Regulatory Effect of Inflammatory Cytokines Secretion and Hypoxia-inducible $Factor-1{\alpha}$ Activation by Panax ginseng

국문 초록 (Abstract)

목적 : 인삼은 다양한 생물학적 작용이 있다. 그 중 항염증작용과 관련하여 염증성 사이토카인 분비 및 저산소 유도인자-1${\alpha}$ 활성화 조절 효과를 살펴보고자 한다. 방법 : phorbol myristate acetate (PMA)+A23187에 유도된 세포에서 염증성 cytokines 분비의 변화와 인간의 mast cell인 HMC-1 cells에서 hypoxia-inducible factor-1 (HIF-1)${\alpha}$의 작용을 관찰하였다. 결과 : PMA+A23187은 대조군과 비교해서 interleukin $(IL)-1{\beta}$, IL-6와 tumor necrosis factor $(TNF)-{\alpha}$의 분비를 증가시킨다. 또한 증가된 cytokines IL-1, IL-6, $TNF-{\alpha}$가 인삼의 처리에 의해 두드러지게 억제하는 것을 확인하였다. 인삼(5 ${\mu}g/ml$)은 $IL-1{\beta}$, IL-6, $TNF-{\alpha}$의 분비를 약 105.1${\pm}$9.7%, 95${\pm}$9.4%, 29.7${\pm}$4.5%,(P<0.05)로 최대로 억제하였고, PMA+A23187에 유도된 vascular endothelial growth factor (VEGF)와 granulocyte macrophage-colony stimulating factor (GM-CSF)의 분비를 41.3%와 75.7%로 각각 억제하였다. 그리고 저자는 인삼이 PMA+A23187로 유도된 HIF-1${\alpha}$ 발현과 HIF-1에 대해 DNA binding activity를 억제하고 있음을 관찰하였다. 결론 : 인삼이 HIF-1에서 염증반응을 억제함을 나타내고, 이는 인삼이 염증성 질환을 치료하는데 유익한 효과가 있음을 의미한다.

다국어 초록 (Multilingual Abstract)

Purpose : Panax ginseng(PG) is considered to have salutary effects and stimulant actions on physical capacity. However, the effects of PG on the inflammatory cytokine secretion and hypoxia condition are still not understood. This study wasto elucidate the effect of PG on inflammatory cytokine secretion such as interleukin (IL)-1, IL-6, granulocyte macrophage colony stimulating factor (GM-CSF), and tumor necrosis factor $(TNF)-{\alpha}$. Also, the effects on the expression of vascular endothelial growth factor (VEGF) and hypoxia-inducible factor 1 (HIF-1) were measured. Methods : The water extract of PG was administrated to HMC-1 cells before phorbol myristate acetate (PMA)+A23187 treatment. $IL-1{\beta}$, IL-6, $TNF-{\alpha}$, GM-CSF, and VEGF secretion were measured by a modified enzyme-linked immunosorbent assay (ELISA). HIF-1 activation was measured by transcription factor enzyme-linked immunoassay (TF-EIA) Results : PG significantly decreased secretion of $IL-1{\beta}$, IL-6, $TNF-{\alpha}$, and GM-CSF in PMA+A23187-induced HMC-1 cells. VEGF secretion was not changed but HIF-1 activation was decreased by the treatment of PG. Conclusions : PG inhibited the secretion of inflammatory cytokines, which impliesPG might contribute to treatment of mast cell-mediated inflammatory disease. Also, PG inhibited PMA+A23187-induced $HIF -1{\alpha}activation}$ and DNA-binding activity for HIF-1. Therefore, these data demonstrate that PG modulates inflammatory cytokines through inhibition of $HIF-1{\alpha}activation}$ activation.