中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (5): 749-755.doi: 10.12307/2022.122

• 组织构建细胞学实验 cytology experiments in tissue construction • 上一篇    下一篇

电针干预脑缺血再灌注损伤模型大鼠核苷酸结合寡聚化结构域样受体蛋白3/半胱天冬氨酸蛋白酶1表达的变化

董苗苗1,2,赖  涵2,李曼玲1,许秀洪2,罗  梦2,王文豪1,2,周国平1,2   

  1. 1南方医科大学中医药学院,广东省广州市   510515;2 南方医科大学中西医结合医院,广东省广州市   510315
  • 收稿日期:2021-03-29 修回日期:2021-04-02 接受日期:2021-05-07 出版日期:2022-02-18 发布日期:2021-11-02
  • 通讯作者: 周国平,博士,教授,主任医师,南方医科大学中医药学院,广东省广州市 510515;南方医科大学中西医结合医院,广东省广州市 510315
  • 作者简介:董苗苗,女,1994年生,2019年南方医科大学毕业,硕士,主要从事中风病的基础及临床研究。
  • 基金资助:
    国家自然科学基金面上项目(81674048)

Effect of electroacupuncture on expression of nucleotide binding oligomerization domain-like receptor protein 3/cysteinyl aspartate specific proteinase 1 in rats with cerebral ischemia/reperfusion injury

Dong Miaomiao1, 2, Lai Han2, Li Manling1, Xu Xiuhong2, Luo Meng2, Wang Wenhao1, 2, Zhou Guoping1, 2   

  1. 1School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, Guangdong Province, China; 2Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510315, Guangdong Province, China
  • Received:2021-03-29 Revised:2021-04-02 Accepted:2021-05-07 Online:2022-02-18 Published:2021-11-02
  • Contact: Zhou Guoping, MD, Professor, Chief physician, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, Guangdong Province, China; Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510315, Guangdong Province, China
  • About author:Dong Miaomiao, Master, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, Guangdong Province, China; Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510315, Guangdong Province, China
  • Supported by:
    the National Natural Science Foundation of China (General Program), No. 81674048 (to ZGP)

摘要:

文题释义:
脑缺血再灌注损伤:脑组织对缺血缺氧较为敏感,缺血后出现神经功能受损,然而缺血一定时间恢复血流再灌注供应后,反而出现继发性组织损伤,较缺血时加重,脑缺血再灌注损伤的过程由多种病理因素参与并相互作用,最终造成多系统功能障碍。
核苷酸结合寡聚化结构域样受体蛋白3/半胱天冬氨酸蛋白酶1:炎症反应是参与脑缺血再灌注损伤过程的病理因素之一,核苷酸结合寡聚化结构域样受体蛋白3炎症小体在缺血再灌注诱导的脑损伤中被组装激活,继而活化半胱天冬氨酸蛋白酶1蛋白酶,切割炎症分子前体,诱导炎症级联反应,造成脑缺血再灌注后细胞焦亡,加重脑缺血再灌注损伤。


