中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (31): 4981-4987.doi: 10.12307/2021.140

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

体外放散式冲击波促进脑梗死大鼠海马区神经干细胞增殖并抑制miR-124的表达

李  杰,马跃文,康  楠,张  静,张  瑜   

  1. 中国医科大学附属第一医院康复医学科,辽宁省沈阳市  110001
  • 收稿日期:2020-04-24 修回日期:2020-04-28 接受日期:2020-06-29 出版日期:2021-11-08 发布日期:2021-04-25
  • 通讯作者: 马跃文,博士,教授,主任医师,中国医科大学附属第一医院康复医学科,辽宁省沈阳市 110001
  • 作者简介:李杰,男,1995年生,河北省张家口市人,汉族,2020年中国医科大学毕业,硕士,主要从事神经康复方向研究。
  • 基金资助:
    辽宁省重点研发计划指导计划项目(2017225013),项目负责人:马跃文;沈阳市科技计划项目(19-112-4-064),项目负责人:马跃文

Radial extracorporeal shock wave therapy promotes the proliferation of neural stem cells in hippocampus of cerebral infarction rats and inhibits miR-124 expression

Li Jie, Ma Yuewen, Kang Nan, Zhang Jing, Zhang Yu   

  1. Department of Rehabilitation Medicine, the First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China 
  • Received:2020-04-24 Revised:2020-04-28 Accepted:2020-06-29 Online:2021-11-08 Published:2021-04-25
  • Contact: Ma Yuewen, MD, Professor, Chief physician, Department of Rehabilitation Medicine, the First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China
  • About author:Li Jie, Master, Department of Rehabilitation Medicine, the First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China
  • Supported by:
    the Liaoning Provincial Key R & D Program Guidance Project, No. 2017225013 (to MYW); Shenyang Science and Technology Plan Project, No. 19-112-4-064 (to MYW)

摘要:

文题释义

体外放散式冲击波疗法:该研究采用的气压弹道放散式冲击波是一种利用压缩空气使得射弹撞击治疗传导头的机械性脉冲波,在肌肉骨骼疾病中已广泛应用,近年来也发现其对多种干细胞增殖、分化具有促进作用。
大脑中动脉栓塞模型:线栓法用于制作局灶性脑缺血模型的实验研究,其基本原理是用线栓阻闭大脑中动脉起始部,造成大脑中动脉供血区缺血,从而使大鼠发生局灶性脑缺血。此方法的特点是稳定性好、重复性好、损伤小、梗死部位确切和成功率高。
背景:miR-124在神经干细胞的增殖中发挥重要作用,并且脑梗死后在脑组织及血液中的表达发生变化,提示其是脑梗死后内源性神经再生的核心调控因子之一。体外放散式冲击波可以促进神经干细胞增殖,但是否与miR-124有关目前尚不明确。
目的:探讨体外放散式冲击波对脑梗死后海马区miR-124表达的影响及其促进神经干细胞的增殖是否与miR-124有关。
方法:建立大鼠大脑中动脉栓塞模型,脑梗死大鼠随机分为体外放散式冲击波组与对照组。体外放散式冲击波组在脑梗死后72 h干预缺血侧头部,每3 d 干预1次,于造模成功后的11,20,29,38 d进行大鼠神经功能评分;采用RT-qPCR法检测脑梗死大鼠患侧海马miR-124与Nestin mRNA的表达;Western blot和免疫荧光技术检测患侧海马Nestin蛋白的表达。
结果与结论:①大鼠脑梗死后,患侧海马miR-124表达逐渐增加;②大脑中动脉栓塞后11,20,29,38 d,体外放散式冲击波组大鼠改良神经功能缺损评分均低于对照组(P < 0.05),患侧海马Nestin表达均高于对照组(P < 0.05);③大脑中动脉栓塞后11,20,29 d,体外放散式冲击波组脑梗死大鼠患侧海马miR-124表达低于对照组(P < 0.05);④结果表明,脑梗死大鼠患侧海马miR-124表达增高,冲击波直接干预脑梗死大鼠患侧头部可降低miR-124表达,促进神经干细胞数目增多,改善受损神经功能。
https://orcid.org/0000-0003-4232-5957(马跃文) 

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 干细胞, 神经干细胞, 体外放散式冲击波, miR-124, 微小RNA, 脑缺血, 脑梗死, 大脑中动脉栓塞, 大鼠

Abstract: BACKGROUND: miR-124 plays an important role in the proliferation of neural stem cells and changes in brain tissue and blood expression after cerebral infarction, suggesting that it is one of the core regulators of endogenous nerve regeneration after cerebral infarction. Radial extracorporeal shock wave therapy can promote neural stem cell proliferation, but whether it is related to miR-124 is currently unclear. 
OBJECTIVE: To investigate the effect of radial extracorporeal shock wave therapy on the expression of miR-124 in the hippocampus after cerebral infarction and whether the promotion of neural stem cell proliferation is related to miR-124.
METHODS:  A model of middle cerebral artery occlusion in rats was established. Rats were randomly divided into radial extracorporeal shock wave group and control group. The radial extracorporeal shock wave group was subjected to radial extracorporeal shock wave therapy intervention, with the ischemic head 72 hours after the cerebral infarction, once every 3 days. At 11, 20, 29, and 38 days after model establishment, modified neurological function scores were assessed in rats. Then RT-qPCR was used to detect the expressions of miR-124 and Nestin mRNA in the hippocampus of cerebral infarction rats. Western blot assay and immunofluorescence were used to detect the expression of Nestin protein in the hippocampus of the ischemic side.   
RESULTS AND CONCLUSION: (1) After cerebral infarction in rats, the expression of miR-124 gradually increased in the hippocampus of the ischemic side. (2) At 11, 20, 29, and 38 days after middle cerebral artery occlusion, the neurological scores of the rats were lower in the radial extracorporeal shock wave group than those in the control group (P < 0.05). The expression of Nestin was higher on the ischemic side of the hippocampus than that in the control group (P < 0.05). (3) At 11, 20 and 29 days after middle cerebral artery occlusion, the expression of miR-124 in hippocampus of cerebral infarction rats on the affected side in the radial extracorporeal shock wave group was lower than that of the control group (P < 0.05). (4) Results suggest that expression of miR-124 in the hippocampus of cerebral infarction rats is increased. Radial extracorporeal shock wave therapy directly interfering with the head of the affected side can reduce the expression of miR-124, increase the number of neural stem cells, and improve impaired nerve function. 

Key words: stem cells, neural stem cells, radial extracorporeal shock wave therapy, miR-124, microRNAs, cerebral ischemia, cerebral infarction, middle cerebral artery occlusion, rats 

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