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Inhibitory effect of Mojaban (Sargassum fulvellum) extract on ultraviolet B-induced photoaging in hairless mouse skin

무모 마우스 피부에서 모자반 추출물의 자외선비(ultraviolet B)에 의해 유도된 광노화 억제 효과

  • Rhim, Dong-Bin (Graduate Program in Biomaterials Science & Engineering, Yonsei University) ;
  • Kim, Changhee (Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University) ;
  • Hwang, Jae-Kwan (Graduate Program in Biomaterials Science & Engineering, Yonsei University)
  • 임동빈 (연세대학교 생물소재공학협동과정) ;
  • 김창희 (연세대학교 생명공학과) ;
  • 황재관 (연세대학교 생물소재공학협동과정)
  • Received : 2020.07.27
  • Accepted : 2020.08.31
  • Published : 2020.10.31

Abstract

Ultraviolet radiation is a major cause of photoaging, characterized by wrinkle formation and skin dehydration. Mojaban (Sargassum fulvellum), belonging to the brown algae of the Sargassaceae family, exerts anti-inflammatory, antioxidant, and anti-atopic activities. Particularly, Mojaban extract alleviated ultraviolet B (UVB)-induced inflammatory responses in human keratinocytes and BALB/c mice. Here, the dorsal skin of hairless mice was exposed to UVB for photoaging. The mice were administrated 300 mg/kg Mojaban extract (S. fulvellum extract; SFE) daily. Phenotypically, SFE reduced wrinkle formation and epidermal thickness and increased skin elasticity. SFE increased hydroxyproline content by upregulating the expression of collagen-related genes and downregulating matrix metalloproteinase expression. Furthermore, SFE increased skin moisture content and inhibited transepidermal water loss. SFE upregulated the expression of involucrin, loricrin, and transglutaminase for cornified envelope formation as well as the expression of filaggrin and caspase-14 for natural moisturizing factors. Collectively, SFE may be employed as a nutraceutical ingredient for anti-photoaging.

자외선(Ultraviolet radiation)은 피부 주름 형성과 피부 건조를 특징으로 하는 광노화의 주요 원인이다. 모자반과(Sargassaceae)에 속하는 모자반(Sargassum fulvellum)은 항염증, 항산화, 항아토피 활성을 갖고 있다. 특히, 모자반은 인간 각질세포(keratinocyte)와 실험동물의 피부에서 UVB에 의한 염증 반응을 완화시키는 것으로 보고되었다. 그러나, 현재까지 모자반 추출물의 광노화 억제 효과에 대해서는 보고된 바가 없다. 본 연구에서는 광노화를 유도하기 위하여 UVB를 SKH-1 무모 마우스의 등 부분에 8주간 처리하였으며, 동시에 모자반 추출물을 300 mg/kg의 농도로 매일 경구 투여하였다. 현상학적으로, 모자반 추출물은 주름 형성, 홍반 및 피부 두께를 감소시켰으며, 피부 탄력을 증가시켰다. 모자반 추출물은 콜라겐 합성 유전의 발현을 증가시키고, matrix metalloproteinase의 발현을 감소시킴으로써 콜라겐의 하이드록시프롤린(hydroxyproline) 함량을 증가시켰다. 추가적으로, 모자반 추출물의 경구 투여는 무모 마우스의 피부 수분 함량을 증가시켰으며, 경피수분손실(transepidermal water loss)을 감소시켰다. 모자반 추출물은 각질세포막 형성에 관여하는 involucrin, loricrin, transglutaminase의 발현과 자연보습인자 관련 생체지표인 filaggrin 및 caspase-14의 발현을 증가시켰다. 종합적으로, 모자반 추출물은 피부의 콜라겐 손실과 건조를 완화함으로써 광노화 억제 활성을 제공하였다. 모자반 추출물은 피부 광노화를 억제하기 위한 기능성 식품 소재로서 활용될 수 있을 것으로 판단된다.

Keywords

References

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