Journal of the Society of Cosmetic Scientists of Korea (대한화장품학회지)

Society of Cosmetic Scientists of Korea (대한화장품학회)
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Hexane Fraction of Melandrium firmum Extract Induces Laminin-332 Expression in Human Keratinocyte

각질형성세포에서 왕불유행 헥산 분획물이 Laminin-332 발현에 미치는 효과

  • 송혜진 ((주)LG생활건강 기술연구원) ;
  • 김미선 ((주)LG생활건강 기술연구원) ;
  • 이홍구 ((주)LG생활건강 기술연구원) ;
  • 진무현 ((주)LG생활건강 기술연구원) ;
  • 이상화 ((주)LG생활건강 기술연구원)
  • Received : 2016.04.20
  • Accepted : 2016.06.23
  • Published : 2016.06.30
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Abstract

Skin basement membrane (BM) is a specialized structure that binds dermis and epidermis of the skin and plays an important role in maintaining skin structure. Structural change and destruction of BM is reported to appear due to UV exposure and aging, which may contribute to skin aging including wrinkle formation and a decrease in elasticity of the skin. One of the key components of the BM is laminin-332 (LN-332), and is a major contributor to epidermal-dermal attachment. In this study, we elucidated the effects of Meladrium firmum hexane fraction (MFHF) on LN-332 expression in HaCaT, a human keratinocyte cell line. Quantitative real-time PCR (RT-PCR) and immunoblot analysis revealed that MFHF induced upregulation of LN-332 gene and protein expression. Next, cells were treated with p38 MAPK inhibitor (SB202190) prior to MFHF treatment to analyze the signaling pathway contributing to LN-332 expression. The mRNA and protein levels of LN-332 expression were suppressed completely by pretreatment with p38 MAPK inhibitor. Furthermore, MFHF also increased the mRNA level of collagen type VII and integrin ${\alpha}6$ of skin BM component. These results collectively suggest that MFHF may have potential as an effective agent to stimulate the synthesis of BM components, and could be used to improve phenomenon of skin aging ascribed to the structural and functional impairments of BM in aged human skin.

피부 기저막(basement membrane, BM)이란 표피와 진피 사이에 존재하는 특별한 구조물로 표피와 진피를 단단히 고정시켜 피부 구조를 유지하는 데에 중요한 역할을 수행한다. 노화 및 자외선 노출에 의한 피부 기저막의 구조적 변화와 파괴는 피부 주름 형성과 탄력 저하를 포함하는 피부노화 현상의 요인으로 여겨지고 있다. Laminin-332 (LN-332)는 피부 기저막을 구성하는 주성분으로 피부에서 표피와 진피를 단단히 고정시키는데 중요한 역할을 한다. 본 연구에서는 왕불유행 헥산 분획물(Melandrium firmum hexane fraction, MFHF)이 각질형성세포에서 LN-332 발현에 미치는 효과를 확인하였다. 정량적 real-time PCR (RT-PCR)과 단백질 발현 분석을 통해서 MFHF가 LN-332의 mRNA 발현 및 단백질 발현을 촉진시키는 것을 확인하였다. 또한 MFHF가 어떤 신호전달 경로를 통해 LN-332 발현을 조절하는지 확인하기 위하여 p38 MAPK 억제제인 SB202190과 ERK1/2 억제제인 U0126을 처리한 결과, p38 MAPK 억제제에 의해서 LN-332 발현이 완벽히 억제됨을 확인하였다. 또한, 피부 기저막을 구성하고 있는 콜라겐 타입 VII과 integrin ${\alpha}6$의 mRNA 발현 역시 MFHF에 의해 증가하는 것을 확인하였다. 우리는 본 연구를 통해 MFHF가 각질형성세포에 작용하여 피부 기저막을 구성하는 성분들의 생성을 촉진할 수 있는 소재로 작용할 수 있다는 것을 확인하였다. 이러한 결과는 기저막의 구조적, 기능적 이상에 의해 나타나는 피부노화 현상의 개선을 위해 활용할 수 있을 것이라 제안한다.

Keywords

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