摘要
目的基于TGF-β1/Smads通路及炎性因子探讨湿生扁蕾呫吨酮(GPX)联合益生菌干预结肠炎癌转化的机制。方法将90只大鼠采用随机数字表法分为正常组、模型组[饮用右旋糖酐硫酸钠(DSS)3 d]和给药组。其中,模型组又分为炎症期组、炎癌前期组[注射二甲基肼(DMH)4周]、炎癌中期组(注射DMH 13周)、炎癌末期组(注射DMH 21周);给药组是在炎癌末期组的基础上边建模边给药且根据所给药物再分组,即饮用DSS 3 d,在饮用DSS的第1天就开始灌胃各组药物,每日1次,持续8周,分别为GPX 69.3 mg/kg(GPX组)、益生菌400 mg/kg(益生菌组)、GPX 69.3 mg/kg+益生菌400 mg/kg(联合组)、沙利度胺13.5 mg/kg(沙利度胺组)。对各组疾病活动指数(DAI)、结肠长度和湿质量指数进行比较;观察大鼠结肠瘤体特征;HE染色观察结肠病理变化;Western blot和酶联免疫吸附试验分别检测转化生长因子(TGF)-β1,Smad4,Smad7和白细胞介素(IL)-6、肿瘤坏死因子(TNF)-α表达。结果与炎癌末期组比较,各给药组结肠长度增加,结肠壁厚、湿质量指数与瘤体最大直径降低,TGF-β1和Smad4蛋白表达水平升高,Smad7、IL-6、TNF-α水平降低,GPX组与联合组DAI得分降低(P<0.05),GPX组、益生菌组和联合组的肠黏膜层结构和形态改善,结肠隐窝结构与杯状细胞数量增加;与益生菌组和GPX组比较,联合组结肠壁厚、结肠湿质量指数、瘤体数量降低,TGF-β1和Smad4蛋白表达水平升高,IL-6、TNF-α水平降低(P<0.05)。结论GPX和益生菌联用可抑制结肠炎癌转化,其作用机制可能与调控TGF-β1/Smads通路和抑制IL-6、TNF-α表达有关。
Objective To investigate the mechanism of Gentianopsis paludosa xanthone(GPX)combined with probiotics in the intervention of colon inflammation-tumor transformation in rats by regulating TGF-β1/Smads pathway and inflammatory factors.Methods Ninety rats were divided into the normal group,the model group[drinking sodium dextran sulfate(DSS)for 3 days]and the intervention group by random number table method.The model group was subdivided into the inflammatory stage group,the pre-inflammatory cancer group(DMH injection for 4 weeks),the intermediate inflammatory cancer group(DMH injection for 13 weeks)and the advanced inflammatory cancer group(DMH injection for 21 weeks).The administration group was subdivided into the groups(after the first day of drinking DSS,drugs for each group were given by gavage once a day for 8 weeks)on the basis of the advanced inflammatory cancer group,including the GPX group(GPX 69.3 mg/kg),the probiotic group,the combined group(GPX+probiotics 400 mg/kg)and the thalidomide group(thalidomide 13.5 mg/kg).The disease activity index(DAI),colon length and wet mass index were compared between all groups.Characteristics of colon tumors were observed,and pathological changes of colon were observed by HE staining.The expression levels of transforming growth factor(TGF)-β1,Smad4,Smad7,interleukin(IL)-6 and tumor necrosis factor(TNF)-αwere detected by Western blot assay and enzyme-linked immunosorbent assay,respectively.Results Compared with the advanced inflammatory cancer group,the administration groups showed an increase in colon length,the expression levels of TGF-β1 and Smad4 protein,a decrease in colon wall thickness,wet mass index,maximum tumor diameter,the levels of Smad7,IL-6,TNF-α,and DAI score decreased in the GPX group and the combined group(P<0.05).The structure and morphology of intestinal mucosa were improved in the GPX group,the probiotic group and the combination group,and the structure of colonic crypt and goblet cell number were increased.Compared with the probiotic group and the GPX group,the colon wall thickness,colon wet mass index and tumor number were decreased,the protein expression levels of TGF-β1 and Smad4 were increased,and levels of IL-6 and TNF-αwere decreased in the combination group(P<0.05).Conclusion GPX combined with probiotics could inhibit the transformation of colon inflammation-tumor,and the mechanism may be related to the regulation of TGF-β1/Smads pathway and the inhibition of pro-inflammatory factors of IL-6 and TNF-α.
作者
卢年华
靳展洪叶
张茜
张萌
李俊珂
赵慧巧
张永鹏
LU Nianhua;JIN Zhanhongye;ZHANG Qian;ZHANG Meng;LI Junke;ZHAO Huiqiao;ZHANG Yongpeng(College of Traditional Chinese Medicine,Hebei North University,Zhangjiakou 075000,China)
出处
《天津医药》
CAS
2024年第2期136-141,共6页
Tianjin Medical Journal
基金
河北省自然科学基金资助项目(H2020405027,H2020405010)
河北省高等学校科学技术研究项目(QN2020118)
河北省属高校基本科研业务项目(JYT2021036,JYT2019009)。
