夹江石斛水提取物对金黄色葡萄球菌的抑菌作用及机制研究

伏俊桦1,邓晓东2,周 莉1,李陈杰1,郭紫薇1,彭宏浩1,周瑞琪1,张薇薇1*

1.成都医学院,四川成都 6105002.四川国际旅行卫生保健中心,四川成都 610041

摘要:探讨夹江石斛水提取物(DJWEs)对金黄色葡萄球菌的抑菌作用及抑菌机制。采用96孔板微量肉汤稀释法以及平板培养法检测DJWEs对金黄色葡萄球菌的最小抑菌浓度(MIC),并通过测定培养液中碱性磷酸酶(AKP)、电导率、大分子物质吸光度(OD)值以及菌体DAPI的荧光强度,研究DJWEs对金黄色葡萄球菌细胞壁通透性、细胞膜通透性和核酸合成的影响。DJWEs对金黄色葡萄球菌的MIC浓度为70 mg/mL;经DJWEs处理后,金黄色葡萄球菌培养液中AKP的含量明显增高(P0.05),但电导率和大分子物质的OD值差异无统计学意义(P0.05),而DAPI染色后核酸荧光强度有显著变化(P0.01)。DJWEs对金黄色葡萄球菌有较强的抑菌作用,抑菌机理可能涉及影响金黄色葡萄球菌的细胞壁通透性和核酸DNARNA合成。

关键词:夹江石斛水提取物;金黄色葡萄球菌;抑菌作用;抑菌机制

中图分类号:TS201.6 文献标识码:A 文章编号:1674-506X202002-0001-0005


Studies on the Antibacterial Activity and Mechanism of the Water Extracts from Dendrobium jiajiangense on Staphylococcus aureus

FU Jun-hua1, DENG Xiao-dong2, ZHOU Li1, LI Chen-jie1, GUO Zi-wei1, PENG Hong-hao1, ZHOU Rui-qi1, ZHANG Wei-wei1*

1.Chengdu Medical College, Chengdu Sichuan 610500, China;

2.Sichuan International Travel Healthcare Center, Chengdu Sichuan 610041, China

AbstractTo study the antibacterial activity and mechanism of the Dendrobium jiajiangense water extracts (DJWEs) on Staphylococcus aureus. The 96-well plate 2-fold dilution method was adopted to determine the minimal inhibitory concentrations (MIC). The detection of alkaline phosphatase (AKP), electrical conductivity and OD value, and DAPI staining assay were used to primarily study the antibacterial mechanism of DJWEs against Staphylococcus aureus. The MIC was 70 mg/mL. After treated with DJWEs, the AKP and DAPI staining of Staphylococcus aureus had significant differences. The significant antibacterial activity of DJWEs was found on Staphylococcus aureus. The antibacterial mechanism of DJWEs may involve in influencing cell wall permeability and nucleic acid including DNA and RNA synthesis of Staphylococcus aureus.

KeywordsDendrobium jiajiangense water extracts; Staphylococcus aureus; antibacterial activity; antibacterial mechanism

doi10.3969/j.issn.1674-506X.2020.02-001


收稿日期:2019-11-01

基金项目:四川省教育厅川菜发展研究中心科研项目(CC19Z28);四川省中医药管理局中医药科学技术研究专项(2016Q074);

成都医学院2016年国家级大学生创新训练计划项目(201613705014);成都医学院2017年省级大学生创新训练计划

项目(201713705064

作者简介:伏俊桦(1997-),女,本科。研究方向:食品安全。

*通讯作者


引文格式:伏俊桦,邓晓东,周莉,.夹江石斛水提取物对金黄色葡萄球菌的抑菌作用及机制研究[J].食品与发酵科技,2020,56(2):1-4,9.

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