Effects of Ethanol Extracts of Anemarrhena asphodeloides on Skin Barrier Function by Inflammation
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목적 : 본 연구에서는 TNF-α와 IFN-γ로 자극한 인간피부각질형성세포 (HaCaT keratinocytes) 모델을 사용하여 지모가 피부장벽 기능에 미치는 영향을 알아보고자 하였다. 방법 : MTT assay를 통하여 지모 주정(70% 에탄올) 추출물 (EAA)이 HaCaT keratinocytes의 세포생존율에 미치는 영향 을 확인하였으며 wound healing assay를 통해 EAA가 HaCaT 세포의 이주 능력에 영향을 주는지 관찰하였다. 또한 western blot analysis와 qRT-PCR을 통하여 EAA가 TNF-α/IFN-γ로 자극한 HaCaT 세포에서 iNOS의 단백질 발현 및 IL-4, IL-13, IL-6의 mRNA 발현, filaggrin의 단백질과 mRNA 발현에 미치는 영향을 조사하였다. 결과 : EAA는 처리 농도 500μg/㎖까지 HaCaT keratinocytes의 세포생존율에 영향을 미치지 않았다. EAA는 wound healing assay에서 HaCaT 세포의 이주 능력을 증가시켰으며, TNF-α/IFN-γ로 자극한 HaCaT 세포에서 iNOS의 단백질 수 준을 감소시켰다. 또한 EAA가 IL-4, IL-13, IL-6의 mRNA 발현을 억제하는 것 역시 확인할 수 있었다. 뿐만 아니라 EAA는 TNF-α/IFN-γ 자극에 의해 감소했던 filaggrin을 단백질과 mRNA 수준에서 회복시켰다. 결론 : EAA가 HaCaT 세포에서 Th2 type cytokines, pro-inflammatory cytokine의 억제와 filaggrin 회복을 통해 피부장 벽 기능 손상에 대한 억제활성을 갖는 것을 확인하였으며, 이를 통해 EAA가 염증으로 인해 손상된 피부장벽 기능 개선에 효과적일 것으로 사료된다.
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