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- W2005983240 abstract "Abstract Gallic acid (GA) is a phenolic compound, which has been reported to suppress melanogenesis in melanoma cells. However, the molecular mechanism underlying this inhibitory effect was poorly understood. In this article, we revealed that GA down‐regulated melanogenic regulatory genes including tyrosinase, tyrosinase related protein‐1 (TRP‐1), and dopachrome tatamerase (Dct) expression at transcriptional and translational level. In addition, GA effectively suppressed the microphthalmia‐associated transcription factor (MITF) expression by down‐regulating the cAMP‐mediated PKA/CREB signaling cascades. To delineate the inhibition of MITF by GA, the activation of extracellular signal‐regulated protein kinase (ERK) and AKT was investigated. GA caused significant increase of ERK and AKT phosphorylation, while ERK (PD98059) or AKT (LY294002) inhibitor prevents their phosphorylation and increased melanin biosynthesis. In addition, pre‐treatment of MITF‐siRNA significantly reduced melanin production from 100 to 40%, and even decreased into 10% by combination treatment with GA. Furthermore, UVB‐induced hyperpigmentation in the mice skin was significantly rescued by topical application of GA for 4 weeks. Immunohistochemical analyses also confirmed that GA significantly inhibited melanin production followed by the down‐regulation of MITF, tyrosinase and their regulatory proteins. In addition, when compared with control zebrafish, GA caused a remarkable inhibition on the endogenous pigmentation in the zebrafish. Results presented in this study strongly suggest that GA is an effective de‐pigmenting or skin lightening cosmetics for topical application. © 2012 BioFactors, 2013" @default.
- W2005983240 created "2016-06-24" @default.
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- W2005983240 date "2013-01-16" @default.
- W2005983240 modified "2023-10-18" @default.
- W2005983240 title "<i>In vitro</i>and<i>in vivo</i>studies disclosed the depigmenting effects of gallic acid: A novel skin lightening agent for hyperpigmentary skin diseases" @default.
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- W2005983240 doi "https://doi.org/10.1002/biof.1064" @default.
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