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Liu, Zhengqi; Zhang, Zhihong; Qiu, Liang; Zhang, Fen; Xu, Xiongpeng; Wei, Hua; Tao, Xueying
Journal of dairy science, September 2017, 2017-Sep, 2017-09-00, 20170901, Letnik: 100, Številka: 9Journal Article
Exopolysaccharide (EPS) was extracted and purified from Lactobacillus plantarum WLPL04, which has been confirmed previously as a potential probiotic for its antagonistic and immune-modulating activity. It has a molecular weight of 6.61 × 104 Da, consisting of xylose, glucose, and galactose in an approximate molar ratio of 3.4:1.8:1. Microstructural studies demonstrated that the EPS appeared as a smooth sheet structure with many homogeneous rod-shaped lumps. The preliminary in vitro assays indicated that the EPS could significantly inhibit the adhesion of Escherichia coli O157:H7 to HT-29 cells in competition, replacement, and inhibition assays at a dose of 1.0 mg/mL, with an inhibition rate of 20.24 ± 2.23, 29.71 ± 1.21, and 30.57 ± 1.73%, respectively. Additionally, the EPS exhibited strong inhibition against biofilm formation by pathogenic bacteria, including Pseudomonas aeruginosa CMCC10104, E. coli O157:H7, Salmonella Typhimurium ATCC13311, and Staphylococcus aureus CMCC26003. Furthermore, the EPS showed good inhibitory activity against the proliferation of HT-29 cells. The characteristics and bioactivities of this EPS may make it a promising candidate in developing functional food.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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