久泻灵颗粒对脾肾阳虚型溃疡性结肠炎大鼠结肠髓样分化因子88和白细胞介素受体相关激酶1表达的影响
2017-09-07刘香玉刘永华李海龙刘峰林程小丽吴玉泓
刘香玉 刘永华 李海龙 刘峰林 程小丽 吴玉泓



摘要:目的 观察久泻灵颗粒对脾肾阳虚型溃疡性结肠炎(UC)大鼠结肠髓样分化因子88(MyD88)和白细胞介素受体相关激酶1(IRAK1)表达的影响,探讨其作用机制。方法 采用复合方法制作动物模型。90只Wistar大鼠随机分为空白组、模型组、阳性药组和久泻灵高、中、低剂量组,各给药组给予相应药物灌胃。RT-qPCR、免疫组化和Western blot分别检测MyD88、IRAK1基因和蛋白的表达。结果 与空白组比较,模型组大鼠MyD88、IRAK1基因和蛋白表达均增强(P<0.01);与模型组比较,各给药组大鼠MyD88、IRAK1基因和蛋白表达均减弱(P<0.01),久泻灵颗粒高剂量组最为明显。结论 久泻灵颗粒可抑制MyD88、IRAK1的表达,影响MyD88信号通路的传导,阻滞下游炎症因子的释放,从而达到治疗脾肾阳虚型UC的目的。
关键词:久泻灵颗粒;溃疡性结肠炎;脾肾阳虚;髓样分化因子88;白细胞介素受体相关激酶1;大鼠
DOI:10.3969/j.issn.1005-5304.2017.09.013
中图分类号:R285.5 文献标识码:A 文章编号:1005-5304(2017)09-0051-04
Effects of Jiuxieling Granules on Expressions of MyD88 and IRAK1 in Ulcerative Colitis Rats with Spleen-Kidney Yang Deficiency LIU Xiang-yu1, LIU Yong-hua1, LI Hai-long1,2, LIU Feng-lin1, CHENG Xiao-li1, WU Yu-hong1,2 (1. Gansu University of Chinese Medicine, Lanzhou 730000, China; 2. Gansu Province Chinese Medicine New Products Engineering Laboratory, Lanzhou 730000, China)
Abstract: Objective To observe the effects of Jiuxieling Granules on the expressions of MyD88 and IRAK1 in ulcerative colitis model rats with spleen-kidney yang deficiency; To discuss its mechanism of action. Methods Animal models were established by compound methods. 90 Wistar rats were randomly divided into blank group, model group, positive medicine group, and Jiuxieling Granules high-, medium-, and low-dose groups. Each administration group was given relevant medicine for gavage. RT-qPCR, SP immunohistochemistry and Western blot were used to detect mRNA and proteins of MyD88 and IRAK1 in colon tissues. Results Compared with the blank group, mRNA and proteins of MyD88 and IRAK1 in the model group increased (P<0.01). Compared with the model group, mRNA and proteins of MyD88 and IRAK1 in each administration group decreased (P<0.01), especially in Jiuxieling Granules high-dose group. Conclusion Jiuxieling Granules can reduce the expressions of MyD88 and IRAK1, and then influence the transmission of MyD88 signaling pathway and block the release of downstream inflammatory factors to achieve the result of treating ulcerative colitis with spleen-kidney yang deficiency.
Key words: Jiuxieling Granules; ulcerative colitis; spleen-kidney yang deficiency; MyD88; IRAK1; rats
潰疡性结肠炎(ulcerative colitis,UC)是一种反复发作的慢性非特异性炎症性肠病(inflammatory bowel disease,IBD),属于中医学“久痢”“久泻”范畴,临床常见腹痛腹泻伴里急后重、黏液脓血便等症状,脾肾阳虚型UC在临床最为常见[1],其病因尚不明确,目前认为与自身免疫密切相关[2]。有研究显示,
基金项目:国家自然科学基金(81260520)
通讯作者:吴玉泓,E-mail:172924249@qq.com
TLRs/MyD88信号通路在UC发病中起重要作用[3]。本研究选择MyD88依赖信号通路中的髓样分化因子88(MyD88)和白细胞介素受体相关激酶1(IRAK1)作为效应指标,观察其在脾肾阳虚型UC模型大鼠结肠组织基因和蛋白的表达。久泻灵颗粒是以四神丸合理中丸为主方,功效温补脾肾。课题组前期研究表明,久泻灵颗粒对大鼠结肠黏膜局部过激的免疫炎症反应有治疗作用,其治疗效果与治疗时间呈正相关[4-5]。在此基础上,本实验就不同剂量久泻灵颗粒治疗脾肾阳虚型UC的效果,研究其药物量效关系。……
