복분자가 B16 세포주의 Tyrosinase, TRP-1 and TRP-2 발현에 미치는 영향
Effects of Rubus coreanus Miquel on the Expressions of Tyrosinase, TRP-1 and TRP-2 in B16 Melanoma Cells
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Abstract
Melanogenesis is induced mainly by ultraviolet radiation of sunlight and α-melanocyte-stimulating hormone (α-MSH) which binds to a specific G protein coupled receptor. The purpose of this study was to investigate the mechanism of melanogenesis inhibition in B16/F10 cells by methanol extract of Rubus coreanus Miquel (RCM). In the present study, α-MSH and forskolin led to a stimulation of melanin synthesis that appeared to result from an increased tyrosinase activity and melanin content. However, RCM inhibited the α-MSH- and forskolin-induced melanin synthesis. In addition, RCM abolished the α-MSH- and forskolin-induced cytoplasmic dendricity. Regarding protein levels of the melanogenic enzymes, the amounts of tyrosinase and tyrosinase-related protein 1 (TRP-1) were increased after incubation with α-MSH and forskolin. The treatment of RCM decreased the α-MSH- and forskolin-induced expression levels of tyrosinase and TRP-1. Based on these findings, it is likely that RCM exerts its depigmenting effects in B16/F10 cells through the suppression of tyrosinase and TRP-1 expression, which are key enzymes for melanogenesis.
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