基础医学与临床 ›› 2024, Vol. 44 ›› Issue (1): 77-83.doi: 10.16352/j.issn.1001-6325.2024.01.0077

• 研究论文 • 上一篇    下一篇

汉黄芩素促进自身免疫性肝炎模型大鼠Th17/Treg细胞平衡

邓娟, 王秀芳, 孙瑞青*   

  1. 空军军医大学第一附属医院 消化内科,陕西 西安 710032
  • 收稿日期:2023-03-22 修回日期:2023-07-18 出版日期:2024-01-05 发布日期:2023-12-25
  • 通讯作者: *:qwwmww@163.com

Wogonin promotes Th17/Treg cell balance in rat models with autoimmune hepatitis

DENG Juan, WANG Xiufang, SUN Ruiqing*   

  1. Department of Gastroenterology, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
  • Received:2023-03-22 Revised:2023-07-18 Online:2024-01-05 Published:2023-12-25
  • Contact: *:qwwmww@163.com

摘要: 目的 探讨汉黄芩素(WG)对自身免疫性肝炎(AIH)大鼠Th17/Treg细胞平衡的影响。方法 随机选出10只大鼠作为对照组,其余大鼠通过尾静脉注射伴刀豆球蛋白A(ConA,12.5 mg/kg)溶液构建AIH模型大鼠。将造模成功大鼠随机平分为AIH组、L-WG组(10 mg/kg)、M-WG组(20 mg/kg)、H-WG组(30 mg/kg)、H-WG+VPA组[30 mg/kg WG+300 mg/kg Notch信号通路激活剂丙戊酸(VPA)],每组10只,每天给药1次,持续10 d。ELISA检测血清中炎性因子及肝功能指标;HE染色观察肝脏组织病理形态;流式细胞测量术检测脾脏Th17/Treg细胞水平;Western blot检测脾脏类视黄酸相关孤儿受体γt(RORγt)、叉头框蛋白P3(Foxp3)以及肝组织Notch信号通路蛋白质的表达。结果 对照组大鼠肝组织结构正常,染色清晰;AIH组大鼠肝组织细胞出现水肿,细胞体积增大导致肝窦受压变窄,出现大量炎性细胞浸润以及少量坏死现象。AIH组较对照组丙氨酸氨基转移酶(ALT)、天门冬氨酸氨基转移酶(AST)活性、白介素(IL)-17和IL-23含量、Th17细胞水平、Th17/Treg、RORγt、Notch、hes家族bHLH转录因子1(HES1)、含YRPW基序的bHLH转录因子hes相关家族1(HEY1)蛋白表达均显著上升(P<0.05),IL-10和TNF-β含量、Treg细胞水平、Foxp3蛋白水平均显著下降(P<0.05);与AIH组相比,L-WG组、M-WG组、H-WG组肝损伤情况得到改善,ALT、AST活性、IL-17和IL-23含量、Th17细胞水平、Th17/Treg、RORγt、Notch、HES1、HEY1蛋白表达均显著降低(P<0.05),IL-10和TNF-β含量、Treg细胞水平、Foxp3蛋白水平均显著升高(P<0.05);VPA逆转了H-WG对AIH大鼠的改善效果。结论 WG可能通过下调Notch信号通路促进AIH大鼠Th17/Treg细胞平衡。

关键词: 汉黄芩素, Notch信号通路, 自身免疫性肝炎, Th17/Treg细胞

Abstract: Objective To investigate the impacts of wogonin (WG) on Th17/Treg cell balance in autoimmune hepatitis (AIH) rats. Methods A total of 10 rats were randomly selected as the control group. The remaining rats were injected with concanavalin A (ConA, 12.5 mg/kg) solution via tail vein to construct AIH model rat, which were randomly divided into AIH group, L-WG group (10 mg/kg), M-WG group (20 mg/kg), H-WG group (30 mg/kg), H-WG+VPA group (30 mg/kg WG+300 mg/kg Notch signal pathway activator VPA), 10 rats in each group and administered once a day for 10 days. Serum inflammatory factors and liver function indexes were detected by ELISA; HE staining was used to observe the pathological morphology of liver tissue; the level of spleen Th17/Treg cells was detected by flow cytometry; Western blot was used to detect the expression of spleen retinoid acid related orphan receptor γ t (RORγt), fork head box protein P3 (Foxp3) and liver Notch signal pathway proteins. Results The liver tissue structure of control group was normal and the staining was clear; In AIH group, the cells of liver tissue showed edema, the increase of cell volume led to the compression and narrowing of liver sinuses, and a large number of inflammatory cell infiltration and a small amount of necrosis occurred. The contents of alanine aminotransferase (ALT), aspartate aminotransferase (AST), interleukin (IL)-17 and IL-23, level of Th17 cells, Th17/Treg, the expression of RORγt, Notch, hes family bHLH transcription factor 1 gene (HES1) and hes related family bHLH transcription factor with YRPW motif 1 (HEY1) protein in AIH group were greatly higher than those in control group (P<0.05), the contents of IL-10 and TNF-β, level of Treg cells, and level of Foxp3 protein were greatly lower(P<0.05); Compared with AIH group, the liver injury in L-WG group, M-WG group and H-WG group was improved, the contents of ALT, AST, IL-17 and IL-23, level of Th17 cells, Th17/Treg, the expression of RORγt, Notch, HES1 and HEY1 protein were greatly lower (P<0.05), the contents of IL-10 and TNF-β, level of Treg cells, and level of Foxp3 protein were greatly higher (P<0.05); VPA reversed the improvement effect of H-WG on AIH rats. Conclusions WG could promote Th17/Treg cell balance in AIH rats by down-regulating Notch signal pathway.

Key words: wogonin, Notch signal pathway, autoimmune hepatitis, Th17/Treg cell

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