Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Physicochemical Properties and Biological Activities of Protaetia brevitarsis seulensis Larvae Fermented by Several Kinds of Micro-organisms

유용 미생물을 이용한 발효굼벵이 추출물의 이화학적 특성 및 생리활성효과

  • Received : 2018.02.23
  • Accepted : 2018.03.21
  • Published : 2018.07.30
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Abstract

In this study, the biological activities of aqueous, ethanol, and methanol extracts of larvae of the edible insect Protaetia brevitarsis seulensis, fermented using several kinds of microorganisms, were tested in in vitro experimental models. Six effective microorganisms were used for fermentation, namely Lactobacillus plantarum JBMI F3, Lactobacillus plantarum JBMI F5, Lactobacillus gasseri Ba9, Aspergillus kawachii KCCM 32819, Saccharomyces cerevisiae KACC 93023, and Bacillus subtilis KACC 91157. Biological activities (${\alpha},{\alpha}^{\prime}-diphenyl-{\beta}-picrylhydrazyl$ [DPPH] free radical scavenging activity, reducing power, and fibrinolytic activity), and biochemical properties (phenolic compounds and flavonoids) were examined in aqueous, ethanol, and methanol extracts from P. brevitarsis seulensis powder and fermented P. brevitarsis seulensis powder. The total phenolic compounds and flavonoid contents were highest in the aqueous extract of B. subtilis-fermented P. brevitarsis seulensis powder. DPPH radical scavenging activity and reducing power were stronger in the fermented group than the nonfermented group. Fibrinolytic activity were highest in the extract from B. subtilis-fermented P. brevitarsis seulensis powder. The ${\alpha}-amylase$ activity in starch was higher in the fermented group than the nonfermented group, but there was no significant difference. These results provide basic data to understand the biological activities of bioactive materials derived from fermented P. brevitarsis seulensis larvae for the development of functional foods.

본 연구는 유용 미생물을 이용하여 흰점박이 꽃무지 유충을 발효시킨 분말을 수용성, 에탄올, 메탄올 용매별 추출하여 항산화 등의 실험에 임하였다. 발효 균주로는 3종의 유산균 Lactobacillus plantarum JBMI F3, Lactobacillus plantarum JBMI F5, Lactobacullus gasseri Ba9, 1종의 곰팡이 Aspergillus kawachii KCCM 32819, 1종의 효모 Saccharomyces cerevisiae KACC 93023, 1 종의 바실러스 Bacillus subtilis KACC 91157 총 6종의 유용 미생물 균주를 사용하였다. 발효 굼벵이 분말 추출물의 유효성분(총 페놀 함량 및 플라보노이드 함량)과 생리 활성 효능(DPPH 자유 라디칼 소거 활성, 환원력 실험, 혈전용해능, ${\alpha}-amylase$ 활성)을 비교 검토하였다. 총 페놀 함량 및 플라보노이드 함량은 바실러스 균주 발효 굼벵이 분말의 수용성 추출물에서 높은 수치를 나타내었다. 항산화 활성을 확인하기 위해 DPPH 자유 라디칼 소거능 및 환원력 실험을 수행한 결과, 비발효군 보다 발효군에서 우수한 항산화능을 보였고, 그 중 바실러스 균주를 이용한 발효 추출물이 긍정적인 효과를 나타내었다. 혈전 용해능에서 또한, 바실러스 균주 발효 굼벵이 추출물에서 우수한 혈전 용해능을 확인였고, 효소-기질 분해능 실험의 ${\alpha}-amylase$ 활성은 비발효군보다 발효군에서 높은 효과를 확인하였으나 발효균주간 유의적인 차이는 없었다. 따라서, 유용 미생물을 이용한 발효 굼벵이 추출물의 유용성분 및 생리활성이 강화됨을 확인하였고, 이는 건강 식품 소재로의 이용 가능성이 높다고 판단된다.

Keywords

References

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