Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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ACE Inhibitory Lignan Glycosides Isolated from Eucommia ulmoides Oliver

두충으로부터 분리한 Iignan glycoside 의 ACE 활성 억제

  • Joo, Ok-Soo (Department of Food science, Jinju National University) ;
  • Nam, Sang-Hae (Department of Food science, Jinju National University)
  • 주옥수 (진주산업대학교 식품과학과) ;
  • 남상해 (진주산업대학교 식품과학과)
  • Published : 2009.06.30
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Abstract

To evaluate a potential possibility of Eucommia ulmoides Oliver as a functional food, ACE (angiotensin converting enzyme) inhibitory activities of leaf, bark, stem and 4 compounds isolated from E. ulmoides were tested. The 4 compounds were isolated and purified by silica gel column chromatography, thin layer chromatography and reverse phase column chromatography. Compound I was pinoresinol-4,4'di-O-${\beta}$-D-glucoside (PG) and compound II was dehydrodiconiferyl alcohol 4,${\gamma}$'-di-O-${\beta}$-D-glucopyranoside (DAG) originating from Eucommial Cortex. The highest amount of PC was present at raw and roasted bark as 135.13 mg% and 163.67 mg%, and the highest amount of DAG was present at raw and roasted leaf as 117.93 mg% and 133.93 mg% respectively. In an ACE inhibition test, 10 mg/ml of roasted leaf, raw and roasted bark extracts of E. ulmoides Oliver were 77.49%, 75.72% and 75.36% respectively, and 10mg/ml of PC and DAG were shown to be 78.51 and 81.20% respectively. $IC_{50}$ values of PG and DAG were 0.6${\pm}$0.2 and 0.5${\pm}$0.2 mg/ml respectively.

두충 (Eucommia ulmoides Oliver)으로부터 항고혈압 활성을 가진 유효물질을 분리하였으며, 두충의 잎, 껍질 및 줄기를 건조한 것과, 건조한 후 붉은 것에 대하여 ACE (angiotensin converting enzyme) 저해활성을 실험하였다. 두충으로부터 분리 한 유효물질은 pinoresinol-4,4'-di-O-${\beta}$-D-glucoside (PG)와 dehydrodiconiferyl alcohol 4,${\gamma}$'-di-O-${\beta}$-D-glucoside (DAG)였으며, 이들은 각각 껍질과 잎에 많이 함유되 어 있었다. 즉 pinoresinol-4,4'-di-O-${\beta}$-D-glucoside (PG)는 자연 건조한 껍질에 135.12 mg%, 붉은 껍질에 163.94 mg%로 가장 많이 함유되어 있었으며, dehydrodiconiferyl alcohol 4,${\gamma}$'-di-O-${\beta}$-D-glucoside (DAG)는 자연 건조한 잎에 117.43 mg%, 붉은 잎에 133.93 mg%로 비교적 많이 함유되어 있었다. ACE 억제활성은 볶은 잎, 말린 껍질 및 볶은 껍질을 10 mg/ml씩 처리하였을 때, 각각 77.49, 75.52 및 75.36%의 억제효과를 나타내었으며, 두충으로부터 분리한 화합물인 pinoresinol-4,4'-di-O-${\beta}$ -D-glucoside (PG)와 dehydrodiconiferyl alcohol 4,${\gamma}$'-di-O-${\beta}$-D-glucoside (DAC)를 1${\sim}$10 mg/ml 처리하였을 때에 는 67.1${\sim}$85.25% 의 억제활성을 나타내었으며, $IC_{50}$값은 각각 0.6${\pm}$0.2, 0.5${\pm}$0.2 mg/ml 였다. 이것은 PG와 DAG가 두충에서 분리한 천연물임을 감안하면 매우 높은 활성을 가지고 있다고 할 수 있다.

Keywords

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