Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Characterization of Immuno-stimulating Polysaccharides Isolated from Korean Persimmon Vinegar

감식초에서 분리한 면역활성다당의 특성

  • Hwang, Yong-Chul (Department of Food Science & Biotechnology, Kyonggi University) ;
  • Shin, Kwang-Soon (Department of Food Science & Biotechnology, Kyonggi University)
  • 황용철 (경기대학교 식품생물공학과) ;
  • 신광순 (경기대학교 식품생물공학과)
  • Published : 2008.04.30
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Abstract

In this study, polysaccharides were isolated from Korean persimmon vinegar to characterize the polysaccharides existing as soluble forms within traditional Korean fermented beverages, and their immuno-stimulating activities were examined. Three successive chromatographies were used to purify the main polysaccharide in the persimmon vinegar, PV-1b-I, to homogeneity from the crude polysaccharide (PV-0). The molecular mass of PV-1b-I was estimated as 110 kDa and it contained significant proportions of mannose (46.8%), galactose (28.5%) and arabinose (19.1%). PV-1b-I strongly reacted with ${\beta}$-glucosyl Yariv reagent, suggesting the presence of an arabino-3,6-galactan moiety. PV-1b-I also induced high levels of macrophage activation and mitogenicity on murine splenocytes in vitro. The intravenous administration of PV-1b-I significantly augmented NK cytotoxicity against YAC-1 tumor cells. PV-1b-I also showed potent anticomplementary activity in a dose-dependent manner. Finally, C3 activation products were identified by crossed immunoelectrophoresis using anti-human C3 and the anti-complementary activity of PV-1b-I under $Ca^{2+}$-free conditions, suggesting that this PV-1b-I causes complementary activations via both alternative and classical pathways. From these results, one can conclude that Korean persimmon vinegar contains select polysaccharides in addition to healthy components, and these polysaccharides appear to provide immuno-stimulating activities beneficial to human health.

한국 전통발효음료 중에 존재하는 특이다당류의 화학적 특성 및 생물활성을 규명할 목적으로, 농가에서 직접 발효한 감식초로부터 다당류를 분리하고 이들의 각종 면역증강활성에 대해 검토하였다. 감식초에 80% ethanol 침전을 행하여 얻어진 조다당 획분 PV-0을 이용, 연속적인 3회의 column chromatography를 행하여, 감식초의 주요 다당인 PV-1b-I으로 정제할 수 있었다. PV-1b-I획분은 HPLC상에서 대칭을 유지하는 단일 peak로 검출되었으며, 분자량은 약 110 kDa으로 평가되었다. 정제다당인 PV-1b-I의구성당 조성을 확인한 결과, mannose(46.8%), galactose(28.5%) 및 arabinose(19.1%)를 높은 비율로 함유하고 있었다. 또한 본 정제다당은 ${\beta}$-glucosyl Yariv reagent와 강하게 반응하는 특성을 보여주었으며 이러한 사실로부터 PV-1b-I이 arabino-3,6-galactan 부위를 소유함을 확인할 수 있었다. 한편 감식초에서 정제한 다당 PV-1b-I은 in vitro상에서 macrophage의 활성화를 높은 비율로 유도하였으며, 비장세포에 대해 높은 증식능을 보였다. 또한 PV-1b-I을 정맥 투여한 경우, NK cell을 활성화하여 YAC-1 종양세포에 대한 세포독성을 증가시킴이 관찰되었다. 한편 고분자 정제 다당인 PV-1b-I는 비특이적 면역계에 있어 중요 역할을 담당하고 있는 보체계에 대하여 농도 의존적인 활성화 경향을 보였다. 이들은 $Ca^{2+}$ 이온이 제거된 상태에서의 항보체 활성과 anti-human C3를 이용한 2차원 면역전기영동에 의하여 C3 산물을 동정한 결과로부터 보체계의 classical pathway와 alternative pathway 양 경로를 모두 경유하여 활성을 나타냄을 확인할 수 있었다.

Keywords

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