Abstract

본 연구에서는 1-chloro-2,4-dinitrobenzene (DNCB)로 유도한 아토피 피부염 동물 모델인 NC/Nga mice에 대한 Eurya emarginata 에탄올 추출물(EE-70E)의 면역 조절 효능을 확인하고자 하였다. DNCB를 5주간 도포하여 유도한 아토피 동물 모델인 NC/Nga mice에 EE-70E를 3주간 경구 투여한 후 scratching behavior 및 clinical skin severity score, 혈청 면역지표(IL-4, IL-13, IL-17, histamine, IgG1, IgE)의 농도를 측정하였다. DNCB를 도포하여 3주동안 경구 투여한 결과, EE-70E의 200 및 400mg/kg 용량에서 clinical skin severity의 감소, scratching behavior의 감소 및 혈중 IL-4 및 IL-13, IL-17, histamine, IgE의 농도가 대조군과 비교하여 유의성 있게 농도의존적으로 감소하는 결과가 관찰되었다(p<0.05). EE-70E의 경구투여는 NC/Nga mice 아토피 피부염 동물모델에서 면역조절 작용 및 아토피 피부염의 개선 효과를 가짐을 나타냈다. 따라서 EE-70E은 아토피 피부염에 유용한 천연자원으로서 기대된다. In this study, a test for the immunity control effect by ethanolic extract of Eurya emarginata (EE-70E) on NC/Nga mice as the models for atopic dermatitis was conducted with the following results. Atopic dermatitis in NC/Nga mice was induced by repeated application of 1-chloro-2,4-dinitrobenzene (DNCB) for 5 weeks. Mice were orally administered EE-70E or terfenadine, positive control for 3 weeks. Scratching behavior, clinical skin severity, and the levels of IL-4, L-13, IL-17, total serum IgG1, and total serum IgE were measured. The oral administration with EE-70E doses of 200 or 400 mg/kg significantly decreased scratching behavior scores and clinical skin severity score in a dose-dependent manner (p<0.05). The administration of EE-70E at 400 mg/kg significantly decreased cytokines within the blood serum, that is, IL-4, L-13, and IL-17 compared to the control group (p<0.05). The level of blood histamine was statistically significantly decreased. Administration of EE-70E at 400 mg/kg significantly decreased the levels of total serum IgE (p<0.05). The above results indicated that EE-70E was effective in improving the symptoms of atopic dermatitis through various immunity control mechanisms.

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