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In relation to this article, we declare that there is no conflict of interest.
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Received April 1, 2008
Accepted May 30, 2008
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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Inhibition of melanogenesis by Erigeron canadensis via down-regulating melanogenic enzymes in B16F10 melanoma cells

Department of Biological Engineering, Inha University, Incheon 402-751, Korea
ekkim@inha.ac.kr
Korean Journal of Chemical Engineering, November 2008, 25(6), 1463-1466(4), 10.1007/s11814-008-0240-x
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Abstract

The effects of Erigeron canadensis extract on melanogenesis and cell toxicity in cultured B16F10 mouse melanoma cells were investigated. E. canadensis extract down regulated melanin synthesis effectively at a non-toxic concentration. Its extract was fractionated by using a recycling HPLC with GS310 column (21.5×500 mm, 10-15 μM) into five fractions. The fraction 1 showed melanin inhibition by 48.0% at 100 mg/ml which was 2.5 times more efficient than the depigmenting effect of commercial arbutin (17.5%) and also did not show cell toxicity. To elucidate the depigmenting mechanism of fraction 1, in vitro and cellular tyrosinase activity, antioxidant activity, and protein level of the main melanogenic enzymes, such as tyrosinase, TRP-1 and TRP-2 were evaluated. Fraction 1 inhibited melanin synthesis in B16F10 melanoma cells by decreasing protein levels of melanogenic enzymes, especially tyrosinase. In_x000D_ conclusion, we suggest that this fraction may be a safe and effective depigmentation agent.

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