Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Evaluation of the Antimicrobial Activities of 35 Seaweed Extracts against Pathogenic Bacteria and Candida sp.

35종 해조류 추출물의 병원성 세균 및 Candida sp. 진균에 대한 항균 활성 평가

  • Kim, Mi-Sun (Department of Food and Nutrition, Andong National University) ;
  • Kwon, Kyung-Jin (Department of Food and Nutrition, Andong National University) ;
  • Lee, Min-Jin (Department of Food and Nutrition, Andong National University) ;
  • Ahn, Seon-Mi (Department of Food and Nutrition, Andong National University) ;
  • Sohn, Ho-Yong (Department of Food and Nutrition, Andong National University)
  • 김미선 (안동대학교 식품영양학과) ;
  • 권경진 (안동대학교 식품영양학과) ;
  • 이민진 (안동대학교 식품영양학과) ;
  • 안선미 (안동대학교 식품영양학과) ;
  • 손호용 (안동대학교 식품영양학과)
  • Received : 2012.03.14
  • Accepted : 2012.04.17
  • Published : 2012.06.28
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Abstract

In the course of this study aimed at the development of functional food ingredients from seaweeds, the in vitro antimicrobial activities of methanol extracts prepared from 35 different seaweeds (17 phaeophyta, 11 rhodophyta and 7 chlorophyta) were determined against food-borne diseases and pathogenic microorganisms including multi-drug resistant (MDR) Pseudomonas sp. and Candida sp. Based on disc-diffusion assays at 500 g/disc concentration of the methanol extracts, Ishige okamurai, I. foliacea, Sargassum confusum, and S. yamade exhibited strong antibacterial activities in a broad-spectrum, except against Pseudomonas aeruginosa. In addition to the latter four seaweeds, Ecklonia stolonifera, E. cava and Eisenia bicyclis also demonstrated antifungal activity against C. albicans. Among these 8 selected seaweeds, I. okamurai, I. foliacea, and S. yamade exhibited strong hemolytic activity (55-93%) at 500 g/ml against human RBC. Organic solvent sequential fractions using hexane, ethylacetate and butanol, and water residues were prepared from the 8 selected seaweeds and their anti-Candida sp. activities were further determined. The ethylacetate and butanol fraction of I. okamurai, and the hexane fraction of I. foliacea demonstrated antifungal activity against MDR-pathogenic Candida sp. Although the solvent fractions had no activity against MDR-Pseudomonas sp., our results suggest that seaweeds, especially Ishige okamurai, I. foliacea, S. confusum, and S. yamade could be developed as broad-spectrum antimicrobial ingredients.

해양생물 유래의 기능성 물질 개발 연구의 일환으로, 35종 해조류로부터 메탄올 추출물을 조제하여 항생제 내성균주를 포함한 다양한 세균 및 진균에 대한 항균력을 평가하였다. 그 결과, 패, 넓패, 알쏭이 모자반 및 야마다 모자반에서 광범위한 세균에 대해 우수한 항세균 활성을 확인하였으며, 상기 4종과 함께 곰피, 대황, 감태 및 톳의 8종에서 Candida albicans 생육억제력을 확인하였다. 이중 패, 넓패, 야마다모자반 추출물은 500 ${\mu}g/mL$ 농도에서 55-93%의 인간적혈구 용혈활성을 나타내었다. 상기 8종 해조류의 메탄올 추출물을 n-hexane, ethylacetate, butanol을 이용하여 순차적 용매 분획물과 물 잔류물을 조제하여 다양한 Candida sp.에 대한 항균력을 평가한 결과, 패 및 넓패로부터 C. albicans 및 항생제 내성 Candida sp.에 대한 신규의 항균제 개발 가능성을 확인하였다. 본 연구 결과는 해조류 특히 패, 넓패, 알송이모자반, 야마다모자반이 다양한 세균 및 항생제 내성진균의 제어를 위한 생물자원으로 개발 가능함을 제시하고 있다.

Keywords

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