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VE-cadherin-CreERT2 transgenic mouse: a model for inducible recombination in the endothelium.

To introduce temporal control in genetic experiments targeting the endothelium, we established a mouse line expressing tamoxifen-inducible Cre-recombinase (Cre-ERT2) under the regulation of the vascular endothelial cadherin promoter (VECad). Specificity and efficiency of Cre activity was documented by crossing VECad-Cre-ERT2 with the ROSA26R reporter mouse, in which a floxed-stop cassette has been placed upstream of the beta-galactosidase gene. We found that tamoxifen specifically induced widespread recombination in the endothelium of embryonic, neonatal, and adult tissues. Recombination was also documented in tumor-associated vascular beds and in postnatal angiogenesis assays. Furthermore, injection of tamoxifen in adult animals resulted in negligible excision (lower than 0.4%) in the hematopoietic lineage. The VECad-Cre-ERT2 mouse is likely to be a valuable tool to study the function of genes involved in vascular development, homeostasis, and in complex processes involving neoangiogenesis, such as tumor growth.

Pubmed ID: 17072878 RIS Download

Mesh terms: Animals | Animals, Newborn | Antigens, CD | Cadherins | Endothelium, Vascular | Female | Genes, Reporter | Integrases | Male | Mice | Mice, Inbred C57BL | Mice, Transgenic | Models, Genetic | Pregnancy | Recombination, Genetic | Tamoxifen

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