Movie 2.

Apical delamination of a wt1b-overexpressing cardiomyocyte in a cardiac ventricle at 2 dpf. In vivo time-lapse imaging of a myl7:Gal4;eGFP:UAS:RFP and a myl7:Gal4;eGFP:UAS:wt1b heart between 2 and 3 days post fertilization (dpf) acquired with the Leica TCS SP8 DLS confocal microscope, using the digital light sheet (DLS) mode. Shown is the reconstruction of a single plane of the beating ventricle. Note the rounded cells extruding from the ventricle in the myl7:Gal4;eGFP:UAS:wt1b heart (right panel, arrow). Scale bar, 50 μm.

Wt1 transcription factor impairs cardiomyocyte specification and drives a phenotypic switch from myocardium to epicardium

Ines J. Marques, Alexander Ernst, Prateek Arora, Andrej Vianin, Tanja Hetke, Andrés Sanz-Morejón, Uta Naumann, Adolfo Odriozola, Xavier Langa, Laura Andrés-Delgado, Benoît Zuber, Carlos Torroja, Marco Osterwalder, Filipa C. Simões, Christoph Englert, and Nadia Mercader

Development 2022. 149:None-None; doi: 10.1242/dev.200375