Abstract
Amelogenin expression is regulated in a cell-type-specific manner. Investigators have previously identified an enhancer element by using the 5ĝ2 flanking sequence of the amelogenin promoter. However, the cell-type-specific regulation of the amelogenin gene remains poorly understood. In some genes, the first intron regulates tissue-specific expression. We hypothesized that intron 1 is important for the cell-type-specific regulation of amelogenin expression. We identified a suppressor element between -74 and -464. We also found enhancer activity in intron 1. Additionally, we found that the suppressor element in the promoter region suppressed intron 1 enhancer activity. The suppressor and the enhancers acted in an ameloblast-like cell line, but not in HeLa cells. Mutation of the Oct-1 binding sites reversed the suppressor activity, suggesting that Oct-1 sites are essential for suppression. These results suggest that Oct-1 and intron 1 may contribute to cell-type-specific amelogenin expression.
Original language | English |
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Pages (from-to) | 246-251 |
Number of pages | 6 |
Journal | Journal of Dental Research |
Volume | 89 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2010 Mar |
Externally published | Yes |
Keywords
- Ameloblast.
- Amelogenin
- Cell-type-specific expression
- Intron
- Oct-1
ASJC Scopus subject areas
- Dentistry(all)