【摘要】 目的:研究五倍子不同提取组分对5种主要与致龋密切相关的生物膜细菌生长抑制及清除的作用,为临床试验提供药物作用的浓度范围。方法:选择与龋病发生密切相关的5种口腔细菌,五倍子不同提取组分为五倍子多酚性化合物(GCE)、五倍子B(GCE-B,300ml/L乙醇提取物1.80g/L)、五倍子C(GCE-C,500ml/L丙酮提取物4.67g/L)、五倍子D(GCE-D,1000ml/L丙酮提取物0.80g/L)、没食子酸、没食子酸甲酯。扫描电镜观察观察口腔细菌在MBECTM-Device上形成细菌生物膜的能力和形成情况;测定五倍子不同组分对5种口腔细菌的最小抑菌浓度MIC(minimalinhibitoryconcentration)和对5种细菌生物膜的最小生物膜清除浓度(minimalbiofilmeradicationconcentration,MBEC)。结果:在MBECTM-Device提供的桩钉表面上口腔细菌能形成良好的生物膜结构,不同时段取出的样本可以观察到细菌从定植黏附到生物膜形成以及成熟生物膜结构。五倍子不同提取组分对5种口腔浮游细菌均有良好的抑制作用。五倍子多酚性化合物、五倍子B对5种口腔生物膜细菌抑制作用的效果最好,其次为五倍子C和五倍子D,没食子酸和没食子酸甲酯对口腔生物膜细菌的抑制作用较差。五倍子不同提取组分对5种口腔细菌生物膜的MBEC是MIC的2～16倍左右。结论:中药五倍子不同提取组分中五倍子多酚性化合物和五倍子B对口腔生物膜细菌有很好的抑制和清除效应,MBEC比MIC能更客观的反映药物作用的浓度范围。更多还原

【Abstract】 Objective: To assay minimal biofilm eradication concentration (MBEC) of various extraction compounds from Galla Chinensis to 5 oral bacterial biofilms, and then to set up traditional Chinese medicine empirical study methods of pharmacodynamic susceptibility. Methods:5 cariogenic bacteria strains were selected (Streptococcus mutans ATCC25175, Streptococcus sanguis ATCC10556, Lactobacillus rhamnosus AC413, Actinomyces naeslundii WVU627, Actinomyces viscosus ATCC19246) in present study. Various extraction compounds of Galla Chinensis were GCE (aqueous extract), GCE-B(300 ml/L alcohol extract), GCE-C(500 ml/L acetone extract),GCE-D(1 000 ml/L acetone extract), gallic acid and methyl gallate. ①Observed oral bacterial biofilm formation in MBECTM-Device at different-time-stages. ②MBECTM -HTP-Assay:The minimal inhibitory concentration (MIC) and minimal biofilm eradication concentration (MBEC) of various extraction compounds of Galla Chinensis on 5 oral bacteria strains were determined. Results:5 oral bacterial biofilm were readily formed on the lid of MBECTM-Device under selected condition (observed by SEM). 5 oral cariogenic bacteria growing as planktonic populations were sensitive to 6 extraction compounds of Galla Chinensis. When compared to 6 extraction compounds of Galla Chinensis, 5 oral cariogenic bacterial biofilm were 2-16 times less susceptible than growing planktonic bacteria. GCE and GCE-B are the most effective medicine against 5 oral cariogenic bacterial biofilm. GCE-C and GCE-D were effective in killing oral-bacterial biofilm at relatively high concentration, but gallic acid and methyl gallate were less effective.Conclusion:GCE and GCE-B are the most effective medicine against 5 oral cariogenic bacterial biofilm of 6 extraction compounds from Galla Chinensis. MBEC can provide a relatively accurate medicine concentration for clinical test.更多还原