背景:对于脑缺血/再灌注损伤目前尚无有效的治疗方法,缓解脑缺血/再灌注损伤级联损伤对于治疗方法的探索至关重要。电针基于传统针灸和电疗法,可有效缓解缺血性脑卒中导致的神经功能损伤症状。
目的:基于核苷酸结合寡聚化结构域样受体蛋白3/半胱天冬氨酸蛋白酶1通路,探讨电针对脑缺血再灌注损伤大鼠的神经保护作用。
方法:48只SD大鼠随机分为假手术组、模型组、电针组、抑制剂组,每组12只,后3组应用线栓法制备脑缺血再灌注模型。半胱天冬氨酸蛋白酶1抑制剂用Z-YVAD-FMK干预,穴位选取“合谷”“尺泽”“三阴交”“足三里”。采用神经行为学评分评定神经功能症状,2,3,5-氯化三苯基四氮唑染色法观察脑组织梗死情况,电镜观察神经元焦亡,荧光定量PCR和蛋白质印迹检测核苷酸结合寡聚化结构域样受体蛋白3及半胱天冬氨酸蛋白酶1表达,免疫荧光染色观察小胶质细胞水平,酶联免疫吸附实验检测白细胞介素1β、白细胞介素18及肿瘤坏死因子α表达水平。
结果与结论:①与模型组比较,电针组和抑制剂组的神经功能缺损评分、脑组织梗死体积减少(P均< 0.05);②与模型组比较,电针组和抑制剂组的神经元焦亡减轻;③与模型组比较,电针组和抑制剂组的小胶质细胞减少,白细胞介素1β、白细胞介素18、肿瘤坏死因子α表达水平降低(P均< 0.05);④与模型组比较,电针组和抑制剂组核苷酸结合寡聚化结构域样受体蛋白3及半胱天冬氨酸蛋白酶1表达水平降低  (P均< 0.05);⑤表明电针可通过减少小胶质细胞水平、减少炎症反应、下调核苷酸结合寡聚化结构域样受体蛋白3/半胱天冬氨酸蛋白酶1表达、减轻脑缺血再灌注损伤大鼠的神经元焦亡,发挥神经保护作用。
缩略语:核苷酸结合寡聚化结构域样受体蛋白:nucleotide-binding oligomerization domain,leucine rich repeat and pyrin domain containing proteins,NLRP;半胱天冬氨酸蛋白酶:cysteinyl aspartate specific proteinase,Caspase;2,3,5-氯化三苯基四氮唑:2,3,5-Triphenyltetrazolium chloride,TTC

https://orcid.org/0000-0002-4613-4384 (周国平) 

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, 脑缺血再灌注损伤, 小胶质细胞, 细胞焦亡, 核苷酸结合寡聚化结构域样受体蛋白3, 半胱天冬氨酸蛋白酶1

Abstract: BACKGROUND: There is currently no effective treatment for cerebral ischemia/reperfusion injury, and for the exploration of treatments, it is crucial to mitigate cerebral ischemia/reperfusion injury cascade damage. Electroacupuncture can alleviate cerebral ischemia/reperfusion injury. 
OBJECTIVE: To explore the neuroprotective effect of electroacupuncture on cerebral ischemia/reperfusion injury in rats based on nucleotide binding oligomerization domain-like receptor protein 3 (NLRP3)/cysteinyl aspartate specific proteinase 1 (Caspase-1) pathway.
METHODS: Forty-eight Sprague-Dawley rats were randomly divided into a sham group, a model group, an electroacupuncture group and an inhibitor group, with 12 rats in each group. Animal models of cerebral ischemia/reperfusion injury were made in the latter three groups using the suture-occluded method. Caspase-1 inhibitor was intervened with Z-YVAD-FMK, and acupoints were selected as “Hegu,” “Chize,” “Sanyinjiao” and “Zusanli.” Zea longa method was used to evaluate the neurological symptoms. 2,3,5-Triphenyltetrazolium chloride staining was used to observe the condition of cerebral infarction. Electron microscope was used to observe the pyroptosis of neurons. Fluorescence quantitative PCR and western blot were used to detect the expression of NLRP3 and Caspase-1. Immunofluorescence staining was used to observe the level of microglia. Enzyme linked immunosorbent assay was used to detect the levels of interleukin-1β, interleukin-18 and tumor necrosis factor-α.
RESULTS AND CONCLUSION: (1) Compared with the model group, the neurological deficit score and infarct volume of brain tissue were decreased in the electroacupuncture group and inhibitor group (all P < 0.05). (2) Compared with the model group, pyroptosis of the cells was reduced in the electroacupuncture group and inhibitor group. (3) Compared with the model group, the number of microglia and the expression of interleukin-1β, interleukin-18 and tumor necrosis factor-α were decreased in the electroacupuncture group and inhibitor group (all P < 0.05). (4) Compared with the model group, the expression levels of NLRP3 and Caspase-1 were decreased in the electroacupuncture group and inhibitor group (all P < 0.05). In conclusion, electroacupuncture can reduce the level of microglia, reduce inflammatory reactions, and down-regulate the expression of NLRP3/Caspase-1, so as to reduce neuronal pyroptosis and exert a neuroprotective effect in rats with cerebral ischemia/reperfusion injury.

Key words: electroacupuncture, cerebral ischemia/reperfusion injury, microglia, pyroptosis, nucleotide binding oligomerization domain-like receptor protein 3, cysteinyl aspartate specific proteinase 1 

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