Zhou Die, Zhong Jiang, Huang Yongguang, Cheng Yuxin
College of Liquor and Food Engineering, Key Laboratory of Fermentation Engineering and Biological Pharmacy of Guizhou Province, Guizhou University, Guiyang, Guizhou 550025, China.
Key Laboratory of Fermentation Engineering and Biological Pharmacy of Guizhou Province, Guiyang, Guizhou 550025, China.
Food Chem X. 2023 Jun 12;19:100747. doi: 10.1016/j.fochx.2023.100747. eCollection 2023 Oct 30.
Tratt distiller's grains ( DGs), the main by-product of wine processing, showed functional value and potential for high-value usage which benefited from their rich polyphenols. In this study, the free and bound polyphenols from DGs were extracted and their potential effect on modulating fecal microbiota was investigated using fecal fermentation. The free polyphenols (26.32-26.45 mg GAE/g) showed higher antioxidant activity compared to the bound polyphenols (8.76-9.01 mg GAE/g). The free and bound polyphenols significantly improved the fecal microbiota community structure and enhanced short chain fatty acids concentrations after the stimulated colonic fermentation for 24 h. Furthermore, the effect of DGs polyphenols on modulating fecal microbiota was primarily attributed to quercetin, catechin, kaempferol, cyanidin and baicalin. This research suggests that DGs are a promising source of natural antioxidants and prebiotic foods.
酒糟（DGs）是葡萄酒加工的主要副产品，因其富含多酚而具有功能价值和高附加值利用潜力。本研究提取了酒糟中的游离和结合多酚，并通过粪便发酵研究了它们对调节粪便微生物群的潜在作用。游离多酚（26.32 - 26.45毫克没食子酸当量/克）比结合多酚（8.76 - 9.01毫克没食子酸当量/克）表现出更高的抗氧化活性。在模拟结肠发酵24小时后，游离和结合多酚显著改善了粪便微生物群落结构并提高了短链脂肪酸浓度。此外，酒糟多酚对粪便微生物群的调节作用主要归因于槲皮素、儿茶素、山奈酚、花青素和黄芩苷。本研究表明，酒糟是天然抗氧化剂和益生元食品的一个有前景的来源。
