中国畜牧兽医 ›› 2023, Vol. 50 ›› Issue (11): 4664-4680.doi: 10.16431/j.cnki.1671-7236.2023.11.034

• 基础兽医 • 上一篇    下一篇

博落回叶提取物对小鼠溃疡性结肠炎的影响

马晓兰1, 董朕2, 岳美杉1, 常冠宇1, 曾建国1,2   

  1. 1. 山西农业大学动物医学学院, 中兽医药现代化山西省重点实验室, 太谷 030801;
    2. 湖南农业大学动物医学院, 中兽药湖南省重点实验室, 长沙 410125
  • 收稿日期:2023-05-31 出版日期:2023-11-05 发布日期:2023-10-27
  • 通讯作者: 曾建国 E-mail:zengjianguo@hunau.edu.cn
  • 作者简介:马晓兰,E-mail:mxlmxl1997@163.com。
  • 基金资助:
    “十四五”国家重点研发计划课题:基于新药材资源、新药用部位的中兽药创制(2022YFD1801101)

Effect of Macleaya cordata Leaf Extract on Ulcerative Colitis in Mice

MA Xiaolan1, DONG Zhen2, YUE Meishan1, CHANG Guanyu1, ZENG Jianguo1,2   

  1. 1. Shanxi Key Laboratory of Modernization of Traditional Chinese Veterinary Medicine, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, China;
    2. Hunan Key Laboratory of Chinese Veterinary Medicine, College of Veterinary Medicine, Hunan Agricultural University, Changsha 410125, China
  • Received:2023-05-31 Online:2023-11-05 Published:2023-10-27

摘要: 【目的】研究博落回叶提取物(Macleaya cordata leaf extract,MCLE)对葡聚糖硫酸钠(DSS)诱导的溃疡性结肠炎(UC)小鼠的保护作用,为博落回叶的资源利用和药物开发提供理论依据。【方法】选择60只C57BL/6小鼠,随机分成6组,即对照组(CON)组、DSS模型组、美沙拉嗪(MES)阳性对照组(200 mg/kg)及MCLE高(MCLE-H,450 mg/kg)、中(MCLE-M,150 mg/kg)、低(MCLE-L,50 mg/kg)剂量组,试验期14 d。通过小鼠的一般症状、体重变化、疾病活动指数(DAI)、脾脏指数、结肠长度及组织病理学等指标评价MCLE对DSS诱导的小鼠结肠炎模型的治疗效果。使用ELISA和实时荧光定量PCR分别检测血清和结肠组织中白细胞介素-1β(IL-1β)、IL-6、肿瘤坏死因子α(TNF-α)的表达水平;比色法测定结肠组织中髓过氧化物酶(MPO)和一氧化氮(NO)、过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GSH-Px)、超氧化物歧化酶(SOD)活性和丙二醛(MDA)含量;通过分析16S rRNA基因序列确定MCLE对肠道菌群的影响;采用气相色谱法测定结肠内容物中短链脂肪酸(SCFAs)的含量。【结果】MCLE处理组均极显著抑制了UC小鼠的体重降低和结肠长度的缩短(P<0.01),并显著降低了小鼠DAI、脾脏指数及结肠组织病理学评分(P<0.05);MCLE 显著下调了结肠和血清中 IL-1β、IL-6和TNF-α的表达(P<0.05),降低了结肠组织中 MPO、NO和MDA 的含量(P<0.05),增加了GSH-Px、SOD活性及CAT含量(P<0.05);与DSS组相比,拟杆菌属、另枝菌属、阿克曼氏菌属等有益菌属在MCLE给药组中丰度占比增加,病原菌如脱硫弧菌属等占比减少。此外,MCLE治疗还显著提高了UC小鼠肠内容物中SCFAs(乙酸、丙酸、丁酸)的水平(P<0.05)。【结论】MCLE可能是通过调节炎症因子水平、减轻氧化应激影响、维持肠道菌群稳态和恢复短链脂肪酸的产生发挥抗结肠炎作用。

关键词: 博落回叶提取物; 小鼠; 溃疡性结肠炎; 炎症因子; 肠道菌群; 短链脂肪酸

Abstract: 【Objective】 The purpose of this experiment was to study the protection of Macleaya cordata leaf extract (MCLE) on dextran sulfate sodium (DSS)-induced ulcerative colitis (UC) mice, and provide a theoretical basis for resource utilization and drug development of Macleaya cordata leaves.【Method】 Sixty C57BL/6 mice were randomly divided into 6 groups:Control group (CON), dextran sodium sulfate (DSS) model group, mesalazine (MES) positive control group (200 mg/kg), and MCLE high (MCLE-H, 450 mg/kg), medium (MCLE-M, 150 mg/kg) and low (MCLE-L, 50 mg/kg) dose groups.The test lasted for 14 days.The therapeutic effect of MCLE on DSS-induced colitis in mice was evaluated by general signs, body weight change, disease activity index (DAI), spleen index, colon length and histopathology.The expression levels of interleukin-1β (IL-1β), IL-6, tumor necrosis factor-α (TNF-α) in serum and colon tissues were detected by ELISA and Real-time quantitative PCR, respectively.The contents of myeloperoxidase (MPO), nitric oxide (NO), catalase (CAT), glutathione peroxidase (GSH-Px), superoxide dismutase (SOD) and malondialdehyde (MDA) in colonic tissue were determined by colorimetry.The effect of MCLE on intestinal flora was determined by analyzing 16S rRNA gene sequence.The content of short chain fatty acids (SCFAs) in colonic contents was determined by gas chromatography.【Result】 MCLE treatment significantly inhibited the weight loss and colon length shortening of UC mice (P<0.01), and significantly reduced DAI, spleen index and colon histopathological score (P<0.05).Moreover, MCLE significantly down-regulated the expression of IL-1β, IL-6 and TNF-α in colon and serum (P<0.05), decreased the content of MPO, NO and MDA in colon tissue (P<0.05), and increased the content of GSH-Px, SOD and CAT (P<0.05).At the same time, compared with DSS group, the abundance of beneficial bacteria such as Bacteroides, Alistipes and Akkermansia increased in MCLE administration group, and the proportion of pathogenic bacteria such as Desulfovibrio decreased.In addition, MCLE treatment also significantly increased the levels of SCFAs (acetic acid, propionic acid, butyric acid) in intestinal contents of UC mice (P<0.05).【Conclusion】 MCLE might play an anti-colitis role by regulating the level of inflammatory factors, reducing the effects of oxidative stress, maintaining intestinal flora homeostasis and restoring the production of SCFAs.

Key words: Macleaya cordata leaf extract; mice; ulcerative colitis; inflammatory factors; intestinal flora; short chain fatty acids

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