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
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(
)
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:
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(
)
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。
黄林林, 郑旺, 胡建国, 宋雪, 陶露, 耿志军, 李静, 左芦根, 葛思堂. 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[J]. 南方医科大学学报, 2026, 46(2): 423-433.
Linlin HUANG, Wang ZHENG, Jianguo HU, Xue SONG, Lu TAO, Zhijun GENG, Jing LI, Lugen ZUO, Sitang GE. Verbenalin ameliorates intestinal inflammation and colitis in a mouse model of Crohn's disease by inhibiting the PI3K-AKT pathway[J]. Journal of Southern Medical University, 2026, 46(2): 423-433.
| Gene | Primer sequence (5'to 3') |
|---|---|
| TNF-α | F: CACGCTCTTCTGTCTACTGAACTTC |
| R: CTTGGTGGTTTGTGAGTGTGAGG | |
| IL-1β | F: AATCTCGCAGCAGCACATCAAC |
| R: AGGTCCACGGGAAAGACACAG | |
| IL-6 | F: GAGAGGAGACTTCACAGAGGATACC |
| R: TCATTTCCACGATTTCCCAGAGAAC | |
| GAPDH | F: AACTCCCACTCTTCCACCTTCG R: TCCACCACCCTGTTGCTGTAG |
表1 引物序列
Tab.1 Primer sequences for RT-qPCR
| Gene | Primer sequence (5'to 3') |
|---|---|
| TNF-α | F: CACGCTCTTCTGTCTACTGAACTTC |
| R: CTTGGTGGTTTGTGAGTGTGAGG | |
| IL-1β | F: AATCTCGCAGCAGCACATCAAC |
| R: AGGTCCACGGGAAAGACACAG | |
| IL-6 | F: GAGAGGAGACTTCACAGAGGATACC |
| R: TCATTTCCACGATTTCCCAGAGAAC | |
| GAPDH | F: AACTCCCACTCTTCCACCTTCG R: TCCACCACCCTGTTGCTGTAG |
图1 VE干预对TNBS诱导的小鼠结肠炎症状的影响
Fig.1 Effects of VE treatment on TNBS-induced colitis symptoms in mice. A: Body weight changes. B: Disease activity index (DAI) scores. C: Spleen index. D: Spleen size. E: Gross morphology of mouse colon. F: Quantitative analysis of colon length. G: Histological inflammation score. H: HE staining of the colon tissue (n=10). *P<0.05.
图2 VE干预对小鼠肠屏障功能和结构的影响
Fig.2 Effects of VE on intestinal barrier function and structure in mice. A-D: Bacterial culture and translocation rates in the lymph nodes, liver, and spleen. E: Immunofluorescence staining of ZO-1 and claudin-1 in colonic mucosa. F-G: Western blotting bands and quantitative analysis of ZO-1 and claudin-1 protein expression (n=10). *P<0.05.
图3 VE干预对TNBS小鼠黏膜组织中的炎症介质水平的影响
Fig.3 Effects of VE on inflammatory mediator levels in colonic mucosa of TNBS-treated mice. A-C: ELISA detection of IL-6, IL-1β, and TNF-α protein levels. D-F: RT-qPCR analysis of IL-6, IL-1β, and TNF-α mRNA expression levels (n=10). *P<0.05.
图4 VE干预对LPS诱导的结肠类器官肠屏障损伤的影响
Fig.4 Effects of VE on LPS-induced intestinal barrier injury in colonic organoids. A: Immunofluorescence staining of ZO-1 and claudin-1. B: Microscopic images of colonic organoids. C: Quantitative analysis of organoid area. D-F: Western blotting for analysis of ZO-1 and claudin-1 protein expression levels (n=3). *P<0.05.
图5 VE干预对LPS诱导结肠类器官的炎症介质水平的影响
Fig.5 Effects of VE on inflammatory mediator levels in LPS-induced colonic organoids. A-C: ELISA detection of IL-6, IL-1β, and TNF-α protein levels. D-F: RT-qPCR analysis of IL-6, IL-1β, and TNF-α mRNA expression levels (n=3). *P<0.05.
图6 VE干预对PI3K-AKT的信号通路活化的影响
Fig.6 Effects of VE on PI3K-AKT signaling pathway activation. A, B: Western blotting for analysis of p-PI3K/PI3K and p-AKT/AKT protein expressions in colon tissues of TNBS-treated mice (n=10). C, D: Western blotting for analysis of p-PI3K/PI3K and p-AKT/AKT protein expressions in LPS-induced colonic organoids (n=3). *P<0.05.
图7 VE通过抑制PI3K-AKT信号通路来影响小鼠克罗恩病样结肠炎
Fig.7 VE ameliorates colitis in mice by inhibiting the PI3K-AKT signaling pathway. A: DAI scores following 740 Y-P intervention. B: Histological inflammation scores. C: HE staining of the colon tissue. D-E: mRNA and protein expression levels of IL-6, IL-1β, and TNF-α in the colonic mucosa. n=10, *P<0.05.
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