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·药学研究·
紫云英苷调节肠道菌群缓解小鼠溃疡性结肠炎的作用机制
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黄 静 ,廖艳花 ,莫昕莹 ,杨裕婷 ,蒋伟哲 (1.右江民族医学院附属医院药学部,广西 百色 533000;2.广西
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医科大学药学院,南宁 530021)
中图分类号 R285.5;R965 文献标志码 A 文章编号 1001-0408(2025)14-1709-08
DOI 10.6039/j.issn.1001-0408.2025.14.04
摘 要 目的 探究紫云英苷(AG)调节肠道菌群缓解小鼠溃疡性结肠炎(UC)的潜在作用机制。方法 将雄性C57BL/6小鼠随机
分为正常组(CON组)、模型组[葡聚糖硫酸钠(DSS)组]、5-氨基水杨酸组(5-ASA组)、AG低剂量组和高剂量组(AGL、AGH组),每
组8只。除CON组外,其余组小鼠以连续饮用3%DSS溶液7 d的方式建立小鼠UC模型;随后,将3%DSS溶液换为水,各药物组小
鼠灌胃相应药液,CON组和DSS组小鼠灌胃等体积生理盐水,每天1次,连续7 d。末次灌胃后,比较各组小鼠的体重变化指数、疾
病活动指数(DAI)评分、结肠长度和脾脏指数、炎症因子(肿瘤坏死因子α、白细胞介素1β、白细胞介素6)水平;观察各组小鼠结肠
组织的病理改变,并比较其病理学评分、杯状细胞占比;检测各组小鼠肠道屏障相关因子[闭合蛋白(occludin)和紧密连接蛋白ZO-
1]和炎症相关因子[沉默信息调节因子1(SIRT1)、c-Jun氨基末端激酶(JNK)和p38丝裂原活化的蛋白激酶(p38 MAPK)]mRNA的
表达情况;分析各组小鼠的肠道菌群变化情况并检测其肠道代谢物短链脂肪酸水平(SCFAs)含量;以DSS、AG处理的粪菌液为干
预手段,通过粪便菌群移植实验进一步验证AG的抗UC机制。结果 与CON组比较,DSS组小鼠肠道黏膜结构受损严重,炎症细
胞跨壁浸润明显;其体重变化指数,结肠长度,杯状细胞占比,occludin、ZO-1、SIRT1 mRNA的表达,Chao1和Shannon指数,乙酸和
丁酸含量均显著降低、缩短或下调(P<0.05);DAI评分、脾脏指数、炎症因子水平、病理学评分和p38 MAPK、JNK mRNA的表达
均显著升高或上调(P<0.05)。与 DSS 组比较,AG 各剂量组小鼠结肠组织病变有不同程度好转,上述各定量指标均普遍回调
(P<0.05),且AG处理的粪菌液的干预作用与AG基本一致。结论 AG可改善UC小鼠的相关症状,减轻其炎症反应和结肠组织
病理改变;上述作用可能与调节小鼠肠道菌群多样性,增加丁酸、丙酸含量,促进结肠黏膜屏障的修复,进而调控 SIRT1/p38
MAPK炎症通路相关基因表达有关。
关键词 紫云英苷;溃疡性结肠炎;肠道菌群;炎症;短链脂肪酸
Mechanism of astragalin in allevating ulcerative colitis in mice through modulation of the intestinal flora
HUANG Jing ,LIAO Yanhua ,MO Xinying ,YANG Yuting ,JIANG Weizhe (1. Dept. of Pharmacy, the
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Affiliated Hospital of Youjiang Medical University for Nationalities, Guangxi Baise 533000, China;2. School of
Pharmacy, Guangxi Medical University, Nanning 530021, China)
ABSTRACT OBJECTIVE To explore the potential mechanisms of astragalin (AG) in allevating ulcerative colitis (UC) in mice
through modulation of the intestinal flora. METHODS Male C57BL/6 mice were randomly divided into normal group (CON
group), model group [dextran sodium sulfate (DSS) group], 5-aminosalicylic acid group (5-ASA group), AG low-dose group and
high-dose group (AGL and AGH groups), with 8 mice in each group. The mice UC model was established by drinking 3% DSS
solution continuously for 7 days in all groups except the CON group. After that, 3% DSS solution was replaced by water, and the
mice of each drug group were gavaged with the corresponding drug solution. Mice in the CON and DSS groups were gavaged with
an equal volume of normal saline, once a day, for 7 days. After the last gavage, the body weight change index, disease activity
index (DAI) score, colon length and spleen index, and levels of inflammatory factors (tumor necrosis factor-α, interleukin-1β,
interleukin-6) were compared among the mice in each group; pathological changes in colonic tissues of the mice were observed in
each group, and the pathological score and the percentage of goblet cells were compared; mRNA expressions of barrier-related
factors [occludin and ZO-1] and inflammation-related factors [silencing information regulatory factor 1 (SIRT1), c-Jun N-terminal
kinase (JNK) and p38 mitogen-activated protein kinase (p38 MAPK)] were detected in each group of mice; the changes in the
intestinal flora of mice in each group were analyzed and the
Δ 基金项目 国家自然科学基金项目(No.82460806)
*第一作者 主管药师,硕士研究生。研究方向:中药药理学。电 contents of intestinal metabolites short-chain fatty acids
话:0776-2835884。E-mail:734581428@qq.com (SCFAs) was determined. Using DSS and AG-treated fecal
# 通信作者 教授,硕士生导师,博士。研究方向:中药研究与开 bacterial liquid as an intervention, the mechanism of anti-UC
发。电话:0771-4528697。E-mail:jiangweizhe@gxmu.edu.cn effect of AG was further verified by a fecal microbiota
中国药房 2025年第36卷第14期 China Pharmacy 2025 Vol. 36 No. 14 · 1709 ·