한국미생물·생명공학회지 (Microbiology and Biotechnology Letters)

  • 제40권4호
  • /
  • Pages.333-338
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  • 2012
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  • 1598-642X(pISSN)
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  • 2234-7305(eISSN)
한국미생물·생명공학회 (The Korean Society for Microbiology and Biotechnology)
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북극 지의류로부터 분리한 미생물 배양 추출액의 항산화 활성

Antioxidant Activities of Bacterial Culture Extracts Isolated from Arctic Lichens

  • Kim, Mi-Kyeong (Institute of Biomolecule Reconstruction, Department of Pharmaceutical Engineering, SunMoon University) ;
  • Park, Hyun (Korea Polar Research Institute (KOPRI)) ;
  • Oh, Tae-Jin (Institute of Biomolecule Reconstruction, Department of Pharmaceutical Engineering, SunMoon University)
  • 투고 : 2012.07.31
  • 심사 : 2012.10.15
  • 발행 : 2012.12.28
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초록

지의류는 곰팡이, 조류 및 남조균류의 공생체이다. 본 연구팀은 최근 북극 지의류로부터 분리한 몇몇 미생물 종의 항산화 활성에 대하여 연구하였고, 그들의 높은 항산화 활성을 확인하였다. 본 연구에서는 Cladonia sp., Sterocaulon sp., Umbilicaria sp. 및 Cetraria sp. 총 4종류의 지의류로부터 5종의 미생물을 새롭게 분리하였고 배양 후, 다양한 용매 추출법으로 그들의 항산화능을 조사하였다. DPPH와 ABTS 자유 라디컬 소거능 측정법 및 FRAP 분석 등을 수행하였다. 또한 총 폴리페놀함량과 총플라보노이드 함량 분석 역시 수행하였다. 지의류 유래 미생물 배양 추출액 중, Burkholderia sordidicola S5-B(T) 유사 미생물 종의 에틸아세테이트 추출액은 DPPH 분석에서 대조군인 아스코르빈산 (51.3%)에 비해 72.9%로 높은 항산화 활성을 보였을 뿐만 아니라, 높은 플라보노이드와 폴리페놀 함량을 나타내었다. 결과적으로, 이러한 지의류 유래 미생물 종들은 잠재적으로 천연 항산화제의 원천소재로서 이용가능할 것이다.

Lichens are a symbiosis between fungi, algae and cyanobacteria. Our group recently studied the antioxidant properties of some bacterial species isolated from Arctic lichens and we confirmed that they possess high antioxidant activities. In this paper, we investigated the antioxidant capacity of 5 microorganisms newly isolated from 4 Arctic lichen species, Cladonia sp., Sterocaulon sp., Umbilicaria sp. and Cetraria sp., using various solvent extractions. We carried out 1,1-diphenyl-2-picryl-hydrazyl (DPPH) and 2,2'-azino-bis(3-ethyl benzothiazoline-6-sulphonic acid) (ABTS) free radical scavenging activity test and ferric reducing antioxidant power (FRAP) assay. Also total phenolic and flavonoid content assays were performed. Among the bacterial culture extracts of the tested lichen-microorganisms, ethyl acetate extracts of Burkholderia sordidicola S5-B(T) had not only a high antioxidant activity (72.9%) when compared with the ascorbic acid used as the control (51.3%) in the DPPH assay, but also a high amount of phenolic content as well as flavonoid content. As a result, these lichen-microorganisms may be potentially useful sources of natural antioxidants.

키워드

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피인용 문헌

  1. Recent literature on lichens-230 vol.116, pp.3, 2012, https://doi.org/10.1639/0007-2745-116.3.316
  2. Antibacterial and antioxidant potential of polar microorganisms isolated from Antarctic lichen Psoroma sp. vol.8, pp.39, 2012, https://doi.org/10.5897/ajmr2014.6970