Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Immunomodulatory Effects of Polysaccharides Derived from Persimmon Leaves on Cyclophosphamide-induced Immunosuppressed Mice

감잎 유래 다당체가 면역억제 마우스의 면역조절에 미치는 영향

  • Cho, Chang-Won (Division of Convergence Technology, Korea Food Research Institute) ;
  • Rhee, Young Kyoung (Division of Convergence Technology, Korea Food Research Institute) ;
  • Kim, Young-Chan (Division of Convergence Technology, Korea Food Research Institute) ;
  • Han, Chun-Ji (Food Research Center, Yanbian University) ;
  • Shin, Kwang-Soon (Department of Food Science and Biotechnology, Kyonggi University) ;
  • Hong, Hee-Do (Division of Convergence Technology, Korea Food Research Institute)
  • 조장원 (한국식품연구원 융합기술연구본부) ;
  • 이영경 (한국식품연구원 융합기술연구본부) ;
  • 김영찬 (한국식품연구원 융합기술연구본부) ;
  • 한춘희 (연변대학교 식품연구센터) ;
  • 신광순 (경기대학교 식품생명공학과) ;
  • 홍희도 (한국식품연구원 융합기술연구본부)
  • Received : 2013.06.14
  • Accepted : 2013.07.18
  • Published : 2013.10.31
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Abstract

We prepared 2 different crude polysaccharides from persimmon leaves, by hot water (PLW-0) and pectinase digestion (PLE-0), respectively. PLW-0 and PLE-0 showed similar sugar compositions and contained 11 different sugars, including rarely observed sugars such as 2-methyl-fucose, 2-methyl-xylose, apiose, and aceric acid. However, the uronic acid content of PLE-0 was lower than that of PLW-0, because of pectinase treatment. In normal mice, administration of PLW-0 and PLE-0 increased the spleen index and splenocyte proliferation. The effect of PLE-0 on the spleen index and splenocyte proliferation was greater than that of PLW-0. We subsequently assessed the immunomodulatory activities of PLW-0 and PLE-0 on cyclophosphamide (CY)-induced immunosuppressed mice. We revealed that mice treated with PLW- 0 or PLE-0 showed increased splenocyte proliferation, NK cell activity, and white blood cell numbers. Taken together, our results indicate that PLW-0 and PLE-0 can enhance immune function in normal mice and modulate CY-induced immune suppression.

감잎으로부터 새로운 생리활성 다당 소재를 개발하기 위하여 감잎의 열수추출물로부터 다당획분 PLW-0, pectinase 처리 추출물로부터 다당획분 PLE-0를 분리하여 정상 및 면역 억제 동물모델에서 면역자극활성을 측정하였다. 감잎 유래 다당체들은 정상모델에서 마우스의 면역기관인 비장과 흉선의 무게를 증가시켰으며, 비장세포 유래 림프구의 증식에 농도 의존적으로 증식활성을 보였는데, pectinase 처리 다당 획분 PLE-0의 활성이 열수추출 다당 획분 PLW-0에 비해 전체적으로 높은 활성을 보이는 것을 확인할 수 있었다. 또한 CY에 의해 면역이 억제된 동물모델에서도 CY처리에 의해 저하된 임파구 증식, NK 세포 활성 및 백혈구 수를 현저하게 증가시켰다. 이러한 면역억제 극복 활성 역시 유의적인 차이는 보이지 않았으나 PLE-0가 PLW-0에 비해 높음을 확인할 수 있었다. CY는 악성 종양의 치료 및 장기이식 후 나타나는 거부반응의 억제제로 사용되고 있는 대표적인 약물로 알려져 있다. 그러나 CY의 비선택적인 독성으로 인해 암세포뿐만 아니라 정상세포에도 독성을 나타내어 백혈구 수 감소, 혈소판 감소, 빈혈 등과 같은 부작용을 나타내고 있다. 따라서 최근에는 이와 같은 부작용이나 면역독성을 최소화 할 수 있는 물질을 발굴하고자 하는 연구가 이루어지고 있는데, 본 실험의 결과로부터 감잎 유래 다당체는 정상모델에서의 면역자극 및 CY에 의해 초래된 면역억제를 감소시킴으로써 면역조절제로서의 개발가능성을 제시해 줄 수 있다고 생각된다. 또한 pectinase 처리 다당 PLE-0가 열수추출 다당 PLW-0에 비해 비교적 높은 활성을 보인 것을 감안해 보았을 때 효소처리가 감잎 유래 다당의 활성증가에 도움을 준다는 것을 확인하였다.

Keywords

References

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