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Title

Tbx5a lineage tracing shows cardiomyocyte plasticity during zebrafish heart regeneration

AuthorsSánchez-Iranzo, Héctor; Galardi-Castilla, María ; Minguillón, Carolina ; Sanz-Morejón, Andrés; González-Rosa, Juan Manuel; Felker, Anastasia; Ernst, Alexander; Guzmán-Martínez, Gabriela; Mosimann, Christian; Mercader, Nadia
Issue Date30-Jan-2018
PublisherNature Publishing Group
CitationNature Communications 9: 428 (2018)
AbstractDuring development, mesodermal progenitors from the first heart field (FHF) form a primitive cardiac tube, to which progenitors from the second heart field (SHF) are added. The contribution of FHF and SHF progenitors to the adult zebrafish heart has not been studied to date. Here we find, using genetic tbx5a lineage tracing tools, that the ventricular myocardium in the adult zebrafish is mainly derived from tbx5a+ cells, with a small contribution from tbx5a− SHF progenitors. Notably, ablation of ventricular tbx5a+-derived cardiomyocytes in the embryo is compensated by expansion of SHF-derived cells. In the adult, tbx5a expression is restricted to the trabeculae and excluded from the outer cortical layer. tbx5a-lineage tracing revealed that trabecular cardiomyocytes can switch their fate and differentiate into cortical myocardium during adult heart regeneration. We conclude that a high degree of cardiomyocyte cell fate plasticity contributes to efficient regeneration.
Publisher version (URL)https://doi.org/10.1038/s41467-017-02650-6
URIhttp://hdl.handle.net/10261/174612
DOI10.1038/s41467-017-02650-6
E-ISSN2041-1723
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