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        성낙연 한국인터넷법학회 2002 인터넷법연구 Vol.1 No.-

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        Gamma-Irradiated Luteolin Inhibits 3-Isobutyl-1-Methylxanthine-Induced Melanogenesis Through the Regulation of CREB/MITF, PI3K/Akt, and ERK Pathways in B16BL6 Melanoma Cells

        변의백,송하연,Sajid Mushtaq,김혜민,강정애,양미소,성낙연,장범수,변의홍 한국식품영양과학회 2017 Journal of medicinal food Vol.20 No.8

        Luteolin was gamma irradiated at doses of 0, 15, 30, 50, 70, and 100 kGy. We observed that the luteolin peak decreased simultaneously with the appearance of new radiolytic peaks, using high-performance liquid chromatography (HPLC). The highest new radiolytic peak gamma-irradiated luteolin (GLM) was observed at a dose of 70 kGy, and the GLM was identified by nuclear magnetic resonance and high-performance-liquid-chromatography-quadrupole-time-of-flight (HPLC-Q-TOF) mass spectrometry. We examined whether 70 kGy gamma-irradiated luteolin has more effective anti-melanogenic effects than intact luteolin. Seventy kilograys of gamma-irradiated luteolin inhibited melanin synthesis and intracellular tyrosinase activity without cytotoxicity, whereas the intact luteolin-treated group did not show anti-melanogenic activity in 3-isobutyl-1-methylxanthine-stimulated B16BL6 melanoma cells. The expression of melanogenic enzymes, such as tyrosinase, tyrosinase-related protein (TRP)-1, and TRP-2, was decreased by 70 kGy gamma-irradiated luteolin treatment, owing to the suppression of microphthalamia-associated transcription factor and 3′,5′-cyclic adenosine monophosphate (cAMP) response element binding protein. In addition, gamma-irradiated luteolin decreased the phosphorylation of phosphoinositide 3-kinase (PI3K)/Akt and extracellular regulated kinase (ERK). The anti-melanogenic effects of 70 kGy gamma-irradiated luteolin were attenuated by the treatment of two specific inhibitors (PD98059 and LY294002), and these results indicate that the anti-melanogenic effects were mediated by ERK and PI3K signaling pathways. Therefore, our findings suggest that gamma-irradiated luteolin can be a potential cosmeceutical agent for skin whitening.

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