Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effect of Bu-Zhong-Yi-Qi-Tang on Proliferation of T Cells

보중익기탕의 T세포 증식 유도 효과

  • Published : 2004.08.01
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Abstract

Bu-Zhong-Yi-Qi- Tang extracts is a traditional oriental medicine in a mixture type exhibiting strong anti-bacterial, analgesic, and chemopreventive activities. In this study, we have evaluated effects of the total and polysaccharide fraction of Bu-Zhong-Yi-Qi- Tang extracts on the T cell proliferation, cytokine production, and induction of IL-2 receptor and MHC class n. For this experiment, we established CD4$^{＋}$ CD8$^{[-10]}$ T cell line producing IL-2 and IFN-${\gamma}$ when stimulated with ovalbumin antigen in the presence of antigen presenting cells. The significant effect of Bu-Zhong-Yi-Qi-Tang on antigen-induced T cell proliferation in the presence of antigen presenting cells was observed. The proliferation and IFN-${\gamma}$ production of T cells was increased in a dose dependent manner, and expression of IL-2 receptor on T cells and MHC class n molecule on antigen presenting cells was also induced in the presence of Bu-Zhong-Yi-Qi-Tang polysaccharide fraction. It was demonstrated that polysaccharide fraction of Bu-Zhong-Yi-Qi-Tang stimulates the antigen-induced T cell proliferation and the production of IFN-${\gamma}$ possibly through the increase of IL-2 receptor and MHC class n expression. Therefore Bu-Zhong-Yi-Qi-Tang can be regarded as a natural and useful immunomodulator having a relatively nonotoxic property. Further studies are needed to better characterize the nature of Bu-Zhong- Yi-Qi-Tang extract.

먼저 OVA항원에 대해 특이적으로 증식반응을 나타내는 T세포주를 수립하였고, 수림된 세포주는 세포 표면 단백질이 CD4$^{＋}$CD8$^{-}$이며 IL-2와 IFN-${\gamma}$를 분비하는 Type I에 속하는 보조 T세포(Thl)인 것을 확인하였다. 보중익기탕의 total 분획은 OVA항원에 대해 특이적으로 반응하는 Thl세포의 증식반응을 증가시키는 효과를 나타내지 않았으며 고농도에서 오히려 증식반응을 억제하였다. 그러나, 보중익기탕의 polysaccharide 분획은 전반적 인 농도에서 T세포의 증식반응을 유의하게 증가시키는 효과가 있는 것으로 나타났다. 보중익기탕의 polysaccharide 분획을 첨가하였을 때 T세포의 IL-2 분비량은 대조군보다 약간 적었지만, IFN-${\gamma}$ 분비량은 대조군보다 증가하였다. 그리고, 분비된 IL-2와 결합하는 T세포의 IL-3 수용체 발현양도 증가하는 것으로 나타났다. 또한, 항원제시세포의 MHC class II의 발현양도 증가시켰다. 이상의 결과로 보중익기탕의 polysaccharide분획은 T세포의 IL-2수용체 발현양을 증가시키고, 항원제시세포의 MHC classs II의 발현양을 증가시켜서 T세포의 증식반응을 증가시키는것으로 생각된다 그리고 보중익기탕이 생체 면역반응에 미치는 보다 정확한 효과를 평가하기 위해서는 직접 살아있는 실험동물에 투여하는 in vivo 실험이 필요하다.

Keywords

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