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논문 상세정보

Tetraselmis suecica유래의 항산화성 물질의 정제 및 구조

Purification and Structure of Antioxidative Substance Derived from Tetraselmis suecica

초록

해양 미세조류는 해양생물의 영양원으로서 대부분 소비되고 있으며, 그 종류도 매우 다양하다. 이들 미세조류로부터 유용물질의 회수 및 이용은 미이용 수산자원의 효율적 이용과 아울러 생물 및 식량자원으로서 그리고 새로운 기능성 소재로서 활용될 수 있을 것이다. 본 연구에서는 이러한 해양 미세조류의 효율적인 이용을 위하여 비교적 성장이 빠르고 배양이 용이한 담녹조류인 T. suecica 중의 항산화성 물질을 분리정제하여 구조를 결정하였다. 미세조류 T. suecica의 유기용매 추출물 중의 항산화성은 chloroform 획분이 가장 좋았으며, 이 획분을 silica gel column chromatography, PTLC 및 HPLC를 사용하여 항산화성 물질을 분리${\cdot}$정제하였다. Silica gel column을 사용하여 분리된 획분의 항산화성은 hexane: ethylacetate (1:5)로 용출시킨 획분에서 가장 높았다. 이 획분은 PTLC에 전개하여 8개의 획분을 얻었으며, 그 중에서 Rf값 0.40인 획분에서 활성이 높게 나타났다 HPLC에서 단일 획분으로 정제된 물질의 항산화성은$IC_{50}$ 값으로 10.2$\mu$g/mL였으며, 화학적으로 합성된 항산화제인 BHT 및 BHA보다는 낮았지만 천연 항산화제인 $\alpha$-tocopherol과 비교될 수 있었다 이 물질의 화학적 구조는 chlorophyll을 전구체로 하는 pheophorbide-a로 동정되었으며, 항산화 활성은 a-tocopherol과 비교될 수 있어 식품 및 관련분야에서 항산화제로서 이용할 수 있을 것으로 기대된다.

Abstract

Tetraselmis suecica (T. suecica) of Prasinophyta was selected because the growth rate is comparatively higher and the culturing is also easy. In order to investigate antioxidative activity, the soluble elements of T. suecica were fractionated using water and organic solvents such as methanol, hexane, chloroform, ethylacetate and butanol. The chloroform fraction of T. suecica showed strong antioxidative activity. The potential antioxidative activity was detected in hexane: ethylacetate (1:5) once used the fractions by different mixtures of organic solvents. This fraction was further purified by preparative thin layer chromatography (PTLC) and repeated reverse-phase HPLC. On the basis of chemical and spectroscopic evidences obtained by UV, FT-IR, FAB-MS and NMR, the compound purified from T. suecica was identified as pheophorbide-a. The antioxidative activity of the compound was comparable to that of $\alpha$-tocopherol and could be act as an antioxidant in foods.

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  1. 2009. "" Algae, 24(4): 205~212 
  2. Lee, Jun Young ; Kim, Mi Kyeong ; Ha, Jun Young ; Kim, Yong Gyun ; Hong, Chang Oh ; Kim, So Young ; Kim, Chung-Hwan ; Kim, Keun Ki 2014. "Isolation and Identification of a Photosensitizer from Pueraria thunbergiana Leaves that Induces Apoptosis in SK-HEP-1 Cells" 생명과학회지 = Journal of life science, 24(3): 242~251 

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