吉林大学学报(医学版)

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眼针对MCAO/R大鼠大脑缺血区半暗带脑组织中BDNF和TrkB表达的影响及其脑保护作用机制

马贤德1,侯殿东2,张威3   

  1. 1.辽宁中医药大学教学实验中心,辽宁 沈阳 116600;2.辽宁中医药大学基础医学院,辽宁 沈阳 116600;3.辽宁中医药大学附属第一医院,辽宁 沈阳 116600
  • 收稿日期:2013-08-14 出版日期:2014-05-28 发布日期:2014-06-05
  • 通讯作者: 张威(Tel:024-31207186,E-mail:13504045746@163.com) E-mail:13504045746@163.com
  • 作者简介:马贤德(1979-),男,辽宁省朝阳县人,实验师,在读医学博士,主要从事中西医结合基础免疫学方面的研究。
  • 基金资助:

    国家科技部重点基础研究发展计划项目资助课题(2007CB512702);辽宁省沈阳市科技局科研基金资助课题(F11-264-1-66)

Influence of  eye acupuncture therapy in expressions of   BDNFand TrkB  in  corresponding penumbra brain tissue of ischemic area in rats with acute cerebral ischemia-reperfusion injury

MA Xian-de1,HOU Dian-dong2,ZHANG Wei3   

  1. 1.Experimental Teaching Center, Liaoning University of TCM, Shenyang 116600,China;2.College of Basic Mediccal Sciences,  Liaoning University of TCM, Shenyang 116600,China;3.First Affiliated Hospital,Liaoning University of TCM,Shenyang 116600,China
  • Received:2013-08-14 Online:2014-05-28 Published:2014-06-05

摘要:

目的:观察眼针对局灶性大脑中动脉缺血再灌注(MCAO/R)模型大鼠大脑缺血区半暗带脑组织中脑原性神经生长因子(BDNF)和酪氨酸激酶受体B(TrkB)表达水平的影响,探讨眼针对缺血性脑病的脑保护作用机制。方法:62只SD大鼠随机分为空白对照组(11只)、假手术组(11只)和模型复制组(40只)。模型复制组大鼠采用线栓法建立脑缺血再灌注模型,将模型复制成功的大鼠(32只)随机分为模型组(16只)及眼针组(16只);眼针组大鼠参照人体取穴方法,取肝区、上焦区、下焦区和肾区进行针刺干预。再灌注后2 h即开始针刺,每8 h 1次,连续针刺10次,末次干预后30 min,断髓处死大鼠,剥离缺血区域周围半暗带部位的脑组织,采用RT-PCR和Western blotting法检测大鼠脑组织中BDNF和TrkB mRNA及蛋白表达水平。结果:与空白对照组比较,假手术组大鼠半暗带脑组织中BDNF和TrkB mRNA和蛋白表达水平均无明显变化(P>0.05);与假手术组比较,模型组大鼠半暗带脑组织中BDNF和TrkB mRNA和蛋白表达水平均升高(P<0.01);与模型组比较,眼针组MCAO/R模型大鼠半暗带脑组织中BDNF和TrkB mRNA和蛋白表达水平上升(P<0.05或P<0.01)。结论:脑缺血再灌注损伤发生后可促进BDNF及其受体TrkB表达以对抗损伤。眼针可通过上调BDNF及其受体TrkB表达水平实现其脑保护作用。

关键词:  , 眼针, 脑缺血再灌注, 脑源性神经生长因子, 酪氨酸激酶受体B

Abstract:

Abstract:Objective
To investigate the influence of the eye acupuncture therapy in the expressions of brain derived neurophic factor(BDNF) and tyrosine kinase receptor B(TrkB)  in penumbra brain tissue of ischemic area in the rats with acute cerebral ischemia reperfusion injury, and to explore the related mechanism of protective effect on brain of eye acupunture.Methods 62 SD rats were randomly divided into blank control group (n=11),sham operation group (n=11) and model copy  group (n=40). The rats in copy model group were used to establish models with suture method,and the  successful model    rats (n=32)  were randomly divided into model group(n=16)and eye acupuncture group(n=16).The rats in eye acupuncture group were treated with eye acupuncture intervention;the acupoints were chosen according to human acupoint selection method,the liver,the upper-jiao,the down-jiao district,and renal were selected for acupuncture intervention.After reperfusion for 2 h, the acupuncture was performed once every 8 h,lasted for  10 times;30 min after the last intervention,the rats were sacrificed;the regional ischemia penumbra around the parts of the brain tissue was obtained and the expressions of BDNF and TrkB mRNA and protein  in brain tissue of the rats were detected with RT-PCR and Western blotting method.Results Compared with  blank control group,the expression levels of BDNF and TrkB mRNA and protein  in brain tissue of the rats in sham operation group had no statistical significance(P>0.05);compared with  sham operation group,the expression levels of BDNF and TrkB mRNA and protein  in brain tissue of the rats in model group were significantly up-regulated(P<0.01);compared with  model group,the expression levels of BDNF and TrkB mRNA and protein  in brain tissue of the rats in eye acupuncture group were significantly up-regulated(P<0.05 or P<0.01).Conclusion The expressions of BDNF and TrkB are increased after cerebral ischemia and reperfusion injury.Eye acupuncture can protect the brain of MCAO/R rats,which may be related to the up-regulation of the expressions of BDNF and TrkB in the corresponding penumbra.

Key words: eye acupuncture, cerebral ischemia-reperfusion, brain-derived neurotrophic factor, tyrosine kinase receptor B

中图分类号: 

  • R245