Bai Ming, Huang Zhenfeng, Zheng Xiaoya, Hou Mingyong, Zhang Song
School of Life Science, South China Normal University, Guangzhou 510631, China.
Microorganisms. 2024 Aug 13;12(8):1654. doi: 10.3390/microorganisms12081654.
Polysaccharides derived from have been found to exhibit hypolipidemic activity in hyperlipidemic mice, but the mechanism by which they modulate intestinal flora is still unclear. Currently, this study aimed to investigate the regulatory effects of extracellular (EPTV) and intracellular polysaccharides from (IPTV) on the dysbiosis of intestinal flora in mice fed a high-fat diet (HFD). The results showed that the oral administration of polysaccharides significantly ameliorated lipid accumulation and steatosis in hepatocytes. The gut dysbiosis in the HFD mice was characterized by a decrease in abundance and diversity of bacteria and an increase in the Firmicutes/Bacteroidetes ratio. However, polysaccharides attenuated these changes and reduced the relative abundance of bile-salt-hydrolase (BSH)-producing bacteria, such as , , , and . It is noteworthy that polysaccharides also restored the disorganization of intestinal fungi in HFD mice, with EPTV treatment leading to a higher relative abundance of Basidiomycota and Ascomycota compared to IPTV. Additionally, polysaccharides enhanced the growth of butyrate-producing bacteria via the and pathways, accompanied by an increase in short-chain fatty acids (SCFAs), especially butyrate. IPTV also increased the expression of G-protein-coupled receptors 41 (GPR41) and 43 (GPR43) by 40.52% and 113.24% each, as compared to 62.42% and 110.28%, respectively, for EPTV. It is suggested that IPTV and EPTV have the potential to counteract hyperlipidemia-associated intestinal flora disorders and improve lipid metabolism.
已发现从[具体来源未提及]提取的多糖在高脂血症小鼠中具有降血脂活性,但其调节肠道菌群的机制仍不清楚。目前,本研究旨在探讨[具体来源未提及]的细胞外多糖(EPTV)和细胞内多糖(IPTV)对高脂饮食(HFD)喂养小鼠肠道菌群失调的调节作用。结果表明,口服[具体来源未提及]多糖可显著改善肝细胞中的脂质积累和脂肪变性。HFD小鼠的肠道菌群失调表现为细菌丰度和多样性降低,厚壁菌门/拟杆菌门比值增加。然而,[具体来源未提及]多糖减弱了这些变化,并降低了产生胆盐水解酶(BSH)的细菌的相对丰度,如[具体细菌种类未提及]、[具体细菌种类未提及]、[具体细菌种类未提及]和[具体细菌种类未提及]。值得注意的是,[具体来源未提及]多糖还恢复了HFD小鼠肠道真菌的紊乱,与IPTV相比,EPTV处理导致担子菌门和子囊菌门的相对丰度更高。此外,[具体来源未提及]多糖通过[具体途径未提及]和[具体途径未提及]途径促进产丁酸细菌的生长,同时短链脂肪酸(SCFAs)增加,尤其是丁酸。与EPTV分别增加62.42%和110.28%相比,IPTV还使G蛋白偶联受体41(GPR41)和43(GPR43)的表达分别增加40.52%和113.24%。提示IPTV和EPTV有潜力对抗高脂血症相关的肠道菌群紊乱并改善脂质代谢。