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- W2314157603 abstract "Skin cancer is one of the most commonly diagnosed cancers in United States. Taxifolin (3, 3′, 4′, 5, 7-pentahydroxy-flavanone, (2R,3R)-dihydroquercetin), which is found in many citrus fruits such as grapefruits and oranges, has been studied for multiple biological effects. However, the molecular mechanisms and direct target of taxifolin in skin cancer chemoprevention are unclear. Here we show that taxifolin suppresses UV-induced skin carcinogenesis by directly targeting epidermal growth factor receptor (EGFR) and phosphoinositide 3-kinase (PI3-K). In silico computer screening results suggest that EGFR and PI3-K are potential targets for taxifolin. In vitro and ex vivo pull-down assay data revealed that taxifolin indeed directly interacts with EGFR and PI3-K at the ATP-binding pocket, and inhibited their kinase activities in vitro. UVB-induced phosphorylation of EGFR and Akt were substantially suppressed by taxifolin in mouse skin epidermal JB6 P+ cells. Taxifolin also suppressed UVB-induced phosphorylation of mitogen-activated protein kinases (MAPKs) and cyclooxygenase-2 (COX-2) expression. Importantly, topical treatment with taxifolin to the dorsal skin significantly suppressed tumor incidence, multiplicity and volume in a solar UV-induced skin carcinogenesis mouse model. Further analysis of the solar UV-exposed mouse skin showed that the taxifolin-treated group had a substantial reduction in solar UV-induced phosphorylation of EGFR and Akt. These results suggest that taxifolin exerts potent chemopreventive activity against UV-induced skin carcinogenesis by targeting EGFR and PI3-K.Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 103rd Annual Meeting of the American Association for Cancer Research; 2012 Mar 31-Apr 4; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2012;72(8 Suppl):Abstract nr 1590. doi:1538-7445.AM2012-1590" @default.
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- W2314157603 date "2012-04-15" @default.
- W2314157603 modified "2023-09-23" @default.
- W2314157603 title "Abstract 1590: Taxifolin suppresses UV-induced skin carcinogenesis by targeting EGFR and PI3-K" @default.
- W2314157603 doi "https://doi.org/10.1158/1538-7445.am2012-1590" @default.
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