畜牧兽医学报 ›› 2015, Vol. 46 ›› Issue (10): 1875-1881.doi: 10.11843/j.issn.0366-6964.2015.10.022

• 临床兽医 • 上一篇    下一篇

蒲公英水提物对猪链球菌生物被膜体外干预作用

于文会1,许晶1,魏庆微1,姜晓文1,单安山2*   

  1. (1.东北农业大学动物医学学院,哈尔滨 150030;2.东北农业大学动物科学技术学院,哈尔滨 150030)
  • 收稿日期:2015-02-02 出版日期:2015-10-23 发布日期:2015-10-19
  • 通讯作者: 单安山,教授,博士生导师,E-mail:asshan@neau.edu.cn
  • 作者简介:于文会(1970-),男,吉林农安人,博士,教授,主要从事中药抗菌机制研究,E-mail:yuwenhui@neau.edu.cn
  • 基金资助:

    黑龙江省博士后基金(LBH-Z11243);北京市重点实验室开放课题(TCVW-201301)

Dandelion Aqueous Extract Affects Biofilm Formation by S.suis

YU Wen-hui1,XU Jing1,WEI Qing-wei1,JIANG Xiao-wen1,SHAN An-shan2*   

  1. (1.College of Veterinary Medicine,Northeast Agricultural University,Harbin 150030,China;2.College of Animal Science and Technology,Northeast Agricultural University,Harbin 150030,China)
  • Received:2015-02-02 Online:2015-10-23 Published:2015-10-19

摘要:

旨在观察蒲公英水提物对猪链球菌的抑菌作用及其对生物被膜形成的干预作用。通过水提法提取蒲公英的活性成分,利用高效液相色谱法检测蒲公英水提物中绿原酸的含量。通过微量肉汤稀释法分别测定蒲公英水提物和绿原酸对猪链球菌的最小抑菌浓度(MIC)和最小杀菌浓度(MBC);利用结晶紫染色(CV)和扫描电镜(SEM)检测蒲公英水提物和绿原酸对猪链球菌生物被膜形成的影响。结果表明,蒲公英水提物中绿原酸含量为5.833 mg•mL-1;蒲公英水提物对猪链球菌的MIC和MBC分别为62.5和250 mg•mL-1;绿原酸对猪链球菌MIC和MBC分别为2.5 和10 mg•mL-1。扫描电镜观察可见阴性对照组细菌镶嵌于生物被膜中,细菌周围有厚厚的黏液层,而蒲公英水提物和绿原酸均能使细菌生物被膜中的细菌数量和生物被膜的形态发生明显变化,细菌数量明显减少,未见有黏液成分和胞外基质,二者对猪链球菌生物被膜的形成均有抑制作用,均呈剂量依赖性。结果提示,蒲公英水提物对体外猪链球菌生物被膜形成具有抑制作用,并呈剂量依赖性;蒲公英水提物对体外猪链球菌生物被膜形成抑制作用的主要活性成分为绿原酸。

关键词: 猪链球菌, 生物被膜, 蒲公英, 绿原酸

Abstract:

The objective of this study was to investigate whether or not dandelion aqueous extract combated bacterial growth or affected biofilm formation by S.suis.In this study,the chlorogenic acid content of the dandelion aqueous extract was detected by high efficiency liquid chromatography (HPLC).Using a microdilution broth method,the MIC or MBC of dandelion aqueous extract or chlorogenic acid against S.suis was determined.The S.suis biofilm was determined by crystal violet staining.The S.suis biofilm was also examined by scanning electron microscopy.The results revealed that the chlorogenic acid content of the dandelion aqueous extract was 5.833 mg•mL-1.The MIC,MBC of dandelion aqueous extract to S.suis was 62.5,250 mg•mL-1,respectively.The MIC,MBC of chlorogenic acid to S.suis was 2.5,10 mg•mL-1,respectively.In the negative control,scanning electron microscopy analysis revealed that bacteria were embedded within the biofilms,and the thick slimes revolved around the bacteria.However,the biofilms were significantly affected following growth in the presence of dandelion aqueous extract or chlorogenic acid.Moreover,biofilm formation by S.suis was dose-dependently decreased by sub-MICs of dandelion aqueous extract or chlorogenic acid.Sub-MICs of dandelion aqueous extract or chlorogenic acid also diminished bacterial population by S.suis.There were no slimes and extracellular matrix components in sub-MICs of dandelion aqueous extract or chlorogenic acid treated s.suis biofilm.In summary,our study showed that sub-MICs of taraxaci herba aqueous extract significantly decreased biofilm formation by S.suis,and one of the active ingredients in dandelion aqueous extract was chlorogenic acid.

Key words: Streptococcus suis, biofilm, dandelion aqueous extrac, chlorogenic acid

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