한국식품과학회지 (Korean Journal of Food Science and Technology)

한국식품과학회 (Korean Society of Food Science and Technology)
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무모쥐에서 자외선에 의한 피부 장벽 손상에 미치는 커큐민의 보호 효과

Beneficial Effect of Curcumin on Epidermal Permeability Barrier Function in Hairless Rat

  • 전희영 ((주)아모레퍼시픽 기술연구원) ;
  • 김정기 ((주)아모레퍼시픽 기술연구원) ;
  • 김완기 ((주)아모레퍼시픽 기술연구원) ;
  • 이상준 ((주)아모레퍼시픽 기술연구원)
  • 발행 : 2008.12.31
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초록

In vivo에서 8주간의 UVB 처리에 의해 유발되는 피부 장벽 기능 손상에 대한 커큐민의 보호 효능을 관찰한 결과, UVB에 의해 유도되는 경표피 수분손실량의 증가와 비정상적인 각질 세포의 증식이 커큐민의 섭취에 의해 억제됨을 확인하여 커큐민이 피부 장벽 손상을 방어하고 피부 장벽 기능이 정상적으로 작용할 수 있도록 도움을 주는 것을 알 수 있었다. 커큐민의 피부 장벽기능 보호 작용 기전을 살펴보기 위하여 각질형성세포주를 이용하여 피부 장벽 조절인자에 대한 커큐민의 작용을 평가한 결과 커큐민은 filaggrin과 SPT의 발현을 농도 의존적으로 증가시킴을 확인하였으며, 이를 통하여 커큐민이 각질형성세포의 정상적인 분화를 촉진하고 세라마이드 합성에 영향을 미침으로써 피부 장벽 기능을 강화하는 효능이 있음을 추정할 수 있었다. 이상의 결과로부터 커큐민이 피부 장벽 보호 또는 개선 효능을 갖는 새로운 미용 식품 소재로써 이용 가능성이 높음을 알 수 있다. 다만 식품 소재로써 커큐민을 활용하기 위해서는 그간 보고된 커큐민의 낮은 bioavailability에 대한 연구를 참고하여 임상에서 유효한 용량을 설정하기 위한 연구가 더 이루어져야 할 것이다.

Recent research has shown that curcumin has beneficial effects in a variety of skin diseases, including scleroderma, psoriasis, and skin cancer. In this study, we assessed the effects of curcumin on epidermal permeability barrier function in vivo and in vitro. In order to evaluate the effects of curcumin on epidermal permeability barrier function in vivo, hairless rats were exposed to UVB irradiation, and curcumin was administered orally at a dosage of 150 mg/kg per day for 8 weeks. Transepidermal water loss (TEWL) and epidermal thickness were measured at the end of the experiment. The expression of filaggrin, a marker of keratinocyte differentiation, and serine palmitoyltransferase (SPT), a marker of the formation of the stratum corneum lipid barrier, in human HaCat keratinocytes were analyzed. The in vivo results showed that an 8 week administration of curcumin markedly prevented the UVB-induced increase in TEWL. The UV-induced increase in epidermal thickness was also reduced significantly by curcumin treatment. The in vitro results demonstrated the concentration-dependent effects of curcumin on the expression of both filaggrin and SPT in HaCat cells, reflecting the notion that curcumin can induce epidermal keratinocyte differentiation and can improve the recovery of skin barrier functions. These results show that curcumin is a promising candidate for the improvement of epidermal permeability barrier function.

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