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In vivo cell tracking of mouse embryonic myoblasts and fast fibers during development

AutorGuerrero, Lucia ; Arredondo, Juan J. ; Cervera, Margarita
Fecha de publicación2014
EditorJohn Wiley & Sons
CitaciónGenesis 52(9): 793-808 (2014)
ResumenFast and slow TnI are co-expressed in E11.5 embryos, and fast TnI is present from the very beginning of myogenesis. A novel green fluorescent protein (GFP) reporter mouse lines (FastTnI/GFP lines) that carry the primary and secondary enhancer elements of the mouse fast troponin I (fast TnI), in which reporter expression correlates precisely with distribution of the endogenous fTnI protein was generated. Using the FastTnI/GFP mouse model, we characterized the early myogenic events in mice, analyzing the migration of GFP+ myoblasts, and the formation of primary and secondary myotubes in transgenic embryos. Interestingly, we found that the two contractile fast and slow isoforms of TnI are expressed during the migration of myoblasts from the somites to the limbs and body wall, suggesting that both participate in these events. Since no sarcomeres are present in myoblasts, we speculate that the function of fast TnI in early myogenesis is, like Myosin and Tropomyosin, to participate in cell movement during the initial myogenic stages.
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URIhttp://hdl.handle.net/10261/124548
DOI10.1002/dvg.22796
Identificadoresdoi: 10.1002/dvg.22796
issn: 1526-954X
e-issn: 1526-968X
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