中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (14): 2205-2210.doi: 10.3969/j.issn.2095-4344.3511

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

电针干预放射性脑损伤小鼠海马区突触可塑性相关蛋白的表达

王冬慧1,武  鑫1,孙宁宁1,张  晗1,高剑峰2   

  1. 河南中医药大学,1基础医学院,2研究生院,河南省郑州市    450046
  • 收稿日期:2020-07-13 修回日期:2020-07-15 接受日期:2020-08-19 出版日期:2021-05-18 发布日期:2020-12-30
  • 通讯作者: 高剑峰,教授,硕士生导师,河南中医药大学研究生院,河南省郑州市 450046
  • 作者简介:王冬慧,女,1994年生,河南中医药大学在读硕士,主要从事中枢性脑损伤的防治研究。
  • 基金资助:
    国家自然科学基金项目(81373852),项目负责人:高剑峰

Electroacupuncture intervention on the expression of synaptic plasticity-related proteins in the hippocampi of mice with radiation-induced brain injury

Wang Donghui1, Wu Xin1, Sun Ningning1, Zhang Han1, Gao Jianfeng2   

  1. 1School of Basic Medicine, Henan University of Traditional Chinese Medicine, Zhengzhou 450046, Henan Province, China; 2Graduate School of Henan University of Traditional Chinese Medicine, Zhengzhou 450046, Henan Province, China 
  • Received:2020-07-13 Revised:2020-07-15 Accepted:2020-08-19 Online:2021-05-18 Published:2020-12-30
  • Contact: Gao Jianfeng, Professor, Master’s supervisor, Graduate School of Henan University of Traditional Chinese Medicine, Zhengzhou 450046, Henan Province, China
  • About author:Wang Donghui, Master candidate, School of Basic Medicine, Henan University of Traditional Chinese Medicine, Zhengzhou 450046, Henan Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81373852 (to GJF)

摘要:

文题释义:
Notch信号通路:主要由Notch受体、Notch配体(DSL蛋白)、CSL(CBF-1,Suppressor of hairless,Lag)DNA结合蛋白等组成。Notch信号通路在神经干细胞增殖分化、突触可塑性及学习记忆中起着重要作用。
突触可塑性:是指突触结构与功能上的变化,对脑损伤修复起着重要的作用。突触可塑性是多基因调控的复杂过程,突触可塑性是大脑学习与长期记忆的基础。

背景:放射性脑损伤作为放疗后的严重并发症之一,严重危害人们的健康,损害学习及记忆功能,但是关于电针干预防治放射性脑损伤的报道相对较少。
目的:探讨电针干预对放射性脑损伤小鼠突触可塑性相关蛋白表达的影响。
方法:将30日龄C57BL/6J小鼠随机分为空白组、模型组和电针组。除空白组外,其余各组给予8 Gy放射剂量构建放射性脑损伤模型,电针组给予针刺“百会”“风府”及双侧“肾俞”穴干预21 d,同时腹腔注射BrdU。电针结束后,采用Morris水迷宫实验和T迷宫实验检测小鼠学习记忆能力,免疫组化法检测海马区BrdU阳性表达,Western blot检测海马区Notch信号通路相关蛋白Notch1和Hes1以及突触可塑性相关蛋白突触素、突触后致密蛋白95、脑源性神经营养因子的表达。
结果与结论:①电针干预显著改善放射性脑损伤小鼠学习记忆障碍;②模型组BrdU阳性表达较空白组显著减少(P < 0.01),电针组BrdU阳性表达较模型组显著增加(P < 0.01);③模型组Notch1、Hes1、突触后致密蛋白95、突触素和脑源性神经营养因子表达量较空白组降低(P < 0.01,P < 0.01,P < 0.01,P < 0.05,P < 0.01);与模型组比较,电针组Notch1、突触后致密蛋白95、突触素和脑源性神经营养因子表达量增加(P < 0.01,P < 0.01,P < 0.05,P < 0.01),Hes1表达量明显降低(P < 0.05);④结果表明,电针干预改善放射性脑损伤小鼠学习记忆功能的机制可能与Notch信号通路以及电针调节突触可塑性蛋白表达增加有关。

https://orcid.org/0000-0003-1772-5967(王冬慧) 

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: 电针, 放射性脑损伤, 突触可塑性, Notch, 信号通路, C57BL/6J小鼠, 学习, 记忆

Abstract: BACKGROUND: Radiation-induced brain injury, as one of the serious complications after radiotherapy, seriously endangers people's health and damages learning and memory functions. However, there are relatively few reports on the prevention and treatment of brain damage caused by electroacupuncture intervention.
OBJECTIVE: To explore the effect of electroacupuncture intervention on the expression of synaptic plasticity related proteins in mice with radiation-induced brain injury. 
METHODS:  C57BL/6J mice, 30 days old. were randomly divided into blank group, model group and electroacupuncture group. Except for the blank group, the other groups were given 8 Gy radiation dose to construct a radiation-induced brain injury model. The electroacupuncture group was given acupuncture at “Baihui” (GV 20), “Fengfu” (GV 16) and bilateral “Shenshu” (BL 23) for 21 days for intervention, and mice were intraperitoneally injected with BrdU. After electroacupuncture, Morris water maze test and T maze test were used to detect the learning and memory abilities of mice. Immunohistochemical method was used to detect the expression of BrdU in the hippocampus. Western blot assay was used to detect Notch1 and Hes1 related to Notch signaling pathway in the hippocampus, and synaptic plasticity-related proteins synaptophysin (SYN), postsynaptic density protein-95 (PSD-95) and brain-derived neurotrophic factor (BDNF) expression. 
RESULTS AND CONCLUSION: Electroacupuncture intervention significantly improved learning and memory impairment in mice with radiation-induced brain injury. The positive expression of BrdU in the model group was significantly lower than that in the blank group (P < 0.01), and the positive expression of BrdU in the electroacupuncture group was significantly increased (P < 0.01). The expression levels of Notch1, Hes1, PSD- 95, SYN and BDNF were lower in the model group than that of the blank group (P < 0.01, P < 0.01, P < 0.01, P < 0.05, P < 0.01). Compared with the model group, the expression levels of Notch1, PSD-95, SYN and BDNF increased in the electroacupuncture group (P < 0.01, P < 0.01, P < 0.05, P < 0.01), and the expression level of Hes1 decreased significantly (P < 0.05). Therefore, the mechanism by which electroacupuncture improves the learning and memory function of mice with radiation-induced brain injury may be related to the Notch signaling pathway and the increased expression of synaptic plasticity protein regulated by electroacupuncture.

Key words: electroacupuncture, radiation-induced brain injury, synaptic plasticity, Notch, signaling pathway, C57BL/6J mice, learning, memory

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