Effects of IGF-I Rich Fraction from Bovine Colostral Whey on Immune Activity of Mouse In Vitro

젖소 초유로부터 분리한 Insulin-like Growth Factor-1 분획이 In Vitro에서 마우스의 면역 활성에 미치는 영향

  • Hwang Hyung-A (Department of Food Science & Biotechnology, Sunggkyunkwan University) ;
  • Yang Hee-Jin (Department of Food Science & Biotechnology, Sunggkyunkwan University) ;
  • Lee Soo-Won (Department of Food Science & Biotechnology, Sunggkyunkwan University)
  • 황경아 (성균관대학교 식품생명공학과) ;
  • 양희진 (성균관대학교 식품생명공학과) ;
  • 이수원 (성균관대학교 식품생명공학과)
  • Published : 2006.03.01

Abstract

Insulin-like growth factor-I(IGF-I) rich fraction, which was obtained molecules ranged between 30 and 1 kDa, was fractionated by ultrafiltration from bovine colostral whey. IGF-I rich fraction was confirmed by SDS-PACE and western blotting and then the quantity of IGF-I was measured by sandwich ELISA. ICF-I concentration in IGF-I rich fraction was 10 ng/mg proteins. IGF-I rich fraction, standard IGF-I and colostral whey weie treated to murine peritoneal macrophages. And then we experimented that effect of immune activity on macrophage and splenocyte. As a result, in group treated with IGF-I rich fraction $1{mu}g/mL$, production of interleukin-6 and nitric oxide were 9.85 ng and $17.17{\mu}M$ and production of phagocytosis, tumor necrosis factor-${\alpha}\;and\;H_{2}O_{2}$ were 78.3, 34.5 and 6% compared to the control group. In splenocyte immune response, B cell and T cell proliferation and NK cell activity were 103, 126 and 22.2% in group treated with IGF-I rich fraction $1{\mu}g/mL$ to compared to the control, respectively.

젖소 초유 whey 내에 존재하는 IGF-I을 분리하기 위하여 ultrafiltration을 사용하여 30과 1 kDa 사이의 IGF-I rich fraction을 분획하였다. 분획한 IGF-I rich fraction내에 IGF-I의 존재 여부는 SDS-PACE와 western blotting으로 확인하였고, sandwich ELISA로써 분획 내 IGF-I을 정량하였다. 그 결과 IGF-I은 단백질 mg당 10 ng으로 측정되었다. 분획한 IGF-I rich fraction을 마우스 복강 macrophge의 면역 활성에 미치는 영향 즉, IL-6, NO, $TNF-{\alpha}$, Phagocytosis, $H_{2}O_{2}$,의 분비 유도 및 생성량을 측정하였고, splenocyte의 면역 활성으로는 splenocyte의 증식 효과와 natural killer cell의 항암작용을 측정하였다. 실험 결과 IGF-I rich fraction $1{\mu}g/mL$ 투여군에서 IL-6의 생성량은 9.85 ng, NO의 생성량은 $17.1{\mu}M$, phagocytosis는 양성 대조구에 대비하여 78.3%의 탐식작용을 나타내었고 $TNF-{\alpha}$$H_{2}O_{2}$의 생성량은 대조구에 대비하여 각각 34.5 및 6% 더 많은 양을 생산하였다. Splenocyte 면역활성에 미치는 영향으로 T cell과 B cell 증식은 대조군에 대비하여 각각 36 및 76%로 더 높은 증식 효과를 나타내었고, NK cell의 활성은 대조군보다 55.4%의 높은 활성을 보였다.

Keywords

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