School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China.
Probiotics and Life Health Institute, Lanzhou University, Lanzhou 730000, PR China.
Food Funct. 2024 Feb 19;15(4):2022-2037. doi: 10.1039/d3fo05337g.
Probiotics are known for their beneficial effects on improving intestinal function by alleviating the gut microbial diversity. However, the influences of antioxidant lactic acid bacteria (LAB) and anti-inflammatory (CB) on ameliorating enteritis remain unclear. In this study, we investigated the effects of the antioxidant strain AS21 and CB alone, or in combination on intestinal microbiota, barrier function, oxidative stress and inflammation in mice with DSS-induced colitis. All probiotic treatments relieved the pathological development of colitis by improving the integrity of the intestinal mucosal barrier and the length of the colon. The probiotics also suppressed inflammation and oxidative stress by improving gut short-chain fatty acids and inhibiting the p38-MAPK/NF-κB pathway in colon tissues. According to the meta-network analysis, three distinct modules containing sensitive OTUs of the gut bacterial community specific to the control, DSS and DSS + probiotics groups were observed, and unlike the other two modules, and dominated the sensitive OTUs in the DSS + probiotics group. In addition, administration of the present probiotics particularly increased antioxidant and anti-inflammatory microbes , , and . Furthermore, combined probiotic strain treatment showed a more stable anti-colitis effect than a single probiotic strain. Collectively, the present probiotics exhibited protective effects against colitis by suppressing the inflammation and oxidative damage in the colon, improving the gut microbiota and their functions, and consequently preventing the gut leak. The results indicate that the combination of the antioxidant properties of LAB and the anti-inflammatory properties of CB as nutritional intervention and adjuvant therapy could be an effective strategy to prevent and alleviate colitis.
益生菌通过缓解肠道微生物多样性来改善肠道功能而闻名。然而,抗氧化乳酸菌(LAB)和抗炎(CB)对改善肠炎的影响仍不清楚。在这项研究中,我们研究了抗氧化菌株 AS21 以及单独或联合使用对 DSS 诱导的结肠炎小鼠肠道微生物群、屏障功能、氧化应激和炎症的影响。所有益生菌治疗均通过改善肠黏膜屏障完整性和结肠长度来缓解结肠炎的病理发展。益生菌还通过改善肠道短链脂肪酸并抑制 p38-MAPK/NF-κB 通路来抑制炎症和氧化应激。根据元网络分析,观察到含有控制、DSS 和 DSS+益生菌组肠道细菌群落敏感 OTU 的三个不同模块,与其他两个模块不同,和 在 DSS+益生菌组中占主导地位。此外,本研究中益生菌的给药特别增加了抗氧化和抗炎微生物 、 、 。此外,联合益生菌菌株治疗比单一益生菌菌株治疗表现出更稳定的抗结肠炎作用。总之,本研究所用益生菌通过抑制结肠的炎症和氧化损伤、改善肠道微生物群及其功能来防止肠道渗漏,从而对结肠炎表现出保护作用。结果表明,LAB 的抗氧化特性和 CB 的抗炎特性作为营养干预和辅助治疗的结合可能是预防和缓解结肠炎的有效策略。
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