Antimicrobial activities of various extracts of Coriolus versicoloragainst oral bacteria

Byeol-Lee Kim   Kun-Ok Lim1   So-Ra Han   Ki-Hwa Kim   Tae-Jin Oh*   

Department of BT-Convergent Pharmaceutical Engineering, Sunmoon University
1Department of Dental Hygiene, Sunmoon University

Abstract

Objectives: Coriolus versicoloris an edible mushroom with physiological activities that has been used in traditional medicine. The aim of this study was to investigate the antimicrobial activity of extracts obtained from Coriolus versicoloragainst oral pathogens. Methods: The antimicrobial activities of various extracts of Coriolus versicolorwere examined by disc diffusion assay, and minimum inhibitory concentration (MIC) of these extracts were also was determined by broth dilution method. The growth inhibition effect of extracts was measured at 600 nm for 12 hrs against Streptococcus ratti, Streptococcus criceti, Aggregatibacter actinomycetemcomitans, Actinomyces viscosus, and Actinomyces israelii. Results: Coriolus versicolorextracts showed antimicrobial activities against all nine oral pathogens through disc diffusion assay. The ethanol extract and ethyl acetate extract differed significantly compared with acetone extract against Streptococcus ratti, Streptococcus criceti, Actinomyces viscosus, Actinomyces israelii and Aggregatibacter actinomycetemcomitans (p<0.05). These extracts exhibited MIC ranges of 2.63 to >10.50 mg/ml against the tested bacteria. The ethanol extract from Coriolus versicolorshowed lower MIC values of 2.63 to 5.25 mg/ml. According to the obtained growth curve, the extracts of Coriolus versicolorwere more effective against Actinomyces viscosus. Conclusions: The acetone, ethanol, and ethyl acetate extracts from Coriolus versicolorshowed antimicrobial activities against Streptococcus mutans, Staphylococcus aureus, Streptococcus sanguinis, Streptococcus sobrinus, Streptococcus ratti, Streptococcus criceti, Aggregatibacter actinomycetemcomitans, Actinomyces viscosus, and Actinomyces israeli.i Therefore, they could be considered as natural oral antimicrobial agents against oral pathogens.

Acknowledgements

본 과제(결과물)는 2015년도 교육과학기술부의 재원으로 지원을 받아 수행된 산학협력 선도대학(LINC) 육성사업의 연구 결과입니다.

Figures & Tables

Table 1. List of strains used for antibacterial experiments