천문동 추출물의 호흡기 세균에 대한 항균활성 및 항산화
Antimicrobial Activity against Respiratory Bacteria by Asparagus Cochinchinensis Extracts and its Antioxidant Capacity
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본 연구에서는 민간에서 호흡기 질환에 효능이 있다고 알려진 천문동 뿌리를 재료로 하고 추출물을 각각 달리하여 호흡기 세균에 대한 항균작용 및 항산화를 살펴보았다. 여러가지 추출용매 중 에틸 아세테이트 추출물에서만 호흡기 세균에 대한 항균활성이 나타났으며 최소저해농도(MIC)는 S. aureus와 E. coli는 100 mg/ml, S. epidermidis는 75 mg/ ml, P. aeruginosa는 25 mg/ml로 각각 측정되어 P. aeruginosa에 대한 항균활성이 가장 높았다. 항균 활성을 나타낸 에틸아세테이트 추출물의 항산화 활성을 알아보기 위해 Lascorbic acid를 대조구로 하여 DPPH radical 소거활성을 측정한 결과는 IC50은 각각 0.17, 3.83 mg/ml로 나타났다. 또한 총 폴리페놀 및 플라보노이드 함량은 측정한 결과 각각14 ± 0.7, 0.50 ± 0.13 mg/g을 나타내었다. 본 연구는 천문동 연구의 초석으로서 향후에 생리활성 효과를 증진시킬 수 있는 연구가 더 진행된다면 건강기능식품소재로서 가능성이 있다고 생각된다.
Abstract
This study was aimed at determining the antioxidant and antimicrobial effects of solvent extracts from Asparagus cochinchinensis. The Asparagus cochinchinensis was extracted with water, methanol, ethanol, n-hexane, dichloromethane, ethyl acetate, and ether. The antimicrobial activity of these extracts was determined by modified well diffusion methods against 4 species of respiratory disease bacteria (Staphylococcus aureus, Escherichia coli, Staphylococcus epidermidis, and Pseudomonas aeruginosa). In addition, the amount of total polyphenol and flavonoid content, and antioxidant activity was evaluated. Ethyl acetate extract of A. cochinchinensis exhibited higher antimicrobial activity against tested microorganisms than water, methanol, ethanol, n-hexane, dichloromethane, and ether extracts. For antioxidant activity, the ethyl acetate extract of A. cochinchinensis exhibited a notable effect on the scavenging of superoxide against DPPH (IC50 = 3.81 mg/ml). Finally, the total polyphenol and flavonoid contents were 14 ± 0.7 mg/g, and 0.50 ± 0.13 mg/g, respectively. These results can be regarded as basic research into A. cochinchinensis for the prevention of respiratory diseases. The results indicate that A. cochinchinensis may be utilized as a nutraceutical for respiratory diseases when the physiologically active substances of A. cochinchinensis are increased by further study.
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