期刊
CELL
卷 135, 期 6, 页码 1053-1064出版社
CELL PRESS
DOI: 10.1016/j.cell.2008.10.049
关键词
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资金
- NHLBI NIH HHS [HL54737, R01 HL064658-08, HL64658, R01 HL054737, P01 HL089707-01A1, P01 HL089707, R01 HL064658, K08 HL089330] Funding Source: Medline
- NIAMS NIH HHS [R01 AR052130-04, R01 AR052130] Funding Source: Medline
Vascular development begins when mesodermal cells differentiate into endothelial cells, which then form primitive vessels. It has been hypothesized that endothelial-specific gene expression may be regulated combinatorially, but the transcriptional mechanisms governing specificity in vascular gene expression remain incompletely understood. Here, we identify a 44 bp transcriptional enhancer that is sufficient to direct expression specifically and exclusively to the developing vascular endothelium. This enhancer is regulated by a composite cis-acting element, the FOX:ETS motif, which is bound and synergistically activated by Forkhead and Ets transcription factors. We demonstrate that coexpression of the Forkhead protein FoxC2 and the Ets protein Etv2 induces ectopic expression of vascular genes in Xenopus embryos, and that combinatorial knockdown of the orthologous genes in zebrafish embryos disrupts vascular development. Finally, we show that FOX: ETS motifs are present in many known endothelial-specific enhancers and that this motif is an efficient predictor of endothelial enhancers in the human genome.
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