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다양한 부위의 연(Lotus) 열수 추출물의 항혈전 활성

Anti-thrombotic Activities of Hot-water Extracts Prepared from Various Parts of Nelumbo nucifera Gaertner

  • Ahn, Seon-Mi (Department of Food and Nutrition, Andong National University) ;
  • Sung, Hwa-Jung (Department of Food and Nutrition, Andong National University) ;
  • Kim, Jong-Sik (Department of Biological Science, Andong National University) ;
  • Park, Jong-Yi (Gyeongbuk Institute For Bio-Industry) ;
  • Sohn, Ho-Yong (Department of Food and Nutrition, Andong National University)
  • 투고 : 2018.05.23
  • 심사 : 2018.08.08
  • 발행 : 2018.10.30

초록

연(Lotus)의 항혈전 활성을 평가하기 위해, 연잎, 연자방, 연자육, 연자심, 연근 및 우절로부터 각각 열수 추출물을 제조하고, 이의 성분 분석, 항응고, 혈소판 응집저해 및 적혈구 용혈활성을 평가하였다. 연의 부위별 추출효율은 우절>연자심>연근>연잎>연자육>연자방의 순으로 나타났으며, 추출물들의 pH는 5.6~6.5, 산도는 0.06~0.20%로 다양하게 나타났다. Brix의 경우 연자육에서 70%로 가장 높게 나타난 반면, 연잎과 연자방에서는 분석한계(0.1%) 이하로 나타났다. TP 및 TF 함량은 연잎에서 179.7 및 68.5 mg/g으로 가장 높은 함량을 나타내었고, 총당은 연자육에서 873.0 mg/g, 환원당은 연잎에서 161.4 mg/g으로 가장 높게 나타났다. 한편 항응고 활성은 우절, 연잎 및 연자방 추출물에서 우수하였으며, 특히 연자방의 경우 TT, PT 및 aPTT 평가에서 무처리구에 비해 모두 15배 이상 연장된 강력한 활성을 나타내었다. 그러나, 혈소판 응집 저해 활성을 평가한 결과 연자심 추출물에서만 0.25 mg/ml 농도에서 무첨가구에 비해 25.1%의 혈소판 응집을 나타내어 강력한 응집저해 활성을 나타내었다. 인간 적혈구에 대한 용혈활성 평가결과, 연자육 추출물에서만 6.1%의 약한 용혈활성을 나타내었고, 나머지 부위 추출물에서는 용혈활성이 나타나지 않았다. 본 연구결과는 연 산업의 부산물인 우절, 연자방, 연자육 및 연자심이 혈전성 질환 예방 및 치료용 식의약품 소재로 개발 가능함을 제시하고 있다.

To investigate the anti-thrombotic activities of the lotus (Nelumbo nucifera Gaertner), various hot-water extracts were prepared from the leaf, pod of seed (PS), seed, embryo of seed (ES), root, and the node of root (NR) of the lotus. The highest extraction ratio was found in the NR (20.3%), followed by the seed, root, leaf, ES, and PS. These extracts had pH and acidity levels ranging from 5.6~6.5 and 0.06~0.20%, respectively. The seed extract showed 70% brix, whereas the leaf and PS extracts showed less than 0.1% brix. The highest contents of total polyphenol (179.7 mg/g), total flavonoids (161.4 mg/g), and reducing sugar (161.4 mg/g) were observed in the leaf extract, and the highest total sugar content (873.0 mg/g) in the seed extract. Anti-coagulation assay of the extracts of NR, leaf, and PS showed strong activities. In particular, at a concentration of 5 mg/ml, the PS extract had 15-fold extended thrombin, prothrombin, and activated partial thromboplastin times. However, only the ES extract showed activities inhibitory to platelet aggregation, with treatment with 0.25 mg/ml of ES extract decreasing platelet aggregation to 25.1%, a reduction comparable to that effected by aspirin. The extracts other than the seed extract showed no hemolysis activities against human RBC at treatments of up to 1 mg/ml. These results suggest that the NR, PS, seed, and ES, all byproducts of the lotus agriculture industry, have high potential as novel sources of anti-thrombotic agent.

키워드

참고문헌

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