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基于肠道菌群-色氨酸代谢-芳香烃受体轴探讨黄芩汤改善溃疡

          性结肠炎的作用机制
                                          Δ


          陈 颖 ,徐 荣,何 瑶,李 英,张之雨,吴至久(川北医学院附属医院中西医结合肛肠科,四川 南充
                                                         #
                *
          637000)

          中图分类号  R965;R285      文献标志码  A      文章编号  1001-0408(2026)09-1173-07
          DOI  10.6039/j.issn.1001-0408.2026.09.11

          摘  要  目的  探讨黄芩汤通过肠道菌群-色氨酸代谢-芳香烃受体(AhR)轴改善溃疡性结肠炎(UC)的机制。方法  将小鼠随机分
          为正常组(生理盐水)、模型组(生理盐水)、菌群消耗-模型组(生理盐水)、菌群消耗-黄芩汤组(9.1 g/kg,以生药量计;下同)、黄芩汤
          组及美沙拉嗪组(阳性对照组,0.4 g/kg),每组6只。通过自由饮用抗菌药物混合液10 d消耗菌群,自由饮用2.5%葡聚糖硫酸钠溶
          液7 d构建UC模型。造模成功后,各组小鼠灌胃相应药液/生理盐水,每天1次,连续10 d。末次给药后,测定小鼠体重变化比、疾
          病活动指数(DAI)评分、结肠长度,观察结肠病理学变化,检测血清中白细胞介素6(IL-6)、IL-10、IL-22、肿瘤坏死因子α(TNF-α)
          含量以及结肠组织中闭合蛋白(Occludin)、闭锁小带蛋白1(ZO-1)、AhR的表达,并对小鼠粪便进行高通量测序和色氨酸靶向代谢
          组学分析。结果  与模型组比较,黄芩汤组小鼠结肠组织炎症细胞浸润减少,肠黏膜结构恢复;体重变化比、结肠长度、血清中IL-
          10含量和结肠组织中Occludin、ZO-1、AhR表达水平以及色氨酸代谢物吲哚-3-丙酸(IPA)、N-乙酰-5-羟色胺(NAS)、吲哚-3-乙酸
         (IAA)含量均显著升高/增加(P<0.05);DAI评分以及血清中IL-6、TNF-α、IL-22含量和色氨酸代谢物吲哚-3-乙醇含量均显著降
          低(P<0.05);肠道菌群结构改善,乳杆菌属等有益菌的相对丰度呈升高趋势,大肠埃希氏菌-志贺氏菌属等致病菌的相对丰度呈
          降低趋势。然而,抗菌药物消耗菌群后,黄芩汤虽能显著升高小鼠粪便中NAS含量,但结肠组织中AhR蛋白表达未同步显著回
          升。结论  黄芩汤可通过调控肠道菌群,促进IPA、IAA产生,从而激活AhR,进而修复UC小鼠肠黏膜屏障;完整肠道菌群是黄芩
          汤发挥AhR调控作用的重要前提。
          关键词  黄芩汤;溃疡性结肠炎;肠道菌群;色氨酸代谢;芳香烃受体


          Mechanism  of  Huangqin  decoction  in  improving  ulcerative  colitis  based  on  the  gut  microbiota-tryptophan
          metabolism-aryl hydrocarbon receptor axis
          CHEN Ying,XU Rong,HE Yao,LI Ying,ZHANG Zhiyu,WU Zhijiu(Anorectal  Department  of  Integrated
          Traditional  Chinese  and  Western  Medicine,the  Affiliated  Hospital  of  North  Sichuan  Medical  College,  Sichuan
          Nanchong 637000,China)

          ABSTRACT   OBJECTIVE To investigate the mechanism of Huangqin decoction in improving ulcerative colitis (UC) through the
          gut microbiota-tryptophan metabolism-aryl hydrocarbon receptor (AhR) axis. METHODS Mice were randomly divided into normal
          group (normal  saline),  model  group (normal  saline),  microbiota  depletion-model  group (normal  saline),  microbiota  depletion-
          Huangqin  decoction  group (9.1  g/kg,  by  crude  drug,  similarly  hereinafter),  Huangqin  decoction  group  and  mesalazine  group
         (positive  control  group,  0.4  g/kg),  with  6  mice  in  each  group.  Microbiota  depletion  was  achieved  by  providing  free  access  to  a
          mixed antibiotics for 10 days. The UC model was induced by administering 2.5% dextran sulfate sodium solution for 7 days. After
          successful  modeling,  each  treatment  group  received  corresponding  drugs  or  normal  saline  intragastrically  once  daily  for  10  days.
          After  the  final  administration,  body  weight  change  ratio,  disease  activity  index (DAI)  score,  and  colon  length  were  evaluated;
          colon pathological changes were observed; serum levels of interleukin-6 (IL-6), IL-10, IL-22, and tumor necrosis factor-α (TNF-
          α) were measured; the expressions of Occludin, zonula occluden-1 (ZO-1), and AhR in colon tissue were detected; fecal samples
                                                             were  subjected  to  high-throughput  sequencing  to  analyze
             Δ 基金项目 四 川 省 中 医 药 管 理 局 科 学 技 术 研 究 专 项(No.    targeted  tryptophan  metabolomics.  RESULTS  Compared  with
          25MSZX567)                                         the  model  group,  Huangqin  decoction  group  showed  reduced
             *第一作者 硕士研究生。研究方向:中西医治疗肛肠疾病。
                                                             infiltration  of  inflammatory  cells  in  the  colon  tissue  and
          E-mail:yingchen9701@163.com
                                                             restoration  of  the  intestinal  mucosal  structure.  Body  weight
             # 通信作者 教授,硕士生导师。研究方向:中西医治疗肛肠疾病。
          E-mail:wzj549nc@126.com                            change  ratio,  colon  length,  serum  content  of  IL-10,  the


          中国药房  2026年第37卷第9期                                                China Pharmacy  2026 Vol. 37  No. 9    · 1173 ·
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