-t检验。

结果

成功复制RHRSP大鼠75只,10周后MCAO模型成功复制48只;两组在3d、5d、7d比较,EA组Garcia评分明显高于CI组,且差异均有统计学意义(t=6.14、2.98、2.93,P均<0.05)。低倍镜下可见,EA组在7d、14 d、21 d时梗死体积较CI组缩小,且差异具有统计学意义(t=3.50、3.92、3.45,P均<0.05);其中EA组各个时间点梗死灶周Nestin阳性细胞计数比CI组增殖明显增加,且差异均有统计学意义(t=3.85、5.61、2.84、3.45,P均<0.05);7 d和14 d时EA组梗死灶周GAP-43阳性细胞数较CI组明显增加,且差异均有统计学意义(t=3.72、2.64,P均<0.05);而EA组7 d、21 d和28 d时梗死灶周GFAP阳性细胞计数明显低于CI组,且差异均有统计学意义(t=3.02、2.83、3.06,P均<0.05),尤其是7d时差异最显著。

结论

电针可上调神经干细胞的潜能,增强梗死灶周神经修复,促进神经功能的恢复。

Objective

To investigate the effect of electroacupuncture(EA)on nerve regeneration and motor function recovery of rats after cerebral infarction,and to explore its possible mechanism.

Methods

Eighty healthy male SD rats,2~3 months old,weighing 100~150 g,were included in this study.The rat model of stroke-prone renovascular hypertensive(RHRSP)was established.After 10 weeks of preparating RHRSP model,rats with averaging blood pressure≥180 mmHg,weighing 400~450 g,no neurological deficit symptoms were replication middle cerebral artery occlusion(MCAO)model using electrocoagulation.Digital randomization method was used to divided the rats into sham operation(SM)group,cerebral infarction(CI)group,and electroacupuncture(EA)group,24 rats for each group.The RHRSP rats in CI group and EA group were performed the left temporal craniotomy,and MCAO model was established.According to Garcia test,neurobehavioral score was assessed in 1 day,3 days,5 days and 7 days after cerebral infaction.The sizes of cerebral infarction and the number of neuronal and glial cells were compared between groups by HE staining.The positive cell numbers of Nestin,glial fibrillary acidic protein(GFAP),growth associated protein-43(GAP-43)were observed through immunohistochemistry staining between groups.Single factor variance analysis was used to compare the above data between groups.LSD-t test was used to analyze the data between two group.

Results

A total of 75 SHRSP rats were successfully established.After 10 weeks 48 MCAO model rats were successfully established.The neurological function score of Garciain was significantly higher in EA group than that in CI group,and the difference between the two groups was statistically significant in 3 days,5 days and 7 days groups(t=6.14,2.98 and 2.93,P<0.05).Under microscope,the sizes of infarct volume were significantly reduced in EA groups of 7 days,14 days,21 days than those of CI groups(t=3.50,3.92 and 3.45,P<0.05),but no significant difference was found in 28-day group.The positive cell count of Nestin was significantly increased in different time points of EA group than those of CI group(t=3.85,5.61,2.84 and 3.45,P<0.05).The positive cells of GAP-43 was significantly increased at 7 day and 14 days of EA group compared with those of CI group(t=3.72 and 2.64,P<0.05).The positive cells of GFAP was significantly lower in EA group than those of CI group at 7 days,21 days and 28 days(t=3.02,2.83,3.06,P<0.05),especially the 7-day group.

Conclusion

Electroacupuncture can regulate the proliferation of glial cells and neural stem cell potential,which can improve neurogenesis and promote the recovery of nerve function.

表1 3组大鼠各时间点Garcia评分比较(分,±s
表2 3组大鼠各时间点脑梗死灶体积比较(%,±s
表3 3组大鼠各时间点梗死灶周Nestin阳性细胞计数比较(个,±s
表4 3组大鼠各时间点梗死灶周GFAP阳性细胞计数比较(个,±s
表5 3组大鼠各时间点梗死灶周GAP-43阳性细胞计数比较(个,±s
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