کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1931575 | 1050557 | 2010 | 6 صفحه PDF | دانلود رایگان |
Enamelin is an ameloblast-specific matrix protein believed to play essential roles in enamel formation. However, mechanisms of enamelin transcription regulation are not clear. β-Catenin/LEF1 is a key transcriptional complex involved in tooth development. In this study, the role of β-catenin/LEF1 in enamelin expression was investigated. The 5′-flanking region of the mouse enamelin gene was analyzed and cloned. Co-transfection analysis and mutation assays revealed that two conserved LEF1 responsive elements located at −1002 and −597 bp upstream of the enamelin translation initiation site could augment transcriptional activity of the enamelin. The interaction between the enamelin elements and β-catenin/LEF1 was further confirmed by electrophoresis mobility shift assays and chromatin immunoprecipitation assays. In addition, LiCl treatment induced nuclear translocation of β-catenin and elevated endogenous enamelin expression in mouse ameloblast-like cells. The results suggested that Wnt/β-catenin signaling could function in enamelin gene expression by direct interaction through two conserved LEF1 responsive elements on the enamelin gene in ameloblast-like cells.
Research highlights
► β-Catenin/LEF1 complex could activate enamelin gene transcription.
► β-Catenin/LEF1 can directly bind to enamelin 5′ regulatory region.
► Wnt/β-catenin signaling can upregulate enamelin expression in ameloblast-like cells.
Journal: Biochemical and Biophysical Research Communications - Volume 398, Issue 3, 30 July 2010, Pages 519–524