Physiological Activity and Antioxidative Effects of Aged Black Garlic (Allium sativum L.) Extract

숙성에 의해 제조된 흑 마늘 추출물의 생리학적 활성 및 항산화 효과

  • Jang, Eun-Kyung (Departments of Agricultural Chemistry, Kyungpook National University) ;
  • Seo, Ji-Hyun (The Center for Traditional Microorganism Resources (TMR), Keimyung University) ;
  • Lee, Sam-Pin (Department of Food Science and Technology, Keimyung University)
  • Published : 2008.08.01

Abstract

In this study, black garlic was produced by aging under high temperature $(70^{\circ}C)$ and high humidity (90% RH) conditions. Then, the physiological activity and antioxidative effects of its extract were compared to those of normal garlic extract. The black garlic extract had a 2.5-fold higher total polyphenol content than that of the normal garlic extract, showing levels of 10.0 mg/g and 3.7 mg/g, respectively. At the $1,000{\mu}g/mL$ concentration, the black garlic and normal garlic extracts had electron donating abilities of 101.9% and 12.9%, respectively. For their nitritescavenging effects, the normal garlic extract showed slightly higher scavenging activity than the black garlic extract at the 5 mg/mL concentration; whereas the black garlic extract had a slightly higher effect at concentrations above 20 mg/mL. In terms of their superoxide dismutase activities, the black garlic extract showed a 10-fold higher activity as compared to the normal garlic extract at the 20 mg/mL concentration. Furthermore, at 50 mg/mL, the angiotensin converting enzyme inhibitory effects of the normal garlic and black garlic extracts were approximately 52.7% and 88.8%, respectively. These results indicate that the antioxidant activity and ACE inhibitory effects of the black garlic extract were greater than those of the normal garlic extract.

고온에서 숙성시켜 제조된 흑 마늘의 총폴리페놀 함량은 10.0 mg/g으로 생마늘 3.7 mg/g보다 2.5배 이상 높은 값을 보였다. 생마늘과 흑 마늘 추출물의 전자공여능 실험 결과, 흑 마늘 추출물의 농도 증가에 따라 전자공여능이 급격하게 증가하는 것으로 나타났으며, 추출물의 농도가 $1,000{\mu}g/mL$일 때 생마늘은 12.9%, 흑 마늘은 101.9%로 흑 마늘이 생마늘에 비하여 항산화력이 매우 높은 것으로 나타났다. 아질산염 소거능은 추출물의 농도가 5mg/mL일 때 생마늘 추출물이 흑 마늘 추출물보다 1.7배 높게 나타났으나, 그 이상의 농도에서는 비슷하거나 흑 마늘 추출물이 유의적으로 높게 나타났다 생마늘과 흑 마늘 추출물에서 SOD 활성은 추출물의 농도가 20mg/mL일 때 각각 3.3%와 30.9%를 나타내었으며, 흑 마늘이 생마늘에 비하여 SOD 활성이 유의적으로 높게 나타났다. ACE 저해활성은 추출물의 농도가 50mg/mL 일 때 생마늘과 흑 마늘에서 각각 52.7%, 88.8%로 흑 마늘의 항고혈압활성이 높은 것으로 나타났다.

Keywords

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