독일가문비(Picea abies Karsten) 잎 추출성분의 항산화 활성

Antioxidant Activity of the Extractives from the Needles of Picea abies Karsten

  • 이상극 (국립산림과학원 화학미생물과) ;
  • 배영수 (강원대학교 산림과학대학 임산공학과)
  • Lee, Sang-Keug (Department of Wood Chemistry & Microbiology, Korea Forest Research Institute) ;
  • Bae, Young-Soo (Department of Wood Science & Engineering, College of Forest Sciences, Kangwon National University)
  • 투고 : 2006.05.04
  • 심사 : 2006.06.16
  • 발행 : 2006.12.31

초록

독일가문비(Picea ahies Karsten) 잎을 채취하여 건조시킨 후 분쇄하여 1.5 kg을 acetone-$H_2O$(7:3, v/v)로 추출하고 핵산, 메틸렌클로라이드, 에틸아세테이트 및 물 가용부로 분획하여 동결건조 시켰다. 에틸아세테이트 및 물 가용부를 Sephadex LH-20으로 충진한 칼럼에서 MeOH와 EtOH-n-hexane 혼합액을 용출용매로 사용하여 칼럼크로마토그래피를 실시하였다. 단리된 화합물들은 셀룰로오스 박층크로마토그래피(TLC)로 확인한 후 $^1H$-, $^{13}C$-NMR 등의 스펙트럼을 사용하여 정확한 구조를 규명하였고 FAB 및 El-MS로써 분자량을 측정하였다. 독일가문비 잎의 에틸아세테이트 가용부에는 (+)-catechin(화합물 I), (-)-epicatechin(화합물 II), kaempferol-3-O-${\beta}$-D-glucopyranoside(화합물 III), 4-hydroxyacetophenone(화합물 IV)가 분리되었으며 물 가용부에서는 (+)-catechin(화합물 I)과 protocatechuic acid(화합물 V)가 분리되었다. 각 분획물 및 단리된 화합물들은 DPPH 라디칼 소거법을 이용하여 항산화 시험을 실시하였으며, 분획물중에는 에틸아세테이트 가용부, 그리고 화합물중에는 (T)-catechin과 (-)-epicatechin에서 기준물질과 유사한 우수한 항산화 효능이 있는 것으로 나타났다.

The dried needles (1.5 kg) of Picea abies Karsten were ground, extracted with acetone-$H_2O$ (7:3, v/v), concentrated, and fractionated with a series of n-hexane, methylene chloride, ethyl acetate and water on a separatory funnel. Each fraction was freeze dried, then a portion of ethyl acetate soluble powder was chromatographed on a Sephadex LH-20 column using a series of aqueous methanol and ethanol-n-hexane mixture as eluents. The isolated compounds were identified by cellulose TLC, $^1H$-, $^{13}C$-NMR, FAB and EI-MS. (+)-catechin (compound I), (-)-epicatechin (compound II), kaempferol-3-O-${\beta}$-D-glucopyranoside (compound III), 4-hydroxyacetophenone (compound IV) were isolated from the ethyl acetate soluble fraction and (+)-catechin (compound I), protocatechuic acid (compound V) were isolated from the $H_2O$ soluble fraction of P. abies needle. The antioxidative activities of each fraction and the isolated compounds were tested by DPPH radical scavenging method, and EtOAc soluble fraction, (+)-catechin and (-)-epicatechin showed similar values to ${\alpha}$-tocopherol and BHT as controls.

키워드

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