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Inhibition of Melanoma Differentiation by Melanogenesis Inhibitor Isolated from Yeast  

Choe Taeboo (Division of Chemical and Biological Engineering, Konkuk University)
Lee Seungsun (Division of Chemical and Biological Engineering, Konkuk University)
Jung Hokwon (Charmzone Cosmetics)
Chul Oh (Division of Chemical and Biological Engineering, Konkuk University)
Publication Information
Journal of the Society of Cosmetic Scientists of Korea / v.31, no.1, 2005 , pp. 25-33 More about this Journal
Abstract
Melanocytes synthesize melanin within discrete organelle termed melanosomes which are transferred to the surrounding keratinocytes and can be produced in varying sizes, numbers and densities. Skin whitening products have become increasingly popular in the past few years. The most successful natural skin whitening agents are: arbutin, vitamin C, kojic acid, and mulberry, which are all tyrosinase inhibitors. In this work, melanoston, a melanogenesis inhibitor isolated from yeast was studied to understand its mechanism of melanogenesis inhibition. It was found that melanoston was not a tyrosinase inhibitor, while when melanoston was applied to the B16 melanoma cell culture media, the intracellular tyrosinase activity was decreased by more than $30\%$. When B16 melanoma was stimulated with $\alpha$-MSH, cell morphololgy was dramatically changed to have lots of dendrites on the cell membrane surface. On the other hand, B16 was treated with $\alpha$-MSH and melanoston, simultaneously, the change of cell morphologv was not so great. This inhibitory effect of melanoston was found to be related to the inhibition of intracellar activation and transportation of tyrosinase, which was observed by irmmunostaining of B16 melanoma using anti-tyrosinase antibody. From these results, melanoston was regarded as an inhibitor to the differentiation of melanoma cells.
Keywords
melanogenesis inhibition; melanoma; cell differentiation; UV radiation; tyrosinase;
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