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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/26667

    標題: Melanogenesis inhibition by a crude extract of Magnolia officinalis
    作者: Ding, Hsiou-Yu
    Chang, Te-Sheng
    Chiang, Chien-Min
    Li, Sin-Yi
    Tseng, Deng-Yu
    貢獻者: 化粧品科技研究所
    關鍵字: Magnolia officinalis
    日期: 2011-01
    上傳時間: 2013-06-03 15:52:49 (UTC+8)
    出版者: Academic Journals
    摘要: In the present study, we investigated the inhibitory effect of a crude extract from Magnolia officinalis (MOE) on melanogenesis in both mouse B16 melanoma cells and zebrafish. Our results showed that MOE inhibited melanogenesis in either a-melanocyte stimulating hormone (a-MSH)- or 3-isobutyl-1-methylxanthin (IBMX)-stimulated B16 cells in a dose-dependent manner with an IC50 value of 9.3 µg/ml. In addition, MOE also inhibited cellular tyrosinase activity with an IC50 value of 13.4 µg/ml while no inhibitory activity was found by MOE against cell-free tyrosinase activity. Moreover, western blotting and real time reverse-transcription polymerase chain reaction (qRT-PCR) analyses, respectively confirmed that MOE downregulated levels of tyrosinase protein but not that of its mRNA in a-MSH-stimulated B16 cells. These results demonstrated that MOE inhibits melanogenesis of B16 cells by a pre-translational regulation on tyrosinase gene expression. On the other hand, when using zebrafish as a depigmenting assay system, MOE could inhibit both melanogenesis and tyrosinase activity in the in vivo model. From the present study, MOE was proven to be a good candidate as a skin-whitening agent for treatment of skin hyperpigmentation.
    Appears in Collections:[化妝品應用與管理系(所)] 期刊論文
    [生物科技系(所)] 期刊論文

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