Abstract
Objective
To observe the effect of electroacupuncture (EA) on gut microbiota and serum inflammatory factors interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) in Crohn disease (CD) model rats.
Methods
Thirty-six Sprague-Dawley rats were randomly divided into a normal control (NC) group with 10 rats and a modeling group with 26 rats. In the modeling group, the CD rat model was prepared with 2, 4, 6-trinitrobenzene sulfonic acid (TNBS) enema. After successful modeling, the rats were randomly divided into a CD model (CD) group, an EA group, and a Western medicine (WM) group. The NC and CD groups received no treatment; the EA group was treated with EA for 20 min each time, with 7 consecutive days’ intervention; the WM group received mesalazine enteric-coated tablet solution by gavage once a day for 7 d. The changes in body mass and disease activity index (DAI) were observed. Serum IL-1β and TNF-α were determined by enzyme-linked immunosorbent assay. The hematoxylin-eosin staining was used to observe the pathological changes of colon tissue, and 16S rDNA sequencing was used to analyze the structural changes of gut microbiota.
Results
Compared with the NC group, the body mass of rats in the CD group decreased (P<0.01), and the DAI score increased (P<0.01); the colon tissue structure was disordered, and many inflammatory cells were present; also, IL-1β and TNF-α increased significantly (P<0.01). As a result, the diversity of gut microbiota decreased, and the abundance of some conditional pathogenic bacteria (such as Prevotella) increased, while the abundance of beneficial bacteria (such as Lactobacillus, Rochella, and Spirillum) decreased. After the intervention, compared with the CD group, the body mass of rats in the EA group and WM group increased (P<0.01); the DAI score decreased (P<0.01), the colon tissue structure improved, and the IL-1β and TNF-α levels decreased (P<0.01); the diversity of gut microbiota increased (P<0.05), and the abundance of some conditional pathogenic bacteria decreased while the abundance of beneficial bacteria increased in the EA group; whereas the diversity of gut microbiota in the WM group was not statistically different (P>0.05).
Conclusion
EA can reduce the damage of colon mucosa, regulate the imbalance of gut microbiota, and inhibit the serum inflammatory factor IL-1β and TNF-α expression in CD rats.
摘要
目的
观察电针对克罗恩病(CD)模型大鼠肠道菌群及其血清炎症因子白细胞介素-1β(IL-1β)及肿瘤坏死因子-α (TNF-α)的影响。
方法
将36只Sprague-Dawley大鼠随机分为空白组(10只)和造模组(26只)。造模组采用三硝基苯磺酸 (TNBS)灌肠液制备CD大鼠模型。将造模成功的大鼠随机分为模型组、电针组和西药组。空白组和模型组不予治疗 干预; 电针组取双侧上巨虚和天枢进行电针治疗, 每次治疗20 min, 连续干预7 d; 西药组予以美沙拉嗪肠溶片溶液灌 胃治疗, 1次/d, 共灌胃7次。观察大鼠的体质量变化、疾病活动指数评分(DAI), 酶联免疫反应吸附法测定血清IL-1β及 TNF-α含量浓度, 苏木素-伊红染色观察结肠组织病理学变化, 16S rDNA测序分析各组肠道菌群的结构变化。
结果
与 **常组比较, 模型组体质量下降(P<0.01), DAI评分升高(P<0.01), 结肠组织结构混乱, 大量炎性细胞浸润, IL-1β及TNF-α 含量浓度升高(P<0.01), 菌群多样性下降, 部分条件致病菌的丰度(如普雷沃菌属)上升, 而有益菌的丰度(如乳杆菌、罗 氏菌属、颤螺菌属)下降。干预后, 与模型组比较, 电针组和西药组大鼠体质量上升(P<0.01), DAI评分下降(P<0.01), 结 肠组织结构有所好转, IL-1β及TNF-α含量下降(P<0.01); 电针组肠道菌群多样性上升(P<0.05), 部分条件致病菌丰度下 降, 而有益菌丰度上升; 西药组肠道菌群α多样性指数变化无统计学意义(P>0.05)。
结论
电针上巨虚和天枢可减轻CD 大鼠结肠黏膜损伤并调节肠道菌群失衡状态, 抑制血清炎性因子IL-1β及TNF-α的表达。
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Acknowledgments
This work was supported by the Projects of National Natural Science Foundation of China (国家自然科学基金 项目, No. 81774438, No. 81603705, No. 81904097); Fund Project of Hunan Province Education Office (湖南省教育 厅资助科研项目, No. 21A0235); Projects of Administration of Traditional Chinese Medicine of Hunan Province (湖南省中医药管理局科研项目, No. B2023109, No. C2022027); Natural Science Foundation of Changsha (长沙市自然科学基金, No. kq2208183); Science and Technology Talent-lifting Program of Hunan (湖南省科技 人才托举工程项目, No. 2019TJ-Q04); “Furong Scholar Award Program” of Hunan Province [湖南省“芙蓉学者奖 励计划”, No. 湘教通 (2020)58 号]; Science and Technology Research Program of Chongqing Municipal Education Commission (重庆市教育委员会科学技术研 究项目, No. KJQN202002714, No. KJQN202102708); Graduate Student Research Innovation Project of Hunan Province (湖南省研究生科研创新项目, No. QL20220188); Research Fund of Hunan University of Chinese Medicine (湖南中医药大学校级科研基金, No. 2021XJJJ013, No. 2022CX108).
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The treatment of animals conformed to the ethical criteria in this experiment.
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First Author: LIU Qiong, M.D., lecturer
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Liu, Q., He, H., Yang, J. et al. Effect of electroacupuncture on gut microbiota and related inflammatory factors in rats with Crohn disease. J. Acupunct. Tuina. Sci. 22, 12–21 (2024). https://doi.org/10.1007/s11726-023-1365-5
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DOI: https://doi.org/10.1007/s11726-023-1365-5
Keywords
- Acupuncture Therapy
- Electroacupuncture
- Crohn Disease
- Gut Microbiome
- Interleukin-1beta
- Tumor Necrosis Factor-alpha
- Rats