中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (35): 5614-5619.doi: 10.12307/2022.922

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

电针足三里减轻脓毒症模型大鼠心肌损伤的作用机制

耿  欢1,罗振东2,孙芳园1,孟佳磊1,马宇慧1,雷  鸣1   

  1. 1上海中医药大学附属第七人民医院,上海市  200137;2上海市虹口区江湾医院,上海市  200137
  • 收稿日期:2021-12-28 接受日期:2022-02-25 出版日期:2022-12-18 发布日期:2022-05-17
  • 通讯作者: 雷鸣,硕士,主任医师,博士生导师,上海中医药大学附属第七人民医院,上海市 200137
  • 作者简介:耿欢,1996年生,安徽省宿州市人,汉族,上海中医药大学在读硕士,主要从事中西医结合急危重症方向的研究。
  • 基金资助:
    国家自然科学基金面上项目(81973649,8217141990),项目负责人:雷鸣;浦东新区卫生健康委员会领先人才培养项目(pwr12019-02),项目负责人:雷鸣

Mechanism of electroacupuncture at Zusanli against myocardial injury in rats with sepsis

Geng Huan1, Luo Zhendong2, Sun Fangyuan1, Meng Jialei1, Ma Yuhui1, Lei Ming1   

  1. 1Seventh People’s Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200137, China; 2Jiangwan Hospital, Hongkou District, Shanghai 200137, China
  • Received:2021-12-28 Accepted:2022-02-25 Online:2022-12-18 Published:2022-05-17
  • Contact: Lei Ming, Master, Chief physician, Doctoral supervisor, Seventh People’s Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200137, China
  • About author:Geng Huan, Master candidate, Seventh People’s Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200137, China
  • Supported by:
    the National Natural Science Foundation of China (General Program), Nos. 81973649 and 8217141990 (to LM); Pudong New Area Health Committee Leading Talents Training Project, No. pwr12019-02 (to LM)

摘要:

文题释义:
脓毒症心肌损伤:发病机制复杂,涉及氧化应激、炎症递质失调、线粒体功能障碍、心肌细胞凋亡等多种病理机制,是多种细胞因子作用的结果,其中在整个病理生理过程中促炎因子、抗炎因子等构成了复杂的炎症网络系统,在调节持续心肌损伤病理过程中发挥着重要作用。
核因子κB信号通路:核因子κB是由5种蛋白质p65(RelA)、p50、RelB、c-Rel、p52组成的二聚转录因子家族,它是各种炎症反应的重要转导通路,参与细胞炎症以及免疫应答等重要生命活动。

背景:既往研究发现针刺足三里可减轻脓毒症大鼠心肌受损程度,其机制研究尚少。
目的:探讨电针足三里对脓毒症大鼠心肌损伤的影响及其可能机制。
方法:将48只SD大鼠随机均分成对照组、模型组、足三里组、非经非穴组,每组12只。除对照组外采用盲肠结扎穿孔术构造脓毒症大鼠心肌损伤动物模型,对照组仅开腹游离盲肠不进行盲肠穿孔结扎。于造模后3 h对电针组及非经非穴组大鼠进行电针干预,疏密波,频率10 Hz,每次治疗15 min,连续治疗3次后取材。通过苏木精-伊红染色、TUNEL染色法、ELISA法检测心肌损伤情况及炎症因子水平,Western blot检测核因子κB信号通路相关蛋白——Bax、p65、Bcl-2、IκBα蛋白的表达水平。
结果与结论:①与对照组相比,模型组与非经非穴组均可见心肌纤维组织紊乱,心肌细胞凋亡率明显升高(P < 0.05);与模型组相比,足三里组心肌细胞排列相对规则且细胞凋亡率下降(P < 0.05);②与对照组比较,模型组、非经非穴组大鼠血清肿瘤坏死因子α、白细胞介素6、白细胞介素1β及心肌损伤标志物肌酸激酶同工酶、心肌肌钙蛋白质量浓度均显著升高,差异有显著性意义(P < 0.05);与模型组相比,足三里组大鼠上述指标的质量浓度均显著降低,差异有显著性意义(P < 0.05),非经非穴组未见显著差异(P > 0.05);③与对照组相比,模型组和非经非穴组大鼠心肌组织p65、IκBα、Bax的蛋白表达明显上调,Bcl-2的蛋白表达明显下调,差异有显著性意义(P < 0.05);与模型组相比,足三里组大鼠心肌组织p65、IκBα、Bax的蛋白表达明显下调,Bcl-2蛋白表达明显上调,差异有显著性意义(P < 0.05);④结果说明电针足三里可以减轻脓毒症大鼠心肌损伤,其调控机制可能与降低炎症反应、调节核因子κB信号通路相关蛋白水平有关。
缩略语:肌酸激酶同工酶:creatine kinase isoenzyme-MB,CK-MB;心肌肌钙蛋白:cardiac troponin I,cTnI

