The Journal of Korean Obstetrics and Gynecology (대한한방부인과학회지)

The Society of Korean Medicine Obstetrics and Gynecology (대한한방부인과학회)
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Antibacterial Effects of Chungdae-tang Aqueous Extracts, and Their Combination Effects with Clindamycin against Gardnerella vaginalis In Vitro

청대탕(淸帶湯)의 Gardnerella vaginalis에 대한 시험관내 항균력 및 Clindamycin과의 병용 효과

  • Kwon, Ji-Myung (Dept. of Oriental Obstetrics & Gynecology, College of Oriental Medicine, Daegu Haany University) ;
  • Kim, Dong-Chul (Dept. of Oriental Obstetrics & Gynecology, College of Oriental Medicine, Daegu Haany University)
  • 권지명 (대구한의대학교 한의과대학 부인과 교실) ;
  • 김동철 (대구한의대학교 한의과대학 부인과 교실)
  • Received : 2011.04.30
  • Accepted : 2011.05.11
  • Published : 2011.05.28
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Abstract

Objectives: The object of this study was to observe the in vitro antibacterial effects of Chungdae-tang aqueous extracts, traditionally used for treating various gynecological diseases including vaginitis in Korea against Gardnerella vaginalis, and combination effects of Chungdae-tang extracts with Clindamycin were also monitored in this study. Methods: Antibacterial activities against Gardnerella vaginalis of Chungdae-tang aqueous extracts were detected using standard agar microdilution methods. In addition, the effects on the bacterial growth curve were also monitored at MIC and MIC${\times}$2 levels. The combination effects of Chungdae-tang aqueous extracts with Clindamycin were observed by Checkerboard microtiter assay, and the effects of bacterial growth curve treated with or Chungdae-tang aqueous extracts MIC+Clindamycin MIC, 1/2MIC and 1/4MIC, respectively. In the present study, Gardnerella vaginalis were incubated under $37^{\circ}C$, 10% $CO_2$; and bacterial growth curves were calculated at 24, 48, 72, 96 and 120hrs after incubations. Results: MIC of Chungdae-tang aqueous extracts against Gardnerella vaginalis were detected as $3.906{\pm}2.344$(0.782~6.250) mg/$m\ell$, respectively. MIC of Clindamycin was detected as $0.010{\pm}0.006$(0.004~0.016) ${\mu}g/m\ell$ at same conditions. In addition, Clindamycin and Chungdae-tang aqueous extracts also showed marked dosage-dependent inhibition of bacterial growth, and more dramatical inhibitions were detected in Clindamycin+Chungdae-tang aqueous extracts MIC treatment as compared with each of single Clindamycin MIC and Chungdae-tang aqueous extracts MIC treatments, respectively. In addition, quite similar inhibitory effects on bacterial growth were detected in Clindamycin 1/4 MIC+Chungdae-tang aqueous extracts MIC treatment as compared with single Clindamycin MIC treatment in the present study. FIC index in combination of Chungdae-tang and Clindamycin were detected as $0.775{\pm}0.285$ (0.500~1.250) at Checkerboard microtiter assay. Conclusions: The results obtained in this study suggest that Chungdae-tang aqueous extracts showed antibacterial effects against Gardnerella vaginalis, and it also showed dosage-dependent inhibitory effects on the bacterial growth. In addition, combination treatment of Chungdae-tang aqueous extract with Clindamycin showed more potent inhibitory effects on the growth of Gardnerella vaginalis with FIC index $0.775{\pm}0.285$(0.500~1.250), respectively. It means, the combination of Chungdae-tang aqueous extract with Clindamycin is partially synergistic effects. It, therefore, is expected that effective dosages of Clindamycin will be reduced to 1/4 or over 1/4 levels as combination with Chungdae-tang extracts, respectively.

Keywords

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