Inhibitory Efficacy of Smilax china L. on MITF, TRP-1, TRP-2, Tyrosinase Protein and mRNA Expression in Melanoma Cell (B16F10)
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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 μl. Furthermore, the 70% ethanol extract showed cytotoxicity of 89% at a concentration of 100 μg/ 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 μg/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 μg/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.
Abstract
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 μl. Furthermore, the 70% ethanol extract showed cytotoxicity of 89% at a concentration of 100 μg/ 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 μg/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 μg/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.
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