四君子汤及其单味药水煎液对脾虚大鼠肠道菌群的调节作用

目的:探讨四君子汤及其单味药(人参、白术、茯苓、炙甘草)水煎液对脾虚大鼠肠道菌群的调节作用。方法:正常大鼠随机分为空白组、模型组、整肠生颗粒组、四君子汤组及各单味药组,连续10 d灌胃给予番泻叶水煎液塑造脾虚模型(空白组给予蒸馏水),再连续7 d分别给予相应药物治疗(空白组、模型组给予蒸馏水)。收集造模前(第0天),造模结束(第11天)和治疗结束(第18天)的粪便样品,经硫酸酸化、乙醚萃取处理后采用气相色谱法分析样品中短链脂肪酸含量的变化,利用16S rDNA-聚合酶链式反应-变性梯度凝胶电泳(PCR-DGGE)技术分析粪便样品中肠道菌群结构的变化。结果:造模结束时,与空白组比较,各给药组大鼠粪便短链脂肪酸含量、肠道菌群多样性指数和相似性系数均显著下降(P 0. 05,P 0. 01),表明脾虚模型造模成功。治疗结束时,与模型组比较,白术组大鼠粪便短链脂肪酸含量、肠道菌群多样性指数和相似性系数均极显著升高(P 0. 01),四君子汤组、人参组和茯苓组部分指标极显著升高、部分指标显著升高(P 0. 05,P 0. 01);而炙甘草组仅多样性指数有所升高(P 0. 05),粪便短链脂肪酸含量和相似性系数则均无显著性差异。结论:四君子汤对脾虚大鼠肠道菌群的恢复调节时,白术可能发挥主要作用,人参、茯苓也发挥了一定作用。

Regulatory Effect of Sijunzi Tang and Its Single Herbs on Intestinal Flora in Rats with Spleen Deficiency

Objective:To investigate the regulatory effect of Sijunzi Tang(SJZT) and its single herbs(Ginseng Radix et Rhizoma, Glycyrrhizae Radix et Rhizoma Praeparata cum Melle, Atractylodis Macrocephalae Rhizoma and Poria) on intestinal flora in spleen-deficient rats. Method:Normal rats were randomly divided into the blank group, model group, Zhengchangsheng granules group, SJZT group and each single herb group, rats were orally administered Sennae Folium decoction to induce diarrhea for ten consecutive days to establish a spleen-deficient model(distilled water for the blank group), then treated with the corresponding drugs for seven consecutive days(distilled water for the blank group and the model group). Fresh feces were collected on pre-modeling(0^th day), post-modeling(11^th day), and post-treatment(18^th day). Short-chain fatty acids(SCFAs) in feces were acidified by sulphuric acid and extracted by diethyl ether, then determined by gas chromatography. The structural change(diversity and similarity) of intestinal flora in feces was analyzed by 16S rDNA-polymerase chain reaction(PCR)-denaturing gel gradient electrophoresis(DGGE) technique. Result:Compared with blank group, the contents of SCFAs as well as diversity and similarity indexes of intestinal flora in feces of all administered groups were significantly decreased on the 11^th day(P<0.05, P<0.01), this indicated that the spleen-deficient model was successfully constructed. On the 18^th day, compared with model group, the contents of SCFAs as well as diversity and similarity indexes of intestinal flora in feces of Atractylodis Macrocephalae Rhizoma group were significantly increased(P<0.01), these indexes in feces of SJZT group, Ginseng Radix et Rhizoma group and Poria group were significantly increased(P<0.05, P<0.01), while Glycyrrhizae Radix et Rhizoma Praeparata cum Melle group only increased diversity index of intestinal flora(P<0.05). Conclusion:Ginseng Radix et Rhizoma, Atractylodis Macrocephalae Rhizoma and Poria are the single herbs responsible for the regulatory effect of SJZT on intestinal flora in spleen-deficient rats, and Atractylodis Macrocephalae Rhizoma may play a major role.