Jiang Wenhao, Zhu Hongkang, Liu Chang, Hu Bin, Guo Yahui, Cheng Yuliang, Qian He
State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; Synergetic Innovation Center for Food Safety and Nutrition, Jiangnan University, Wuxi 214122, China.
School of Biotechnology, Jiangnan University, Wuxi 214122, China.
Int J Biol Macromol. 2022 Jun 1;209(Pt A):1327-1338. doi: 10.1016/j.ijbiomac.2022.04.131. Epub 2022 Apr 21.
Accumulating evidence suggests that the pathogenesis of alcoholic liver disease (ALD) is strongly correlated with abnormalities of the gut-liver axis. Echinacea purpurea polysaccharide (EPP) is a homogeneous polysaccharide, which has been shown to mitigate ALD. However, the effects of EPP on gut microbiome and consequently on hepatic metabolism have yet to be explored. In this study, the microbiome and metabolomics were combined to explore the effects of EPP on gut microbiota and hepatic metabolism, and the relationship between both was further revealed by Spearman correlation analysis. Results exhibited EPP reversed alcohol-induced disturbances in gut microbiota, evidenced by increased abundance of Muribaculaceae, Lactobacillus, and Bacteroides and decreased abundance of Escherichia_Shigella and Enterococcus. Besides, EPP promoted the production of n-butyric acid, a short-chain fatty acid that maintains the integrity of the intestinal barrier. Moreover, EPP improved alterations in hepatic metabolites, and characteristic metabolites such as Berberine and Ponasterone as well as key metabolic pathways, particularly Nitrogen metabolism, were identified. Furthermore, correlation analysis suggested significant associations between gut microbes and hepatic metabolites, which in turn confirmed EPP alleviated ALD via the gut-liver axis. Therefore, these findings elucidated in-depth mechanisms of EPP against ALD and provided a new target for intervention in alcohol-related diseases.
越来越多的证据表明,酒精性肝病(ALD)的发病机制与肠-肝轴异常密切相关。紫锥菊多糖(EPP)是一种均质多糖,已被证明可减轻ALD。然而,EPP对肠道微生物群以及由此对肝脏代谢的影响尚未得到探索。在本研究中,将微生物组学和代谢组学相结合,以探索EPP对肠道微生物群和肝脏代谢的影响,并通过Spearman相关性分析进一步揭示两者之间的关系。结果显示,EPP逆转了酒精引起的肠道微生物群紊乱,表现为毛螺菌科、乳酸杆菌属和拟杆菌属丰度增加,而埃希氏菌属-志贺氏菌属和肠球菌属丰度降低。此外,EPP促进了短链脂肪酸正丁酸的产生,正丁酸可维持肠道屏障的完整性。此外,EPP改善了肝脏代谢物的变化,并鉴定出了小檗碱和蜕皮甾酮等特征性代谢物以及关键代谢途径,尤其是氮代谢。此外,相关性分析表明肠道微生物与肝脏代谢物之间存在显著关联,这反过来证实了EPP通过肠-肝轴减轻了ALD。因此,这些发现阐明了EPP对抗ALD的深入机制,并为酒精相关疾病的干预提供了新的靶点。
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