南方医科大学学报 ›› 2026, Vol. 46 ›› Issue (2): 423-433.doi: 10.12122/j.issn.1673-4254.2026.02.20

• • 上一篇    

马鞭草苷通过抑制PI3K-AKT通路减轻肠上皮炎症改善小鼠克罗恩病样结肠炎

黄林林1(), 郑旺1, 胡建国2,4, 宋雪3,4, 陶露3,4, 耿志军3,4, 李静2,4, 左芦根1,4, 葛思堂1,4()   

  1. 1.蚌埠医科大学第一附属医院,胃肠外科,安徽 蚌埠 233004
    2.蚌埠医科大学第一附属医院,检验科,安徽 蚌埠 233004
    3.蚌埠医科大学第一附属医院,中心实验室,安徽 蚌埠 233004
    4.炎症相关性疾病基础与转化研究安徽省重点实验室,安徽 蚌埠 233004
  • 收稿日期:2025-06-09 出版日期:2026-02-20 发布日期:2026-03-10
  • 通讯作者: 葛思堂 E-mail:huangl1nl1n@163.com;gesitang@163.com
  • 作者简介:黄林林,在读硕士研究生,E-mail: huangl1nl1n@163.com
  • 基金资助:
    安徽省临床医学研究转化项目(202427b10020017);安徽高校自然科学研究项目(2024AH051222)

Verbenalin ameliorates intestinal inflammation and colitis in a mouse model of Crohn's disease by inhibiting the PI3K-AKT pathway

Linlin HUANG1(), Wang ZHENG1, Jianguo HU2,4, Xue SONG3,4, Lu TAO3,4, Zhijun GENG3,4, Jing LI2,4, Lugen ZUO1,4, Sitang GE1,4()   

  1. 1.Department of Gastrointestinal Surgery, First Affiliated Hospital of Bengbu Medical University, Bengbu 233004, China
    2.Department of Clinical Laboratory, First Affiliated Hospital of Bengbu Medical University, Bengbu 233004, China
    3.Central Laboratory, First Affiliated Hospital of Bengbu Medical University, Bengbu 233004, China
    4.Anhui Key Laboratory of Basic and Translational Research on Inflammation-Related Diseases, Bengbu 233004, China
  • Received:2025-06-09 Online:2026-02-20 Published:2026-03-10
  • Contact: Sitang GE E-mail:huangl1nl1n@163.com;gesitang@163.com

摘要:

目的 探讨天然植物提取物马鞭草苷(VE)对克罗恩病(CD)样结肠炎的改善作用及其机制。 方法 建立2,4,6-三硝基苯磺酸(TNBS)诱导的小鼠结肠炎模型和脂多糖(LPS)刺激的结肠类器官损伤模型。将50只C57BL/6小鼠随机分为5组:WT组、TNBS组,VE低、中、高剂量组(5、10、20 mg/kg),10只/组。TNBS模型通过25 mg/L TNBS乙醇溶液灌肠建立,VE组每日腹腔注射相应剂量药物,连续治疗7 d。结肠类器官取自C57BL/6小鼠结肠隐窝,培养至第10天分为对照组、LPS组(100 μg/mL LPS处理24 h)和LPS+VE组(5、10、20 μmol/L VE共处理)。通过疾病活动指数(DAI)、结肠组织病理学评分、脾指数及炎症因子水平(IL-6、IL-1β、TNF-α)评估VE的疗效;采用免疫荧光染色、Western blotting检测紧密连接蛋白(ZO-1、Claudin-1)的表达;利用Western blotting检测PI3K-AKT通路蛋白的表达变化;结合PI3K-AKT通路激动剂740 Y-P干预实验验证通路调控机制。 结果 VE缓解TNBS小鼠的结肠炎症状(降低DAI评分、结肠炎症评分及脾指数,缓解体质量下降和结肠缩短)(P<0.05),同时,VE干预可下调黏膜组织促炎因子(IL-6、IL-1β、TNF-α)的表达(P<0.05),上调ZO-1和Claudin-1蛋白表达(P<0.05),减少细菌移位(P<0.05)。机制上,VE可下调p-PI3K、p-AKT蛋白的表达(P<0.05),且其疗效可被PI3K-AKT激动剂(740 Y-P)逆转(P<0.05)。 结论 VE通过调控PI3K-AKT信号通路抑制肠道炎症,从而修复肠屏障功能,改善小鼠CD样结肠炎。

关键词: 克罗恩病, 炎症性肠病, 肠屏障, PI3K-AKT, 马鞭草苷

Abstract:

Objective To investigate the therapeutic effect of verbenalin (VE) on Crohn's disease (CD)‑like colitis and the underlying molecular mechanism. Methods Fifty C57BL/6 mice were randomly divided into control group, TNBS group, and low-, medium-, and high-dose VE treatment groups (n=10). Mouse models of CD-like colitis were established in all but the control group by enema with 25 mg/L TNBS dissolved in ethanol, and the mice in VE treatment groups received daily intraperitoneal injections of VE at 5, 10, or 20 mg/kg for 7 days. Cultured colon organoids derived from mouse crypts were exposed to 100 μg/mL lipopolysaccharide (LPS) for 24 h and treated with 5, 10, or 20 μmol/L VE. The therapeutic effects of VE in the mouse models were evaluated by assessing changes in disease activity index (DAI), histopathological scores, and spleen index. In both colonic mucosa of the mouse models and the colon organoids, the levels of inflammatory cytokines, expressions of tight junction proteins, and changes in PI3K-AKT pathway proteins were analyzed, and the regulatory mechanism of VE was verified using the PI3K-AKT agonist 740 Y-P. Results In TNBS-treated mice, VE treatment significantly reduced DAI, histopathological scores, and spleen index, and mitigated weight loss, colon shortening and bacterial translocation. VE obviously lowered the expression of pro-inflammatory cytokines in colonic mucosa of the mice and the colon organoids, upregulated ZO-1 and claudin-1 expressions, and reduced bacterial translocation. VE significantly downregulated p-PI3K and p-AKT protein expressions, which was reversed by treatment with 740 Y-P. Conclusion VE inhibits intestinal inflammation and protects intestinal barrier function in mice with CD-like colitis by modulating the PI3K-AKT signaling pathway.

Key words: Crohn's disease, inflammatory bowel disease, intestinal barrier, PI3K-AKT, verbenalin