Journal of the Society of Cosmetic Scientists of Korea (대한화장품학회지)

Society of Cosmetic Scientists of Korea (대한화장품학회)
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Antimicrobial Synergistic Effects of Gallnut Extract and Natural Product Mixture against Human Skin Pathogens

피부 병원성균에 대한 오배자 천연 복합물의 시너지 항균 효과

  • Kim, Ju Hee (Department of Natural Product Laboratory, Daebong LS Co., Ltd.) ;
  • Choi, Yun Sun (Department of Natural Product Laboratory, Daebong LS Co., Ltd.) ;
  • Kim, Wang Bae (Department of Natural Product Laboratory, Daebong LS Co., Ltd.) ;
  • Park, Jin Oh (Department of Natural Product Laboratory, Daebong LS Co., Ltd.) ;
  • Im, Dong Joong (Department of Natural Product Laboratory, Daebong LS Co., Ltd.)
  • 김주희 (대봉엘에스(주) 천연물소재응용연구소) ;
  • 최연선 (대봉엘에스(주) 천연물소재응용연구소) ;
  • 김왕배 (대봉엘에스(주) 천연물소재응용연구소) ;
  • 박진오 (대봉엘에스(주) 천연물소재응용연구소) ;
  • 임동중 (대봉엘에스(주) 천연물소재응용연구소)
  • Received : 2021.05.13
  • Accepted : 2021.06.24
  • Published : 2021.06.30
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Abstract

This study was attempted to investigate natural materials with antimicrobial activity and to apply as natural preservatives in cosmetics. The disc diffusion method was used to search for nine species of natural antibacterial material for three species of skin pathogenic bacteria (Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa) and Candida albicans. As a result of measuring the size of inhibition zone, Rhus Semialata gall (Gallnut) extract, Oak vinegar, and ε-polylysine were showed strongest antibacterial activities (> 10 mm). The Minimum Bactericidal Concentration (MBC) of gallnut and oak vinegar ranged from 10 to 20 mg/mL and from 20 to 40 mg/mL against five human skin pathogens. The MBC of ε-polylysine ranged from 0.5 to 2 mg/mL in fungus. The synergic effect of gallnut extract/oak vinegar mixture and gallnut extract/ε-polylysine mixture were evaluated by checkerboard test. Compared to when used alone, the MBC of gallnut extract/oak vinegar mixture were at 4 times lower concentration against E. coli, C. albicans, and A. brasiliensis. Also Furthermore, the MBC of gallnut extract/ε-polylysine mixture were at 4 times lower concentration against C. albicans and A. brasiliensis. It was confirmed that the combination of gallnut extract with oak vinegar or ε-polylysine resulted in synergistic antibacterial effect against three human skin pathogens. Thus, it is expected that gallnut extract and natural product mixture can not only demonstrate antibacterial synergies, but also be applied in cosmetics as a natural preservative system with a wide antibacterial spectrum.

본 연구는 항균 활성을 갖는 천연 소재를 검색하고 화장품의 보존제로써 적용을 위해 진행되었다. 디스크 확산법(disc diffusion method)을 통해 피부 병원성균 3 종(Staphylococcus aureus, Escherichia coli (E. coli), Pseudomonas aeruginosa)과 효모균(Candida albicans (C. albicans))에서의 천연 항균 소재 9 종을 검색하였다. Inhibition zone 크기를 측정한 결과, 오배자 추출물(Rhus Semialata gall (Gallnut) extract), 참나무 목초액 (Oak vinegar) 그리고 폴리리신(ε-polylysine)은 10 mm 이상으로 다른 추출물에 비해 우수한 항균활성을 나타내었다. 병원성균 3종과 효모균, 곰팡이균(Aspergillus brasiliensis (A. brasiliensis))에서 최소살균농도(minimum bactericidal concentration, MBC)를 측정한 결과, 오배자 추출물과 참나무 목초액은 5 종의 병원성균에서 10 ~ 20 mg/mL와 20 ~ 40 mg/mL, 폴리리신의 경우 진균류에서 0.5 ~ 2 mg/mL으로 살균 작용에 의한 항균효과를 각각 확인하였다. Checkerboard 방법에 따라 오배자 추출물과 참나무 목초액, 오배자 추출물과 폴리리신의 혼합 비율에 따른 시너지 효과(synergistic effect), 부가 효과(additive effect), 무관함(indifferent) 그리고 상쇄효과(antagonistic effect)를 평가하였다. 그 결과, 단독으로 사용할 때보다 오배자 추출물과 참나무 목초액 복합물은 E. coli, C. albicans, A. brasiliensis를, 오배자 추출물과 폴리리신 복합물은 C. albicans, A. brasiliensis를 4 배 낮은 농도에서 99.9% 억제하며 항균 시너지 효과를 확인하였다. 오배자 추출물과 참나무 목초액 복합물은 S. aureus와 P. aeruginosa를 2 배 낮은 농도에서 억제하며 부가 효과가 확인되었다. 이로써, 오배자 천연 복합물은 항균 시너지 효과를 발휘할 수 있음을 입증했을 뿐만 아니라 넓은 항균 스펙트럼을 갖춘 천연 방부 시스템으로써 화장품에서 응용할 수 있을 것으로 기대된다.

Keywords

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