https://orcid.org/0000-0003-0788-3734 (耿欢)

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: 脓毒症, 电针, 心肌损伤, 炎性反应, 肌酸激酶同工酶, 心肌肌钙蛋白, 大鼠

Abstract: BACKGROUND: Previous studies have found that acupuncture at Zusanli can reduce the degree of myocardial injury in septic rats, but there are few studies on the mechanism.
OBJECTIVE: To investigate the effect of electroacupuncture at Zusanli on myocardial injury in septic rats and its possible mechanism.
METHODS: Forty-eight Sprague-Dawley rats were randomly divided into control group, model group, Zusanli group, and non-acupoint group, with 12 rats in each group. The cecal ligation and perforation was used to construct an animal model of myocardial injury in septic rats. In the control group, only the free cecum was exposed without the cecal perforation and ligation. Three hours after modeling, the rats in the electroacupuncture group and the non-acupoint group were treated with electroacupuncture, dilatation waves, 10 Hz, once for 15 minutes, for 3 consecutive treatments. Hematoxylin-eosin staining, TUNEL staining, and ELISA were used to detect myocardial injury conditions and inflammatory factor levels. Western blot was used to detect the expression of Bax, p65, Bcl-2, and IκBα proteins.
RESULTS AND CONCLUSION: Compared with the control group, both the model and non-acupoint groups showed myocardial fibrous tissue disorder and significantly increased apoptosis rate of myocardial cells (P < 0.05). Compared with the model group, the electroacupuncture group showed relatively regular cell arrangement and decreased apoptosis rate (P < 0.05). Compared with the control group, serum inflammatory factors interleukin-1β, tumor necrosis factor-α and interleukin-6 and myocardial injury markers creatine kinase isoenzyme-MB and cardiac troponin I levels were significantly increased in the model and non-acupoint groups (P < 0.05). Compared with the model group, serum inflammatory factors interleukin-1β, tumor necrosis factor-α and interleukin-6 and myocardial injury markers creatine kinase isoenzyme-MB and cardiac troponin I levels were significantly reduced in the electroacupuncture group (P < 0.05) but had no significant changes in the non-acupoint group (P > 0.05). Compared with the control group, the protein expressions of Bax, p65, and IκBα were significantly up-regulated, and the expression of Bcl-2 protein was significantly down-regulated (P < 0.05). Compared with the model group, the protein expressions of Bax, p65, and IκBα were significantly down-regulated and the expression of Bcl-2 protein was significantly up-regulated (P < 0.05). To conclude, electroacupuncture at Zusanli can alleviate myocardial injury in septic rats, and its regulatory mechanism may be related to reducing inflammation and regulating the changes in nuclear factor-κB signaling pathway-related protein levels.

Key words: sepsis, electroacupuncture, myocardial injury, inflammatory reaction, creatine kinase isoenzyme-MB, cardiac troponin I, rat

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