Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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An in vitro study of immune activity by β-1,3/1,6-glucan isolated from Aureobasidium pullulans

Aureobasidium pullulans으로 부터 분리한 β-1,3/1,6-glucan의 면역활성의 연구

  • Received : 2016.10.07
  • Accepted : 2016.10.29
  • Published : 2016.11.30
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Abstract

${\beta}$-Glucan is a natural compound contained in cell walls of yeast or fungi, and cereal's fiber. It is also known to boost the immune system in human. Aureobasidium is a producer of water-soluble ${\beta}$-1,3/1,6-glucan. In this study, natural killer (NK) cell and macrophage activity were tested to investigate the effects of ${\beta}$-1,3/1,6-glucan isolated from A. pullulans on immune activity. Activation of NK cell was increased about 63-39% by the treatment of $10-200{\mu}g/mL$ ${\beta}$-1,3/1,6-glucan than control. Besides, only $10{\mu}g/mL$ of ${\beta}$-1,3/1,6-glucan was enough to boost activation of NK cell. Phagocytosis of macrophage was increased to 15~21% by the treatment of $10{\sim}200{\mu}g/mL$ of ${\beta}$-1,3/1,6-glucan than zymosan-treatment. In LP-BM5 proliferating inhibition test, relative mRNA level of LP-BM5 virus was decreased in ${\beta}$-1,3/1,6-glucan-treated cell about 36~74% than control. The decline of LP-BM5 mRNA level appeared to depend on the concentration of ${\beta}$-1,3/1,6-glucan. These results suggest that pure ${\beta}$-1,3/1,6-glucan from A. pullulans might be contributing to enhancement of immune activity through the activation of NK cell and phagocytosis of macrophage. Moreover, treatment of the ${\beta}$-1,3/1,6-glucan could increase the resistance to virus infection such as LP-BM5 through the restraining of the multiplication.

${\beta}$-Glucan은 효모나 버섯의 세포벽이나 곡물의 섬유에 들어있는 천연 화합물이며, 면역 시스템을 활성화 한다고 알려져 있다. Aureobasidium pullulans 수용성의 ${\beta}$-1,3/1,6-glucan을 생성한다. 본 연구에서는 A. pullulans 로부터 생성된 ${\beta}$-1,3/1,6-glucan의 면역활성에 관한 효과를 조사하기 위하여, 면역활성에 관여하는 NK 세로의 활성과 대식세포에 미치는 영향을 관찰하였다. NK 세포에 의한 Yac-1 세포의 사멸율은 ${\beta}$-1,3/1,6-glucan을 처리한 군은 처리하지 않은 대조군에 비하여 63-39% 증가하는 것으로 나타났고, 대식세포의 탐식작용은 zymosan을 처리한 군보다 15-21% 증가함을 보였다. LP-BM5 바이러스 복제 억제능을 확인하기 위하여 SC-1/LP-BM5 세포주에 ${\beta}$-1,3/1,6-glucan을 처리한 결과 $200{\mu}g/mL$ 처리에서 LP-BM5 바이러스 복제능이 최대 74% 유의적으로 감소하였다. 이 결과는 ${\beta}$-1,3/1,6-glucan이 면역활성에 관여하는 NK 세포와 대식세포를 활성화하여 면역체계가 민감하게 반응할 수 있도록 만들고, LP-BM5 바이러스 복제를 억제하여 면역력을 증진할 수 있다는 것을 보여준다.

Keywords

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