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Title: Epicardial cell shape and maturation are regulated by Wt1 via transcriptional control of Bmp4
Author: Velecela, Victor
Torres Cano, Alejo
García Melero, Ana
Ramiro-Pareta, Marina
Müller Sánchez, Claudia Alejandra
Segarra Mondéjar, Marc
Chau, You-Ying
Campos Bonilla, Begoña
Reina del Pozo, Manuel
Soriano Zaragoza, Francesc X. (Francesc Xavier)
Hastie, Nicholas D.
Martinez, Fernando O.
Martínez Estrada, Ofelia María
Keywords: Cèl·lules epitelials
Epithelial cells
Issue Date: 1-Oct-2019
Publisher: The Company of Biologists
Abstract: The epicardium plays a crucial role in embryonic heart development and adult heart repair; however, the molecular events underlying its maturation remain unknown. Wt1, one of the main markers of the embryonic epicardium, is essential for epicardial development and function. Here, we analyse the transcriptomic profile of epicardial-enriched cells at different stages of development and from control and epicardial-specific Wt1 knockout (Wt1KO) mice. Transcriptomic and cell morphology analyses of epicardial cells from epicardial-specific Wt1KO mice revealed a defect in the maturation process of the mutant epicardium, including sustained upregulation of Bmp4 expression and the inability of mutant epicardial cells to transition into a mature squamous phenotype. We identified Bmp4 as a transcriptional target of Wt1, thus providing a molecular basis for the retention of the cuboidal cell shape observed in the Wt1KO epicardium. Accordingly, inhibition of the Bmp4 signalling pathway both ex vivo and in vivo rescued the cuboidal phenotype of the mutant epicardium. Our findings indicate the importance of the cuboidal-to-squamous transition in epicardial maturation, a process regulated by Wt1.
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It is part of: Development, 2019, vol. 146, num. 20
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ISSN: 0950-1991
Appears in Collections:Articles publicats en revistes (Fonaments Clínics)
Articles publicats en revistes (Biologia Cel·lular, Fisiologia i Immunologia)

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