中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (16): 2488-2493.doi: 10.12307/2024.308

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

灸法预处理减轻脑缺血再灌注模型大鼠氧化应激损伤的机制

蒋  洁1,刘  娟2,于燕艳1,杨  越1,王千慧1   

  1. 1新疆医科大学中医学院,新疆维吾尔自治区乌鲁木齐市  830054;2新疆医科大学附属中医医院,新疆维吾尔自治区乌鲁木齐市  830000
  • 收稿日期:2023-02-22 接受日期:2023-04-18 出版日期:2024-06-08 发布日期:2023-07-29
  • 通讯作者: 蒋洁,硕士,副教授,新疆医科大学中医学院,新疆维吾尔自治区乌鲁木齐市 830054
  • 作者简介:蒋洁,女,1981年生,新疆维吾尔自治区乌鲁木齐市人,汉族,2008年上海中医药大学毕业,硕士,副教授,主要从事针灸作用机制的研究。
  • 基金资助:
    新疆维吾尔自治区高校科研计划项目(XJEDU2021Y025),项目负责人:蒋洁;“十四五”自治区高等学校重点学科(特色学科)中医学

Mechanism by which moxibustion pretreatment attenuates oxidative stress injury in a rat model of cerebral ischemia-reperfusion

Jiang Jie1, Liu Juan2, Yu Yanyan1, Yang Yue1, Wang Qianhui1   

  1. 1School of Traditional Chinese Medicine, Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China; 2Affiliated Hospital of Traditional Chinese Medicine, Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • Received:2023-02-22 Accepted:2023-04-18 Online:2024-06-08 Published:2023-07-29
  • Contact: Jiang Jie, School of Traditional Chinese Medicine, Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China
  • About author:Jiang Jie, Master, Associate professor, School of Traditional Chinese Medicine, Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China
  • Supported by:
    Xinjiang Uygur Autonomous Region University Research Program, No. XJEDU2021Y025 (to JJ); Key (Special) Disciplines of Traditional Chinese Medicine in Xinjiang Uygur Autonomous Region Universities during the 14th Five-Year Plan

摘要:


文题释义:

灸法预处理:属于中医治未病的范畴,在前驱症状出现时给予艾灸预处理在多种疾病发病过程中可明显减轻发病症状,延缓发病进程。 
氧化应激:是指体内氧化与抗氧化作用失衡的一种状态,在脑缺血后的再灌注损伤过程中发挥重要作用。


背景:艾灸预处理属于中医治未病的范畴,在前驱症状出现时给予艾灸预处理在多种疾病发病过程中可明显减轻发病症状,延缓发病进程,但其具体起效机制仍待研究。

目的:探讨SIRT1/FoxO3通路在灸法预处理改善脑缺血再灌注模型大鼠氧化应激损伤的作用机制。
方法:将48只SD大鼠随机分为假手术组、模型组、灸法预处理组、灸法预处理+EX527(SIRT1抑制剂)组,每组各12只。灸法预处理组在造模前给予百会、大椎、足三里麦粒灸,每穴灸3壮,每日1次,共治疗7 d;灸法预处理+EX527组在每次艾灸前30 min给予腹腔注射SIRT1抑制剂EX527(15 mg/kg)。在末次艾灸30 min后,除假手术组外,其他各组采用大脑中动脉线栓法制备大脑中动脉栓塞大鼠模型,脑缺血处理2 h后,拔除中动脉线栓,再灌注12 h;假手术组仅给予颈总动脉、颈内动脉、颈外动脉剥离,而并不插入线栓。再灌注12 h后对大鼠进行神经功能缺损评分,采用TTC染色法计算各组大鼠脑梗死体积,试剂盒检测梗死组织中氧化应激因子水平,Western-blot法检测大脑皮质缺血区中SIRT1、FoxO3、p-FoxO3、脑源性神经营养因子的蛋白表达。
结果与结论:①缺血再灌注12 h后,大鼠神经行为学评分模型组明显高于假手术组(P < 0.01),灸法预处理组明显低于模型组(P < 0.01),灸法预处理组低于灸法预处理+EX527组(P < 0.05)。②假手术组大鼠脑组织未见明显梗死灶,模型组大鼠右侧脑组织可见明显缺血灶(P < 0.01),灸法预处理组大鼠右侧梗死体积较模型组明显减少 (P < 0.01),灸法预处理+EX527组大鼠右侧梗死体积较灸法预处理组变大 (P < 0.01)。③再灌注12 h后,与假手术组比较,模型组丙二醛表达明显升高(P < 0.01),超氧化物歧化酶表达明显降低(P < 0.01);与模型组和灸法预处理+EX527组相比,灸法预处理组丙二醛表达明显降低(P < 0.01,P < 0.05),超氧化物歧化酶表达明显升高(P < 0.01,P < 0.05)。④与假手术组比较,模型组SIRT1、FoxO3、p-FoxO3、脑源性神经营养因子蛋白表达均明显升高(P < 0.01);与模型组比较,灸法预处理组SIRT1、FoxO3、脑源性神经营养因子明显升高(P < 0.01),p-FoxO3表达明显降低(P < 0.01);与灸法预处理+EX527组相比,灸法预处理组SIRT1、FoxO3、脑源性神经营养因子升高(P < 0.05),p-FoxO3表达差异无显著性意义(P > 0.05)。⑤结论:灸法预处理可显著改善脑缺血再灌注后大鼠的神经功能,其机制可能与激活SIRT1/FoxO3通路减轻脑缺血再灌注模型大鼠氧化应激损伤有关。

https://orcid.org/0000-0001-6517-8617(蒋洁)

