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中国应用生理学杂志 ›› 2017, Vol. 33 ›› Issue (5): 422-425.doi: 10.12047/j.cjap.5525.2017.102

• 研究论文 • 上一篇    下一篇

蒲公英多糖对溃疡性结肠炎大鼠IL-6/STAT3信号通路的影响

王倩, 别玉龙, 王豆, 范文涛   

  1. 陕西中医药大学, 咸阳 712046
  • 收稿日期:2016-11-21 修回日期:2017-06-21 出版日期:2017-09-28 发布日期:2018-06-19
  • 通讯作者: 范文涛,Tel:029-38185297;E-mail:1404113637@qq.com E-mail:1404113637@qq.com
  • 基金资助:
    国家自然科学基金项目(81202847,81470188,81673832);陕西省教育厅项目(14JK1197);陕西省中医药管理局项目(13-LC073)

Effects of Dandelion polysaccharide on IL-6/STAT3 signaling pathway in ulcerative colitis rats

WANG Qian, BIE Yu-long, WANG Dou, FAN Wen-tao   

  1. Shanxi University of Chinese Medicine, Xianyang 712046, China
  • Received:2016-11-21 Revised:2017-06-21 Online:2017-09-28 Published:2018-06-19
  • Supported by:
    国家自然科学基金项目(81202847,81470188,81673832);陕西省教育厅项目(14JK1197);陕西省中医药管理局项目(13-LC073)

摘要: 目的:观察蒲公英多糖对溃疡性结肠炎大鼠模型IL-6/STAT3信号通路的调控作用。方法:清洁级SD大鼠40只,雌雄各半,随机分为4组(n=10):空白组、模型组、阳性对照组、蒲公英多糖组。采用2,4,6-三硝基苯磺酸(TNBS)诱导结肠炎大鼠模型,阳性对照组采用美沙拉嗪10 mg/kg·d灌胃,蒲公英多糖组采用蒲公英多糖10 mg/kg·d灌胃,治疗4周后处死,观察大鼠结肠粘膜病理改变,检测大鼠血清白介素-6(IL-6)含量、结肠髓过氧化物酶(MPO)、白介素-6受体(sIL-6Rα)、糖蛋白130(gp130)、转录活化因子3(STAT3)、IL-6 mRNA表达。结果:与正常组比较,模型组大鼠血清IL-6含量明显升高(P<0.01),MPO阳性密度明显增高(P<0.01),sIL-6Rα、gp130含量明显增高(P<0.01),肠组织STAT3、IL-6 mRNA相对表达量明显增高(P<0.01);与模型组比较蒲公英多糖组、美沙拉嗪组大鼠血清IL-6含量明显降低(P<0.01),MPO阳性密度明显降低(P<0.01),sIL-6Rα、gp130含量明显降低(P<0.01),肠组织STAT3、IL-6 mRNA相对表达量与模型组比较明显降低(P<0.05)。结论:蒲公英多糖能够降低溃疡性结肠炎大鼠IL-6水平,下调IL-6/STAT3通路中sIL-6Rα、gp130蛋白表达量,进而下调大鼠肠组织STAT3、IL-6 mRNA的转录水平,缓解结肠组织的炎症状态,保护和修复粘膜组织,起到治疗溃疡性结肠炎的作用。

关键词: 蒲公英多糖, 炎症性肠病, 大鼠模型, IL-6/STAT3信号通路

Abstract: Objective: To investigate the effects of dandelion polysaccharide on IL-6/STAT3 signaling pathway in rats with ulcerative colitis.Methods: Forty SD rats were randomly divided into four groups (n=10):control group, model group, positive control group and dandelion polysaccharide group. The ulcerative colitis model was established by treated with 2,4,6-trinitrobenzene sulfonic acid (TNBS). The positive control group was treated with mesalazine 10 mg/kg·d and dandelion polysaccharide group was treated with dandelion polysaccharide 10 mg/kg·d. The levels of interleukin -6(IL-6), colonic myeloperoxidase (MPO) and interleukin-6 receptor (sIL-6Rα) were measured after 4 weeks of treatment. The pathological changes of colonic mucosa were observed in rats. The gene expressions of glycoprotein 130 (gp130), transcriptional activator3(STAT3) and IL-6 were detected.Results: Compared with the normal control group, the level of serum IL-6 in the model group was significantly higher than that in the control group (P<0.01). Compared with the model group, the serum levels of IL-6 in the dandelion polysaccharide group and the methacetin group were significantly decreased (P<0.01). Compared with the model group, the MPO positive density of the rats in the dandelion polysaccharide group and the methacetin group was significantly lower than that in the normal group (P<0.01). Compared with the model group, the levels of sIL-6Rα and gp130 in the rats were significantly lower than those in the model group (P<0.01). Compared with the model group, the expressions of STAT3 and IL-6 mRNA in the intestinal tissue of the rats in the dandelion polysaccharide group and the methacetin group were decreased significantly.Conclusion: Dandelion polysaccharide can decrease the level of IL-6 in rats with ulcerative colitis, regulate the expression of sIL-6Rα and gp130 protein in IL-6/STAT3 pathway, and then down-regulate the expressions of STAT3 and IL-6 mRNA in intestinal tissue of rats, alleviate the colon inflammation state, protect and repair the mucosal tissue. Dandelion polysaccharide plays a role in the treatment of ulcerative colitis.

Key words: dandelion polysaccharide, inflammatory bowel disease, rat model, IL-6/STAT3 signaling pathway, regulation

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