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In relation to this article, we declare that there is no conflict of interest.
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Received June 2, 2010
Accepted November 15, 2010
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Depigmenting effect of Sterculia lynchnophera on B16F10 melanoma and C57BL/6 melan-a cells

Department of Biological Engineering, National Research Lab of Skin Bioactive Material, Inha University, Incheon 402-751, Korea 1Cosmetic Research Center, Enprani Co., Ltd., Incheon 400-103, Korea 2Department of Dermatology, College of Medicine, Inha University, Incheon 402-751, Korea
ekkim@inha.ac.kr
Korean Journal of Chemical Engineering, April 2011, 28(4), 1074-1077(4), 10.1007/s11814-010-0484-0
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Abstract

To develop a novel skin depigmenting agent from natural sources, the inhibition of melanogenesis by the Chinese herb, Sterculia lynchnophera (SL), was evaluated. Treatment of B16F10 melanoma cells and melan-a cells with SL exhibited a 32.9% and 68.2% inhibition of melanin synthesis without cytotoxicity at a concentration of 200μg/ml, respectively. This herb possessed a high free radical scavenging activity with IC50=11.02 μM. The methanol extract of SL slightly inhibited in vitro mushroom tyrosinase activity (23.4% at a concentration of 200 μg/ml) and had a significant inhibitory effect on cellular tyrosinase activivity (48.65% and 88.56% inhibition at the concentration 200μg/ml in B16F10 cells and C57BL/6 melan-a cells, respectively). From the western blotting results, SL inhibited the expression of tyrosinase and tyrosinase related protein 1 (TRP-1). Taken together, we suggest that SL may be a safe and effective depigmentation agent.

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