中文摘要
肠易激综合症(D-IBS)是临床最常见的功能性肠病,对患者造成极大的生理和精神痛苦。其发病机制虽未明确,但近期研究发现,肠道微生物普遍参与了D-IBS的发生、发展。本课题即以“补虚回阳、脾肾同调”立法的临床效方附子理中汤为干预手段,以正常组、D-IBS模型组和附子理中汤治疗组大鼠为研究对象,应用宏基因组学( metagenome)技术,比对组间肠道微生物物种特点及代谢通路差异,寻找与D-IBS发病相关的特异性肠道微生物种属、二级代谢通路及附子理中汤起效的主要代谢通路;同时结合组间细胞免疫和体液免疫相关因子的变化,探讨肠道微生物对免疫学相关指标的影响及其对应关系。旨在从肠道微生态和免疫学角度探讨附子理中汤治疗D-IBS的显效规律,揭示“补虚回阳、脾肾同调” 治疗D-IBS的科学内涵,为中医药治疗D-IBS的推广和应用提供依据。
英文摘要
Irritable bowel syndrome-diarrehea (D-IBS) is the most common clinical functional bowel disorders, cause great physical and mental pain to the patients.Its pathogenesis is not clear, but recent studies have shown that, the intestinal microbial generally involved in the occurrence and development of D-IBS.This study present Fuzilizhong Decoction for intervention which is the clinical effective prescription of "restore yang, spleen and kidney homology" legislative, with the normal group, D-IBS model group and Aconite Decoction treatment group rats as the research object, the application of metagenomics Technology, ratio of intestinal microbial species differences in characteristics and metabolism access in each group, and find the specific intestinal microbial species correlation with the onset of D-IBS, level two of metabolic pathway and the main metabolic pathway of Fuzilizhong Decoction ;at the same time,combining the variations among the groups of cellular immunity and humoral immune related factors, to explore the effect of intestinal microbial indexes related to immunological and correspondence.To explore the effect of FuziLizhong Decoction in the treatment of D-IBS from the intestinal microecology and immunology, reveals the scientific connotation of "tonifying yang, spleen and kidney homology" treatment of D-IBS, and provide the basis for the popularization and application of the TCM treatment of D-IBS.
结题摘要
肠易激综合症(D-IBS)是临床最常见的功能性肠病,对患者造成极大的生理和精神痛苦。其发病机制虽未明确,但近期研究发现,肠道微生物普遍参与了D-IBS的发生、发展。本课题即以“补虚回阳、脾肾同调”立法的临床效方附子理中汤为干预手段,以正常组、D-IBS模型组和附子理中汤治疗组大鼠为研究对象,应用宏基因组学( metagenome)技术,比对组间肠道微生物物种特点发现,模型组大鼠拟杆菌门的物种丰富度下降,而厚壁菌门、变形菌门的物种丰富度是升高的,差异上有统计学意义。中药组大鼠与模型组大鼠相比,在拟杆菌门有一定差异,比正常组有增加。结果显示,IBS大鼠存在不同程度的肠道菌群失调,表现为双歧杆菌属等厌氧菌明显减少,大肠埃希氏菌、肠球菌属、肠杆菌属等需氧菌以及一些条件致病菌有不同程度增多。经过中药干预后,双歧杆菌、Bacteroides_vulgatus、Bacteroides_finegoldii等拟杆菌均有增多。表明附子理中汤对大鼠肠道菌群有调节作用。将模型组45361 个显著差异基因与NOG 库及KEGG 库比对,得到其功能注释的信息。在eggNOG 的水平上分析差异基因的功能信息,对注释到COG 功能上的基因数进行统计,结果显示,较多的基因执行G(碳水化合物转运和代谢) ,E(氨基酸转运和代谢),L(复制、重组和修复)、R (一般功能预测) 和C (能量的产生和转换) 等功能。将差异表达的基因放到生物通路中进行综合分析,分析功能性变异对生物通路的影响程度及规律,进一步对显著差异基因进行KEGG分析,在KEGG代谢通路的二级分类水平上,统计其相应分类下的基因相对丰度,结果显示,较多的基因出现在细胞转化和细胞进程、基础代谢、和有机系统等信号转导代谢途径。提示肠道氨基酸和核苷酸代谢、次生产物的生物合成障碍等通路可以促进腹泻的发生。从免疫角度的研究结果提示附子理中汤可以提升细胞免疫功能,改善体液免疫,对协调D-IBS的免疫失衡状态是有积极作用的。本研究从肠道微生态和免疫学角度探讨附子理中汤治疗D-IBS的显效规律,揭示“补虚回阳、脾肾同调” 治疗D-IBS的科学内涵,为中医药治疗D-IBS的推广和应用提供依据。
