Department of Biology, Graduate School, Duzce University, Konuralp Campus, Duzce 81620, Turkey.
Department of Biology, Faculty of Art and Science, Duzce University, Konuralp Campus, Duzce 81620, Turkey.
FEMS Microbiol Lett. 2023 Jan 17;370. doi: 10.1093/femsle/fnad083.
In this study focused on probiotic properties of bacterium isolated from Herniaria glabra L. is a medicinal plant. The bacterium was isolated from H. glabra, and it was identified using the molecular method as Enterococcus mundtii AF-1 strain. Antibiotic sensitivity tests showed that AF-1 strain was sensitive to streptomycin, tobramycin, gentamicin, imipenem, erythromycin, and ciprofloxacin. The strain exhibited γ-haemolytic activity. These results show that the strain can be considered safe. The AF-1 strain showed inhibitory activity against some pathogens, including Bacillus subtilis, Klebsiella pneumoniae, and Yersinia pseudotuberculosis. Additionally, AF-1 strain exhibited high tolerance to low pH, pepsin, pancreatin, and bile salts. These properties showed that the strain may survival under the gastrointestinal conditions. The strain showed 40% DPPH free radical scavenging activity. The autoaggregation rate of the strain was 72.46% and the strain exhibited the high coaggregation rate (70.77% with Escherichia coli, and 63.78% with Listeria monocytogenesis). AF-1 strain showed 38.10% adhesion towards n-hexane, and 47.62% adhesion toward chloroform. It has been found to have moderate hydrophobicity. These results demonstrated the beneficial colonization ability of the strain in the gut. Furthermore, it was observed that living cells of AF-1 strain showed healing activity in the artificial wound area. Result of studies, it is seen that AF-1 strain might be excellent a probiotic candidate.
在这项专注于从 Herniaria glabra L.(一种药用植物)中分离出的细菌的益生菌特性的研究中。该细菌是从 H. glabra 中分离出来的,并通过分子方法鉴定为肠球菌 mundtii AF-1 菌株。抗生素敏感性测试表明,AF-1 菌株对链霉素、妥布霉素、庆大霉素、亚胺培南、红霉素和环丙沙星敏感。该菌株表现出 γ-溶血活性。这些结果表明该菌株可以被认为是安全的。AF-1 菌株对一些病原体表现出抑制活性,包括枯草芽孢杆菌、肺炎克雷伯菌和假结核耶尔森菌。此外,AF-1 菌株对低 pH 值、胃蛋白酶、胰酶和胆汁盐表现出高耐受性。这些特性表明该菌株可能在胃肠道条件下存活。该菌株表现出 40%的 DPPH 自由基清除活性。该菌株的自动聚集率为 72.46%,并表现出高共聚率(与大肠杆菌共聚 70.77%,与单核细胞增生李斯特菌共聚 63.78%)。AF-1 菌株对正己烷的粘附率为 38.10%,对氯仿的粘附率为 47.62%。它被发现具有中等疏水性。这些结果表明了该菌株在肠道中的有益定植能力。此外,还观察到 AF-1 菌株的活菌在人工伤口区域表现出愈合活性。研究结果表明,AF-1 菌株可能是一种优秀的益生菌候选菌株。