Effect of Green Tea Catechins on the Expression and Activity of MMPs and Type I Procollagen Synthesis in Human Dermal Fibroblasts

사람 섬유아세포에서 녹차 카테킨이 노화 인자인 MMP와 type 1 Procollagen 발현에 미치는 영향

  • 신현정 (태평양기술연구원 피부과학연구소) ;
  • 김수남 (한국과학기술연구원 강릉분원) ;
  • 김정기 (태평양기술연구원 피부과학연구소) ;
  • 이병곤 (태평양기술연구원 피부과학연구소) ;
  • 장이섭 (태평양기술연구원 피부과학연구소)
  • Published : 2006.06.30

Abstract

Although many studies have been performed to elucidate the molecular consequence of factors that regulate skin aging, little is known about the effect of green tea catechins except EGCG. The matrix metalloproteinase (MMP), can degrade matrix proteins and results in a collagen deficiency in photodamaged skin, are known to play an important role in photoaging. This study, investigated the effects of green tea catechins on the UVA-induced MMP-1 expression, activity of MMP-2 and synthesis of type I procollagen in human dermal fibroblasts. We examined eight catechins that naturally exist in green tea leaves and compared their efficacies among them. Most of catechins inhibited the expression of MMP-1 in dose dependent manner, and the levels were reduced, especially, 57.4 and 68.2% by treatment with $1{\mu}M$ of epigallocatechin-3-gallate (EGCG) and gallocatechin-3-gallate (GCG), respectively. Also, catechins significantly suppressed the activities of MMP-2. Catechins also induced the expression of type I procollagen, however, they acted only at the concentration below $1{\mu}M$ interestingly. Furthermore, when EGCG:GCG:ECG had the ratio of 0.5:1.5:.1.3, they presented the most effective on procollagen synthesis. Therefore, we concluded that catechins significantly inhibited MMPs and induced collagen synthesis. Taken together, all these results suggested that green tea catechins might be good natural materials act as an anti-photoaging and a skin-aging improving agent.

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