Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Chemical Characteristics and Immunostimulating Activity of Crude Polysaccharide Isolated from Commercial Instant Coffee

시판 인스턴트 커피에서 추출한 다당류의 화학적 특성 및 면역활성

  • Kwak, Bong-Shin (Department of Food Science and Biotechnology, Kyonggi University) ;
  • Shin, Kwang-Soon (Department of Food Science and Biotechnology, Kyonggi University)
  • 곽봉신 (경기대학교 식품생물공학과) ;
  • 신광순 (경기대학교 식품생물공학과)
  • Received : 2016.04.05
  • Accepted : 2016.05.10
  • Published : 2016.06.30
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Abstract

To elucidate the new biologically active ingredient in commercial instant coffee, a crude polysaccharide (ICP-0) was isolated by ethanol precipitation, and its immunostimulatory activity was estimated. ICP-0 mainly consisted of galactose (55.5%), mannose (25.7%), arabinose (6.0%), and galacturonic acid (10.1%), suggesting the possibility of its existence as a mixture of galactomannan or pectic polysaccharide. ICP-0 showed proliferative activity in peritoneal macrophages and splenocytes. ICP-0 dose-dependently augmented the production of nitric oxide and reactive oxygen species by peritoneal macrophages. In addition, murine peritoneal macrophages stimulated by ICP-0 showed enhanced production of various cytokines (tumor necrosis factor-${\alpha}$, interleukin-6, and interleukin-12) as compared to unstimulated murine peritoneal macrophages. In an in vitro assay for assessing intestinal immunomodulation, the ICP-0-treated Peyer's patch cells showed higher bone marrow cell proliferation activity at $100{\mu}g/mL$ and higher production of granulocyte-macrophage colony-stimulating factor, compared to the untreated Peyer's patch cells. These results suggest that polysaccharides in commercial instant coffee have a potentiality for macrophage functions and the intestinal immune system.

국내 시판중인 인스턴트 커피에서 다당류를 추출하여 새로운 면역 활성 물질을 확인하고자 하였다. 시판중인 인스턴트 커피를 구입하여 냉수추출 후, 에탄올 침전과 투석을 통하여 약 24%의 높은 수율로 다당류(ICP-0)를 얻을 수 있었다. ICP-0은 중성당 89.9%, 산성당 10.1%로 이루어진 다당체로써, 구성 성분으로는 갈락토스 55.5%, 만노스 25.7%와 소량의 아라비노스, 람노스 등으로 이루어진 것을 확인하였으며, 갈락토만난(galactomannan)이나 팩틴 다당류(pectic polysaccharide)가 혼합된 구조일 것이라고 추정되었다. 인스턴트 커피 유래 ICP-0에 대하여 대식세포 자극에 대한 세포증식능을 확인한 결과, NC 대비 유의적으로 높은 증식활성을 보였으며, IL-6, IL-12 및 TNF-${\alpha}$의 경우, $10{\mu}g/mL$에서도 NC 대비 우수한 사이토카인 분비 유도능을 보임이 확인되었다. 또한 NO, ROS를 분석한 결과에서도 NO의 경우 $10{\mu}g/mL$ 이상에서 NC 대비 양호한 활성을 보여 주었다. ICP-0에 대하여 2차 면역기관 중 하나인 비장세포상의 증식능을 확인한 결과, NC 대비 115% 정도 증식하는 것이 확인되어 면역세포를 직접 증진시키는 마이토겐 활성이 있음을 나타내었다. 인스턴트 커피 유래 ICP-0가 장관 내 분포되어 있는 Peyer's patch를 경유하여 장관면역에 공헌할 수 있는지 여부를 확인한 결과, NC 대비 유의적으로 골수세포의 증식능을 확인하였으며 GM-CSF와 같은 관련 사이토카인의 분비 유도가 확인되었다. 이상의 결과는 시판 인스턴트 커피로부터 분리한 다당류가 대식세포의 기능과 장관면역계를 증진시킬 수 있는 가능성을 제시한다.

Keywords

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