Inhibitory Efficacy of Smilax china L. on MITF, TRP-1, TRP-2, Tyrosinase Protein and mRNA Expression in Melanoma Cell (B16F10)

The purpose of this study was to assess the whitening effects of an extract from Smilax china L., which is a vine shrub belonging to the lily family. With regard to the whitening effects, 70% ethanol and water extracts from Smilax china L. showed more than 77.6% and 40.2% tyrosinase inhibition at a concentration of $1,000{\mu}l$. Furthermore, the 70% ethanol extract showed cytotoxicity of 89% at a concentration of $100{\mu}g/ml$ in melanoma cells. Western blot showed that the inhibitory effect of the 70% ethanol extract on MITF, TRP-1, TRP-2, and tyrosinase protein expression decreased by 89.9%, 46.2%, 57.6%, and 55.8%, respectively, at a concentration of $50{\mu}g/ml$. Moreover, reverse transcription-PCR showed that the inhibitory effect of the 70% ethanol extract on MITF, TRP-1, TRP-2, and tyrosinase mRNA expression decreased by 78.5%, 58.0%, 78.8%, and 70.8%, respectively, at the same concentration of $50{\mu}g/ml$ concentration. Further, realtime PCR showed that the 70% ethanol extract-induced decrease in MITF, TRP-1, TRP-2, and tyrosinase quantitative mRNA expression rate was concentration-dependent. The findings suggest that the extract from Smilax china L. has great potential as a cosmetic ingredient with whitening effects.

멜라노마 세포(B16F10)에서 청미래 덩굴 뿌리 추출물의 MITF, TRP-1, TRP-2, tyrosinase 단백질 및 mRNA 발현 억제 효과

본 연구에서는 청미래 덩굴 뿌리 추출물의 미백효과를 확인하기 위해서 tyrosinase 저해활성 및 미백관련 인자인 MITF, TRP-1, TRP-2, tyrosinase의 단백질 및 유전자 발현억제 효과를 western blot, reverse transcription-PCR 및 real time-PCR을 측정하였다. 그 결과 우수한 tyrosinase 저해활성을 확인하였고, 미백관련 인자 MITF, TRP-1, TRP-2, tyrosinase 단백질 및 유전자 발현측정에서도 4가지 인자 모두 발현이 억제됨으로써 미백 효능이 있음을 확인할 수 있었다. 따라서 청미래 덩굴 뿌리 추출물이 미백 효능을 가짐으로써 화장품 소재로 응용이 가능할 것으로 판단된다.