口腔生物医学 ›› 2023, Vol. 14 ›› Issue (2): 92-96.

• 论著 • 上一篇    下一篇

小檗碱对牙龈卟啉单胞菌的体外抑制作用研究

张璇,吴娟,孙卫斌*   

  1. 南京大学医学院附属口腔医院,南京市口腔医院牙周病科

  • 收稿日期:2022-09-26 修回日期:2023-02-22 出版日期:2023-06-25 发布日期:2023-07-31
  • 通讯作者: 孙卫斌 E-mail:wbsun@nju.edu.cn
  • 基金资助:
    国家自然科学基金

Inhibitory effect of berberine on P.gingivalis in vitro

  1. 1. Nanjing Stomatological Hospital, Medical School of Nanjing University
    2. Nanjing Stomatological Hospital,Medical School of Nanjing University
    3.
    4. Department of Periodontology, Nanjing Stomatological Hospital,Medical School of Nanjing University
  • Received:2022-09-26 Revised:2023-02-22 Online:2023-06-25 Published:2023-07-31

摘要: 目的:研究小檗碱(BBR)对牙龈卟啉单胞菌(Pg)的抑制作用,探讨其作用机制。方法:浓度梯度稀释法检测BBR抑制标准菌株Pg ATCC33277、高毒菌株Pg W83的最低抑菌浓度(MIC);通过血平板实验检测BBR对Pg ATCC33277、Pg W83最低杀菌浓度(MBC);MTT实验研究BBR对Pg ATCC33277细菌活力的影响;碱性磷酸酶(ALP)活性实验检测BBR对Pg ATCC33277细胞壁的影响;通过透射电镜(TEM)和扫描电镜(SEM)观察BBR对Pg ATCC33277菌体形态的影响。结果:BBR对Pg ATCC33277、Pg W83的MIC和MBC为15.625 μg/mL;在此浓度下,BBR可以使Pg ATCC33277细菌活力明显下降(P<0.05),12 h后ALP活性降低(P<0.05)。TEM及SEM镜下观察15.625 μg/mL BBR作用后的Pg ATCC33277菌体细胞变形、皱缩,失去正常细菌形态。结论:BBR对Pg ATCC33277、Pg W83有明显抑制作用,可能通过破坏细胞壁、细胞膜来降低细菌活力。

Abstract: Objective:To study the inhibitory effect of berberine (BBR) on Porphyromonas gingivali (Pg) and explore its mechanism. Methods:The minimum inhibitory concentration (MIC) of BBR on the inhibition of standard strains Pg ATCC33277 and hypervirulent strains Pg W83 was detected by concentration gradient dilution method. The minimum bactericidal concentration (MBC) of BBR on Pg ATCC33277 and Pg W83 was detected by blood plate experiment. The effect of BBR on bacterial activity of Pg ATCC33277 was studied by MTT. The effect of BBR on the cell walls of Pg ATCC33277 was determined by alkaline phosphatase activity. The effect of BBR on the morphology of Pg ATCC33277 was observed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Results:The MIC and MBC of BBR for Pg ATCC33277 and Pg W83 were 15.625 μg/mL. At this concentration, BBR can significantly reduce the bacterial activity of Pg ATCC33277 (P<0.05), reduce the activity of alkaline phosphatase after 12 hours (P<0.05). Pg ATCC33277 cells were deformed and wrinkled after BBR action and lost the normal bacterial morphology under SEM and TEM. Conclusions:BBR has a significant inhibitory effect on Pg ATCC33277 and Pg W83. It may reduce bacterial viability by disrupting cell walls and cell membranes.