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: 灸法预处理, 缺血再灌注, 氧化应激, SIRT1, FoxO3

Abstract: BACKGROUND: Pretreatment with moxibustion is a preventive treatment in traditional Chinese medicine. Pretreatment with moxibustion at the onset of prodromal symptoms can significantly reduce the symptoms and delay the onset of many diseases, but the exact mechanism remains to be studied.
OBJECTIVE: To investigate the mechanism of SIRT1/FoxO3 pathway in moxibustion pretreatment to ameliorate oxidative stress injury in cerebral ischemia-reperfusion model rats. 
METHODS: Forty-eight Sprague-Dawley rats were randomly divided into sham-operated group, model group, moxibustion pretreatment group, and moxibustion pretreatment+EX527 (SIRT1 inhibitor) group, with 12 rats in each group. The moxibustion pretreatment group was given moxibustion with seed-sized moxa cone at Baihui, Dazhui, and Zusanli before modeling, three moxa-cones per acupoint, once a day for 7 days. In the model group, moxibustion pretreatment group and moxibustion pretreatment+EX527 group, the rat model of middle cerebral artery occlusion was made by suturing of the middle cerebral artery 30 minutes after the last moxibustion. After 2 hours of cerebral ischemia, the middle artery suture was removed and the rats were reperfused for 12 hours. In the sham-operated group, only the common carotid artery, internal carotid artery, and external carotid artery were dissected without suturing the middle cerebral artery. In the moxibustion pretreatment+EX527 group, EX527 (15 mg/kg) was given intraperitoneally 30 minutes before each moxibustion. After 12 hours of reperfusion, the rats were scored for neurological deficits, and the cerebral infarct volume was calculated by 2,3,5-triphenyltetrazolium chloride staining method. The levels of oxidative stress factors in the infarcted tissues were detected by the kit method, and western-blot method was used to detect the expression levels of SIRT1, FoxO3, p-FoxO3 and brain-derived neurotrophic factor in the ischemic area of the cerebral cortex. 
RESULTS AND CONCLUSION: After 12 hours of reperfusion, the neurobehavioral score in the model group was significantly higher than that in the sham-operated group (P < 0.01), while the score in the moxibustion pretreatment group was significantly lower than that in the model group (P < 0.01) and moxibustion pretreatment+EX527 group (P < 0.05). There were no obvious infarct foci in the brain tissue of the sham-operated rats, but obvious ischemic foci were observed in the right side of the brain tissue of the rats in the model group (P < 0.01). The right infarct volume in the moxibustion pretreatment group was significantly reduced compared with the model group (P < 0.01), while the right infarct volume in the moxibustion pretreatment+EX527 group was significantly enlarged compared with the moxibustion pretreatment group. After 12 hours of reperfusion, the level of malondialdehyde was significantly elevated (P < 0.01) and the expression of superoxide dismutase was significantly decreased (P < 0.01) in the model group compared with the sham-operated group. The levels of malondialdehyde was significantly decreased (P < 0.01, P < 0.05) and the expression of superoxide dismutase was significantly increased (P < 0.01, P < 0.05) in the moxibustion pretreatment group compared with the model group and the moxibustion pretreatment+EX527 group. Western blot results showed that the expression levels of SIRT1, FoxO3, p-FoxO3, and brain-derived neurotrophic factor proteins were significantly higher in the model group compared with the sham-operated group (P < 0.01); compared with the model group, the expression levels of SIRT1, FoxO3, and brain-derived neurotrophic factor were significantly higher in the moxibustion pretreatment group (P < 0.01), and p-FoxO3 expression was significantly lower (P < 0.01); compared with the moxibustion pretreatment+EX527 group, the expression levels of SIRT1, FoxO3, and brain-derived neurotrophic factor were elevated in the moxibustion pretreatment group (P < 0.05), and no statistically significant difference was found in the p-FoxO3 expression (P > 0.05). To conclude, moxibustion pretreatment can significantly improve neurological function in rats after cerebral ischemia-reperfusion, and the mechanism may be related to the activation of SIRT1/FoxO3 pathway to reduce oxidative stress injury in the rat model of cerebral ischemia-reperfusion.

Key words: moxibustion pretreatment, ischemia-reperfusion, oxidative stress, SIRT1, FoxO3

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