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Synergistic Antibacterial Effect of the Combination of epsilon-Polylysine and Nisin against Enterococcus faecalis

文献类型： 外文期刊

作者： Liu, Fang 1 ; Liu, Mei 1 ; Du, Lihui 3 ; Wang, Daoying 1 ; Geng, Zhiming 1 ; Zhang, Muhan 1 ; Sun, Chong 1 ; Xu, Xiaoxi 2 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Prod Proc, Nanjing 210014, Jiangsu, Peoples R China

2.Northeast Agr Univ, Coll Food Sci, Harbin 150030, Peoples R China

3.Nanjing Univ Finance & Econ, Coll Food Sci & Engn, Nanjing 210046, Jiangsu, Peoples R China

期刊名称：JOURNAL OF FOOD PROTECTION （ 影响因子：2.077； 五年影响因子：2.224 ）

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收录情况： SCI

摘要： This study evaluated the antibacterial effect of the combination of epsilon-polylysine (epsilon-PL) and nisin against Enterococcus faecalis strains. The combination of epsilon-PL and nisin showed synergistic antibacterial activity against three Enterococcus strains. Scanning electron microscopy and a membrane permeability assay revealed that the combined treatment with epsilon-PL and nisin synergistically damaged the cell morphology of E. faecalis strain R612Z1 cells. Both epsilon-PL and nisin can dissipate the transmembrane electric potential of E. faecalis R612Z1 cells, but these peptides did not affect the transmembrane pH gradient. The combination of epsilon-PL and nisin can produce a high reactive oxygen species level in E. faecalis R612Z1 cells. The results indicated that the uptake of epsilon-PL into cells was promoted through nisin and that the combination of epsilon-PL and nisin could produce a high reactive oxygen species level in E. faecalis R612Z1 cells, leading to cell growth inhibition.

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