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Endothelial deletion of Wt1 disrupts coronary angiogenesis and myocardium development
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Wt1 encodes a zinc finger protein that is crucial for epicardium development. Although WT1 is also expressed in coronary endothelial cells (ECs), the abnormal heart development observed in Wt1 knockout mice is mainly attributed to its functions in the epicardium. Here, we have generated an inducible endothelial-specific Wt1 knockout mouse model (Wt1KOΔEC). Deletion of Wt1 in ECs during coronary plexus formation impaired coronary blood vessels and myocardium development. RNA-Seq analysis of coronary ECs from Wt1KOΔEC mice demonstrated that deletion of Wt1 exerted a major impact on the molecular signature of coronary ECs and modified the expression of several genes that are dynamically modulated over the course of coronary EC development. Many of these differentially expressed genes are involved in cell proliferation, migration and differentiation of coronary ECs; consequently, the aforementioned processes were affected in Wt1KOΔEC mice. The requirement of WT1 in coronary ECs goes beyond the initial formation of the coronary plexus, as its later deletion results in defects in coronary artery formation. Through the characterization of these Wt1KOΔEC mouse models, we show that the deletion of Wt1 in ECs disrupts physiological blood vessel formation.
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RAMIRO PARETA, Marina, MÜLLER SÁNCHEZ, Claudia alejandra, PORTELLA-FORTUNY, Rosa, SOLER BOTIJA, Carolina, TORRES CANO, Alejo, ESTEVE CODINA, Anna, BAYÉS GENÍS, Antoni, REINA DEL POZO, Manuel, SORIANO ZARAGOZA, Francesc x. (francesc xavier), MONTAÑEZ, Eloi, MARTÍNEZ ESTRADA, Ofelia maría. Endothelial deletion of Wt1 disrupts coronary angiogenesis and myocardium development. _Development_. 2023. Vol. 150, núm. 6. [consulta: 23 de gener de 2026]. ISSN: 0950-1991. [Disponible a: https://hdl.handle.net/2445/200831]