궁궁이(Angelica polymorpha MAXIM)로부터 분리한 Coumarin 계열 화합물의 Melanin 생합성 억제 활성

Melanin Biosynthesis Inhibitory Activities of Coumarins Isolated from Angelica polymorpha MAXIM

  • 발행 : 2003.06.01

초록

Melanin 생합성에 key enzyme인 tyrosinase 억제가 melanin색소 억제에 주된 요인으로 알려져 있지만, 생합성기작에는 여러 다른 요인들이 작용하기 때문에 일차적인 탐색 단계에서 tyrosinase 저해 활성뿐만 아니라 S. bikiniensis의 melanin생합성 억제 연구를 병행하여 천연물을 탐색하였다. 그 중 선택된 궁궁이 (Angelica poiymorpha MAXIM)에서 3가지 물질을 분리하였으며, 3가지 물질 모두가 100$\mu\textrm{g}$/$m\ell$ 이상 농도에서도 tyrosinase억제 활성이 나타나지 않는 반면, S. bikiniensis melanin 생합성 저해 효과를 보여 주었다. 동일 농도에서 S. bikinieffsis의 생장에는 영향을 미치지 않았다.

During the screening for inhibitors of melanin biosynthesis from plant extract, Angelica polymorpha MAXIM which showed a high level of inhibition was selected. The inhibiting substances were purified form methanol extract of Angelica polymorpha MAXIM followed by silica gel column chromatography and HPLC. The inhibitors were identified as heraclenin, isosaxalin and heraclenol 3'-Me ether, by spectrescopic methods of ESI-MS, H-NMR, C-NMR, DEPT, HMQC and HMBC. These compounds did not have mushroom tyrosinase inhibitory activity, but showed a highly potent melanin biosynthesis inhibition zone in the plate culture of Streptomyces bikiniensis, a bacterium used as an indicator organism in this work. These compounds did not show any growth inhibition against S. bikiniensis at the same concentration of melanin biosynthesis test.

키워드

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