추출용매에 따른 모링가(Moringa oleifera Lam.) 잎의 항산화 및 생리활성 효과
Antioxidant activity and physiological properties of Moringa (Moringa oleifera Lam.) leaves extracts with different solvents
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초록
모링가 잎의 이용성 증대를 할 수 있는 적정 추출조건을 알아보고자 추출용매를 달리하여 추출한 후 항산화 및 생리활성 특성을 비교하였다. 추출수율은 물(13.17%), 메탄올(9.54%), 에탄올(7.48%)의 순으로 나타났으며, 총 폴리페놀 및 플라보노이드 함량은 물 추출물에서 각각 58.04 mg/g, 12.36 mg/g으로 다른 용매에 비해 높은 값을 보였다. 항산화 활성은 물 추출물이 에탄올, 메탄올 추출물에 비해 유의적으로 높은 활성을 나타내었으며 특히 DPPH 및 ABTS 라디칼 소거활성은 양성대조구인 BHT와 비교하였을 때 비슷한 경향을 보여 높은 항산화 활성을 확인하였다. α-glucosidase 저해활성은 다른 추출물에 비해 에탄올 추출물에서 가장 높은 활성을 나타내었다. 한편 ACE 및 HMG-CoA reductase 저해활성은 물 추출물에서 높은 활성을 보였으며 특히 HMG-CoA reductase 저해활성의 경우, 전체적으로 높은 저해활성을 나타내어 콜레스테롤 개선 효과에 대한 가능성을 확인하였다. 이러한 결과를 종합해 볼 때 물 추출물이 에탄올이나 메탄올 추출물보다는 우수한 항산화 및 생리활성 효과를 나타내어 소재 활용가치가 높고 향후 천연 항산화제 및 기능성 소재로서의 개발이 가능할 것으로 판단된다.
Abstract
This study was conducted to investigate the antioxidant activity and physiological properties of Moringa (Moringa oleifera Lam.) leaves extracted with three different solvents (water, ethanol, and methanol). The extraction yield from water, methanol, and ethanol were 13.17, 9.54, and 7.48%, respectively. The highest total polyphenol content (58.04 mg/100 g) and total flavonoid contents (12.36 mg/100 g) were observed in water extract. The DPPH radical scavenging activity was the highest in the water extract (79.18%) at the 500 mg% level, similar to BHT (77.18%). Additionally the same tendency was observed with DPPH, ABTS radical scavenging ability, and ferreous ion chelating ability. The water extract showed relatively high antioxidant activities. The angiotensin Ⅰ-converting enzyme (ACE) and the HMG-CoA reductase inhibitory activity of water extract at a concentration of 500 mg% were somewhat higher than those of the other extracts. Additionally, the HMG-CoA reductase inhibitory activity of the water extract was significantly slightly lower than that of the positive control (cholorogenic acid). These results suggest that Moringa leaves extracted with water will be useful as antioxidant-rich and functional natural foods.
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