加減攝營煎의 Gardnerella vaginalis에 대한 시험관내 항균력 및 Clindamycin과의 병용효과
In Vitro Antibacterial Effects of Gagam-seopyoungjeon Aqueous Extracts and Their Combination Effects with Clindamycin against Gardnerella Vaginalis
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Objectives: The object of this study was to observe the in vitro antibacterialeffects of Gagam-seopyoungjeon aqueous extracts (GGSYJ) against Gardnerellavaginalis and the possible synergic combination effects with clindamycin. Methods: Antibacterial activities against Gardnerella vaginalis of GGSYJ weredetected using minimal inhibition concentration (MIC), and the effects on the bacterialgrowth curve were also monitored at MIC and MIC×2 levels. The combinationeffects of GGSYJ with clindamycin were observed by checkboard microtiter assay,and the effects of bacterial growth curve treated with GGSYJ MIC+clindamycinMIC, 1/2 MIC and 1/4 MIC, respectively. The effects on the bacterial invasion andintracellular killing of GGSYJ were also observed using human vaginal epithelial(VK2) and murine macrophage (Raw264.7) cells with combination effects withclindamycin after treatment of GGSYJ MIC+clindamycin 1/2 MIC, 1/4 MIC and1/6 MIC, respectively. Results: The MIC of clindamycin and GGSYJ against Gardnerella vaginaliswere detected as 0.012±0.006 (0.004~0.016) μg/ml and 1.016±0.524 (0.391~1.563)mg/ml, respectively. Clindamycin and GGSYJ were also showed marked dosagedependentinhibition of bacterial growth, and significant decreases of viable cells weredetected in clindamycin MIC+GGSYJ MIC and clindamycin 1/2 MIC+GGSYJMIC treatment as compared with each of single clindamycin MIC and GGSYJMIC treatments. And significant decreases of intraepithelial and intra-macrophageviable bacteria numbers were detected in clindamycin 1/2 MIC+GGSYJ 1/2 MICand clindamycin 1/4 MIC+GGSYJ 1/2 MIC treatment as compared with eachof single clindamycin GGSYJ 1/2 MIC treatments, respectively. Conclusions: GGSYJ showed slight antibacterial effects against Gardnerellavaginalis, but they showed dosage-dependent inhibitory effects on the bacterial growthand VK2 epithelial invasions of bacteria with favorable accelerating effects of intracellularkilling activities of macrophages. In addition, combination of GGSYJ also increasedthe inhibitory effects of clindamycin on the epithelial invasions of Gardnerella vaginalisand intracellular killing activities of macrophages against Gardnerella vaginalis as2-fold higher as compared with clindamycin single treatment, respectively. Therefore,we expected that the clinical dosages of clindamycin can be reduced as 1/2 levelsas combination with GGSYJ.
Abstract
Objectives: The object of this study was to observe the in vitro antibacterialeffects of Gagam-seopyoungjeon aqueous extracts (GGSYJ) against Gardnerellavaginalis and the possible synergic combination effects with clindamycin. Methods: Antibacterial activities against Gardnerella vaginalis of GGSYJ weredetected using minimal inhibition concentration (MIC), and the effects on the bacterialgrowth curve were also monitored at MIC and MIC×2 levels. The combinationeffects of GGSYJ with clindamycin were observed by checkboard microtiter assay,and the effects of bacterial growth curve treated with GGSYJ MIC+clindamycinMIC, 1/2 MIC and 1/4 MIC, respectively. The effects on the bacterial invasion andintracellular killing of GGSYJ were also observed using human vaginal epithelial(VK2) and murine macrophage (Raw264.7) cells with combination effects withclindamycin after treatment of GGSYJ MIC+clindamycin 1/2 MIC, 1/4 MIC and1/6 MIC, respectively. Results: The MIC of clindamycin and GGSYJ against Gardnerella vaginaliswere detected as 0.012±0.006 (0.004~0.016) μg/ml and 1.016±0.524 (0.391~1.563)mg/ml, respectively. Clindamycin and GGSYJ were also showed marked dosagedependentinhibition of bacterial growth, and significant decreases of viable cells weredetected in clindamycin MIC+GGSYJ MIC and clindamycin 1/2 MIC+GGSYJMIC treatment as compared with each of single clindamycin MIC and GGSYJMIC treatments. And significant decreases of intraepithelial and intra-macrophageviable bacteria numbers were detected in clindamycin 1/2 MIC+GGSYJ 1/2 MICand clindamycin 1/4 MIC+GGSYJ 1/2 MIC treatment as compared with eachof single clindamycin GGSYJ 1/2 MIC treatments, respectively. Conclusions: GGSYJ showed slight antibacterial effects against Gardnerellavaginalis, but they showed dosage-dependent inhibitory effects on the bacterial growthand VK2 epithelial invasions of bacteria with favorable accelerating effects of intracellularkilling activities of macrophages. In addition, combination of GGSYJ also increasedthe inhibitory effects of clindamycin on the epithelial invasions of Gardnerella vaginalisand intracellular killing activities of macrophages against Gardnerella vaginalis as2-fold higher as compared with clindamycin single treatment, respectively. Therefore,we expected that the clinical dosages of clindamycin can be reduced as 1/2 levelsas combination with GGSYJ.
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