桔梗、甘草及其组成的复方对口腔病原菌生长影响的体外实验

Effects of Platycodon grandiflorum,Glycyrrhiza uralensis Fisch or the compound of both on the growth of oral pathogens in vitro

目的 :探讨桔梗、甘草及其组成的复方中药对常见致龋菌和牙周病原菌生长的影响。方法 :用 φ =65 %的乙醇溶液分别对桔梗、甘草及其组成的复方中药进行初步提取 ,观察 3种粗提物对常见口腔致病菌生长的抑制影响 ,并检测其最小抑菌浓度 (minimalinhibitoryconcentration ,MIC)和最小杀菌浓度 (minimalbactericidalconcentration ,MBC)。结果 :桔梗不影响口腔致病菌的生长 ,甘草仅对致龋菌有抑制作用 ,对S .mutansMT814 8和S .sobrinus 6715的MIC均为 3.91mg/ml;而桔梗和甘草组成的复方明显抑制 4种实验菌株的生长 ,对S .mutansMT814 8和S .sobrinus 6715的MIC为 1.96mg/ml ,对P .gingivalis 381的MIC为 3.91mg/ml,B .forsythus 430 37的MIC为 7.81mg/ml。 结论

Objective: To examine effects of Platycodon grandiflorum (JG), Glycyrrhiza uralensis Fisch (GC) or the compound of JG with GC on the growth of cariogenic and periodontopathic bacteria in vitro . Methods: JG,GC and the compound were extracted with φ=65% ethanol respectively. The minimal inhibitory concentration(MIC)and minimal bactericidal concentration (MBC) of JG, GC or compound against S.mutans MT818, S. sobrinus 6715, P.gingivalis 381 and B.forsythus 43037 were measured by drug sensetivity test.Results: JG showed no effect on the growth of oral pathogens tested;GC inhibited S.mutans MT 8418 and S.sobrinus 6715 with MIC of 3.91 mg/ml.The compound inhibited the microorganisms with the MIC of 1.96 mg/ml against S.mutans MT8148 or S.sobrinus 6715, 3.91 mg/ml against P.gingivalis 381, 7.81 mg/ml against B.forsythus 43037 respectively.Conclusion: The compound of JG and GC has stronger inhibition and bactericidal effects on oral pathogens than the single medicine.